JP4872758B2 - Polymerizable liquid crystal composition - Google Patents

Description

  The present invention relates to a polymerized liquid crystal composition useful as a component of an optical anisotropic body used for optical compensation of a liquid crystal display or the like, and an optical anisotropic body composed of a polymer of the composition.

  The polymerizable liquid crystal composition is useful as a constituent member of an optical anisotropic body, and the optical anisotropic body is applied to various liquid crystal displays as a retardation film, for example. The retardation film is obtained by applying a polymerizable liquid crystal composition to a substrate and curing the polymerizable liquid crystal composition by irradiating active energy rays in a state where the polymerizable liquid crystal composition is aligned by an alignment film or the like. It is done. Usually, an alignment layer is provided between the substrate and the polymerizable liquid crystal composition, but since an adhesive or the like is not used, the adhesion with the substrate is not satisfactory. In addition, for the purpose of reducing the thickness and weight and reducing the cost, a method of incorporating a retardation film in a liquid crystal cell of a liquid crystal display is attracting attention. There is a step of forming a transparent electrode. Accordingly, not only the adhesion to the substrate but also the adhesion to the ITO transparent electrode is required.

  In order to improve the adhesion to the substrate, a configuration is disclosed in which a phosphorus compound having one polymerizable functional group in the skeleton is added to the polymerizable liquid crystal composition (see Patent Document 1). However, the polymerizable phosphorus compound used in the polymerizable liquid crystal composition described in the cited document is not sufficiently compatible with a nonpolar solvent or a polymerizable liquid crystal.

  From the above, it is possible to produce optical anisotropic bodies excellent in adhesion to various substrates and particularly ITO transparent electrodes, and contains polymerizable phosphorus compounds having compatibility with nonpolar solvents and polymerizable liquid crystals It has been desired to develop a polymerizable composition.

JP 2001-279245 A (Claim 4)

  An object of the present invention is to provide a polymerized liquid crystal composition that is useful as a constituent member of an optically anisotropic body excellent in adhesion to various substrates and particularly an ITO transparent electrode, and excellent in compatibility.

  As a result of diligent studies to solve the above-mentioned problems, a compound that can be added to the polymerizable liquid crystal composition to improve the adhesion to the substrate without impairing the compatibility was successfully clarified. The present invention has been completed. The present invention relates to the general formula (I)

(In the formula, k represents 1 to 12, m represents 0 to 10, R ^a represents ^a hydrogen atom or a methyl group, and R ^b and R ^c each independently represents a hydrogen atom, a halogen atom, or a carbon atom number. 1 to 6 alkyl groups, wherein a hydrogen atom in the alkyl group may be substituted by one or more halogen atoms.), M is 2 to 10 Or at least one of R ^b and R ^c is a halogen atom or an alkyl group having 1 to 6 carbon atoms (the hydrogen atom in the alkyl group may be substituted by one or more halogen atoms) A polymerizable liquid crystal composition characterized by containing a polymerizable phosphorus-based compound substituted by (1) is provided, and an optical anisotropic body which is a cured product of the polymerizable liquid crystal composition is also provided.

  The polymerizable liquid crystal composition of the present invention is excellent in compatibility with various solvents, and the optical anisotropic body comprising the polymerizable composition as a constituent member is excellent in adhesion to various substrates and particularly ITO transparent electrodes. Therefore, the polymerizable liquid crystal composition of the present invention is useful as an optical anisotropic material, and can be suitably used particularly as an optical anisotropic body incorporated into a liquid crystal cell.

