CN111315848A - Liquid crystal display element - Google Patents

Abstract

The subject to be solved by the present invention is to provide a liquid crystal composition that satisfies various properties required for a liquid crystal composition and has improved response speed and contrast, and to provide a liquid crystal display element using the same. The present invention provides a liquid crystal composition containing a compound represented by the general formula (i), and further containing one or two selected from the group of compounds represented by the general formulae (N-1d) and (N-1) more than one compound. In particular, it is useful as an n-type liquid crystal composition containing an n-type compound having a negative dielectric anisotropy. And a liquid crystal display element using this liquid crystal composition is provided.

Description

Liquid crystal display element

technical field

The present invention relates to a liquid crystal composition and a liquid crystal display element using the same.

Background technique

Liquid crystal display elements have been used in clocks and electronic calculators, and have been used in various household electrical equipment, industrial measurement equipment, automotive panels, mobile phones, smart phones, notebook PCs, tablet PCs, and televisions. Typical examples of the liquid crystal display system include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, GH (Guest-Host) type, IPS (In-Plane Switching) type, FFS (Fringe Field Switching) type, OCB (optically compensated birefringence) type, ECB (electrically controlled birefringence) type, VA (vertical alignment) type, CSH (color super-vertical) type, FLC (ferroelectric liquid crystal), etc. In addition, the driving method includes static driving, multiplex driving, simple matrix method, active matrix (AM) method driven by TFT (Thin Film Transistor), TFD (Thin Film Diode), or the like. It is known that among these display modes, IPS type, FFS type, ECB type, VA type, CSH type, etc., exhibit a negative value by using a liquid crystal composition (n-type liquid crystal composition) having a negative dielectric constant anisotropy (Δε). favorable characteristics.

Among the mainstream display systems using n-type liquid crystal compositions, there are VA type and PSA (Polymer Sustained Alignment, polymer stable alignment) type or PSVA (Polymer Sustained Alignment) type in which the alignment is controlled by further polymerizing a polymerizable compound in the liquid crystal phase. Stabilized Vertival Alignment, vertical alignment represented by polymer stabilized vertical alignment) type and horizontal alignment represented by IPS type and FFS type. The vertical alignment method has the characteristics of wide viewing angle, high transmittance, high contrast, and fast response speed, and is mainly used for large-scale display elements such as TV and monitors. On the other hand, the horizontal alignment method is adopted in mobile devices such as smartphones and tablet PCs from the viewpoints of wide viewing angle, high transmittance, low power consumption, and optimum compatibility with touch panels, and further It is also gradually used in LCD TVs.

As a liquid crystal composition whose Δε is negative, a liquid crystal composition using the following liquid crystal compounds (A) and (B) having a 2,3-difluorophenylene skeleton (refer to Patent Document 1) is disclosed.

[hua 1]

This liquid crystal composition uses the liquid crystal compounds (C) and (D) as liquid crystal compounds with Δε substantially 0, but cannot sufficiently achieve low viscosity in liquid crystal compositions requiring high-speed response such as liquid crystal televisions.

[hua 2]

On the other hand, a liquid crystal composition using a liquid crystal compound (E) has been disclosed, and a liquid crystal composition having a small refractive index anisotropy (Δn) in combination with the liquid crystal compound (D) described above has been disclosed (see Patent Document 2), in order to The liquid crystal composition in which the liquid crystal compound (F) was added to improve the response speed (refer to Patent Document 3).

[hua 3]

In addition, a liquid crystal composition using a liquid crystal compound (G) and a liquid crystal compound (F) has been disclosed (refer to Patent Document 4), but a faster response speed is required.

[hua 4]

Furthermore, a liquid crystal composition combining a liquid crystal compound (I) with a large Δn and a large bending elastic constant (K ₃₃ ) is disclosed (see Patent Document 5), but a faster response speed and a high voltage holding ratio (VHR) are required.

[hua 5]

From the above, all liquid crystal compositions need to balance the fast response speed and high VHR required for liquid crystal display elements at a higher level.

Patent Document 6 discloses that the response speed of a vertical liquid crystal cell is improved by using a liquid crystal material having a large index represented by (Formula 1). However, the disclosed liquid crystal materials do not exhibit sufficient performance.

[Number 1]

FoM=K ₃₃ ·Δn ² /γ1 (Formula 1)

(In the formula, K ₃₃ represents the elastic constant, Δn represents the refractive index anisotropy, and γ1 represents the rotational viscosity.)

In addition, in Non-Patent Document 1, it is known that regardless of the driving method, the response speed of the liquid crystal material is represented by the following formula.

[Number 2]

τ _off =γ ₁ d ² /kπ ²

Here, τ _off is the response speed when changing from a voltage-applied state to a no-voltage-applied state, γ ₁ is the rotational viscosity of the liquid crystal material, d is the thickness of the liquid crystal layer, and k is an elastic constant. Therefore, it can be seen that, in general, a reduction in γ ₁ and an increase in k are effective in reducing the response speed.

Next, regarding the front contrast (hereinafter referred to as the contrast) in the liquid crystal display device, since the brightness during black display is not zero but has a finite value (hereinafter referred to as the black brightness), it is defined as the effective transmittance of the liquid crystal panel. A value obtained by dividing the brightness at the time of white display (hereinafter referred to as white brightness) determined by the over-rate by the black brightness. Therefore, the contrast ratio can be increased by increasing the white luminance as much as possible and/or setting the black luminance to a small value. Usually lowering the black level helps more.

It is known that liquid crystal material scatters light due to thermal motion, which increases black brightness and thus reduces contrast. The main reason for increasing the black luminance mentioned here is light leakage in the front direction (direction perpendicular to the liquid crystal layer) of the liquid crystal display. This effect is generally greater in the horizontal orientation mode than in the vertical orientation mode.

In Patent Document 7 and Non-Patent Document 2, the following formula is proposed for light leakage due to the liquid crystal layer, and it has been confirmed by experiments.

[Number 3]

I∝S _lc ={Δn(n _e +n _o )} ² ·d/K

Here, I in the formula refers to the light leakage intensity of the liquid crystal layer (transmittance observed when arranged between crossed polarizers), S _lc refers to the scattering index, Δn refers to the refractive index anisotropy of the liquid crystal material, _ne refers to the refractive index of abnormal light, _no refers to the refractive index of normal light, d refers to the thickness of the liquid crystal layer, and K refers to the average elastic constant, which can be expressed as (K ₁₁ +K ₂₂ +K ₃₃ )/3. It should be noted that K ₁₁ represents a splay elastic constant, K ₂₂ represents a torsional elastic constant, and K ₃₃ represents a bending elastic constant. These Δn, _ne , no and d are basically fixed in the panel design, so it is required for the liquid crystal composition to satisfy Δn, _{ne ,} and no ₍ it is necessary to set Δn×d to a certain value.) and increase K , by realizing this, the black luminance of the liquid crystal display element can be reduced and the contrast ratio can be improved.

From the above, liquid crystal compositions must have a high nematic phase-isotropic liquid phase transition temperature (T _NI ), a low solid phase-nematic phase transition temperature (T _CN ), and have excellent low-temperature storage stability, Further, the rotational viscosity (γ ₁ ) is required to be sufficiently small, the refractive index anisotropy (Δn) to be large, and the elastic constant (k or K) to be large. Liquid crystal display elements for these applications are required to have both a fast response speed and a high contrast ratio.

prior art literature

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 8-104869

Patent Document 2: European Patent Application Publication No. 0474062

Patent Document 3: Japanese Patent Laid-Open No. 2006-037054

Patent Document 4: Japanese Patent Laid-Open No. 2001-354967

Patent Document 5: Japanese Patent Laid-Open No. 2017-52960

Patent Document 6: Japanese Patent Laid-Open No. 2006-301643

Patent Document 7: Japanese Patent No. 4682376

Non-patent literature

Non-Patent Document 1: EKISHO Vol.5 No.3p.253(63)2001

Non-Patent Document 2: EKISHO Vol.13 No.2p.119(35)2009

SUMMARY OF THE INVENTION

The problem to be solved by the invention

The subject to be solved by the present invention is to provide a liquid crystal composition that satisfies the aforementioned various properties required for a liquid crystal composition and has improved response speed and contrast, and to provide a liquid crystal display element using the same.

Means for solving problems

The inventors of the present invention have studied various liquid crystal compounds and various chemical substances, found that the aforementioned problems can be solved by selecting and adjusting their contents, and completed the present invention.

Invention effect

The liquid crystal composition of the present invention satisfies various properties required for the liquid crystal composition, and has improved response speed and contrast, and has excellent display properties. In particular, excellent characteristics are exhibited by using a liquid crystal composition having a negative dielectric constant anisotropy (Δε). The liquid crystal display element of the present invention can provide a liquid crystal display element of a VA type, an FFS type, or an IPS type. The liquid crystal display element is suitable for mobile phones, smart phones, notebook PCs, tablet PCs, LCDs for vehicles, PID (Public Information Display, public information display), TVs, monitors, and the like.

Detailed ways

Hereinafter, % means mass % unless otherwise stated.

The composition of the present invention contains the compound represented by formula (i), and further contains one or more compounds selected from the group consisting of compounds represented by general formula (N-1d) and general formula (N-1).

[hua 6]

[hua 7]

(In the formula, R ^Nd11 and R ^Nd12 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may each independently be replaced by -CH=CH -, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted,

n ^Nd11 represents 1, 2 or 3. )

[hua 8]

(In the formula, R ^N11 and R ^N12 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may each independently be represented by -CH=CH -, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted,

n ^N11 and n ^N12 independently represent 0, 1, 2 or 3, n ^N11 +n ^N12 represent 1, 2 or 3,

A ^N11 and A ^N12 each independently represent a group selected from the group consisting of,

(a) 1,4-cyclohexylene (one -CH ₂ - or two or more non-adjacent -CH ₂ - present in this group may be substituted with -O-.),

(b) 1,4-phenylene (1 -CH= or non-adjacent 2 or more -CH= present in this group may be substituted by -N=.) and

(c) Naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (naphthalene-2,6-diyl Or one -CH= or two or more non-adjacent -CH= present in 1,2,3,4-tetrahydronaphthalene-2,6-diyl may be substituted by -N=.)

The above-mentioned group (a), group (b) and group (c) may each independently be replaced by an alkyl group (one -CH ₂ - present in the group or two or more -CH ₂ - which are not adjacent to each other) may be substituted by -O-.), alkenyl (one -CH ₂ - present in the group or two or more -CH ₂ - present in the group may be substituted by -O-.), cyano group, fluorine atom or chlorine atom substitution,

Z ^N11 and Z ^N12 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ - , -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C-,

When there are multiple A ^N11 and/or A ^N12 , they may be the same or different, and when there are multiple Z ^N11 and/or Z ^N12 , they may be the same or different, but the compound represented by the general formula (N-1d) except. )

The lower limit of the preferable content of the compound represented by formula (i) in the liquid crystal composition of the present application is 1%, 2%, 3%, 5%, 6%, and the upper limit of the preferable content is 15%, 13% , 12%, 10%, 8%, 7%. In order to improve the response speed and contrast, the content is preferably large, and when the storage stability at low temperature is important, it is less preferable to increase the content.

The compound represented by the general formula (N-1d) corresponds to a compound having a negative dielectric property (the sign of Δε is negative and the absolute value thereof is greater than 2).

The compound represented by the general formula (N-1d) may be used alone or in combination of two or more. You can also use 3 or more types in combination.

The compound represented by the formula (i), the compound represented by the general formula (N-1d) in the case of containing, and the compound represented by the general formula (N-1) in the case of containing with respect to the total amount of the composition of the present invention The lower limit of the preferred content of the indicated compound is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%.

The compound represented by general formula (N-1d) is the following compound.

[Chemical 9]

(In the formula, R ^Nd11 and R ^Nd12 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may each independently be replaced by -CH=CH -, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted,

n ^Nd11 represents 1, 2 or 3. )

As for the compound represented by general formula (N-1d), only 1 type may be used and 2 or more types may be used for it.

In the general formula (N-1d), R ^Nd11 is preferably an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkene having 2 to 8 carbon atoms. The oxy group is preferably an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkenyloxy group having 2 to 5 carbon atoms, more preferably a carbon atom an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, more preferably an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms, particularly preferably an alkenyl group having 3 carbon atoms ( acryl). Preferred are linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and it is preferably linear.

Particular preference is given to ethyl and propyl.

R ^Nd12 is preferably an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms, preferably 1 carbon atom ～5 alkyl, alkoxy having 1 to 5 carbon atoms, alkenyl having 2 to 5 carbon atoms, or alkenyloxy having 2 to 5 carbon atoms, more preferably an alkyl group having 1 to 5 carbon atoms or The alkenyl group having 2 to 5 carbon atoms is more preferably an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms, and particularly preferably an alkenyl group (propenyl group) having 3 carbon atoms. Preferred are linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and it is preferably linear.

Particular preference is given to methoxy and ethoxy.

n ^Nd11 is preferably 1 or 2, preferably a compound in which n ^Nd11 is 1 and a compound in which n ^Nd11 is 2 at the same time.

One or two kinds of compounds in which n ^Nd11 is 1 may be used, but from the viewpoint of improving the minimum temperature of the nematic phase, two kinds are preferably used, and when two kinds are used, R ^Nd11 is preferably the same substituent.

One or two types of compounds in which n ^Nd11 is 2 may be used, but from the viewpoint of improving the lower limit temperature of the nematic phase, two types are preferably used, and when two types are used, it is preferable that R ^Nd12 be the same substituent.

When using a compound in which n ^Nd11 is 1 and a compound in which n ^Nd11 is 2 at the same time, it is preferable to use more of the compound in which n ^Nd11 is 2.

The compound represented by the general formula (N-1d) is preferably the compound represented by the general formula (N-1-10) and the compound represented by the general formula (N-1-11).

The compound represented by the general formula (N-1-10) is the following compound.

[Chemical 10]

(In the formula, R ^N1101 and R ^N1102 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1101 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl, butyl, vinyl or 1-propenyl. R ^N1102 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by general formula (N-1-10) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, the content is preferably set higher, when the solubility at low temperature is emphasized, the effect is better when the content is higher, and when the T _NI is emphasized, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-10) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Further, the compound represented by general formula (N-1-10) is preferably a compound selected from the group of compounds represented by formula (N-1-10.1) to formula (N-1-10.21), preferably formula (N- 1-10.1) to (N-1-10.5), compounds represented by formula (N-1-10.20) and formula (N-1-10.21), preferably formula (N-1-10.1) and formula (N-1) -10.2), compounds represented by formula (N-1-10.20) and formula (N-1-10.21), preferably compounds represented by formula (N-1-10.1) and formula (N-1-10.2), preferably A compound represented by formula (N-1-10.2).

[Chemical 11]

The compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-10.20) and formula (N-1-10.21) can be used alone or in combination, relative to The lower limit of the preferred content of the total amount of the composition of the present invention, alone or these compounds is 3%, 5%, 8%, 10%, 13%, 15%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18% with respect to the total amount of the composition of the present invention.

The compound represented by general formula (N-1-11) is the following compound.

