Liquid crystal composition, light-absorbing anisotropic film, laminate, image display device, and polymer

Abstract

The present invention addresses the problem of providing a liquid crystal composition, a light-absorbing anisotropic film, a laminate, an image display device, and a polymer which are capable of forming a light-absorbing anisotropic film in which the occurrence of alignment defects is suppressed while suppressing depression during the formation of the light-absorbing anisotropic film. This liquid crystal composition contains a liquid crystal compound, a dichroic substance, and a polymer having a repeating unit (A) having a structure represented by formula (A). In formula (A), RA1 and RA2 each independently represent a hydrogen atom or an alkyl group, RA3 represents a hydrogen atom, a halogen atom, or a substituent group, X represents a substituent group including one or more structures represented by formula (a), in formula (a), a bonding position is represented, and Ra1, Ra2, and Ra3 each independently represent an alkyl group, an alkenyl group, an aryl group, or an alkylene aryl group which may have a substituent group. .

Description

Technical Field

[0001] This invention relates to a liquid crystal composition, a light-absorbing anisotropic film, a laminate, an image display device, and a polymer. Background Technology

[0002] From the perspective of eliminating image tinting and controlling viewing angle, optical films such as optical compensation films and phase difference films are used in various display devices.

[0003] For example, in Patent Document 1, as a composition for forming a phase retardation layer contained in a phase retardation film, it is described as "a cured product of a phase retardation layer forming composition comprising a liquid crystal compound, a surfactant and a solvent, wherein the surfactant is a polyether-modified silicone having repeating units represented by the following general formula (I)" (claim 1 of Patent Document 1).

[0004] Previous technical documents Patent documents Patent Document 1: Japanese Patent Application Publication No. 2016-095421 Summary of the Invention

[0005] The technical problem to be solved by the invention As optical films used in display devices, light-absorbing anisotropic films containing liquid crystal compounds and dichroic substances are known.

[0006] The inventors have studied a liquid crystal composition comprising polyether-modified silicone, a liquid crystal compound, and a dichroic substance as described in Patent Document 1. As a result, it was found that a depression is generated when a light-absorbing anisotropic film is formed, and an orientation defect is generated in the formed light-absorbing anisotropic film.

[0007] Therefore, the objective of this invention is to provide a liquid crystal composition, a light-absorbing anisotropic film, a laminate, an image display device, and a polymer that suppresses depressions during the formation of a light-absorbing anisotropic film and suppresses the formation of orientation defects.

[0008] means for solving technical problems In order to solve the above-mentioned problems, the inventors conducted in-depth research and as a result, they discovered that by incorporating a specified polymer into the liquid crystal composition used in the formation of the light absorption anisotropic film, it is possible to suppress depressions when forming the light absorption anisotropic film and to form a light absorption anisotropic film in which the generation of orientation defects is suppressed, thereby completing the present invention.

[0009] That is, the inventors discovered that the above-mentioned problems can be solved by the following structure. [1] A liquid crystal composition comprising: a liquid crystal compound; a dichroic substance; and a polymer having a repeating unit A comprising a structure represented by the formula (A) described later.

[0011] In formula (A), R A1 and R A2 Each can be used to represent a hydrogen atom or an alkyl group independently.

[0012] R A3 It represents a hydrogen atom, a halogen atom, or a substituent.

[0013] X represents a substituent containing one or more structures represented by the following formula (a).

[0014] In formula (a), R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents. [2] According to the liquid crystal composition described in [1], wherein, The polymer described above also has a repeating unit B represented by the formula (B) described later.

[0016] In formula (B), R B1 R B2 and R B3 Each can be independently represented by a hydrogen atom, halogen atom, cyano group, alkyl group, alkenyl group, or aryl group.

[0017] R B4 and R B5 Each can be used independently to represent a hydrogen atom or a substituent. In R B4 and R B5 In the case of substituents, R B4 and R B5 They can be connected to form a ring. [3] According to the liquid crystal composition described in [2], wherein, In equation (B) above, R B4 and R B5 The total molecular weight is below 100. [4] According to the liquid crystal composition described in [2] or [3], wherein, In the above formula (B), R B4 and R B5 Organic groups consisting of 1 to 15 hydrogen or carbon atoms, respectively. [5] The liquid crystal composition according to any one of [1] to [4], wherein, The polymer described above also has a repeating unit D represented by the formula (D) described later.

[0021] In equation (D), R D1 R D2 and R D3 Each can be independently represented by a hydrogen atom, halogen atom, cyano group, alkyl group, alkenyl group, or aryl group.

[0022] L D1 This indicates a single bond, -COO-, or -CO-.

[0023] Sp D1 It represents a divalent hydrocarbon group with 1 to 20 carbon atoms. Among the -CH2- that constitutes part of the above hydrocarbon group, one or more non-adjacent -CH2- can be independently replaced by -O-, -S-, -NH- or -N(Q)-, where Q represents a substituent.

[0024] L D2 and L D3 Each can be used independently to represent a single bond or a divalent linker.

[0025] Cy D This indicates a divalent linker containing a mesocrystalline group.

[0026] D represents a hydrogen-bonded group consisting of a hydrogen atom and nonmetallic atoms from groups 14 to 16. These nonmetallic atoms may have substituents.

[0027] n represents an integer from 1 to 3. When n is 2 or 3, multiple L D2 They can be the same or different, multiple Cy D They can be the same or different. [6] According to the liquid crystal composition described in [5], wherein, In the above formula (D), L D3 This indicates a single bond; D represents -COOH or -NHCOR. 2 or -CONHR 3 .

[0029] Here, R 2 and R 3 Each of the above-mentioned alkyl or alkenyl groups, having 1 to 10 carbon atoms, can be independently represented. In particular, one or more non-adjacent -CH2- groups constituting part of the above-mentioned alkyl or alkenyl groups may be replaced by -O-. [7] According to the liquid crystal composition described in [5] or [6], wherein, In the above formula (D), L D3 Indicates a single bond, D represents -NHCOR 4 .

[0031] Here, R 4 It refers to an alkyl or alkenyl group having 1 to 3 carbon atoms. Among the -CH2- groups constituting part of the alkyl or alkenyl group, one or more non-adjacent -CH2- groups can be replaced by -O- groups. [8] The liquid crystal composition according to any one of [5] to [7], wherein, In the above formula (D), n is 1 or 2. [9] The liquid crystal composition according to any one of [1] to [8], wherein, The repeating unit A mentioned above is the repeating unit A-1 represented by the following formula (A-1).

[0034] In formula (A-1), R A1 and R A2 Each can be used to represent a hydrogen atom or an alkyl group independently.

[0035] R A3 It represents a hydrogen atom, a halogen atom, or a substituent.

[0036] L A1 Indicates a single bond, -O-, or -NR Z -. Among them, R Z It represents a hydrogen atom or a substituent.

[0037] L A2 This indicates a single bond or an m+1 valence linkage group.

[0038] m represents an integer greater than or equal to 1.

[0039] R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents.

[0040] When m is an integer greater than 2, multiple R a1 They can be the same or different, multiple R a2 They can be the same or different, multiple R a3 They can be the same or different.

[10] According to the liquid crystal composition described in [9], wherein, In the above formula (A-1), m is an integer greater than or equal to 2.

[11] The liquid crystal composition according to any one of [1] to

[10] , wherein, The polymer described above has repeating unit A-1 represented by the formula (A-1) described later, repeating unit B represented by the formula (B) described later, and repeating unit D represented by the formula (D) described later.

[0043] In formula (A-1), R A1 and R A2 Each can be used to represent a hydrogen atom or an alkyl group independently.

[0044] R A3 It represents a hydrogen atom, a halogen atom, or a substituent.

[0045] L A1 Indicates a single bond, -O-, or -NR Z -. Among them, R Z It represents a hydrogen atom or a substituent.

[0046] L A2 This indicates a single bond or an m+1 valence linkage group.

[0047] m represents an integer greater than or equal to 1.

[0048] R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents.

[0049] When m is an integer greater than 2, multiple R a1 They can be the same or different, multiple R a2 They can be the same or different, multiple R a3 They can be the same or different.

[0050] In formula (B), R B1 R B2 and R B3 Each can be independently represented by a hydrogen atom, halogen atom, cyano group, alkyl group, alkenyl group, or aryl group.

[0051] R B4 and R B5 Each can be used independently to represent a hydrogen atom or a substituent. In R B4 and R B5 In the case of substituents, R B4 and R B5 They can be connected to form a ring.

[0052] In equation (D), R D1 R D2 and R D3Each can be independently represented by a hydrogen atom, halogen atom, cyano group, alkyl group, alkenyl group, or aryl group.

[0053] L D1 This indicates a single bond, -COO-, or -CO-.

[0054] Sp D1 It represents a divalent hydrocarbon group with 1 to 20 carbon atoms. Among the -CH2- that constitutes part of the above hydrocarbon group, one or more non-adjacent -CH2- can be independently replaced by -O-, -S-, -NH- or -N(Q)-, where Q represents a substituent.

[0055] L D2 and L D3 Each can be used independently to represent a single bond or a divalent linker.

[0056] Cy D This indicates a divalent linker containing a mesocrystalline group.

[0057] D represents a hydrogen-bonded group consisting of a hydrogen atom and nonmetallic atoms from groups 14 to 16. These nonmetallic atoms may have substituents.

[0058] n represents an integer from 1 to 3. When n is 2 or 3, multiple L D2 They can be the same or different, multiple Cy D They can be the same or different.

[12] The liquid crystal composition according to any one of [1] to

[11] , wherein, The mass ratio of the above polymer content to the above dichroic substance content is 0.0007 to 0.6.

[13] The liquid crystal composition according to any one of [1] to

[12] , wherein, The aforementioned liquid crystal compounds include polymeric liquid crystal compounds.

[14] According to the liquid crystal composition described in

[13] , wherein, The aforementioned liquid crystal compounds also include low molecular weight liquid crystal compounds.

[15] An anisotropic light-absorbing film obtained using any one of the liquid crystal compositions described in [1] to

[14] .

[16] According to the light absorption anisotropic film described in

[15] , wherein, The orientation states of the liquid crystal compounds and dichroic substances contained in the aforementioned anisotropic light-absorbing film are fixed. The angle θ between the transmittance central axis of the aforementioned anisotropic light-absorbing film and the normal direction of the surface of the aforementioned anisotropic light-absorbing film exceeds 45° and is less than 90°.

[17] A laminate having the light-absorbing anisotropic film and λ / 4 plate as described in

[15] or

[16] .

[18] An image display device having the light-absorbing anisotropic film and display element described in

[15] or

[16] .

[19] A polymer having: The repeating unit A-1, as represented by the following formula (A-1); and At least one of the repeating unit B represented by the following formula (B) and the repeating unit D represented by the following formula (D).

[0067] In formula (A-1), R A1 and R A2 Each can be used to represent a hydrogen atom or an alkyl group independently.

[0068] R A3 It represents a hydrogen atom, a halogen atom, or a substituent.

[0069] L A1 Indicates a single bond, -O-, or -NR Z -. Among them, R Z It represents a hydrogen atom or a substituent.

[0070] L A2 This indicates a single bond or an m+1 valence linkage group.

[0071] m represents an integer greater than or equal to 1.

[0072] R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents.

[0073] When m is an integer greater than 2, multiple R a1 They can be the same or different, multiple R a2 They can be the same or different, multiple R a3 They can be the same or different.

[0074] In formula (B), R B1 R B2 and R B3 Each can be independently represented by a hydrogen atom, halogen atom, cyano group, alkyl group, alkenyl group, or aryl group.

[0075] R B4 and R B5 Each can be used independently to represent a hydrogen atom or a substituent. In R B4 and R B5 In the case of substituents, R B4 and R B5 They can be connected to form a ring.

[0076] In equation (D), R D1 R D2 and R D3 Each can be independently represented by a hydrogen atom, halogen atom, cyano group, alkyl group, alkenyl group, or aryl group.

[0077] L D1 This indicates a single bond, -COO-, or -CO-.

[0078] Sp D1 It represents a divalent hydrocarbon group with 1 to 20 carbon atoms. Among the -CH2- that constitutes part of the above hydrocarbon group, one or more non-adjacent -CH2- can be independently replaced by -O-, -S-, -NH- or -N(Q)-, where Q represents a substituent.

[0079] L D2 and L D3 Each can be used independently to represent a single bond or a divalent linker.

[0080] Cy D This indicates a divalent linker containing a mesocrystalline group.

[0081] D represents a hydrogen-bonded group consisting of a hydrogen atom and nonmetallic atoms from groups 14 to 16. These nonmetallic atoms may have substituents.

[0082] n represents an integer from 1 to 3. When n is 2 or 3, multiple L D2 They can be the same or different, multiple Cy D They can be the same or different.

[0083] Invention Effects According to the present invention, a liquid crystal composition, a light-absorbing anisotropic film, a laminate, an image display device, and a polymer are provided that suppress depressions during the formation of a light-absorbing anisotropic film and suppress the generation of orientation defects. Attached Figure Description

[0084] Figure 1 This is a side view schematically showing one embodiment of a virtual reality display device, which is an example of the display device of the present invention. Detailed Implementation

[0085] The present invention will now be described in detail.

[0086] The following description of the constituent elements is based on a representative embodiment of the present invention, but the present invention is not limited to this embodiment.

[0087] Furthermore, in this specification, the numerical range indicated by "~" represents the range encompassed by the values ​​recorded before and after "~" as lower and upper limits. Within the numerical ranges described in stages in this specification, the upper or lower limit value recorded within a certain numerical range can be replaced with the upper or lower limit value of other numerical ranges described in stages. Moreover, within the numerical ranges described in this specification, the upper or lower limit value recorded within a certain numerical range can be replaced with the values ​​shown in the embodiments.

[0088] Furthermore, in this specification, each component may be used alone with one corresponding substance, or with two or more substances used in combination. Here, regarding each component, when two or more substances are used in combination, unless otherwise specified, the content of that component refers to the total content of the substances used in combination.

[0089] Furthermore, in this specification, "(meth)acrylate" is the expression for "acrylate" or "methacrylate", "(meth)acrylic" is the expression for "acrylic" or "methacrylic"", "(meth)acryloyl" is the expression for "acryloyl" or "methacryloyl", and "(meth)acrylic" is the expression for "acrylic" or "methacrylic".

[0090] Furthermore, unless otherwise specified, the bonding direction of the divalent groups described in this specification is not limited. For example, in a compound represented by the formula "XYZ", where Y is -C(O)-O-, Y can be either -C(O)-O- or -OC(O)-. Moreover, the aforementioned compound can be either "XC(O)-OZ" or "XOC(O)-Z".

[0091] Furthermore, in this specification, "orthogonal" and "parallel" related to angles refer to a strict range of ±10°, and "same" and "different" related to angles can be judged based on whether their difference is less than 5°.

[0092] Furthermore, in this specification, "visible light" refers to 380–780 nm.

[0093] Furthermore, unless otherwise specified in this instruction manual, the measurement wavelength is 550 nm.

[0094] In this specification, "slow axis" refers to the direction of maximum in-plane refractive index. Additionally, when referred to as the slow axis of an optical anisotropy layer, it refers to the slow axis of the entire optical anisotropy layer.

[0095] In this specification, “Re(λ)” and “Rth(λ)” represent the in-plane delay and the thickness direction delay at wavelength λ, respectively.

[0096] Here, the values ​​of in-plane delay and thickness direction delay refer to the values ​​measured using AxoScan OPMF-1 (manufactured by Opto Science, Inc.) and light of the measurement wavelength.

[0097] Specifically, the average refractive index ((nx+ny+nz) / 3) and film thickness (d(μm)) are input using AxoScan OPMF-1 to calculate... Slow axis direction (°) Re(λ) = R0(λ) Rth(λ)=((nx+ny) / 2-nz)×d.

[0098] Additionally, R0(λ) is displayed as a value calculated using AxoScan OPMF-1, but it represents Re(λ).

[0099] [Substituent W] In this specification, the substituent W represents the following groups.

[0100] Examples of substituents W include halogen atoms, alkyl groups with 1 to 20 carbon atoms, haloalkyl groups with 1 to 20 carbon atoms, cycloalkyl groups with 1 to 20 carbon atoms, alkylcarbonyl groups with 1 to 10 carbon atoms, alkoxycarbonyl groups with 1 to 10 carbon atoms, alkylcarbonyloxy groups with 1 to 10 carbon atoms, alkylamino groups with 1 to 10 carbon atoms, alkylaminocarbonyl groups, alkoxy groups with 1 to 20 carbon atoms, alkenyl groups with 1 to 20 carbon atoms, alkynyl groups with 1 to 20 carbon atoms, aryl groups with 1 to 20 carbon atoms, heterocyclic groups (also called heteroatom-containing cyclic groups), cyano groups, hydroxyl groups, nitro groups, carboxyl groups, aryloxy groups, siloxy groups, heterocyclic groups, acyloxy groups, carbamoyloxy groups, and alkoxycarbonyl groups. Oxygen, aryloxycarbonyloxy, amino (including aniline), ammonium, acylamino, aminocarbonylamino, alkoxycarbonylamino, aryloxycarbonylamino, aminosulfonylamino, alkyl or arylsulfonylamino, mercapto, alkylthio, arylthio, heterocyclic thio, aminosulfonyl, sulfonyl, alkyl or arylsulfinyl, alkyl or arylsulfonyl, acyl, aryloxycarbonyl, alkoxycarbonyl, carbamoyl, aryl or heterocyclic azo, imide, phosphinyl, oxophosphinyl, oxophosphinyloxy, oxophosphinylamino, phosphonyl, silyl, hydrazyl, urea, borate (-B(OH)2), phosphate (-OPO(OH)2), sulfate (-OSO3H), and other known substituents.

[0101] In addition, details regarding the substituents are described in paragraph

[0023] of Japanese Patent Application Publication No. 2007-234651.

[0102] Furthermore, the substituent W can also be a group represented by the following formula (W1).

[0103] [Chemical Formula 1] In formula (W1), LW represents a single bond or a divalent linking group, SPW represents a divalent spacer group, and Q represents a terminal group. Indicates the bonding location.

[0104] Examples of divalent linking groups represented by LW include -O-, -Si(CH3)2-, and -(Si(CH3)2O). g - (g represents an integer from 1 to 10.), -N(Z)-, -C(Z)=C(Z) 1 )-, -C(Z)=N-, -C(O)-, -C(O)O-, -OC(O)O-, -C(O)N(Z)-, -C(Z)=C(Z 1 )-C(O)O-, -C(Z)=N-, -C(Z)=C(Z 1 )-C(O)N(Z 2 -C(Z) = C(Z) 1)-C(O)-S-,-C(Z)=NN=C(Z 1 )-(Z, Z 1 and Z 2 Each group can independently represent hydrogen, alkyl, cycloalkyl, aryl, cyano, or halogen atoms with 1 to 4 carbon atoms, and can also represent -C≡C-, -N=N-, -S-, -S(O)-, -S(O)(O)-, -(O)S(O)O-, -O(O)S(O)O-, and -SC(O)-. LW can be a group formed by combining two or more of these groups (hereinafter abbreviated as "LC").

[0105] Examples of divalent spacer groups represented by SPW include straight-chain, branched, or cyclic alkylene groups or heterocyclic groups with 1 to 20 carbon atoms, which have 1 to 50 carbon atoms.

