JP2019079072A - Optical anisotropic sheet for transfer - Google Patents

Abstract

To provide an optical anisotropic sheet for transfer that facilitates the transfer of an optical anisotropic film including a liquid crystal cured film.SOLUTION: There is provided an optical anisotropic sheet for transfer in which base material and liquid crystal cured film are laminated, where: the liquid crystal cured film is transferred from the base material to transfer target material through an active energy ray-curing adhesive; and, when transmissivity of the optical anisotropic sheet for transfer to a wavelength of 800 nm is defined as transmissivity of 100%, transmissivity T(390 nm), T(400 nm), and T(550 nm) of the an optical anisotropic sheet for transfer satisfy the following formulas (1) to (3). (1): 35%<T(390 nm)<45%, (2): 75%<T(400 nm)<85%, (3): 95%<T(550 nm)<100%.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an optically anisotropic sheet for transfer.

  In a flat panel display (FPD), a member including an optical film such as a polarizing plate or a retardation plate is used. As such an optical film, an optical film including a liquid crystal cured film formed of a polymerizable liquid crystal is known. Patent Document 1 describes an optical film including a liquid crystal cured film exhibiting reverse wavelength dispersion.

Japanese Patent Publication No. 2010-537955

  The conventional optical film is not easy to transfer the liquid crystal cured film.

The present invention includes the following inventions.
[1] An optically anisotropic sheet for transfer, in which a substrate and a cured liquid crystal film are laminated,
The liquid crystal cured film is transferred from the substrate to the transferred material through the active energy ray curing adhesive,
The transmittances T (390 nm), T (400 nm) and T (550 nm) of the optically anisotropic sheet for transfer when the transmittance of the optically anisotropic sheet for transfer at a wavelength of 800 nm is 100% are as follows: An optically anisotropic sheet for transfer which satisfies the formulas (1) to (3).
35% <T (390 nm) <45% (1)
75% <T (400 nm) <85% (2)
95% <T (550 nm) <100% (3)
[2] The optically anisotropic sheet for transfer as described in [1], wherein the liquid crystal cured film has wavelength dispersion characteristics satisfying the following formulas (4) and (5).
Re (450) / Re (550) ≦ 1.00 (4)
1.00 ≦ Re (650) / Re (550) (5)
Re (450), Re (550), and Re (650) represent in-plane retardation values for light of wavelengths 450 nm, 550 nm, and 650 nm, respectively.
[3] The optically anisotropic sheet for transfer according to [1] or [2], wherein the thickness of the liquid crystal cured film is 0.5 to 5 μm.
[4] An adhesive layer comprising an active energy ray-curable adhesive is formed on the surface of the cured liquid crystal film of the optically anisotropic sheet according to any one of [1] to [3], and a transfer target is formed thereon. A laminate obtained by removing the substrate of the optically anisotropic sheet after laminating the layers and irradiating active energy rays.
[5] of the active energy ray, the laminated body according to 1500 mJ / cm ² or less is the amount of irradiation energy 200 mJ / cm ² or more at a wavelength of 365 nm [4].
[6] The laminate according to [4] or [5], wherein the light source of active energy ray is a metal halide lamp.
[7] The laminate according to any one of [4] to [6], wherein the haze value of the laminate is 2% or less.
[8] A display device provided with the laminate according to any one of [4] to [7].

  The optically anisotropic sheet for transfer of the present invention facilitates the transfer of an optically anisotropic film containing a liquid crystal cured film.

It is a schematic diagram of the liquid crystal display device containing a liquid crystal cured film. It is a schematic diagram of the organic electroluminescence display containing the circularly-polarizing plate which has a liquid-crystal cured film.

<Optical anisotropic sheet for transfer>
The optically anisotropic sheet for transfer of the present invention is an optically anisotropic sheet for transfer in which a substrate and a cured liquid crystal film are laminated, and the transmittance when the transmittance for a wavelength of 800 nm is 100%. T (390 nm), T (400 nm) and T (550 nm) satisfy the following formulas (1) to (3).
35% <T (390 nm) <45% (1)
75% <T (400 nm) <85% (2)
95% <T (550 nm) <100% (3)

By the transmittance | permeability of the optically anisotropic sheet for transfer satisfy | filling said Formula (1)-(3), transfer of a liquid-crystal cured film becomes easy, and it becomes possible to transfer a liquid-crystal cured film with few defects.
T (390 nm) is preferably 36 to 44%, more preferably 36 to 43%. T (400 nm) is preferably 76 to 84%, more preferably 76 to 83%. T (550 nm) is preferably 96 to 99.9%, more preferably 98 to 99%.

  In order to make the transmittance of the optically anisotropic sheet for transfer within the above range, the absorption wavelength of the polymerizable liquid crystal compound to be described later and the type of the polymerization initiator are selected, and the composition does not generate absorption in the visible region. Furthermore, the thickness of the liquid crystal cured film may be adjusted.

