WO2020022429A1

WO2020022429A1 - Liquid crystal composition, optically anisotropic film, optical film, polarizing plate and image display device

Info

Publication number: WO2020022429A1
Application number: PCT/JP2019/029210
Authority: WO
Inventors: 森嶌　慎一
Original assignee: 富士フイルム株式会社
Priority date: 2018-07-25
Filing date: 2019-07-25
Publication date: 2020-01-30
Also published as: JP6970828B2; JPWO2020022429A1

Abstract

The present invention addresses the problem of providing: a liquid crystal composition used to form an optically anisotropic film having excellent wet heat durability; an optically anisotropic film; an optical film; a polarizing plate; and an image display device. This liquid crystal composition contains: a liquid crystal compound having reverse wavelength dispersion properties; and a compound represented by formula (I), which has normal wavelength dispersion properties. Formula (I): R¹-C(=O)-Cy¹-Cy²-C(=O)-R² In formula (I), Cy¹ and Cy² each denote an optionally substituted 1,4-cyclohexylene group, and R¹ and R² each independently denote a hydrogen atom or a substituent group.

Description

Liquid crystal composition, optically anisotropic film, optical film, polarizing plate and image display device

<< The present invention relates to a liquid crystal composition, an optically anisotropic film, an optical film, a polarizing plate, and an image display device.

The liquid crystal compound exhibiting reverse wavelength dispersion has features such as being able to convert the light beam wavelength accurately over a wide wavelength range, and being able to make the retardation film thinner because of having a high refractive index. Therefore, it is being actively researched.
Further, as a liquid crystal compound exhibiting reverse wavelength dispersion, a T-type molecular design guideline is generally adopted, and the wavelength of the long axis of the molecule is shortened, and the wavelength of the short axis located at the center of the molecule is lengthened. Is required.
From the viewpoint of increasing the wavelength of the short axis located at the center of the molecule, the short-axis skeleton (hereinafter, also referred to as an “inverse wavelength dispersion expression part”) has hydrophilic nitrogen, oxygen, and sulfur atoms. Is known (for example, see Patent Documents 1 to 3).

JP 2010-031223 A International Publication No. WO 2014/010325 Japanese Patent Application Laid-Open No. 2016-081035

SUMMARY OF THE INVENTION The present inventors have studied an optically anisotropic film produced using a composition containing a liquid crystal compound having reverse wavelength dispersion described in Patent Documents 1 to 3, when exposed to high temperature and high humidity. Examination of the wet heat durability problem that the birefringence index changes revealed that there was room for improvement.

Therefore, an object of the present invention is to provide a liquid crystal composition, an optically anisotropic film, an optical film, a polarizing plate, and an image display device used for forming an optically anisotropic film having excellent wet heat durability.

The present inventors have conducted intensive studies to achieve the above object, and as a result, together with a liquid crystal compound exhibiting reverse wavelength dispersion, a liquid crystal composition having a compound having a forward wavelength dispersion and a compound having a predetermined structure. The inventors have found that the use of such an optically anisotropic film results in improved wet heat durability, and completed the present invention.
That is, it has been found that the above-described object can be achieved by the following configuration.

[1] A liquid crystal composition containing a liquid crystal compound having reverse wavelength dispersion and a compound having forward wavelength dispersion and represented by the following formula (I).
[2] The liquid crystal composition according to [1], wherein the liquid crystal compound is a compound represented by the following formula (II).
[3] The compound according to [1] or [2], wherein the compound represented by the formula (I) described later is a compound represented by any of the formulas (I-1) to (I-3) described later. Liquid crystal composition.

[4] An optically anisotropic film obtained by polymerizing the liquid crystal composition according to any one of [1] to [3].
[5] The optically anisotropic film according to [4], which satisfies the following formula (III).
0.50 <Re (450) / Re (550) <1.00 (III)
Here, in the formula (III), Re (450) represents in-plane retardation of the optically anisotropic film at a wavelength of 450 nm, and Re (550) represents in-plane retardation of the optically anisotropic film at a wavelength of 550 nm. Represents
[6] An optical film having the optically anisotropic film according to [4] or [5].
[7] A polarizing plate comprising the optical film according to [6] and a polarizer.
[8] An image display device comprising the optical film according to [6] or the polarizing plate according to [7].

According to the present invention, it is possible to provide a liquid crystal composition, an optically anisotropic film, an optical film, a polarizing plate, and an image display device used for forming an optically anisotropic film having excellent wet heat durability.

FIG. 1A is a schematic sectional view showing an example of the optical film of the present invention. FIG. 1B is a schematic sectional view showing an example of the optical film of the present invention. FIG. 1C is a schematic sectional view showing an example of the optical film of the present invention.

Hereinafter, the present invention will be described in detail.
The description of the components described below may be made based on typical embodiments of the present invention, but the present invention is not limited to such embodiments.
In addition, in this specification, a numerical range represented by using “to” means a range including numerical values described before and after “to” as a lower limit and an upper limit.
Further, in the present specification, each component may use a substance corresponding to each component alone or in combination of two or more. Here, when two or more substances are used in combination for each component, the content of that component refers to the total content of the substances used in combination unless otherwise specified.
Further, in the present specification, the bonding direction of the divalent group (for example, —O—CO—) is not particularly limited except for the case where the bonding position is specified, and for example, the following formula ( In the case where D ^{1 in} II) is —CO—O—, when the position bonding to the Ar side is * 1 and the position bonding to the G ¹ side is * 2, D ¹ is * 1- It may be CO-O- * 2 or * 1-O-CO- * 2.

[Liquid crystal composition]
The liquid crystal composition of the present invention has a liquid crystal compound having reverse wavelength dispersion (hereinafter, also abbreviated as “reverse wavelength dispersion liquid crystal compound”) and a forward wavelength dispersion and is represented by the following formula (I). (Hereinafter, abbreviated as “normal wavelength dispersing compound (I)”).
R ¹ -C (＝ O) -Cy ¹ -Cy ² -C (＝ O) -R ² (I)
Here, in the above formula (I), Cy ¹ and Cy ² represent a 1,4-cyclohexylene group which may have a substituent, and R ¹ and R ² are each independently a hydrogen atom, Alternatively, it represents a substituent.

In the present invention, as described above, by using a liquid crystal composition containing a forward wavelength dispersing compound (I) together with a reverse wavelength dispersing liquid crystal compound, the formed optically anisotropic film has good wet heat durability. Becomes
Although this is not clear in detail, the present inventors speculate as follows.
In other words, it is considered that the forward wavelength dispersing compound (I) has a structure in which cyclohexane rings are connected to each other by a single bond, thereby having a rigid molecular structure and exhibiting a high hydrophobic effect. . Therefore, the optically anisotropic film formed from the liquid crystal composition containing the forward wavelength dispersing compound (I) together with the reverse wavelength dispersing liquid crystal compound exhibits high hydrophobicity and suppresses water intrusion. It is considered that as a result, the wet heat durability was improved.
Hereinafter, each component of the liquid crystal composition of the present invention will be described in detail.

(Inverse wavelength dispersive liquid crystal compound)
The reverse wavelength dispersive liquid crystal compound contained in the liquid crystal composition of the present invention is not particularly limited as long as it has a reverse wavelength dispersibility.
Here, in the present specification, the term “liquid crystal compound exhibiting reverse wavelength dispersion” refers to the measurement of in-plane retardation (Re) value at a specific wavelength (visible light range) of a retardation film produced using the same. In this case, it means that the Re value becomes equal or higher as the measurement wavelength increases.
On the other hand, the “compound exhibiting normal wavelength dispersibility” refers to a measurement wavelength when an in-plane retardation (Re) value at a specific wavelength (visible light range) of a retardation film manufactured using the compound is measured. Means that the Re value decreases as the value increases.

The type of the liquid crystal compound exhibiting the reverse wavelength dispersion is not particularly limited, but can be classified into a rod type (a rod liquid crystal compound) and a disk type (a disk liquid crystal compound) according to its shape. Furthermore, there are low molecular type and high molecular type respectively. A polymer generally refers to a polymer having a degree of polymerization of 100 or more (polymer physics / phase transition dynamics, Masao Doi, page 2, Iwanami Shoten, 1992).
In the present invention, any liquid crystal compound can be used. Two or more rod-shaped liquid crystal compounds, two or more disc-shaped liquid crystal compounds, or a mixture of a rod-shaped liquid crystal compound and a disc-shaped liquid crystal compound may be used.

In the present invention, the reverse wavelength dispersive liquid crystal compound is further improved in reverse wavelength dispersibility, and because the wet heat durability of the formed optically anisotropic film becomes better, the reverse wavelength dispersive liquid crystal compound is And a compound represented by the following formula (II).
L ¹ -SP ^1- (D ⁵ -A ¹ -D ³ -G ¹ -D ¹ -Ar-D ² ) _m -G ² -D ⁴ -A ² -D ⁶ -SP ² -L ^2. II)

In the above formula (II), m represents an integer of 1 to 10. When m is an integer of 2 to 10, a plurality of symbols in the formula may be the same or different.
In the formula (II), D ¹ , D ² , D ³ , D ⁴ , D ⁵ and D ⁶ each independently represent a single bond or —CO—, —O—, —S—, and —. ^{^{C (= S) -, -}} CR 1 R 2 -, - CR 3 = CR 4 -, - NR 5 -, or a divalent linking group formed from these two or more ^{thereof, R} 1 ~ R ⁵ each independently represents a hydrogen atom, a fluorine atom, or an alkyl group having 1 to 4 carbon atoms.
In the above formula (II), G ¹ and G ² each independently represent a divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms which may have a substituent, One or more of —CH ₂ — constituting the hydrocarbon group may be substituted with —O—, —S—, or —NH—.
In the formula (II), A ¹ and A ² each independently represent an aromatic ring having 6 or more carbon atoms which may have a substituent, or a carbon number which may have a substituent. Represents 6 or more cycloalkane rings.
In the above formula (II), SP ¹ and SP ² each independently represent a single bond, a linear or branched alkylene group having 1 to 12 carbon atoms, or a linear alkylene group having 1 to 12 carbon atoms. Alternatively, a divalent linkage in which at least one of —CH ₂ — constituting a branched alkylene group is substituted with —O—, —S—, —NH—, —N (Q) —, or —CO— Represents a group, and Q represents a substituent.
In the formula (II), L ¹ and L ² each independently represent a monovalent organic group, and at least one of L ¹ and L ² represents a polymerizable group. However, when Ar is an aromatic ring represented by the following formula (Ar-3), at least one of L ¹ and L ² and L ³ and L ^{4 in} the following formula (Ar-3) is a polymerizable group. Represents

In the above formula (II), m represents an integer of 1 to 10, preferably an integer of 1 to 5, more preferably 1 or 2, and still more preferably 1.
As described above, when m is an integer of 2 to 10, a plurality of symbols in the above formula (II) may be the same or different. Specifically, for example, when m is 2, the formula (II) 2 pieces of A ¹ present in may be one different even the same.