[Chemical 12]

(In the formula, R ^N1111 and R ^N1112 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl, butyl, vinyl or 1-propenyl. R ^N1112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by general formula (N-1-11) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set lower, and when T _NI is important, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-11) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Further, the compound represented by the general formula (N-1-11) is preferably a compound selected from the group of compounds represented by the formula (N-1-11.1) to the formula (N-1-11.14), preferably the formula (N- 1-11.2), compounds represented by formula (N-1-11.4), formula (N-1-11.11) and (N-1-11.14).

[Chemical 13]

The compounds represented by the formula (N-1-11.2) and the formula (N-1-11.4) may be used alone or in combination, and relative to the total amount of the composition of the present invention, alone or under the preferred content of these compounds. Limits are 3%, 5%, 8%, 10%, 13%, 15%. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

It is preferable to use formula (N-1-10.1), formula (N-1-10.2), formula (N-1-11.2), formula (N-1-11.4), formula (N-1-11.11) and formula ( Three to six compounds selected from the compounds represented by N-1-11.14) are preferably represented by formula (N-1-10.1), formula (N-1-11.2) and formula (N-1-11.4) The combination of compounds represented by formula (N-1-10.1), formula (N-1-10.2), formula (N-1-11.2) and formula (N-1-11.4) is preferably used, preferably A combination of compounds represented by formula (N-1-10.2), formula (N-1-11.11) and formula (N-1-11.14) is used.

As for the compound represented by general formula (N-1), only 1 type may be used and 2 or more types may be used for it. The compound represented by the general formula (N-1) corresponds to a compound having negative dielectric properties (the sign of Δε is negative and the absolute value thereof is greater than 2).

The compound represented by general formula (N-1) is the following compound.

[Chemical 14]

(In the formula, R ^N11 and R ^N12 each independently represent an alkyl group having 1 to 8 carbon atoms, and one or two or more non-adjacent -CH ₂ - in the alkyl group may each independently be represented by -CH=CH -, -C≡C-, -O-, -CO-, -COO- or -OCO- substituted,

n ^N11 and n ^N12 represent 0, 1, 2 or 3, n ^N11 +n ^N12 represent 1, 2 or 3,

A ^N11 and A ^N12 each independently represent a group selected from the group consisting of,

(a) 1,4-cyclohexylene (one -CH ₂ - or two or more non-adjacent -CH ₂ - present in this group may be substituted with -O-.) and

(b) 1,4-phenylene (One -CH= or two or more non-adjacent -CH= present in this group may be substituted by -N=.)

(c) Naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (naphthalene-2,6-diyl Or one -CH= or two or more non-adjacent -CH= present in 1,2,3,4-tetrahydronaphthalene-2,6-diyl may be substituted by -N=.)

The above-mentioned group (a), group (b) and group (c) may each independently be replaced by an alkyl group (one -CH ₂ - present in the group or two or more -CH ₂ - which are not adjacent to each other) may be substituted by -O-.), alkenyl (one -CH ₂ - present in the group or two or more -CH ₂ - present in the group may be substituted by -O-.), cyano group, fluorine atom or chlorine atom substitution,

Z ^N11 and Z ^N12 each independently represent a single bond, -CH ₂ CH ₂ -, -(CH ₂ ) ₄ -, -OCH ₂ -, -CH ₂ O-, -COO-, -OCO-, -OCF ₂ - , -CF ₂ O-, -CH=NN=CH-, -CH=CH-, -CF=CF- or -C≡C-,

When there are multiple A ^N11 and/or A ^N12 , they may be the same or different, and when there are multiple Z ^N11 and/or Z ^N12 , they may be the same or different, but the compound represented by the general formula (N-1) The compound represented by the general formula (N-1d) is not included. )

The compound represented by the general formula (N-1) is preferably a compound whose Δε is negative and whose absolute value is greater than 3.

In the general formula (N-1), R ^N11 and R ^N12 are each independently preferably an alkyl group having 1 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, or The alkenyloxy group having 2 to 8 carbon atoms is preferably an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkyl group having 2 to 5 carbon atoms. The alkenyloxy group is more preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, more preferably an alkyl group having 2 to 5 carbon atoms or an alkenyl group having 2 to 3 carbon atoms, particularly preferably An alkenyl group (propenyl group) having 3 carbon atoms.

In addition, when the ring structure to which it is connected is a phenyl group (aromatic), a straight-chain alkyl group having 1 to 5 carbon atoms, a straight-chain alkoxy group having 1 to 4 carbon atoms, and When the alkenyl group having 4 to 5 carbon atoms is connected to a saturated ring structure such as cyclohexane, pyran, and dioxane, it is preferably a linear alkane having 1 to 5 carbon atoms. group, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and it is preferably linear.

The alkenyl group is preferably selected from groups represented by any one of formula (R1) to formula (R5). (Black dots in each formula represent carbon atoms in the ring structure.)

[Chemical 15]

Preferred are an alkyl group having 1 to 5 carbon atoms and an alkoxy group having 1 to 5 carbon atoms, and preferred are methyl, ethyl, propyl, methoxy, ethoxy and propoxy.

A ^N11 and A ^N12 are preferably aromatic when it is necessary to increase Δn, respectively, and are preferably aliphatic in order to improve the response speed, and preferably represent trans-1,4-cyclohexylene, 1,4-phenylene, 2-Fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 2,3-difluoro-1,4- Phenylene, 1,4-cyclohexenylene, 1,4-bicyclo[2.2.2]octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene -2,6-diyl or 1,2,3,4-tetrahydronaphthalene-2,6-diyl, more preferably represents the following structure,

[Chemical 16]

Trans-1,4-cyclohexylene, 1,4-cyclohexenylene or 1,4-phenylene are preferred, trans-1,4-cyclohexylene or 1,4-phenylene are more preferred .

Z ^N11 and Z ^N12 preferably each independently represent -CH ₂ O-, -CF ₂ O-, -CH ₂ CH ₂ -, -CF ₂ CF ₂ - or a single bond, more preferably -CH ₂ O-, -CH ₂ CH ₂ - or a single bond, particularly preferably -CH ₂ O- or a single bond.

n ^N11 +n ^N12 is preferably 1 or 2, preferably the combination of n ^N11 is 1 and n ^N12 is 0, the combination of n ^N11 is 2 and n ^N12 is 0, the combination of n ^N11 is 1 and n ^N12 is 1, the combination of n ^N11 is 2 and n ^N12 is a combination of 1.

However, the compound represented by the general formula (N-1d) is excluded.

The lower limit of the preferable content of the compound represented by the general formula (N-1) is 1%, 10%, 20%, 30%, 40%, 50%, 55% with respect to the total amount of the composition of the present invention , 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%.

The lower limit of the preferable content of the compound represented by the general formula (N-1d) and the compound represented by the general formula (N-1) in total with respect to the total amount of the composition of the present invention is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%, 20%.

When the viscosity of the composition of the present invention is kept low and a composition with a fast response speed is required, it is preferable that the lower limit value is low and the upper limit value is low. Furthermore, when the Tni of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferable that the lower limit value is low and the upper limit value is low. In addition, when it is desired to increase the dielectric constant anisotropy in order to keep the driving voltage low, it is preferable to increase the above-mentioned lower limit value and to make the upper limit value high.

As a compound represented by general formula (N-1), the compound group represented by following general formula (N-1a) - (N-1g) is mentioned.

[Chemical 17]

(wherein, R ^N11 and R ^N12 have the same meanings as R ^N11 and R ^N12 in the general formula (N-1), n ^Na11 represents 0 or 1, n ^Nb11 represents 1 or 2, n ^Nc11 represents 0 or 1, n ^Ne11 represents 1 or 2, n ^Nf11 represents 1 or 2, n ^Ng11 represents 1 or 2, A ^Ne11 represents trans-1,4-cyclohexylene or 1,4-phenylene, A ^Ng11 represents trans-1 ,4-cyclohexylene, 1,4-cyclohexenylene or 1,4-phenylene and at least one represents 1,4-cyclohexenylene, Z ^Ne11 represents a single bond or ethylene and at least one 1 represents ethylene.)

More specifically, the compound represented by the general formula (N-1) is preferably a compound selected from the group of compounds represented by the general formulae (N-1-1) to (N-1-21).

The compound represented by general formula (N-1-1) is the following compound.

[Chemical 18]

(In the formula, R ^N111 and R ^N112 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N111 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a propyl group, a pentyl group or a vinyl group. R ^N112 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group or a butoxy group.

The compound represented by general formula (N-1-1) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set higher, and when T _NI is important, the content is set lower Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-1) is 5%, 10%, 13%, 15%, 17%, 20%, 23% with respect to the total amount of the composition of the present invention %, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

Further, the compound represented by the general formula (N-1-1) is preferably a compound selected from the group of compounds represented by the formula (N-1-1.1) to the formula (N-1-1.23), preferably the formula (N- The compounds represented by 1-1.1) to (N-1-1.4) are preferably compounds represented by formula (N-1-1.1) and formula (N-1-1.3).

[Chemical 19]

The compounds represented by the formulae (N-1-1.1) to (N-1-1.22) may be used alone or in combination, and the lower limit of the preferred content of the compounds alone or with respect to the total amount of the composition of the present invention Values are 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

The compound represented by general formula (N-1-2) is the following compound.

[hua 20]

(In the formula, R ^N121 and R ^N122 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group, a butyl group or a pentyl group. R ^N122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably methyl, propyl, methoxy, ethoxy or propyl Oxygen.

The compound represented by general formula (N-1-2) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set less, and when T _NI is important, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-2) is 5%, 7%, 10%, 13%, 15%, 17%, 20% with respect to the total amount of the composition of the present invention. %, 23%, 25%, 27%, 30%, 33%, 35%, 37%, 40%, 42%. The upper limit of the preferred content is 50%, 48%, 45%, 43%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%.

Further, the compound represented by general formula (N-1-2) is preferably a compound selected from the group of compounds represented by formula (N-1-2.1) to formula (N-1-2.22), preferably formula (N- 1-2.3) to formula (N-1-2.7), formula (N-1-2.10), formula (N-1-2.11), formula (N-1-2.13) and formula (N-1-2.20) The compound represented by the formula (N-1-2.3) to the formula (N-1-2.7) is preferable when the improvement of Δε is important, and the compound represented by the formula (N-1-2.7) is preferable when the improvement of T _NI is important. 2.10), the compounds represented by the formula (N-1-2.11) and the formula (N-1-2.13) are preferably the compounds represented by the formula (N-1-2.20) when it is important to improve the response speed.

[Chemical 21]

The compounds represented by formula (N-1-2.1) to formula (N-1-2.22) may be used alone or in combination, and relative to the total amount of the composition of the present invention, alone or under the preferred content of these compounds. Limits are 5%, 10%, 13%, 15%, 17%, 20%, 23%, 25%, 27%, 30%, 33%, 35%. The upper limit of the preferred content is 50%, 40%, 38%, 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3%.

The compound represented by the general formula (N-1-3) is the following compound.

[Chemical 22]

(In the formula, R ^N131 and R ^N132 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 3 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably 1-propenyl, ethoxy, propoxy or butoxy base.

The compound represented by general formula (N-1-3) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, the content is preferably set higher, when the solubility at low temperature is emphasized, the effect is better when the content is higher, and the content is higher when the T _NI is emphasized. Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-3) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Further, the compound represented by the general formula (N-1-3) is preferably a compound selected from the group of compounds represented by the formula (N-1-3.1) to the formula (N-1-3.21), preferably the formula (N- Compounds represented by 1-3.1) to (N-1-3.7) and formula (N-1-3.21), preferably formula (N-1-3.1), formula (N-1-3.2), formula (N-1) -3.3), compounds represented by formula (N-1-3.4) and formula (N-1-3.6).

[Chemical 23]

The compounds represented by formula (N-1-3.1) to formula (N-1-3.4), formula (N-1-3.6) and formula (N-1-3.21) can be used alone or in combination. From the combination of formula (N-1-3.1) and formula (N-1-3.2), two types of formula (N-1-3.3), formula (N-1-3.4) and formula (N-1-3.6) or a combination of 3. The lower limit of the preferred content of the compounds alone or in the present invention is 5%, 10%, 13%, 15%, 17%, 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-4) is the following compound.

[Chemical 24]

(In the formula, R ^N141 and R ^N142 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N141 and R ^N142 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably methyl, propyl, ethoxy group or butoxy.

The compound represented by general formula (N-1-4) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set higher, and when T _NI is important, the content is set lower Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-4) is 3%, 5%, 7%, 10%, 13%, 15%, 17% with respect to the total amount of the composition of the present invention %, 20%. The upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 11%, 10%, 8%.

Further, the compound represented by the general formula (N-1-4) is preferably a compound selected from the group of compounds represented by the formula (N-1-4.1) to the formula (N-1-4.14), preferably the formula (N- The compounds represented by 1-4.1) to (N-1-4.4) are preferably compounds represented by formula (N-1-4.1), formula (N-1-4.2) and formula (N-1-4.4).

[Chemical 25]

The compounds represented by the formulae (N-1-4.1) to (N-1-4.14) may be used alone or in combination, and the lower limit of the preferred content of the compounds alone or with respect to the total amount of the composition of the present invention Values are 3%, 5%, 7%, 10%, 13%, 15%, 17%, 20%. The upper limit of the preferred content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 11%, 10%, 8%.

The compound represented by general formula (N-1-5) is the following compound.

[Chemical 26]

(In the formula, R ^N151 and R ^N152 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N151 and R ^N152 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably ethyl, propyl or butyl .

The compound represented by general formula (N-1-5) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set less, and when T _NI is important, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-5) is 5%, 8%, 10%, 13%, 15%, 17%, 20% with respect to the total amount of the composition of the present invention. %. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Further, the compound represented by the general formula (N-1-5) is preferably a compound selected from the group of compounds represented by the formula (N-1-5.1) to the formula (N-1-5.6), preferably the formula (N-1 -5.1), a compound represented by formula (N-1-5.2) and formula (N-1-5.4).

[Chemical 27]

The compounds represented by formula (N-1-5.1), formula (N-1-5.2) and formula (N-1-5.4) may be used alone or in combination, and relative to the total amount of the composition of the present invention, The lower limit of the preferable content of these compounds alone or is 5%, 8%, 10%, 13%, 15%, 17%, 20%. The upper limit of the preferable content is 35%, 33%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-12) is the following compound.

[Chemical 28]

(In the formula, R ^N1121 and R ^N1122 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1121 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1122 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by general formula (N-1-12) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set higher, and when T _NI is important, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-12) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-13) is the following compound.

[Chemical 29]

(In the formula, R ^N1131 and R ^N1132 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1131 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1132 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by general formula (N-1-13) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, the content is preferably set higher, when the solubility at low temperature is emphasized, the effect is better when the content is higher, and the content is higher when the T _NI is emphasized. Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-13) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by general formula (N-1-14) is the following compound.

[Chemical 30]

(In the formula, R ^N1141 and R ^N1142 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1141 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1142 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by general formula (N-1-14) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set higher, and when T _NI is important, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-14) is 5%, 10%, 13%, 15%, 17%, 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by general formula (N-1-15) is the following compound.

[Chemical 31]

(In the formula, R ^N1151 and R ^N1152 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1151 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1152 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-15) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, the content is preferably set higher, when the solubility at low temperature is emphasized, the effect is better when the content is higher, and the content is higher when the T _NI is emphasized. Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-15) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-16) is the following compound.

