Optically anisotropic film, optical film, polarizing plate, and image display device

Abstract

The present invention addresses the problem of providing an optically anisotropic film having excellent liquid crystal alignment properties and excellent adhesion to adjacent layers, an optical film, a polarizing plate, and an image display device. This optically anisotropic film is obtained by immobilizing the alignment state of a liquid crystal composition containing a liquid crystal compound, a fluorine-containing polymer A, and a fluorine-containing polymer B. The surface energy of the single film of the fluorine-containing polymer A is greater than the surface energy of the single film of the fluorine-containing polymer B, and the surface energy of the single film of the fluorine-containing polymer B is greater than the surface energy of the single film of the fluorine-containing polymer A. The abundance ratio R (A) represented by formula (1) and the abundance ratio R (B) represented by formula (2) satisfy the relationship represented by formula (3). R (A) = MA (5) / MA (0) (1) R (B) = MB (5) / MB (0) (2) 50 > = R (A) / R (B) > = 5 (3).

Description

Technical Field

[0001] This invention relates to an optical anisotropic film, an optical film, a polarizer, and an image display device. Background Technology

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

[0003] Stretched birefringent films have been used as optical films, but in recent years, it has been proposed to use phase retardation films (optical anisotropic films) utilizing liquid crystal compounds to replace stretched birefringent films.

[0004] Furthermore, it is generally required that the optical film have a uniform thickness in-plane. To achieve this uniform thickness, the liquid crystal composition must be coated uniformly on the substrate.

[0005] As mentioned above, techniques using liquid crystal compositions containing surfactants are known for achieving uniform coating.

[0006] For example, Patent Document 1 describes an optically anisotropic film formed by using a liquid crystal composition in which two fluorinated polymers are mixed together with a liquid crystal compound (

[0071] to

[0080] etc.).

[0007] Previous technical documents

[0008] Patent documents

[0009] Patent Document 1: International Publication No. 2020 / 067291 Summary of the Invention

[0010] The technical problem to be solved by the invention

[0011] The inventors studied the liquid crystal composition and optical anisotropic film described in Patent Document 1, etc., and found that, depending on the type of surfactant contained in the liquid crystal composition (or combination when used together), there is room for improvement in the liquid crystal orientation of the optical anisotropic film formed, and there is also room for improvement in the adhesion with adjacent layers.

[0012] Therefore, the objective of this invention is to provide an optical anisotropic film, an optical film, a polarizer, and an image display device that have excellent liquid crystal orientation and excellent adhesion to adjacent layers.

[0013] means for solving technical problems

[0014] In order to solve the above-mentioned problems, the inventors conducted in-depth research and found that by making the specified ratio of fluoropolymer A and the specified ratio of fluoropolymer B satisfy a specific relationship, it is possible to form an optical anisotropic film with excellent liquid crystal orientation and excellent adhesion to adjacent layers, thus completing the present invention.

[0015] That is, it was discovered that the above-mentioned task can be achieved through the following structure.

[0016] [1] An optically anisotropic film, which is an optically anisotropic film formed by fixing the orientation state of a liquid crystal composition, wherein,

[0017] The liquid crystal composition contains a liquid crystal compound, fluoropolymer A and fluoropolymer B, or contains a liquid crystal compound, silicon-containing polymer C and silicon-containing polymer D.

[0018] The surface energy of a single film containing fluoropolymer A is greater than that of a single film containing fluoropolymer B, or the surface energy of a single film containing silicon polymer C is greater than that of a single film containing silicon polymer D.

[0019] The existence ratio R(A) represented by the following equation (1) and the existence ratio R(B) represented by the following equation (2) satisfy the relationship represented by the following equation (3), or the existence ratio R(C) represented by the following equation (4) and the existence ratio R(D) represented by the following equation (5) satisfy the relationship represented by the following equation (6).

[0020] R(A)=MA(5) / MA(O)…(1)

[0021] R(B)=MB(5) / MB(0)…(2)

[0022] 50≥R(A) / R(B)≥5…(3)

[0023] R(C)=MC(5) / MC(0)…(4)

[0024] R(D)=MD(5) / MD(0)…(5)

[0025] 50≥R(C) / R(D)≥5…(6)

[0026] In equation (1), MA(5) represents the amount of fluoropolymer A present at a position 5 nm along the thickness direction from one surface X of the optical anisotropic film, and MA(0) represents the amount of fluoropolymer A present at surface X. Here, MA(0) represents a value greater than MA(5).

[0027] In equation (2), MB(5) represents the amount of fluoropolymer B present at a position 5 nm along the thickness direction from surface X, and MB(0) represents the amount of fluoropolymer B present at surface X. MB(0) represents a value greater than MB(5).

[0028] In equation (4), MC(5) represents the amount of silicon-containing polymer C present at a position 5 nm along the thickness direction from surface X, and MC(0) represents the amount of silicon-containing polymer C present at surface X. MC(0) represents a value greater than MC(5).

[0029] In equation (5), MD(5) represents the amount of silicon-containing polymer D present at a position 5 nm along the thickness direction from surface X, and MD(0) represents the amount of silicon-containing polymer D present at surface X. MD(0) represents a value greater than MD(5).

[0030] [2] According to the optical anisotropic film described in [1], wherein,

[0031] The liquid crystal composition contains a liquid crystal compound, fluoropolymer A, and fluoropolymer B.

[0032] The surface energy of a single film containing fluoropolymer A is greater than that of a single film containing fluoropolymer B.

[0033] The existence ratio R(A) represented by the following equation (1) and the existence ratio R(B) represented by the following equation (2) satisfy the relationship represented by the following equation (3).

[0034] R(A)=MA(5) / MA(0)…(1)

[0035] R(B)=MB(5) / MB(0)…(2)50≥R(A) / R(B)≥5…(3)

[0036] In equation (1), MA(5) represents the amount of fluoropolymer A present at a position 5 nm along the thickness direction from one surface X of the optical anisotropic film, and MA(0) represents the amount of fluoropolymer A present at surface X. Here, MA(0) represents a value greater than MA(5).

[0037] In equation (2), MB(5) represents the amount of fluoropolymer B present at a position 5 nm along the thickness direction from surface X, and MB(0) represents the amount of fluoropolymer A present at surface X. MB(0) represents a value greater than MB(5).

[0038] [3] According to the optical anisotropic film described in [1] or [2], wherein,

[0039] Fluoropolymer B has repeating units on its side chains containing at least one reactive group selected from the group consisting of acryloyl, methacryl, epoxy, and borate groups.

[0040] [4] An optically anisotropic film according to any one of [1] to [3], wherein,

[0041] The fluoropolymer A has repeating units on its side chains containing at least one polar group selected from the group consisting of hydroxyl and carboxylic acid groups.

[0042] [5] The optical anisotropic film according to any one of [1] to [4] is a positive C-plate or a negative C-plate.

[0043] [6] An optically anisotropic film according to any one of [1] to [5], wherein,

[0044] Both fluoropolymer A and fluoropolymer B have repeating units consisting of 1 to 20 alkyl groups on their side chains, with at least one hydrogen atom replaced by a fluorine atom.

[0045] The number of carbon atoms in the alkyl group of fluoropolymer A is less than the number of carbon atoms in the alkyl group of fluoropolymer B.

[0046] [7] According to the optical anisotropic film described in [6], wherein,

[0047] The alkyl group of fluoropolymer A has 4 or fewer carbon atoms.

[0048] [8] An optically anisotropic film according to any one of [1] to [7], wherein,

[0049] The content of fluoropolymer A is greater than that of fluoropolymer B.

[0050] [9] An optical film having any one of [1] to [8] an optical anisotropic film.

[0051]

[10] A polarizer having an optical anisotropic film and a polarizer as described in any one of [1] to [8].

[0052]

[11] An image display device having an optical anisotropic film as described in any one of [1] to [8].

[0053]

[12] According to the optical anisotropic film described in [1], wherein,

[0054] The liquid crystal composition contains a liquid crystal compound, a silicon-containing polymer C, and a silicon-containing polymer D.

[0055] The surface energy of a single film containing silicon polymer C is greater than that of a single film containing silicon polymer D.

[0056] The existence ratio R(C) expressed by equation (4) and the existence ratio R(D) expressed by equation (5) satisfy the relationship expressed by equation (6).

[0057] R(C)=MC(5) / MC(O)…(4)

[0058] R(D)=MD(5) / MD(0)…(5)

[0059] 50≥R(C) / R(D)≥5…(6)

[0060] In equation (4), MC(5) represents the amount of silicon-containing polymer C present at a position 5 nm along the thickness direction from one surface X of the optical anisotropic film, and MC(O) represents the amount of silicon-containing polymer C present at surface X. MC(0) represents a value greater than MC(5).

[0061] In equation (5), MD(5) represents the amount of fluoropolymer B present at a position 5 nm along the thickness direction from surface X, and MD(0) represents the amount of fluoropolymer D present at surface X. MD(0) represents a value greater than MD(5).

[0062]

[13] According to the optical anisotropic film described in

[12] , wherein,

[0063] The silicon-containing polymer D has repeating units on its side chains containing at least one reactive group selected from the group consisting of acryloyl, methacryloyl, epoxy, and borate groups.

[0064]

[14] The optical anisotropic film according to

[12] or

[13] is a positive C-plate or a negative C-plate.

[0065]

[15] An optically anisotropic film according to any one of

[12] to

[14] , wherein,

[0066] The content of silicon-containing polymer C is greater than that of silicon-containing polymer D.

[0067]

[16] An optical film having any one of

[12] to

[15] an optical anisotropic film.