In the above formula (II), examples of the divalent linking group represented by D ¹ , D ² , D ³ , D ⁴ , D ⁵ and D ⁶ include —CO—, —O—, —CO—O—, ^{^{^{^{-C (= S) O -,}}}} - CR 1 R 2 -, - CR 1 R 2 -CR 1 R 2 -, - O-CR 1 R 2 -, - CR 1 R 2 -O-CR 1 R 2 - ^{^{^{^{, -CO-O-CR 1 R}}}} 2 -, - O-CO-CR 1 R 2 -, - CR 1 R 2 -O-CO-CR 1 R 2 -, - CR 1 R 2 -CO-O-CR ¹ R ² —, —NR ⁵ —CR ¹ R ² —, and —CO—NR ⁵ —. R ¹ , R ² and R ⁵ each independently represent a hydrogen atom, a fluorine atom, or an alkyl group having 1 to 4 carbon atoms.
Among these, it is preferable to be any of —CO—, —O—, and —CO—O—.

In the above formula (II), the divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms represented by G ¹ and G ² is preferably a 5- or 6-membered ring. The alicyclic hydrocarbon group may be saturated or unsaturated, but is preferably a saturated alicyclic hydrocarbon group. As the divalent alicyclic hydrocarbon group represented by G ¹ and G ² , for example, the description in paragraph [0078] of JP-A-2012-21068 can be referred to, and the contents thereof are incorporated herein. .

In the above formula (II), examples of the substituent which G ¹ and G ² may have on the divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms include, for example, an alkyl group and an alkoxy group , A halogen atom and the like.
As the alkyl group, for example, a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms is preferable, and an alkyl group having 1 to 8 carbon atoms (eg, methyl group, ethyl group, propyl group, isopropyl group) , N-butyl group, isobutyl group, sec-butyl group, t-butyl group, cyclohexyl group and the like), more preferably an alkyl group having 1 to 4 carbon atoms, and a methyl group or an ethyl group. Is particularly preferred.
As the alkoxy group, for example, an alkoxy group having 1 to 18 carbon atoms is preferable, and an alkoxy group having 1 to 8 carbon atoms (eg, methoxy group, ethoxy group, n-butoxy group, methoxyethoxy group and the like) is more preferable. It is more preferably an alkoxy group of the formulas 1 to 4, and particularly preferably a methoxy group or an ethoxy group.
Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like, and among them, a fluorine atom and a chlorine atom are preferable.

In the formula (II), examples of the aromatic ring having 6 or more carbon atoms represented by A ¹ and A ² include an aromatic hydrocarbon ring such as a benzene ring, a naphthalene ring, an anthracene ring, and a phenanthroline ring; a furan ring; Aromatic heterocycles such as a pyrrole ring, a thiophene ring, a pyridine ring, a thiazole ring, and a benzothiazole ring; Among them, a benzene ring (for example, a 1,4-phenyl group) is preferable.
In the formula (II), examples of the cycloalkane ring having 6 or more carbon atoms represented by A ¹ and A ² include a cyclohexane ring, a cyclopeptane ring, a cyclooctane ring, a cyclododecane ring, a cyclodocosane ring, and the like. Among them, a cyclohexane ring (eg, a 1,4-cyclohexylene group) is preferable, and a trans-1,4-cyclohexylene group is more preferable.
In addition, with respect to A ¹ and A ² , examples of the substituent which the aromatic ring having 6 or more carbon atoms or the cycloalkane ring having 6 or more carbon atoms may have include G ¹ and G ² in the above formula (II). The same substituents as the substituents that may be included are mentioned.

In the above formula (II), examples of the linear or branched alkylene group having 1 to 12 carbon atoms represented by SP ¹ and SP ² include, for example, methylene group, ethylene group, propylene group, butylene group, pentylene group, hexylene Group, methylhexylene group, heptylene group and the like. As described above, SP ¹ and SP ² each have one or more —CH ₂ — constituting a linear or branched alkylene group having 1 to 12 carbon atoms represented by —O—, —S—, and —NH. —, —N (Q) —, or a divalent linking group substituted with —CO—, and the substituent represented by Q includes G ¹ and G in the above formula (II). And the same substituents as the substituents that ² may have.

In the above formula (II), examples of the monovalent organic group represented by L ¹ and L ² include an alkyl group, an aryl group, and a heteroaryl group. The alkyl group may be linear, branched or cyclic, but is preferably linear. The carbon number of the alkyl group is preferably 1 to 30, more preferably 1 to 20, and still more preferably 1 to 10. The aryl group may be monocyclic or polycyclic, but is preferably a monocyclic ring. The carbon number of the aryl group is preferably from 6 to 25, and more preferably from 6 to 10. Further, the heteroaryl group may be monocyclic or polycyclic. The number of hetero atoms constituting the heteroaryl group is preferably from 1 to 3. The hetero atom constituting the heteroaryl group is preferably a nitrogen atom, a sulfur atom, or an oxygen atom. The heteroaryl group preferably has 6 to 18 carbon atoms, more preferably 6 to 12 carbon atoms. Further, the alkyl group, the aryl group, and the heteroaryl group may be unsubstituted or may have a substituent. Examples of the substituent include the same substituents that G ¹ and G ² in the above formula (II) may have.

In the formula (II), the polymerizable group represented by at least one of L ¹ and L ² is not particularly limited, but is preferably a polymerizable group capable of radical polymerization or cationic polymerization.
As the radical polymerizable group, a generally known radical polymerizable group can be used, and preferable examples thereof include an acryloyl group and a methacryloyl group. In this case, it is known that an acryloyl group generally has a high polymerization rate, and an acryloyl group is preferable from the viewpoint of improving productivity. However, a methacryloyl group can be similarly used as the polymerizable group.
As the cationic polymerizable group, generally known cationic polymerizable can be used, specifically, an alicyclic ether group, a cyclic acetal group, a cyclic lactone group, a cyclic thioether group, a spiro ortho ester group, and And a vinyloxy group. Among them, an alicyclic ether group or a vinyloxy group is preferable, and an epoxy group, an oxetanyl group, or a vinyloxy group is particularly preferable.
Examples of particularly preferred polymerizable groups include the following.

In the above formula (II), for the reason that the durability is good, both L ¹ and L ² in the above formula (II) are preferably a polymerizable group, and are preferably an acryloyl group or a methacryloyl group. More preferred.

On the other hand, in the above formula (II), Ar represents any aromatic ring selected from the group consisting of groups represented by the following formulas (Ar-1) to (Ar-5). In the following formulas (Ar-1) to (Ar-5), * represents a bonding position to D ¹ or D ² in the above formula (II).

In the above formula (Ar-1), Q ¹ represents N or CH, Q ² represents —S—, —O—, or —N (R ⁶ ) —, and R ⁶ is a hydrogen atom or Represents an alkyl group having 1 to 6 carbon atoms, and Y ¹ represents an aromatic hydrocarbon group having 6 to 12 carbon atoms or an aromatic heterocyclic group having 3 to 12 carbon atoms, which may have a substituent. Represent.
Specific examples of the alkyl group having 1 to 6 carbon atoms represented by R ⁶ include a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group and a tert-butyl group. Group, n-pentyl group, n-hexyl group and the like.
Examples of the aromatic hydrocarbon group having 6 to 12 carbon atoms represented by Y ¹ include an aryl group such as a phenyl group, a 2,6-diethylphenyl group, and a naphthyl group.
Examples of the aromatic heterocyclic group having 3 to 12 carbon atoms represented by Y ¹ include a heteroaryl group such as a thienyl group, a thiazolyl group, a furyl group, and a pyridyl group.
Examples of the substituent that Y ¹ may have include the same substituents that G ¹ and G ² in the above formula (II) may have.

In the above formulas (Ar-1) to (Ar-5), Z ¹ , Z ² and Z ³ each independently represent a hydrogen atom, a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms, A monovalent alicyclic hydrocarbon group having 3 to 20 carbon atoms, a monovalent aromatic hydrocarbon group having 6 to 20 carbon atoms, a halogen atom, a cyano group, a nitro group, —OR ⁷ , —NR ⁸ R ⁹ , or , —SR ¹⁰ , R ⁷ to R ¹⁰ each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and Z ¹ and Z ² may be bonded to each other to form an aromatic ring. Good.
The monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms is preferably an alkyl group having 1 to 15 carbon atoms, more preferably an alkyl group having 1 to 8 carbon atoms, and specifically, a methyl group or an ethyl group. Isopropyl group, tert-pentyl group (1,1-dimethylpropyl group), tert-butyl group, 1,1-dimethyl-3,3-dimethyl-butyl group, and more preferably methyl group, ethyl group, tert-butyl group. Groups are particularly preferred.
Examples of the monovalent alicyclic hydrocarbon group having 3 to 20 carbon atoms include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, cyclodecyl, methylcyclohexyl, ethylcyclohexyl A monocyclic saturated hydrocarbon group such as a cyclobutenyl group, a cyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, a cyclooctenyl group, a cyclodecenyl group, a cyclopentadienyl group, a cyclohexadienyl group, a cyclooctadienyl group, a cyclodecayl group; A monocyclic unsaturated hydrocarbon group such as a diene; a bicyclo [2.2.1] heptyl group, a bicyclo [2.2.2] octyl group, a tricyclo [5.2.1.0 ^2,6 ] decyl group; Tricyclo [3.3.1.1 ^3,7 ] decyl group, tetracyclo [6.2.1. ^13,6 . 0 ^2,7 ] dodecyl group, adamantyl group and the like; and polycyclic saturated hydrocarbon groups.
Specific examples of the monovalent aromatic hydrocarbon group having 6 to 20 carbon atoms include a phenyl group, a 2,6-diethylphenyl group, a naphthyl group, and a biphenyl group. (Particularly a phenyl group) is preferred.
Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom and an iodine atom, and among them, a fluorine atom, a chlorine atom and a bromine atom are preferable.
On the other hand, as the alkyl group having 1 to 6 carbon atoms represented by R ⁷ to R ¹⁰ , specifically, for example, methyl group, ethyl group, propyl group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group Group, tert-butyl group, n-pentyl group, n-hexyl group and the like.