[0106] The carbon atoms of the aforementioned alkylene and heterocyclic groups can be replaced by -O-, -Si(CH3)2-, or -(Si(CH3)2O). g - (g represents an integer from 1 to 10.), -N(Z)-, -C(Z)=C(Z) 1 )-,-C(Z)=N-,-C(Z)2-C(Z 1 )2-, -C(O)-, -C(O)O-, -OC(O)O-, -C(O)N(Z)-, -C(Z)=C(Z 1 )-C(O)O-, -C(Z)=N-, -C(Z)=C(Z 1 )-C(O)N(Z 2 -C(Z) = C(Z) 1 )-C(O)-S-,-C(Z)=NN=C(Z 1 )-(Z, Z 1 Z 2 Independently representing hydrogen, alkyl, cycloalkyl, aryl, cyano or halogen atoms having 1 to 4 carbon atoms, -C≡C-, -N=N-, -S-, -C(S)-, -S(O)-, -SO2-, -(O)S(O)O-, -O(O)S(O)O-, -SC(O)- and groups formed by combining two or more of these groups.

[0107] The hydrogen atoms of the aforementioned alkylene groups and heterocyclic groups can be halogen atoms, cyano groups, or -Z groups. H1 -OH, -OZ H1 -COOH, -C(O)Z H1 -C(O)OZ H1 -OC(O)Z H1 -OC(O)OZ H1 -NZ H1 Z H2-NZ H1 C(O)Z H2 -NZ H1 C(O)OZ H2 -C(O)NZ H1 Z H2 -OC(O)NZ H1 Z H2 -NZ H1 C(O)NZ H2 OZ H3 -SH, -SZ H1 -C(S)Z H1 -C(O)SZ H1 -SC(O)Z H1 Replacement. Here, Z H1 Z H2 Z H3 Represents alkyl, haloalkyl, and -L-CL with 1 to 10 carbon atoms.

[0108] In -L-CL, L represents a single bond or a divalent linker. Specific examples of divalent linkers are the same as those for LW and SPW mentioned above.

[0109] In -L-CL, CL represents a crosslinking group. Specific examples of crosslinking groups can be given by crosslinking groups represented by the following formulas (P-1) to (P-30).

[0110] [Chemical Formula 2] In equations (P-1) to (P-30), R P This refers to hydrogen atoms, halogen atoms, straight-chain, branched, or cyclic alkylene groups with 1 to 10 carbon atoms, haloalkyl groups with 1 to 20 carbon atoms, alkoxy groups with 1 to 20 carbon atoms, alkenyl groups with 1 to 20 carbon atoms, alkynyl groups with 1 to 20 carbon atoms, aryl groups with 1 to 20 carbon atoms, heterocyclic groups (also called heteroatom-containing cyclic groups), cyano, hydroxyl, nitro, carboxyl, aryloxy, silyloxy, heterocyclic, acyloxy, carbamoyloxy, alkoxycarbonyloxy, aryloxycarbonyloxy, amino (including aniline), ammonium, amide, and aminocarbonylamine. alkyl, alkoxycarbonylamino, aryloxycarbonylamino, aminosulfonylamino, alkyl or arylsulfonylamino, mercapto, alkylthio, arylthio, heterocyclic thio, aminosulfonyl, sulfonyl, alkyl or arylsulfinyl, alkyl or arylsulfonyl, acyl, aryloxycarbonyl, alkoxycarbonyl, carbamoyl, aryl or heterocyclic azo, imide, phosphinyl, oxophosphinyl, oxophosphinyloxy, oxophosphinylamino, phosphonyl, silyl, hydrazyl, urea, borate (-B(OH)2), phosphate (-OPO(OH)2) or sulfate (-OSO3H), multiple R PThey can be the same or different.

[0111] Preferred crosslinking groups include free radical polymerizable groups and cationic polymerizable groups. For free radical polymerizable groups, preferred options include vinyl groups represented by formula (P-1), butadienyl groups represented by formula (P-2), (meth)acryloyl groups represented by formula (P-4), (meth)acrylamido groups represented by formula (P-5), vinyl acetate groups represented by formula (P-6), fumarate groups represented by formula (P-7), styrene groups represented by formula (P-8), vinylpyrrolidone groups represented by formula (P-9), maleic anhydride groups represented by formula (P-11), or maleimide groups represented by formula (P-12). For cationic polymerizable groups, preferred options include vinyl ether groups represented by formula (P-18), epoxy groups represented by formula (P-19), or oxobutyl groups represented by formula (P-20).

[0112] As the terminal group represented by Q, it can represent a hydrogen atom, a halogen atom, a straight-chain, branched, or cyclic alkyl group with 1 to 20 carbon atoms, an alkoxy group with 1 to 20 carbon atoms, an alkenyl group with 1 to 20 carbon atoms, an aryl group with 1 to 20 carbon atoms, a heterocyclic group (also called a heteroatom-containing cyclic group), a cyano group, a hydroxyl group, a nitro group, a carboxyl group, an aryloxy group, a silyloxy group, a heterocyclic oxygen group, an acyloxy group, a carbamoyloxy group, an alkoxycarbonyloxy group, an aryloxycarbonyloxy group, an amino group (including an aniline group), an ammonium group, an amide group, an aminocarbonylamino group, an alkoxycarbonylamino group, or an aryloxycarbonyl group. alkylamino, aminosulfonylamino, alkyl or arylsulfonylamino, mercaptoalkylthio, arylthio, heterocyclic thio, aminosulfonyl, sulfonyl, alkyl or arylsulfinyl, alkyl or arylsulfonyl, acyl, aryloxycarbonyl, alkoxycarbonyl, carbamoyl, aryl or heterocyclic azo, imide, phosphinyl, oxophosphinyl, oxophosphinyloxy, oxophosphinylamino, phosphonyl, silyl, hydrazine, urea, borate (-B(OH)2), phosphate (-OPO(OH)2), sulfate (-OSO3H), or crosslinking groups represented by the formulas (P1) to (P-30) above.

[0113] [Liquid Crystal Composition] The liquid crystal composition of the present invention comprises: a liquid crystal compound; a dichroic substance; and a polymer (hereinafter also referred to as "specific polymer") having a repeating unit A comprising a structure represented by the formula (A) described later.

[0114] According to the liquid crystal composition of the present invention, depressions are suppressed during the formation of anisotropic light absorption films, and anisotropic light absorption films in which the generation of orientation defects is suppressed can be formed. The details of the reason are not yet clear, but it can be roughly inferred as follows.

[0115] That is, a specific polymer having repeating unit A with branched Si structures on its side chains can reduce the surface tension of the liquid crystal composition and also exhibits good compatibility with the liquid crystal compound and the dichroic material. Therefore, it is believed that the depression during the formation of anisotropic light absorption films is suppressed. Furthermore, it is speculated that orientation defects are caused by components with the dichroic material precipitated during film formation as their core; however, since the specific polymer has good compatibility with the dichroic material, it is believed that an anisotropic light absorption film in which the generation of orientation defects is suppressed can be formed.

[0116] Furthermore, the liquid crystal composition according to the present invention can form a light absorption anisotropic film with excellent orientation. The details of the reason are not yet clear, but it is speculated that the orientation of the light absorption anisotropic film is improved due to the reduction of the surface tension of the liquid crystal composition caused by the use of a specific polymer and the good compatibility of the specific polymer with the liquid crystal compound and the dichroic substance.

[0117] The components contained in the liquid crystal composition of the present invention will be described in detail below.

[0118] [Liquid Crystal Compounds] The liquid crystal composition of the present invention contains a liquid crystal compound. This suppresses the precipitation of dichroic substances and allows the dichroic substances to be oriented with a higher degree of orientation.

[0119] As a liquid crystal compound, either a high-molecular-weight liquid crystal compound or a low-molecular-weight liquid crystal compound can be used. From the viewpoint of improving the degree of orientation, a high-molecular-weight liquid crystal compound is preferred. Furthermore, as a liquid crystal compound, both high-molecular-weight liquid crystal compounds and low-molecular-weight liquid crystal compounds can be used together.

[0120] Here, "polymer liquid crystal compound" refers to a liquid crystal compound that has repeating units in its chemical structure.

[0121] Furthermore, "low molecular weight liquid crystal compounds" refers to liquid crystal compounds that do not have repeating units in their chemical structure.

[0122] Examples of polymeric liquid crystal compounds include, for example, the thermotropic liquid crystal polymer described in Japanese Patent Application Publication No. 2011-237513, and the polymeric liquid crystal compounds described in paragraphs

[0012] to

[0042] of International Publication No. 2018 / 199096.

[0123] As a low-molecular-weight liquid crystal compound, examples include the liquid crystal compounds described in paragraphs

[0072] to

[0088] of Japanese Patent Application Publication No. 2013-228706, among which liquid crystal compounds exhibiting smectic properties are preferred.

[0124] Examples of such liquid crystal compounds include those described in paragraphs

[0019] to

[0140] of International Publication No. 2022 / 014340, which are incorporated herein by reference.

[0125] The weight-average molecular weight (Mw) of the polymeric liquid crystal compound is preferably 2,000 to 300,000, more preferably 2,000 to 100,000. If the Mw of the polymeric liquid crystal compound is within the above range, the polymeric liquid crystal compound is easier to process.

[0126] Here, the weight-average molecular weight (Mw) and number-average molecular weight (Mn) of the polymeric liquid crystal compounds are values ​​determined by gel permeation chromatography (GPC).

[0127] • Solvent (eluent): N-methylpyrrolidone • Device Name: TOSOH HLC-8220GPC • String: Used by connecting 3 TOSOH TSKgel Super HZM-H (4.6mm × 15cm) tubes. • Column temperature: 25℃ • Sample concentration: 0.1% by mass • Flow rate: 0.35 ml / min • Calibration curve: The calibration curve was obtained using seven samples of TSK standard polystyrene prepared by TOSOH CORPORATION, with values ​​ranging from Mw=2,800,000 to 1,050 (Mw / Mn=1.03 to 1.06). The content of the liquid crystal compound is preferably 25 to 2000 parts by mass relative to 100 parts by mass of the dichroic material described later, more preferably 100 to 1300 parts by mass, and even more preferably 200 to 900 parts by mass. By keeping the content of the liquid crystal compound within the above range, the orientation degree of the dichroic material is further improved.

[0128] The liquid crystal compound may contain one type or two or more types. When two or more liquid crystal compounds are contained, the content of the liquid crystal compound mentioned above represents the total content of the liquid crystal compounds.

[0129] [Dichroic substances] The liquid crystal composition of the present invention contains a dichroic substance.

[0130] Here, dichroism refers to pigments whose absorbance varies depending on the direction.

[0131] Furthermore, dichroic materials may or may not exhibit liquid crystal properties.

[0132] There are no particular limitations on dichroic substances. Examples include visible light absorbing substances (dichroic pigments), luminescent substances (fluorescent substances, phosphorescent substances), ultraviolet light absorbing substances, infrared light absorbing substances, nonlinear optical substances, carbon nanotubes, and inorganic substances (such as quantum rods). Previously known dichroic substances (dichroic pigments) can be used.

[0133] Specifically, examples include paragraphs

[0067] to

[0071] of Japanese Patent Application Publication No. 2013-228706, paragraphs

[0008] to

[0026] of Japanese Patent Application Publication No. 2013-227532, paragraphs

[0008] to

[0015] of Japanese Patent Application Publication No. 2013-209367, paragraphs

[0045] to

[0058] of Japanese Patent Application Publication No. 2013-14883, paragraphs

[0012] to

[0029] of Japanese Patent Application Publication No. 2013-101328, paragraphs

[0009] to

[0017] of Japanese Patent Application Publication No. 2013-37353, and paragraphs

[0051] to

[0065] of Japanese Patent Application Publication No. 2013-37353. Japanese Patent Application Publication No. 2012-63387, paragraphs

[0049] to

[0073] ; Japanese Patent Application Publication No. Hei 11-305036, paragraphs

[0016] to

[0018] ; Japanese Patent Application Publication No. 2001-133630, paragraphs

[0009] to

[0011] ; Japanese Patent Application Publication No. 2011-215337, paragraphs

[0030] to

[0169] ; Japanese Patent Application Publication No. 2010-106242, paragraphs

[0021] to

[0075] ; Japanese Patent Application Publication No. 2010-215846, paragraphs

[0011] to

[0025] ; Japanese Patent Application Publication No. 2011-048311, paragraphs

[0017] to

[0069] ; Japanese Patent Application Publication No. 2011-2 Paragraphs

[0013] to

[0133] of Japanese Patent Application Publication No. 13610, paragraphs

[0074] to

[0246] of Japanese Patent Application Publication No. 2011-237513, paragraphs

[0005] to

[0051] of Japanese Patent Application Publication No. 2016-006502, paragraphs

[0014] to

[0032] of Japanese Patent Application Publication No. 2018-053167, paragraphs

[0014] to

[0033] of Japanese Patent Application Publication No. 2020-11716, paragraphs

[0005] to

[0041] of International Publication No. 2016 / 060173, paragraphs

[0008] to

[0062] of International Publication No. 2016 / 136561, and International Publication No. 2017 / 154835. Paragraphs

[0014] to

[0033] , paragraphs

[0014] to

[0033] of International Publication No. 2017 / 154695, paragraphs

[0013] to

[0037] of International Publication No. 2017 / 195833, paragraphs

[0014] to

[0034] of International Publication No. 2018 / 164252, paragraphs

[0021] to

[0030] of International Publication No. 2018 / 186503, paragraphs

[0043] to

[0063] of International Publication No. 2019 / 189345, paragraphs

[0043] to

[0085] of International Publication No. 2019 / 225468, and paragraphs

[0050] to

[0074] of International Publication No. 2020 / 004106.The dichroic substance described in paragraphs

[0015] to

[0038] of International Publication No. 2021 / 044843.

[0134] As a dichroic substance, a dichroic azo dye compound is preferred.

[0135] Dichroic azo dye compounds are azo dye compounds whose absorbance varies depending on the direction. Dichroic azo dye compounds may or may not exhibit liquid crystal properties. When dichroic azo dye compounds exhibit liquid crystal properties, they can exhibit either nematic or smectic properties. The preferred temperature range for developing the liquid crystal phase is room temperature (approximately 20–28°C) to 300°C, and more preferably 50–200°C from the viewpoint of operability and manufacturing suitability.

[0136] In this invention, from the viewpoint of adjusting the hue, it is preferable to use at least one pigment compound (first dichroic azo pigment compound) having a maximum absorption wavelength in the wavelength range of 560 to 700 nm and at least one pigment compound (second dichroic azo pigment compound) having a maximum absorption wavelength in the wavelength range of 455 nm or more and less than 560 nm.

[0137] In this invention, three or more dichroic azo pigment compounds may be used together. For example, from the viewpoint of making the light absorption anisotropic film close to black, it is preferable to use a first dichroic azo pigment compound, a second dichroic azo pigment compound, and at least one pigment compound (a third dichroic azo pigment compound) that has a maximum absorption wavelength in the range of 380 nm or more and less than 455 nm.

[0138] In this invention, from the viewpoint of excellent light resistance of the light-absorbing anisotropic film, it is preferable to include two or more first dichroic azo dye compounds.

[0139] In this invention, it is preferred that the dichroic azo dye compound has crosslinking groups.

[0140] Examples of crosslinking groups include (meth)acryloyl, epoxy, oxetyl and styryl, with (meth)acryloyl being preferred.

[0141] From the viewpoint that the orientation degree of the formed light absorption anisotropic film becomes higher, the content of the dichroic substance relative to the total solid content of the liquid crystal composition is preferably 3 to 90% by mass, more preferably 5 to 70% by mass, and even more preferably 10 to 60% by mass. In addition, when multiple dichroic substances are used together, it is preferable that the total amount of the multiple dichroic substances is within the above range.

[0142] In this specification, "total solids content in the liquid crystal composition" refers to components other than solvents. Specific examples of solids content include liquid crystal compounds, dichroic substances, and certain polymers.

[0143] [Specific polymers] The specific polymer is a polymer having repeating unit A, especially in the case of horizontal orientation (the angle θ formed by the central axis of the transmittance of the light absorption anisotropic film and the normal direction of the surface of the light absorption anisotropic film is greater than 45° and less than 90°). From the viewpoint of better effect of the present invention and better orientation of the light absorption anisotropic film, it is preferable to be a polymer (copolymer) containing repeating unit A (preferably repeating unit A-1) and at least one of repeating unit B and repeating unit D, and more preferably a polymer (copolymer) containing repeating unit A (preferably repeating unit A-1), repeating unit B and repeating unit D.

[0144] <Repeating Unit A> The repeating unit A is a repeating unit containing a structure represented by the following formula (A).

[0145] [Chemical Formula 3] In formula (A), R A1 and R A2 Each can be used to represent a hydrogen atom or an alkyl group independently.

[0146] As R A1 and R A2 The alkyl group in the formula can be, for example, a straight-chain alkyl group with 1 to 18 carbon atoms (preferably 1 to 6 carbon atoms, more preferably 1 to 4 carbon atoms), or a branched or cyclic alkyl group with 3 to 18 carbon atoms (preferably 3 to 9 carbon atoms, more preferably 3 to 6 carbon atoms). Specifically, examples include methyl, ethyl, propyl, butyl, isopropyl, tert-butyl, cyclohexyl, etc.

[0147] R A1 and R A2 All are preferably hydrogen atoms.

[0148] In formula (A), R A3 It represents a hydrogen atom, a halogen atom, or a substituent.

[0149] As R A3 Substituents in the form of alkyl, alkenyl, aryl, or substituents having a linking group and having the structure of the following formula (a) at the end are examples of substituents.

[0150] As a specific example of a substituent having a linking group and a structure of the following formula (a) at the end, -CH2-CO-L can be cited. A1 -LA2 -(Si(R) a1 (R) a2 (R) a3 )) m Additionally, -L A1 -L A2 -(Si(R) a1 (R) a2 (R) a3 )) m The definition and -L in the following formula (A-1) A1 -L A2 -(Si(R) a1 (R) a2 (R) a3 )) m The definitions are the same, and the preferred methods are also the same.

[0151] R 23 The substituents are preferably alkyl groups, more preferably straight-chain alkyl groups with 1 to 4 carbon atoms, and even more preferably methyl or ethyl groups.

[0152] R 23 Preferably, it contains hydrogen atoms or methyl groups.

[0153] In formula (A), X represents a substituent (hereinafter also referred to as "substituent X") comprising one or more structures represented by formula (a) below (hereinafter also referred to as "group a").

[0154] As substituent X, it is preferably a monovalent hydrocarbon group having one or more groups a. The monovalent hydrocarbon group in substituent X can be any of straight-chain, branched, or cyclic, preferably straight-chain or branched.

[0155] Examples of monovalent hydrocarbon groups in substituent X include monovalent aliphatic hydrocarbon groups and monovalent aromatic hydrocarbon groups. The monovalent hydrocarbon group is preferably a monovalent aliphatic hydrocarbon group, and more preferably an alkyl group. The alkyl group can be straight-chain, branched, or cyclic, but is preferably straight-chain or branched. The alkyl group preferably has 1 to 30 carbon atoms, more preferably 2 to 25, and even more preferably 2 to 20.

[0156] Here, in the -CH2- that constitutes part of the monovalent hydrocarbon group in substituent X, one or more -CH2- groups can be independently replaced by -O-, -CO-, -C(O)-O-, or -C(O)-N(R) X10 )-、-[O-Si(R X11 )2] nx -、-Si(R X12 The 2- and other divalent groups are substituted, preferably substituted by these divalent groups.

[0157] R X10The alkyl group represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, preferably a hydrogen atom. The alkyl group can be straight-chain, branched, or cyclic, but is preferably straight-chain or branched.

[0158] R X11 and R X12 Each of the following elements independently represents a hydrogen atom, a hydroxyl group, group a (i.e., a group represented by formula (a) below), and an alkyl group having 1 to 6 carbon atoms, preferably an alkyl group having 1 to 6 carbon atoms or the aforementioned group a. The alkyl group can be straight-chain, branched, or cyclic, but is preferably straight-chain or branched. (2 Rs) X11 They can be the same or different. Two R's. X12 They can be the same or different.