The best mode of the polymerizable liquid crystal composition according to the present invention will be described below. The polymerizable liquid crystal composition of the present invention contains a polymerizable phosphorus compound represented by the general formula (I).
In general formula (I), m is preferably 1 to 8, and more preferably 1 to 6.
k is preferably 2 to 10, more preferably 2 to 8, and particularly preferably 2 to 5.
R ^b and R ^c each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms (the hydrogen atom in the alkyl group may be substituted with one or more halogen atoms). It is more preferable that at least one represents an alkyl group having 1 to 6 carbon atoms (a hydrogen atom in the alkyl group may be substituted with one or more halogen atoms), and has 1 carbon atom. It is preferable to represent a 1-3 alkyl group or a C1-C3 alkyl group substituted with a halogen atom (a halogen atom represents a fluorine atom or a chlorine atom).

  Specific examples of suitable polymerizable phosphorus compounds include compounds represented by the following formulas (I-1) to (I-3).

  These polymerizable phosphorus compounds are preferably contained in the polymerizable liquid crystal composition in an amount of 0.001 to 5% by mass, more preferably 0.005 to 3% by mass, and 0.01 to 2% by mass. Is particularly preferred.

  The polymerizable liquid crystal compound contained in the polymerizable liquid crystal composition described above can be used without any particular limitation, and the polymerizable liquid crystal composition can be used in a solution in an organic solvent. Also good. Suitable organic solvents include, for example, alkyl-substituted benzenes such as toluene, xylene and cumene, propylene glycol monomethyl ether acetate, butyl acetate and cyclohexanone. Further, dimethylformamide, γ-butyrolactone, N-methylpyrrolidinone, methyl ethyl ketone, ethyl acetate and the like may be added to these solvents. As the polymerizable liquid crystal compound, a rod-like polymerizable liquid crystal compound or a disk-like polymerizable liquid crystal compound is preferably used, and a rod-like polymerizable liquid crystal compound is particularly preferred.

  The rod-like polymerizable liquid crystal compound has the general formula (II)

(Wherein P represents a reactive functional group, Sp represents a spacer group having 1 to 20 carbon atoms, m represents 0 or 1, MG represents a mesogenic group or a mesogenic support group, and R ¹ represents Represents a halogen atom, a cyano group or an alkyl group having 1 to 25 carbon atoms, and the alkyl group may be substituted by one or more halogen atoms or CN, and one CH ₂ present in the group. Group or two or more non-adjacent CH ₂ groups are each independently of each other such that —O—, —S—, —NH—, —N (CH ₃ ) -, -CO-, -COO-, -OCO-, -OCOO-, -SCO-, -COS- or -C≡C- may be substituted, or R ¹ may have the general formula (II-a)

(Wherein P represents a reactive functional group, Sp represents a spacer group having 1 to 20 carbon atoms, and m represents 0 or 1). In the general formula (II), Sp represents an alkylene group, and the alkylene group may be substituted with one or more halogen atoms or CN. One CH ₂ group or two or more non-adjacent CH ₂ groups present in each other independently of each other in a form in which oxygen atoms are not directly bonded to each other, —O—, —S—, —NH— , —N (CH ₃ ) —, —CO—, —COO—, —OCO—, —OCOO—, —SCO—, —COS— or —C≡C— may be substituted. ), Where MG is the general formula (II-b)