In the above formulas (Ar-2) and (Ar-3), A ³ and A ⁴ are each independently a group represented by —O—, —N (R ¹¹ ) —, —S—, and —CO— And R ¹¹ represents a hydrogen atom or a substituent.
Examples of the substituent represented by R ¹¹ include the same substituents that G ¹ and G ² in the above formula (II) may have.

In the above formula (Ar-2), X represents a hydrogen atom or a non-metallic atom of Groups 14 to 16 to which a substituent may be bonded.
Examples of the non-metallic atoms of Groups 14 to 16 represented by X include an oxygen atom, a sulfur atom, a nitrogen atom having a substituent, and a carbon atom having a substituent. Specific examples of the substituent include: Is, for example, an alkyl group, an alkoxy group, an alkyl-substituted alkoxy group, a cyclic alkyl group, an aryl group (eg, a phenyl group, a naphthyl group, etc.), a cyano group, an amino group, a nitro group, an alkylcarbonyl group, a sulfo group, a hydroxyl group, etc. Is mentioned.

In the above formula (Ar-3), D ⁷ and D ⁸ are each independently a single bond or —CO—, —O—, —S—, —C (ＳS) —, —CR ¹ R ² —, —CR ³ ＣＲCR ⁴ —, —NR ⁵ —, or a divalent linking group consisting of a combination of two or more thereof, wherein R ¹ to R ⁵ each independently represent a hydrogen atom, Represents a fluorine atom or an alkyl group having 1 to 4 carbon atoms.
Here, examples of the divalent linking group include those similar to those described for D ¹ , D ² , D ³ , D ⁴ , D ⁵ and D ⁶ in the above formula (II).

In the formula (Ar-3), SP ³ and SP ⁴ each independently represent a single bond, a linear or branched alkylene group having 1 to 12 carbon atoms, or a straight-chain or branched alkylene group having 1 to 12 carbon atoms. Bivalent in which one or more of —CH ₂ — constituting a chain or branched alkylene group is substituted with —O—, —S—, —NH—, —N (Q) —, or —CO— And Q represents a substituent. Examples of the substituent include the same substituents that G ¹ and G ² in the above formula (II) may have.
Here, examples of the alkylene group include those similar to those described for SP ¹ and SP ² in the above formula (II).

Further, in the above formula (Ar-3), L ³ and L ⁴ each independently represent a monovalent organic group, and at least one of L ³ and L ⁴ and L ¹ and L ^{2 in} the above formula (II) One represents a polymerizable group.
Examples of the monovalent organic group include the same as those described for L ¹ and L ² in the above formula (II).
Further, the polymerizable group include the same as those described in L ¹ and L ² in the formula (II).

In the above formulas (Ar-4) to (Ar-5), Ax has at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocyclic ring and has 2 to 30 carbon atoms. Represents an organic group.
In the formulas (Ar-4) to (Ar-5), Ay represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms which may have a substituent, or an aromatic hydrocarbon ring and an aromatic hydrocarbon ring. Represents an organic group having 2 to 30 carbon atoms and having at least one aromatic ring selected from the group consisting of group heterocycles.
Here, the aromatic ring in Ax and Ay may have a substituent, and Ax and Ay may combine to form a ring.
Q ³ represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms which may have a substituent.
Examples of Ax and Ay include those described in paragraphs [0039] to [0095] of Patent Document 2 (WO 2014/010325).
Examples of the alkyl group having 1 to 6 carbon atoms represented by Q ³ include, for example, a methyl group, an ethyl group, a propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec-butyl group, and a tert group. -Butyl group, n-pentyl group, n-hexyl group and the like, and the substituent is the same as the substituent which G ¹ and G ² in the above formula (II) may have. Is mentioned.

As the reverse dispersible liquid crystal compound represented by the formula (II), specifically, for example, a compound represented by the general formula (1) described in JP-A-2010-084032 (particularly, a paragraph number [ 0067] to [0073]), compounds represented by the general formula (II) described in JP-A-2016-053709 (especially, compounds described in paragraphs [0036] to [0043]), And compounds represented by the general formula (1) described in JP-A-2016-081035 (particularly, compounds described in paragraphs [0043] to [0055]).

In the present invention, m in the above formula (II) represents 1, and A ¹ and A ² in the above formula (II) each independently represent a carbon number for improving the reverse wavelength dispersion. It is preferably a polymerizable liquid crystal compound representing 6 or more cycloalkane rings, m in the above formula (II) represents ^1, and A ¹ and A ² in the above formula (II) each independently represent a carbon atom. It is more preferable that the compound is a polymerizable liquid crystal compound which represents a cycloalkane ring of Formula 6 or more, and wherein D ³ and D ⁴ in the above formula (II) each represent a single bond.
Suitable examples of such a polymerizable liquid crystal compound include compounds represented by the following formulas (1) to (12). Specifically, K () in the following formulas (1) to (12) As the side chain structure), compounds having side chain structures shown in Tables 1 and 2 below can be exemplified.
In Tables 1 and 2 below, “*” shown in the side chain structure of K indicates a bonding position with an aromatic ring.
In the following description, a compound represented by the following formula (1) and having a group 1-1 shown in Table 1 below will be referred to as “compound (1-1-1)”, and other compounds will be described. A compound having a structural formula and a group is described in the same manner. For example, a compound represented by the following formula (2) and having a group represented by 2-3 in Table 2 below can be represented as “compound (2-2-3)”.
In the side chain structures represented by 1-2 in Table 1 and 2-2 in Table 2, a group adjacent to an acryloyloxy group and a methacryloyl group is a propylene group (a methyl group is an ethylene group). Substituted group), and represents a mixture of positional isomers having different methyl groups.

In the present invention, m in the above formula (II) represents an integer of 2 to 10, and A ¹ and A ² in the above formula (II) are each independently It is preferable that the polymerizable liquid crystal compound represents a cycloalkane ring having 6 or more carbon atoms, m in the above formula (II) represents an integer of 2 to 10, and A ¹ and A in the above formula (II) ² is more preferably a polymerizable liquid crystal compound each independently representing a cycloalkane ring having 6 or more carbon atoms, and wherein D ³ and D ⁴ in the above formula (II) each represent a single bond. .
Specific examples of such a polymerizable liquid crystal compound include the following compounds. Here, m in the structural formula in the following examples represents an integer of 2 to 10.

[Forward wavelength dispersing compound (I)]
The forward wavelength dispersing compound (I) contained in the liquid crystal composition of the present invention is a compound represented by the following formula (I).
R ¹ -C (＝ O) -Cy ¹ -Cy ² -C (＝ O) -R ² (I)

In the formula (I), Cy ¹ and Cy ² represent a 1,4-cyclohexylene group which may have a substituent.
The substituents that Cy ¹ and Cy ² optionally have in the 1,4-cyclohexylene group include the substituents that G ¹ and G ^{2 in} the above formula (II) may have. And the like.

In the formula (I), R ¹ and R ² each independently represent a hydrogen atom or a substituent (hereinafter, also abbreviated as “substituent R”).

As the substituent R, for example, specifically, for example,
An alkyl group (preferably a linear or branched substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, such as a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a tert-butyl group, an n-octyl group; 2-ethylhexyl group);
Alkenyl group (preferably substituted or unsubstituted alkenyl group having 2 to 30 carbon atoms, for example, vinyl group, allyl group);
An alkynyl group (preferably a substituted or unsubstituted alkynyl group having 2 to 30 carbon atoms, such as an ethynyl group and a propargyl group);
An aryl group (preferably a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, for example, a phenyl group, a p-tolyl group, a naphthyl group);
A heterocyclic group (preferably a monovalent group obtained by removing one hydrogen atom from a 5- or 6-membered substituted or unsubstituted aromatic or non-aromatic heterocyclic compound, more preferably having 3 to 5 carbon atoms; 30 5- or 6-membered aromatic heterocyclic group such as 2-furyl group, 2-thienyl group, 2-pyrimidinyl group and 2-benzothiazolyl group);
Hydroxyl group;
Alkoxy group (preferably substituted or unsubstituted alkoxy group having 1 to 30 carbon atoms, for example, methoxy group, ethoxy group, isopropoxy group, tert-butoxy group, n-octyloxy group, 2-methoxyethoxy group);
Aryloxy group (preferably substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, for example, phenoxy group, 2-methylphenoxy group, 4-tert-butylphenoxy group, 3-nitrophenoxy group, 2-tetra Decanoylaminophenoxy group);
A silyloxy group (preferably a silyloxy group having 3 to 20 carbon atoms, for example, a trimethylsilyloxy group, a tert-butyldimethylsilyloxy group);
A heterocyclic oxy group (preferably a substituted or unsubstituted heterocyclic oxy group having 2 to 30 carbon atoms, a 1-phenyltetrazol-5-oxy group, a 2-tetrahydropyranyloxy group);
An amino group (preferably an amino group, a substituted or unsubstituted alkylamino group having 1 to 30 carbon atoms, a substituted or unsubstituted anilino group having 6 to 30 carbon atoms, for example, an amino group, a methylamino group, a dimethylamino group; , Anilino group, N-methyl-anilino group, diphenylamino group);
A mercapto group;
An alkylthio group (preferably a substituted or unsubstituted alkylthio group having 1 to 30 carbon atoms, for example, a methylthio group, an ethylthio group, an n-hexadecylthio group);
An arylthio group (preferably a substituted or unsubstituted arylthio group having 6 to 30 carbon atoms, for example, a phenylthio group, a p-chlorophenylthio group, an m-methoxyphenylthio group);
A heterocyclic thio group (preferably a substituted or unsubstituted heterocyclic thio group having 2 to 30 carbon atoms, for example, 2-benzothiazolylthio group, 1-phenyltetrazol-5-ylthio group);
And the like.