[0159] nx is a number greater than or equal to 1, preferably a number between 1 and 100, and more preferably a number between 1 and 11. When nx is a number greater than or equal to 2, multiple [O-Si(R)] X11 )2] can be the same or different.

[0160] As one of the preferred methods for substituent X, a group represented by the following formula (X1) can be cited.

[0161] Equation (X1) In equation (X1), Indicates the bonding location.

[0162] In equation (X1), L X10 and L X11 Each of these groups independently represents a divalent hydrocarbon group. Within the -CH2- group that constitutes part of the divalent hydrocarbon group, one or more -CH2- groups can be independently converted by -O-, -CO-, -C(O)-O-, or -C(O)-N(R). X10 )-、-[O-Si(R X11 )2] nx -、-Si(R X12 )2- and other divalent groups are substituted. Additionally, R X10 R X11 R X12 The definitions of and nx are as described above. 2 R X11 They can be the same or different. Two R's. X12 They can be the same or different. When nx is a number greater than 2, multiple [O-Si(R)] can be used. X11 )2] can be the same or different.

[0163] As L X10 and L X11The divalent hydrocarbon group in the alkyl group can be categorized as aliphatic or aromatic. The divalent hydrocarbon group is preferably aliphatic, and more preferably alkylene. The alkylene group can be straight-chain, branched, or cyclic, but is preferably straight-chain or branched, and more preferably straight-chain. The alkylene group preferably has 1 to 30 carbon atoms, more preferably 2 to 25, and even more preferably 2 to 20.

[0164] In equation (X1), R X20 Represents a hydrogen atom or a monovalent hydrocarbon group. R X20 The definition of the monovalent hydrocarbon group in this context is the same as that of the monovalent hydrocarbon group described in the above substituent X.

[0165] In formula (X1), a represents the structure (group) represented by the formula (a) described later.

[0166] In equation (X1), mx represents an integer from 0 to 2. When mx is an integer of 0 or 1, multiple (L X11 -a) They can be the same or different. When mx is 2, there are 2 R... X20 They can be the same or different.

[0167] [Chemical Formula 4] In formula (a), Indicates the bonding location.

[0168] Furthermore, R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents. Specific examples of substituents include the above-mentioned substituent W, wherein halogen atoms, alkyl, alkyl carbonyl, alkoxy carbonyl, alkyl carbonyloxy, or alkoxy are preferred.

[0169] Examples of alkyl groups include straight-chain alkyl groups with 1 to 18 carbon atoms, branched alkyl groups with 3 to 18 carbon atoms, and cyclic alkyl groups. Specifically, examples include methyl, ethyl, propyl, butyl, isopropyl, tert-butyl, and cyclohexyl.

[0170] Examples of alkenyl groups include those with 2 to 12 carbon atoms. Specifically, examples include vinyl, 1-propenyl, 1-butenyl, 1-methyl-1-propenyl, 1-cyclopentenyl, and 1-cyclohexenyl.

[0171] Examples of aryl groups include those with 6 to 12 carbon atoms. Specifically, examples include phenyl, α-methylphenyl, and naphthyl groups.

[0172] Examples of alkylene aryl groups include those with 7 to 30 carbon atoms.

[0173] The number of substituents X containing one or more groups a is preferably two or more, more preferably three or more, from the viewpoint of having a better orientation degree of the light absorption anisotropic film. Furthermore, from the viewpoint of being able to further suppress orientation defects, it is preferably 18 or less, more preferably 12 or less, even more preferably 9 or less, and especially preferably 6 or less.

[0174] From the viewpoint of superior effect of the present invention and superior orientation of the light absorption anisotropic film, the repeating unit A is preferably a repeating unit A-1 represented by the following formula (A-1).

[0175] [Chemical Formula 5] In equation (A-1), R A1 R A2 and R A3 As explained in equation (A) above, R a1 R a2 and R a3 Same as described in (a) above.

[0176] When m in equation (A-1) is an integer greater than 2, multiple R a1 They can be the same or different, multiple R a2 They can be the same or different, multiple R a3 They can be the same or different.

[0177] In formula (A-1), L A1 Indicates a single bond, -O-, or -NR Z -. Among them, R Z It represents a hydrogen atom or a substituent.

[0178] Regarding L A1 -NR Z -, as R Z The substituents in the form are preferably alkyl groups, more preferably straight-chain alkyl groups with 1 to 4 carbon atoms, and even more preferably methyl or ethyl groups.

[0179] L A1 -O- or NH- are preferred, with -O- being more preferred.

[0180] In formula (A-1), L A2 This indicates a single bond or an m+1 valence linkage group.

[0181] As L A2 The m+1 valence linking group in the group can be exemplified by, for example, an m+1 valence hydrocarbon group that may have 1 to 10 carbon atoms with substituents and in which a portion of the carbon atom constituting the hydrocarbon group may be replaced by a heteroatom.

[0182] Here, the substituents that may be present in the hydrocarbon group are preferably alkyl groups, more preferably straight-chain alkyl groups with 1 to 4 carbon atoms, and even more preferably methyl or ethyl groups.

[0183] Furthermore, examples of heteroatoms include silicon atoms, oxygen atoms, and nitrogen atoms.

[0184] In formula (A-1), m represents an integer of 1 or more. From the viewpoint of having a better orientation degree of the light absorption anisotropic film, it is preferably an integer of 2 or more, more preferably an integer of 3 or more. Furthermore, from the viewpoint of being able to further suppress orientation defects, it is preferably an integer of 18 or less, more preferably an integer of 12 or less, even more preferably an integer of 9 or less, and especially preferably an integer of 6 or less.

[0185] As a specific example of repeating unit A, one can cite repeating units corresponding to the monomers represented by the following formulas K-1 to K-33. Furthermore, in the embodiments described later, the monomer represented by the following formula K-1 will be referred to as "monomer K-1". The same applies to other monomers.

[0186] Furthermore, the monomer represented by formula K-29 is a mixture of monomers with different numbers of -(O-Si(CH3)2)-, and therefore the average value is n≈11. The same applies to the monomer represented by K-30.

[0187] [Chemical Formula 6] [Chemical Formula 7] The content of repeating unit A relative to all repeating units (100% by mass) in a particular polymer is preferably 10-90% by mass, more preferably 15-80% by mass, and even more preferably 20-70% by mass. If the content of repeating unit A is within the above range, the effect of the present invention is more excellent, and the orientation degree of the light absorption anisotropic film is more excellent.

[0188] The repeating unit A in a specific polymer may contain one type or two or more types. In the case where there are two or more repeating units A, the content of the repeating unit A mentioned above represents the total content of the repeating units A.

[0189] <Repeating Unit B> The repeating unit B is the repeating unit represented by the following formula (B).

[0190] It is believed that repeating unit B with an amide structure can improve the compatibility of the copolymer with the liquid crystal compound. As a result, it is inferred that a light-absorbing anisotropic film with fewer orientation defects was obtained.

[0191] [Chemical Formula 8] In equation (B), R B1 R B2 and R B3 Each can be independently represented by a hydrogen atom, halogen atom, cyano group, alkyl group, alkenyl group, or aryl group.

[0192] As R B1 R B2 and R B3 Alkyl groups, for example, include straight-chain alkyl groups with 1 to 18 carbon atoms (preferably 1 to 6 carbon atoms, more preferably 1 to 4 carbon atoms), branched-chain alkyl groups with 3 to 18 carbon atoms (preferably 3 to 9 carbon atoms, more preferably 3 to 6 carbon atoms). Specifically, examples include methyl, ethyl, propyl, butyl, isopropyl, tert-butyl, and cyclohexyl.

[0193] As R B1 R B2 and R B3 The alkenyl groups in alkenyl groups can be categorized as linear alkenyl groups with 2 to 18 carbon atoms or branched alkenyl groups with 3 to 18 carbon atoms. Specifically, examples include vinyl, aryl, 2-butenyl, and 3-pentenyl alkenyl groups.

[0194] As R B1 R B2 and R B3 The aryl group in the compound can be exemplified by aryl groups having 6 to 30 carbon atoms (preferably 6 to 20 carbon atoms, more preferably 6 to 12 carbon atoms). Specifically, examples include phenyl, 2,6-diethylphenyl, 3,5-ditrifluoromethylphenyl, styryl, naphthyl, and biphenyl.

[0195] R B1 R B2 and R B3 Preferably, it is a hydrogen atom or an alkyl group, more preferably a hydrogen atom or a methyl group, and even more preferably a hydrogen atom.

[0196] In equation (B), R B4 and R B5 Each can be used independently to represent a hydrogen atom or a substituent. In R B4 and R B5 In the case of substituents, R B4 and R B5 They can be connected to form a ring. R B4 molecular weight and R B5The total molecular weight is preferably 200 or less, more preferably 100 or less, and even more preferably 70 or less. The detailed reasons for this are not yet clear, but it is generally inferred as follows: That is, it is believed that if the total molecular weight is 100 or less, the steric hindrance of the substituents disappears, and the specific copolymer does not hinder the orientation of the liquid crystal compound and the dichroic substance. As a result, the degree of order of the liquid crystal increases, and the orientation degree of the light absorption anisotropic film is more excellent.

[0197] R B4 molecular weight and R B5 The lower limit of the total molecular weight is preferably 2 or more.

[0198] As R B4 and R B5 From the viewpoint of achieving better results in this invention, the substituents represented are preferably organic groups, more preferably organic groups with 1 to 15 carbon atoms, even more preferably organic groups with 1 to 12 carbon atoms, and especially preferably organic groups with 1 to 8 carbon atoms.

[0199] Examples of organic groups mentioned above include straight-chain, branched, or cyclic alkyl groups, aromatic hydrocarbon groups, and heterocyclic groups.

[0200] The alkyl group preferably has 1 to 15 carbon atoms, more preferably 1 to 12, and even more preferably 1 to 8.

[0201] The carbon atom of an alkyl group can be represented by -O-, -Si(CH3)2-, or -(Si(CH3)2O). g -、-(OSi(CH3)2) g - (g represents an integer from 1 to 10.), -N(Z)-, -C(Z)=C(Z) 1 )-, -C(Z)=N-, -N=C(Z)-, -C(O)-, -OC(O)-, -C(O)O-, -OC(O)O-, -N(Z)C(O)-, -C(O)N(Z)-, -C(Z)=C(Z 1 )-C(O)O-, -OC(O)-C(Z)=C(Z 1 )-, -C(Z)=N-, -N=C(Z)-, -C(Z)=C(Z 1 )-C(O)N(Z 2 -, -N(Z) 2 )-C(O)-C(Z)=C(Z) 1 -C(Z) = C(Z) 1 )-C(O)-S-, -SC(O)-C(Z)=C(Z 1 -, -C(Z) = NN = C(Z) 1 )-(Z, Z 1 and Z2 Each group independently represents hydrogen, an alkyl group, a cycloalkyl group, an aryl group, a cyano group, or a halogen atom having 1 to 4 carbon atoms, and groups consisting of -C≡C-, -N=N-, -S-, -C(S)-, -S(O)-, -SO2-, -(O)S(O)O-, -O(O)S(O)O-, -SC(O)-, and -C(O)S-, as well as groups formed by combining two or more of these groups. From the viewpoint of better performance of the present invention, groups that allow the substitution of the carbon atoms of the alkyl group are preferably -O-, -C(O)-, -N(Z)-, -OC(O)-, or -C(O)O-.

[0202] The hydrogen atom of an alkyl group can be a halogen atom, cyano group, aryl group, nitro group, or -OZ group. H1 -C(O)Z H1 -C(O)OZ H1 -OC(O)Z H1 -OC(O)OZ H1 -NZ H1 Z H2 -NZ H1 C(O)Z H2 -NZ H1 C(O)OZ H2 -C(O)NZ H1 Z H2 -OC(O)NZ H1 Z H2 -NZ H1 C(O)NZ H2 OZ H3 -SZ H1 -C(S)Z H1 -C(O)SZ H1 or -SC(O)Z H1 Replace. Z H1 Z H2 and Z H3 Each group independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, a cyano group, or a nitro group. From the viewpoint of better efficacy of the present invention, -OH, -COOH, or aryl (preferably phenyl) are preferred among the groups in which the hydrogen atom of the alkyl group can be substituted.

[0203] Hydrogen atoms in aromatic hydrocarbon groups and heterocyclic groups can be halogen atoms, cyano groups, alkyl groups with 1 to 10 carbon atoms, cyano groups, nitro groups, and -OZ groups. H1 -C(O)Z H1 -C(O)OZ H1 -OC(O)Z H1 -OC(O)OZ H1 -NZ H1 ZH2 -NZ H1 C(O)Z H2 -NZ H1 C(O)OZ H2 -C(O)NZ H1 Z H2 -OC(O)NZ H1 Z H2 -NZ H1 C(O)NZ H2 OZ H3 -SZ H1 -C(S)Z H1 -C(O)SZ H1 -SC(O)Z H1 -B(OH)₂ substitution. Z H1 Z H2 and Z H3 Each group independently represents a hydrogen atom, a halogen atom, an alkyl group with 1 to 10 carbon atoms, a cyano group, or a nitro group. From the viewpoint of better performance of the present invention, -OH and -B(OH)2 are preferred among the groups in which the hydrogen atoms of the aromatic hydrocarbon group and the hydrogen atoms of the heterocyclic group can be substituted.

[0204] From the viewpoint that the present invention offers superior performance, R B4 and R B5 Each organic group is preferably composed of 1 to 15 hydrogen atoms or carbon atoms. The preferred method for the organic group is as described above.

[0205] From the viewpoint that the present invention offers superior performance, R B4 and R B5 In the presence of the present invention, at least one of the present inventions is preferably a substituent, and more preferably at least one of the present inventions is an organic group having 1 to 15 carbon atoms.

[0206] R B4 and R B5 The ring formed by the linkage is a heterocycle containing the nitrogen atom in formula (B), and may further contain heteroatoms such as oxygen atom, sulfur atom and nitrogen atom.

[0207] From the viewpoint that the present invention offers superior performance, R B4 and R B5 The ring formed by the connection is preferably a 4- to 8-membered ring, more preferably a 5- to 7-membered ring, and even more preferably a 5- to 6-membered ring.

[0208] From the viewpoint that the present invention has superior effects, R is constructed B4 and R B5 The number of carbon atoms in the linked ring is preferably 3 to 7, more preferably 3 to 6.

[0209] RB4 and R B5 The rings formed by the links may or may not be aromatic, but from the viewpoint of achieving better results in this invention, it is preferable that they are not aromatic.

[0210] As R B4 and R B5 Specific examples of rings formed by linkages can be given by the following groups.

[0211] [Chemical Formula 9] The following shows a specific example of repeating unit B, but repeating unit B is not limited to the following structure.

[0212] [Chemical Formula 10] When a particular polymer has repeating unit B, the content of repeating unit B relative to all repeating units (100% by mass) in the particular polymer is preferably 2 to 75% by mass, more preferably 3 to 70% by mass, and even more preferably 5 to 65% by mass. If the content of repeating unit B is within the above range, the effect of the present invention is more superior, and the orientation degree of the light absorption anisotropic film is more superior.

[0213] The repeating unit B in a specific polymer may contain one type or two or more types. When the repeating unit B contains two or more types, the content of the repeating unit B mentioned above represents the total content of the repeating unit B.

[0214] <Repeating Unit D> The repeating unit D is the repeating unit represented by the following formula (D).

[0215] Repeating unit D has a specified spacer (Sp in equation (B) described later). D1 ) and the linking group consisting of a specified ring structure (Cy in formula (B) described later) D Therefore, it is believed that the viscosity of the liquid crystal composition is increased, and the depression is further suppressed.

[0216] Furthermore, it is believed that by having a specified hydrogen-bonding group (D in formula (B) described later), a hydrogen-bonded polymer is formed, which becomes an air interface layer with high planarity suitable for orienting liquid crystal compounds and dichroic substances, thus further improving the orientation degree of the light-absorbing anisotropic film formed.

[0217] [Chemical Formula 11] In equation (D), R D1 RD2 and R D3 Each can be independently represented by a hydrogen atom, halogen atom, cyano group, alkyl group, alkenyl group, or aryl group.

[0218] R D1 R D2 and R D3 Specific examples and preferred embodiments of alkyl, alkenyl and aryl groups in formula (B) are similar to those of R. B1 R B2 and R B3 The alkyl, alkenyl, and aryl groups are the same.

[0219] R D1 R D2 and R D3 Preferably, it is a hydrogen atom or an alkyl group, more preferably a hydrogen atom or a methyl group, and even more preferably a hydrogen atom.

[0220] In formula (D), L D1 It indicates a single bond, -COO-, or -CO-, with -CO- being preferred.

[0221] In equation (D), Sp D1 This refers to a divalent hydrocarbon group with 1 to 20 carbon atoms. The divalent hydrocarbon group can be either straight-chain or branched.

[0222] As Sp D1 The divalent hydrocarbon group having 1 to 20 carbon atoms is, for example, a divalent aliphatic hydrocarbon group having 1 to 20 carbon atoms, a divalent alicyclic hydrocarbon group having 3 to 20 carbon atoms, a divalent aromatic hydrocarbon group having 6 to 20 carbon atoms, a divalent aromatic heterocyclic group having 6 to 20 carbon atoms, etc., with a divalent aliphatic hydrocarbon group having 1 to 20 carbon atoms being preferred.

[0223] Here, as a divalent aliphatic hydrocarbon group having 1 to 20 carbon atoms, an alkylene group having 1 to 15 carbon atoms is preferred, and an alkylene group having 1 to 8 carbon atoms is more preferred. Specifically, suitable examples include methylene, ethylene, propylene, butylene, pentylene, hexylene, methylhexylene, and heptylene.

[0224] Furthermore, constituting Sp D1 In the -CH2- group of the hydrocarbon group, one or more non-adjacent -CH2- groups can be independently replaced by -O-, -S-, -NH- or -N(Q)-. Q represents a substituent, such as the substituent W mentioned above, wherein alkyl, alkoxy or halogen atoms are preferred.

[0225] In formula (D), L D2 and L D3 Each can be used independently to represent a single bond or a divalent linker.

[0226] As L D2and L D3 Examples of divalent linking groups in this context include -C(O)O-, -O-, -S-, and -C(O)NR. L1 -, -SO2- and -NR L1 R L2 - etc. In the formula, R L1 and R L2 Each of the above-mentioned substituents represents a hydrogen atom and an alkyl group having 1 to 6 carbon atoms, which may have substituents. Examples of substituents that may be present in alkyl groups having 1 to 6 carbon atoms include the substituent W described above, wherein alkyl, alkoxy, or halogen atoms are preferred.

[0227] In equation (D), Cy D This indicates a divalent linker containing a mesocrystalline group.

[0228] Mesocrystalline groups refer to groups that represent the main framework of liquid crystal molecules that contribute to the formation of liquid crystals. Liquid crystal molecules exhibit liquid crystal properties, exhibiting an intermediate state (intermediate phase) between the crystalline state and the isotropic liquid state. There are no particular limitations regarding mesocrystalline groups; for example, one can refer to the description in "Flussige Kristalle in Tabellen II" (VEB Deutsche Verlag fur Grundstoff Industrie, Leipzig, 1984), especially pages 7-16, and the description in "Liquid Crystal Handbook" (Maruzen, 2000), especially Chapter 3, edited by the Liquid Crystal Handbook Editorial Committee.

[0229] The mesocrystalline group preferably comprises 1 to 10 cyclic structures, more preferably 1 to 7. Specific examples of cyclic structures include aromatic hydrocarbon groups, heterocyclic groups, and alicyclic groups.