(In the formula, A1, A2 and A3 are each independently 1,4-phenylene group, 1,4-cyclohexylene group, 1,4-cyclohexenyl group, tetrahydropyran-2,5-diyl group, 1, 3-dioxane-2,5-diyl group, tetrahydrothiopyran-2,5-diyl group, 1,4-bicyclo (2,2,2) octylene group, decahydronaphthalene-2,6-diyl group, pyridine- 2,5-diyl group, pyrimidine-2,5-diyl group, pyrazine-2,5-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, 2,6-naphthylene group, Phenanthrene-2,7-diyl group, 9,10-dihydrophenanthrene-2,7-diyl group, 1,2,3,4,4a, 9,10a-octahydrophenanthrene 2,7-diyl group, fluorene 2, Represents a 7-diyl group, the 1,4-phenylene group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, 2,6-naphthylene group, phenanthrene-2,7-diyl group, 9 , 10-dihydrophenanthrene-2,7-diyl group, 1, 2,3,4,4a, 9,10a-octahydrophenanthrene 2,7-diyl group and fluorene 2,7-diyl group are substituted with one or more F, Cl, CF ₃ , OCF ₃ , cyano group, It may have an alkyl group having 1 to 8 carbon atoms, an alkoxy group, an alkanoyl group, an alkanoyloxy group, an alkenyl group having 2 to 8 carbon atoms, an alkenyloxy group, an alkenoyl group or an alkenoyloxy group. , - - independently, -COO, the Z1, Z2 and _{Z3 OCO -, - CH 2 CH} 2 -, - OCH 2 -, - CH 2 O -, - CH = CH -, - C≡C-, -CH = CHCOO -, - OCOCH = CH -, - CH 2 CH 2 COO -, - CH 2 CH 2 OCO -, - COO CH 2 CH 2 -, - OCOCH 2 CH 2 -, - CONH -, - NHCO- Or a single bond, n represents 0, 1 or 2), and P represents a general formula (II-c), general formula (II-d) or general formula (II-e)

(In the formula, R ²¹ , R ²² , R ²³ , R ³¹ , R ³² , R ³³ , R ⁴¹ , R ⁴² and R ⁴³ are each independently a hydrogen atom, a halogen atom or an alkyl group having 1 to 5 carbon atoms. And n represents 0 or 1. It is more preferable to contain a compound represented by a substituent selected from the group consisting of substituents represented by:
Here, the compound contained in the polymerizable liquid crystal composition is more specifically represented by the general formula (III)

Wherein m represents 0 or 1, W ¹ and W ² each independently represent a single bond, —O—, —COO— or —OCO—, and Y ¹ and Y ² each independently represent — COO- or -OCO- is represented, and r and s each independently represent an integer of 2 to 18, the 1,4-phenylene group present in the formula is an alkyl group or alkoxy group having 1 to 7 carbon atoms , An alkanoyl group, a cyano group, or a halogen atom may be substituted, which is preferable because an optically anisotropic body excellent in mechanical strength and heat resistance can be obtained.
In addition, general formula (IV)

(In the formula, Z ¹ represents a hydrogen atom, a halogen atom, a cyano group or a hydrocarbon group having 1 to 20 carbon atoms, Z ² represents a hydrogen atom or a methyl group, t represents 0 or 1, A, B and C are each independently a 1,4-phenylene group, a 1,4-phenylene group in which a non-adjacent CH group is substituted with nitrogen, a 1,4-cyclohexylene group, one or two non-adjacent CH ₂ Represents a 1,4-cyclohexylene group or 1,4-cyclohexenylene group in which the group is substituted with an oxygen or sulfur atom, and the 1,4-phenylene group present in the formula is an alkyl having 1 to 7 carbon atoms Group, an alkoxy group, an alkanoyl group, a cyano group or a halogen atom, and Y ³ and Y ⁴ are each independently a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, _{-OCH 2 -, - COO -,} - OCO -, - C≡C -, - CH = CH -, - CF = CF -, - (CH 2) 4 -, - CH 2 CH 2 CH 2 O -, - OCH ₂ CH ₂ CH _2- , -CH = CHCH ₂ CH _2- , -CH _{2 CH 2 CH = CH -, -} CH = CHCOO -, - OCOCH = CH -, - CH 2 CH 2 COO -, - CH 2 CH 2 OCO -, - COO CH 2 CH 2 - or -OCOCH ₂ CH ₂ - and Y ⁵ represents a single bond, —O—, —COO—, —OCO—, or —CH═CHCOO—)), the viscosity of the polymerizable liquid crystal composition can be reduced and the liquid crystal temperature range can be reduced. Is preferable because it can be reduced to room temperature or near room temperature.
General formula (V)