[0068]

[17] A polarizer having an optical anisotropic film and a polarizer as described in any one of

[12] to

[15] .

[0069]

[18] An image display device having an optical anisotropic film as described in any one of

[12] to

[15] .

[0070] Invention Effects

[0071] According to the present invention, an optical anisotropic film, an optical film, a polarizer, and an image display device with excellent liquid crystal orientation and excellent adhesion to adjacent layers can be provided. Attached Figure Description

[0072] Figure 1 This is a schematic cross-sectional view showing an example of an optical film. Detailed Implementation

[0073] The present invention will now be described in detail.

[0074] 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.

[0075] In addition, in this specification, the numerical range indicated by “~” refers to the range encompassed by the values ​​recorded before and after “~” as the lower and upper limits.

[0076] Furthermore, in this specification, the upper or lower limit of a numerical range recorded in a certain numerical range can be replaced with the upper or lower limit of other numerical ranges recorded in a certain period. Also, the upper or lower limit of a numerical range recorded in this specification can be replaced with the values ​​shown in the embodiments.

[0077] Furthermore, in this specification, each component may be used alone as one of its own substances, or in combination with two or more substances. Where two or more substances are used in combination with each component, the content of that component, unless otherwise specified, refers to the total content of the combined substances.

[0078] Furthermore, in this specification, "(meth)acrylic acid" is a term used to refer to "acrylic acid" or "methacrylic acid".

[0079] Furthermore, the bonding direction of the divalent groups (e.g., -O-CO-) described in this specification is not particularly limited; for example, in "L 1 -L 2 -L 3 In the bonding of ", in L 2 In the case of -O-CO-, when bonded to L 1 The side position is set to *1, and the bond is placed on L. 3 When the side position is set to *2, L 2 It can be *1-O-CO-*2 or *1-CO-O-*2.

[0080] In this specification, Re(λ) and Rth(λ) represent the in-plane retardation and the thickness-direction retardation at wavelength λ, respectively. Unless otherwise specified, wavelength λ is set to 550 nm.

[0081] Furthermore, in this specification, Re(λ) and Rth(λ) are values ​​measured at wavelength λ in the AxoScan OPMF-1 (manufactured by Opto Science, Inc.).

[0082] Specifically, the average refractive index ((nx+ny+nz) / 3) and film thickness (d(μm)) are calculated using AxoScan OPMF-1 input.

[0083] Slow axis direction (°)

[0084] Re(λ) = R0(λ);

[0085] Rth(λ)=((nx+ny) / 2-nz)×d.

[0086] Additionally, R0(λ) is displayed as a value calculated using AxoScan OPMF-1, but refers to Re(λ).

[0087] [Optical Anisotropic Films]

[0088] The optical anisotropic film involved in the first aspect of the present invention is an optical anisotropic film formed by fixing the orientation state of a liquid crystal composition.

[0089] Furthermore, in the optical anisotropic film according to the first aspect of the present invention, the liquid crystal composition contains a liquid crystal compound, a fluoropolymer A and a fluoropolymer B, the surface energy of the single film of the fluoropolymer A is greater than the surface energy of the single film of the fluoropolymer B, and the presence ratio R(A) expressed by the following formula (1) and the presence ratio R(B) expressed by the following formula (2) satisfy the relationship expressed by the following formula (3).

[0090] In addition, if the above liquid crystal composition has three or more fluorinated polymers, any two fluorinated polymers, namely any two fluorinated polymers that are divided into fluorinated polymers A and B according to the relationship of the surface energy of the single film, can satisfy the relationship expressed by the following formula (3).

[0091] R(A)=MA(5) / MA(0)…(1)

[0092] R(B)=MB(5) / MB(0)…(2)

[0093] 50≥R(A) / R(B)≥5…(3)

[0094] In equation (1), MA(5) represents the amount of fluoropolymer A present at a position 5 nm along the thickness direction from one surface X of the optical anisotropic film, and MA(0) represents the amount of fluoropolymer A present at surface X. Here, MA(0) represents a value greater than MA(5).

[0095] In equation (2), MB(5) represents the amount of fluoropolymer B present at a position 5 nm along the thickness direction from surface X, and MB(0) represents the amount of fluoropolymer A present at surface X. MB(0) represents a value greater than MB(5).

[0096] In the first aspect of the present invention, the presence ratio R(A) represented by the above formula (1) and the presence ratio R(B) represented by the above formula (2) preferably satisfy the relationship represented by the following formula (3-1), and more preferably satisfy the relationship represented by the following formula (3-2).

[0097] 45≥R(A) / R(B)≥10…(3-1)

[0098] 30≥R(A) / R(B)≥15…(3-2)

[0099] The presence ratio R(A) represented by equation (1) and the presence ratio R(B) represented by equation (2) refer to the values ​​measured by the following method using time-of-flight secondary ion mass spectrometry (TOF-SIMS).

[0100] While using Ar-GCIB to measure the 900 μm of one surface X of the optically anisotropic film as the measurement object. 2 The area was etched while analysis was performed using TOF-SIMS (TOF-SIMS5, manufactured by ION-TOF).

[0101] Specifically, regarding the presence ratio R(A), measurements were taken at 900 μm. 2 The surface X (i.e., the outermost surface that has not been etched) and the 900 μm exposed by etching from surface X along the thickness direction to a depth of 5 nm. 2 The surface contains ions equivalent to those originating from fluorinated polymer A (e.g., C5F7). - The secondary ion intensity of fragments (e.g., X, etc.) was determined, and the presence ratio R(A) was calculated based on these intensity ratios (5 nm position / surface X).

[0102] Similarly, regarding the presence ratio R(B), measurements were taken at 900 μm. 2 The surface X (i.e., the outermost surface that has not been etched) and the 900 μm exposed by etching from surface X along the thickness direction to a depth of 5 nm. 2 The surface contains ions equivalent to those derived from fluorinated polymer B (e.g., C7F).11 - The secondary ion intensity of fragments (etc.) was determined, and the presence ratio R(B) was calculated based on these intensity ratios (5nm position / surface X).

[0103] The optical anisotropic film involved in the second aspect of the present invention is an optical anisotropic film formed by fixing the orientation state of a liquid crystal composition.

[0104] Furthermore, in the optical anisotropic film according to the second aspect of the present invention, the liquid crystal composition contains a liquid crystal compound, a silicon-containing polymer C and a silicon-containing polymer D, the surface energy of the single film of silicon-containing polymer C is greater than the surface energy of the single film of silicon-containing polymer D, and the presence ratio R(C) expressed by the following formula (4) and the presence ratio R(D) expressed by the following formula (5) satisfy the relationship expressed by the following formula (6).

[0105] In addition, if the above liquid crystal composition has three or more silicon-containing polymers, any two silicon-containing polymers, namely, any two silicon-containing polymers that are divided into silicon-containing polymers C and D according to the relationship of the surface energy of the single film, can satisfy the relationship expressed by the following formula (6).

[0106] R(C)=MC(5) / MC(0)…(4)

[0107] R(D)=MD(5) / MD(0)…(5)

[0108] 50≥R(C) / R(D)≥5…(6)

[0109] In equation (4), MC(5) represents the amount of silicon-containing polymer C present at a position 5 nm along the thickness direction from one surface X of the optical anisotropic film, and MC(0) represents the amount of silicon-containing polymer C present at surface X. Wherein, MC(0) represents a value greater than MC(5).

[0110] In equation (5), MD(5) represents the amount of fluoropolymer B present at a position 5 nm along the thickness direction from surface X, and MD(0) represents the amount of fluoropolymer D present at surface X. MD(0) represents a value greater than MD(5).

[0111] In the second aspect of the present invention, the presence ratio R(C) represented by the above formula (4) and the presence ratio R(D) represented by the above formula (5) preferably satisfy the relationship represented by the following formula (5-1), and more preferably satisfy the relationship represented by the following formula (5-2).

[0112] 45≥R(C) / R(D)≥10…(5-1)

[0113] 30≥R(C) / R(D)≥15…(5-2)

[0114] The presence ratio R(C) represented by equation (4) and the presence ratio R(D) represented by equation (5) refer to the values ​​measured using TOF-SIMS in the same way as in the first method.

[0115] In this invention, as described above, by satisfying the relationship represented by the above formula (3) between the presence ratio R(A) of fluorinated polymer A and the presence ratio R(B) of fluorinated polymer B, or by satisfying the relationship represented by the above formula (6) between the presence ratio R(C) of silicon polymer C and the presence ratio R(D) of silicon polymer D, an optically anisotropic film with excellent liquid crystal orientation and excellent adhesion to adjacent layers can be formed.

[0116] The details of the reason are not yet clear, but the inventors speculate that it is due to the following reasons.

[0117] That is, it is believed that, regarding fluoropolymers A and B, fluoropolymer A, with its high surface energy, exists within the optically anisotropic film and interacts with the liquid crystal compound, while fluoropolymer B, with its low surface energy, interacts with adjacent layers near the surface of the optically anisotropic film. This allows for the formation of an optically anisotropic film with excellent liquid crystal orientation and excellent adhesion to adjacent layers. Furthermore, the same principle applies to silicon-containing polymers C and D.

[0118] Hereinafter, with respect to the optical anisotropic film according to the first and second embodiments of the present invention (hereinafter, unless otherwise specified, referred to as "the optical anisotropic film of the present invention"), the components of the liquid crystal composition before the orientation state is fixed will be described in detail.

[0119] [Liquid Crystal Compounds]

[0120] There are no particular limitations on the liquid crystal compounds contained in the liquid crystal composition.