[0230] Cy D The divalent linking group containing the mesocrystalline group is preferably a divalent mesocrystalline group. Examples of divalent mesocrystalline groups include divalent aromatic hydrocarbon groups, divalent heterocyclic groups, and divalent alicyclic groups.

[0231] Specific examples of divalent aromatic hydrocarbon groups include phenylene, naphthylene, fluorene-diyl, anthracene-diyl, and tetraphenyl-diyl.

[0232] As a divalent heterocyclic group, it can be either aromatic or non-aromatic, but from the viewpoint of further improving the degree of orientation, a divalent aromatic heterocyclic group is preferred.

[0233] Examples of atoms other than carbon that constitute a divalent aromatic heterocyclic group include nitrogen, sulfur, and oxygen atoms. In cases where an aromatic heterocyclic group has multiple atoms constituting the ring other than carbon, these atoms can be the same or different.

[0234] Specific examples of divalent aromatic heterocyclic groups include pyridinyl (pyridin-diyl), pyridazinyl (pyridinyl), imidazole-diyl, thiophene (thiophene-diyl), quinolineyl (quinoline-diyl), isoquinolineyl (isoquinoline-diyl), oxazole-diyl, thiazole-diyl, oxadiazole-diyl, benzothiazole-diyl, benzothiadiazole-diyl, phthalimide-diyl, thienothiazole-diyl, thiazonothiazole-diyl, thienothiphene-diyl, and thienooxazole-diyl.

[0235] Specific examples of divalent alicyclic groups include cyclopentylene and cyclohexylene, where the carbon atom can be replaced by -O-, -Si(CH3)2-, or -N(Z-). M )-(Z M Represents hydrogen, alkyl, cycloalkyl, aryl, cyano or halogen atoms with 1 to 4 carbon atoms, -C(O)-, -S-, -C(S)-, -S(O)- and -SO2-, and groups formed by combining two or more of these groups.

[0236] From the viewpoints of superior performance of the present invention and superior orientation of the anisotropic light absorption film, Cy D Preferably, it is composed of the following formula (Cy D -1)~(Cy D The 2-value of any one of the representations in -15) or L D3 At the bonding positions, the carbon atoms constituting the ring structure in the following formula can be replaced by heteroatoms or have substituents. Furthermore, examples of substituents that may be present on the carbon atoms constituting the ring structure include the substituent W described above, preferably alkyl, alkoxy, or halogen atoms.

[0237] [Chemical Formula 12] As derived from the above equation (Cy) D -1)~(Cy DAny of the divalent linking groups represented in -15) can be included, specifically, for example, 1,4-phenylene, 1,4-cyclohexene, 1,4-cyclohexenyl, tetrahydropyran-2,5-diyl, 1,4-piperazinyl, 1,4-piperidinyl, 1,3-dioxane-2,5-diyl, tetrahydrothiaran-2,5-diyl, 1,4-bicyclo(2,2,2)octylene, decahydronaphthalene-2,6-diyl, pyridine-2,5-diyl, pyrimidine- 2,5-Diyl, pyrazin-2,5-Diyl, 1,2,3,4-tetrahydronaphthyl-2,6-Diyl, 2,6-naphthylene, phenanthrene-2,7-Diyl, 9,10-dihydrophenanthrene-2,7-Diyl, 1,2,3,4,4a,9,10a-octahydrophenanthrene-2,7-Diyl, 9-fluorenone-2,7-Diyl, fluoren-2,7-Diyl, thienothieno-3,6-Diyl, carbazole-3,6-Diyl, and carbazole-2,7-Diyl, etc.

[0238] From the perspective of superior orientation of anisotropic light absorption films, Cy in the above equation (B) D Preferably, it is derived from the above formula (Cy D -1), (Cy D -4), (Cy D -7), (Cy) D -10) and (Cy D -13) represents a divalent linker, more preferably a divalent linker represented by the above formula (Cy D -7) and (Cy D Any of the divalent linking groups represented in -13)

[0239] In formula (D), D represents a hydrogen-bonded group consisting of a hydrogen atom and a nonmetallic atom from groups 14 to 16 (periodic table). The nonmetallic atom may have substituents.

[0240] Here, nonmetallic atoms of groups 14 to 16 can be exemplified by oxygen, sulfur, nitrogen, and carbon atoms.

[0241] Furthermore, the substituents that can be present on non-metallic atoms (especially nitrogen and carbon atoms) include, for example, halogen atoms, alkyl groups, alkoxy groups, alkyl-substituted alkoxy groups, cyclic alkyl groups, aryl groups (e.g., phenyl, naphthyl, etc.), cyano groups, amino groups, nitro groups, alkyl carbonyl groups, sulfonyl groups, and hydroxyl groups.

[0242] Examples of such hydrogen-bonding groups include hydrogen-bonding donor groups and hydrogen-bonding acceptor groups.

[0243] Specifically, examples of hydrogen bond-donating groups include amino, amide, urea, carbamate, sulfonamide, sulfonyl, phosphate group, hydroxyl, mercapto, carboxyl, methylene substituted with an electron-withdrawing group, and methine substituted with an electron-withdrawing group, among which carboxyl and amide groups are preferred.

[0244] Specifically, examples of hydrogen bond accepting groups include heteroatoms with lone pairs of electrons on heterocycles, hydroxyl groups, aldehydes, ketones, carboxyl groups, carboxylic acid esters, carboxylic acid amides, lactones, lactams, sulfonamides, sulfonyl groups, phosphate groups, phosphate amides, carbamates, ureas, ether structures (especially high molecular structures with oxygen atoms included in polyether structures), aliphatic amines, aromatic amines, etc., with carboxyl groups and amide groups being preferred.

[0245] In equation (D), n represents an integer from 1 to 3. When n is 2 or 3, multiple L D2 They can be the same or different, multiple Cy D They can be the same or different.

[0246] In this invention, considering that it is more difficult to observe the haze of the light-absorbing anisotropic film (the haze becomes better), n in the above formula (D) is preferably 1 or 2, and considering that it is more preferably 2 when forming the light-absorbing anisotropic film to further suppress the depression.

[0247] In this invention, considering the reason that the orientation degree of the formed anisotropic light-absorbing film becomes higher, it is preferable that the repeating unit D is L in the above formula (D). D3 This indicates a single bond; D represents -COOH or -NHCOR. 2 or -CONHR 3 Repeating units.

[0248] Here, R 2 and R 3 Each alkyl or alkenyl group independently represents an alkyl group having 1 to 10 carbon atoms. Alkyl and alkenyl groups can be linear or branched. In particular, one or more non-adjacent -CH2- groups that constitute part of the alkyl or alkenyl group can be replaced by -O-.

[0249] Furthermore, in this invention, considering that it is more difficult to observe the haze of anisotropic light absorption films, it is preferable that the repeating unit D is L in the above formula (D). D3 Indicates a single bond, D represents -NHCOR 4 Repeating units.

[0250] Here, R 4This refers to an alkyl or alkenyl group having 1 to 3 carbon atoms. Alkyl and alkenyl groups can be linear or branched. In particular, one or more non-adjacent -CH2- groups that constitute part of the alkyl or alkenyl group can be replaced by -O-.

[0251] As monomers forming repeating unit D, examples include monomers represented by the following formula. Furthermore, in the following formula, Me represents a methyl group, and Ac represents an acetyl group.

[0252] [Chemical Formula 13] [Chemical Formula 14] [Chemical Formula 15] [Chemical Formula 16] When a particular polymer has repeating unit D, the content of repeating unit D relative to all repeating units (100% by mass) in the particular polymer is preferably 5 to 85% by mass, more preferably 10 to 75% by mass, and even more preferably 20 to 70% by mass. If the content of repeating unit D is within the above range, the effect of the present invention is more excellent, and the orientation degree of the light absorption anisotropic film is more excellent.

[0253] The repeating unit D in a specific polymer may contain one type or two or more types. In the case where there are two or more repeating units D, the content of the repeating unit D mentioned above represents the total content of the repeating units D.

[0254] <Repeating Unit X> A particular polymer may have a repeating unit X represented by the formula X.

[0255] [Chemical Formula 17] In equation (X), R X1 R X2 and R X3 Each can be independently represented by a hydrogen atom, alkyl group, alkenyl group, or aryl group.

[0256] R X1 R X2 and R X3Specific examples and preferred embodiments of alkyl, alkenyl and aryl groups in formula (B) are similar to those of R. B1 R B2 and R B3 The alkyl, alkenyl, and aryl groups are the same.

[0257] R X1 R X2 and R X3 Preferably, it is a hydrogen atom or an alkyl group, more preferably a hydrogen atom or a methyl group, and even more preferably a hydrogen atom.

[0258] L X1 This indicates a single bond or -CO-, with -CO- being preferred.

[0259] In formula (X), L X2 This refers to a divalent aliphatic hydrocarbon group with 1 to 20 carbon atoms. Aliphatic hydrocarbon groups can be straight-chain or branched.

[0260] As a divalent aliphatic hydrocarbon group with 1 to 20 carbon atoms, an alkylene group with 1 to 15 carbon atoms is preferred, and an alkylene group with 1 to 8 carbon atoms is more preferred. Specifically, suitable examples include methylene, ethylene, propylene, butylene, pentylene, hexylene, methylhexylene, and heptylene.

[0261] Composition of L X2 In the hydrocarbon group, one or more of the -CH2- groups can be independently replaced by -O-, -C(O)O- or phenylene.

[0262] In formula (X), B represents a boron atom.

[0263] In equation (X), R X4 and R X5 Each of the following can be independently represented: a hydrogen atom, an alkyl group that may have substituents, an aryl group that may have substituents, or a heteroaryl group that may have substituents. From the viewpoint of superiority in at least one of tightness and orientation, a hydrogen atom or an alkyl group that may have substituents is preferred.

[0264] There is no particular limitation on the number of carbon atoms in the alkyl group, but 1 to 10 is preferred, and 1 to 5 is more preferred. Examples of alkyl groups include methyl, ethyl, and propyl.

[0265] There is no particular limitation on the number of carbon atoms in the aryl group, but 4 to 20 is preferred, and 6 to 12 is more preferred. For example, phenyl can be cited as an aryl group.

[0266] There is no particular limitation on the number of carbon atoms in the heteroaryl group, but 3 to 10 is preferred, and 3 to 5 is more preferred. Examples of heteroatoms included in the heteroaryl group include oxygen, nitrogen, and sulfur atoms.

[0267] R X4 and RX5 They can bond together to form a ring.

[0268] The following shows a specific example of a repeating unit X, but the repeating unit X is not limited to the following structure.

[0269] [Chemical Formula 18] When a particular polymer has repeating unit X, the content of repeating unit X relative to all repeating units (100% by mass) in the particular polymer is preferably 3 to 75% by mass, more preferably 5 to 70% by mass, and even more preferably 10 to 60% by mass. If the content of repeating unit X is within the above range, the effect of the present invention is more superior, and the orientation degree of the light absorption anisotropic film is more superior.

[0270] The repeating unit X in a specific polymer may contain one type or two or more types. In the case where there are two or more repeating units X, the content of the repeating unit X mentioned above represents the total content of the repeating units X.

[0271] <Repeating Unit Y> A particular polymer may have a repeating unit Y represented by the formula Y.

[0272] [Chemical Formula 19] In formula (Y), R Y1 R Y2 and R Y3 Each can be independently represented by a hydrogen atom, alkyl group, alkenyl group, or aryl group.

[0273] R Y1 R Y2 and R Y3 Specific examples and preferred embodiments of alkyl, alkenyl and aryl groups in formula (B) are similar to those of R. B1 R B2 and R B3 The alkyl, alkenyl, and aryl groups are the same.

[0274] R Y1 R Y2 and R Y3 Preferably, it is a hydrogen atom or an alkyl group, more preferably a hydrogen atom or a methyl group, and even more preferably a hydrogen atom.

[0275] In formula (Y), L Y1 This indicates a single bond or -CO-, with -CO- being preferred.

[0276] In formula (Y), L Y2 This refers to a divalent aliphatic hydrocarbon group with 1 to 20 carbon atoms. Aliphatic hydrocarbon groups can be straight-chain or branched.

[0277] As a divalent aliphatic hydrocarbon group with 1 to 20 carbon atoms, an alkylene group with 1 to 15 carbon atoms is preferred, and an alkylene group with 1 to 8 carbon atoms is more preferred. Specifically, suitable examples include methylene, ethylene, propylene, butylene, pentylene, hexylene, methylhexylene, and heptylene.

[0278] Composition of L Y2 In the hydrocarbon group, one or more of the -CH2- groups can be independently replaced by -O-, -C(O)O- or phenylene.

[0279] Composition of L Y2 In the hydrocarbon group, one or more hydrogen atoms can be replaced by -OH or the like.

[0280] In formula (Y), Q Y The preferred method is the same, representing the crosslinking groups represented by the above formulas (P1) to (P30).

[0281] The following shows a specific example of a repeating unit Y, but the repeating unit Y is not limited to the following structure.

[0282] [Chemical Formula 20] When a particular polymer has repeating unit Y, the content of repeating unit Y relative to all repeating units (100% by mass) in the particular polymer is preferably 3 to 75% by mass, more preferably 5 to 70% by mass, and even more preferably 10 to 60% by mass. If the content of repeating unit X is within the above range, the effect of the present invention is even better, and the orientation degree of the light absorption anisotropic film is even better.

[0283] The repeating unit Y in a specific polymer may contain one type or two or more types. In the case where there are two or more repeating units Y, the content of the repeating unit Y mentioned above represents the total content of the repeating units Y.

[0284] <Repeating Unit Z> A particular polymer may have a repeating unit Z represented by the formula Z.

[0285] [Chemical Formula 21] In formula (Z), R Z1 R Z2 and R Z3 Each can be independently represented by a hydrogen atom, alkyl group, alkenyl group, or aryl group.

[0286] R Z1 R Z2 and RZ3 Specific examples and preferred embodiments of alkyl, alkenyl and aryl groups in formula (B) are similar to those of R. B1 R B2 and R B3 The alkyl, alkenyl, and aryl groups are the same.

[0287] R Z1 R Z2 and R Z3 Preferably, it is a hydrogen atom or an alkyl group, more preferably a hydrogen atom or a methyl group, and even more preferably a hydrogen atom.

[0288] In formula (Z), L Z1 This indicates a single bond or -CO-, with -CO- being preferred.

[0289] In formula (Z), L Z2 This represents a single bond or a divalent aliphatic hydrocarbon group with 1 to 20 carbon atoms. Aliphatic hydrocarbon groups can be straight-chain or branched. Among them, L... Z1 and L Z2 It cannot be a single key at the same time.

[0290] As a divalent aliphatic hydrocarbon group with 1 to 20 carbon atoms, an alkylene group with 1 to 15 carbon atoms is preferred, and an alkylene group with 1 to 8 carbon atoms is more preferred. Specifically, suitable examples include methylene, ethylene, propylene, butylene, pentylene, hexylene, methylhexylene, and heptylene.

[0291] Composition of L Z2 In the hydrocarbon group, one or more -CH2- groups can be independently replaced by -O- groups.

[0292] In formula (Z), R Z4 It represents a hydrogen atom, -OH, or aryl group.

[0293] Examples of aryl groups include those with 6 to 30 carbon atoms (preferably 6 to 20 carbon atoms, more preferably 6 to 12 carbon atoms). Specifically, examples include phenyl, 2,6-diethylphenyl, 3,5-ditrifluoromethylphenyl, styryl, naphthyl, and biphenyl.

[0294] The following shows a specific example of the repeating unit Z, but the repeating unit Z is not limited to the following structure.

[0295] [Chemical Formula 22] When a particular polymer has repeating unit Z, the content of repeating unit Z relative to all repeating units (100% by mass) in the particular polymer is preferably 0.05 to 60% by mass, more preferably 0.05 to 30% by mass, even more preferably 0.05 to 10% by mass, and particularly preferably 0.05 to 5% by mass. If the content of repeating unit Z is within the above range, the effect of the present invention is more superior, and the orientation degree of the light absorption anisotropic film is more superior.

[0296] The repeating unit Z in a specific polymer may contain one type or two or more types. In the case where there are two or more repeating units Z, the content of the repeating unit Z mentioned above represents the total content of the repeating units Z.

[0297] <Content> The content of the specific polymer relative to the total solid content of the liquid crystal composition is preferably 0.01 to 10% by mass, more preferably 0.02 to 5% by mass, and even more preferably 0.2 to 1.5% by mass. If the content of the specific polymer is within the above range, the effect of the present invention is more excellent, and the orientation degree of the light absorption anisotropic film is more excellent.

[0298] The content of the specific polymer relative to 100 parts by mass of the total amount of the liquid crystal compound and the dichroic substance in the liquid crystal composition is preferably 0.01 to 10 parts by mass, more preferably 0.02 to 5 parts by mass, and even more preferably 0.2 to 1.5 parts by mass. If the content of the specific polymer is within the above range, the effect of the present invention is more excellent, and the orientation degree of the light absorption anisotropic film is more excellent.

[0299] <Mass ratio of specific polymer to dichroic substance> The mass ratio of the content of the specific polymer to the content of the dichroic substance (content of the specific polymer / content of the dichroic substance) is preferably 0.0007 to 0.6, more preferably 0.0012 to 0.3, and even more preferably 0.008 to 0.15.

[0300] If the mass ratio is within the specified range, the orientation of the anisotropic light absorption film is superior. This is presumably because the compatibility of the specific polymer with the dichroic material becomes better.

[0301] <Molecular weight> From the viewpoint of achieving better results from the present invention, the weight-average molecular weight (Mw) of the specific polymer is preferably 2,000 to 1,000,000, more preferably 3,000 to 200,000, and even more preferably 5,000 to 80,000.

[0302] Here, the weight-average molecular weight of a particular polymer can be determined by the method described in the Examples section below.

[0303] [Other ingredients] The liquid crystal composition of the present invention may contain components other than the liquid crystal compound, dichroic substance and specific polymer described above (hereinafter also referred to as "other components").

[0304] Other components include, for example, surface modifiers, orientation agents, polymerization initiators, and solvents.

[0305] <surfactants> The liquid crystal composition of the present invention may contain a surfactant. By containing a surfactant, it is expected that the smoothness of the coated surface will be improved, the degree of orientation will be further improved, or depressions and unevenness will be suppressed and the in-plane uniformity will be further improved.

[0306] Fluoro(meth)acrylate polymers described in Japanese Patent Application Publication No. 2007-272185,

[0018] to

[0043] , etc., can be used as surfactants. Other compounds besides these can also be used as surfactants. One surfactant can be used alone, or two or more can be used in combination.

[0307] When the liquid crystal composition of the present invention contains a surfactant, the content of the surfactant relative to the total solid content of the liquid crystal composition is preferably 0.01 to 10% by mass, more preferably 0.02 to 5% by mass.

[0308] <Orientation Agent> The liquid crystal composition of the present invention may contain an alignment agent. Examples of alignment agents include boric acid compounds and onium salts. The boric acid compound functions as a horizontal or vertical alignment agent. Furthermore, the onium salt functions as a vertical alignment agent. One alignment agent may be used alone, or two or more may be used in combination.

[0309] As a boric acid compound, the compound represented by formula (30) is preferred.

[0310] Equation (30) [Chemical Formula 23] In equation (30), R 1 and R 2 Each of the following can be independently represented: a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group.

[0311] R 3 This indicates a substituent containing a (meth)acryloyl group.

[0312] As a specific example of boric acid compounds, one can cite the boric acid compounds represented by general formula (I) described in paragraphs 0023 to 0032 of Japanese Patent Application Publication No. 2008-225281.