Among the above substituents R, those having a hydrogen atom may be removed and further substituted with a substituent.
Examples of such a substituent include a halogen atom, an alkyl group, an alkenyl group, an aryl group, a heterocyclic group, a cyano group, a hydroxyl group, a carboxyl group, an alkoxy group, an aryloxy group, a silyloxy group, a heterocyclic oxy group, Acyloxy group, carbamoyloxy group, alkoxycarbonyloxy group, aryloxycarbonyloxy group, amino group, acylamino group, aminocarbonylamino group, alkoxycarbonylamino group, aryloxycarbonylamino group, sulfamoylamino group, alkyl or arylsulfonyl Amino group, mercapto group, alkylthio group, arylthio group, heterocyclic thio group, sulfamoyl group, sulfo group, alkyl or arylsulfinyl group, alkyl or arylsulfonyl group, acyl group, aryloxy Carbonyl group, an alkoxycarbonyl group, a carbamoyl group, an imido group, a phosphino group, phosphinyl group, phosphinyloxy group, phosphinylamino group, and a silyl group.
Further, an embodiment in which a polymerizable group capable of radical polymerization or cationic polymerization is substituted is also preferable. As the radical polymerizable group, a generally known radical polymerizable group can be used, and preferable examples thereof include an acryloyl group and a methacryloyl group. As the cationic polymerizable group, generally known cationic polymerizable can be used, specifically, an alicyclic ether group, a cyclic acetal group, a cyclic lactone group, a cyclic thioether group, a spiro ortho ester group, and And a vinyloxy group. Among them, an alicyclic ether group or a vinyloxy group is preferable, and an epoxy group, an oxetanyl group, or a vinyloxy group is particularly preferable.

Among these, the substituent R is preferably a hydroxyl group, an alkoxy group, an aryloxy group, a heterocyclic oxy group, an amino group, an alkylthio group, an arylthio group, a heterocyclic thio group, and is preferably a hydroxyl group, an alkoxy group, More preferably, it is an aryloxy group or an amino group.

In the present invention, since the aspect ratio of the molecule is increased and the liquid crystal compound of the above-described inverse wavelength-dispersing liquid crystal compound can be aligned with the above-described inverse wavelength-dispersing liquid crystal compound without impairing the liquid crystallinity, The wavelength dispersing compound (I) is preferably a compound represented by any of the following formulas (I-1) to (I-3).
L ¹¹ -SP ¹¹ -D ¹¹ -C (= O) -Cy ¹ -Cy ² -C (= O) -D ¹² -SP ¹² -L ¹² (I-1)
^{^{^{^{L 11 -SP 11 - (D 13}}}} -A 11) p -D 11 -C (= O) -Cy 1 -Cy 2 -C (= O) -D 12 - (A 12 -D 14) q -SP 12 -L ¹² ··· (I-2)
L ^{^¹¹} -SP ¹¹ -D ¹¹ - ^{^{[C (= O) -Cy 1 -Cy}} 2 -C (= O) -D 15 - (A 13 -D 16) r ] _n -C (= O) -Cy ¹ -Cy ² -C (= O) -D ¹² -SP ¹² -L ¹² (I-3)

In the above formula (I-2), p represents an integer of 1 to 3, and q represents an integer of 1 to 3. p and q are each preferably 1 or 2 from the viewpoint of the crystallinity of the obtained forward wavelength-dispersing compound (I) and the compatibility with the above-mentioned reverse wavelength-dispersing liquid crystal compound. And more preferably 1.
In the above formula (I-3), r represents an integer of 1 to 3, and n represents an integer of 1 to 10. r is preferably 1 or 2, and more preferably 1. n is preferably an integer of 2 to 10, more preferably an integer of 2 to 5.
When p is 2 or 3, when q is 2 or 3, when r is 2 or 3, or when n is an integer of 2 to 10, a plurality of p is present in the formula. May be the same or different. Specifically, for example, when p is 2, two A ¹¹ present in the above formula (I-2), or may be different even the same.

In the above formulas (I-1) to (I-3), Cy ¹ and Cy ² represent a 1,4-cyclohexylene group which may have a substituent.
The substituents that Cy ¹ and Cy ² optionally have in the 1,4-cyclohexylene group include the substituents that G ¹ and G ^{2 in} the above formula (II) may have. And the like.

In the above formulas (I-1) to (I-3), D ¹¹ , D ¹² , D ¹³ , D ¹⁴ , D ¹⁵ and D ¹⁶ are each independently a single bond or -CO-,- O -, - S -, - C (= S) -, - CR 1 R 2 -, - CR 3 = CR 4 -, - NR 5 -, or a divalent linking of consisting of two or more thereof And each of R ¹ to R ⁵ independently represents a hydrogen atom, a fluorine atom, or an alkyl group having 1 to 4 carbon atoms.
Here, examples of the divalent linking group include the same groups as described for D ¹ , D ² , D ³ , D ⁴ , D ⁵ and D ⁶ in the above formula (II).

In the formulas (I-1) to (I-3), SP ¹¹ and SP ¹² each independently represent a single bond, a linear or branched alkylene group having 1 to 12 carbon atoms, At least one of —CH ₂ — constituting the linear or branched alkylene group of the formulas 1 to 12 is —O—, —S—, —NH—, —N (Q) —, or —CO— Represents a substituted bivalent linking group, and Q represents a substituent.
Here, examples of the alkylene group include those similar to those described for SP ¹ and SP ² in the above formula (II).

In formulas (I-1) to (I-3), L ¹¹ and L ¹² each independently represent a monovalent hydrogen atom or a polymerizable group.
Here, examples of the polymerizable group include those similar to those described for L ¹ and L ² in the above formula (II).

In the above formulas (I-2) and (I-3), A ¹¹ , A ¹² and A ¹³ each independently represent an aromatic ring having 6 or more carbon atoms which may have a substituent, or Represents an optionally substituted divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, wherein at least one of —CH ₂ — constituting the alicyclic hydrocarbon group is —O—, It may be substituted with S- or -NH-.
Here, the aromatic ring which may having 6 or more carbon atoms have a substituent include the same as those described in A ¹ and A ² in the above-mentioned formula (II).
Examples of the divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms which may have a substituent include the same as those described for G ¹ and G ² in the above formula (II). Is mentioned.
Further, as A ¹¹ , A ¹² and A ¹³ , a group consisting of groups represented by the following formulas (A2-1) to (A2-5) because of excellent rigidity and hydrophobicity (durability) of the molecule. It preferably represents any ring structure selected from

In the above formulas (A2-1) to (A2-5), * represents a bonding position to D.
Further, R ²¹ represents a substituent, and r ²¹ represents an integer of 0 to 4, preferably an integer of 0 to 2, and more preferably 0 or 1.
Further, R ²² represents a substituent, and r22 represents an integer of 0 to 6, preferably an integer of 0 to 2, and more preferably 0 or 1.
R ²³ represents an alkyl group having 1 to 5 carbon atoms, r ²³ represents an integer of 0 to 8, preferably an integer of 0 to 4, and more preferably an integer of 0 to 2. , 0 or 1.

Examples of the substituent represented by R ²¹ in the above formula (A2-1) and R ²² in the above formula (A2-2) include an alkyl group, an alkoxy group, a halogen atom, a cyano group, an alkoxycarbonyl group and the like. Is mentioned.
As the alkyl group, for example, a linear, branched or cyclic alkyl group having 1 to 18 carbon atoms is preferable, and an alkyl group having 1 to 8 carbon atoms (eg, methyl group, ethyl group, propyl group, isopropyl group) , N-butyl group, isobutyl group, sec-butyl group, t-butyl group, cyclohexyl group and the like), more preferably an alkyl group having 1 to 4 carbon atoms, and a methyl group or an ethyl group. Is particularly preferred.
As the alkoxy group, for example, an alkoxy group having 1 to 18 carbon atoms is preferable, and an alkoxy group having 1 to 8 carbon atoms (eg, methoxy group, ethoxy group, n-butoxy group, methoxyethoxy group and the like) is more preferable. It is more preferably an alkoxy group of the formulas 1 to 4, and particularly preferably a methoxy group or an ethoxy group.
Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like, and among them, a fluorine atom and a chlorine atom are preferable.
Examples of the alkoxycarbonyl group include a substituted or unsubstituted alkoxycarbonyl group. As the unsubstituted alkoxycarbonyl group, for example, an alkoxycarbonyl group having 1 to 18 carbon atoms is preferable, and an alkoxycarbonyl group having 1 to 8 carbon atoms ( For example, a methoxycarbonyl group, an ethoxycarbonyl group, an n-butoxycarbonyl group and the like are more preferable. As the substituted alkoxycarbonyl group, for example, an alkoxycarbonyl group substituted by a polymerizable group such as an acryloxybutoxycarbonyl group is preferable.

In the above formulas (A2-3) to (A2-5), examples of the alkyl group having 1 to 5 carbon atoms represented by R ²³ include, for example, methyl group, ethyl group, propyl group, isopropyl group, n -Butyl group and the like.

Specific examples of the compound represented by the above formula (I-1) include the following compounds.

Specific examples of the compound represented by the above formula (I-2) include the following compounds.

Specific examples of the compound represented by the above formula (I-3) include the following compounds.

In the present invention, the content of the forward wavelength-dispersing compound (I) is preferably 0.5 to 100 parts by mass, and more preferably 1 to 50 parts by mass, based on 100 parts by mass of the above-mentioned reverse wavelength-dispersing liquid crystal compound. Parts by mass, more preferably 2 to 50 parts by mass.