[0121] There is no particular limitation on the types of liquid crystal compounds contained in the liquid crystal composition.

[0122] Liquid crystal compounds are typically classified into rod-shaped and disk-shaped types based on their shape. They are also categorized into low-molecular-weight and high-molecular-weight types. High-molecular-weight compounds generally refer to those with a degree of polymerization of 100 or higher (Polymer Physics and Phase Transition Dynamics, Masao Doi, p. 2, Iwanami Shoten, 1992).

[0123] In this invention, any liquid crystal compound can be used, but rod-shaped liquid crystal compounds or disc-shaped liquid crystal compounds (disc-shaped liquid crystal compounds) are preferred. Two or more rod-shaped liquid crystal compounds, two or more disc-shaped liquid crystal compounds, or a mixture of rod-shaped and disc-shaped liquid crystal compounds can also be used.

[0124] The liquid crystal compound is preferably a polymerizable liquid crystal compound having polymerizable groups.

[0125] The preferred polymerizable liquid crystal compound is selected from at least one polymerizable liquid crystal compound chosen from the group consisting of polymerizable rod-shaped liquid crystal compounds and polymerizable disk-shaped liquid crystal compounds.

[0126] Examples of polymerizable groups include acryloyl, methacryloyl, epoxy, and vinyl groups.

[0127] By polymerizing a liquid crystal compound having such polymerizable groups, the orientation of the liquid crystal compound can be fixed. Furthermore, after the liquid crystal compound is fixed through polymerization, it is no longer necessary to exhibit liquid crystal properties.

[0128] As a rod-shaped liquid crystal compound, the compound described in claim 1 of Japanese Patent Application Publication No. 11-513019 or in paragraphs

[0026] to

[0098] of Japanese Patent Application Publication No. 2005-289980 is preferred, and as a disc-shaped liquid crystal compound, the compound described in paragraphs

[0020] to

[0067] of Japanese Patent Application Publication No. 2007-108732 or in paragraphs

[0013] to

[0108] of Japanese Patent Application Publication No. 2010-244038 is preferred.

[0129] Furthermore, reverse wavelength dispersible liquid crystal compounds can also be used as liquid crystal compounds.

[0130] [Fluoropolymers]

[0131] There are no special restrictions on whether fluoropolymer A and B are two fluoropolymers with different surface energies of their single films. The surface energy of the single film of fluoropolymer A is greater than that of the single film of fluoropolymer B.

[0132] The relationship between the surface energies of fluoropolymer monofilms can be determined using the following methods.

[0133] First, the fluoropolymer was diluted to 0.4% with methyl ethyl ketone (MEK).

[0134] Next, the diluted fluoropolymer solution was coated onto a cellulose polymer membrane (ZRD40, manufactured by FUJIFILM Corporation) using a spin coater (3000 rpm), and dried on a hot plate at 70°C for 1 minute to form a single film.

[0135] Next, the contact angles of pure water and diiodomethane on the formed single-film surface were measured, and the surface energy was calculated by substituting them into Owens' surface energy formula.

[0136] Both fluoropolymer A and fluoropolymer B preferably have repeating unit F of alkyl (hereinafter also simply referred to as "fluoroalkyl") having 1 to 20 carbon atoms in the side chain, with at least one hydrogen atom replaced by a fluorine atom.

[0137] In this context, the carbon number of a fluoroalkyl group refers to the number of carbon atoms in which at least one hydrogen atom is replaced by a fluorine atom. That is, even for groups such as -(CH2)2-(CF2)3-CF3, the carbon number of a fluoroalkyl group is 4.

[0138] The main chain structure of the repeating unit F is not particularly limited, and well-known structures can be cited. For example, the backbone is preferably selected from the group consisting of (meth)acrylic acid, styrene, siloxane, cycloolefin, methylpentene, amide and aromatic ester systems.

[0139] Among these, a skeleton selected from the group consisting of (meth)acrylic, siloxane and cycloolefin systems is preferred, and a (meth)acrylic skeleton is even more preferred.

[0140] Based on the reason that the liquid crystal alignment becomes better, the repeating unit F is preferably represented by the following formula (F).

[0141] [Chemical Formula 1]

[0142]

[0143] In the above formula (F), R F1 It represents a hydrogen atom or a substituent.

[0144] Furthermore, L F1 It indicates a single bond or a divalent linkage group.

[0145] Furthermore, L F2 This indicates a single bond or an m+1 valence linkage group.

[0146] Furthermore, X represents a fluoroalkyl group.

[0147] m represents an integer from 1 to 8. When m is an integer from 2 to 8, multiple X values ​​can be the same or different.

[0148] In the above formula (F), m is preferably an integer from 1 to 4, more preferably 1 or 2, and even more preferably 1.

[0149] In addition, as mentioned above, due to L F1 Indicates a single bond or a divalent linkage group, therefore in L F2 In the case of a single bond, m becomes 1.

[0150] R in the above formula (F) F1There is no particular limitation on the types of substituents represented in one manner; well-known substituents can be cited.

[0151] Examples of substituents include halogen atoms, alkyl groups, alkoxy groups, aryl groups, aryloxy groups, cyano groups, carboxyl groups, alkoxycarbonyl groups, and hydroxyl groups.

[0152] Examples of halogen atoms include fluorine, chlorine, bromine, and iodine atoms, with fluorine or chlorine atoms being preferred.

[0153] As an alkyl group, it is preferably a straight-chain alkyl group with 1 to 18 carbon atoms, a branched alkyl group with 3 to 18 carbon atoms, or a cyclic alkyl group, more preferably a straight-chain alkyl group with 1 to 4 carbon atoms, and even more preferably methyl or ethyl.

[0154] The alkoxy group is preferably an alkoxy group with 1 to 18 carbon atoms, more preferably an alkoxy group with 1 to 4 carbon atoms, and even more preferably a methoxy or ethoxy group.

[0155] Examples of aryl groups include those with 6 to 12 carbon atoms, such as phenyl, α-methylphenyl, and naphthyl, with phenyl being the most preferred.

[0156] Examples of aryloxy groups include phenoxy, naphthoxy, imidazoleoxy, benzimidazoleoxy, pyridin-4-yloxy, pyrimidinoxy, quinazolinoxy, purineoxy, and thiophene-3-yloxy.

[0157] Examples of alkoxycarbonyl groups include methoxycarbonyl and ethoxycarbonyl.

[0158] As R F1 Preferably, it is a hydrogen atom or an alkyl group, more preferably a hydrogen atom or a methyl group.

[0159] As L in the above formula (F) F1 The divalent linkage group represented by one of these methods can be exemplified by, for example, -CO-, -O-, -S-, -C(=S)-, -CR-. 1 R 2 -、-CR 3 =CR 4 -、-NR 5 - or a divalent linker consisting of two or more of these. Additionally, R 1 ~R 5 Each can be an alkyl group, representing a hydrogen atom, a fluorine atom, or a carbon atom numbering 1 to 12, respectively.

[0160] Among these divalent linking groups, -O-, -S-, -CO-O-, and -CO-NR are preferred. 5 -or -CO-S-, more preferably -CO-O- or -CO-NR 5-

[0161] As L in the above formula (F) F2 An example of an m+1 valence linking group can be alkylene, ether (-O-), ketone (-C(=O)-), phenylene, thioether (-S-), tertiary carbon atom, quaternary carbon atom, and combinations thereof.

[0162] Furthermore, when m is 1 in the above equation (F), L F2 Preferably, it is an alkylene group, more preferably an alkylene group having 1 to 8 carbon atoms, and even more preferably an alkylene group having 1 to 4 carbon atoms.

[0163] As described above, the fluoroalkyl group represented by X in the above formula (F) is an alkyl group with 1 to 20 carbon atoms in which at least one hydrogen atom is replaced by a fluorine atom.

[0164] In this invention, based on the reason that the liquid crystal orientation is improved, it is preferable that the number of carbon atoms of the fluoroalkyl group in fluoropolymer A is less than the number of carbon atoms of the fluoroalkyl group in fluoropolymer B.

[0165] Specifically, more preferably, the fluoropolymer A has 4 or fewer carbon atoms in its fluoroalkyl group and 6 or more carbon atoms in its fluoroalkyl group.

[0166] When fluoropolymer A and fluoropolymer B contain the above-mentioned repeating unit F, the content of the repeating unit F relative to the total mass of all repeating units of each fluoropolymer is preferably 10 to 50% by mass, more preferably 15 to 45% by mass, and even more preferably 20 to 40% by mass.

[0167] In this invention, for the reason that the liquid crystal orientation is improved, the fluoropolymer A preferably has a repeating unit P that includes at least one polar group selected from the group consisting of hydroxyl and carboxylic acid groups on its side chain.

[0168] The main chain structure of the repeating unit P is not particularly limited, and well-known structures can be cited. For example, the backbone is preferably selected from the group consisting of (meth)acrylic acid, styrene, siloxane, cycloolefin, methylpentene, amide and aromatic ester systems.

[0169] Among these, a skeleton selected from the group consisting of (meth)acrylic, siloxane and cycloolefin systems is preferred, and a (meth)acrylic skeleton is even more preferred.

[0170] Based on the reason that the liquid crystal alignment becomes better, the repeating unit P is preferably represented by the following formula (P).

[0171] [Chemical Formula 2]

[0172]

[0173] In the above formula (P), R P1 It represents a hydrogen atom or a substituent.

[0174] Furthermore, L P1 It indicates a single bond or a divalent linkage group.

[0175] Furthermore, L P2 This indicates a single bond or an n+1 valence linkage group.