(In the formula, Z ³ represents a hydrogen atom, a halogen atom, a cyano group, a hydrocarbon group having 1 to 20 carbon atoms, Z ⁴ represents a hydrogen atom or a methyl group, and W ³ each independently represents a single bond,- O—, —COO—, —OCO—, v represents an integer of 2 to 18, u represents an integer of 0 or 1, and D, E, and F are each independently a 1,4-phenylene group. 1,4-phenylene group in which non-adjacent CH groups are substituted with nitrogen, 1,4-cyclohexylene group, 1,4-cyclohexene group in which one or two non-adjacent CH ₂ groups are substituted with oxygen or sulfur atoms Represents a silene group or a 1,4-cyclohexenylene group, and these D, E, and F are one or more alkyl groups, alkoxy groups, alkanoyl groups, cyano groups, or halogen atoms having 1 to 7 carbon atoms. Y ⁶ and Y ⁷ may each independently be a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, —OCO—, —C≡C -, -CH = C H -, - CF = CF - , - (CH 2) 4 -, - CH 2 CH 2 CH 2 O -, - OCH 2 CH 2 CH 2 -, - CH = CHCH 2 CH 2 -, - CH 2 CH 2 CH = CH -, - CH = CHCOO -, - OCOCH = CH -, - CH 2 CH 2 COO -, - CH 2 CH 2 OCO -, - COOCH 2 CH 2 - or -OCOCH ₂ CH ₂ -, Y represents ⁸ represents a single bond, —O—, —COO—, —OCO—, or —CH═CHCOO—.) When a compound represented by the formula (1) is used, liquid crystal can be produced without greatly increasing the viscosity of the polymerizable liquid crystal composition. It is preferable because the physical properties can be adjusted.
Specific examples of the compound represented by the general formula (II) can be given below.

(Wherein j and k each independently represents an integer of 2 to 18)
Specific examples of the compound represented by the general formula (III) can be given below.

又、一般式（IV）で表される化合物の具体的な例として、化合物の構造と相転移温度を以下に挙げることができる。

Specific examples of the compound represented by the general formula (IV) include the structure of the compound and the phase transition temperature.

(In the formula, a cyclohexane ring represents a transcyclohexane ring, a number represents a phase transition temperature, C represents a crystalline phase, N represents a nematic phase, S represents a smectic phase, and I represents an isotropic liquid phase.)
Specific examples of the compound represented by the general formula (V) can be given below.

(In the formula, X ¹ represents a hydrogen atom or a methyl group, and R represents an alkyl group having 1 to 20 carbon atoms.)
The discotic liquid crystal compound has a benzene derivative, a triphenylene derivative, a truxene derivative, a phthalocyanine derivative or a cyclohexane derivative as a mother nucleus at the center of the molecule, and a linear alkyl group, a linear alkoxy group, or a substituted benzoyloxy group on its side. It preferably has a structure that is radially substituted as a chain, and has the general formula (VI)

（式中、R⁵はそれぞれ独立して一般式（VI-a）で表される置換基を表す。）

(In the formula, each R ⁵ independently represents a substituent represented by the general formula (VI-a).)

(In the formula, R ⁶ and R ⁷ each independently represent a hydrogen atom, a halogen atom or a methyl group, and R ⁸ represents an alkoxy group having 1 to 20 carbon atoms, and the hydrogen atom in the alkoxy group represents a general formula. (It may be substituted with a substituent represented by (VI-b), general formula (VI-c) or general formula (VI-d))

Wherein R ⁸¹ , R ⁸² , R ⁸³ , R ⁸⁴ , R ⁸⁵ , R ⁸⁶ , R ⁸⁷ , R ⁸⁸ and R ⁸⁹ are each independently a hydrogen atom, a halogen atom or an alkyl group having 1 to 5 carbon atoms. And n represents 0 or 1). In general formula (VI), at least one of R ⁸ is represented by general formula (VI-b) or general formula (VI -c) or an alkoxy group substituted by a substituent represented by the general formula (VI-d), preferably all of R ⁸ are represented by the general formula (VI-b), the general formula (VI-c) or It is particularly preferable to represent an alkoxy group substituted by a substituent represented by the general formula (VI-d).
Furthermore, the general formula (VI-a) specifically represents the general formula (VI-e)