(Polymerization initiator)
The liquid crystal composition of the present invention preferably contains a polymerization initiator.
The polymerization initiator used is preferably a photopolymerization initiator capable of initiating a polymerization reaction by ultraviolet irradiation.
Examples of the photopolymerization initiator include α-carbonyl compounds (described in US Pat. Nos. 2,367,661 and 2,367,670), acyloin ethers (described in US Pat. No. 2,448,828), and α-hydrocarbon-substituted aromatics Group acyloin compounds (described in US Pat. No. 2,722,512), polynuclear quinone compounds (described in US Pat. Nos. 3,046,127 and 2,951,758), and a combination of triarylimidazole dimer and p-aminophenyl ketone (US Pat. No. 3549367), acridine and phenazine compounds (JP-A-60-105667, US Pat. No. 4,239,850) and oxadiazole compounds (US Pat. No. 4,221,970), acylphosphines Oxide compounds (Japanese Patent Publication No. Sho 6 JP-A-3-40799, JP-B-5-29234, JP-A-10-95788, JP-A-10-29997) and the like.
In the present invention, it is also preferable that the polymerization initiator is an oxime-type polymerization initiator, and specific examples thereof include the initiators described in paragraphs [0049] to [0052] of WO2017 / 170443. Agents.

〔solvent〕
The liquid crystal composition of the present invention preferably contains a solvent from the viewpoint of workability for forming an optically anisotropic film and the like.
Specific examples of the solvent include ketones (eg, acetone, 2-butanone, methyl isobutyl ketone, cyclohexanone, cyclopentanone, etc.), ethers (eg, dioxane, tetrahydrofuran, etc.), aliphatic hydrocarbons (Eg, hexane), alicyclic hydrocarbons (eg, cyclohexane), aromatic hydrocarbons (eg, toluene, xylene, trimethylbenzene, etc.), and halogenated carbons (eg, dichloromethane, dichloroethane, dichlorobenzene) , Chlorotoluene, etc.), esters (eg, methyl acetate, ethyl acetate, butyl acetate, etc.), water, alcohols (eg, ethanol, isopropanol, butanol, cyclohexanol, etc.), and cellosolves (eg, methyl cellosolve, ethyl cello). Rubose), cellosolve acetates, sulfoxides (eg, dimethyl sulfoxide), amides (eg, dimethylformamide, dimethylacetamide, etc.), and the like. These may be used alone, or two or more kinds may be used. You may use together.

(Leveling agent)
The liquid crystal composition of the present invention preferably contains a leveling agent from the viewpoint of keeping the surface of the optically anisotropic film smooth and easily controlling the alignment.
Such a leveling agent is preferably a fluorine-based leveling agent or a silicon-based leveling agent because of its high leveling effect with respect to the added amount. From the viewpoint of preventing bleeding (bloom and bleed), the fluorine-based leveling agent is preferred. Is more preferable.
Specific examples of the leveling agent include, for example, the compounds described in paragraphs [0079] to [0102] of JP-A-2007-069471 and the general formula (JP-A-2013-047204). Compounds represented by I) (especially compounds described in paragraphs [0020] to [0032]), and compounds represented by formula (I) described in JP-A-2012-211306 (especially [0022] To [0029], the liquid crystal alignment accelerator represented by the general formula (I) described in JP-A-2002-129162 (particularly [0076] to [0078] and [0082] to [0084] Compounds described in paragraph (1), compounds represented by general formulas (I), (II) and (III) described in JP-A-2005-099248 (especially 0092] ~ [0096] compounds described in Paragraph), and the like. In addition, it may have a function as an orientation control agent described later.

(Orientation control agent)
The liquid crystal composition of the present invention can contain an alignment controlling agent, if necessary.
The alignment control agent can form various alignment states such as homeotropic alignment (vertical alignment), inclined alignment, hybrid alignment, and cholesteric alignment in addition to the homogeneous alignment. It can be realized with precise control.

As the alignment control agent that promotes homogeneous alignment, for example, a low molecular alignment control agent or a high molecular alignment control agent can be used.
Examples of the low-molecular alignment controlling agent include, for example, paragraphs [0009] to [0083] of JP-A-2002-20363, paragraphs [0111] to [0120] of JP-A-2006-106662, and JP-A-2012. The description in paragraphs [0021] to [0029] of JP-A-211306 can be referred to, and the contents thereof are incorporated in the specification of the present application.
As the polymer orientation controlling agent, for example, refer to paragraphs [0021] to [0057] of JP-A-2004-198511 and paragraphs [0121] to [0167] of JP-A-2006-106662. And the contents of which are incorporated herein.

Examples of the alignment controlling agent for forming or promoting homeotropic alignment include a boronic acid compound and an onium salt compound. Specifically, JP-A-2008-225281, paragraphs [0023] to [0032]. JP-A-2012-208397, paragraphs [0052] to [0058], JP-A-2008-026730, paragraphs [0024] to [0055], and JP-A-2016-193869, paragraphs [0043] to [0055]. The compounds described in paragraphs and the like can be referred to, and the contents thereof are incorporated in the present specification.

On the other hand, the cholesteric orientation can be realized by adding a chiral agent to the polymerizable composition of the present invention, and the turning direction of the cholesteric orientation can be controlled by the direction of the chirality. In addition, the pitch of the cholesteric alignment can be controlled according to the alignment regulating force of the chiral agent.

When the alignment controlling agent is contained, the content is preferably 0.01 to 10% by mass, more preferably 0.05 to 5% by mass, based on the total solid content in the liquid crystal composition. . When the content is in this range, a uniform and highly transparent optically anisotropic film having no precipitation, phase separation, or alignment defect can be obtained while achieving a desired orientation state.
These alignment controlling agents can further provide a polymerizable functional group, particularly a polymerizable functional group capable of polymerizing with the polymerizable liquid crystal compound constituting the liquid crystal composition of the present invention.

[Other components]
The liquid crystal composition of the present invention may contain components other than the above-described components. Agents and crosslinking agents.

[Optical anisotropic film]
The optically anisotropic film of the present invention is an optically anisotropic film obtained by polymerizing the above-mentioned liquid crystal composition of the present invention.
Examples of the method for forming the optically anisotropic film include a method in which the liquid crystal composition of the present invention described above is brought into a desired alignment state, and then fixed by polymerization.
Here, the polymerization conditions are not particularly limited, but it is preferable to use ultraviolet rays in the polymerization by light irradiation. The irradiation amount is preferably from 10 mJ / cm ² to 50 J / cm ² , more preferably from 20 mJ / cm ² to 5 J / cm ² , even more preferably from 30 mJ / cm ² to 3 J / cm ^2. , 50 to 1000 mJ / cm ² . Further, in order to accelerate the polymerization reaction, the reaction may be carried out under heating conditions.
In the present invention, the optically anisotropic film can be formed on any support of the optical film of the present invention described later or on the polarizer of the polarizing plate of the present invention described later.

The optically anisotropic film of the present invention preferably satisfies the following formula (III).
0.50 <Re (450) / Re (550) <1.00 (III)
Here, in the above formula (III), Re (450) represents in-plane retardation of the optically anisotropic film at a wavelength of 450 nm, and Re (550) represents in-plane retardation of the optically anisotropic film at a wavelength of 550 nm. Represents a date. In addition, in this specification, when the measurement wavelength of the retardation is not specified, the measurement wavelength is 550 nm.
Further, the values of the in-plane retardation and the retardation in the thickness direction refer to values measured using AxoScan OPMF-1 (manufactured by Optoscience) using light of a measurement wavelength.
Specifically, by inputting the average refractive index ((Nx + Ny + Nz) / 3) and the film thickness (d (μm)) with AxoScan OPMF-1,
Slow axis direction (°)
Re (λ) = R0 (λ)
Rth (λ) = ((nx + ny) / 2−nz) × d
Is calculated.
Note that R0 (λ) is displayed as a numerical value calculated by AxoScan OPMF-1 and means Re (λ).

光学 The optically anisotropic film of the present invention is preferably a positive A plate or a positive C plate, and more preferably a positive A plate.

Here, the positive A plate (positive A plate) and the positive C plate (positive C plate) are defined as follows.
The refractive index in the direction of the slow axis in the plane of the film (the direction in which the refractive index becomes maximum in the plane) is nx, the refractive index in the direction orthogonal to the in-plane slow axis in the plane is ny, and the refractive index in the thickness direction Assuming that the ratio is nz, the positive A plate satisfies the relationship of Expression (A1), and the positive C plate satisfies the relationship of Expression (C1). The positive A plate has a positive Rth value, and the positive C plate has a negative Rth value.
Formula (A1) nx> ny ≒ nz
Formula (C1) nz> nx ≒ ny
Note that the above “≒” includes not only a case where both are completely the same but also a case where both are substantially the same.
“Substantially the same” means that, for example, (ny−nz) × d (where d is the thickness of the film) in the positive A plate is −10 to 10 nm, preferably −5 to 5 nm. “Nx 場合 nz” is included in “ny の nz”, and the case where (nx−nz) × d is −10 to 10 nm, preferably -5 to 5 nm is also included in “nx ≒ nz”. In the case of a positive C plate, for example, (nx−ny) × d (where d is the thickness of the film) is 0 to 10 nm, preferably 0 to 5 nm.

When the optically anisotropic film of the present invention is a positive A plate, Re (550) is preferably from 100 to 180 nm, more preferably from 120 to 160 nm, from the viewpoint of functioning as a λ / 4 plate. The thickness is more preferably from 130 to 150 nm, particularly preferably from 130 to 140 nm.
Here, the “λ / 4 plate” is a plate having a λ / 4 function, and specifically, a function of converting linearly polarized light having a specific wavelength into circularly polarized light (or converting circularly polarized light into linearly polarized light). Is a plate having

[Optical film]
The optical film of the present invention is an optical film having the optically anisotropic film of the present invention.
FIGS. 1A, 1B, and 1C (hereinafter, these drawings are abbreviated to “FIG. 1” when no particular distinction is required) are schematic cross-sectional views each showing an example of the optical film of the present invention.
Note that FIG. 1 is a schematic diagram, and the relationship of the thickness and the positional relationship of each layer does not always correspond to the actual one, and the support, the alignment film, and the hard coat layer shown in FIG. It is a member.
The optical film 10 shown in FIG. 1 has a support 16, an alignment film 14, and an optically anisotropic film 12 in this order.
1B, the optical film 10 may have a hard coat layer 18 on the side of the support 16 opposite to the side on which the alignment film 14 is provided. As shown in FIG. A hard coat layer 18 may be provided on the side of the optically anisotropic film 12 opposite to the side on which the alignment film 14 is provided.
Hereinafter, various members used for the optical film of the present invention will be described in detail.