[0176] Furthermore, Y represents at least one polar group selected from the group consisting of hydroxyl and carboxylic acid groups.

[0177] n represents an integer from 1 to 8. When n is an integer from 2 to 8, multiple Ys can be the same or different.

[0178] R in the above formula (P) P1 Substituents, L, represented in one manner P1 One way to represent the divalent linker, L P2 One way to represent an n+1 valence linker is to exemplify the R in the above formula (F). F1 Substituents, L, represented in one manner F1 One way to represent the divalent linker, L F2 One way to represent the same group as the m+1 valence linkage group described.

[0179] Furthermore, n in the above formula (P) is preferably an integer from 1 to 4, more preferably 1 or 2, and even more preferably 1.

[0180] Furthermore, L in the above formula (P) P1 Single bonds are preferred.

[0181] Furthermore, L in the above formula (P) P2 Single bonds are preferred.

[0182] Furthermore, Y in the above formula (P) is preferably a carboxylic acid group (-COOH).

[0183] When the fluoropolymer A contains the repeating unit P mentioned above, the content of the repeating unit P relative to the total mass of all repeating units is preferably 1 to 30% by mass, more preferably 5 to 25% by mass, and even more preferably 10 to 20% by mass.

[0184] In this invention, for the sake of better adhesion, the fluoropolymer B preferably has a repeating unit C that includes at least one reactive group selected from the group consisting of acryloyl, methacryl, epoxy and borate groups on its side chain.

[0185] The main chain structure of repeating unit C is not particularly limited, and well-known structures can be cited. For example, the backbone is preferably selected from the group consisting of (meth)acrylic acid, styrene, siloxane, cycloolefin, methylpentene, amide and aromatic ester systems.

[0186] Among these, a skeleton selected from the group consisting of (meth)acrylic, siloxane and cycloolefin systems is preferred, and a (meth)acrylic skeleton is even more preferred.

[0187] As for the reason that the liquid crystal alignment becomes better, the repeating unit C is preferably represented by the following formula (C).

[0188] [Chemical Formula 3]

[0189]

[0190] In the above equation (C), R C1 It represents a hydrogen atom or a substituent.

[0191] Furthermore, L C1 It indicates a single bond or a divalent linkage group.

[0192] Furthermore, L C2 This indicates a single bond or a t+1 valence linkage group.

[0193] Furthermore, Z represents at least one reactive group selected from the group consisting of acryloyl, methacryl, epoxy, and borate.

[0194] t represents an integer from 1 to 8. When t is an integer from 2 to 8, multiple Z can be the same or different.

[0195] R in the above formula (C) C1 Substituents, L, represented in one manner C1 One way to represent the divalent linker, L C2 One way to represent the t+1 valence linkage group can be exemplified by R in the above formula (F). F1 Substituents, L, represented in one manner F1 One way to represent the divalent linker, L F2 One way to represent the same group as the m+1 valence linkage group described.

[0196] Furthermore, t in the above formula (C) is preferably an integer from 1 to 4, more preferably 1 or 2, and even more preferably 1.

[0197] Furthermore, L in the above formula (C) C1 Preferably, it is a divalent linker group, more preferably -O-, -S-, -CO-O-, or -CO-NR. 5 -or -CO-S-, more preferably -CO-O- or -CO-NR 5 -. Additionally, R 5 It represents an alkyl group having 1 to 12 hydrogen atoms, fluorine atoms, or carbon atoms.

[0198] Furthermore, L in the above formula (C) C2 Preferably, it is a divalent linking group, more preferably an alkylene group, an ether group (-O-), a ketone group (-C(=O)-), a phenylene group, or a combination thereof.

[0199] Furthermore, Z in the above formula (C) is preferably at least one reactive group selected from the group consisting of acryloyl, methacryloyl and borate groups.

[0200] When the fluoropolymer B contains the repeating unit C described above, the content of the repeating unit C relative to the total mass of all repeating units is preferably 1 to 40% by mass, more preferably 5 to 35% by mass, and even more preferably 10 to 30% by mass.

[0201] In this invention, based on the fact that fluoropolymer A has a more extensive and uneven distribution in the film thickness direction compared to fluoropolymer B, it is preferable that the content of fluoropolymer A is greater than the content of fluoropolymer B.

[0202] The content of fluoropolymer A relative to the total solid content (100% by mass) of the liquid crystal composition is preferably 0.1 to 10% by mass, more preferably 0.5 to 3% by mass.

[0203] Furthermore, the content of fluoropolymer B relative to the total solid content (100% by mass) of the liquid crystal composition is preferably 0.01 to 3% by mass, more preferably 0.05 to 1% by mass.

[0204] [Silicone-containing polymers]

[0205] There are no special restrictions on whether silicon-containing polymers C and D are two silicon-containing polymers with different surface energies of single films. The surface energy of a single film of silicon-containing polymer C is greater than that of a single film of silicon-containing polymer D.

[0206] The relationship between surface energies in silicon-containing polymer monofilms can be determined using the same method as that used for the relationship between surface energies in fluoropolymer monofilms.

[0207] The silicon-containing polymer is preferably a polymer having repeating units S containing silicon atoms. The repeating unit S is a repeating unit containing silicon atoms.

[0208] The number of silicon atoms contained in the repeating unit S is 1 or more, preferably 2 or more, more preferably 3 to 6, and even more preferably 3 to 5.

[0209] The main chain structure of the repeating unit S is not particularly limited, and well-known structures can be cited. For example, the backbone is preferably selected from the group consisting of (meth)acrylic acid, styrene, siloxane, cycloolefin, methylpentene, amide and aromatic ester systems.

[0210] Among these, a skeleton selected from the group consisting of (meth)acrylic, siloxane and cycloolefin systems is preferred, and a (meth)acrylic skeleton is even more preferred.

[0211] Based on the reason that the liquid crystal alignment becomes better, the repeating unit S is preferably a repeating unit represented by the following formula (a1).

[0212] [Chemical Formula 4]

[0213]

[0214] In formula (a1), m represents an integer of 1 or more. Preferably, m is an integer of 3 or more, more preferably an integer of 3 to 6, and even more preferably an integer of 3 to 5.

[0215] In equation (a1), R 11 R 12 and R 13 Each can independently represent an alkyl, alkenyl, aryl, or alkylene aryl group that may have substituents. Additionally, in R... 11 R 12 R 13 When multiple instances exist, they can be the same or different.

[0216] In equation (a1), R 21 and R 22 Each can be used to represent a hydrogen atom or an alkyl group independently.

[0217] Examples of alkyl groups include straight-chain alkyl groups with 1 to 18 carbon atoms and branched or cyclic alkyl groups with 3 to 18 carbon atoms.

[0218] As R 21 and R 22 Preferably, it contains hydrogen atoms.

[0219] In equation (a1), R 23 It represents a hydrogen atom or a substituent.

[0220] Examples of substituents include alkyl, alkenyl, aryl, or substituents having a linking group and a group containing a silicon atom. Substituents having a linking group and a group containing a silicon atom also include -CH2-CO-L. 1 -L 2 -(Si(R 11 (R) 12 (R) 13 )) m L 1 L 2 R 11 R 12 R 13 The symbols and m are defined in the same way as in equation (a1).

[0221] As R 23 Preferably, it is a hydrogen atom or an alkyl group, more preferably a hydrogen atom or a straight-chain alkyl group having 1 to 4 carbon atoms, further preferably a hydrogen atom, methyl or ethyl, and particularly preferably a hydrogen atom or methyl.

[0222] In equation (a1), L 1 Indicates -O- or NR Z -. R Z It represents a hydrogen atom or an alkyl group (preferably an alkyl group with 1 to 4 carbon atoms).

[0223] As L 1 Preferably -O- or NH-, more preferably -O-.

[0224] In equation (a1), L 2 This indicates an m+1 valence linkage group.

[0225] As the aforementioned m+1 valence linking group, examples preferably include hydrocarbon groups with an m+1 valence that can have 1 to 10 carbon atoms having substituents, and hydrocarbon groups in which a portion of the carbon atoms constituting the hydrocarbon group can be replaced by heteroatoms.

[0226] As a substituent that may be present in the above-mentioned hydrocarbon group, it is preferably an alkyl group, more preferably a straight-chain alkyl group having 1 to 4 carbon atoms, and even more preferably methyl or ethyl.

[0227] Examples of heteroatoms that can replace a portion of the aforementioned carbon atom include silicon, oxygen, and nitrogen.

[0228] As L 2 Examples include groups represented by the structural formulas K-1-L, K-2-L, and K-3-L. Additionally, in the following structural formulas, * indicates a group similar to L in formula (al). 1The bonding position, ** indicates the position of -SiR in equation (al). 11 R 12 R 13 The bonding position of the indicated group.

[0229] Among them, as L 2 Preferably, it is a group represented by the structural formula K-1-L.

[0230] [Chemical Formula 5]

[0231]

[0232] As a specific example of the repeating unit S, one can cite repeating units derived from the monomers represented by K-1 to K-23 below. Additionally, nBu represents n-butyl.

[0233] [Chemical Formula 6]

[0234]

[0235] [Chemical Formula 7]

[0236]

[0237] Silicon-containing polymers can have repeating units other than repeating unit S.

[0238] For example, it may further have the repeating unit P or repeating unit C described above.

[0239] The content of repeating unit S of the silicon-containing polymer relative to the total mass of all repeating units of the silicon-containing polymer is preferably 10 to 50% by mass, more preferably 15 to 45% by mass, and even more preferably 20 to 40% by mass.