It is particularly preferable to have a structure represented by the formula (wherein n represents an integer of 2 to 9).
In addition to the polymerizable phosphorus compound, the above polymerizable liquid crystal composition may contain an additive such as a polymerization inhibitor, a polymerization initiator, a surfactant, an antioxidant, or an ultraviolet absorber.

EXAMPLES Hereinafter, although an Example is given and this invention is further explained in full detail, this invention is not limited to these Examples.
Example 1
50% by mass of the compound of the formula (a)

式(b)の化合物50質量%

50% by mass of the compound of the formula (b)

A polymerizable liquid crystal composition (A) comprising: The present invention in which a polymerizable liquid crystal composition (A) 97.9% by mass is added with 2.0% by mass of a photopolymerization initiator Irgacure-651 (manufactured by Ciba Specialty Chemicals) and 0.1% by mass of a polymerizable phosphorus compound of formula (I-1) A polymerizable liquid crystal composition (A1) was prepared. Next, a xylene solution containing 20% by mass of the polymerizable liquid crystal composition (A1) was prepared. This xylene solution was spin-coated on a glass substrate with an ITO solid electrode (1200 rotations / minute, 15 seconds). The polymerizable liquid crystal composition (A1) was cured by irradiating the spin-coated substrate with 30 mW / cm ² of ultraviolet light in a nitrogen atmosphere for 50 seconds. The adhesion test of the optically anisotropic body thus obtained to the ITO transparent electrode was evaluated by a cross-cut method (JIS K5600-5-6). Further, the compatibility of the polymerizable liquid crystal composition (A1) was evaluated. When it was transparent by visual observation, it was marked as “◯”, and when it was cloudy, it was marked as “X”. The evaluation results are shown in Table 1.

(Examples 2-3)
The polymerizable liquid crystal composition (A2) is used in the same manner as in Example 1 except that the formula (I-1) is used instead of the formula (I-1) as the polymerizable phosphorus compound, and the formula (I-3) is used. (A3) was produced, and an optically anisotropic body was produced in the same manner. The adhesion test to the ITO transparent electrode of the obtained optical anisotropic body was evaluated by a cross-cut method (JIS K5600-5-6). Further, the compatibility of the polymerizable liquid crystal compositions (A2) to (A3) was evaluated. When it was transparent by visual observation, it was marked as “◯”, and when it was cloudy, it was marked as “X”. The evaluation results are shown in Table 1 together with Example 1.

表１より重合性リン系化合物を0.1質量%添加した重合性液晶組成物（A1）〜（A3）では何れも相溶性が良く、又、密着性試験結果の分類は１であり、密着性に優れていることがわかる。

As shown in Table 1, all of the polymerizable liquid crystal compositions (A1) to (A3) to which 0.1% by mass of a polymerizable phosphorus compound is added have good compatibility, and the classification of the adhesion test results is 1. It turns out that it is excellent.

(Comparative Example 1)
A polymerizable liquid crystal composition (B1) was prepared by adding 2.0% by mass of a photopolymerization initiator Irgacure-651 (manufactured by Ciba Specialty Chemicals) to 98% by mass of the polymerizable liquid crystal composition (A). Next, a xylene solution containing 20% by mass of the polymerizable liquid crystal composition (B1) was prepared. This xylene solution was spin-coated on a glass substrate with an ITO solid electrode (1200 rotations / minute, 15 seconds). The polymerizable liquid crystal composition (B1) was cured by irradiating the spin-coated substrate with 30 mW / cm ² of ultraviolet light in a nitrogen atmosphere for 50 seconds. The adhesion test of the optically anisotropic body thus obtained to the ITO transparent electrode was evaluated by a cross-cut method (JIS K5600-5-6). Further, the compatibility of the polymerizable liquid crystal composition (B1) was evaluated. When it was transparent by visual observation, it was marked as “◯”, and when it was cloudy, it was marked as “X”. The evaluation results are shown in Table 2. From Table 2, when the polymerizable phosphorus compound is not added, the adhesiveness is inferior compared with the case where 0.1% by mass of the formula (I-1) to the formula (I-3) is added as the polymerizable phosphorus compound. I understand.