[0313] The following compounds are also preferred as boric acid compounds.

[0314] [Chemical Formula 24] Specific examples of onium salts include those described in paragraphs 0052 to 0058 of Japanese Patent Application Publication No. 2012-208397, those described in paragraphs 0024 to 0055 of Japanese Patent Application Publication No. 2008-026730, and those described in Japanese Patent Application Publication No. 2002-37777.

[0315] When the liquid crystal composition of the present invention contains an alignment agent, the content of the alignment agent relative to the total solid content of the liquid crystal composition is preferably 0.01 to 30% by mass, more preferably 0.1 to 10% by mass.

[0316] <Polymerization Initiator> The liquid crystal composition of the present invention may contain a polymerization initiator. There are no particular limitations on the polymerization initiator, but it is preferred to use a photosensitive compound, i.e., a photopolymerization initiator.

[0317] As photopolymerization initiators, a wide variety of compounds can be used without particular limitations. Examples of photopolymerization initiators include α-carbonyl compounds (as described in U.S. Patent Nos. 2,367,661 and 2,367,670), azobin ethers (as described in U.S. Patent No. 2,448,828), α-hydrocarbon-substituted aromatic azobin compounds (as described in U.S. Patent No. 2,722,512), polynuclear quinone compounds (as described in U.S. Patent Nos. 3,046,127 and 2,951,758), and combinations of triarylimidazolium dimers and p-aminophenyl ketones (as described in U.S. Patent No. 3,549,367). The list includes compounds such as acridine and phenazine compounds (Japanese Patent Application Publication No. 60-105667, US Patent No. 4239850), oxadiazole compounds (US Patent No. 4212970), o-acyl oxime compounds (Japanese Patent Application Publication No. 2016-27384

[0065] ), and acylphosphine oxide compounds (Japanese Patent Application Publication No. 63-40799, Japanese Patent Application Publication No. 5-29234, Japanese Patent Application Publication No. 10-95788, and Japanese Patent Application Publication No. 10-29997).

[0318] Commercially available products can also be used as photopolymerization initiators, such as Irgacure 184, Irgacure 907, Irgacure 369, Irgacure 651, Irgacure 819, Irgacure OXE-01 and Irgacure OXE-02 manufactured by BASF.

[0319] Polymerization initiators can be used alone or in combination with two or more.

[0320] When the liquid crystal composition of the present invention contains a polymerization initiator, the content of the polymerization initiator relative to the total solid content of the liquid crystal composition is preferably 0.01 to 30% by mass, more preferably 0.1 to 15% by mass.

[0321] <Solvent> From the viewpoint of operability, etc., the liquid crystal composition of the present invention preferably contains a solvent.

[0322] Examples of solvents include ketones (e.g., acetone, 2-butanone, methyl isobutyl ketone, cyclopentanone, and cyclohexanone), ethers (e.g., dioxane, tetrahydrofuran, tetrahydropyran, dioxolane, tetrahydrofurfuryl alcohol, and cyclopentylmethyl ether), aliphatic hydrocarbons (e.g., hexane), alicyclic hydrocarbons (e.g., cyclohexane), aromatic hydrocarbons (e.g., benzene, toluene, xylene, and trimethylbenzene), carbon halogens (e.g., dichloromethane, chloroform, dichloroethane, dichlorobenzene, and chlorotoluene), and esters (e.g., ethyl acetate). Organic solvents such as methyl esters, ethyl acetate, butyl acetate, diethyl carbonate, etc., alcohols (e.g., ethanol, isopropanol, butanol, cyclohexanol, etc.), cellosols (e.g., methyl cellosol, ethyl cellosol, and 1,2-dimethoxyethane, etc.), cellosol acetates, sulfoxides (e.g., dimethyl sulfoxide, etc.), amides (e.g., dimethylformamide and dimethylacetamide, N-methylpyrrolidone, N-ethylpyrrolidone, 1,3-dimethyl-2-imidazolinone, etc.), and heterocyclic compounds (e.g., pyridine, etc.), and water. These solvents may be used alone or in combination of two or more.

[0323] Among these solvents, organic solvents are preferred for the sake of superior performance of the present invention, and halogenated carbons or ketones are more preferred.

[0324] When the liquid crystal composition of the present invention contains a solvent, the solvent content relative to the total mass of the liquid crystal composition is preferably 70 to 99% by mass, more preferably 83 to 97% by mass, and even more preferably 85 to 95% by mass.

[0325] [Anisotropic light absorption film] The light-absorbing anisotropic film of the present invention is a light-absorbing anisotropic film (light-absorbing anisotropic layer) formed using the liquid crystal composition of the present invention described above.

[0326] There are no particular limitations on the method for manufacturing the light-absorbing anisotropic film of the present invention. However, considering that the degree of orientation of the obtained light-absorbing anisotropic film is higher, it is preferable to include the following steps in sequence (hereinafter also referred to as "the manufacturing method of the present invention"): a step of coating the above-mentioned liquid crystal composition onto an alignment film to form a coating film (hereinafter also referred to as "coating film forming step"); and a step of aligning the liquid crystal components contained in the above-mentioned coating film (hereinafter also referred to as "alignment step").

[0327] In addition, the liquid crystal component not only includes the aforementioned liquid crystal compound, but also includes dichroic substances with liquid crystal properties.

[0328] The following is a description of each process.

[0329] [Coating film formation process] The coating film formation process is a process of coating the above-mentioned liquid crystal composition onto the alignment film to form a coating film.

[0330] By using a liquid crystal composition containing the above-mentioned solvent, or by using a substance that forms a liquid liquid such as a melt by heating, it is easy to coat the liquid crystal composition onto the alignment film.

[0331] Commonly known methods for coating liquid crystal compositions include roller coating, gravure printing, spin coating, wire rod coating, extrusion coating, direct gravure coating, reverse gravure coating, die coating, spray coating, and inkjet coating.

[0332] <Orientation film> Alignment films can be formed by methods such as friction treatment of the film surface of an organic compound (preferably a polymer), tilted evaporation of an inorganic compound, formation of a layer with microgrooves, or accumulation of organic compounds (e.g., ω-trisanoic acid, dioctadecylmethylammonium chloride, methyl stearate, etc.) based on the Lambbrogedt process (LB film). Furthermore, alignment films that generate alignment functions by imparting an electric field, a magnetic field, or light irradiation are also known. In this invention, from the viewpoint of ease of controlling the pretilt angle of the alignment film, an alignment film formed by friction treatment is preferred; from the viewpoint of alignment uniformity, a photo-alignment film formed by light irradiation is also preferred.

[0333] (Friction-treated orientation film) Polymer materials used in alignment films formed by friction processing have been described in numerous documents, and many commercially available products are readily available. In this invention, polyvinyl alcohol or polyimide and its derivatives are preferably used. Regarding the alignment film, reference can be made to the description on page 43, line 24 to page 49, line 8 of International Publication No. 2001 / 88574A1. The thickness of the alignment film is preferably 0.01 to 10 μm, more preferably 0.01 to 1 μm.

[0334] (Photoalignment film) Photoalignment materials used in alignment films formed by light irradiation have been described in numerous documents. In this invention, preferred examples include, for instance, Japanese Patent Application Publication Nos. 2006-285197, 2007-76839, 2007-138138, 2007-94071, 2007-121721, 2007-140465, 2007-156439, 2007-133184, 2009-109831, Japanese Patent Nos. 3883848, and 4151746. Nitrogen compounds, aromatic ester compounds described in Japanese Patent Application Publication No. 2002-229039, maleimides and / or alkenyl-substituted nadicimides having photo-orientation units described in Japanese Patent Application Publication No. 2002-265541 and No. 2002-317013, photocrosslinkable silane derivatives described in Japanese Patent No. 4205195 and No. 4205198, photocrosslinkable polyimides, polyamides, or esters described in Japanese Patent Application Publication No. 2003-520878, No. 2004-529220, or No. 4162850. More preferably, azo compounds, photocrosslinkable polyimides, polyamides, or esters.

[0335] The photo-alignment film is manufactured by irradiating the photo-alignment film formed from the above materials with linearly polarized light or unpolarized light.

[0336] In this specification, "linearly polarized light irradiation" and "unpolarized light irradiation" refer to operations used to induce a photoreaction in a photo-alignment material. The wavelength of the light used varies depending on the photo-alignment material used, and is not particularly limited as long as it is the wavelength required for the photoreaction. The peak wavelength of the light used in the irradiation is preferably 200 nm to 700 nm, and more preferably ultraviolet light with a peak wavelength of 400 nm or less.

[0337] Light sources used in illumination can include commonly used light sources such as tungsten lamps, halogen lamps, xenon lamps, xenon flash lamps, mercury lamps, mercury-xenon lamps, and carbon arc lamps, various lasers [e.g., semiconductor lasers, helium-neon lasers, argon-ion lasers, helium-cadmium lasers, and YAG (yttrium aluminum garnet) lasers], light-emitting diodes, and cathode ray tubes.

[0338] Methods for obtaining linearly polarized light include using polarizers (e.g., iodine polarizers, dichroic material polarizers, and wire-grid polarizers), using prism elements (e.g., Glan-Thomson prisms), using reflective polarizers with Brewster angles, or using light emitted from a laser source with polarized light. Furthermore, filters or wavelength conversion elements can be used to selectively illuminate only the desired wavelength of light.

[0339] When the irradiated light is linearly polarized, the alignment film is irradiated from above or behind in a direction perpendicular or oblique to the surface of the alignment film. The incident angle of the light varies depending on the photoalignment material, but is preferably 0 to 90° (perpendicular), and more preferably 40 to 90°.

[0340] In the case of unpolarized light, the alignment film is irradiated with unpolarized light from an inclined direction. The incident angle is preferably 10 to 80°, more preferably 20 to 60°, and even more preferably 30 to 50°.

[0341] The irradiation time is preferably 1 minute to 60 minutes, more preferably 1 minute to 10 minutes.

[0342] When patterning is required, the method of applying light through a photomask to create the pattern the required number of times can be used, or the pattern can be written by laser scanning.

[0343] [Orientation process] The alignment process is a process of aligning the dichroic material contained in the coated film. This yields the light-absorbing anisotropic film of the present invention. It is understood that in the alignment process, the dichroic material is aligned along the liquid crystal compound oriented through the alignment film.

[0344] The orientation process may include a drying process. This drying process removes components such as solvents from the coated film. The drying process can be performed by placing the coated film at room temperature for a specified time (e.g., natural drying), or by heating and / or air supply.

[0345] Here, the dichroic substances contained in the liquid crystal composition are sometimes oriented through the above-described coating film formation process or drying process. For example, sometimes in the method of preparing the liquid crystal composition into a coating liquid containing a solvent, the solvent is removed from the coating film by drying the coating film, and the dichroic substances contained in the coating film are oriented to obtain the light absorption anisotropic film of the present invention.

[0346] The orientation process preferably includes a heat treatment. This further orients the dichroic substances contained in the coated film, resulting in a higher degree of orientation of the obtained anisotropic light-absorbing film.

[0347] From the perspective of manufacturing applicability, the heat treatment is preferably 10–250°C, more preferably 25–190°C. Furthermore, the heating time is preferably 1–300 seconds, more preferably 1–60 seconds.

[0348] The orientation process can include a cooling process performed after the heat treatment. The cooling process involves cooling the heated coated film to approximately room temperature (20–25°C). This further fixes the orientation of the dichroic substances contained in the coated film, and the degree of orientation of the resulting anisotropic light-absorbing film becomes higher. There are no particular limitations on the cooling method; it can be implemented using known methods.

[0349] Through the above processes, the light absorption anisotropic film of the present invention can be obtained.

[0350] [Other processes] This manufacturing method may include a step (hereinafter also referred to as the "curing step") after the above-mentioned orientation step to cure the light-absorbing anisotropic film.

[0351] The curing process is carried out, for example, by heating and / or light exposure (exposure). Preferably, the curing process is carried out by light exposure.

[0352] The light source used for curing can be various types of light sources such as infrared, visible light, or ultraviolet light, but ultraviolet light is preferred. Furthermore, ultraviolet light can be irradiated while heating is being performed during curing, or ultraviolet light can be irradiated through a filter that allows only specific wavelengths to be transmitted.

[0353] Furthermore, exposure can be performed in a nitrogen environment. In the case of curing anisotropic light-absorbing films via free radical polymerization, the polymerization hindrance caused by oxygen can be reduced; therefore, exposure in a nitrogen environment is preferred.

[0354] There is no particular limitation on the thickness of the light-absorbing anisotropic film, but from the viewpoint of achieving better results in this invention, it is preferably 0.3 to 10 μm, and more preferably 0.5 to 9 μm.

[0355] The orientation states of the liquid crystal compound and dichroic material contained in the light-absorbing anisotropic film of the present invention are fixed.

[0356] As one embodiment of the light-absorbing anisotropic film of the present invention, an example is provided where the angle θ (hereinafter also simply referred to as "transmittance center axis angle θ") between the transmittance central axis of the light-absorbing anisotropic film and the normal direction of the surface of the light-absorbing anisotropic film is greater than 45° and less than 90°, more preferably 75° or more and less than 90°, and even more preferably 80° or more and less than 90°.

[0357] A laminate containing an anisotropic light-absorbing film (polarizer) with a transmittance center axis angle θ greater than 45° and less than 90° and a λ / 4 plate (described later) can be suitably used as a circular polarizer.

[0358] Other embodiments of the light-absorbing anisotropic film of the present invention include those in which the transmittance central axis angle θ is 0° or more and 45° or less, more preferably 0° or more and 35° or less, and even more preferably 0° or more and less than 35°.

[0359] A laminate containing anisotropic light absorption films with a transmittance center axis angle θ of 0° or more and 45° or less, and a polarizer having an absorption axis in the plane, can be appropriately used as a viewing angle control film.

[0360] Here, the transmittance center axis refers to the direction representing the highest transmittance when measuring transmittance by changing the tilt angle (polar angle) and tilt direction (azimuth angle) relative to the normal direction of the light absorption anisotropic film surface.

[0361] Specifically, the Mueller matrix at a wavelength of 550 nm was measured using an AxoScan OPMF-1 (manufactured by Opto Science, Inc.). More specifically, during the measurement, the azimuth angle at which the transmittance central axis is tilted was first determined. Then, within a plane containing the normal direction of the light-absorbing anisotropic film along that azimuth angle (a plane containing the transmittance central axis and orthogonal to the film surface), the polar angles relative to the normal direction of the light-absorbing anisotropic film surface were changed in 1° increments from -70° to 70°. Simultaneously, the Mueller matrix at a wavelength of 550 nm was measured, and the transmittance of the light-absorbing anisotropic film was derived. The direction with the highest transmittance was then designated as the transmittance central axis.

[0362] In addition, the transmittance center axis represents the direction of the absorption axis (long axis direction of the molecule) of the dichroic substance contained in the light absorption anisotropic film.

[0363] The transmittance center axis angle θ can be set to the desired value by adjusting the type and content of the orientation agent, for example.

[0364] [Layered Body] The laminate of the present invention has a light-absorbing anisotropic film, which can be disposed on a substrate. Furthermore, when the laminate of the present invention has a substrate, an alignment film can be provided between the substrate and the light-absorbing anisotropic film.

[0365] The components constituting the laminate of the present invention will be described below.

[0366] [Substrate] As a substrate, a transparent support is preferred. Furthermore, a transparent support refers to a support with a visible light transmittance of 60% or more, preferably 80% or more, and more preferably 90% or more.

[0367] As a transparent support, known transparent resin films, transparent resin sheets, transparent resin plates, etc. can be used, but there are no particular limitations.

[0368] As transparent resin films, cellulose acylated films (e.g., cellulose triacetate film (refractive index 1.48), cellulose diacetate film, cellulose acetate butyrate film, cellulose acetate propionate film), polyethylene terephthalate film, polyethersulfone film, polyacrylic resin film, polyurethane resin film, polyester film, polycarbonate film, polysulfone film, polyether film, polymethylpentene film, polyetherketone film, (meth)acrylonitrile film, etc. can be used.

[0369] Preferably, the cellulose acylate film is a protective film with high transparency, low optical birefringence, easy manufacturing and commonly used as a polarizer, and more preferably, a cellulose triacetate film.

[0370] The thickness of the substrate is typically 20–100 μm.

[0371] In this invention, it is particularly preferred that the substrate is a cellulose ester membrane with a thickness of 20 to 70 μm.

[0372] [Anisotropic light absorption film] Regarding the light-absorbing anisotropic film of the present invention, as described above, its description is therefore omitted.

[0373] [Orientation film] Regarding the alignment film (alignment layer), as mentioned above, its description is omitted.

[0374] [λ / 4 board] One preferred embodiment of the laminate of the present invention is a laminate comprising an anisotropic light-absorbing film (in particular, an anisotropic light-absorbing film with a transmittance central axis angle θ exceeding 45° and below 90°) and a λ / 4 plate. Such a laminate (optical film) can be suitably used as a circular polarizer.

[0375] A λ / 4 plate refers to a plate with λ / 4 functionality. Specifically, it refers to a plate that has the function of converting linearly polarized light of a specific wavelength into circularly polarized light (or converting circularly polarized light into linearly polarized light).

[0376] For example, as a single-layer structure of the λ / 4 plate, examples include a stretched polymer film or a phase difference film with an anisotropic light-absorbing film having a λ / 4 function disposed on a support. As a multi-layer structure of the λ / 4 plate, examples include a broadband λ / 4 plate formed by stacking λ / 4 plates and λ / 2 plates.

[0377] The λ / 4 plate and the anisotropic light-absorbing film can be in contact, or other layers can be disposed between the λ / 4 plate and the anisotropic light-absorbing film. Examples of such layers include adhesive layers or bonding layers and barrier layers for ensuring airtightness.

[0378] [Polarizer] As another preferred embodiment of the laminate of the present invention, an embodiment having anisotropic light absorption film (in particular, anisotropic light absorption film with a transmittance central axis angle θ of 0° or more and 45° or less) and a polarizer having an absorption axis in the plane can be cited. Such a laminate (optical film) can be suitably used as a viewing angle control film for controlling the viewing angle.

[0379] The polarizer is preferably disposed on the side of the light-absorbing anisotropic film opposite to the substrate. The polarizer can be disposed on the surface of the light-absorbing anisotropic film in contact with it, or it can be disposed on the surface of the light-absorbing anisotropic film through other layers (e.g., known adhesive layers or bonding layers).

[0380] A polarizer is not particularly limited as long as it is a component with an absorption axis in plane and the function of converting light into linearly polarized light. Conventionally known polarizers can be used. Iodine-based polarizers, dye-based polarizers utilizing dichroic dyes, and polyene-based polarizers can be used. Iodine-based and dye-based polarizers include coated polarizers and stretched polarizers, both of which are applicable.

[0381] As a polarizer, a polarizer that orients dichroic organic pigments by utilizing the orientation of liquid crystal compounds is preferred. As a stretching polarizer, a polarizer made by adsorbing iodine or dichroic dyes onto polyvinyl alcohol and then stretching it is preferred.

[0382] For example, the light absorption anisotropic film described in Japanese Patent Application Publication No. 2010-152351, which does not contain a liquid crystal compound but contains a dichroic pigment compound with horizontal orientation (the direction intersecting the thickness direction of the light absorption anisotropic film), and the light absorption anisotropic film described in International Publication No. 2017 / 154907, which contains a liquid crystal compound and a dichroic pigment compound with horizontal orientation, can be cited.

[0383] [Blocking layer] The laminate of the present invention preferably has a blocking layer together with the light-absorbing anisotropic film.