[0240] Furthermore, in this invention, the weight-average molecular weight (MW) of fluoropolymers A and B, as well as silicon polymers C and D, is not particularly limited, but is preferably 5,000 to 100,000, and more preferably 8,000 to 50,000.

[0241] In this invention, the weight-average molecular weight is a value determined by gel permeation chromatography (GPC).

[0242] • Solvent (eluent): Tetrahydrofuran

[0243] • Device Name: EcoSEC HLC-8320GPC (Manufactured by Tosoh Corporation)

[0244] • Chromatographic columns: Three columns were used: TSKgel SuperHZM-H, TSKgel SuperHZ4000, and TSKgel SuperHZ200 (all manufactured by TOSOH CORPORATION).

[0245] • Column temperature: 40℃

[0246] • Sample concentration: 0.1% by mass

[0247] • Flow rate: 0.35 ml / min

[0248] Calibration curves: Calibration curves for six samples of TSK standard polystyrene manufactured by TOSOH, ranging from MW=706000 to 1013 (Mw / Mn=1.03 to 1.06).

[0249] [Solvent]

[0250] From the viewpoint of operability, liquid crystal compositions preferably contain a solvent.

[0251] Examples of solvents include ketones (e.g., acetone, 2-butanone, methyl ethyl ketone, 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), halogenated carbons (e.g., dichloromethane, chloroform, dichloroethane, dichlorobenzene, and chlorotoluene), and esters (e.g., ethyl acetate). Organic solvents such as methyl esters, ethyl acetate, ethyl propionate, butyl acetate and diethyl carbonate, alcohols (e.g. ethanol, isopropanol, butanol and cyclohexane), cellosols (e.g. methyl cellosol, ethyl cellosol and 1,2-dimethoxyethane), cellosol acetates, sulfoxides (e.g. dimethyl sulfoxide), amides (e.g. dimethylformamide and dimethylacetamide, N-methylpyrrolidone, N-ethylpyrrolidone, 1,3-dimethyl-2-imidazolium ketone), and heterocyclic compounds (e.g. pyridine) as well as water.

[0252] These solvents can be used individually or in combination with two or more solvents.

[0253] Among these solvents, organic solvents are preferred, and ketones and / or esters are more preferred, based on the reason that the orientation of the formed optically anisotropic film becomes good.

[0254] [Polymerization initiator]

[0255] The liquid crystal composition may contain a polymerization initiator. There are no particular limitations on the polymerization initiator, but a photosensitive compound, i.e., a photopolymerization initiator, is preferred.

[0256] As photopolymerization initiators, a wide variety of compounds can be used without particular restrictions. Examples of photopolymerization initiators include α-carbonyl compounds, azo dyes, α-hydrocarbon-substituted aromatic azo dyes, polynuclear quinone compounds, combinations of triarylimidazolium dimers and p-aminophenyl ketones, acridine and phenazine compounds, oxadiazole compounds, o-acyl oxime compounds, and acylphosphine oxide compounds.

[0257] 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.

[0258] When the liquid crystal composition contains a polymerization initiator, the content of the polymerization initiator is preferably 0.01 to 30% by mass, more preferably 0.1 to 15% by mass, relative to the total solid content (100% by mass) of the liquid crystal composition.

[0259] [Methods for fabricating optically anisotropic films]

[0260] The method for manufacturing the optical anisotropic film of the present invention is not particularly limited. For example, a method can be described in which the liquid crystal composition of the present invention described above is used to achieve the desired orientation state and then immobilized by polymerization.

[0261] The orientation state is not particularly limited and can be any of the following: horizontal orientation, vertical orientation, tilted orientation, and twisted orientation.

[0262] Furthermore, there are no particular restrictions on the polymerization conditions, but in polymerization utilizing light irradiation, ultraviolet light is preferred. The irradiation dose is preferably 10 mJ / cm². 2 ~50J / cm 2 More preferably 20 mJ / cm 2 ~5J / cm 2 Further preferred is 30 mJ / cm 2 ~3J / cm 2 The preferred value is 50–1000 mJ / cm³. 2 Furthermore, to promote the polymerization reaction, it can be carried out under heating conditions.

[0263] Furthermore, optical anisotropic films can be formed on any support or orientation film in the optical films described later, or on the polarizer in the polarizers described later.

[0264] The optical anisotropic film of the present invention is preferably a positive C-plate (positive C-plate) and a negative C-plate (negative C-plate).

[0265] The positive C-plate satisfies equation (C1), and the negative C-plate satisfies equation (C2). Furthermore, the Rth of the positive C-plate is negative, and the Rth of the negative C-plate is positive.

[0266] Equation (C1) nz>nx≈ny

[0267] Equation (C2) nz<nx≈ny

[0268] Furthermore, the “≈” above refers not only to cases where the two are completely identical, but also to cases where they are substantially identical. “Substantially identical” means, for example, that even when (nx-ny)×d (where d is the film thickness) is 0 to 10 nm, and preferably 0 to 5 nm, it is included in “nx≈ny”.

[0269] [Optical film]

[0270] The optical film of the present invention is an optical film having the optical anisotropy film of the present invention.

[0271] refer to Figure 1 The structure of the optical film is explained. Figure 1 This is a schematic cross-sectional view showing an example of an optical film.

[0272] in addition, Figure 1 For illustrative purposes only; the thickness and positional relationships of the layers may not necessarily match reality. Figure 1 The support and orientation film shown are arbitrary components.

[0273] Figure 1 The optical film 10 shown has a support 16, an alignment film 14 and the optical anisotropic film 12 of the present invention in sequence.

[0274] Furthermore, the optical anisotropic film 12 can be a stack of two or more different optical anisotropic films. For example, when the polarizer of the present invention described later is used as a circular polarizer, or when the optical film of the present invention is used as an optical compensation film for a liquid crystal display device of IPS (In-Plane-Switching) or FFS (Fringe-Field-Switching) mode, it is preferably a stack of positive A plate and positive C plate.

[0275] Furthermore, the optical anisotropic film can be peeled off from the support and used as an optical film on its own.

[0276] The following is a detailed description of the various components used in optical films.

[0277] [Optical anisotropic films]

[0278] The optical anisotropic film of the present invention is the optical anisotropic film of the present invention as described above.

[0279] In optical films, there are no particular limitations on the thickness of the aforementioned optical anisotropic films, which is preferably 0.1 to 10 μm, and more preferably 0.5 to 5 μm.

[0280] [Support]

[0281] As described above, the optical film can have a support as a substrate for forming the optical anisotropic film.

[0282] This support is preferably transparent. Specifically, the light transmittance is preferably 80% or higher.

[0283] Examples of such supports include glass substrates and polymer films. Examples of polymer film materials include cellulose-based polymers; acrylic polymers such as polymethyl methacrylate and polymers containing lactone rings; thermoplastic norbornene-based polymers; polycarbonate-based polymers; polyester-based polymers such as polyethylene terephthalate and polyethylene naphthalate; styrene-based polymers such as polystyrene and acrylonitrile-styrene copolymers (AS resins); polyolefin-based polymers such as polyethylene, polypropylene, and ethylene-propylene copolymers; vinyl chloride-based polymers; amide-based polymers such as nylon and aromatic polyamides; imide-based polymers; sulfone-based polymers; polyethersulfone-based polymers; polyetheretherketone-based polymers; polyphenylene sulfide-based polymers; vinylidene chloride-based polymers; vinyl alcohol-based polymers; vinyl butyral-based polymers; aromatic ester-based polymers; polyoxymethylene-based polymers; epoxy-based polymers; and polymers composed of mixtures of these polymers.

[0284] Furthermore, the deflector described later can also serve as this support.

[0285] The thickness of the support is not particularly limited, but is preferably 5 to 100 μm, more preferably 5 to 50 μm. The support is preferably peelable.

[0286] [Orientation film]

[0287] In optical films, the optically anisotropic film is preferably formed on the surface of the alignment film. When the optical film has any of the aforementioned supports, the alignment film can be sandwiched between the support and the optically anisotropic film. Furthermore, the aforementioned support can also serve as the alignment film.

[0288] The alignment film can be any film as long as it has the function of orienting the polymeric liquid crystal compound contained in the composition.

[0289] Alignment films typically use polymers as the main component. Polymer materials for alignment films are documented in numerous publications, and many commercially available products are readily available.

[0290] Polyvinyl alcohol, polyimide, or any derivative thereof are preferred as polymer materials for orientation films, and modified or unmodified polyvinyl alcohol is more preferred.

[0291] Since the object does not come into contact with the surface of the alignment film during the formation of the alignment film, the deterioration of the surface morphology can be prevented. Therefore, photoalignment film is also preferred as the alignment film.

[0292] There are no particular restrictions on the photoalignment film, but alignment films formed from polymers such as polyamide compounds and polyimide compounds as described in paragraphs

[0024] to

[0043] of International Publication No. 2005 / 096041; liquid crystal alignment films formed from liquid crystal alignment agents having cinnamic acyl groups as described in Japanese Patent Application Publication No. 2012-155308; and products manufactured by Rolic Technologies Ltd. under the trade name LPP-JP265CP, etc.

[0293] There is no particular limitation on the thickness of the alignment film, but from the viewpoint of forming an optically anisotropic film with uniform film thickness by mitigating the surface irregularities that may exist on the support, it is preferably 0.01 to 10 μm, more preferably 0.01 to 1 μm, and even more preferably 0.01 to 0.5 μm.

[0294] [Polarizing filter]

[0295] The polarizer of the present invention has the optical anisotropic film and polarizer described above.

[0296] There are no particular restrictions on the polarizer as long as it is a component that has the function of converting light into specific linearly polarized light. Existing known absorption polarizers, reflection polarizers, and coating polarizers can be used.