(Optical anisotropic film)
The optically anisotropic film of the optical film of the present invention is the above-described optically anisotropic film of the present invention.
In the optical film of the present invention, the thickness of the optically anisotropic film is not particularly limited, but is preferably from 0.1 to 10 μm, more preferably from 0.5 to 5 μm.

(Support)
As described above, the optical film of the present invention may have a support as a substrate for forming an optically anisotropic film.
Such a support is preferably transparent, and specifically, preferably has a light transmittance of 80% or more.

Examples of such a support include a glass substrate and a polymer film. Examples of the material of the polymer film include a cellulose-based polymer and an acrylic-based polymer having an acrylate polymer such as polymethyl methacrylate and a lactone ring-containing polymer. Polymer; thermoplastic norbornene-based polymer; polycarbonate-based polymer; polyester-based polymer such as polyethylene terephthalate and polyethylene naphthalate; styrene-based polymer such as polystyrene, acrylonitrile-styrene copolymer (AS resin); polyethylene, polypropylene, ethylene-propylene Polyolefin polymers such as polymers; vinyl chloride polymers; amide polymers such as nylon and aromatic polyamide; imide polymers; sulfone polymers; Polyether ether ketone polymer; polyphenylene sulfide polymer; vinylidene chloride polymer; vinyl alcohol polymer; vinyl butyral polymer; arylate polymer; polyoxymethylene polymer; epoxy polymer; Mixed polymers are included.
Further, a mode in which a polarizer described later also serves as such a support may be used.

In the present invention, the thickness of the support is not particularly limited, but is preferably 5 to 60 μm, more preferably 5 to 30 μm.

(Alignment film)
When the optical film of the present invention has any of the above-mentioned supports, it is preferable to have an alignment film between the support and the optically anisotropic film. Note that the above-described support may also function as an alignment film.

The alignment film generally has a polymer as a main component. As the polymer material for the alignment film, there are many documents, and many commercially available products can be obtained.
The polymer material used in the present invention is preferably polyvinyl alcohol or polyimide, and derivatives thereof. Particularly, a modified or unmodified polyvinyl alcohol is preferable.
Examples of the alignment film that can be used in the present invention include those described in WO 01/88574, page 43, line 24 to page 49, line 8; paragraphs [0071] to [0095] of Japanese Patent No. 3907735. Modified polyvinyl alcohol; liquid crystal alignment films formed by a liquid crystal alignment agent described in JP-A-2012-155308, and the like.

In the present invention, it is also preferable to use a photo-alignment film as the alignment film because it is possible to prevent deterioration of the surface state by not contacting the surface of the alignment film when the alignment film is formed.
The photo-alignment film is not particularly limited, but a polymer material such as a polyamide compound or a polyimide compound described in paragraphs [0024] to [0043] of WO 2005/096041; described in JP-A-2012-155308. A liquid crystal alignment film formed by a liquid crystal alignment agent having a photo-alignable group as described above; LPP-JP265CP (trade name, manufactured by Rolic Technologies) can be used.

In the present invention, the thickness of the alignment film is not particularly limited. However, from the viewpoint of forming an optically anisotropic film having a uniform film thickness by relaxing surface irregularities that may be present on the support. It is preferably from 0.01 to 10 μm, more preferably from 0.01 to 1 μm, and even more preferably from 0.01 to 0.5 μm.

[Hard coat layer]
The optical film of the present invention preferably has a hard coat layer to impart physical strength to the film. Specifically, the support may have a hard coat layer on the side opposite to the side on which the alignment film is provided (see FIG. 1B), and may have a hard coat layer on the side of the optically anisotropic film where the alignment film is provided. May have a hard coat layer on the opposite side (see FIG. 1C).
As the hard coat layer, those described in paragraphs [0190] to [0196] of JP-A-2009-98658 can be used.

(Other optically anisotropic films)
The optical film of the present invention may have another optically anisotropic film separately from the optically anisotropic film of the present invention.
That is, the optical film of the present invention may have a laminated structure of the optically anisotropic film of the present invention and another optically anisotropic film.
Examples of such another optically anisotropic film include an optically anisotropic film obtained by using the above-mentioned polymerizable liquid crystal compound without compounding the above-mentioned compound (I).

(UV absorber)
The optical film of the present invention preferably contains an ultraviolet (UV) absorber in consideration of the influence of external light (particularly, ultraviolet light).
The ultraviolet absorber may be contained in the optically anisotropic film of the present invention, or may be contained in a member other than the optically anisotropic film constituting the optical film of the present invention. As a member other than the optically anisotropic film, for example, a support is preferably exemplified.
As the ultraviolet absorbent, any conventionally known ultraviolet absorbent capable of exhibiting an ultraviolet absorbing property can be used. Among such ultraviolet absorbers, a benzotriazole-based or hydroxyphenyltriazine-based ultraviolet absorber may be used from the viewpoint of obtaining a high ultraviolet absorbing ability (ultraviolet ray cutting ability) used in an image display device. preferable.
Further, in order to widen the absorption range of ultraviolet rays, two or more ultraviolet absorbers having different maximum absorption wavelengths can be used in combination.
Specific examples of the ultraviolet absorber include compounds described in paragraphs [0258] to [0259] of JP-A-2012-18395 and paragraphs [0055] to [0105] of JP-A-2007-72163. And the like.
As commercial products, Tinuvin 400, Tinuvin 405, Tinuvin 460, Tinuvin 477, Tinuvin 479, and Tinuvin 1577 (all manufactured by BASF) can be used.

[Polarizer]
The polarizing plate of the present invention has the above-described optical film of the present invention and a polarizer.
When the optically anisotropic film of the present invention is a λ / 4 plate (positive A plate), the polarizing plate of the present invention can be used as a circular polarizing plate.
When the optically anisotropic film of the present invention is a λ / 4 plate (positive A plate), the polarizing plate of the present invention has a slow axis of the λ / 4 plate and an absorption axis of a polarizer described later. Is preferably 30 to 60 °, more preferably 40 to 50 °, even more preferably 42 to 48 °, and particularly preferably 45 °.
Here, the “slow axis” of the λ / 4 plate means the direction in which the refractive index is maximum in the plane of the λ / 4 plate, and the “absorption axis” of the polarizer means the direction in which the absorbance is highest. I do.

(Polarizer)
The polarizer included in the polarizing plate of the present invention is not particularly limited as long as it has a function of converting light into specific linearly polarized light, and a conventionally known absorption polarizer and reflection polarizer can be used. .
As the absorption polarizer, an iodine-based polarizer, a dye-based polarizer using a dichroic dye, a polyene-based polarizer, and the like are used. Iodine-based polarizers and dye-based polarizers include coating polarizers and stretched polarizers, both of which can be applied.Polarized light produced by adsorbing iodine or a dichroic dye on polyvinyl alcohol and stretching. Children are preferred.
Further, as a method of obtaining a polarizer by stretching and dyeing in a state of a laminated film having a polyvinyl alcohol layer formed on a substrate, Japanese Patent Nos. 5048120, 5143918, 4691205, and Japanese Patent No. 4751481 and Japanese Patent No. 4751486 can be cited, and known techniques relating to these polarizers can also be preferably used.
As the reflective polarizer, a polarizer in which thin films having different birefringence are stacked, a wire grid polarizer, a polarizer in which a cholesteric liquid crystal having a selective reflection region and a quarter-wave plate are used, and the like are used.
Among them, polyvinyl alcohol-based resins (polymers containing —CH ₂ —CHOH— as a repeating unit. In particular, at least one selected from the group consisting of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, in terms of better adhesion. Is preferable.

In the present invention, the thickness of the polarizer is not particularly limited, but is preferably 3 μm to 60 μm, more preferably 5 μm to 30 μm, and still more preferably 5 μm to 15 μm.

(Adhesive layer)
In the polarizing plate of the present invention, an adhesive layer may be disposed between the optically anisotropic film in the optical film of the present invention and the polarizer.
Examples of the pressure-sensitive adhesive layer used for laminating the optically anisotropic film and the polarizer include, for example, a ratio of a storage elastic modulus G ′ and a loss elastic modulus G ″ (tan δ = G "/ G ') is 0.001 to 1.5, and includes so-called pressure-sensitive adhesives, substances that easily creep, and the like. Examples of the pressure-sensitive adhesive that can be used in the present invention include, but are not limited to, polyvinyl alcohol-based pressure-sensitive adhesives.

[Image display device]
The image display device of the present invention is an image display device having the optical film of the present invention or the polarizing plate of the present invention.
The display element used in the image display device of the present invention is not particularly limited, and includes, for example, a liquid crystal cell, an organic electroluminescence (hereinafter abbreviated as “EL”) display panel, a plasma display panel, and the like.
Among these, a liquid crystal cell and an organic EL display panel are preferable, and a liquid crystal cell is more preferable. That is, the image display device of the present invention is preferably a liquid crystal display device using a liquid crystal cell as a display element, an organic EL display device using an organic EL display panel as a display element, and a liquid crystal display device is preferred. More preferred.

(Liquid crystal display)
A liquid crystal display device as an example of the image display device of the present invention is a liquid crystal display device including the above-described polarizing plate of the present invention and a liquid crystal cell.
In the present invention, among the polarizing plates provided on both sides of the liquid crystal cell, it is preferable to use the polarizing plate of the present invention as the front polarizing plate, and the polarizing plate of the present invention as the front and rear polarizing plates. It is more preferable to use
Hereinafter, the liquid crystal cell constituting the liquid crystal display device will be described in detail.

