CN115960613A - Dielectric positive liquid crystal composition and application thereof - Google Patents
Dielectric positive liquid crystal composition and application thereof Download PDFInfo
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- CN115960613A CN115960613A CN202211348987.7A CN202211348987A CN115960613A CN 115960613 A CN115960613 A CN 115960613A CN 202211348987 A CN202211348987 A CN 202211348987A CN 115960613 A CN115960613 A CN 115960613A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 88
- 239000000203 mixture Substances 0.000 title claims abstract description 86
- 150000001875 compounds Chemical class 0.000 claims abstract description 87
- LMBFAGIMSUYTBN-MPZNNTNKSA-N teixobactin Chemical compound C([C@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H](CCC(N)=O)C(=O)N[C@H]([C@@H](C)CC)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CO)C(=O)N[C@H]1C(N[C@@H](C)C(=O)N[C@@H](C[C@@H]2NC(=N)NC2)C(=O)N[C@H](C(=O)O[C@H]1C)[C@@H](C)CC)=O)NC)C1=CC=CC=C1 LMBFAGIMSUYTBN-MPZNNTNKSA-N 0.000 claims abstract description 6
- 125000004432 carbon atom Chemical group C* 0.000 claims description 40
- 125000000217 alkyl group Chemical group 0.000 claims description 14
- 125000003342 alkenyl group Chemical group 0.000 claims description 12
- 125000003545 alkoxy group Chemical group 0.000 claims description 12
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 2
- 239000002019 doping agent Substances 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 7
- 238000012360 testing method Methods 0.000 description 25
- 239000000758 substrate Substances 0.000 description 12
- 238000002834 transmittance Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 101100208473 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) lcm-2 gene Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004305 biphenyl Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
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- Liquid Crystal Substances (AREA)
Abstract
The invention provides a dielectric positive liquid crystal composition and application thereof. The dielectric positive liquid crystal composition comprises the following components: at least one compound of formula I; at least one compound of formula II; at least one compound of formula N; at least one compound of formula D; the general formula I is specifically:
the general formula II is specifically:
the general formula N is specifically:
the general formula D is specifically:
Description
Technical Field
The invention belongs to the technical field of liquid crystal materials, and particularly relates to a dielectric positive liquid crystal composition and application thereof.
Background
Since the discovery, liquid crystal molecules have been widely used in various display modes due to their unique optical and electrical properties. By applying different voltages, the rotation angle of the liquid crystal molecules can be controlled, and different transmittances can be obtained. A liquid crystal composition having a negative dielectric Δ ∈ is used for a vertical alignment display, and a liquid crystal composition having a positive dielectric constant is used for a horizontal alignment display such as a TN type, an STN type, or an IPS type. In addition, a driving method in which a liquid crystal composition having positive Δ ∈ is vertically aligned when no voltage is applied and display is performed by applying a lateral electric field has been reported, and the necessity of a liquid crystal composition having positive Δ ∈ is further increased. On the other hand, in all driving methods, low-voltage driving, high-speed response, and a wide operating temperature range are required. That is, Δ ∈ is positive and has a large absolute value, a small viscosity γ 1, and a high nematic isotropic liquid phase transition temperature (Cp). In addition, it is necessary to design appropriate Δ n and cell thickness (cell gap) d so that the liquid crystal display device has an appropriate retardation amount (Δ n.d), and a liquid crystal composition having a small γ 1 is required in the case of using the liquid crystal display device for a television or the like because high-speed response is important.
Disclosure of Invention
In order to solve the technical problems, the invention provides a dielectric positive liquid crystal composition and application thereof. The invention provides a liquid crystal composition which has a liquid crystal phase with a wide temperature range, small viscosity, good solubility at low temperature, high specific resistance and voltage holding ratio and positive Delta epsilon stable to heat and light, and provides IPS and TN type display components with excellent display quality and difficult residue through using the liquid crystal composition. The liquid crystal composition has positive dielectric property, low rotational viscosity, good low-temperature mutual compatibility and good light and heat stability, and is used for liquid crystal display elements and has the phenomena of high response speed, low image viscosity, poor display and the like.