[0297] As an absorption-type polarizer, iodine-based polarizers, dye-based polarizers utilizing dichroic dyes, and polyene-based polarizers can be used. Iodine-based polarizers and dye-based polarizers include coated polarizers and stretched polarizers. Although both can be used, polarizers made by adsorbing iodine or dichroic dyes onto polyvinyl alcohol and then stretching it are preferred.

[0298] Examples of coating-type polarizers include polarizers containing cured liquid crystal compounds and dichroic pigments.

[0299] As a reflective polarizer, polarizers can be obtained by stacking thin films with different birefringence, wire grid polarizers, and polarizers composed of cholesteric liquid crystal with selective reflection region and quarter-wave plate, etc.

[0300] There is no particular limitation on the thickness of the polarizer, but it is preferably 3 to 60 μm, more preferably 3 to 30 μm, and even more preferably 3 to 10 μm.

[0301] [Pressure-sensitive adhesive layer]

[0302] In polarizers, a pressure-sensitive adhesive layer can be disposed between the optical anisotropic film in the optical film and the polarizer.

[0303] Materials used to form pressure-sensitive adhesive layers for laminated cured products and polarizers include, for example, components formed from substances whose storage modulus G' to loss modulus G” ratio (tanδ=G” / G') measured by a dynamic viscoelasticity measuring device is 0.001 to 1.5, including so-called pressure-sensitive adhesives and substances prone to creep. Examples of pressure-sensitive adhesives include, for example, polyvinyl alcohol-based pressure-sensitive adhesives, but they are not limited to these.

[0304] [Adhesive layer]

[0305] Regarding polarizers, an adhesive layer can be disposed between the optical anisotropic film in the optical film and the polarizer.

[0306] As an adhesive layer for use between laminated cured materials and polarizers, a curable adhesive composition that is cured by irradiation or heating with active energy rays is preferred.

[0307] Examples of curable adhesive compositions include curable adhesive compositions containing cationic polymeric compounds and curable adhesive compositions containing free radical polymeric compounds.

[0308] The thickness of the adhesive layer is preferably 0.01 to 20 μm, more preferably 0.01 to 10 μm, and even more preferably 0.05 to 5 μm. If the thickness of the adhesive layer is within this range, no lifting or peeling will occur between the laminated protective layer or optical anisotropic film and the polarizer, and a practically problem-free adhesive force can be obtained. Furthermore, from the viewpoint of suppressing the generation of air bubbles, the thickness of the adhesive layer is preferably 0.4 μm or more.

[0309] As an adhesive layer, for example, reference can be made to paragraphs

[0062] to

[0080] of Japanese Patent Application Publication No. 2016-35579, the contents of which are incorporated into the specification of this application.

[0310] [Easy-to-adhere layer]

[0311] Regarding polarizers, an easy-bonding layer can be disposed between the optically anisotropic film and the polarizer in the optical film. From the viewpoint of excellent adhesion between the optically anisotropic film and the polarizer and further suppression of crack formation in the polarizer, the storage modulus of the easy-bonding layer at 85°C is preferably 1.0 × 10⁻⁶. 6 Pa ~ 1.0 × 10 7 Pa. Examples of materials that can form the easy-to-bond layer include polyolefin-based and polyvinyl alcohol-based components. The thickness of the easy-to-bond layer is preferably 500 nm to 1 μm.

[0312] As an easily adhesive layer, for example, reference can be made to paragraphs

[0048] to

[0053] of Japanese Patent Application Publication No. 2018-36345, the contents of which are incorporated into the specification of this application.

[0313] [Image display device]

[0314] The image display device of the present invention is an image display device having the light absorption anisotropic film of the present invention.

[0315] There are no particular limitations on the display elements used in the image display device; examples include liquid crystal cells, organic electroluminescent (hereinafter referred to as "EL (Flectro Luminescence)") display panels, and plasma display panels. Among these, liquid crystal cells and organic EL display panels are preferred.

[0316] [Liquid Crystal Display Device]

[0317] As an example of an image display device, a liquid crystal display device is a liquid crystal display device having the aforementioned polarizer and liquid crystal unit.

[0318] Furthermore, among the polarizers disposed on both sides of the liquid crystal cell, it is preferable to use the aforementioned polarizer as the front polarizer, and more preferably to use the aforementioned polarizer as both the front and rear polarizers.

[0319] <Liquid Crystal Unit>

[0320] 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, FFS (Fringe-Field-Switching) mode or TN (Twisted Nematic) mode, but are not limited to these.

[0321] [Organic EL display device]

[0322] As an example of an image display device, an organic EL display device can be described as having, in sequence from the visual recognition side, a polarizer, a λ / 4 plate composed of the aforementioned optical anisotropic film, and an organic EL display panel.

[0323] 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.

[0324] Example

[0325] The present invention will now be described in further detail with reference to embodiments. Appropriate modifications can be made to the materials, amounts, proportions, processing contents, and processing steps shown in the following embodiments, as long as they do not depart from the spirit of the invention. Therefore, the scope of the present invention should not be interpreted as limited by the embodiments shown below.

[0326] [Example 1]

[0327] [Fabrication of optical anisotropic film A]

[0328] A liquid crystal composition A, consisting of the following components, was coated onto TAC1 (cellulose polymer film ZRD40, manufactured by FUJIFILM Corporation) which served as a temporary support using a die coater.

[0329] Next, in order to dry the solvent of liquid crystal composition A and to ripen the orientation of the liquid crystal compound, it was heated with warm air at 60°C for 60 seconds.

[0330] Next, under nitrogen purging, with an oxygen concentration of 100 ppm, and ultraviolet irradiation at 60°C (120 mJ / cm²), the mixture was subjected to ultraviolet irradiation. 2 The orientation of the liquid crystal compound was fixed, thereby creating a film A with an optically anisotropic film A on a temporary support. The thickness of the optically anisotropic film A is 0.7 μm, Re(550) is 0 nm, and Rth(550) is -80 nm.

[0331]

[0332] Rod-shaped liquid crystal compounds (LC-1)

[0333] [Chemical Formula 8]

[0334]

[0335] Rod-shaped liquid crystal compound (LC-2)

[0336] [Chemical Formula 9]

[0337]

[0338] Rod-shaped liquid crystal compound (LC-3)

[0339] [Chemical Formula 10]

[0340]

[0341] Fluoropolymer (FA-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: 23500)]

[0342] [Chemical Formula 11]

[0343]

[0344] Fluoropolymer (FB-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: 13000)]

[0345] [Chemical Formula 12]

[0346]

[0347] Onium salt compound (S01)

[0348] [Chemical Formula 13]

[0349]

[0350] [evaluate]

[0351] The fabricated optical anisotropic film A was evaluated using the methods described below. The results are shown in Table 1.

[0352] [Surface Energy Evaluation of Fluoropolymer Single Films]

[0353] The above-mentioned fluoropolymer (FA-1) was diluted to 0.4% using MEK to prepare a diluted solution.

[0354] Next, the above diluted solution was coated onto TAC1 (cellulose polymer membrane ZRD40, manufactured by FUJIFILM Corporation) using a spin coater (3000 rpm) and dried on a hot plate at 70°C for 1 minute to obtain a monolayer of fluoropolymer (FA-1) formed on the membrane.

[0355] Next, the contact angles of pure water and diiodomethane on the surface of the single membrane were measured, and the surface energy was calculated by substituting them into Owens' surface energy formula.

[0356] A monolayer of fluoropolymer (FB-1) was prepared using the same method, and the surface energy was calculated.

[0357] [Evaluation of the distribution of fluoropolymers]

[0358] While using Ar-GCIB to analyze the 900 μm of the fabricated optical anisotropic film A 2 The area was etched, and the results were analyzed using TOF-SIMS (TOF-SIMS5, manufactured by ION-TOF).

[0359] The C5F7 equivalent was measured at the outermost surface (unetched) and at a depth of 5 nm. - The secondary ion intensity of the fragments was used to determine the presence ratio R(A) of the fluoropolymer (FA-1) at a depth of 5 nm relative to the outermost surface.

[0360] RA = (Secondary ion intensity at 5nm etching) / (Secondary ion intensity at the outermost surface)

[0361] Similarly, according to C7F 11 - The secondary ionic strength ratio of the fragments was used to determine the presence ratio R(B) of the fluoropolymer (FB-1).

[0362] [Evaluation of liquid crystal orientation]

[0363] The polarizing microscope was set to crossed Nicol conditions, and the fabricated film A was observed using a 10x objective lens. 2 mm was counted. 2 The number of orientation defects larger than 1 μm and smaller than 10 μm within the specified range. A total of 10 fields of view were observed and evaluated according to the following criteria.

[0364] A: The number of orientation defects is less than 5 in all 10 fields of view.

[0365] B: In 10 fields of view, there are regions with more than 5 but less than 50 orientation defects.

[0366] C: Areas with more than 50 orientation defects in 10 fields of view are unacceptable.

[0367] D: The entire face is not oriented.

[0368] [Evaluation of fit]

[0369] Fabrication of Liquid Crystal Film for Sealing Test

[0370] A photoalignment film P-1 was fabricated using the method described in Example 1 of International Publication No. 2019 / 159960.

[0371] Next, the test liquid crystal composition T with the following composition was coated onto the photoalignment film P-1, heated to 130°C with warm air, then cooled to 50°C, and irradiated with a high-pressure mercury lamp at a wavelength of 365nm under a nitrogen atmosphere at 100mJ / cm². 2 After exposure to ultraviolet light, the mixture is heated to 120°C and irradiated with 150 mJ / cm². 2 By immobilizing the ultraviolet light, a film (T1) with a 3.0 μm thick liquid crystal film for adhesion testing was fabricated on the photoalignment film P-1.