[0384] Here, the barrier layer is also called the gas barrier layer (oxygen barrier layer), which has the function of protecting the polarization element of the present invention from gases such as oxygen in the atmosphere, moisture or compounds contained in adjacent layers.

[0385] For the sake of further improving durability, the laminate of the present invention preferably has an oxygen permeability coefficient of 200 cc / m in the adjacent layers of the light-absorbing anisotropic film. 2 For barrier layers with a day-atm or less, a permeability coefficient of 50 cc / m is more preferable. 2 A barrier layer below day·atm.

[0386] Furthermore, on adjacent layers of the anisotropic light-absorbing film, besides the aforementioned barrier layer, if an oxygen permeability coefficient of 200 cc / m exists... 2 For layers below day·atm, a blocking layer is not required.

[0387] Here, the oxygen permeability coefficient refers to an index that represents the amount of oxygen passing through the membrane per unit time and per unit area. In this invention, the value is obtained by measuring the oxygen concentration using an oxygen concentration device (e.g., a MODEL3600 manufactured by Hach UltraAnalytics, Inc.) under an environment of 25°C and 50% relative humidity (RH).

[0388] From the perspective of high oxygen barrier function, organic compounds included in the barrier layer can be categorized as polymeric compounds with high hydrogen bonding and compounds with a large number of polymeric groups per unit molecular weight. Examples of compounds with a large number of polymeric groups per unit molecular weight include pentaerythritol tetra(meth)acrylate or dipentaerythritol hexa(meth)acrylate.

[0389] Examples of polymerizable compounds with high hydrogen bonding include epoxides, and more specifically, compounds represented by the following formulas, among which 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate represented by the following formula CEL2021P is preferred.

[0390] [Chemical Formula 25] From the viewpoint of preventing the diffusion of dichroic pigments in the anisotropic light-absorbing layer during durability, polymers with hydrophilic groups as described in International Publication No. 2019-22121

[0056] and water-soluble polymers as described in Japanese Patent Application Publication No. 2017-083843

[0117] to

[0133] are preferred as a barrier layer. In addition, reference can be made to paragraphs

[0014] to

[0054] of Japanese Patent Application Publication No. 2014-159124, paragraphs

[0042] to

[0075] of Japanese Patent Application Publication No. 2017-121721, paragraphs

[0045] to

[0054] of Japanese Patent Application Publication No. 2017-115076, paragraphs

[0010] to

[0061] of Japanese Patent Application Publication No. 2012-213938, and paragraphs

[0021] to

[0031] of Japanese Patent Application Publication No. 2005-169994.

[0391] [Adhesive layer] The laminate of the present invention may or may not have an adhesive layer.

[0392] Adhesives and adhesives can be cited as examples of adhesives that form the adhesive layer.

[0393] Examples of adhesives include rubber-based adhesives, acrylic adhesives, silicone adhesives, urethane adhesives, vinyl alkyl ether adhesives, polyvinyl alcohol adhesives, polyvinylpyrrolidone adhesives, polyacrylamide adhesives, and cellulose adhesives, with acrylic adhesives (pressure-sensitive adhesives) being preferred.

[0394] Examples of adhesives include polyvinyl alcohol adhesives (water-based paste), solvent-based adhesives, emulsion-based adhesives, solvent-free adhesives, active energy radiation-cured adhesives, and thermosetting adhesives. Examples of active energy radiation-cured adhesives include electron beam-cured adhesives, ultraviolet-cured adhesives, and visible light-cured adhesives, with ultraviolet-cured adhesives being preferred.

[0395] There is no particular limitation on the thickness of the adhesive layer, but from the viewpoint of thinness, it is preferable to be 25 μm or less, more preferably 15 μm or less, and even more preferably 5 μm or less. There is no particular limitation on the lower limit, and it is more common to find thicknesses of 0.1 μm or more.

[0396] From the perspective of simplification and thinning, it is also preferable to design a structure in which the light absorption anisotropic layer and the adhesive layer are adjacent without a barrier layer, by providing the adhesive layer with a barrier layer to improve durability. For example, a structure in which the alignment layer / light absorption anisotropic layer / adhesive layer / phase retardation layer are arranged adjacently can be cited.

[0397] As the adhesive layer at this time, from the viewpoint of preventing the diffusion of dichroic substances in the anisotropic light absorption layer during durability, adhesives with polyvinyl alcohol as the main component, UV (ultraviolet) adhesives with low oxygen permeability, and adhesives with polymers containing hydrophilic groups are preferred.

[0398] [Reflective linear polarizer] The image display device of the present invention can include a reflective linear polarizer. The reflective linear polarizer reflects a portion of the light emitted from the image display panel and causes it to oscillate within the optical system. From the viewpoint of suppressing stray light and ghosting, the reflective linear polarizer is preferably a polarizer with a high degree of polarization.

[0399] As a reflective linear polarizer, thin-film and wire grid polarizers made by stretching dielectric multilayer films, as described in Japanese Patent Application Publication No. 2011-053705, can be used. As commercially available products, reflective polarizers (trade names APF, IQPE) manufactured by 3M Company and wire grid polarizers (trade name WGF) manufactured by Asahi Kasei Corporation can be used appropriately.

[0400] [Image display device] The display device (image display device) of the present invention includes the above-described light-absorbing anisotropic film (preferably the above-described laminate) and a display element.

[0401] The light-absorbing anisotropic film and the liquid crystal cell can be stacked apart by a known adhesive layer or bonding layer.

[0402] The display element used in the display device of the present invention is not particularly limited, and examples include liquid crystal cells, organic electroluminescent (hereinafter referred to as "EL") display panels and plasma display panels.

[0403] Preferably, a liquid crystal cell or an organic EL display panel is used. That is, as the display device of the present invention, a liquid crystal display device that uses a liquid crystal cell as a display element or an organic EL display device that uses an organic EL display panel as a display element is preferred.

[0404] Image display devices include thin ones that can be molded into curved surfaces. The light-absorbing anisotropic film used in this invention is thin and easily bent, and therefore can also be appropriately applied to image display devices with curved display surfaces.

[0405] Furthermore, there are image display devices with pixel densities exceeding 250 ppi that can achieve high-definition display. The light-absorbing anisotropic film used in this invention can also be appropriately applied to such high-definition image display devices without producing ripples.

[0406] [Liquid Crystal Display Device] As an example of the display device of the present invention, a liquid crystal display device is preferably provided that has the above-described viewing angle control film and liquid crystal cell.

[0407] As a specific structure, there are structures in which the viewing angle control film is disposed on the front polarizer or the rear polarizer. In these structures, viewing angle control is possible by blocking light in the vertical or horizontal directions.

[0408] Furthermore, viewing angle control films can be configured on both the front and rear polarizers. With this structure, viewing angle control can be achieved, allowing light to be blocked from all directions and transmitted only from the front direction.

[0409] Furthermore, multiple viewing angle control films can be stacked with a phase retardation layer between them. By controlling the phase difference value and the optical axis direction, transmission performance and light-blocking performance can be controlled. For example, by configuring the film as a polarizer, a viewing angle control film, a λ / 2 waveplate (an angle whose axis is offset by 45° relative to the orientation direction of the polarizer), and a viewing angle control film, viewing angle control can be achieved, allowing light to be blocked from all directions and transmitted only in the front direction. As the phase retardation layer, positive A-plate, negative A-plate, positive C-plate, negative C-plate, B-plate, O-plate, etc., can be used. From the viewpoint of making the viewing angle control system thinner, the thickness of the phase retardation layer is preferably thinner without compromising optical properties, mechanical properties, and manufacturing applicability. Specifically, it is preferably 1 to 150 μm, more preferably 1 to 70 μm, and even more preferably 1 to 30 μm.

[0410] The liquid crystal unit that constitutes a liquid crystal display device will be described in detail below.

[0411] <Liquid Crystal Unit> The liquid crystal cells used in the liquid crystal display device are preferably in VA (Vertical Alignment) mode, OCB (Optically Compensated Bend) mode, IPS (In-Plane-Switching) mode or TN (Twisted Nematic) mode, but are not limited to these.

[0412] In TN mode liquid crystal cells, when no voltage is applied, the rod-shaped liquid crystal molecules are substantially horizontally oriented, and then twisted at 60-120°. TN mode liquid crystal cells are most commonly used in color TFT liquid crystal display devices, and are documented in several publications.

[0413] In a VA-mode liquid crystal cell, the rod-shaped liquid crystal molecules are substantially vertically oriented when no voltage is applied. In addition to (1) a narrow VA-mode liquid crystal cell in which the rod-shaped liquid crystal molecules are substantially vertically oriented when no voltage is applied and substantially horizontally oriented when a voltage is applied (described in Japanese Patent Application Publication No. 2-176625), the VA-mode liquid crystal cell also includes: (2) a liquid crystal cell in which the VA mode is multi-domained (MVA mode) to expand the viewing angle (described in SID 97, Digest oftech. Papers 28 (1997) 845); (3) a liquid crystal cell in which the rod-shaped liquid crystal molecules are substantially vertically oriented when no voltage is applied and twisted into multi-domain orientation when a voltage is applied (n-ASM mode) (described in the proceedings of the Japan Liquid Crystal Conference 58-59 (1998)); and (4) a SURVIVAL mode liquid crystal cell (published at LCD International 98). Furthermore, it can be any of the following: PVA (Patterned Vertical Alignment), Optical Alignment, and PSA (Polymer-Sustained Alignment). Detailed information about these modes can be found in Japanese Patent Application Publication Nos. 2006-215326 and 2008-538819.

[0414] In IPS-mode liquid crystal cells, the liquid crystal compound is substantially parallel to the substrate, and the liquid crystal molecules respond planarly by applying an electric field parallel to the substrate surface. That is, in the state where no electric field is applied, the liquid crystal compound is in-plane aligned. In the IPS mode, a black display is achieved without an applied electric field, and the absorption axes of the upper and lower polarizers are orthogonal. Japanese Patent Application Publications Nos. 10-54982, 11-202323, 9-292522, 11-133408, 11-305217, and 10-307291 disclose methods for using optical compensation sheets to reduce light leakage during black display in the tilt direction to improve viewing angle.

[0415] [Organic EL display device] As an example of the display device of the present invention, an organic EL display device may be suitably provided, for example, with the aforementioned circular polarizer and organic EL display panel arranged sequentially from the visual recognition side. In this case, a substrate, a light-absorbing anisotropic film, and a λ / 4 plate are arranged sequentially from the visual recognition side.

[0416] Furthermore, an organic EL display panel is a display panel made of organic EL elements formed by sandwiching an organic light-emitting layer (organic electroluminescent layer) between electrodes (between the cathode and the anode). There are no particular restrictions on the structure of an organic EL display panel, and a known structure can be used.

[0417] Virtual reality display device A first embodiment of a virtual reality display device, as an example of the display device of the present invention, is a virtual reality display device having, in sequence, an image display panel, a first absorptive linear polarizer (light-absorbing anisotropic layer), a first phase difference layer, a second phase difference layer, a reflective linear polarizer, a third phase difference layer, a semi-transparent reflector, and a second absorptive linear polarizer (light-absorbing anisotropic film).

[0418] As a second approach, a virtual reality display device is provided, in sequence, an image display panel, a first absorptive linear polarizer, a first phase difference layer, a semi-transparent mirror, a reflective circular polarizer, a second phase difference layer, and a second absorptive linear polarizer.

[0419] As a third approach, a virtual reality display device is provided, in sequence, an image display panel, a first absorptive linear polarizer, a first phase difference layer, a semi-transparent reflector, a second phase difference layer, a reflective linear polarizer, and a second absorptive linear polarizer.

[0420] Furthermore, it is also preferable to have a fourth phase difference layer on the visual recognition side of the second absorption-type linear polarizer.

[0421] In the virtual reality display device of the present invention, as a substrate (e.g., Figure 1 The component between the second phase difference layer 12 and the semi-transparent reflector 40 can use a curved substrate in the shape of a lens.

[0422] At this point, the light-absorbing anisotropic layer or laminate of the present invention can be processed into a three-dimensional curved surface for use.

[0423] Figure 1 This is a side view schematically illustrating one embodiment of the virtual reality display device of the present invention. Figure 1 The virtual reality display device 100 is configured from the visual recognition side as follows: a second absorptive linear polarizer 22, a second phase difference layer 12, a semi-transparent reflector 40, an anti-reflection layer 50, a reflective circular polarizer 30, a positive C-plate 60, a first phase difference layer 11, a first absorptive linear polarizer 21, a third phase difference layer 13, and an image display panel 70.

[0424] [Specific polymers] The present invention also relates to the following specific polymers.

[0425] The specific polymer of the present invention is a polymer having at least one of repeating unit A-1 represented by formula (A-1), repeating unit B represented by formula (B), and repeating unit D represented by formula (D).

[0426] The repeating units A-1, B, and D in the specific polymer of the present invention are as described in the specific polymer contained in the liquid crystal composition of the present invention, and therefore their description is omitted.

[0427] Example The present invention will now be described in further detail with reference to embodiments. The materials, amounts, proportions, processing contents, and processing steps shown in the following embodiments can be appropriately modified without departing from the spirit of the invention. Therefore, the scope of the present invention should not be limited by the embodiments shown below.

[0428] [Synthesis example 1] Copolymer B1 was synthesized through the following steps.

[0429] [Chemical Formula 26] 5.3 g of methyl ethyl ketone (MEK) was added to a reaction vessel and heated to an internal temperature of 80°C under a nitrogen atmosphere. After 3 hours, a mixed solution of 9.75 g of 4-acryloylmorpholine (manufactured by Tokyo Chemical Industry Co., Ltd.), 5.25 g of monomer K-1 (manufactured by SILAPLANE TM-0701T JNC Corporation), 0.5 g of dimethyl 2,2'-azobis(2-methylpropionic acid) (trade name "V-601", manufactured by FUJIFILM Wako Pure Chemical Corporation), and 15.0 g of methyl ethyl ketone was added dropwise, and the mixture was allowed to polymerize at 80°C. After the addition was complete, a solution of 0.10 g of dimethyl 2,2'-azobis(2-methylpropionic acid) in 1.0 g of methyl ethyl ketone was added, and the mixture was stirred at 80°C for 5 hours to obtain a methyl ethyl ketone solution of copolymer B1.

[0430] The obtained copolymer B1 was analyzed by gel permeation chromatography (GPC), and the weight-average molecular weight (Mw) was 18,000 (converted from polystyrene).

[0431] In addition, the above weight-average molecular weight (Mw) was calculated using gel permeation chromatography (EcoSEC HLC-8320GPC (manufactured by TOSOH CORPORATION)) with tetrahydrofuran as the eluent, and under the conditions of a flow rate of 0.35 mL / min and a temperature of 40 °C, converted to polystyrene. The columns used were TSKgel SuperHZM-H, TSKgel SuperHZ4000, and TSKgel SuperHZ200 (manufactured by TOSOH CORPORATION).

[0432] In addition, the Mw of each copolymer described later was also determined using the same method as that of copolymer B1.

[0433] [Synthesis Examples 2 to 6] By changing the monomers and composition ratios used in Synthesis Example 1 to the monomers and composition ratios that form repeating units of the copolymers, copolymers B2 to B5 and B'3, as described later, were obtained by the same method as in Synthesis Example 1.

[0434] [Synthesis Example 7] Copolymer B6 was synthesized through the following steps.

[0435] [Chemical Formula 27] Specifically, 6g of compound D-1, 4g of monomer K-1 (manufactured by SILAPLANE TM-0701T JNC Corporation), and 30mg of dimethyl 2,2'-azobis(2-methacrylate) dimethyl ester (trade name "V-601", manufactured by FUJIFILM Wako Pure Chemical Corporation) were dissolved in 18g of dimethylacetamide (DMAc), and this solution was added dropwise over 3 hours to 8g of dimethylacetamide heated to 80°C under a nitrogen atmosphere. After the addition was complete, the mixture was heated at 80°C for 4 hours.

[0436] Next, through 1 After confirming the disappearance of polymeric groups by H-NMR (Nuclear Magnetic Resonance) spectroscopy, the reaction solution was added to 250 mL of distilled water and filtered. The residue was washed with distilled water and hexane, thus yielding 7.1 g of copolymer B6 as a white solid.

[0437] The weight-average molecular weight (Mw) of the obtained copolymer B6 is 14,000.

[0438] The compound D-1 used in the synthesis was synthesized according to the following scheme.

[0439] [Chemical Formula 28] Specifically, 22g of methanesulfonyl chloride (MsCl) was added to 48.5mL of tetrahydrofuran (THF), and the mixture was cooled to an internal temperature of 0°C.

[0440] A solution containing 48.5 g of compound (a1), 0.36 g of 2,2,6,6-tetramethylpiperidine-1-oxy (TEMPO), and 28 g of diisopropylethylamine (DIPEA) pre-dissolved in 26 ml of a mixed solvent of THF and dimethylacetamide in a mass ratio of 33:67 was added dropwise, ensuring the internal temperature did not rise above 10°C. After stirring at 0°C for 30 minutes, 38 ml of a dimethylacetamide solution containing 25 g of acetaminophen was added. Then, 6.85 g of N-methylimidazole and 20 g of triethylamine were added, and the mixture was stirred at 0°C for 60 minutes before being heated to room temperature. Next, 30 ml of distilled water and 30 ml of dimethylacetamide were added, and the mixture was heated to 40°C and stirred until the solid was completely dissolved. Finally, 300 ml of methanol was gradually added to the contents of the flask, and the mixture was stirred while cooling to an internal temperature of 5°C to allow the reactants to precipitate again. The precipitate was filtered, and the residue was washed with distilled water and hexane, yielding 58 g of compound D-1 as a white solid.

[0441] The following shows the obtained compound D-1 1 H-NMR.

[0442] 1 H-NMR (solvent: CDCl3) δ (ppm): 1.92 (br, 4H), 2.16 (t, 3H), 4.09 (t, 2H), 4.26 (t, 2H), 5.84 (dd, 1H ), 6.13 (q, 1H), 6.62 (dd, 1H), 6.96 (2H), 7.12 (m, 2H), 7.51 (m, 2H), 7.84 (br, 1H), 8.13 (m, 2H) [Synthesis Examples 8 to 13] By changing the monomers and composition ratios used in Synthesis Example 6 to the monomers and composition ratios that form repeating units of the copolymer, copolymers B7 to B11 and B'2, as described later, were obtained by the same method as in Synthesis Example 7.

[0443] [Synthesis Example 14] Copolymer B12 was synthesized through the following steps.

[0444] [Chemical Formula 29] 16.0 g of cyclohexanone / isopropanol (mass ratio 8 / 2) was placed in a 200 mL three-necked flask equipped with a stirrer, cooling tube, nitrogen inlet tube, and thermometer. The internal temperature was set to 80 °C and purged with nitrogen. After 3 hours, a solution was prepared by dropwise addition of various components, including 31.5 g of monomer K-1 (SILAPLANE TM-0701T, manufactured by JNC Corporation), 4.4 g of monomer D-2, 2.1 g of acrylic acid (manufactured by FUJIFILM Wako Pure Chemical Corporation), 1.1 g of 1,3-propanediol (manufactured by FUJIFILM Wako Pure Chemical Corporation), 0.6 g of dimethyl 2,2'-azobis(2-methacrylate) (trade name "V-601", manufactured by FUJIFILM Wako Pure Chemical Corporation), and 72.2 g of cyclohexanone / isopropanol (mass ratio 8 / 2). Subsequently, a mixed solution of 0.5 g of 2,2'-azobis(2-methacrylate) dimethyl ester and 7.3 g of cyclohexanone / isopropanol = 8 / 2 (mass ratio) was added, and the mixture was stirred at an internal temperature of 80°C for 5 hours. Then, 4.1 g of glycidyl methacrylate (manufactured by FUJIFILM Wako Pure Chemical Corporation), 1.5 g of tetrabutylammonium bromide (manufactured by FUJIFILM Wako Pure Chemical Corporation), 0.1 g of hydroquinone monomethyl ether (manufactured by FUJIFILM Wako Pure Chemical Corporation), and 16.8 g of cyclohexanone / isopropanol = 8 / 2 (weight ratio) were added, and the mixture was reacted at an internal temperature of 85°C for 8 hours to obtain copolymer B12.