The first object of the present invention is to provide a dielectrically positive liquid crystal composition comprising the following components:
(1) At least one compound of formula I;
(2) At least one compound of formula II;
(3) At least one compound of formula N;
(4) At least one compound of formula D;
wherein, the general formula I is specifically:
R A1 represents an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms or an alkenyl group of 2 to 12 carbon atoms;
L 1 represents an alkyl group of 1 to 5 carbon atoms;
Z A1 represents a C-C single bond, -CH 2 CH 2 -、-CH＝CH-、-CF 2 O-、-OCF 2 -、-CH 2 O-、-OCH 2 -、
-CO-O-、-C 2 F 4 -, or-CF = CF-;
m represents 0 or 1;
the general formula II is specifically:
wherein R is C1 Represents 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;
e represents 0 or 1;
the general formula N is specifically:
R C1 、R C2 each independently of the other represents an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms, or an alkenyl group of 2 to 12 carbon atoms;
c. d represents independently of one another 0,1,2;
Z C1 、Z C2 independently of one another, represents a C-C single bond, -CH 2 CH 2 -、-CF 2 O-、-OCF 2 -、-CH 2 O-、-OCH 2 -、-CO-O-、-C 2 F 4 -, or-CF = CF-;
the general formula D is specifically:
wherein R is D1 、R D2 Independently of one another, an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms or an alkenyl group having 2 to 12 carbon atoms.
In one embodiment of the invention, the compound of formula I is 0.001-1% by weight of the liquid crystal composition; the compound shown in the general formula II accounts for 1-40% of the liquid crystal composition; the compound shown in the general formula N is 1-50% of the liquid crystal composition, and the compound shown in the general formula D is 1-60% of the liquid crystal composition.
In one embodiment of the invention, the compound represented by the general formula I is one or more of the following compounds:
further, the compound shown in the general formula I is one or more of the following compounds:
the content of the compound of formula I in the liquid crystal composition is 0.001 to 1% by mass, for example, 0.002%, 0.004%, 0.005%, 0.007%, 0.009%, 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%, 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, or 0.9% relative to the total weight of the liquid crystal composition, and the specific values between the above values are not exhaustive, and for the sake of brevity, and the invention does not include the specific values included in the range, preferably 0.001 to 0.5%, and more preferably 0.001 to 0.2%.
In one embodiment of the present invention, the compound represented by the general formula II is one or more of the following compounds:
further, the compound shown in the general formula II is one or more of the following compounds:
the lower limit of the weight percentage of the compound of formula II with respect to the total weight of the liquid crystal composition of the present invention is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 20%, 22%, 24%, or 26%; the upper limit of the weight percentage of the compound of formula II with respect to the total weight of the liquid crystal composition of the present invention is 50%, 48%, 45%, 40%, 38%, 35%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12% or 10%.
In one embodiment of the present invention, the compound represented by the general formula N is one or more of the following compounds:
further, the compound shown in the general formula N is one or more of the following compounds:
the lower limit of the weight percentage of the compound represented by the general formula N is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 20%, 22%, 24%, or 26% relative to the total weight of the liquid crystal composition of the present invention; the upper limit of the weight percentage of the compound represented by the general formula N is 60%, 58%, 56%, 54%, 52%, 50%, 48%, 45%, 40%, 38%, 35%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12%, or 10% with respect to the total weight of the liquid crystal composition of the present invention.
In one embodiment of the present invention, the compound represented by the general formula D is one or more of the following compounds:
the lower limit of the weight percentage of the compound of formula D relative to the total weight of the liquid crystal composition of the present invention is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 16%, 20%, 22%, 24%, or 26%; the upper limit of the weight percentage of the compound of formula D with respect to the total weight of the liquid crystal composition of the present invention is 60%, 58%, 56%, 54%, 52%, 50%, 48%, 45%, 40%, 38%, 35%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12%, or 10%.
In one embodiment of the present invention, the liquid crystal composition further comprises one or more compounds represented by formula III, specifically formula III
Wherein,
represents ^ independently of one another>
One or more of H on (a) may be substituted by F;
R B1 、R B2 independently of one another, an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms or an alkenyl group of 2 to 12 carbon atoms;
L B1 、L B2 independently of one another, F, cl, CH 3 Or CF 3 ；
d represents 0 or 1.