[0372]

[0373]

[0374] Rod-shaped liquid crystal compound (LC-4)

[0375] [Chemical Formula 14]

[0376]

[0377] Rod-shaped liquid crystal compound (LC-5)

[0378] [Chemical Formula 15]

[0379]

[0380] Rod-shaped liquid crystal compound (LC-6)

[0381] [Chemical Formula 16]

[0382]

[0383] Rod-shaped liquid crystal compound (LC-7)

[0384] [Chemical Formula 17]

[0385]

[0386] Polymerization initiator PI-1

[0387] [Chemical Formula 18]

[0388]

[0389] Leveling agent P1 [The numbers in the following formula represent the content (mass%) of each repeating unit in leveling agent P1 relative to all repeating units. Weight-average molecular weight: 17000]

[0390] [Chemical Formula 19]

[0391]

[0392] <Making of Polarizing Sheets>

[0393] Corona treatment (32 W·min / m) was performed on the surface of the optically anisotropic film A. 2 After that, the following active energy ray curable adhesive composition is applied as a UV curable adhesive to form an adhesive coating film (T2).

[0394] Next, the coated surface (liquid crystal film side) of the above film (T1) is subjected to corona treatment (63 W·min / m). 2 The corona-treated surface is then attached to the adhesive surface of the adhesive coating film (T2).

[0395] Then, a single-sided irradiation of 150 mJ / cm² is applied from side A of the optically anisotropic film. 2 After being exposed to ultraviolet light, the film is dried with hot air at 100°C for 1 minute to form an adhesive layer. Then, the support of the above film (T1) is peeled off together with the photo-aligned film to produce a laminated film (T3).

[0396]

[0397] <Preparation of Evaluation Samples>

[0398] A polarizer with one side of the polarizer exposed was obtained by means of the method described in paragraph

[0162] of Japanese Patent Application Publication No. 2019-159960. After attaching the liquid crystal film side of the above-mentioned laminated film (T3) to the exposed polarizer via a pressure-sensitive adhesive (SK2057, manufactured by Soken Chemical & Engineering Co., Ltd.), the temporary support of film A was peeled off, thereby producing an evaluation sample for the exposure of optical anisotropic film A.

[0399] <Evaluation of Adhesive Layer Adhesion>

[0400] On the surface of the optical anisotropic film A of the evaluation sample, 100 squares were formed by longitudinal and transverse cuts at 1 mm intervals.

[0401] Next, pressure-sensitive tape (manufactured by Nitto Denko Corporation, NO.31B75HIGH) was applied to the cut and left in a fully sealed state for 20 minutes. After repeating the peeling operation 3 times, the number of grids peeled off from the optical anisotropic film A was counted.

[0402] A: Fewer than 5 meshes were peeled off.

[0403] B: More than 6 but less than 20 meshes were stripped.

[0404] C: 21 to 50 meshes were stripped.

[0405] D: More than 51 meshes were stripped.

[0406] [Example 2]

[0407] Except that the fluoropolymer (FA-1) formulated in the liquid crystal composition A was replaced with the fluoropolymer (FA-2) described below, the optical anisotropic film B was prepared in the same manner as in Example 1 and evaluated.

[0408] Fluoropolymer (FA-2) [In the following formula, the value listed for each repeating unit represents the content (mass%) of that repeating unit relative to all repeating units. Weight-average molecular weight: 22000]

[0409] [Chemical Formula 20]

[0410]

[0411] [Example 3]

[0412] The amount of the fluoropolymer (FA-1) in the liquid crystal composition A was changed to 1.8 parts by mass, and the amount of the onium salt compound (SO1) was changed to 1.5 parts by mass. Otherwise, the optical anisotropic film C was prepared in the same manner as in Example 1, and the results were evaluated.

[0413] [Comparative Example 1]

[0414] The amount of the fluoropolymer (FA-1) formulated in the liquid crystal composition A was changed to 3.0 parts by mass, and the amount of the onium salt compound (SO1) was changed to 2.5 parts by mass. Otherwise, the optical anisotropic film D was prepared in the same manner as in Example 1, and the results were evaluated.

[0415] [Comparative Example 2]

[0416] The amount of the fluoropolymer (FA-1) formulated in the liquid crystal composition A was changed to 1.0 parts by mass, and the amount of the onium salt compound (SO1) was changed to 0.83 parts by mass. Otherwise, the optical anisotropic film E was prepared in the same manner as in Example 1, and the results were evaluated.

[0417] [Example 4]

[0418] The amount of the fluoropolymer (FA-1) formulated in the liquid crystal composition A was changed to 1.0 parts by mass, the amount of the onium salt compound (SO1) was changed to 0.83 parts by mass, the amount of methyl ethyl ketone was changed to 191 parts by mass, and the amount of toluene was changed to 444 parts by mass. Otherwise, the optical anisotropic film F was prepared in the same manner as in Example 1 and evaluated.

[0419]

[0420] According to the results shown in Table 1 above, when the value of "R(A) / R(B)" is large, the adhesion with the adjacent layer is poor (Comparative Example 1).

[0421] Furthermore, it can be seen that when the value of "R(A) / R(B)" is small, the liquid crystal orientation is poor (Comparative Example 2).

[0422] In contrast, it can be seen that when the value of "R(A) / R(B)" is 5 to 50, the liquid crystal has excellent orientation and excellent adhesion to adjacent layers (Examples 1 to 4).

[0423] Furthermore, as shown in Examples 1-4, the ratio of "R(A) / R(B)" can be adjusted by varying the type of fluoropolymer, the content of additives, and the solvent composition. It is also speculated that the variation in "R(A) / R(B)" with solvent composition is due to differences in drying speed.

[0424] [Comparative Example 3]

[0425] Except for changing the fluoropolymer (FB-1) formulated in the liquid crystal composition A to the fluoropolymer (FB-2) described below, the optical anisotropic film G was prepared in the same manner as in Example 1 and evaluated.

[0426] Fluoropolymer (FB-2) [In the following formula, the value listed for each repeating unit represents the content (mass %) of that repeating unit relative to all repeating units. (Weight-average molecular weight: 13000)]

[0427] [Chemical Formula 21]

[0428]

[0429] [Comparative Example 4]

[0430] The amount of the fluoropolymer (FB-2) was changed to 3.0 parts by mass, and the amount of the onium salt compound (SO1) was changed to 2.5 parts by mass. Otherwise, the optical anisotropic film H was prepared in the same manner as in Comparative Example 3, and the results were evaluated.

[0431] [Comparative Example 5]

[0432] The amount of the fluoropolymer (FB-2) was changed to 1.0 parts by mass, and the amount of the onium salt compound (SO1) was changed to 0.83 parts by mass. Otherwise, the optical anisotropic film I was prepared in the same manner as in Comparative Example 3, and the results were evaluated.

[0433]

[0434] According to the results shown in Table 2 above, when there is no difference in the number of carbon atoms of the fluoroalkyl groups in fluoropolymers A and B, the value of "R(A) / R(B)" becomes smaller, and the liquid crystal orientation is poor (Comparative Examples 3-5).

[0435] [Comparative Example 6]

[0436] The optically anisotropic film J was prepared using the same method as the transfer film described in paragraphs

[0071] to

[0080] of International Publication No. 2020 / 067291, and was evaluated using the same method as in Example 1. When the fluorinated polymer (M-6) (surface energy of a single film: 31.5 mN / m) contained in the above-described liquid crystal layer forming composition 1 is considered as fluorinated polymer A, and the fluorinated polymer (M-5) (with the same composition as the above-described fluorinated polymer (FA-1)) is considered as fluorinated polymer B, R(A) / R(B) = 0.02. The liquid crystal orientation of the optically anisotropic film J was evaluated as A, and the adhesion to adjacent layers was evaluated as D.

[0437] [Comparative Example 7]

[0438] Based on the method for fabricating an optical film described in paragraphs

[0143] to

[0153] of International Publication No. 2020 / 067291, an optically anisotropic film L was fabricated by changing the cyclic olefin polymer film of the substrate to a polyethylene terephthalate film, and evaluated using the same method as in Example 1. When the surfactant (S1) (surface energy of a single film: 20.9 mN / m) contained in the above-described liquid crystal layer forming composition 1 is considered as fluoropolymer A, and the surfactant (S2) (with the same composition as the above-described fluoropolymer (FB-1)) is considered as fluoropolymer B, R(A) / R(B) = 1. Furthermore, the liquid crystal orientation of the optically anisotropic film L was evaluated as C, and the adhesion to adjacent layers was evaluated as A.

[0439] [Comparative Example 8]

[0440] Using the liquid crystal composition A of Example 1, an optically anisotropic film M was fabricated by the method described in paragraphs

[0066] to

[0079] of International Publication No. 2019 / 022156, and the results were evaluated. When the fluorinated compound (F-3) (single-film surface energy: 20.9 mN / m) or fluorinated compound (F-1) (single-film surface energy: 31.5 mN / m) contained in the coating liquid of the optically anisotropic layer A was considered as fluorinated polymer A, and the fluorinated compound (F-2) (single-film surface energy: 17.1 mN / m) was considered as fluorinated polymer B, both had an R(A) / R(B) = 1. Furthermore, the liquid crystal orientation of the optically anisotropic film M was rated C, and its adhesion to adjacent layers was rated D.