<Liquid crystal cell>
The liquid crystal cell used for the liquid crystal display device is preferably a VA (Vertical Alignment) mode, an OCB (Optically Compensated Bend) mode, an IPS (In-Plane-Switching) mode, or a TN (Twisted Nematic). However, the present invention is not limited to this.
In the TN mode liquid crystal cell, the rod-like liquid crystalline molecules are substantially horizontally aligned when no voltage is applied, and further twist-aligned at 60 to 120 °. TN mode liquid crystal cells are most frequently used as color TFT liquid crystal display devices, and are described in many documents.
In a VA mode liquid crystal cell, rod-like liquid crystalline molecules are substantially vertically aligned when no voltage is applied. The VA mode liquid crystal cell includes (1) a VA mode liquid crystal cell in a narrow sense in which rod-like liquid crystal molecules are aligned substantially vertically when no voltage is applied and substantially horizontally when a voltage is applied. 176625) and (2) a liquid crystal cell (SID97, Digest of tech. Papers (preparations) 28 (1997) 845) in which the VA mode is multi-domain (for MVA mode) in order to enlarge the viewing angle. ), (3) a liquid crystal cell (n-ASM mode) in which rod-like liquid crystal molecules are substantially vertically aligned when no voltage is applied, and twisted multi-domain alignment when voltage is applied (Preprints 58 to 59 of the Japanese Liquid Crystal Symposium) (1998)) and (4) SURVIVAL mode liquid crystal cell (presented at LCD International 98). Further, any of a PVA (Patterned Vertical Alignment) type, a photo alignment type (Optical Alignment), and a PSA (Polymer-Sustained Alignment) may be used. Details of these modes are described in JP-A-2006-215326 and JP-T-2008-538819.
In the IPS mode liquid crystal cell, rod-shaped liquid crystal molecules are oriented substantially parallel to the substrate, and the liquid crystal molecules respond planarly when an electric field parallel to the substrate surface is applied. In the IPS mode, black display is performed when no electric field is applied, and the absorption axes of the pair of upper and lower polarizing plates are orthogonal. Japanese Patent Application Laid-Open Nos. H10-54982, H11-202323, and H9-292522 disclose a method of using an optical compensation sheet to reduce leakage light during black display in an oblique direction and improve the viewing angle. And JP-A-11-133408, JP-A-11-305217, and JP-A-10-307291.

[Organic EL display]
As an organic EL display device that is an example of the image display device of the present invention, for example, from the viewing side, a polarizer, a λ / 4 plate (positive A plate) made of the optically anisotropic film of the present invention, and an organic EL device A mode in which a display panel and a display panel are provided in this order is preferably exemplified.
The organic EL display panel is a display panel configured using an organic EL element having an organic light-emitting layer (organic electroluminescent layer) sandwiched between electrodes (between a cathode and an anode). The configuration of the organic EL display panel is not particularly limited, and a known configuration is employed.

本 Hereinafter, the present invention will be described in more detail with reference to Examples. Materials, usage amounts, ratios, processing contents, processing procedures, and the like shown in the following examples can be appropriately changed without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be construed as being limited by the following examples.

[Example 1]
<Preparation of alignment film P-1>
The following coating liquid for forming an alignment film P-1 was continuously applied onto a commercially available triacetyl cellulose film “Z-TAC” (manufactured by FUJIFILM Corporation) using a # 2.4 wire bar. .
Next, the support on which the coating film has been formed is dried with hot air at 140 ° C. for 120 seconds, and subsequently irradiated with polarized ultraviolet rays (10 mJ / cm ² , using an ultrahigh pressure mercury lamp) to form an alignment film P-1. did.
─────────────────────────────────
(Coating solution for forming alignment film P-1)
─────────────────────────────────
-100.00 parts by mass of the following polymer PA-1-16.50 parts by mass of isopropyl alcohol-1072.00 parts by mass of butyl acetate-268.00 parts by mass of methyl ethyl ketone ──────────────────

Polymer PA-1

<Formation of Positive A Plate A-1>
The following composition A-1 was applied on the alignment film P-1 using a bar coater.
Next, the coating film formed on the alignment film P-1 is heated to 180 ° C. with warm air, then cooled to 120 ° C., and heated to a wavelength of 365 nm using a high-pressure mercury lamp under a nitrogen atmosphere at 100 mJ / cm ² . By irradiating the coating film with ultraviolet rays, the orientation of the liquid crystal compound was fixed, and a positive A plate A-1 was produced.
Table 3 below shows Re (nm), Re (450) / Re (550), and thickness (d) of the produced positive A plate A-1.
Table 3 below shows the wavelength dispersion (Δn (450) / Δn (550)) of the reverse wavelength dispersive liquid crystal compound and the forward wavelength dispersive compound in the following composition A-1.

―――――――――――――――――――――――――――――――――
(Composition A-1)
―――――――――――――――――――――――――――――――――
-70.00 parts by mass of the following reverse wavelength dispersing liquid crystal compound L-2-30.00 parts by mass of the following forward wavelength dispersing compound 1-4-0.50 parts by mass of the following polymerization initiator PI-1-The following leveling agent T- 1 0.20 parts by mass, chloroform 570.00 parts by mass ―――――――――――――――――――――――――――――――――

Inverse wavelength dispersive liquid crystal compound L-2

Forward wavelength dispersing compound 1-4

Polymerization initiator PI-1

Leveling agent T-1

[Example 2]
A positive A plate A-2 was produced in the same manner as in Example 1, except that the composition A-1 was changed to the following composition A-2 and the thickness was adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-2. Further, Table 3 below shows the wavelength dispersion (Δn (450) / Δn (550)) of the reverse wavelength dispersive liquid crystal compound and the forward wavelength dispersive compound in the following composition A-2.

―――――――――――――――――――――――――――――――――
(Composition A-2)
―――――――――――――――――――――――――――――――――
-70.00 parts by mass of the following reverse-dispersion liquid crystal compound L-3-30.00 parts by mass of the following forward-dispersion compound 1-6-0.50 parts by mass of the polymerization initiator PI-1-0.50 parts by mass of the leveling agent T- 1 0.20 parts by mass ・ Chloroform 570.00 parts by mass

Inverse wavelength dispersive liquid crystal compound L-3

Forward wavelength dispersing compound 1-6

[Example 3]
A positive A plate A-3 was produced in the same manner as in Example 1, except that the composition A-1 was changed to the following composition A-3 and the thickness was adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-3. Table 3 below shows the wavelength dispersion (Δn (450) / Δn (550)) of the reverse wavelength dispersive liquid crystal compound and the forward wavelength dispersive compound in the following composition A-3.

―――――――――――――――――――――――――――――――――
(Composition A-3)
―――――――――――――――――――――――――――――――――
・ 70.00 parts by mass of the following reverse wavelength dispersing liquid crystal compound L-4 ・ 30.00 parts by mass of the following forward wavelength dispersing compound 1-7 ・ 0.50 parts by mass of the above-mentioned polymerization initiator PI-1 ・ the above-mentioned leveling agent T- 1 0.20 parts by mass, chloroform 570.00 parts by mass ―――――――――――――――――――――――――――――――――

Inverse wavelength dispersive liquid crystal compound L-4

Forward wavelength dispersing compound 1-7

[Example 4]
A positive A plate A-4 was produced in the same manner as in Example 1, except that the composition A-1 was changed to the following composition A-4 and the thickness was adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-4. In addition, Table 3 below shows the wavelength dispersion (Δn (450) / Δn (550)) of the reverse wavelength dispersive liquid crystal compound and the forward wavelength dispersive compound in the following composition A-4.

―――――――――――――――――――――――――――――――――
(Composition A-4)
―――――――――――――――――――――――――――――――――
・ 70.00 parts by mass of the following reverse wavelength dispersing liquid crystal compound L-5 ・ 30.00 parts by mass of the above forward wavelength dispersing compound 1-7 ・ 0.50 parts by mass of the above-mentioned polymerization initiator PI-1 ・ The above leveling agent T- 1 0.20 parts by mass ・ Chloroform 570.00 parts by mass ―――――――――――――――――――――――――――――――――

Inverse wavelength dispersive liquid crystal compound L-5

[Example 5]
A positive A plate A-5 was produced in the same manner as in Example 1, except that the composition A-1 was changed to the following composition A-5 and the thickness was adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-5. Table 3 below shows the wavelength dispersion (Δn (450) / Δn (550)) of the reverse wavelength dispersive liquid crystal compound and the forward wavelength dispersive compound in the following composition A-5.

―――――――――――――――――――――――――――――――――
(Composition A-5)
―――――――――――――――――――――――――――――――――
-70.00 parts by mass of the following reverse wavelength dispersing liquid crystal compound 3-7-30.00 parts by mass of the above forward wavelength dispersing compound 1-4-0.50 parts by mass of the above-mentioned polymerization initiator PI-1-above-mentioned leveling agent T- 1 0.20 parts by mass ・ Chloroform 570.00 parts by mass

Inverse wavelength dispersive liquid crystal compound 3-7

[Example 6]
A positive A plate A-6 was produced in the same manner as in Example 1, except that the composition A-1 was changed to the following composition A-6 and the thickness was adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-6. Table 3 below shows the wavelength dispersion (Δn (450) / Δn (550)) of the reverse wavelength dispersive liquid crystal compound and the forward wavelength dispersive compound in the following composition A-6.

―――――――――――――――――――――――――――――――――
(Composition A-6)
―――――――――――――――――――――――――――――――――
-70.00 parts by mass of the above reverse wavelength dispersing liquid crystal compound L-3-30.00 parts by mass of the following forward wavelength dispersing compound 4-2-0.50 parts by mass of the above-mentioned polymerization initiator PI-1-above-mentioned leveling agent T- 1 0.20 parts by mass, chloroform 570.00 parts by mass ―――――――――――――――――――――――――――――――――

Forward wavelength dispersing compound 4-2

[Comparative Example 1]
A positive A plate A-7 was produced in the same manner as in Example 1, except that the wavelength-dispersing compound 1-4 was excluded from the composition A-1, and the thickness and the heating temperature were adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-7.

[Comparative Example 2]
A positive A plate A-8 was prepared in the same manner as in Example 1, except that the wavelength-dispersing compound 1-6 was removed from the composition A-2 and the thickness and the heating temperature were adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-8.

[Comparative Example 3]
A positive A plate A-9 was produced in the same manner as in Example 1, except that the wavelength-dispersing compound 1-7 was removed from the composition A-3 and the thickness and the heating temperature were adjusted.
Table 3 below shows Re (nm), Re (450) / Re (550), and thickness (d) of Positive A Plate A-9.

[Comparative Example 4]
A positive A plate A-10 was prepared in the same manner as in Example 1, except that the wavelength-dispersing compound 1-7 was removed from the composition A-4, and the thickness and the heating temperature were adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-10.