In one embodiment of the present invention, the compound represented by the general formula III is one or more of the following compounds:
wherein R is B1 Represents an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms, or an alkenyl group of 2 to 12 carbon atoms; r B2 Represents an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms, or an alkenyl group of 2 to 12 carbon atoms, F, cl, CH 3 、OCF 3 Or CF 3 。
In one embodiment of the present invention, the compound represented by the formula III is 1 to 40% by mass of the liquid crystal composition.
Further, the lower limit of the weight percentage of the compound of formula III is 1%, 1.5%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 12%, 14%, 15%, 18%, 20%, or 25% relative to the total weight of the liquid crystal composition of the present invention; the upper limit of the weight percentage of the compound of formula III with respect to the total weight of the liquid crystal composition of the present invention is 40%, 38%, 36%, 34%, 32%, 30%, 28%, 26%, 24%, 20%, 18%, 16%, 15%, 14%, 12% or 10%.
In one embodiment of the present invention, the liquid crystal composition further comprises an additive which is a pleochroic dye and/or a chiral dopant; the additive content is 0-15wt%.
In one embodiment of the invention, the additive comprises 0-5% by weight of the total liquid crystal composition; more preferably, the additive is 0-1% of the total weight of the liquid crystal composition.
In one embodiment of the invention, the additive is selected from one or more of the following compounds:
The second purpose of the invention is to provide the application of the dielectric positive liquid crystal composition in preparing a liquid crystal display device. Application to IPS and FFS mode liquid crystal display device
In one embodiment of the present invention, the liquid crystal display device includes TN, ECB, IPS, and FFS mode liquid crystal display devices.
Compared with the prior art, the technical scheme of the invention has the following advantages:
compared with the prior art, the liquid crystal composition provided by the invention has better low-temperature storage phase change point and higher photo-thermal stability under the condition of maintaining proper optical anisotropy, proper clearing point and proper dielectric anisotropy, so that a liquid crystal display device containing the liquid crystal composition has a wider use temperature range, a higher response speed, a better transmittance, lower image residue and poor quality under the condition of maintaining proper threshold voltage, and has higher application value in TN mode, IPS mode and FFS mode liquid crystal displays.
Detailed Description
The present invention is further described below with reference to specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
Table 1 radical structure code of liquid crystal compounds
The following compounds are exemplified:
as shown by the code of Table 1, 5CPUF,5 n-pentyl group, C cyclohexyl group, P1, 4-diphenyl group, and U3, 5-difluoro-1, 4-diphenyl group
And the following steps:
represented by the code of Table 1 as 3PGUQUF, wherein Q represents-CF 2 O-；
The abbreviated codes of the test items in the following examples are as follows:
cp (. Degree. C.): clearing point (nematic-isotropic phase transition temperature);
Δ n: refractive index anisotropy (589nm, 25 ℃);
Δ ε: dielectric anisotropy (1KHz, 25 ℃);
t (ms): response time (25 ± 0.5 ℃); filling liquid crystal between two glass substrates, and testing with LCT-5016
t＝t on +t off ：t on Represents the time required for the relative transmittance to change from 10% to 90%, t off Represents the time required for the relative transmittance to change from 90% to 10%;
γ 1 : represents the rotational viscosity [ mPas ] measured at 25 DEG C]Measured in a magnetic field by the spin method;
wherein Δ ε = ε || -ε ⊥ Wherein, epsilon || Is a dielectric constant parallel to the molecular axis,. Epsilon ⊥ For the dielectric constant perpendicular to the molecular axis, test conditions: 25 ℃ and 1KHz.
LTS: and (3) low-temperature storage stability, wherein the liquid crystal mixture is stored in a glass bottle and stored under a low-temperature condition.
K11: a splay elastic constant;
k33: a bending elastic constant.
VHR is voltage holding ratio, the liquid crystal is filled between two glass substrates, and the higher the voltage holding ratio is measured by TOYO LCM-2, which shows that the less movable ions in the liquid crystal display component are, the better the stability of the liquid crystal display component is.
Comparative example 1
A mixture D1 was prepared with the compounds and weight percentages listed in Table 2, and filled between two substrates of a liquid crystal display for performance testing, and the composition and test data of the mixture D1 are shown in Table 2 below.