[0441] [Reference Example 1]

[0442] Except that the fluoropolymers (FA-1) and (FB-1) were not incorporated into the liquid crystal composition A, the optical anisotropic film N was prepared in the same manner as in Example 1 and evaluated.

[0443] [Reference Example 2]

[0444] Except that the fluoropolymer (FB-1) was not incorporated into the liquid crystal composition A, the optical anisotropic film O was prepared in the same manner as in Example 1 and evaluated.

[0445]

[0446] As shown in Table 3 above, a comparison between Reference Example 1 and Reference Example 2 shows that when a fluoropolymer (FA-1) is added, although the liquid crystal orientation is improved, the adhesion deteriorates.

[0447] Furthermore, a comparison between Example 1 and Reference Example 2 shows that the fluoropolymer (FB-1) improves the adhesion to adjacent layers.

[0448] [Example 5]

[0449] Except for changing the liquid crystal composition A to the liquid crystal composition P described below, the optical anisotropic film P was prepared using the same method as in Example 1 and evaluated.

[0450]

[0451] Silicon-containing polymer (SiC-1) [In the following formula, the value listed for each repeating unit represents the content (mass%) of each repeating unit relative to all repeating units. Weight-average molecular weight: 15000]

[0452] [Chemical Formula 22]

[0453]

[0454] Silicon-containing polymer (SiD-1) [In the following formula, the value listed for each repeating unit represents the content (mass%) of each repeating unit relative to all repeating units. Weight-average molecular weight: 12000]

[0455] [Chemical Formula 23]

[0456]

[0457] [Comparative Example 9]

[0458] Except for replacing the silicon-containing polymer SiD-1 described above with the silicon-containing polymer SiD-2 described below, the optical anisotropic film Q was fabricated using the same method as in Example 5, and was evaluated.

[0459] Silicon-containing polymer (SiD-2) [In the following formula, the value listed for each repeating unit represents the content (mass%) of each repeating unit relative to all repeating units. Weight-average molecular weight: 12500]

[0460] [Chemical Formula 24]

[0461]

[0462] [Comparative Example 10]

[0463] Except for replacing the silicon-containing polymer SiD-1 with the silicon-containing polymer SiD-3 described below, the optical anisotropic film R was fabricated using the same method as in Example 5, and its performance was evaluated.

[0464] Silicon-containing polymer (SiD-3) [In the following formula, the value listed for each repeating unit represents the content (mass %) of each repeating unit relative to all repeating units. (Weight-average molecular weight: 13000)]

[0465] [Chemical Formula 25]

[0466]

[0467]

[0468] According to the results shown in Table 4 above, when the value of "R(C) / R(D)" is large, the adhesion with the adjacent layer is poor (Comparative Example 10).

[0469] Furthermore, it can be seen that when the value of R(C) / R(D)” is small, the liquid crystal orientation is poor (Comparative Example 9).

[0470] In contrast, it can be seen that when the value of "R(C) / R(D)" is 5 to 50, the liquid crystal has excellent orientation and excellent adhesion to adjacent layers (Example 5).

[0471] In addition, the surface energy evaluation of silicon-containing polymer monofilms and the distribution evaluation of silicon-containing polymers were carried out under the same conditions as the evaluation of fluoropolymers.

[0472] Symbol Explanation

[0473] 10-Optical film, 12-Optical anisotropic film, 14-Orientation film, 16-Support.

Claims

1. An optically anisotropic film, which is an optically anisotropic film formed by immobilizing the orientation state of a liquid crystal composition, wherein, The liquid crystal composition contains a liquid crystal compound, fluoropolymer A, and fluoropolymer B, or contains a liquid crystal compound, silicon-containing polymer C, and silicon-containing polymer D. The surface energy of the single film of fluoropolymer A is greater than that of the single film of fluoropolymer B, or the surface energy of the single film of silicon-containing polymer C is greater than that of the single film of silicon polymer D. The existence ratio R(A) expressed by equation (1) and the existence ratio R(B) expressed by equation (2) satisfy the relationship expressed by equation (3), or the existence ratio R(C) expressed by equation (4) and the existence ratio R(D) expressed by equation (5) satisfy the relationship expressed by equation (6). R(A)=MA(5) / MA(0) (1) R(B)=MB(5) / MB(0) (2) 50≥R(A) / R(B)≥5 (3) R(C)=MC(5) / MC(0) (4) R(D)=MD(5) / MD(0) (5) 50≥R(C) / R(D)≥5 (6) In equation (1), MA(5) represents the amount of the fluoropolymer A present at a position 5 nm along the thickness direction from one surface X of the optical anisotropic film, and MA(0) represents the amount of the fluoropolymer A present at surface X, wherein MA(0) represents a value greater than MA(5). In equation (2), MB(5) represents the amount of fluoropolymer B present at a position 5 nm along the thickness direction from the surface X, and MB(0) represents the amount of fluoropolymer B present at the surface X, wherein MB(0) represents a value greater than MB(5). In equation (4), MC(5) represents the amount of silicon-containing polymer C present at a position 5 nm along the thickness direction from the surface X, and MC(0) represents the amount of silicon-containing polymer C present at the surface X, wherein MC(0) represents a value greater than MC(5). In the formula (5), MD(5) represents the amount of the silicon-containing polymer D present at a position 5 nm along the thickness direction from the surface X, and MD(0) represents the amount of the silicon-containing polymer D present at the surface X, wherein MD(0) represents a value greater than MD(5).

2. The optical anisotropic film according to claim 1, wherein, The liquid crystal composition contains a liquid crystal compound, fluoropolymer A, and fluoropolymer B. The surface energy of the monolayer of fluoropolymer A is greater than that of the monolayer of fluoropolymer B. The existence ratio R(A) expressed by equation (1) and the existence ratio R(B) expressed by equation (2) satisfy the relationship expressed by equation (3). R(A)=MA(5) / MA(0) (1) R(B)=MB(5) / MB(0) (2) 50≥R(A) / R(B)≥5 (3) In equation (1), MA(5) represents the amount of the fluoropolymer A present at a position 5 nm along the thickness direction from one surface X of the optical anisotropic film, and MA(0) represents the amount of the fluoropolymer A present at surface X, wherein MA(0) represents a value greater than MA(5). In the formula (2), MB(5) represents the amount of the fluoropolymer B present at a position 5 nm along the thickness direction from the surface X, and MB(0) represents the amount of the fluoropolymer AB present at the surface X, wherein MB(0) represents a value greater than MB(5).

3. The optical anisotropic film according to claim 2, wherein, The fluoropolymer B has repeating units on its side chains containing at least one reactive group selected from the group consisting of acryloyl, methacryloyl, epoxy, and borate groups.

4. The optical anisotropic film according to claim 2 or 3, wherein, The fluoropolymer A has repeating units on its side chains containing at least one polar group selected from the group consisting of hydroxyl and carboxylic acid groups.

5. The optical anisotropic film according to claim 2 or 3, wherein, The optical anisotropic film is a positive C-plate or a negative C-plate.

6. The optical anisotropic film according to claim 2 or 3, wherein, Both the fluoropolymer A and the fluoropolymer B have repeating units comprising 1 to 20 alkyl groups on their side chains, with at least one hydrogen atom replaced by a fluorine atom. The number of carbon atoms in the alkyl group of the fluoropolymer A is less than the number of carbon atoms in the alkyl group of the fluoropolymer B.

7. The optical anisotropic film according to claim 6, wherein, The alkyl group in the fluoropolymer A has 4 or fewer carbon atoms.

8. The optical anisotropic film according to claim 2 or 3, wherein, The content of fluoropolymer A is greater than the content of fluoropolymer B.

9. An optical film having the optical anisotropic film as described in claim 2 or 3.

10. A polarizer having an optical anisotropic film as described in claim 2 or 3, and a polarizer.

11. An image display device having an optical anisotropic film as described in claim 2 or 3.

12. The optical anisotropic film according to claim 1, wherein, The liquid crystal composition contains a liquid crystal compound, a silicon-containing polymer C, and a silicon-containing polymer D. The surface energy of the single film of the silicon-containing polymer C is greater than that of the single film of the silicon polymer D. The existence ratio R(C) expressed by equation (4) and the existence ratio R(D) expressed by equation (5) satisfy the relationship expressed by equation (6). R(C)=MC(5) / MC(0) (4) R(D)=MD(5) / MD(0) (5) 50≥R(C) / R(D)≥5 (6) In equation (4), MC(5) represents the amount of silicon-containing polymer C present at a position 5 nm along the thickness direction from one surface X of the optical anisotropic film, and MC(0) represents the amount of silicon-containing polymer C present at surface X, wherein MC(0) represents a value greater than MC(5). In the formula (5), MD(5) represents the amount of the fluoropolymer B present at a position 5 nm along the thickness direction from the surface X, and MD(0) represents the amount of the fluoropolymer D present at the surface X, wherein MD(0) represents a value greater than MD(5).

13. The optical anisotropic film according to claim 12, wherein, The silicon-containing polymer D has repeating units on its side chains containing at least one reactive group selected from the group consisting of acryloyl, methacryloyl, epoxy, and borate groups.

14. The optical anisotropic film according to claim 12 or 13, wherein, The optical anisotropic film is a positive C-plate or a negative C-plate.

15. The optical anisotropic film according to claim 12 or 13, wherein, The content of the silicon-containing polymer C is greater than the content of the silicon-containing polymer D.

16. An optical film having the optical anisotropic film of claim 12 or 13.

17. A polarizer having an optical anisotropic film as described in claim 12 or 13, and a polarizer.

18. An image display device having an optical anisotropic film as described in claim 12 or 13.

Images