[Chemical 32]

(In the formula, R ^N1161 and R ^N1162 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1161 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1162 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by the general formula (N-1-16) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set higher, and when T _NI is important, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-16) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-17) is the following compound.

[Chemical 33]

(In the formula, R ^N1171 and R ^N1172 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1171 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably an ethyl group, a propyl group or a butyl group. R ^N1172 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by general formula (N-1-17) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, the content is preferably set higher, when the solubility at low temperature is emphasized, the effect is better when the content is higher, and the content is higher when the T _NI is emphasized. Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-17) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-18) is the following compound.

[Chemical 34]

(In the formula, R ^N1181 and R ^N1182 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1181 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably a methyl group, an ethyl group, a propyl group or a butyl group. R ^N1182 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, preferably an ethoxy group, a propoxy group or a butoxy group.

The compound represented by general formula (N-1-18) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set higher, and when T _NI is important, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-18) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

Further, the compound represented by general formula (N-1-18) is preferably a compound selected from the group of compounds represented by formula (N-1-18.1) to formula (N-1-18.5), preferably formula (N- The compounds represented by 1-18.1) to (N-1-11.3) are preferably compounds represented by formula (N-1-18.2) and formula (N-1-18.3).

[Chemical 35]

The compound represented by the general formula (N-1-20) is the following compound.

[Chemical 36]

(In the formula, R ^N1201 and R ^N1202 independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1201 and R ^N1202 are preferably each independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl.

The compound represented by general formula (N-1-20) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, the content is preferably set higher, when the solubility at low temperature is emphasized, the effect is better when the content is higher, and the content is higher when the T _NI is emphasized. Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-20) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-21) is the following compound.

[Chemical 37]

(In the formula, R ^N1211 and R ^N1212 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1211 and R ^N1212 are preferably each independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl.

The compound represented by general formula (N-1-21) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When the improvement of Δε is emphasized, the content is preferably set higher, when the solubility at low temperature is emphasized, the effect is better when the content is higher, and the content is higher when the T _NI is emphasized. Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (N-1-21) is 5%, 10%, 13%, 15%, 17%, and 20% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13% with respect to the total amount of the composition of the present invention.

The compound represented by the general formula (N-1-22) is the following compound.

[Chemical 38]

(In the formula, R ^N1221 and R ^N1222 each independently represent the same meanings as R ^N11 and R ^N12 in the general formula (N).)

R ^N1221 and R ^N1222 are preferably each independently an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably ethyl, propyl or butyl.

The compound represented by general formula (N-1-22) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When emphasis is placed on improving Δε, the content is preferably set higher, when emphasis is placed on solubility at low temperature, the effect is better when the content is set higher, and when T _NI is important, the content is set higher Some work well. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by the formula (N-1-21) is 1%, 5%, 10%, 13%, 15%, 17%, 20% with respect to the total amount of the composition of the present invention. %. The upper limit of the preferable content is 35%, 30%, 28%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 5% with respect to the total amount of the composition of the present invention.

Further, the compound represented by general formula (N-1-22) is preferably a compound selected from the group of compounds represented by formula (N-1-22.1) to formula (N-1-22.12), preferably formula (N- The compounds represented by 1-22.1) to (N-1-22.5) are preferably compounds represented by formulae (N-1-22.1) to (N-1-22.4).

[Chemical 39]

The liquid crystal composition of the present invention preferably contains one or more compounds represented by the general formula (L).

The compound represented by the general formula (L) corresponds to a compound whose dielectricity is substantially neutral (the value of Δε is -2 to 2).

However, compounds represented by general formula (i), general formula (N-1d) and general formula (N-1) are excluded.

The compounds represented by the general formula (L) may be used alone or in combination. The types of compounds that can be combined are not particularly limited, and they are appropriately combined and used according to desired properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The kind of compound to be used is one, for example, as one embodiment of the present invention. Or in other embodiment of this invention, it is 2 types, 3 types, 4 types, 5 types, 6 types, 7 types, 8 types, 9 types, 10 types or more.

In the composition of the present invention, the content of the compound represented by the general formula (L) needs to be determined according to solubility at low temperature, transition temperature, electrical reliability, birefringence, process suitability, drip marks, burn-in, and dielectric constant. The required properties such as anisotropy are appropriately adjusted.

The compound represented by the general formula (L) is a so-called non-polar compound in which Δε is around 0. Therefore, the number of polar groups such as halogen atoms in the molecule is preferably 2 or less, preferably 1 or less, and in order to improve the solubility with other liquid crystal compounds, preferably 1, and when the viscosity is considered, it is preferably not replace.

The lower limit of the preferable content of the compound represented by the general formula (L) is 1%, 10%, 20%, 30%, 40%, 50%, 55%, 60% with respect to the total amount of the composition of the present invention. %, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%.

The lower limit of the preferable content of the compounds represented by the general formula (i) and the general formula (L) is 1%, 10%, 20%, 30%, 40%, 50% with respect to the total amount of the composition of the present invention. %, 55%, 60%, 65%, 70%, 75%, 80%. The upper limit of the preferred content is 95%, 85%, 75%, 65%, 55%, 45%, 35%, 25%.

When the viscosity of the composition of the present invention is kept low and a composition with a fast response speed is required, it is preferable that the lower limit value is high and the upper limit value is high. Furthermore, when the Tni of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferable that the lower limit value is high and the upper limit value is high. In addition, when it is desired to increase the dielectric constant anisotropy in order to keep the driving voltage low, it is preferable to lower the above-mentioned lower limit value and lower the upper limit value.

When reliability is important, both R ^L1 and R ^L2 are preferably an alkyl group, when reducing the volatility of the compound is important, an alkoxy group is preferred, and when a viscosity reduction is important, at least one is preferably an alkenyl group.

The number of halogen atoms present in the molecule is preferably 0, 1, 2 or 3, preferably 0 or 1, and when the compatibility with other liquid crystal molecules is important, one is preferred.

When the ring structure to which R ^L1 and R ^L2 are connected is a phenyl group (aromatic), a straight-chain alkyl group having 1 to 5 carbon atoms, and a straight-chain carbon number of 1 to 4 are preferred. alkoxy and alkenyl having 4 to 5 carbon atoms, when the ring structure to which they are connected is a saturated ring structure such as cyclohexane, pyran, and dioxane, straight-chain carbon atoms are preferred. An alkyl group having 1 to 5 carbon atoms, a linear alkoxy group having 1 to 4 carbon atoms, and a linear alkenyl group having 2 to 5 carbon atoms. In order to stabilize the nematic phase, the total of carbon atoms and oxygen atoms when present is preferably 5 or less, and it is preferably linear.

The alkenyl group is preferably selected from groups represented by any one of formula (R1) to formula (R5). (Black dots in each formula represent carbon atoms in the ring structure.)

[Chemical 40]

n ^L1 is preferably 0 when the response speed is important, 2 or 3 is preferable in order to improve the upper limit temperature of the nematic phase, and 1 is preferable in order to achieve a balance between them. In addition, in order to satisfy the properties required as a composition, it is preferable to combine compounds of different values.

A ^L1 , A ^L2 and A ^L3 are preferably aromatic when Δn is required to be increased, and are preferably aliphatic in order to improve the response speed, and each independently represents trans-1,4-cyclohexylene, 1,4-cyclohexylene Phenyl, 2-fluoro-1,4-phenylene, 3-fluoro-1,4-phenylene, 3,5-difluoro-1,4-phenylene, 1,4-cyclohexene base, 1,4-bicyclo[2.2.2]octylene, piperidine-1,4-diyl, naphthalene-2,6-diyl, decahydronaphthalene-2,6-diyl or 1,2, 3,4-tetrahydronaphthalene-2,6-diyl, more preferably represents the following structure,

[Chemical 41]

More preferably, it represents trans-1,4-cyclohexylene or 1,4-phenylene.

Z ^L1 and Z ^L2 are preferably single bonds when importance is attached to the response speed.

The number of halogen atoms in the molecule of the compound represented by the general formula (L) is preferably 0 or 1.

The compound represented by the general formula (L) is preferably a compound selected from the group of compounds represented by the general formulae (L-1) to (L-7).

The compound represented by general formula (L-1) is the following compound.

[Chemical 42]

(In the formula, R ^L11 and R ^L12 each independently represent the same meanings as R ^L1 and R ^L2 in the general formula (L).)

R ^L11 and R ^L12 are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms.

The compound represented by general formula (L-1) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

The lower limit of the preferable content is 1%, 2%, 3%, 5%, 7%, 10% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 40%, 35%, 33%, 30%, 25% with respect to the total amount of the composition of the present invention.

When the viscosity of the composition of the present invention is kept low and a composition with a fast response speed is required, it is preferable that the lower limit value is high and the upper limit value is high. Furthermore, when the Tni of the composition of the present invention is kept high and a composition with good temperature stability is required, it is preferable that the lower limit value is in the middle and the upper limit value is in the middle. In addition, when it is desired to increase the dielectric constant anisotropy in order to keep the driving voltage low, it is preferable that the lower limit value is low and the upper limit value is low. In order to improve the viewing angle characteristics, it is not preferable to increase the upper limit value.

The compound represented by the general formula (L-1) is preferably a compound selected from the group of compounds represented by the general formula (L-1-1).

[Chemical 43]

(wherein R ^L12 represents the same meaning as in the general formula (L-1).)

The compound represented by general formula (L-1-1) is preferably a compound selected from the group of compounds represented by formula (L-1-1.1) to formula (L-1-1.3), preferably formula (L-1- 1.2) or a compound represented by formula (L-1-1.3), particularly preferably a compound represented by formula (L-1-1.3).

[Chemical 44]

The lower limit of the preferable content of the compound represented by formula (L-1-1.3) is 1%, 2%, 3%, 5%, 7%, and 10% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3% with respect to the total amount of the composition of the present invention.

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-2).

[Chemical 45]

(wherein R ^L12 represents the same meaning as in the general formula (L-1).)

The lower limit of the preferable content of the compound represented by the formula (L-1-2) is 1%, 5%, 10%, 15%, 17%, 20%, 23% with respect to the total amount of the composition of the present invention %, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30% with respect to the total amount of the composition of the present invention.

Further, the compound represented by the general formula (L-1-2) is preferably a compound selected from the group of compounds represented by the formula (L-1-2.1) to the formula (L-1-2.4), preferably the formula (L- 1-2.2) to compounds represented by formula (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because it particularly improves the response speed of the composition of the present invention. In addition, when higher Tni is required than the response speed, the compound represented by the formula (L-1-2.3) or the formula (L-1-2.4) is preferably used. In order to make the solubility at low temperature favorable, the content of the compound represented by formula (L-1-2.3) and formula (L-1-2.4) is not preferably 30% or more.

[Chemical 46]

The lower limit of the preferable content of the compound represented by the formula (L-1-2.2) is 10%, 15%, 18%, 20%, 23%, 25%, 27% with respect to the total amount of the composition of the present invention %, 30%, 33%, 35%, 38%, 40%. The upper limit of the preferred content is 60%, 55%, 50%, 45%, 43%, 40%, 38%, 35%, 32%, 30%, 27%, 25%, 22%.

The lower limit of the preferable content of the total of the compound represented by the formula (L-1-1.3) and the compound represented by the formula (L-1-2.2) is 10%, 15% with respect to the total amount of the composition of the present invention. %, 20%, 25%, 27%, 30%, 35%, 40%. The upper limit of the preferred content is 60%, 55%, 50%, 45%, 43%, 40%, 38%, 35%, 32%, 30%, 27%, 25%, 22%.

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-3).

[Chemical 47]

(In the formula, R ^L13 and R ^L14 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)

R ^L13 and R ^L14 are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms.

The lower limit of the preferable content of the compound represented by the formula (L-1-3) is 1%, 5%, 10%, 13%, 15%, 17%, 20% with respect to the total amount of the composition of the present invention. %, 23%, 25%, 30%. The upper limit of the preferred content relative to the total amount of the composition of the present invention is 60%, 55%, 50%, 45%, 40%, 37%, 35%, 33%, 30%, 27%, 25%, 23%, 20%, 17%, 15%, 13%, 10%.

Further, the compound represented by the general formula (L-1-3) is preferably a compound selected from the group of compounds represented by the formula (L-1-3.1) to the formula (L-1-3.12), preferably the formula (L- 1-3.1), a compound represented by formula (L-1-3.3) or formula (L-1-3.4). In particular, the compound represented by the formula (L-1-3.1) is preferable because it particularly improves the response speed of the composition of the present invention. In addition, when higher Tni is required than the response speed, it is preferable to use formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and formula (L-1-3.12) represented compound. The total content of the compounds represented by the formula (L-1-3.3), the formula (L-1-3.4), the formula (L-1-3.11) and the formula (L-1-3.12) in order to improve the solubility at low temperature It is not preferable to make it 20% or more.

[Chemical 48]

The lower limit of the preferable content of the compound represented by the formula (L-1-3.1) is 1%, 2%, 3%, 5%, 7%, 10%, 13% with respect to the total amount of the composition of the present invention %, 15%, 18%, 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, 8%, 7%, 6% with respect to the total amount of the composition of the present invention.

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-4) and/or (L-1-5).

[Chemical 49]

(In the formula, R ^L15 and R ^L16 each independently represent an alkyl group having 1 to 8 carbon atoms or an alkoxy group having 1 to 8 carbon atoms.)

R ^L15 and R ^L16 are preferably linear alkyl groups having 1 to 5 carbon atoms, linear alkoxy groups having 1 to 4 carbon atoms, and linear alkenyl groups having 2 to 5 carbon atoms.

The lower limit of the preferable content of the compound represented by the formula (L-1-4) is 1%, 5%, 10%, 13%, 15%, 17%, 20% with respect to the total amount of the composition of the present invention. %. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, 13%, 10% with respect to the total amount of the composition of the present invention.

The lower limit of the preferable content of the compound represented by formula (L-1-5) is 1%, 5%, 10%, 13%, 15%, 17%, 20% with respect to the total amount of the composition of the present invention. %. The upper limit of the preferable content is 25%, 23%, 20%, 17%, 15%, 13%, 10% with respect to the total amount of the composition of the present invention.

Further, the compounds represented by general formulae (L-1-4) and (L-1-5) are preferably selected from the group of compounds represented by formulae (L-1-4.1) to (L-1-5.3) The compound is preferably a compound represented by formula (L-1-4.2) or formula (L-1-5.2).

[Chemical 50]

The lower limit of the preferable content of the compound represented by the formula (L-1-4.2) is 1%, 2%, 3%, 5%, 7%, 10%, 13% with respect to the total amount of the composition of the present invention %, 15%, 18%, 20%. The upper limit of the preferable content is 20%, 17%, 15%, 13%, 10%, 8%, 7%, 6% with respect to the total amount of the composition of the present invention.