TABLE 2
| Components | Percentage of | Performance of | Parameter(s) |
| 2CPP2 | 6 | Cp | 74.5 |
| VCPP1 | 8 | Δn | 0.112 |
| 3CCV1 | 14 | ε∥ | 10.4 |
| 3CCV | 38 | ε⊥ | 3.9 |
| 3CPUF | 6 | Δε | 6.5 |
| 3PGUQUF | 6 | ||
| 4PGUQUF | 6 | γ1 | 49 |
| 5PGUQUF | 5 | LTS | Uncrystallized at-25 ℃ for 10 days |
| 1PP2V | 6 | K11 | 12.3 |
| 1PP2V1 | 3 | K33 | 15.4 |
| 3PUQUF | 4 | ||
| In total | 100 |
Example 1:
compound I-1 was added to D1 in an amount of 0.001% by mass based on the total mass of the mixture to obtain mixture M1.
Comparative example 2
The compounds and weight percentages listed in table 3 were used to prepare mixture D2, which was filled between two substrates of the lcd for performance testing, and the composition and test data of mixture D2 are shown in table 3 below.
TABLE 3
Example 2
To the mixture D2 was added compound I-2 in an amount of 0.005% by mass based on the total mass of the mixture to obtain a mixture M8.
Example 3
A mixture M3 was prepared according to the compounds and weight percentages listed in table 4, and filled between two substrates of the lcd for performance testing, and the composition and test data of the mixture M3 are shown in table 4 below.
TABLE 4
Compound I-1 was added to M3 in an amount of 1% of the total mixture.
Example 4
Compound M4 was prepared according to the compounds and weight percentages listed in table 5, and filled between two substrates of the lcd for performance testing, and the composition and test data of compound M4 are shown in table 5 below.
TABLE 5
| Components | Percentage of | Performance of | Parameter(s) |
| 3CCV | 31 | Cp | 78.2 |
| 3CCV1 | 12 | Δn | 0.100 |
| 3CPP1 | 3 | ε∥ | 6.3 |
| 3PPP1 | 6 | ε⊥ | 2.9 |
| 1PP2V1 | 10 | Δε | 3.4 |
| VCCP1 | 18 | ||
| V2CCP1 | 5 | γ1 | 58 |
| 3CCP2 | 5 | LTS | Uncrystallized at-20 ℃ for 10 days |
| 3CPUQUF | 4 | K11 | 13.2 |
| 2CPUQUF | 6 | K33 | 15.7 |
| Total of | 100 |
The amount of compound I-2 added to M4 was 0.1% by mass of the total mixture.
Example 5
Compound M5 was prepared according to the compounds and weight percentages listed in table 6, and filled between two substrates of the lcd for performance testing, and the composition and test data of compound M5 are shown in table 6 below.
TABLE 6
The amount of compound I-6 added to M5 was 0.04% by mass of the total mixture.
Example 6
Compound M6 was prepared according to the compounds and weight percentages listed in table 7, and filled between two substrates of a liquid crystal display for performance testing, and the composition and test data of compound M6 are shown in table 7 below.
TABLE 7
| Components | Percentage of | Performance of | Parameter(s) |
| 4CC3 | 4 | Cp | 75.5 |
| 3CPP1 | 10 | Δn | 0.112 |
| 3CCV1 | 14 | ε∥ | 11.9 |
| 3CCV | 38 | ε⊥ | 5.4 |
| 3CCPUF | 6 | Δε | 6.5 |
| 3CPUQUF | 6 | ||
| 4DPUQUF | 6 | γ1 | 52 |
| 5PGUQUF | 5 | LTS | Uncrystallized at-25 ℃ for 10 days |
| VCCP1 | 6 | K11 | 14.5 |
| V2CCP1 | 2 | K33 | 16.5 |
| 3PUQUF | 3 | ||
| Total of | 100 |
The amount of compound I-7 added to M6 was 0.05% by mass of the total mixture.
Example 7
Compound M7 was prepared according to the compounds and weight percentages listed in table 8, and filled between two substrates of a liquid crystal display for performance testing, and the composition and test data of compound M7 are shown in table 8 below.