(Comparative Example 2)
A polymerizable liquid crystal composition (B2) was prepared in the same manner as in Example 1 except that the formula (c) was used instead of the formula (I-1) as the polymerizable phosphorus compound, and the optically anisotropic substance was similarly produced. Was made.

The adhesion test to the ITO transparent electrode of the obtained optical anisotropic body was evaluated by a cross-cut method (JIS K5600-5-6). Further, the compatibility of the polymerizable liquid crystal composition (B2) was evaluated. When it was transparent by visual observation, it was marked as “◯”, and when it was cloudy, it was marked as “X”. The evaluation results are shown in Table 2 together with Comparative Example 1. From Table 2, when 0.1% by mass of the polymerizable phosphorus compound of formula (c) is added, it is compared with 0.1% by mass of the polymerizable phosphorus compound of formula (I-1) to formula (I-3). It can be seen that the compatibility is poor.

Claims (11)

Formula (I)

(In the formula, k represents 1 to 12, m represents 0 to 10, R ^a represents ^a hydrogen atom or a methyl group, and R ^b and R ^c each independently represents a hydrogen atom, a halogen atom, or a carbon atom number. 1 to 6 alkyl groups, wherein a hydrogen atom in the alkyl group may be substituted by one or more halogen atoms.), M is 2 to 10 Or at least one of R ^b and R ^c is a halogen atom or an alkyl group having 1 to 6 carbon atoms (the hydrogen atom in the alkyl group may be substituted by one or more halogen atoms) A polymerizable liquid crystal composition comprising a polymerizable phosphorus compound substituted by the above formula (1). The polymerizable liquid crystal composition according to claim 1, comprising 0.001 to 5% by mass of a polymerizable phosphorus compound. A polymerizable composition comprising the polymerizable liquid crystal composition according to claim 1 and an organic solvent. Formula (II)

(In the formula, P represents a reactive functional group, Sp represents a spacer group having 1 to 20 carbon atoms, m represents 0 or 1, MG represents a mesogenic group or a mesogenic support group, and R1 represents Represents a halogen atom, a cyano group or an alkyl group having 1 to 25 carbon atoms, the alkyl group may be substituted by one or more halogen atoms or CN, and one CH2 group present in the group or Two or more non-adjacent CH ₂ groups are each independently independent of each other in a form in which oxygen atoms are not directly bonded to each other, —O—, —S—, —NH—, —N (CH ₃ ) —, -CO-, -COO-, -OCO-, -OCOO-, -SCO-, -COS- or -C≡C- may be substituted, or R ¹ may have the general formula (II-a)

(Wherein P represents a reactive functional group, Sp represents a spacer group having 1 to 20 carbon atoms, and m represents 0 or 1). The polymerizable liquid crystal composition according to claim 1, comprising a compound represented by: In the general formula (II), Sp represents an alkylene group, and the alkylene group may be substituted by one or more halogen atoms or CN, and is not adjacent to one CH ₂ group present in the group. Two or more CH ₂ groups are independently of each other, in a form in which oxygen atoms are not directly bonded to each other, —O—, —S—, —NH—, —N (CH ₃ ) —, —CO—, It may be substituted by -COO-, -OCO-, -OCOO-, -SCO-, -COS- or -C≡C-. ), Where MG is the general formula (II-b)