The preferred combination is selected from formula (L-1-1.3), formula (L-1-2.2), formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4), formula (L-1-3.11) and the compounds represented by the formula (L-1-3.12) are preferably two or more compounds selected from the group consisting of formula (L-1-1.3), formula (L-1-2.2), Two or more compounds among the compounds represented by formula (L-1-3.1), formula (L-1-3.3), formula (L-1-3.4) and formula (L-1-4.2), the compounds of which The lower limit of the preferable content of the total content is 1%, 2%, 3%, 5%, 7%, 10%, 13%, 15%, 18%, 20%, with respect to the total amount of the composition of the present invention, 23%, 25%, 27%, 30%, 33%, 35%, the upper limit is 80%, 70%, 60%, 50%, 45%, 40% relative to the total amount of the composition of the present invention, 37%, 35%, 33%, 30%, 28%, 25%, 23%, 20%. When the reliability of the composition is important, it is preferable to combine two or more compounds selected from the group consisting of compounds represented by formula (L-1-3.1), formula (L-1-3.3) and formula (L-1-3.4)). When the response speed of the composition is important, it is preferable to combine two or more compounds selected from the compounds represented by formula (L-1-1.3) and formula (L-1-2.2).

The compound represented by general formula (L-1) is preferably a compound selected from the group of compounds represented by general formula (L-1-6).

[Chemical 51]

(wherein R ^L17 and R ^L18 each independently represent a methyl group or a hydrogen atom.)

The lower limit of the preferable content of the compound represented by the formula (L-1-6) is 1%, 5%, 10%, 15%, 17%, 20%, 23% with respect to the total amount of the composition of the present invention %, 25%, 27%, 30%, 35%. The upper limit of the preferable content is 60%, 55%, 50%, 45%, 42%, 40%, 38%, 35%, 33%, 30% with respect to the total amount of the composition of the present invention.

Furthermore, the compound represented by general formula (L-1-6) is preferably a compound selected from the group of compounds represented by formula (L-1-6.1) to formula (L-1-6.3).

[Chemical 52]

In order to ensure the balance between response speed and reliability, the compound represented by the general formula (L-1) is preferably (L-1-1), (L-1-2) and/or (L-1-3), especially (L-1-2) and/or (L-1-3) are preferred.

The compound represented by general formula (L-2) is the following compound.

[Chemical 53]

(In the formula, R ^L21 and R ^L22 each independently represent the same meanings as R ^L1 and R ^L2 in the general formula (L).)

R ^L21 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L22 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkenyl group having 1 carbon atoms. ~4 alkoxy.

The compound represented by the general formula (L-2) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

When the solubility at low temperature is important, the effect is good when the content is set more, and the effect is good when the content is set less when the response speed is emphasized. Furthermore, in order to improve drip marks and burn-in properties, it is preferable to set the content range in the middle.

The lower limit of the preferable content of the compound represented by formula (L-2) is 1%, 2%, 3%, 5%, 7%, and 10% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3% with respect to the total amount of the composition of the present invention.

Further, the compound represented by general formula (L-2) is preferably a compound selected from the group of compounds represented by formula (L-2.1) to formula (L-2.6), preferably selected from formula (L-2.1), formula The compound of the compound group represented by (L-2.3), formula (L-2.4) and formula (L-2.6) is preferably selected from the compound group represented by formula (L-2.3) and formula (L-2.4) compound.

[Chemical 54]

The compound represented by the general formula (L-3) is the following compound.

[Chemical 55]

(In the formula, R ^L31 and R ^L32 each independently represent the same meanings as R ^L1 and R ^L2 in the general formula (L).)

R ^L31 and R ^L32 are each independently preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms.

The compound represented by the general formula (L-3) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

The lower limit of the preferable content of the compound represented by formula (L-3) is 1%, 2%, 3%, 5%, 7%, and 10% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content is 20%, 15%, 13%, 10%, 8%, 7%, 6%, 5%, 3% with respect to the total amount of the composition of the present invention.

When a high birefringence is to be obtained, the effect is good if the content is set to be large, and conversely, when high Tni is emphasized, the effect is good when the content is set to be small. Furthermore, in order to improve drip marks and burn-in characteristics, it is preferable to set the content range in the middle.

Further, the compound represented by general formula (L-3) is preferably a compound selected from the group of compounds represented by formula (L-3.1) to formula (L-3.6), preferably selected from formula (L-3.1), formula The compound of the compound group represented by (L-3.3), formula (L-3.5) or formula (L-3.6) is preferably a compound represented by formula (L-3.1).

[Chemical 56]

The compound represented by general formula (L-4) is the following compound.

[Chemical 57]

(In the formula, R ^L41 and R ^L42 each independently represent the same meanings as R ^L1 and R ^L2 in the general formula (L).)

R ^L41 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L42 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkenyl group having 1 carbon atoms. ~4 alkoxy. )

The compound represented by general formula (L-4) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-4) needs to be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process adaptability, drip marks, burn-in, dielectric The properties required such as electric constant anisotropy are appropriately adjusted.

The lower limit of the preferable content of the compound represented by formula (L-4) is 1%, 2%, 3%, 5%, 7%, 10%, 14%, relative to the total amount of the composition of the present invention, 16%, 20%, 23%, 26%, 30%, 35%, 40%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-4) is 50%, 40%, 35%, 30%, 20%, 15%, 10%, 5%.

The compound represented by general formula (L-4) is preferably a compound represented by formula (L-4.1) to formula (L-4.3), for example.

[Chemical 58]

The compound represented by the formula (L-4.1) may be contained, or the compound represented by the formula (L-4.2) may be contained according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., Or it may contain both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2), or may contain all the compounds represented by the formula (L-4.1) to the formula (L-4.3) . The lower limit of the preferable content of the compound represented by formula (L-4.1) or formula (L-4.2) is 3%, 5%, 7%, 9%, 11% with respect to the total amount of the composition of the present invention , 12%, 13%, 18%, 21%, the preferred upper limit is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10 %,8%.

In the case where both the compound represented by the formula (L-4.1) and the compound represented by the formula (L-4.2) are contained, the lower limit of the preferable content of the two compounds with respect to the total amount of the composition of the present invention is 15%, 19%, 24%, 30%, the preferred upper limit is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (L-4) is, for example, preferably a compound represented by formula (L-4.4) to (L-4.6), and preferably a compound represented by formula (L-4.4).

[Chemical 59]

The compound represented by the formula (L-4.4) may be contained, or the compound represented by the formula (L-4.5) may be contained according to the required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, etc., Or both the compound represented by formula (L-4.4) and the compound represented by formula (L-4.5) may be contained.

The lower limit of the preferable content of the compound represented by formula (L-4.4) or formula (L-4.5) is 3%, 5%, 7%, 9%, 11% with respect to the total amount of the composition of the present invention , 12%, 13%, 18%, 21%. Preferred upper limits are 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%, 10%, 8%.

In the case where both the compound represented by the formula (L-4.4) and the compound represented by the formula (L-4.5) are contained, the lower limit of the preferable content of both compounds with respect to the total amount of the composition of the present invention is 15%, 19%, 24%, 30%, the preferred upper limit is 45%, 40%, 35%, 30%, 25%, 23%, 20%, 18%, 15%, 13%.

The compound represented by general formula (L-4) is preferably a compound represented by formula (L-4.7) to (L-4.10), and particularly preferably a compound represented by formula (L-4.9).

[Chemical 60]

The compound represented by general formula (L-5) is the following compound.

[Chemical 61]

(In the formula, R ^L51 and R ^L52 each independently represent the same meanings as R ^L1 and R ^L2 in the general formula (L).)

R ^L51 is preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, and R ^L52 is preferably an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 4 to 5 carbon atoms, or an alkenyl group having 1 carbon atoms. ~4 alkoxy.

The compound represented by the general formula (L-5) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-5) needs to be based on solubility at low temperature, transition temperature, electrical reliability, birefringence, process adaptability, drip marks, burn-in, dielectric The properties required such as electric constant anisotropy are appropriately adjusted.

The lower limit of the preferable content of the compound represented by the formula (L-5) is 1%, 2%, 3%, 5%, 7%, 10%, 14%, relative to the total amount of the composition of the present invention, 16%, 20%, 23%, 26%, 30%, 35%, 40%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-5) is 50%, 40%, 35%, 30%, 20%, 15%, 10%, 5%.

The compound represented by general formula (L-5) is preferably a compound represented by formula (L-5.1) or formula (L-5.2), and particularly preferably a compound represented by formula (L-5.1).

The lower limit of the preferable content of these compounds is 1%, 2%, 3%, 5%, 7% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, 9%.

[Chemical 62]

The compound represented by general formula (L-5) is preferably a compound represented by formula (L-5.3) or formula (L-5.4).

The lower limit of the preferable content of these compounds is 1%, 2%, 3%, 5%, 7% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, 9%.

[Chemical 63]

The compound represented by the general formula (L-5) is preferably a compound selected from the group of compounds represented by the formula (L-5.5) to the formula (L-5.7), particularly preferably the compound represented by the formula (L-5.7) .

The lower limit of the preferable content of these compounds is 1%, 2%, 3%, 5%, 7% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, 9%.

[Chemical 64]

The compound represented by general formula (L-6) is the following compound.

[Chemical 65]

(In the formula, R ^L61 and R ^L62 each independently represent the same meanings as R ^L1 and R ^L2 in the general formula (L), and ^XL61 and ^XL62 each independently represent a hydrogen atom or a fluorine atom.)

R ^L61 and R ^L62 are each independently preferably an alkyl group having 1 to 5 carbon atoms or an alkenyl group having 2 to 5 carbon atoms, preferably one of ^XL61 and ^XL62 is a fluorine atom and the other is a hydrogen atom.

The compound represented by the general formula (L-6) may be used alone or in combination of two or more. The types of compounds that can be combined are not particularly limited, and they can be used in combination according to required properties such as solubility at low temperature, transition temperature, electrical reliability, and birefringence. The types of compounds to be used are, for example, one, two, three, four, five or more types as one embodiment of the present invention.

The lower limit of the preferable content of the compound represented by formula (L-6) is 1%, 2%, 3%, 5%, 7%, 10%, 14%, relative to the total amount of the composition of the present invention, 16%, 20%, 23%, 26%, 30%, 35%, 40%. With respect to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-6) is 50%, 40%, 35%, 30%, 20%, 15%, 10%, 5%. When the emphasis is placed on increasing Δn, the content is preferably large, and when the emphasis is placed on precipitation at low temperature, the content is preferably small.

The compound represented by general formula (L-6) is preferably a compound represented by formula (L-6.1) to formula (L-6.9).

[Chemical 66]

The types of compounds that can be combined are not particularly limited, but one to three of these compounds are preferably contained, and one to four are more preferably contained. In addition, the broad molecular weight distribution of the selected compound is also effective for solubility. Therefore, for example, it is preferable to select one compound represented by the formula (L-6.1) or (L-6.2), and select one from the formula (L-6.4) or ( One selected from the compounds represented by the formula (L-6.5), one selected from the compounds represented by the formula (L-6.6) or formula (L-6.7), one selected from the compounds represented by the formula (L-6.8) or (L-6.9) One compound is selected among the compounds shown, and these are combined as appropriate. Among these, compounds represented by formula (L-6.1), formula (L-6.3), formula (L-6.4), formula (L-6.6) and formula (L-6.9) are preferably included.

Further, the compound represented by the general formula (L-6) is preferably, for example, the compound represented by the formula (L-6.10) to the formula (L-6.17), and among them, the compound represented by the formula (L-6.11) is preferable. .

[Chemical 67]

The lower limit of the preferable content of these compounds is 1%, 2%, 3%, 5%, 7% with respect to the total amount of the composition of the present invention. The upper limit of the preferable content of these compounds is 20%, 15%, 13%, 10%, 9%.

The compound represented by general formula (L-7) is the following compound.

[Chemical 68]

(wherein, R ^L71 and R ^L72 independently represent the same meanings as R ^L1 and R ^L2 in the general formula (L), respectively, and A ^L71 and A ^L72 independently represent the same meanings as A ^L2 and R L2 in the general formula (L) A ^L3 has the same meaning, the hydrogen atoms on A ^L71 and A ^L72 can be independently substituted by a fluorine atom, Z ^L71 has the same meaning as Z ^L2 in the general formula (L), and X ^L71 and X ^L72 respectively independently represent fluorine atom or hydrogen atom.)

In the formula, R ^L71 and R ^L72 are preferably independently an alkyl group having 1 to 5 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, or an alkoxy group having 1 to 4 carbon atoms, and A ^L71 and A ^L72 are preferably Each independently is 1,4-cyclohexylene or 1,4-phenylene, the hydrogen atoms on A ^L71 and A ^L72 can be substituted by fluorine atoms, respectively, Z ^L71 is preferably a single bond or COO-, preferably a single bond , ^XL71 and ^XL72 are preferably hydrogen atoms.

The kinds of compounds that can be combined are not particularly limited, and are combined according to required properties such as solubility at low temperature, transition temperature, electrical reliability, birefringence, and the like. The types of compounds to be used are, for example, one, two, three, or four types as one embodiment of the present invention.

In the composition of the present invention, the content of the compound represented by the general formula (L-7) needs to be determined according to solubility at low temperature, transition temperature, electrical reliability, birefringence, process adaptability, drip marks, burn-in, dielectric The properties required such as electric constant anisotropy are appropriately adjusted.

The lower limit of the preferable content of the compound represented by the formula (L-7) is 1%, 2%, 3%, 5%, 7%, 10%, 14%, relative to the total amount of the composition of the present invention, 16%, 20%. Relative to the total amount of the composition of the present invention, the upper limit of the preferred content of the compound represented by formula (L-7) is 30%, 25%, 23%, 20%, 18%, 15%, 10%, 5%.

When the composition of the present invention is expected to have a high Tni, the content of the compound represented by the formula (L-7) is preferably increased, and when a low-viscosity embodiment is expected, the content is preferably decreased .

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.1) to (L-7.4), and preferably a compound represented by formula (L-7.2).

[Chemical 69]

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.11) to (L-7.13), and preferably a compound represented by formula (L-7.11).

[Chemical 70]

Furthermore, the compound represented by general formula (L-7) is a compound represented by formula (L-7.21) to formula (L-7.23). The compound represented by formula (L-7.21) is preferable.

[Chemical 71]

Further, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.31) to formula (L-7.34), preferably formula (L-7.31) or/and formula (L-7.32) represented compound.

[Chemical 72]

Further, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.41) to formula (L-7.44), preferably formula (L-7.41) or/and formula (L-7.42) represented compound.

[Chemical 73]

Furthermore, the compound represented by general formula (L-7) is preferably a compound represented by formula (L-7.51) to formula (L-7.53).

[Chemical 74]

The total amount of compounds represented by general formula (i), general formula (ii), general formula (N-1d), general formula (N-1) and general formula (L) with respect to the total amount of the composition of the present invention The lower limit of the preferred content is 80%, 85%, 88%, 90%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, 100%. The upper limit of the preferred content is 100%, 99%, 98%, and 95%.

The lower limit of the preferable content of the total of the compounds represented by the general formula (i) in the neutral compound (the compound represented by the general formula (i) and the compound represented by the general formula (L)) is 2%, 4 %, 6%, 8%, 10%, 12%, 14%, 16%. Preferred upper limits are 30%, 25%, 20%, 18%, 16%, 14%, 12%.

The lower limit of the preferable content of the total of the compounds represented by general formula (i) and general formula (L) is 5%, 10%, 15%, 20%, 25% with respect to the total amount of the composition of the present invention . The upper limit of the preferred content is 70%, 60%, 55%, 50%, 45%, 40%.