TABLE 8
| Components | Percentage of | Performance of | Parameter(s) |
| 3CCV | 31 | Cp | 76.8 |
| 3CCV1 | 12 | Δn | 0.099 |
| 4CPP3 | 1 | ε∥ | 8.4 |
| 5CPP2 | 6 | ε⊥ | 3.7 |
| 1PP2V1 | 12 | Δε | 4.7 |
| VCCP1 | 16 | ||
| 4PGUQUF | 5 | γ1 | 57 |
| 3PGUQUF | 5 | LTS | Uncrystallized at-25 ℃ for 10 days |
| 3CPUQUF | 4 | K11 | 13.1 |
| 2CPUQUF | 6 | K33 | 15.2 |
| Total of | 100 |
The amount of compound I-10 added to M7 was 0.03% by mass of the total mixture.
Comparative example 3
Compound D3 was prepared according to the compounds and weight percentages listed in table 9, and filled between two substrates of the lcd for performance testing, and the composition and test data of compound D3 are shown in table 9 below.
TABLE 9
Example 8:
compound I-1 was added to D3 in an amount of 0.04% by mass based on the total mass of the mixture to obtain a mixture M8.
Example 9
Compound M9 was prepared according to the compounds and weight percentages listed in table 10, and filled between two substrates of a liquid crystal display for performance testing, and the composition and test data of compound M9 are shown in table 10 below.
TABLE 10
| Components | Percentage of | Performance of | Parameter(s) |
| 3CCV | 21 | Cp | 99 |
| 3CCV1 | 5 | Δn | 0.11 |
| 3CPO2 | 2 | ε∥ | 13.9 |
| 2CCUF | 8 | ε⊥ | 3.5 |
| VCCP1 | 14 | Δε | 10.4 |
| 3PUQUF | 9.5 | ||
| 2CPUQUF | 10 | γ1 | 66 |
| 5CCUF | 7 | LTS | Uncrystallized at-25 ℃ for 10 days |
| 3CPUQUF | 9.5 | K11 | 17.5 |
| 3CCPUF | 5 | K33 | 13.2 |
| 3PGUQUF | 2.5 | ||
| 5PGUQUF | 6.5 | ||
| Total of | 100 |
The amount of compound I-2 added to M9 was 0.03% by mass of the total mixture.
Example 10
Compound M10 was prepared according to the compounds and weight percentages listed in table 11, and filled between two substrates of a liquid crystal display for performance testing, and the composition and test data of compound M10 are shown in table 11 below.
TABLE 11
| Components | Percentage of | Performance of | Parameter(s) |
| 3CCV | 38 | Cp | 92 |
| 3CCV1 | 11 | Δn | 0.109 |
| VCCP1 | 10 | ε∥ | 7.3 |
| V2CCP1 | 8 | ε⊥ | 2.7 |
| 3CPP2 | 8 | Δε | 4.6 |
| 5PP1 | 1 | ||
| 2PGP3 | 4 | γ1 | 45 |
| 3PGUQUF | 5 | LTS | Uncrystallized at-25 ℃ for 10 days |
| 4PGUQUF | 5 | K11 | 16.2 |
| 5PGUQUF | 3 | K33 | 19.2 |
| 3PPGGF | 2 | ||
| 3DGUQUF | 5 | ||
| Total of | 100 |
The amount of compound I-6 added to M10 was 0.05% by mass of the total mixture.