[0445] The weight-average molecular weight (Mw) of copolymer B12 is 15,000.

[0446] [Synthesis Examples 15-16] By changing the monomers and composition ratios used in Synthesis Example 7 to the monomers and composition ratios used to form the repeating units of each copolymer, copolymers B13 and B14 were obtained by the same method as in Synthesis Example 7.

[0447] The structures of copolymers B1 to B14 and B'2 to B'3 are shown below. Furthermore, the values ​​indicated on each repeating unit represent the content (mass%) of each repeating unit relative to all repeating units (100% by mass) present in the copolymer.

[0448] Furthermore, in the following formula, TMS represents trimethylsilyl and nBu represents n-butyl.

[0449] [Chemical Formula 30] [Chemical Formula 31] [Chemical Formula 32] [Chemical Formula 33] [Example 1-1] [Preparation of cellulose acylated membrane 1] <Preparation of Core Cellulose Acidide Doping Solution> The following composition was added to a mixing tank and stirred to dissolve the components, thereby preparing a cellulose acetate solution for use as a core layer cellulose acylate doping solution.

[0450] ----------------------------------------------------------- Core layer cellulose acylate doped solution ----------------------------------------------------------- 100 parts by weight of cellulose acetate with a degree of acetyl substitution of 2.88 • Examples of Japanese Patent Application Publication No. 2015-227955 The recorded polyester compound B, 12 parts by mass • 2 parts by mass of the following compound F • Dichloromethane (primary solvent) 430 parts by weight • Methanol (second solvent) 64 parts by weight ------------------------------------------------------------ [Chemical Formula 34] <Preparation of outer cellulose acylate doped solution> A cellulose acetate solution for use as an outer cellulose acylate doping solution was prepared by adding 10 parts by mass of the following matting agent solution to 90 parts by mass of the core cellulose acylate doping solution.

[0451] ------------------------------------------------------------ Matting solution ------------------------------------------------------------ • Silica particles with an average particle size of 20 nm (AEROSIL R972, manufactured by NIPPON AEROSIL CO.,LTD.) 2 parts by weight • Dichloromethane (primary solvent) 76 parts by mass • Methanol (second solvent) 11 parts by weight · 1 part by mass of the above-mentioned core layer cellulose acylate doped solution ------------------------------------------------------------ <Preparation of Cellulose Acylate Membrane 1> After filtering the core cellulose acylate doped liquid and the outer cellulose acylate doped liquid with filter paper with an average pore size of 34 μm and a sintered metal filter with an average pore size of 10 μm, the three layers of the core cellulose acylate doped liquid and the outer cellulose acylate doped liquid on both sides are simultaneously cast from the casting port onto a roller at 20°C (ring casting machine).

[0452] Next, the film was peeled off with a solvent content of approximately 20% by mass, and the two ends of the film in the width direction were fixed by a tenter frame clamp. The film was then dried while being stretched in the transverse direction at a stretch ratio of 1.1.

[0453] The film is then further dried by conveying it between rollers in a heat treatment apparatus to produce an optical film with a thickness of 40 μm, which serves as cellulose acylate film 1 (support 1). The obtained cellulose acylate film 1 has an in-plane retardation of 0 nm.

[0454] [Fabrication of photoalignment layer PA1] The oriented layer forming coating solution PA1 (described later) was continuously coated onto the cellulose acylated membrane 1 using a wire rod. The support with the coating was dried with warm air at 140°C for 120 seconds, followed by polarized ultraviolet irradiation (10 mJ / cm²). 2 A photo-alignment layer PA1 was formed using an ultra-high pressure mercury lamp, thus obtaining a TAC film with a photo-alignment layer. The thickness of the photo-alignment layer PA1 was 0.5 μm.

[0455] -------------------------------------------------- (Coating liquid PA1 for forming orientation layer) ---------------------------------------------------- The following polymer PA1 100.00 parts by weight The following acid-producing agent PAG-1, 8.00 parts by weight The following acid-producing agent, CPI-110TF, is used in 0.005 parts by weight. 1220.00 parts by weight of xylene 122.00 parts by weight of methyl isobutyl ketone ------------------------------------------------------ [Chemical Formula 35] [Chemical Formula 36] [Chemical Formula 37] [Fabrication of the light-absorbing anisotropic film 1-1] The following liquid crystal composition 1-1 is continuously coated onto the obtained photoalignment layer PA1 using a wire rod, thereby forming a coating layer.

[0456] Next, the coating layer was heated at 140°C for 30 seconds and then cooled to room temperature (23°C). Then, it was heated at 90°C for 60 seconds and then cooled to room temperature again.

[0457] Then, LED (Light Emitting Diode) lamps (center wavelength 365nm) were used at an illuminance of 200mW / cm². 2 Irradiation for 2 seconds under the specified irradiation conditions resulted in the fabrication of anisotropic light-absorbing film 1-1 on the light-alignment layer PA1.

[0458] Thus, a laminate 1-1 was obtained in which an anisotropic light-absorbing film 1-1 is formed on the light-alignment layer PA1 of the TAC film with the light-alignment layer. In addition, the thickness of the anisotropic light-absorbing film 1 is 0.5 μm.

[0459] --------------------------------------------------------- Composition of liquid crystal composition 1-1 ---------------------------------------------------------- • 2.23 parts by mass of the following polymeric liquid crystal compound P1 • 0.95 parts by weight of the following low molecular weight liquid crystal compound L1 • 0.09 parts by mass of the following dichroic substance Y1 • 0.20 parts by mass of the following dichroic substance M1 • 0.41 parts by mass of the following dichroic substance C1 • Polymerization initiator I1 (IRGACUREOXE-02, manufactured by BASF) 0.14 parts by weight • 0.027 parts by weight of the above copolymer B1 · Cyclopentanone 53.90 parts by weight ·Tetrahydrofuran 23.10 parts by weight ----------------------------------------------------------- [Chemical Formula 38] In addition, both the high molecular weight liquid crystal compound P1 and the low molecular weight liquid crystal compound L1 are rod-shaped liquid crystal compounds.

[0460] [Examples 1-2 to 1-13, Comparative Examples 1-1 to 1-3] The composition of liquid crystal composition 1-1 was changed to the composition shown in Table 1 below. Otherwise, in the same manner as in Example 1-1, each laminate of Examples 1-2 to 1-13 and Comparative Examples 1-1 to 1-3 was obtained.

[0461] [Examples 1-14, 1-15] The composition of liquid crystal composition 1-1 was changed to the composition shown in Table 1 below. Otherwise, the laminates of Examples 1-14 and 1-15 were obtained in the same manner as in Example 1-1.

[0462] The following is a summary of the components represented by symbols in Table 1, excluding those already shown. Additionally, the numerical values ​​in parentheses for each repeating unit indicate the content (mass %) of each repeating unit relative to all repeating units present in each polymer.

[0463] In addition, both the high molecular weight liquid crystal compounds P2 to P3 and the low molecular weight liquid crystal compounds L2 to L3 are rod-shaped liquid crystal compounds.

[0464] [Chemical Formula 39] [Chemical Formula 40] The low-molecular-weight liquid crystal compound L3 is a mixture of the following rod-shaped liquid crystal compounds. The values ​​in the following formulas represent mass percent, and R represents groups bonded by oxygen atoms.

[0465] [Chemical Formula 41] [Chemical Formula 42] Polymer B'1: Polyether-modified silicone (manufactured by Evonik Tego chemie, trade name "FLOW 425") [evaluate] [Haze] With a linear polarizer inserted into the light source side of an optical microscope (manufactured by Nikon Corporation, product name "ECLIPSE E600 POL"), the laminates of the examples and comparative examples were placed on the sample stage, and the haze was evaluated visually. It can be said that the better the haze evaluation, the more orientation defects are suppressed. The results are shown in Table 1.

[0466] A: No haze was visually detected on the entire surface.

[0467] B: Fog can be slightly visually discerned in certain areas.

[0468] C: The entire surface appears cloudy.

[0469] [Depression] The laminate was observed by holding it between two polarizers arranged in orthogonal Nicol plates and rotating it in the horizontal plane to confirm its brightness and darkness. Regarding the anisotropic light absorption film in the laminate, the presence or absence of coating depressions was confirmed based on the brightness and darkness. The results are shown in Table 1. Furthermore, values ​​above C are within acceptable limits.

[0470] A: The dent is not visible to the naked eye overall. B: Indentations were observed to the naked eye in some areas. C: Depressions are visible to the naked eye in the broad section. D: The overall appearance is visibly concave. [Orientation Degree] With a linear polarizer inserted on the light source side of an optical microscope (Nikon Corporation, product name "ECLIPSE E600 POL"), the laminates of the examples and comparative examples were placed on the sample stage. Using a multi-channel spectrometer (Ocean Optics, product name "QE65000"), the absorbance of the anisotropic films in the wavelength region of 380 nm to 780 nm was measured at 1 nm intervals. The orientation degree in the range of 400 nm to 700 nm was calculated using the following formula. Based on the obtained orientation degree, the orientation degree was evaluated according to the following evaluation criteria. The results are shown in Table 1.

[0471] Orientation degree: S = ((Az0 / Ay0) - 1) / ((Az0 / Ay0) + 2) In the above formula, "Az0" represents the absorbance of the light-absorbing anisotropic film for polarized light along the absorption axis, and "Ay0" represents the absorbance of the light-absorbing anisotropic film for polarized light along the transmission axis.

[0472] A: Orientation degree is 0.95 or higher. B: Orientation degree is 0.88 or higher and less than 0.95. C: Orientation degree less than 0.88 In addition, the layer structures of the laminate, except for the light-absorbing anisotropic film, do not have absorption in the range of 400 to 700 nm. Therefore, the orientation degree calculated above can be referred to as the value of the light-absorbing anisotropic film of the laminate.

[0473] [Transmittance center axis angle θ] Using the laminates of the examples and comparative examples, the transmittance central axis angle θ was measured by the method described above. As a result, the transmittance central axis angle θ of the laminates of the examples and comparative examples were all in the range of 80 to 90°.

[0474] Furthermore, the laminated structure, except for the light-absorbing anisotropic film, does not have anisotropic absorption. Therefore, the transmittance central axis angle θ calculated above can be referred to as the value of the light-absorbing anisotropic film in the laminated structure.

[0475] [Table 1]

[0476] In Table 1, "mass ratio relative to dichroic substance" refers to the mass ratio of the copolymer content to the dichroic substance content in the liquid crystal composition (copolymer content / dichroic substance content).

[0477] As shown in Table 1, it is demonstrated that when a liquid crystal composition containing a specific polymer is used, depressions are suppressed during the formation of anisotropic light absorption films, and anisotropic light absorption films in which the generation of orientation defects is suppressed can be formed (Examples 1-1 to 1-15).

[0478] The comparison of Examples 1-1 and 1-2 with Examples 1-5 shows that, when using a specific polymer having repeating unit B, orientation defects (haze) can be further suppressed, and an anisotropic film with excellent orientation can be formed.

[0479] The comparison of Examples 1-6 and 1-7 with Examples 1-5 shows that, when using a specific polymer having repeating unit D, it is possible to further suppress depressions and orientation defects (haze), and to form an anisotropic film with excellent orientation.

[0480] A comparison of Examples 1-8 and Examples 1-9 shows that, in the repeating unit B, the equivalent of R... B4 and R B5 When the total molecular weight of the groups is less than 100, it is possible to further suppress orientation defects (haze) and form an anisotropic film with excellent orientation.

[0481] A comparison of Examples 1-8 and Examples 1-11 shows that if the content of repeating unit D is 20% by mass or more relative to the total mass of a particular polymer, the indentation can be further suppressed.

[0482] The comparison between Examples 1-8 and Examples 1-12 shows that, when using a polymeric liquid crystal compound, orientation defects (haze) can be further suppressed, and an anisotropic light absorption film with excellent orientation can be formed.

[0483] In contrast, if a liquid crystal composition that does not contain a specific polymer is used, the depression cannot be sufficiently suppressed when forming anisotropic light absorption films, and the orientation defects of the obtained anisotropic light absorption films cannot be sufficiently suppressed (Comparative Examples 1-1 to 1-3).

[0484] [Example 2-1] [Formation of Orientation Film 2] The following orientation film forming composition 1 is continuously coated onto a cellulose acylate membrane (40 μm thick TAC substrate: TG40, manufactured by FUJIFILM Corporation) using a wire rod. The coated cellulose acylate membrane is then dried with warm air at 140°C for 120 seconds to form an orientation film 2, thereby obtaining a TAC membrane with an orientation film. The thickness of the orientation film 2 is 0.5 μm.

[0485] --------------------------------------------------- (Composition 2 for forming orientation film) --------------------------------------------------- • 100.00 parts by weight of the following polymer PA2 • 8.25 parts by weight of the following acid-producing agent PAG-1 • 0.6 parts by weight of the following stabilizer DIPEA · 250.36 parts by weight of methyl ethyl ketone ·Butyl acetate 1001.42 parts by weight ---------------------------------------------------- [Chemical Formula 43] [Fabrication of the light-absorbing anisotropic film 2-1] The liquid crystal composition 2-1 described below was continuously coated onto the obtained alignment film 2 using a wire rod, and then heated at 120°C for 60 seconds before being cooled to room temperature (23°C).

[0486] Next, heat at 85°C for 60 seconds and then cool to room temperature again.

[0487] Then, using an LED (light emitting diode) lamp (center wavelength 365nm) at an illuminance of 200mW / cm² 2 Irradiation was performed for 2 seconds under the specified irradiation conditions, thereby fabricating an anisotropic light-absorbing film 2-1 on the alignment film 2. The thickness of the anisotropic light-absorbing film 2-1 was 3.5 μm.

[0488] ----------------------------------------------------------- (Liquid crystal composition 2-1) ------------------------------------------------------------ • 6.373 parts by mass of the following polymeric liquid crystal compound P4 • 3.852 parts by mass of the above-mentioned low molecular weight liquid crystal compound L1 • 0.618 parts by mass of the above dichroic substance Y1 • 0.141 parts by mass of the following dichroic substance M3 • 1.531 parts by mass of the following dichroic substance C3 • 0.004 parts by weight of the above copolymer B12 • 0.148 parts by weight of the following orientation agent D1 • 0.148 parts by weight of the following orientation agent D2 • Polymerization initiator (IRGACURE OXE-02, manufactured by BASF) 0.185 parts by weight 87,000 parts by weight of cyclopentanone ----------------------------------------------------------- [Chemical Formula 44] [Chemical Formula 45] [Chemical Formula 46] [Formation of barrier layer B1] A coating film is formed by continuously applying the following barrier layer forming composition B1 onto the obtained light-absorbing anisotropic film 2-1 using a wire rod.

[0489] Next, the support with the coating film is dried with warm air at 60°C for 60 seconds, and then dried with warm air at 100°C for 120 seconds to form a barrier layer B1, which is set as laminate 2-1. The thickness of the barrier layer is 0.5 μm.

[0490] ----------------------------------------------------------- (Composition B1 for forming barrier layer) ----------------------------------------------------------- • 3.80 parts by weight of the following modified polyvinyl alcohol PVA-1 ·IRGACURE2959 0.20 parts by weight 70 parts by weight of water ·Methanol 30 parts by weight ----------------------------------------------------------- [Chemical Formula 47] Using the fabricated laminate 2-1, the transmittance central axis angle θ was measured using the method described above, and the result was 0°. Furthermore, the laminate 2-1, except for the light-absorbing anisotropic film 2-1, does not exhibit anisotropic absorption; therefore, the transmittance central axis angle θ calculated above can be considered the value of the light-absorbing anisotropic film 2-1 within the laminate 2-1.

[0491] [Comparative Example 2-1] By changing copolymer B13 used in liquid crystal composition 2-1 to copolymer B'1 as described above, the laminate of Comparative Example 2-1 was obtained in the same manner as in Example 2-1.

[0492] [evaluate] The haze and depression were evaluated using the laminates of Example 2-1 and Comparative Example 2-1. The results are shown in Table 2.

[0493] [Table 2]

[0494] As shown in Table 2, when a liquid crystal composition containing a specific polymer is used, it is shown that when forming a light absorption anisotropic film, the pitting is suppressed and the generation of orientation defects is suppressed (Example 2-1).

[0495] In contrast, if a liquid crystal composition that does not contain a specific polymer is used, the depression cannot be sufficiently suppressed when forming anisotropic light absorption films, and the orientation defects of the obtained anisotropic light absorption films cannot be sufficiently suppressed (Comparative Example 2-1).

[0496] [Manufacturing of display devices] Display devices 1 and 2 were fabricated using the laminates 1-14 prepared in Examples 1-14 by the method shown below, thereby confirming that the laminates of the present invention fully function as light-absorbing anisotropic films.

[0497] [Fabrication of phase retardation film 1 with positive A plate] The photo-alignment film forming coating solution E1, consisting of the following composition, is continuously coated onto the cellulose acylate film 1 described above using a wire rod. The coated cellulose acylate film 1 is dried with warm air at 140°C for 120 seconds, and then subjected to polarized ultraviolet light irradiation (10 mJ / cm²). 2 Using an ultra-high pressure mercury lamp, a 0.2 μm thick photo-aligned film E1 is formed, thus obtaining a TAC film with a photo-aligned film.

[0498] ---------------------------------------------------- Coating solution E1 for photo-aligned film formation ---------------------------------------------------- • 100.00 parts by weight of the following polymer PA3 • 5.00 parts by weight of the above-mentioned thermal cationic polymerization initiator PAG-1 • 0.005 parts by weight of the following acid-producing agent CPI-110TF 16.50 parts by weight of isopropanol ·Butyl acetate 1072.00 parts by weight · 268.00 parts by weight of methyl ethyl ketone ------------------------------------------------------ Polymer PA3 [In the following formula, the value recorded in each repeating unit represents the content (mass%) of each repeating unit relative to all repeating units. Weight-average molecular weight: 45000] [Chemical Formula 48] Acid-producing agent CPI-110TF [Chemical Formula 49] The composition F1 with the following composition was coated onto the photoalignment film E1 using a bar coater. The coating formed on the photoalignment film E1 was heated to 120°C using warm air, then cooled to 60°C, and then subjected to a high-pressure mercury lamp at a wavelength of 365 nm in a nitrogen atmosphere at a concentration of 100 mJ / cm². 2 The coating was irradiated with ultraviolet light, and then, while being heated to 120°C, 500 mJ / cm² of UV radiation was applied. 2 Ultraviolet light was irradiated onto the coating, thereby fixing the orientation of the liquid crystal compound and creating a phase retardation layer film 1 with a positive A plate F1.

[0499] The thickness of plate A, F1, is 2.5 μm, and Re(550) is 144 nm. Furthermore, plate A satisfies the relationship Re(450) ≤ Re(550) ≤ Re(650). Re(450) / Re(550) is 0.82. The aforementioned plate A is equivalent to a so-called λ / 4 plate.