When the response speed is important, it is preferable to include a compound having an alkenyl group. With respect to the total amount of the composition of the present invention, the upper limit of the total preferable content of the compound having an alkenyl group is 95%, 90%, 85%, 80%, 75%, 70%, 65%, 60%, 55%, 50%, 45%, 40%, 35%, 30%, 25%, 20%, 15%, 10%, 5%.

When considering reliability, it is preferable to reduce the number of compounds having an alkenyl group. With respect to the total amount of the composition of the present invention, the upper limit of the total preferable content of the alkenyl group-containing compound is 30%, 25%, 20%, 15%, 13%, 10%, 8%, 5%, 3%, 2%, 1%, it is preferable not to contain substantially.

Appropriate physical property values are required to be designed as basic properties for liquid crystal compositions used for liquid crystal display elements. As examples, nematic-isotropic liquid phase transition temperature (T _ni ), refractive index anisotropy (Δn), dielectric constant anisotropy (Δε), rotational viscosity (γ ₁ ), and various elastic properties can be cited Constants (flexural elastic constant: K ₁₁ , torsional elastic constant: K ₂₂ , bending elastic constant: K ₃₃ , their average value Kave.).

In order to exhibit low γ ₁ , it is preferable to contain a compound represented by the general formula (L-1), and it is preferable to contain the general formula (L-1-1), the general formula (L-1-2) and/or the general formula (L- Compounds represented by 1-3).

The compound represented by general formula (L-1-1) is preferably a compound selected from the group of compounds represented by formula (L-1-1.1) to formula (L-1-1.3), preferably formula (L-1- 1.2) or a compound represented by formula (L-1-1.3), particularly preferably a compound represented by formula (L-1-1.3).

The compound represented by general formula (L-1-2) is preferably a compound selected from the group of compounds represented by formula (L-1-2.1) to formula (L-1-2.4), preferably formula (L-1- 2.2) to compounds represented by formula (L-1-2.4). In particular, the compound represented by the formula (L-1-2.2) is preferable because it improves the response speed of the composition of the present invention.

The compound represented by general formula (L-1-3) is preferably a compound selected from the group of compounds represented by formula (L-1-3.1) to formula (L-1-3.12), preferably formula (L-1- 3.1), a compound represented by formula (L-1-3.3) or formula (L-1-3.4). In particular, the compound represented by the formula (L-1-3.1) is preferable because it improves the response speed of the composition of the present invention.

In order to design a liquid crystal composition exhibiting an appropriate Δn, it is preferable to contain an appropriate amount of a compound exhibiting a large Δn in addition to the compound represented by the general formula (L-1) exhibiting a small Δn. It is preferable to contain the compound represented by general formula (L-3) and/or general formula (L-5) as a neutral dielectric compound which shows large Δn.

The compound represented by general formula (L-3) is preferably a compound selected from the group of compounds represented by formula (L-3.1) to formula (L-3.6), preferably selected from formula (L-3.1), formula (L The compound of the compound group represented by -3.3), formula (L-3.5) or formula (L-3.6) is preferably a compound represented by formula (L-3.1).

The compound represented by general formula (L-5) is preferably a compound represented by formula (L-5.1) or formula (L-5.2), and particularly preferably a compound represented by formula (L-5.1).

In order to design a liquid crystal composition exhibiting an appropriate Δε, it is preferable to contain an appropriate amount of a compound exhibiting a large Δε in addition to the compound represented by the general formula (L-1) exhibiting a small Δn. As a compound showing a large Δε, it is preferable to contain a compound represented by general formula (N-1d) and/or general formula (N-1), and it is preferable to contain general formula (N-1-10), general formula (N-1- 11), general formula (N-1-1), general formula (N-1-2), general formula (N-1-3), general formula (N-1-4), general formula (N-1- 5), the compound represented by the general formula (N-1-18) and/or the general formula (N-1-22).

The compound represented by general formula (N-1-10) is preferably a compound selected from the group of compounds represented by formula (N-1-10.1) to formula (N-1-10.21), preferably formula (N-1- 10.1) to (N-1-10.5), compounds represented by formula (N-1-10.20) and formula (N-1-10.21), preferably formula (N-1-10.1) and formula (N-1-10.2) ), compounds represented by formula (N-1-10.20) and formula (N-1-10.21), preferably compounds represented by formula (N-1-10.1) and formula (N-1-10.2), preferably formula ( A compound represented by N-1-10.2).

The compound represented by general formula (N-1-11) is preferably a compound selected from the group of compounds represented by formula (N-1-11.1) to formula (N-1-11.14), preferably formula (N-1- 11.2), compounds represented by formula (N-1-11.4), formula (N-1-11.11) and (N-1-11.14).

The compound represented by general formula (N-1-1) is preferably a compound selected from the group of compounds represented by formula (N-1-1.1) to formula (N-1-1.23), preferably formula (N-1- The compounds represented by 1.1) to (N-1-1.4) are preferably compounds represented by formula (N-1-1.1) and formula (N-1-1.3).

The compound represented by general formula (N-1-2) is preferably a compound selected from the group of compounds represented by formula (N-1-2.1) to formula (N-1-2.22), preferably formula (N-1- 2.3) to those represented by formula (N-1-2.7), formula (N-1-2.10), formula (N-1-2.11), formula (N-1-2.13) and formula (N-1-2.20) The compound is preferably a compound represented by the formula (N-1-2.4).

The compound represented by general formula (N-1-3) is preferably a compound selected from the group of compounds represented by formula (N-1-3.1) to formula (N-1-3.21), preferably formula (N-1- 3.1) to (N-1-3.7) and compounds represented by formula (N-1-3.21), preferably formula (N-1-3.1), formula (N-1-3.2), formula (N-1-3.3) ), compounds represented by formula (N-1-3.4) and formula (N-1-3.6).

The compound represented by general formula (N-1-4) is preferably a compound selected from the group of compounds represented by formula (N-1-4.1) to formula (N-1-4.14), preferably formula (N-1- The compounds represented by 4.1) to (N-1-4.4) are preferably compounds represented by formula (N-1-4.1), formula (N-1-4.2) and formula (N-1-4.4).

The compound represented by general formula (N-1-5) is preferably a compound selected from the group of compounds represented by formula (N-1-5.1) to formula (N-1-5.6), preferably formula (N-1-5.1) ), compounds represented by formula (N-1-5.2) and formula (N-1-5.4).

The compound represented by general formula (N-1-18) is preferably a compound selected from the group of compounds represented by formula (N-1-18.1) to formula (N-1-18.5), preferably formula (N-1- The compounds represented by 18.1) to (N-1-11.3) are preferably compounds represented by formula (N-1-18.2) and formula (N-1-18.3).

The compound represented by general formula (N-1-22) is preferably a compound selected from the group of compounds represented by formula (N-1-22.1) to formula (N-1-22.12), preferably formula (N-1- The compounds represented by 22.1) to (N-1-22.5) are preferably compounds represented by formulae (N-1-22.1) to (N-1-22.4).

In the case of increasing Δn, it is preferable to contain a formula selected from the group consisting of general formula (N-1-3), general formula (N-1-4), general formula (N-1-5) and general formula (N-1-18) It is especially preferable to contain 2 or more types of compounds of 1 type or 2 or more types of the compound group shown.

It is preferable to contain two or more compounds selected from the group of compounds represented by the general formula (N-1-3), the general formula (N-1-4) and the general formula (N-1-18), and it is preferable to contain the compound selected from the general formula (N-1-18). It is preferable that two or more kinds of compounds in the compound group represented by formula (N-1-3) and general formula (N-1-4) contain two or more kinds of compounds represented by general formula (N-1-3).

The upper limit of the preferable content of the compound represented by the general formula (N-1d) and the compound represented by the general formula (N-1) and having an alkenyl group in total with respect to the total amount of the composition of the present invention is 20%, 18%, 15%, 13%, 10%, 8%, 5%, 3%, 2%, 1%, preferably substantially no content.

The composition of the present invention preferably does not contain a compound having a structure in which oxygen atoms, such as a peracid (-CO-OO-) structure, are connected to each other in the molecule.

When importance is attached to the reliability and long-term stability of the composition, the content of the compound having a carbonyl group is preferably 5% or less, more preferably 3% or less, and further preferably 1% or less with respect to the total mass of the composition. , most preferably not substantially contained.

When the stability under UV irradiation is emphasized, the content of the chlorine atom-substituted compound is preferably 15% or less, preferably 10% or less, preferably 8% or less, more preferably 15% or less with respect to the total mass of the composition. It is 5% or less, preferably 3% or less, and more preferably not substantially contained.

It is preferable to increase the content of the compound whose ring structures in the molecule are all 6-membered rings, and the content of the compound whose ring structures are all 6-membered rings in the molecule is preferably 80% or more with respect to the total mass of the composition, more preferably 80% or more. It is 90% or more, more preferably 95% or more, and most preferably, the composition is composed of substantially only compounds in which all of the ring structures in the molecule are 6-membered rings.

In order to improve the tilt stability of the composition, it is preferable to increase the content of the compound whose side chain is an alkyl group and an alkoxy group, and the content of the compound whose side chain is an alkyl group and an alkoxy group is preferably 85 with respect to the total mass of the composition. % or more, preferably 87% or more, preferably 90% or more, preferably 93% or more, preferably 95% or more, preferably 98% or more, and more preferably substantially 100%. Substantially 100% means 100% excluding polymeric compounds, stabilizers and additionally mixed impurities.

In order to suppress deterioration due to oxidation of the composition, the content of the compound having a cyclohexenylene group as a ring structure is preferably reduced, and the content of the compound having a cyclohexenylene group is preferably 10% with respect to the total mass of the composition. Hereinafter, it is preferably 8% or less, more preferably 5% or less, preferably 3% or less, and further preferably not substantially contained.

When emphasis is placed on the improvement of viscosity and improvement of Tni, it is preferable to reduce the content of the compound having 2-methylbenzene-1,4-diyl in which the hydrogen atom can be substituted by halogen in the molecule. The content of the phenylbenzene-1,4-diyl compound is preferably 10% or less, preferably 8% or less, more preferably 5% or less, preferably 3% or less, based on the total mass of the composition. More preferably, it does not contain substantially.

In the present application, it means that it does not contain substantially except the substance which is not contained intentionally.

In the case where the compound contained in the composition of the first embodiment of the present invention has an alkenyl group as a side chain, when the aforementioned alkenyl group is connected to cyclohexane, the number of carbon atoms of the alkenyl group is preferably 2 to 5, and when the aforementioned alkenyl group is attached to cyclohexane When the alkenyl group is connected to benzene, the number of carbon atoms of the alkenyl group is preferably 4 to 5, and it is preferable that the unsaturated bond of the alkenyl group is not directly connected to the benzene.

The average elastic constant (K _AVG ) of the liquid crystal composition used in the present invention is preferably 10 to 25, and as its lower limit value, preferably 10, preferably 10.5, preferably 11, preferably 11.5, preferably 12, preferably 12.3, preferably 12.5, preferably 12.8 , preferably 13, preferably 13.3, preferably 13.5, preferably 13.8, preferably 14, preferably 14.3, preferably 14.5, preferably 14.8, preferably 15, preferably 15.3, preferably 15.5, preferably 15.8, preferably 16, preferably 16.3, preferably 16.5, preferably 16.8, preferably 17, preferably 17.3, preferably 17.5, preferably 17.8, preferably 18, as its upper limit, preferably 25, preferably 24.5, preferably 24, preferably 23.5, preferably 23, preferably 22.8, preferably 22.5, preferably 22.3, preferably 22, preferably 21.8, preferably 21.5, preferably 21.3, preferably 21, preferably 20.8, preferably 20.5, preferably 20.3, preferably 20, preferably 19.8, preferably 19.5, preferably 19.3, preferably 19, preferably 18.8, preferably 18.5, preferably 18.3, preferably 18, preferably 17.8, preferably 17.5 , preferably 17.3, preferably 17. When emphasis is placed on reducing power consumption, it is effective to suppress the amount of light from the backlight, and it is preferable to increase the transmittance of light in the liquid crystal display _element . When emphasis is placed on the improvement of response speed and contrast, it is preferable to set the value of K _AVG to be higher.

The composition of the present invention may contain one kind or two or more kinds of polymerizable compounds in order to produce a liquid crystal display element of a vertical alignment type PSA mode, a vertical alignment type PSVA mode, a lateral electric field type PSA mode, or a lateral electric field type PSVA mode, etc. .

The liquid crystal composition of the present invention preferably contains the polymerizable compound represented by the general formula (II).

[Chemical 75]

(wherein, R ²⁰¹ , R ²⁰² , R ²⁰³ , R ²⁰⁴ , R ²⁰⁵ , R ²⁰⁶ , R ²⁰⁷ , R ²⁰⁸ , R ²⁰⁹ and R ²¹⁰ each independently represent P ²¹ -S ²¹ -, which may be substituted by a fluorine atom. Any of an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 18 carbon atoms that may be substituted by a fluorine atom, a fluorine atom or a hydrogen atom,

P ²¹ each independently represents a polymerizable group selected from formula (R-1) to formula (R-9),

[Chemical 76]

(in the formula, R ¹¹ , R ¹² , R ¹³ , R ¹⁴ and R ¹⁵ each independently represent any one of an alkyl group having 1 to 5 carbon atoms, a fluorine atom or a hydrogen atom, m ^r5 , m ^r7 , n ^r5 and n ^r7 independently represent 0, 1, or 2.)

S ²¹ represents a single bond or an alkylene group having 1 to 15 carbon atoms, and one or more -CH ₂ - in the alkylene group may be replaced by -O-, -OCO- or -O-, -OCO- or -COO- substituted,

n ²¹ means 0, 1 or 2,

A ²¹ represents a group selected from the group consisting of,

(a) 1,4-cyclohexylene group (One -CH ₂ - or two or more non-adjacent -CH ₂ - present in this group may be substituted with -O-.)

(b) 1,4-phenylene (1 -CH= or non-adjacent 2 or more -CH= present in this group may be substituted by -N=.) and

(c) Naphthalene-2,6-diyl, 1,2,3,4-tetrahydronaphthalene-2,6-diyl or decahydronaphthalene-2,6-diyl (naphthalene-2,6-diyl Or one -CH= or two or more non-adjacent -CH= present in 1,2,3,4-tetrahydronaphthalene-2,6-diyl may be substituted by -N=.)

The above group (a), group (b) and group (c) may be independently selected from an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, halogen, cyano, nitro base or P ²¹ -S ²¹ - substituted,

The general formula (II) has at least one or more P ²¹ -S ²¹ - in one molecule,

L ²¹ represents a single bond, -OCH ₂ -, -CH ₂ O-, -C ₂ H ₄ -, -OC ₂ H ₄ O-, -COO-, -OCO-, -CH=CR ^a -COO-, - CH=CR ^a -OCO-, -COO-CR ^a =CH-, -OCO-CR ^a =CH-, -(CH ₂ ) _z -COO-, -(CH ₂ ) _z -OCO-, -OCO-( CH ₂ ) _z -, -COO-(CH ₂ ) _z -, -CH=CH-, -CF ₂ O-, -OCF ₂ - or -C≡C- (wherein, R ^a each independently represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, in the above formula, z each independently represents an integer of 1 to 4.),

When there are a plurality of P ²¹ , S ²¹ , and A ²¹ , they may be the same or different. )

In the general formula (II), the compound represented by the general formula (II) preferably has 1 or more P ²¹ -S ²¹ -, preferably 4 or less P ²¹ -S ²¹ - in one molecule of the compound represented by the general formula (II) , the number of P ²¹ -S ²¹ - present in one molecule of the general formula (II) is preferably 1 or more and 4 or less, more preferably 1 or more and 3 or less, and the number of P 21 -S 21 - in the molecule of the compound represented by the general formula (II) is preferably 1 or more and 4 or less. The number of P ²¹ -S ²¹ - is particularly preferably 2 or 3.