Test example
UV light of 5mw/cm is used for a liquid crystal component prepared from the liquid crystal composition 2 Irradiating for 2000s, then continuing to bake at 60 ℃ for 300 hours, and respectively testing the voltage retention ratio:
TABLE 12
By applying the comparative example and the embodiment, the liquid crystal composition of the invention has a larger elastic constant and a better low-temperature storage phase change point under the condition of maintaining proper optical anisotropy, a proper clearing point and proper dielectric anisotropy, so that a liquid crystal display device comprising the liquid crystal composition has a wider use temperature range, a faster response speed and a better transmittance under the condition of maintaining proper threshold voltage, and meanwhile, the prepared liquid crystal display component shows good stability after being irradiated by ultraviolet light and heated for a long time. The liquid crystal display has higher application value in TN mode, IPS mode and FFS mode liquid crystal displays.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. A dielectrically positive liquid crystal composition comprising the following components:
(1) At least one compound represented by the general formula I;
(2) At least one compound of formula II;
(3) At least one compound represented by the general formula N;
(4) At least one compound of formula D;
wherein, the general formula I is specifically as follows:
R A1 represents an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms or an alkenyl group of 2 to 12 carbon atoms;
L 1 represents an alkyl group of 1 to 5 carbon atoms;
Z A1 represents a C-C single bond, -CH 2 CH 2 -、-CH＝CH-、-CF 2 O-、-OCF 2 -、-CH 2 O-、-OCH 2 -、-CO-O-、-C 2 F 4 -, or-CF = CF-;
m represents 0 or 1;
the general formula II is specifically:
wherein R is C1 Represents 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;
e represents 0 or 1;
the general formula N is specifically:
R C1 、R C2 each independently of the other represents an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms, or an alkenyl group of 2 to 12 carbon atoms;
c. d represents independently of one another 0,1,2;
Z C1 、Z C2 each independently represents a C-C single bond, -CH 2 CH 2 -、-CF 2 O-、-OCF 2 -、-CH 2 O-、-OCH 2 -、-CO-O-、-C 2 F 4 -, or-CF = CF-;
the general formula D is specifically as follows:
wherein R is D1 、R D2 Independently of one another, an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms or an alkenyl group of 2 to 12 carbon atoms.
2. The dielectrically positive liquid crystal composition according to claim 1, wherein the compound of formula I is 0.001 to 1% by mass of the liquid crystal composition; the compound shown in the general formula II accounts for 1-40% of the liquid crystal composition; the compound shown in the general formula N is 1-50% of the liquid crystal composition, and the compound shown in the general formula D is 1-60% of the liquid crystal composition.
3. The dielectrically positive liquid crystal composition according to claim 1, wherein the compound of formula I is one or more of the following compounds:
4. the dielectrically positive liquid crystal composition according to claim 1, wherein the compound of formula II is one or more of the following compounds:
5. the dielectrically positive liquid crystal composition according to claim 1, wherein the compound of formula N is one or more of the following compounds:
6. the dielectrically positive liquid crystal composition according to claim 1, further comprising one or more compounds of formula III, in particular of formula III
Wherein,
represents ^ independently of one another>
One or more of H in (A) may be substituted by F
R B1 、R B2 Each independently of the other represents an alkyl group of 1 to 12 carbon atoms, an alkoxy group of 1 to 12 carbon atoms or an alkenyl group of 2 to 12 carbon atoms;
L B1 、L B2 independently of one another, F, cl, CH 3 Or CF 3 ；
d represents 0 or 1.
7. The dielectrically positive liquid crystal composition according to claim 6, wherein the compound of formula III is 1 to 40% by mass of the liquid crystal composition.
8. The dielectrically positive liquid crystal composition according to any one of claims 1 to 7, further comprising an additive which is a pleochroic dye and/or a chiral dopant; the additive content is 0-15wt%.
9. Use of the dielectrically positive liquid crystal composition according to any one of claims 1 to 8 for the preparation of a liquid crystal display device.
10. Use according to claim 9, wherein the liquid crystal display device comprises TN, ECB, IPS and FFS mode liquid crystal display devices.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104114674A (en) * | 2013-04-05 | 2014-10-22 | Dic株式会社 | Method for producing composition |
| CN104345488A (en) * | 2013-08-02 | 2015-02-11 | 江苏和成显示科技股份有限公司 | Liquid crystal display device |
| CN108659856A (en) * | 2017-03-30 | 2018-10-16 | 江苏和成显示科技有限公司 | Liquid-crystal composition with positive dielectric anisotropy and its display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104114674A (en) * | 2013-04-05 | 2014-10-22 | Dic株式会社 | Method for producing composition |
| CN104345488A (en) * | 2013-08-02 | 2015-02-11 | 江苏和成显示科技股份有限公司 | Liquid crystal display device |
| CN108659856A (en) * | 2017-03-30 | 2018-10-16 | 江苏和成显示科技有限公司 | Liquid-crystal composition with positive dielectric anisotropy and its display device |
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