[Comparative Example 5]
A positive A plate A-11 was produced in the same manner as in Example 1, except that the wavelength-dispersing compound 1-4 was excluded from the composition A-5 and the thickness and the heating temperature were adjusted.
Table 3 shows Re (nm), Re (450) / Re (550), and thickness (d) of the positive A plate A-11.

[Evaluation]
Table 3 below summarizes the evaluation results of the wet heat durability of the positive A plates manufactured in Examples 1 to 6 and Comparative Examples 1 to 5.

<Wet heat durability>
The pressure-sensitive adhesive was stuck on the prepared positive A plate, and Re (550) after being held in an environment of 85 ° C. and 85% for 500 hours was evaluated according to the following criteria.
A: When the ratio of Re (550) after holding is 85% or more with respect to Re (550) before holding at 85 ° C 85%, B: Re (550) before holding at 85 ° C 85% When the ratio of Re (550) after holding is 95% or more and less than 98% C: At 85 ° C. 85%, the ratio of Re (550) after holding is 90% or more and 95% or more with respect to Re (550) before holding. D: When the ratio of Re (550) after holding at 85 ° C. 85% to Re (550) before holding is less than 90%.

As shown in Table 3 above, by using a liquid crystal composition containing the reverse wavelength dispersing liquid crystal compound and the normal wavelength dispersing compound (I), the formed optically anisotropic film has good wet heat durability. (Examples 1 to 6). Specifically, from the results of the comparison between Examples 1 to 5 and Comparative Examples 1 to 5 (for example, the comparison between Example 1 and Comparative Example 1), the forward wavelength dispersing compound ( When the composition containing the compound (I) is used, the same reverse wavelength-dispersing liquid crystal compound is added, and when compared with a composition not containing the normal wavelength-dispersing compound (I), the wet heat resistance of the optically anisotropic film to be formed is higher. Was found to improve.

DESCRIPTION OF SYMBOLS 10 Optical film 12 Optically anisotropic film 14 Alignment film 16 Support 18 Hard coat layer

Claims

A liquid crystal composition comprising a liquid crystal compound having reverse wavelength dispersion and a compound having forward wavelength dispersion and represented by the following formula (I).
R 1 -C (＝ O) -Cy 1 -Cy 2 -C (＝ O) -R 2 (I)
Here, in the formula (I), Cy 1 and Cy 2 represent a 1,4-cyclohexylene group which may have a substituent, and R 1 and R 2 are each independently a hydrogen atom, Alternatively, it represents a substituent.
The liquid crystal composition according to claim 1, wherein the liquid crystal compound is a compound represented by the following formula (II).
L 1 -SP 1- (D 5 -A 1 -D 3 -G 1 -D 1 -Ar-D 2 ) m -G 2 -D 4 -A 2 -D 6 -SP 2 -L 2. II)
Here, in the above formula (II),
m represents an integer of 1 to 10. When m is an integer of 2 to 10, a plurality of symbols in the formula may be the same or different.
D 1 , D 2 , D 3 , D 4 , D 5 and D 6 each independently represent a single bond or —CO—, —O—, —S—, —C (＝ S) —, —CR 1 R 2 —, —CR 3 ＣＲCR 4 —, —NR 5 —, or a divalent linking group consisting of a combination of two or more thereof, wherein R 1 to R 5 are each independently a hydrogen atom , A fluorine atom, or an alkyl group having 1 to 4 carbon atoms.
G 1 and G 2 each independently represent a divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms which may have a substituent, and —CH constituting the alicyclic hydrocarbon group 2 - of one or more -O -, - S- or -NH- with optionally substituted.
A 1 and A 2 each independently represent an aromatic ring having 6 or more carbon atoms which may have a substituent, or a cycloalkane ring having 6 or more carbon atoms which may have a substituent.
SP 1 and SP 2 each independently constitute a single bond, a linear or branched alkylene group having 1 to 12 carbon atoms, or a linear or branched alkylene group having 1 to 12 carbon atoms. One or more of —CH 2 — represent a divalent linking group substituted with —O—, —S—, —NH—, —N (Q) —, or —CO—, and Q represents a substituent Represents
L 1 and L 2 each independently represent a monovalent organic group, and at least one of L 1 and L 2 represents a polymerizable group. However, when Ar is an aromatic ring represented by the following formula (Ar-3), at least one of L 1 and L 2 and L 3 and L 4 in the following formula (Ar-3) is a polymerizable group. Represents
Ar represents any aromatic ring selected from the group consisting of groups represented by the following formulas (Ar-1) to (Ar-5).

Here, in the above formulas (Ar-1) to (Ar-5),
* Represents the bonding position to D 1 or D 2.
Q 1 represents N or CH.
Q 2 represents —S—, —O—, or —N (R 6 ) —, and R 6 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
Y 1 represents an optionally substituted aromatic hydrocarbon group having 6 to 12 carbon atoms or an aromatic heterocyclic group having 3 to 12 carbon atoms.
Z 1 , Z 2 and Z 3 each independently represent a hydrogen atom, a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms, a monovalent alicyclic hydrocarbon group having 3 to 20 carbon atoms, A monovalent aromatic hydrocarbon group of 6 to 20, a halogen atom, a cyano group, a nitro group, —OR 7 , —NR 8 R 9 , or —SR 10 , wherein R 7 to R 10 are each independently , A hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and Z 1 and Z 2 may combine with each other to form an aromatic ring.
A 3 and A 4 each independently represent a group selected from the group consisting of —O—, —N (R 11 ) —, —S—, and —CO—, and R 11 is a hydrogen atom or Represents a substituent.
X represents a hydrogen atom or a non-metallic atom of Groups 14 to 16 to which a substituent may be bonded.
D 7 and D 8 are each independently a single bond or —CO—, —O—, —S—, —C (＝ S) —, —CR 1 R 2 —, —CR 3 ＣＲCR 4 — , —NR 5 —, or a divalent linking group consisting of a combination of two or more thereof, wherein R 1 to R 5 each independently represent a hydrogen atom, a fluorine atom, or a C 1 to C 4 Represents an alkyl group.
SP 3 and SP 4 each independently represent a single bond, a linear or branched alkylene group having 1 to 12 carbon atoms, or a linear or branched alkylene group having 1 to 12 carbon atoms. One or more of —CH 2 — represent a divalent linking group substituted with —O—, —S—, —NH—, —N (Q) —, or —CO—, and Q represents a substituent Represents
L 3 and L 4 each independently represent a monovalent organic group, and at least one of L 3 and L 4 and L 1 and L 2 in the formula (II) represent a polymerizable group.
Ax represents an organic group having 2 to 30 carbon atoms and having at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocyclic ring.
Ay has a hydrogen atom, an alkyl group having 1 to 12 carbon atoms which may have a substituent, or at least one aromatic ring selected from the group consisting of an aromatic hydrocarbon ring and an aromatic heterocyclic ring. And an organic group having 2 to 30 carbon atoms.
The aromatic ring in Ax and Ay may have a substituent, and Ax and Ay may combine to form a ring.
Q 3 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms which may have a substituent.
3. The liquid crystal composition according to claim 1, wherein the compound represented by the formula (I) is a compound represented by any of the following formulas (I-1) to (I-3).
L 11 -SP 11 -D 11 -C (= O) -Cy 1 -Cy 2 -C (= O) -D 12 -SP 12 -L 12 (I-1)
L 11 -SP 11 - (D 13 -A 11) p -D 11 -C (= O) -Cy 1 -Cy 2 -C (= O) -D 12 - (A 12 -D 14) q -SP 12 -L 12 ··· (I-2)
L 11 -SP 11 -D 11 - [C (= O) -Cy 1 -Cy 2 -C (= O) -D 15 - (A 13 -D 16) r ] n -C (= O) -Cy 1 -Cy 2 -C (= O) -D 12 -SP 12 -L 12 (I-3)
Here, in the above formulas (I-1) to (I-3),
p represents an integer of 1 to 3, q represents an integer of 1 to 3, r represents an integer of 1 to 3, and n represents an integer of 1 to 10. When p is 2 or 3, when q is 2 or 3, when r is 2 or 3, or when n is an integer of 2 to 10, there are plural occurrences in the formula. Each symbol may be the same or different.
Cy 1 and Cy 2 represent a 1,4-cyclohexylene group which may have a substituent.
D 11 , D 12 , D 13 , D 14 , D 15 and D 16 are each independently a single bond or -CO-, -O-, -S-, -C (= S)-, -CR 1 R 2 —, —CR 3 ＣＲCR 4 —, —NR 5 —, or a divalent linking group composed of a combination of two or more thereof, wherein R 1 to R 5 are each independently a hydrogen atom , A fluorine atom, or an alkyl group having 1 to 4 carbon atoms.
SP 11 and SP 12 each independently form a single bond, a linear or branched alkylene group having 1 to 12 carbon atoms, or a linear or branched alkylene group having 1 to 12 carbon atoms. One or more of —CH 2 — represent a divalent linking group substituted with —O—, —S—, —NH—, —N (Q) —, or —CO—; Represents
L 11 and L 12 each independently represent a hydrogen atom or a polymerizable group.
A 11 , A 12 and A 13 each independently represent an aromatic ring having 6 or more carbon atoms which may have a substituent or a divalent having 5 to 8 carbon atoms which may have a substituent Wherein at least one of —CH 2 — constituting the alicyclic hydrocarbon group may be substituted with —O—, —S—, or —NH—.
(4) An optically anisotropic film obtained by polymerizing the liquid crystal composition according to any one of (1) to (3).
The optically anisotropic film according to claim 4, which satisfies the following formula (III).
0.50 <Re (450) / Re (550) <1.00 (III)
Here, in the formula (III), Re (450) represents in-plane retardation of the optically anisotropic film at a wavelength of 450 nm, and Re (550) represents in-plane retardation of the optically anisotropic film at a wavelength of 550 nm. Represents retardation.
An optical film having the optically anisotropic film according to claim 4 or 5.
偏光 A polarizing plate comprising the optical film according to claim 6 and a polarizer.
画像 An image display device comprising the optical film according to claim 6 or the polarizing plate according to claim 7.