That is, the compound represented by the general formula (II) is a structure in which at least two benzene rings are connected to the ring A ²¹ as needed, and the plurality of benzene rings and the ring A ²¹ have at least one P ²¹ -S ²¹ - , the compound represented by the general formula (II) exhibits the function and effect as a polymerizable compound.

In the above general formula (II), one or more selected from the group consisting of R ²⁰¹ , R ²⁰² , R ²⁰³ , R ²⁰⁴ , R ²⁰⁵ , R ²⁰⁶ , R ²⁰⁷ , R ²⁰⁸ , R ²⁰⁹ and R ²¹⁰ are In the case of P ²¹ -S ²¹ -, any one or two or more of R ²⁰¹ , R ²⁰² , R ²⁰⁴ , R ²⁰⁷ , R ²⁰⁹ or R ²¹⁰ are preferably P ²¹ -S ²¹ -, more preferably R ²⁰¹ and R ²¹⁰ is P ²¹ -S ²¹ -.

In the above general formula (II), R ²⁰¹ and R ²¹⁰ are preferably independently P ²¹ -S ²¹ -, in this case, R ²⁰¹ and R ²¹⁰ may be the same P ²¹ -S ²¹ -, or may be different P ²¹ -S ^21- .

In the above general formula (II), R ²⁰¹ , R ²⁰² , R ²⁰³ , R ²⁰⁴ , R ²⁰⁵ , R ²⁰⁶ , R ²⁰⁷ , R ²⁰⁸ , R ²⁰⁹ and R ²¹⁰ independently represent P ²¹ -S ²¹ -, which may be Any of an alkyl group having 1 to 18 carbon atoms substituted by a fluorine atom, an alkoxy group having 1 to 18 carbon atoms that may be substituted by a fluorine atom, a fluorine atom, or a hydrogen atom, in this case, the aforementioned alkyl group and alkoxy groups preferably have 1-16 carbon atoms, more preferably 1-10, still more preferably 1-8, still more preferably 1-6, still more preferably 1-4, particularly preferably 1-3 . In addition, the above-mentioned alkyl group and alkoxy group may be linear or branched, but linear is particularly preferable.

In the above general formula (II), R ²⁰² , R ²⁰³ , R ²⁰⁴ , R ²⁰⁵ , R ²⁰⁶ , R ²⁰⁷ , R ²⁰⁸ and R ²⁰⁹ are preferably independently P ²¹ -S ²¹ - and those having 1 to 3 carbon atoms. An alkyl group, a fluorine atom or a hydrogen atom is more preferably P ²¹ -S ²¹ -, a fluorine atom or a hydrogen atom, more preferably a fluorine atom or a hydrogen atom.

P ²¹ is preferably the formula (R-1), more preferably an acryloyl group or a methacryloyl group, and still more preferably a methacryloyl group.

S ²¹ is preferably a single bond or an alkylene group having 1 to 3 carbon atoms, more preferably a single bond.

In the above general formula (II), n ²¹ is preferably 0 or 1.

In the above general formula (II), A ²¹ is preferably 1,4-phenylene or naphthalene-2,6-diyl, and more preferably 1,4-phenylene.

In the above general formula (II), L ²¹ is preferably a single bond, -OCH ₂ -, -CH ₂ O-, -C ₂ H ₄ -, -COO-, -OCO-, -CH=CH-COO-, - CH=CH-OCO-, -COO-CH=CH-, -OCO-CH=CH-, -C ₂ H ₄ -COO-, -C ₂ H ₄ -OCO-, -OCO-C ₂ H ₄ -, -COO-C ₂ H ₄ -, -CH=CH-, -CF ₂ O-, -OCF ₂ - or -C≡C-.

The total content of the polymerizable compounds represented by the general formula (II) is 0.01 to 5% by mass, and the lower limit of the content is preferably 0.02% by mass, preferably 0.03% by mass, preferably 0.04% by mass, preferably 0.05% by mass, preferably 0.06% by mass, preferably 0.07% by mass, preferably 0.08% by mass, preferably 0.09% by mass, preferably 0.1% by mass, preferably 0.15% by mass, preferably 0.2% by mass, preferably 0.25% by mass, preferably 0.3% by mass, preferably 0.35% by mass, preferably 0.4% by mass, Preferably 0.5 mass%, preferably 0.55 mass%, the upper limit of the content is preferably 4.5 mass%, preferably 4 mass%, preferably 3.5 mass%, preferably 3 mass%, preferably 2.5 mass%, preferably 2 mass%, preferably 1.5 mass%, preferably 1 mass %, preferably 0.95 mass %, preferably 0.9 mass %, preferably 0.85 mass %, preferably 0.8 mass %, preferably 0.75 mass %, preferably 0.7 mass %, preferably 0.65 mass %, preferably 0.6 mass %, preferably 0.55 mass %.

The compound represented by the general formula (II) according to the present invention is preferably a polymerizable compound represented by the general formula (IV).

[Chemical 77]

In the above general formula (IV), R ⁷ and R ⁸ each independently represent any one of the above formulae (R-1) to (R-9), and X ¹ to X ⁸ each independently represent a trifluoromethyl group , a fluorine atom, a hydrogen atom or an alkoxy group having 1 to 5 carbon atoms.

In the above general formula (IV), R ⁷ and R ⁸ are each independently preferably methacryloyl or acryloyl.

The compound represented by the aforementioned general formula (IV) is more preferably one or two or more selected from the group consisting of formula (IV-11) to formula (IV-19), and particularly preferably formula (IV-11), formula (IV-11) and formula (IV-19). (IV-16), formula (IV-17).

[Chemical 78]

Specifically, the compound represented by the general formula (II) according to the present invention is preferably, for example, the compound represented by the formula (XX-1) to the general formula (XX-21), more preferably the formula (XX-1) to the formula (XX- 7), formula (XX-14) to formula (XX-29).

[Chemical 79]

[Chemical 80]

[Chemical 81]

In formula (XX-1) to general formula (XX-29), Sp ^xx represents an alkylene group having 1 to 8 carbon atoms or -O-(CH ₂ ) _s -(wherein, s represents an integer of 1 to 7 , the oxygen atom is attached to the ring.).

In formula (XX-1) to general formula (XX-29), the hydrogen atom in 1,4-phenylene may be further replaced by -F, -Cl, -CF ₃ , -CH ₃ or formula (R-1) Substituted with any of formula (R-15).

In addition, as the compound represented by the general formula (II), for example, the polymerizable compounds represented by the formula (M1) to the formula (M18) are preferable.

[Chemical 82]

In addition, polymerizable compounds such as formula (M19) to formula (M34) are also preferred.

[Chemical 83]

[Chemical 84]

The hydrogen atoms in the 1,4-phenylene group and the naphthylene group in the formula (M19) to the formula (M34) may be further substituted with -F, -Cl, -CF ₃ , -CH ₃ .

Moreover, the compound represented by general formula (II) is also preferably a polymerizable compound represented by formula (M35) to formula (M65).

[Chemical 85]

[Chemical 86]

[Chemical 87]

[Chemical 88]

[Chemical 89]

In the polymerizable compound-containing liquid crystal composition according to the present invention, the content of the polymerizable compounds represented by the formulae (M1) to (M65) with respect to the entire liquid crystal composition is 0.01 to 5 mass %, and the lower limit of the content is preferably 0.02 mass %, preferably 0.03 mass %, preferably 0.04 mass %, preferably 0.05 mass %, preferably 0.06 mass %, preferably 0.07 mass %, preferably 0.08 mass %, preferably 0.09 mass %, preferably 0.1 mass %, preferably 0.15 mass %, preferably 0.2 mass %, preferably 0.25 mass %, preferably 0.3 mass %, preferably 0.35 mass %, preferably 0.4 mass %, preferably 0.5 mass %, preferably 0.55 mass %, the upper limit of the content is preferably 4.5 mass %, preferably 4 mass %, preferably 3.5 mass % , preferably 3 mass%, preferably 2.5 mass%, preferably 2 mass%, preferably 1.5 mass%, preferably 1 mass%, preferably 0.95 mass%, preferably 0.9 mass%, preferably 0.85 mass%, preferably 0.8 mass%, preferably 0.75 mass% , preferably 0.7% by mass, preferably 0.65% by mass, preferably 0.6% by mass, preferably 0.55% by mass.

When a monomer is added to the composition of the present invention, the polymerization can proceed even in the absence of a polymerization initiator, but a polymerization initiator may be contained in order to accelerate the polymerization. As a polymerization initiator, benzoin ethers, benzophenones, acetophenones, benzil ketals, acylphosphine oxides, etc. are mentioned.

The composition in the present invention may further contain a compound represented by the general formula (Q).

[Chemical 90]

(in the formula, R ^Q represents a straight-chain or branched alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group may be -O such that the oxygen atoms are not directly adjacent to each other. -, -CH=CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ - substituted, the hydrogen atom in R ^Q can be replaced by 4-hydroxyl- 3,5-di-tert-butylphenyl substituted, M ^Q represents trans-1,4-cyclohexylene, 1,4-phenylene or single bond, 1 in trans-1,4-cyclohexylene 2 or non-contiguous 2 -CH ₂ - may be substituted by -O-.)

R ^Q represents a straight-chain or branched-chain alkyl group having 1 to 22 carbon atoms, and one or more CH ₂ groups in the alkyl group may be separated by -O-, -CH such that oxygen atoms are not directly adjacent to each other. =CH-, -CO-, -OCO-, -COO-, -C≡C-, -CF ₂ O-, -OCF ₂ - substituted, preferably straight-chain alkyl or straight-chain alkane having 1 to 10 carbon atoms Oxygen, straight-chain alkyl substituted with 1 CH ₂ group by -OCO- or -COO-, branched alkyl, branched alkoxy, branched with 1 CH ₂ group substituted by -OCO- or -COO- Alkyl, more preferably a straight-chain alkyl group having 1 to 20 carbon atoms, a straight-chain alkyl group in which one CH ₂ group is substituted by -OCO- or -COO-, a branched-chain alkyl group, a branched alkoxy group, and one CH The ₂ group is a branched chain alkyl group substituted by -OCO- or -COO-. M ^Q represents trans-1,4-cyclohexylene, 1,4-phenylene or a single bond, preferably trans-1,4-cyclohexylene or 1,4-phenylene.

More specifically, the compound represented by the general formula (Q) is preferably a compound represented by the following general formula (Q-a) to general formula (Q-e).

[Chemical 91]

In the formula, R ^Q1 is preferably a straight-chain or branched alkyl group with 1 to 10 carbon atoms, R ^Q2 is preferably a straight-chain or branched alkyl group with 1 to 20 carbon atoms, and R ^Q3 is preferably a straight-chain alkyl group with 1 to 20 carbon atoms A straight-chain alkyl group to 8, a branched-chain alkyl group, a straight-chain alkoxy group or a branched-chain alkoxy group, and L ^Q is preferably a straight-chain alkylene group or a branched-chain alkylene group having 1 to 8 carbon atoms. Among the compounds represented by general formula (Qa) to general formula (Qe), compounds represented by general formula (Qa), general formula (Qc) and general formula (Qe) are more preferable.

As the specific compound represented by the general formula (Q), the formula (Q-11) to the formula (Q-15) are particularly preferable.

[Chemical 92]

In the composition of the present invention, the compound represented by the general formula (Q) preferably contains one or two, more preferably one to five, and the lower limit of the preferred content is 0.0001%, 0.0002%, and 0.0005%. , 0.001%, 0.002%, 0.005%, 0.01%, 0.015%, 0.02%, 0.05%, 0.75%, 0.01%, the upper limit of the preferred content is 1%, 1%, 0.9%, 0.8%, 0.7%, 0.6%, 0.5%, 0.4%, 0.3%, 0.25%, 0.2%, 0.19%, 0.18%, 0.17%, 0.16%, 0.15%.

The liquid crystal composition of the present invention may contain at least one compound represented by the general formula (I-1).

[Chemical 93]

In the general formula (I-1), R ^HS each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and particularly preferably a hydrogen atom. In the case of an alkyl group, the number of carbon atoms is preferably 1 to 8, the number of carbon atoms is preferably 1 to 5, the number of carbon atoms is preferably 1 to 3, and the number of carbon atoms is more preferably 1. When there are multiple R ^HSs , they may be the same or different.

When n ^HS represents 1, M ^HS represents an alkyl group having 1 to 15 carbon atoms, and when n ^HS represents an integer of 2 to 6, M ^HS represents an alkylene group having 1 to 15 carbon atoms, and M ^HS represents an alkylene group having 1 to 15 carbon atoms. One or more -CH ₂ - can be replaced by -O-, -CH=CH-, -C≡C-, -CO-, -OCO-, -COO-, trans-1,4-cyclohexylene, 1, 4-phenylene, naphthalene-2,6-diyl substituted, if considering the viscosity imparted to the liquid crystal composition and its own volatility, M ^HS is preferably an alkyl group or an alkylene group with 2 to 10 carbon atoms, preferably carbon An alkyl group or an alkylene group having 2 to 8 atoms, preferably an alkyl group or an alkylene group having 4 to 8 carbon atoms, preferably an alkyl group or an alkylene group having 6 or 8 carbon atoms. M ^HS can be linear or branched

n ^HS represents an integer of 1 to 6, preferably 2 to 4.

When n ^HS represents 1, the compound represented by general formula (I-1) is preferably a compound represented by general formula (I-11), general formula (I-12) or general formula (I-13).

[Chemical 94]

(In the formula, R ^H11 each independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, and M represents an alkylene group having 1 to 13 carbon atoms.)

[Chemical 95]

(In the formula, R ^H12 and R ¹¹² each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms.)

[Chemical 96]

(In the formula, R ^H13 and R ¹¹³ each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms.)

When n ^HS represents 2, the compound represented by the general formula (I-1) is preferably a compound represented by the general formula (I-2).

[Chemical 97]

(wherein, R ^H1 and R ^H2 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms, M represents an alkylene group having 1 to 15 carbon atoms, and one or more -CH ₂ - Can be -O-, -CH=CH-, -C≡C-, -CO-, -OCO-, -COO-, trans-1,4-cyclohexylene, 1,4-phenylene, naphthalene -2,6-diyl substituted.)

In the general formula (I-2), R ^H1 and R ^H2 are particularly preferably hydrogen atoms. In the case of an alkyl group, the number of carbon atoms is preferably 1 to 8, the number of carbon atoms is preferably 1 to 5, the number of carbon atoms is preferably 1 to 3, and the number of carbon atoms is more preferably 1.

In the general formula (I-2), M represents an alkylene group having 1 to 15 carbon atoms, and M is preferably an alkylene group having 2 to 10 carbon atoms in consideration of the viscosity imparted to the liquid crystal composition and its own volatility. , preferably an alkylene group having 4 to 8 carbon atoms, preferably an alkylene group having 6 or 8 carbon atoms.