(In the formula, A1, A2 and A3 are each independently 1,4-phenylene group, 1,4-cyclohexylene group, 1,4-cyclohexenyl group, tetrahydropyran-2,5-diyl group, 1, 3-dioxane-2,5-diyl group, tetrahydrothiopyran-2,5-diyl group, 1,4-bicyclo (2,2,2) octylene group, decahydronaphthalene-2,6-diyl group, pyridine- 2,5-diyl group, pyrimidine-2,5-diyl group, pyrazine-2,5-diyl group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, 2,6-naphthylene group, Phenanthrene-2,7-diyl group, 9,10-dihydrophenanthrene-2,7-diyl group, 1,2,3,4,4a, 9,10a-octahydrophenanthrene 2,7-diyl group, fluorene 2, Represents a 7-diyl group, the 1,4-phenylene group, 1,2,3,4-tetrahydronaphthalene-2,6-diyl group, 2,6-naphthylene group, phenanthrene-2,7-diyl group, 9 , 10-dihydrophenanthrene-2,7-diyl group, 1, 2,3,4,4a, 9,10a-octahydrophenanthrene 2,7-diyl group and fluorene 2,7-diyl group are substituted with one or more F, Cl, CF ₃ , OCF ₃ , cyano group, It may have an alkyl group having 1 to 8 carbon atoms, an alkoxy group, an alkanoyl group, an alkanoyloxy group, an alkenyl group having 2 to 8 carbon atoms, an alkenyloxy group, an alkenoyl group or an alkenoyloxy group. , - - independently, -COO, the Z1, Z2 and _{Z3 OCO -, - CH 2 CH} 2 -, - OCH 2 -, - CH 2 O -, - CH = CH -, - C≡C-, -CH = CHCOO -, - OCOCH = CH -, - CH 2 CH 2 COO -, - CH 2 CH 2 OCO -, - COO CH 2 CH 2 -, - OCOCH 2 CH 2 -, - CONH -, - NHCO- Or a single bond, n represents 0, 1 or 2), and P represents a general formula (II-c), general formula (II-d) or general formula (II-e)

(In the formula, R ²¹ , R ²² , R ²³ , R ³¹ , R ³² , R ³³ , R ⁴¹ , R ⁴² and R ⁴³ are each independently a hydrogen atom, a halogen atom or an alkyl group having 1 to 5 carbon atoms. And n represents 0 or 1. The polymerizable liquid crystal composition according to claim 4, which represents a substituent selected from the group consisting of substituents represented by: General formula (III)

Wherein m represents 0 or 1, W ¹ and W ² each independently represent a single bond, —O—, —COO— or —OCO—, and Y ¹ and Y ² each independently represent — COO- or -OCO- is represented, and r and s each independently represent an integer of 2 to 18, the 1,4-phenylene group present in the formula is an alkyl group or alkoxy group having 1 to 7 carbon atoms , An alkanoyl group, a cyano group, or a halogen atom, which may be substituted one or more.) The polymerizable liquid crystal composition according to claim 5. Formula (IV)

(In the formula, Z ¹ represents a hydrogen atom, a halogen atom, a cyano group or a hydrocarbon group having 1 to 20 carbon atoms, Z ² represents a hydrogen atom or a methyl group, t represents 0 or 1, A, B and C are each independently a 1,4-phenylene group, a 1,4-phenylene group in which a non-adjacent CH group is substituted with nitrogen, a 1,4-cyclohexylene group, one or two non-adjacent CH ₂ Represents a 1,4-cyclohexylene group or 1,4-cyclohexenylene group in which the group is substituted with an oxygen or sulfur atom, and the 1,4-phenylene group present in the formula is an alkyl having 1 to 7 carbon atoms Group, an alkoxy group, an alkanoyl group, a cyano group or a halogen atom, and Y ³ and Y ⁴ are each independently a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, _{-OCH 2 -, - COO -,} - OCO -, - C≡C -, - CH = CH -, - CF = CF -, - (CH 2) 4 -, - CH 2 CH 2 CH 2 O -, - OCH ₂ CH ₂ CH _2- , -CH = CHCH ₂ CH _2- , -CH _{2 CH 2 CH = CH -, -} CH = CHCOO -, - OCOCH = CH -, - CH 2 CH 2 COO -, - CH 2 CH 2 OCO -, - COO CH 2 CH 2 - or -OCOCH ₂ CH ₂ - and The polymerizable liquid crystal composition according to claim 5, comprising a compound represented by the formula: Y ⁵ represents a single bond, —O—, —COO—, —OCO—, or —CH═CHCOO—. General formula (V)