[0500] --------------------------------------------------------- Composition F1 --------------------------------------------------------- • 43.50 parts by weight of the following polymerizable liquid crystal compound LA-1 • 43.50 parts by weight of the following polymerizable liquid crystal compound LA-2 • 8.00 parts by weight of the following polymerizable liquid crystal compound LA-3 • 5.00 parts by weight of the following polymerizable liquid crystal compound LA-4 • 0.55 parts by weight of the following polymerization initiator PI-1 • 0.20 parts by weight of the following leveling agent T-1 · Cyclopentanone 235.00 parts by weight ---------------------------------------------------------- Polymerizable liquid crystal compound LA-1 (tBu represents tert-butyl) [Chemical Formula 50] Polymerized liquid crystal compound LA-2 [Chemical Formula 51] Polymerized liquid crystal compound LA-3 [Chemical Formula 52] Polymerizable liquid crystal compound LA-4 (Me represents methyl) [Chemical Formula 53] Polymerization initiator PI-1 [Chemical Formula 54] Leveling agent T-1 [In the following formula, the value recorded in each repeating unit represents the content (mass%) of each repeating unit relative to all repeating units. Weight-average molecular weight: 25000] [Chemical Formula 55] [Fabrication of phase retardation layer 2 with positive C-plate] The aforementioned cellulose acylated membrane 1 was used as a pseudo-support.

[0501] After passing the cellulose acylated membrane 1 through a dielectric heating roller at 60°C to raise the surface temperature of the film to 40°C, a bar coater is used to coat one side of the film at a coating amount of 14 ml / m. 2 The alkaline solution with the composition shown below was coated and heated to 110°C, and then conveyed for 10 seconds using a steam-type far-infrared heater manufactured by NORITAKE CO., LIMITED.

[0502] Next, using a rod coater, 3 ml / m of pure water was coated onto the film. 2 Next, after repeating the water washing based on the spray coating machine and the dehydration based on the air knife three times, the film was transported to a drying area at 70°C and dried for 10 seconds, thereby producing an alkali-saponified cellulose acylate film 1.

[0503] ---------------------------------------------------------- (Alkaline solution) ---------------------------------------------------------- 4.7 parts by weight of potassium hydroxide 15.8 parts by weight of water · Isopropanol 63.7 parts by weight Fluorinated surfactant SF-1 (C 14 H 29 O(CH2CH2O) 20 H) 1.0 parts by weight ·Propylene glycol 14.8 parts by weight ----------------------------------------------------------- Using a #8 wire rod, the coating solution G1 for forming an alignment film with the following composition is continuously coated onto the alkali-saponified cellulose acylated film 1. The obtained film is dried with warm air at 60°C for 60 seconds, and then dried with warm air at 100°C for 120 seconds, thereby forming the alignment film G1.

[0504] ----------------------------------------------------------- Coating solution G1 for forming oriented film ------------------------------------------------------------ • Polyvinyl alcohol (manufactured by KURARAY CO.,LTD., PVA103) 2.4 parts by weight 1.6 parts by weight of isopropanol ·Methanol 36 parts by weight · 60 parts by weight of water ------------------------------------------------------------- The following coating solution H1, used for forming a positive C-plate, is applied onto the alignment film G1. The resulting coating is then cured at 60°C for 60 seconds and subjected to air treatment with 70 mW / cm² solution. 2 An air-cooled metal halide lamp (manufactured by EYE GRAPHICS Co., Ltd.) provides 1000 mJ / cm² irradiation. 2 The orientation state of the liquid crystal compound was fixed by ultraviolet light, thereby making the liquid crystal compound vertically oriented, and a phase difference layer film 2 with a positive C plate H1 and a thickness of 0.5 μm was produced.

[0505] The obtained Rth(550) of the positive C plate is -60nm.

[0506] ---------------------------------------------------------- Coating solution H1 for forming positive C-plate ------------------------------------------------------------ ·80 parts by weight of the following liquid crystal compound LC-1 • 20 parts by weight of the following liquid crystal compound LC-2 • 1 part by mass of the following vertically oriented liquid crystal compound S01 Ethylene oxide modified trimethylolpropane triacrylate (V#360, manufactured by OSAKA ORGANIC CHEMICAL INDUSTRY LTD.) 8 parts by weight • IRGACURE 907 (manufactured by BASF) 3 parts by weight • KAYACURE DETX (manufactured by Nippon Kayaku Co., Ltd.) 1 part by weight • 0.4 parts by mass of the following compound B03 170 parts by weight of methyl ethyl ketone · 30 parts by weight of cyclohexanone ------------------------------------------------------------ Liquid crystal compound LC-1 [Chemical Formula 56] Liquid crystal compound LC-2 [Chemical Formula 57] Vertically oriented liquid crystal compound S01 [Chemical Formula 58] Compound B03 [In the following formula, the numerical value of each repeating unit indicates the content (mass%) of each repeating unit relative to all repeating units. Weight-average molecular weight: 15000] [Chemical Formula 59] [Fabrication of Circular Polarizer 1] The phase retardation layer 1 and the laminate 1-14, as described above, are bonded together using an adhesive with the transmissivity central axis of the laminate 1-14 projected onto the surface of the laminate at an angle of 45° to the slow axis of the phase retardation layer 1, and with the light absorption anisotropic film 1-14 side of the laminate 1-14 becoming the positive A-plate F1 side of the phase retardation layer 1. The cellulose acylate film 1 and the photoalignment film E1 on the phase retardation layer 1 side are then peeled off. Furthermore, the bonding surfaces of the phase retardation layer 1 and the laminate 1-14 are subjected to corona treatment, and the following adhesive 1 is used as the adhesive. Next, the positive C-plate side of the obtained phase retardation layer 2 is bonded to the liquid crystal surface exposed by the peeled-off alignment film using an adhesive, and the support and alignment layer are then peeled off. Thus, a circular polarizer 1 composed of a light absorption anisotropic film / adhesive layer / positive A-plate / adhesive layer / positive C-plate is fabricated.

[0507] [Preparation of Adhesive 1] To prepare an aqueous solution with a solid content of 3.7% by mass, 20 parts by mass of hydroxymethyl melamine were dissolved in pure water at 30°C relative to 100 parts by mass of a polyvinyl alcohol resin containing acetylacetyl groups (average degree of polymerization: 1200, degree of saponification: 98.5 mol%, degree of acetylacetylation: 5 mol%).

[0508] [Fabrication of Organic EL Display Device (Display Device 1)] A Samsung Galaxy S5 equipped with an organic EL panel (organic EL display element) was disassembled. The touch panel with a circular polarizer was peeled off from the organic EL display device, and then the circular polarizer was peeled off from the touch panel, separating the organic EL display element, touch panel, and circular polarizer separately. Next, the separately separated touch panel was reattached to the organic EL display element, and then the positive C-plate side of the circular polarizer 1 fabricated above was attached to the touch panel in a manner that prevents air from entering, thereby fabricating the organic EL display device (display device 1).

[0509] [Fabrication of Phase Difference Layer 3] Polymerization was carried out in a batch polymerization apparatus consisting of two longitudinal reactors equipped with stirring blades and a reflux cooler controlled at 100°C. 29.60 parts by mass (0.046 mol) of bis[9-(2-phenoxycarbonylethyl)fluorene-9-yl]methane, 29.21 parts by mass (0.200 mol) of isosorbide (ISB), 42.28 parts by mass (0.139 mol) of spirodiol (SPG), 63.77 parts by mass (0.298 mol) of diphenyl carbonate (DPC), and 1.19 × 10⁻⁶ mol of calcium acetate monohydrate as a catalyst were added. -2 Parts by weight (6.78 × 10) -5(mol). After purging the reactor with nitrogen under reduced pressure, it was heated with a heat medium, and stirring was started when the internal temperature reached 100°C. Forty minutes after the start of heating, the internal temperature reached 220°C, and pressure was reduced while maintaining this temperature, reaching 13.3 kPa within 90 minutes of reaching 220°C. Phenol vapor, a byproduct of the polymerization reaction, was directed to a 100°C reflux cooler, allowing trace amounts of monomer components in the phenol vapor to return to the reactor. Uncondensed phenol vapor was recovered by directing it to a 45°C condenser. After temporarily restoring the pressure to atmospheric pressure by introducing nitrogen into the first reactor, the oligomerized reaction liquid in the first reactor was transferred to the second reactor. Then, heating and depressurization were initiated in the second reactor, reaching an internal temperature of 240°C and a pressure of 0.2 kPa within 50 minutes. Polymerization was then carried out until the specified stirring motive force was reached. When the specified power is reached, nitrogen is introduced into the reactor and repressurized to extrude the generated polyester carbonate resin into the water, cutting the wire rod to obtain granules.

[0510] After vacuum drying the obtained polyester carbonate resin (granules) at 80°C for 5 hours, a strip resin film with a thickness of 130 μm was produced using a film forming apparatus equipped with a single-screw extruder (manufactured by Toshiba Machine Co., Ltd., cylinder set temperature: 250°C), a T-die (width 200 mm, set temperature: 250°C), a cooling roller (set temperature: 120-130°C), and a winding machine. The obtained strip resin film was stretched while being adjusted to obtain a specified phase difference, resulting in a phase difference film 3 with a thickness of 48 μm. The stretching conditions in the width direction were a stretching temperature of 143°C and a stretching ratio of 2.8. The obtained phase difference film 3 has a Re(550) of 141 nm, a Re(450) / Re(550) ratio of 0.86, and an Nz coefficient of 1.12. The above-mentioned phase difference film 3 is equivalent to a so-called λ / 4 plate.

[0511] [Fabrication of Circular Polarizer 2] The aforementioned phase retardation film 3 and the laminates 1-14 were bonded together using an adhesive, with the angle between the transmissivity central axis of the laminates 1-14 projected onto the surface of the laminates and the slow axis of the phase retardation film 3, and the light absorption anisotropic film 1-14 side of the laminates 1-14 becoming the phase retardation film 3 side. This process created a circular polarizer 2. Furthermore, the bonding surface between the phase retardation film 3 and the laminates 1-14 was corona-treated, and the aforementioned adhesive 1 was used as the adhesive.

[0512] [Fabrication of Organic EL Display Device (Display Device 2)] A Samsung Galaxy S5 equipped with an organic EL panel (organic EL display element) was disassembled. The touch panel with a circular polarizer was peeled off from the organic EL display device, and then the circular polarizer was peeled off from the touch panel, separating the organic EL display element, touch panel, and circular polarizer separately. Next, the separately separated touch panel was reattached to the organic EL display element, and then the phase retardation film 2 side of the circular polarizer 2 was attached to the touch panel in a manner that prevents air from entering, thereby fabricating the organic EL display device (display device 2).

[0513] It has been confirmed that in the display devices 1 and 2 manufactured in this way, the laminate (optical film) of the present invention has sufficient performance as an optical compensation film.

[0514] Symbol Explanation 100 - Virtual Reality Display Device; 11 - First Phase Difference Layer; 12 - Second Phase Difference Layer; 13 - Third Phase Difference Layer; 21 - First Absorbing Linear Polarizer; 22 - Second Absorbing Linear Polarizer; 30 - Reflective Circular Polarizer; 40 - Semi-transparent Mirror; 50 - Anti-reflective Layer; 60 - Positive C-plate; 70 - Image Display Panel.

Claims

1. A liquid crystal composition comprising: a liquid crystal compound; a dichroic substance; and a polymer having a repeating unit A comprising a structure represented by the following formula (A), [Chemical Formula 1] In formula (A), R A1 and R A2 Each can be used independently to represent a hydrogen atom or an alkyl group. R A3 Indicates a hydrogen atom, a halogen atom, or a substituent. X represents a substituent comprising one or more structures represented by the following formula (a), [Chemical Formula 2] In formula (a), Indicates the bonding location, R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents.

2. The liquid crystal composition according to claim 1, wherein, The polymer also has a repeating unit B represented by the following formula (B), [Chemical Formula 3] In formula (B), R B1 R B2 and R B3 Each can independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, or an aryl group. R B4 and R B5 Each can independently represent a hydrogen atom or a substituent, in R B4 and R B5 In the case of substituents, R B4 and R B5 They can be connected to form a ring.

3. The liquid crystal composition according to claim 2, wherein, In equation (B), R B4 and R B5 The total molecular weight is below 100.

4. The liquid crystal composition according to claim 2, wherein, In equation (B), R B4 and R B5 Organic groups consisting of 1 to 15 hydrogen or carbon atoms, respectively.

5. The liquid crystal composition according to claim 1, wherein, The polymer also has a repeating unit D represented by formula (D), [Chemical Formula 4] In equation (D), R D1 R D2 and R D3 Each can independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, or an aryl group. L D1 Indicates a single bond, -COO-, or -CO-. Sp D1 The term represents a divalent hydrocarbon group having 1 to 20 carbon atoms, wherein one or more non-adjacent -CH2- atoms constituting part of the hydrocarbon group can be independently substituted by -O-, -S-, -NH-, or -N(Q)-, where Q represents a substituent. L D2 and L D3 Each can be used independently to represent a single bond or a divalent linker. Cy D This indicates a divalent linker group containing a mesocrystalline group. D represents a hydrogen-bonded group composed of hydrogen atoms and nonmetallic atoms from groups 14 to 16, wherein the nonmetallic atoms may have substituents. n represents an integer from 1 to 3. When n is 2 or 3, multiple L D2 They can be the same or different, multiple Cy D They can be the same or different.

6. The liquid crystal composition according to claim 5, wherein, In the formula (D), L D3 This indicates a single bond; D represents -COOH or -NHCOR. 2 or -CONHR 3 , Here, R 2 and R 3 Each of the alkyl or alkenyl groups having 1 to 10 carbon atoms can be independently represented, wherein one or more non-adjacent -CH2- groups constituting part of the alkyl and alkenyl groups can be replaced by -O-.

7. The liquid crystal composition according to claim 5, wherein, In the formula (D), L D3 Indicates a single bond, D represents -NHCOR 4 , Here, R 4 The alkyl or alkenyl group having 1 to 3 carbon atoms, wherein one or more non-adjacent -CH2- groups constituting part of the alkyl or alkenyl group may be replaced by -O-.

8. The liquid crystal composition according to claim 5, wherein, In the formula (D), n is 1 or 2.

9. The liquid crystal composition according to claim 1, wherein, The repeating unit A is the repeating unit A-1 represented by equation (A-1). [Chemical Formula 5] In formula (A-1), R A1 and R A2 Each can be used independently to represent a hydrogen atom or an alkyl group. R A3 Indicates a hydrogen atom, a halogen atom, or a substituent. L A1 Indicates a single bond, -O-, or -NR Z -, where R Z Represents a hydrogen atom or a substituent. L A2 Indicates a single bond or an m+1 valence linker. m represents an integer greater than or equal to 1. R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents. When m is an integer greater than 2, multiple R a1 They can be the same or different, multiple R a2 They can be the same or different, multiple R a3 They can be the same or different.

10. The liquid crystal composition according to claim 9, wherein, In the formula (A-1), m is an integer greater than or equal to 2.

11. The liquid crystal composition according to claim 1, wherein, The polymer has repeating unit A-1 represented by formula (A-1), repeating unit B represented by formula (B), and repeating unit D represented by formula (D). [Chemical Formula 6] In formula (A-1), R A1 and R A2 Each can be used independently to represent a hydrogen atom or an alkyl group. R A3 Indicates a hydrogen atom, a halogen atom, or a substituent. L A1 Indicates a single bond, -O-, or -NR Z -, where R Z Represents a hydrogen atom or a substituent. L A2 Indicates a single bond or an m+1 valence linker. m represents an integer greater than or equal to 1. R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents. When m is an integer greater than 2, multiple R a1 They can be the same or different, multiple R a2 They can be the same or different, multiple R a3 They can be the same or different. [Chemical Formula 7] In formula (B), R B1 R B2 and R B3 Each can independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, or an aryl group. R B4 and R B5 Each can independently represent a hydrogen atom or a substituent, in R B4 and R B5 In the case of substituents, R B4 and R B5 They can be connected to form a ring. [Chemical Formula 8] In equation (D), R D1 R D2 and R D3 Each can independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, or an aryl group. L D1 Indicates a single bond, -COO-, or -CO-. Sp D1 The term represents a divalent hydrocarbon group having 1 to 20 carbon atoms, wherein one or more non-adjacent -CH2- atoms constituting part of the hydrocarbon group can be independently substituted by -O-, -S-, -NH-, or -N(Q)-, where Q represents a substituent. L D2 and L D3 Each can be used independently to represent a single bond or a divalent linker. Cy D This indicates a divalent linker group containing a mesocrystalline group. D represents a hydrogen-bonded group composed of hydrogen atoms and nonmetallic atoms from groups 14 to 16, wherein the nonmetallic atoms may have substituents. n represents an integer from 1 to 3. When n is 2 or 3, multiple L D2 They can be the same or different, multiple Cy D They can be the same or different.

12. The liquid crystal composition according to claim 1, wherein, The mass ratio of the polymer content to the dichroic substance content is 0.0007 to 0.

6.

13. The liquid crystal composition according to claim 1, wherein, The liquid crystal compound comprises a high molecular weight liquid crystal compound.

14. The liquid crystal composition according to claim 13, wherein, The liquid crystal compound also includes low molecular weight liquid crystal compounds.

15. A light-absorbing anisotropic film obtained using the liquid crystal composition according to any one of claims 1 to 14.

16. The light-absorbing anisotropic film according to claim 15, wherein, The orientation states of the liquid crystal compounds and dichroic substances contained in the light-absorbing anisotropic film are fixed. The angle θ between the central axis of the transmittance of the light-absorbing anisotropic film and the normal direction of the surface of the light-absorbing anisotropic film exceeds 45° and is less than 90°.

17. A laminate comprising the light-absorbing anisotropic film and the λ / 4 plate as described in claim 15.

18. An image display device comprising the light-absorbing anisotropic film and display element as described in claim 15.

19. A polymer having: The repeating unit A-1 is represented by equation (A-1); and At least one of the repeating unit B represented by equation (B) and the repeating unit D represented by equation (D), [Chemical Formula 9] In formula (A-1), R A1 and R A2 Each can be used independently to represent a hydrogen atom or an alkyl group. R A3 Indicates a hydrogen atom, a halogen atom, or a substituent. L A1 Indicates a single bond, -O-, or -NR Z -,in, R Z Represents a hydrogen atom or a substituent. L A2 Indicates a single bond or an m+1 valence linker. m represents an integer greater than or equal to 1. R a1 R a2 and R a3 Each can be independently represented as an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents. When m is an integer greater than 2, multiple R a1 They can be the same or different, multiple R a2 They can be the same or different, multiple R a3 They can be the same or different. [Chemical Formula 10] In formula (B), R B1 R B2 and R B3 Each can independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, or an aryl group. R B4 and R B5 Each can independently represent a hydrogen atom or a substituent, in R B4 and R B5 In the case of substituents, R B4 and R B5 They can be connected to form a ring. [Chemical Formula 11] In equation (D), R D1 R D2 and R D3 Each can independently represent a hydrogen atom, a halogen atom, a cyano group, an alkyl group, an alkenyl group, or an aryl group. L D1 Indicates a single bond, -COO-, or -CO-. Sp D1 The term represents a divalent hydrocarbon group having 1 to 20 carbon atoms, wherein one or more non-adjacent -CH2- atoms constituting part of the hydrocarbon group can be independently substituted by -O-, -S-, -NH-, or -N(Q)-, where Q represents a substituent. L D2 and L D3 Each can be used independently to represent a single bond or a divalent linker. Cy D This indicates a divalent linker group containing a mesocrystalline group. D represents a hydrogen-bonded group composed of hydrogen atoms and nonmetallic atoms from groups 14 to 16, wherein the nonmetallic atoms may have substituents. n represents an integer from 1 to 3. When n is 2 or 3, multiple L D2 They can be the same or different, multiple Cy D They can be the same or different.

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