Specifically, compounds represented by general formula (I-24), general formula (I-26) and general formula (I-28) can be mentioned. R ^H1 and R ^H2 in these formulae are as previously described.

[Chemical 98]

More specifically, compounds represented by general formula (I-24H), general formula (I-26H) and general formula (I-28H), bis(2,2) represented by general formula (I-28H) can be mentioned. ,6,6,-tetramethyl-4-piperidinyl)sebacate is the most suitable.

[Chemical 99]

In addition, when n ^HS represents an integer of 3 to 6, the compound represented by the general formula (I-1) is preferably a compound represented by the general formula (I-3). Since the compound represented by general formula (I-3) has a high effective amine concentration, it is a compound which acts more effectively. In addition, among the compounds represented by the general formula (I-1), compounds having a small molecular weight are adsorbed on the alignment film in the liquid crystal display element, and display unevenness is often induced, while the compounds represented by the general formula (I-3) Since the compound has a large molecular weight, the induction of display unevenness can be prevented.

[Chemical 100]

(In the formula, R ^H3 , R ^H4 and R ^H5 each independently represent a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. n ^H1 and n ^H2 each independently represent 0 or 1. n ^H3 represents an integer of 1 to 4 When n ^H3 is 2, 3 or 4 and there are more than one R ^H5 , they may be the same or different.)

In the general formula (I-3), R ^H3 , R ^H4 and R ^H5 are particularly preferably hydrogen atoms. In the case of an alkyl group, the number of carbon atoms is preferably 1 to 8, the number of carbon atoms is preferably 1 to 5, the number of carbon atoms is preferably 1 to 3, and the number of carbon atoms is more preferably 1.

Specifically, compounds represented by general formula (I-31), general formula (I-32) and general formula (I-33) are preferred. R ^H3 , R ^H4 and R ^H5 in these formulae are as previously described.

[Chemical 101]

More specifically, compounds represented by formula (I-31H), formula (I-31C), formula (I-32H) and formula (I-33H) are preferred.

[Chemical 102]

The liquid crystal composition contains the compound represented by the general formula (I-1), and the lower limit in the composition is preferably 0.01% or more, preferably 0.02% or more, preferably 0.03% or more, preferably 0.05% or more, It is preferably 0.07% or more, preferably 0.1% or more, preferably 0.15% or more, preferably 0.2% or more, preferably 0.25% or more, preferably 0.3% or more, preferably 0.5% or more, preferably 1% or more. The upper limit is preferably 5% or less, preferably 3% or less, preferably 1% or less, preferably 0.5% or less, preferably 0.45% or less, preferably 0.4% or less, preferably 0.35% or less, preferably 0.3% or less, preferably 0.25% or less, preferably 0.2% or less, preferably 0.15% or less, preferably 0.1% or less, preferably 0.07% or less, preferably 0.05% or less, preferably 0.03% or less.

More specifically, the content is preferably 0.01 to 5% by mass, preferably 0.01 to 0.3% by mass, more preferably 0.02 to 0.3% by mass, and particularly preferably 0.05 to 0.25% by mass. More specifically, when it is important to suppress the precipitation at low temperature, the content thereof is preferably 0.01 to 0.1 mass %.

In addition, the liquid crystal composition of the present invention may further contain an antioxidant and/or a light stabilizer. More specifically, the compounds represented by the following (III-1) to (III-38) are preferable.

[Chemical 103]

[Chemical 104]

[Chemical 105]

[Chemical 106]

[Chemical 107]

[Chemical 108]

[Chemical 109]

[Chemical 110]

(In the formula, n represents an integer of 0 to 20.)

The composition of the present invention may contain the compound represented by the general formula (Q), the compound represented by the general formula (I-1), and the antibacterial compounds represented by the general formulae (III-1) to (III-38) in combination. Selected compounds among oxidizing agents and/or light stabilizers. In the liquid crystal composition, the content of these additives is preferably 0.01% or more, preferably 0.02% or more, preferably 0.03% or more, preferably 0.05% or more, preferably 0.07% or more, as a lower limit value in the composition. , preferably 0.1% or more, preferably 0.15% or more, preferably 0.2% or more, preferably 0.25% or more, preferably 0.3% or more, preferably 0.5% or more, preferably 1% or more. The upper limit is preferably 5% or less, preferably 3% or less, preferably 1% or less, preferably 0.5% or less, preferably 0.45% or less, preferably 0.4% or less, preferably 0.35% or less, and preferably contains 0.3% or less, preferably 0.25% or less, preferably 0.2% or less, preferably 0.15% or less, preferably 0.1% or less, preferably 0.07% or less, preferably 0.05% or less, preferably 0.03% or less.

More specifically, the content is preferably 0.01 to 5% by mass, preferably 0.01 to 0.3% by mass, more preferably 0.02 to 0.3% by mass, and particularly preferably 0.05 to 0.25% by mass. More specifically, when it is important to suppress the precipitation at low temperature, the content thereof is preferably 0.01 to 0.1 mass %.

In general, various parameters calculated from the physical property values of the liquid crystal composition are used as a method of expressing the properties of a liquid crystal display element. Among these, there are γ ₁ /K ₃₃ or γ ₁ /K _ave as a parameter governing the response speed, K ₁₁ /K ₃₃ as a parameter governing the sharpness of the electro-optical effect, and |K ₃₃ as a parameter governing the driving voltage /Δε| or |K _ave /Δε| and _Kave which strongly dominates the contrast ratio, etc. The liquid crystal composition of the present invention combines high-speed response, low driving voltage, good low-temperature storage stability, high transmittance and high contrast. It should be noted that K _ave in this specification is defined as the average value of K ₁₁ and K ₃₃ .

Therefore, γ ₁ /K ₃₃ , which is a parameter governing the response speed of the vertical alignment liquid crystal display element, is preferably 10.0 mPa·s·pN ⁻¹ or less, preferably 9.8 mPa·s·pN ⁻¹ or less, ^and preferably 9.5 mPa·s·pN −1 ¹ or less, preferably 9.2mPa·s·pN ⁻¹ or less, preferably 9.0mPa·s·pN ⁻¹ or less, preferably 8.8mPa·s·pN ⁻¹ or less, preferably 8.6mPa·s·pN ⁻¹ or less, preferably 8.4mPa s·pN ⁻¹ or less, preferably 8.2 mPa·s·pN ⁻¹ or less, preferably 8.0 mPa·s·pN ⁻¹ or less, preferably 7.8 mPa·s·pN ⁻¹ or less, preferably 7.6 mPa·s·pN ⁻¹ or less, preferably 7.4 mPa·s·pN ⁻¹ or less, preferably 7.2 mPa·s·pN ⁻¹ or less, preferably 7.0 mPa·s·pN ⁻¹ or less, preferably 6.8 mPa·s·pN ⁻¹ or less, particularly preferably 6.6 mPa · s · pN ^-1 or less.

γ ₁ /K _ave which is a parameter governing the response speed of the horizontally aligned liquid crystal display element is preferably 10.0 mPa·s·pN ⁻¹ or less, preferably 9.8 mPa·s·pN ⁻¹ or less, preferably 9.5 mPa·s·pN ⁻¹ or less , preferably 9.2mPa·s·pN ^-1 or less, preferably 9.0mPa·s·pN ^-1 or less, preferably 8.8mPa·s·pN- ¹ or less, preferably 8.6mPa·s·pN- ¹ or less, preferably 8.4mPa·s pN ^-1 or less, preferably 8.2 mPa s pN ^-1 or less, preferably 8.0 mPa s pN ^-1 or less, preferably 7.8 mPa s pN ^-1 or less, preferably 7.6 mPa s pN ^-1 or less, Preferably 7.4mPa·s·pN ⁻¹ or less, preferably 7.2mPa·s·pN ⁻¹ or less, preferably 7.0mPa·s·pN ⁻¹ or less, preferably 6.8mPa·s·pN ⁻¹ or less, particularly preferably 6.6mPa·s · pN ^-1 or less.

K ₁₁ /K ₃₃ , which is a parameter governing the sharp change of the electro-optical effect in the vertical alignment liquid crystal display element, is preferably 1.30 or less, preferably 1.25 or less, preferably 1.20 or less, preferably 1.18 or less, preferably 1.15 or less, preferably 1.12 or less, preferably 1.10 or less, It is preferably 1.08 or less, preferably 1.06 or less, preferably 1.04 or less, preferably 1.02 or less, particularly preferably 1.00 or less.

|K ₃₃ /Δε|, which is a parameter governing the driving voltage of the vertical alignment liquid crystal display element, is preferably 6.0 pN or less, preferably 5.9 pN or less, preferably 5.8 pN or less, preferably 5.7 pN or less, preferably 5.6 pN or less, preferably 5.5 pN or less, preferably 5.4pN or less, preferably 5.3pN or less, preferably 5.2pN or less, preferably 5.1pN or less, preferably 5.0pN or less, preferably 4.9pN or less, particularly preferably 4.8pN or less.

|K _ave /Δε|, which is a parameter governing the driving voltage of the horizontally aligned liquid crystal display element, is preferably 6.0 pN or less, preferably 5.9 pN or less, preferably 5.8 pN or less, preferably 5.7 pN or less, preferably 5.6 pN or less, preferably 5.5 pN or less, preferably 5.4pN or less, preferably 5.3pN or less, preferably 5.2pN or less, preferably 5.1pN or less, preferably 5.0pN or less, preferably 4.9pN or less, particularly preferably 4.8pN or less.

_Kave , which is a parameter governing the contrast of the liquid crystal display element, is preferably 10.0 pN or more, preferably 10.5 pN or more, preferably 11.0 pN or more, preferably 11.5 pN or more, preferably 12.0 pN or more, preferably 12.5 pN or more, preferably 13.0 pN or more, preferably 13.0 pN above, preferably 14.0pN or above, preferably 14.2pN or above, preferably 14.4pN or above, preferably 14.6pN or above, preferably 14.8pN or above, preferably 15.0pN or above, preferably 15.2pN or above, preferably 15.4pN or above, preferably 15.6pN or above, preferably 15.8pN above, preferably 16.0pN or above, preferably 16.2pN or above, preferably 16.4pN or above, preferably 16.6pN or above, preferably 16.8pN or above, preferably 17.0pN or above, preferably 17.2pN or above, preferably 17.4pN or above, preferably 17.6pN or above, preferably 17.8pN Above, particularly preferably 18.0 pN or more.

Especially in the case of a horizontal alignment liquid crystal display element with poor contrast, preferably 16.0pN or more, preferably 16.2pN or more, preferably 16.4pN or more, preferably 16.6pN or more, preferably 16.8pN or more, preferably 17.0pN or more, preferably 17.2pN or more , preferably 17.4pN or more, preferably 17.6pN or more, preferably 17.8pN or more, particularly preferably 18.0pN or more.

The composition containing the polymerizable compound of the present invention is used for a liquid crystal display element in which the amount of transmitted light is controlled by the birefringence of the composition, by polymerizing the polymerizable compound contained in the composition by ultraviolet irradiation to impart liquid crystal alignment energy.

The liquid crystal display element using the composition of the present invention is a useful element that combines high-speed response and suppression of display defects, and is particularly useful in an active matrix driving liquid crystal display element, and can be applied to VA mode, PSVA mode, PSA mode, and IPS mode. , FFS mode or ECB mode liquid crystal display element.

In addition, in the production process of a liquid crystal display element by the ODF method, it is necessary to add an optimum liquid crystal injection amount according to the size of the liquid crystal display element, and the liquid crystal composition of the present invention is, for example, for the droplet that occurs when the liquid crystal is dropped. Rapid pressure changes and shocks in the device are less affected, and liquid crystal can be dropped stably for a long period of time, so that the yield of the liquid crystal display element can also be kept high. In particular, small liquid crystal display elements commonly used in smartphones, which are popular recently, are difficult to control the deviation from the optimum value within a certain range because the optimum liquid crystal injection amount is small. However, by using the liquid crystal composition of the present invention, A stable discharge amount of liquid crystal material can be achieved even in a small liquid crystal display element.

Example

The following examples are given to further describe the present invention in detail, but the present invention is not limited to these examples. In addition, "%" in the composition of the following Examples and Comparative Examples means "mass %".

In the examples, the properties measured are as follows.

T _ni : Nematic phase-isotropic liquid phase transition temperature (°C)

Δn: Refractive index anisotropy at 293K

Δε: Dielectric constant anisotropy at 293K

γ ₁ : Rotational viscosity at 293K (mPa·s)

K ₁₁ : splay elastic constant (pN) at 293K

K ₂₂ : Torsional elastic constant at 293K (pN)

K ₃₃ : Bending elastic constant (pN) at 293K

_Kave. : Average elastic constant (pN) at 293K

In addition, in an Example, the following abbreviations were used for description of a compound.

(ring structure)

[Chemical 111]

(side chain structure)

[Table 1]

shorthand chemical structure -n -C_nH_2n+1 n- C_nH_2n+1- -On -OC_nH_2n+1 nO- C_nH_2n+1O- -V -CH=CH₂ V- CH₂=CH- -V1 -CH=CH-CH₃ 1V- CH₃-CH=CH- -2V -CH₂-CH₂-CH=CH₂ V2- CH₂=CH-CH₂-CH₂- -2V1 -CH₂-CH₂-CH=CH-CH₃ 1V2- CH₃-CH=CH-CH₂-CH₂-

(Wherein, n in the table is a natural number.)

(connection structure)

[Table 2]

shorthand chemical structure -n- -C_nH_2n- -nO- -C_nH_2nO- -On- -OC_nH_2n- -COO- -C(=O)-O- -OCO- -O-C(=O)- -V- -CH=CH- -nV- -C_nH_2n-CH=CH- -Vn- -CH=CH-C_nH_2n- -T- -C≡C- -CF 2O- -CF₂-O- -OCF2- -O-CF₂-

(Wherein, n in the table is a natural number.)

(judgment criteria)

When evaluating the characteristics as a horizontally aligned liquid crystal display element, the prepared polyimide alignment film was applied to each cell with a comb-shaped ITO which was rubbed and coated with a polyimide alignment film that induced homogeneous alignment. The liquid crystal composition was obtained to obtain an in-plane switching (IPS) liquid crystal display element. About these obtained IPS liquid crystal display elements, electro-optical characteristics were measured, and evaluation of drive voltage, response speed, transmittance, contrast, etc. was performed. The results were judged in three stages: "○: no problem level", "△: slightly insufficient and unacceptable level", and "x: unacceptable level". When evaluating a liquid crystal composition with Δn of less than 0.105, a cell with a cell gap of 2.8 μm was used, and when evaluating a liquid crystal composition with Δn of 0.105 or more, a cell with a cell gap of 2.6 μm was used.

When evaluating the characteristics as a vertical alignment liquid crystal display element, the prepared liquid crystal composition was injected by a vacuum injection method into a cell with ITO coated with a polyimide alignment film for inducing vertical alignment, and a vertical alignment was obtained. (VA) Liquid crystal display element. About these obtained VA liquid crystal display elements, electro-optical characteristics were measured, and evaluation of drive voltage, response speed, transmittance, contrast, etc. was performed. The results were judged in three stages: "○: no problem level", "△: slightly insufficient and unacceptable level", and "x: unacceptable level". When evaluating a liquid crystal composition with Δn of less than 0.105, a cell with a cell gap of 3.3 μm was used, and when evaluating a liquid crystal composition with Δn of 0.105 or more, a cell with a cell gap of 3.0 μm was used.