(Wherein Z ³ represents a hydrogen atom, a halogen atom, a cyano group or a hydrocarbon group having 1 to 20 carbon atoms, Z ⁴ represents a hydrogen atom or a methyl group, W ³ represents a single bond, —O—, -COO- or -OCO-, v represents an integer of 2 to 18, u represents 0 or 1, D, E and F are each independently a 1,4-phenylene group or a non-adjacent CH group. 1,4-phenylene group substituted with nitrogen, 1,4-cyclohexylene group, 1,4-cyclohexylene group in which one or two non-adjacent CH ₂ groups are substituted with oxygen or sulfur atoms, 1, Represents a 4-cyclohexenylene group, but the 1,4-phenylene group present in the formula is substituted by one or more alkyl groups, alkoxy groups, alkanoyl groups, cyano groups or halogen atoms having 1 to 7 carbon atoms. Y ⁶ and Y ⁷ are each independently a single bond, —CH ₂ CH ₂ —, —CH ₂ O—, —OCH ₂ —, —COO—, —OCO—, —C≡C—, — CH = CH-, -CF = CF _{-, - (CH 2) 4} -, - CH 2 CH 2 CH 2 O -, - OCH 2 CH 2 CH 2 -, - CH = CHCH 2 CH 2 -, - CH 2 CH 2 CH = CH -, - CH = CHCOO -, - OCOCH = CH -, - CH 2 CH 2 COO -, - CH 2 CH 2 OCO -, - COO CH 2 CH 2 - or -OCOCH ₂ CH ₂ - represents, Y ⁸ represents a single bond, - The polymerizable liquid crystal composition according to claim 5, comprising a compound represented by the formula: O—, —COO—, —OCO— or —CH═CHCOO—. A structure in which a benzene derivative, triphenylene derivative, truxene derivative, phthalocyanine derivative or cyclohexane derivative is used as the mother nucleus of the molecule, and a linear alkyl group, linear alkoxy group, or substituted benzoyloxy group is radially substituted as its side chain. The polymerizable liquid crystal composition according to claim 1, comprising a discotic liquid crystal compound. The polymerizable liquid crystal composition according to claim 9, wherein the discotic liquid crystal compound is represented by the general formula (VI).

(In the formula, each R ⁵ independently represents a substituent represented by the general formula (VI-a).

(In the formula, R ⁶ and R ⁷ each independently represent a hydrogen atom, a halogen atom or a methyl group, and R ⁸ represents an alkoxy group having 1 to 20 carbon atoms, and the hydrogen atom in the alkoxy group represents a general formula. (It may be substituted with a substituent represented by (VI-b), general formula (VI-c) or general formula (VI-d))

Wherein R ⁸¹ , R ⁸² , R ⁸³ , R ⁸⁴ , R ⁸⁵ , R ⁸⁶ , R ⁸⁷ , R ⁸⁸ and R ⁸⁹ are each independently a hydrogen atom, a halogen atom or an alkyl group having 1 to 5 carbon atoms. And n represents 0 or 1.) An optical anisotropic body containing the polymer of the polymerizable liquid crystal composition according to claim 1.