In the case of evaluating a liquid crystal display element typified by polymer stabilized vertical alignment (PSVA), in which a polymerizable compound is added to a liquid crystal composition and photopolymerization is performed to constrain the alignment of liquid crystal molecules, the injected liquid crystal display element was evaluated. , in the case of a VA liquid crystal display element, while applying a rectangular wave of 10V and 100Hz to the liquid crystal display element, an exposure of about 10J is performed with a UV lamp with an intensity of about 100mW/cm ^-2 (365nm). Exposure of about 100 J was performed in the state, and a polymer stabilized vertical alignment (PSVA) liquid crystal display element was obtained. In the case of an IPS or FFS liquid crystal display element, exposure of about 100 J is performed without applying a voltage, and a polymer-stabilized horizontal alignment (PS-IPS or PS-FFS) liquid crystal display element is obtained. About the obtained liquid crystal display element, electro-optical characteristics were measured, and evaluation of drive voltage, response speed, transmittance, contrast ratio, etc. was performed. The results were judged in three stages: "○: no problem level", "△: slightly insufficient and unacceptable level", and "x: unacceptable level".

(Comparative Example 1 and Example 1)

The liquid crystal composition of LC-A was prepared as a comparative example, and the liquid crystal composition of LC-1 was prepared as an example, and the physical property values were measured. The constitution of the liquid crystal composition and the results of its physical properties are shown below.

[table 3]

LC-1 (Example 1) and LC-A (Comparative Example 1) were found to be sufficiently small in γ ₁ /K _ave. as a parameter governing the response speed and |K _ave. /Δε| as a parameter governing the driving voltage sufficiently Low liquid crystal composition. On the other hand, it was found that Δn was significantly smaller in LC-A than in LC-1.

Next, as a result of obtaining a horizontally aligned liquid crystal display element and a vertically aligned liquid crystal display element using these liquid crystal compositions, it was confirmed that all of these liquid crystal display elements exhibited a high-speed response and a low driving voltage. However, it was observed that the display element produced using LC-A had a lower transmittance than the liquid crystal display element produced using LC-1, and the contrast was significantly lowered with this.

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition that can satisfy all of high-speed response, low driving voltage, high transmittance, and high contrast.

(Comparative Example 2 and Example 2)

The liquid crystal composition of LC-B was prepared as a comparative example, and the liquid crystal composition of LC-2 was prepared as an example, and the physical property values were measured. The constitution of the liquid crystal composition and the results of its physical properties are shown below.

[Table 4]

It was found that LC-2 (Example 2) and LC-B (Comparative Example 2) were liquid crystal compositions in which |K _ave. /Δε|, which is a parameter governing the driving voltage, was sufficiently low. On the other hand, compared with LC-2, LC-B shows that Kave., which is a parameter governing driving voltage, response speed, and contrast, is smaller, and γ ₁ /K _{ave .} , which is a parameter governing response speed, is larger.

Next, as a result of obtaining a horizontal alignment liquid crystal display element and a vertical alignment liquid crystal display element using these liquid crystal compositions, it was confirmed that all of these liquid crystal display elements showed a low driving voltage. However, it turned out that the liquid crystal display element produced using LC-B has a slower response speed and lower contrast than the liquid crystal display element produced using LC-2.

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition that can satisfy all of high-speed response, low driving voltage, high transmittance, and high contrast.

(Examples 3, 4 and 5)

Liquid crystal compositions of LC-3, LC-4, and LC-5 were prepared as examples, and their physical property values were measured. The constitution of the liquid crystal composition and the results of its physical properties are shown below.

[table 5]

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition that satisfies all of high-speed response, low driving voltage, high transmittance, and high contrast in a liquid crystal display element.

(Examples 6, 7 and 8)

Liquid crystal compositions of LC-6, LC-7, and LC-8 were prepared as examples, and their physical property values were measured. The constitution of the liquid crystal composition and the results of its physical properties are shown below.

[Table 6]

[Table 7]

From the above, it was found that the liquid crystal composition of the present invention is an excellent liquid crystal composition that can satisfy all of high-speed response, low driving voltage, high transmittance, and high contrast in a liquid crystal display element.

(Example 9 to Example 40)

Polymerizable compounds represented by XX-2, XX-5, XX-15 and M65 were added to the prepared liquid crystal compositions LC-1 to LC8 as polymerizable compounds to prepare polymerizable compound-containing liquid crystal compositions MLC-1 to MLC-32 (Examples 9-40).

[Chemical 112]

The structure of the obtained polymerizable compound-containing liquid crystal composition is shown below.

[Table 8]

[Table 9]

[Table 10]

[Table 11]

[Table 12]

[Table 13]

[Table 14]

[Table 15]

After obtaining a horizontal alignment liquid crystal display element and a vertical alignment liquid crystal display element using these polymerizable compound-containing liquid crystal compositions, UV treatment is performed to obtain a polymer-stabilized liquid crystal display element. It was confirmed that all of these polymer-stabilized liquid crystal display elements exhibited characteristics equal to or higher than those of the liquid crystal display elements produced in Examples 1 to 8.

As can be seen from the above, the liquid crystal composition of the present invention is an excellent liquid crystal composition that can satisfy all of high-speed response, low driving voltage, high transmittance, and high contrast even in a polymer liquid crystal display element.

Claims (12)

1. A liquid crystal composition comprising a compound represented by the formula (i) and further comprising 1 or 2 or more compounds selected from the group consisting of compounds represented by the general formula (N-1d) and compounds represented by the general formula (N-1),

[ solution 1]

[ solution 2]

In the formula, R^Nd11And R^Nd12Each independently represents an alkyl group having 1 to 8 carbon atoms, 1 of the alkyl groups being non-adjacent 2 or more-CH₂-each independently may be substituted by-CH ═ CH-, -C ≡ C-, -O-, -CO-, -COO-or-OCO-,

n^Nd11represents a group of 1,2 or 3,

[ solution 3]

In the formula, R^N11And R^N12Each independently represents an alkyl group having 1 to 8 carbon atoms, 1 of the alkyl groups being non-adjacent 2 or more-CH₂-each independently may be substituted by-CH ═ CH-, -C ≡ C-, -O-, -CO-, -COO-or-OCO-,

n^N11and n^N12Each independently represents 0, 1,2 or 3, n^N11+n^N12Represents a group of 1,2 or 3,

A^N11and A^N12Each independently represents a group selected from the group consisting of,

(a)1, 4-cyclohexylene radical, 1-CH present in this radical₂-or 2 or more-CH not adjacent₂-may be substituted by-O-;

(b)1, 4-phenylene, 1-CH ═ or nonadjacent 2 or more-CH ═ present in the group can be substituted by-N ═ or; and

(c) 1-CH or not adjacent 2 or more-CH present in naphthalene-2, 6-diyl, 1,2,3, 4-tetrahydronaphthalene-2, 6-diyl or decahydronaphthalene-2, 6-diyl, naphthalene-2, 6-diyl or 1,2,3, 4-tetrahydronaphthalene-2, 6-diyl may be substituted by-N ═ in the molecule,

the above-mentioned group (a), group (b) and group (c) may be each independently substituted with an alkyl group, an alkenyl group, a cyano group, a fluorine atom or a chlorine atom, and 1-CH present in the alkyl group₂-or 2 or more-CH not adjacent₂-1-CH which may be substituted by-O-and is present in the alkenyl radical₂-or 2 or more-CH not adjacent₂-may be substituted by-O-,

Z^N11and Z^N12Each independently represents a single bond, -CH₂CH₂-、-(CH₂)₄-、-OCH₂-、-CH₂O-、-COO-、-OCO-、-OCF₂-、-CF₂O-, -CH-N-CH-, -CH-, -CF-or-C ≡ C-,

A^N11and/or A^N12When plural, they may be the same or different, Z^N11And/or Z^N12When plural are present, they may beThe same or different, but the compound represented by the general formula (N-1) does not include the compound represented by the general formula (N-1 d).

2. The liquid crystal composition according to claim 1, wherein the compound represented by the general formula (N-1) comprises a compound represented by the general formula (N-1c),

[ solution 4]

In the formula, R^N11And R^N12R in the general formula (N-1)^N11And R^N12Same meaning, n^Nc11Represents 0 or 1.

3. The liquid crystal composition according to claim 1 or 2, comprising a compound represented by the general formula (N-1e) as the compound represented by the general formula (N-1),

[ solution 5]

In the formula, R^N11And R^N12R in the general formula (N-1)^N11And R^N12Same meaning, n^Ne11Represents 1 or 2, A^Ne11Represents trans-1, 4-cyclohexylene or 1, 4-phenylene, Z^Ne11Represents a single bond or an ethylene group and at least 1 represents an ethylene group.

4. The liquid crystal composition according to claim 1,2 or 3, which comprises a compound represented by the general formula (N-1b) as the compound represented by the general formula (N-1),

[ solution 6]

In the formula, R^N11And R^N12R in the general formula (N-1)^N11And R^N12Same meaning, n^Nb11Represents 1 or 2.

5. The liquid crystal composition according to claim 1,2,3 or 4, which comprises a compound represented by the general formula (N-1 d).

6. The liquid crystal composition according to claim 1,2,3,4 or 5, which comprises a compound represented by the general formula (N-1g) as the compound represented by the general formula (N-1),

[ solution 7]

In the formula, R^N11And R^N12R in the general formula (N-1)^N11And R^N12Same meaning, n^Ng11Represents 1 or 2, A^Ng11Represents trans-1, 4-cyclohexylene, 1, 4-cyclohexenylene or 1, 4-phenylene and at least 1 represents 1, 4-cyclohexenylene.

7. The liquid crystal composition according to claim 1,2,3,4, 5 or 6, which further comprises 1 or 2 or more compounds represented by the general formula (L),

[ solution 8]

In the formula, R^L1And R^L2Each independently represents an alkyl group having 1 to 8 carbon atoms, 1 of the alkyl groups being non-adjacent 2 or more-CH₂-each independently may be substituted by-CH ═ CH-, -C ≡ C-, -O-, -CO-, -COO-or-OCO-,

A^L1、A^L2and A^L3Each independently represents a group selected from the group consisting of,

(a)1, 4-cyclohexylene radical, 1-CH present in this radical₂-or 2 or more-CH not adjacent₂-may be substituted by-O-;

(b)1, 4-phenylene, 1-CH ═ or nonadjacent 2 or more-CH ═ present in the group can be substituted by-N ═ or; and

(c) 1-CH or not adjacent 2 or more-CH present in naphthalene-2, 6-diyl, 1,2,3, 4-tetrahydronaphthalene-2, 6-diyl or decahydronaphthalene-2, 6-diyl, naphthalene-2, 6-diyl or 1,2,3, 4-tetrahydronaphthalene-2, 6-diyl may be substituted by-N ═ in the molecule,

the above-mentioned group (a), group (b) and group (c) may be each independently substituted with an alkyl group, an alkenyl group, a cyano group, a fluorine atom or a chlorine atom, and 1-CH present in the alkyl group₂-or 2 or more-CH not adjacent₂-1-CH which may be substituted by-O-and is present in the alkenyl radical₂-or 2 or more-CH not adjacent₂-may be substituted by-O-,

Z^L1and Z^L2Each independently represents a single bond, -CH₂CH₂-、-(CH₂)₄-、-OCH₂-、-CH₂O-、-COO-、-OCO-、-OCF₂-、-CF₂O-, -CH-N-CH-, -CH-, -CF-or-C ≡ C-,

n^L1represents 0, 1,2 or 3,

A^L2when plural, they may be the same or different, Z^L2When a plurality of them exist, they may be the same or different.

8. The liquid crystal composition according to claim 1,2,3,4, 5, 6 or 7, which further contains a polymerizable compound.

9. The liquid crystal composition according to claim 8, wherein the polymerizable compound is represented by the general formula (II),

[ solution 9]

In the formula, R²⁰¹、R²⁰²、R²⁰³、R²⁰⁴、R²⁰⁵、R²⁰⁶、R²⁰⁷、R²⁰⁸、R²⁰⁹And R²¹⁰Each independently represents P²¹-S²¹Any one of an alkyl group having 1 to 18 carbon atoms which may be substituted with a fluorine atom, an alkoxy group having 1 to 18 carbon atoms which may be substituted with a fluorine atom, a fluorine atom or a hydrogen atom,

P²¹each independently represents a polymerizable group selected from the group consisting of the formulae (R-1) to (R-9),

[ solution 10]

In the formula, R¹¹、R¹²、R¹³、R¹⁴And R¹⁵Each independently represents an alkyl group having 1 to 5 carbon atoms, a fluorine atom or a hydrogen atom, and m^r5、m^r7、n^r5And n^r7Each independently represents 0, 1 or 2,

S²¹represents a single bond or an alkylene group having 1 to 15 carbon atoms, wherein 1 or 2 or more-CH in the alkylene group₂May be substituted by-O-, -OCO-or-COO-in such a way that the oxygen atoms are not directly adjacent,

n²¹represents a number of 0, 1 or 2,

A²¹represents a group selected from the group consisting of,

(a)1, 4-cyclohexylene radical, 1-CH present in this radical₂-or 2 or more-CH not adjacent₂-may be substituted by-O-;

(b)1, 4-phenylene, 1-CH ═ or nonadjacent 2 or more-CH ═ present in the group can be substituted by-N ═ or; and

(c) 1-CH or not adjacent 2 or more-CH present in naphthalene-2, 6-diyl, 1,2,3, 4-tetrahydronaphthalene-2, 6-diyl or decahydronaphthalene-2, 6-diyl, naphthalene-2, 6-diyl or 1,2,3, 4-tetrahydronaphthalene-2, 6-diyl may be substituted by-N ═ in the molecule,

the group (a), the group (b) and the group (c) may be independently substituted with an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a halogen, a cyano group, a nitro group or P²¹-S²¹-a substitution of a group of formula (I),

the above general formula (II) having at least 1 or more P in 1 molecule²¹-S²¹-，

L²¹Is a single bond, -OCH₂-、-CH₂O-、-C₂H₄-、-OC₂H₄O-、-COO-、-OCO-、-CH＝CR^a-COO-、-CH＝CR^a-OCO-、-COO-CR^a＝CH-、-OCO-CR^a＝CH-、-(CH₂)_z-COO-、-(CH₂)_z-OCO-、-OCO-(CH₂)_z-、-COO-(CH₂)_z-、-CH＝CH-、-CF₂O-、-OCF₂-or-C ≡ C-, wherein R is^aEach independently represents a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and in the formula, z independently represents an integer of 1 to 4.

10. A liquid crystal display element using the liquid crystal composition according to claim 1,2,3,4, 5, 6, 7, 8 or 9.

11. A vertical alignment type liquid crystal display element using the liquid crystal composition according to claim 1,2,3,4, 5, 6, 7, 8 or 9.

12. A horizontally aligned liquid crystal display element comprising the liquid crystal composition according to claim 1,2,3,4, 5, 6, 7, 8 or 9.