Hardened film of liquid crystal
In the liquid crystal cured film, a composition containing a polymerizable liquid crystal compound (hereinafter sometimes referred to as a composition for forming a liquid crystal cured film) is usually coated on a substrate or on an alignment film formed on the substrate. Obtained by polymerizing a polymerizable liquid crystal compound.

  The liquid crystal cured film is a film having a thickness of 5 μm or less cured in a state in which the polymerizable liquid crystal compound is oriented, and preferably a film cured in a state in which the polymerizable liquid crystal compound is oriented horizontally to the substrate surface. is there.

  The thickness of the liquid crystal cured film is preferably in the range of 0.5 to 5 μm, and more preferably in the range of 1 to 3 μm. The thickness of the liquid crystal cured film can be measured by an interference film thickness meter, a laser microscope or a stylus film thickness meter.

In the liquid crystal cured film, it is preferable that the front retardation value Re (λ) for light of wavelength λ nm satisfy the equations (4) and (5), and the equations (4), (5) and (6) It is more preferable to satisfy.
It is preferable that the liquid crystal cured film satisfy the formula (4).
Re (450) / Re 550) ≦ 1.00 (4)
1.00 ≦ Re (650) / Re (550) (5)
100 <Re (550) <150 (6)
[Wherein, Re (450), Re (550), and Re (650) represent front retardation values at wavelengths of 450 nm, 550 nm, and 650 nm, respectively. ]
nz> nx ≒ ny (7)
[Wherein, nz represents the refractive index in the thickness direction. nx represents the refractive index in the direction that produces the largest refractive index in the plane. ny represents the refractive index in the direction orthogonal to the direction of nx in the plane]

The front retardation value of the liquid crystal cured film can be adjusted by the thickness of the liquid crystal cured film. Since the front retardation value is determined by the equation (50), in order to obtain a desired front retardation value (Re (λ)), Δn (λ) and the film thickness d may be adjusted.
Re (λ) = d × Δn (λ) (50)
In the formula, Re (λ) represents a front retardation value at a wavelength λ nm, d represents a film thickness, and Δn (λ) represents a birefringence at a wavelength λ nm.

  The birefringence Δn (λ) is obtained by measuring the front retardation value and dividing by the thickness of the liquid crystal cured film. Although a specific measurement method is shown in the examples, in this case, a substantial liquid crystal can be obtained by measuring a film formed on a substrate having no in-plane retardation on the substrate itself like a glass substrate. Properties of the cured film can be measured.

  The Re (550) of the liquid crystal cured film satisfying the formula (7) is preferably 0 to 10 nm, and more preferably 0 to 5 nm. The thickness direction retardation value Rth is preferably -10 to -300 nm, more preferably -20 to -200 nm. A liquid crystal effect film satisfying the formula (7) and having Re (550) and Rth in the above range is particularly suitable for compensation of an in-plane switching (IPS) mode liquid crystal display.

Rth can be calculated from the phase difference value R ₄₀ measured at an inclination angle of 40 degrees with the in-plane fast axis as the inclination axis and the in-plane phase difference value R ₀ . That is, Rth is an in-plane retardation value R ₀ , a retardation value R ₄₀ measured by inclining at 40 degrees with the fast axis as the inclination axis, a thickness d of the liquid crystal cured film, and an average refractive index n of the liquid crystal cured film _{From 0} , nx, ny and nz can be determined by equations (9) to (11), and these can be substituted into equation (8) for calculation.

Rth = [(nx + ny) / 2-nz] × d (8)
R ₀ = (nx−ny) × d (9)
R ₄₀ = (nx−ny ′) × d / cos (φ) (10)
(nx + ny + nz) / 3 = n ₀ (11)
here,
φ = sin ⁻¹ [sin (40 °) / n ₀ ]
ny '= ny × nz / [ny ² × sin ² (φ) + nz ² × cos ² (φ)] ^1/2

The polymerizable liquid crystal compound is a compound having a polymerizable group and having liquid crystallinity. The polymerizable group means a group involved in the polymerization reaction, and is preferably a photopolymerizable group. Here, the photopolymerizable group refers to a group capable of participating in the polymerization reaction by active radicals or acids generated from the photopolymerization initiator.
Examples of the polymerizable group include vinyl group, vinyloxy group, 1-chlorovinyl group, isopropenyl group, 4-vinylphenyl group, acryloyloxy group, methacryloyloxy group and the like. Among them, an acryloyloxy group, a methacryloyloxy group and a vinyloxy group are preferable, and an acryloyloxy group is more preferable. The liquid crystallinity may be a thermotropic liquid crystal or a lyotropic liquid crystal, and may be a nematic liquid crystal or a smectic liquid crystal in the thermotropic liquid crystal. Thermotropic nematic liquid crystals are preferred from the viewpoint of easiness of production.

<Polymerizable liquid crystal compound>
Examples of the polymerizable liquid crystal compound include a compound represented by the formula (A) (hereinafter sometimes referred to as a compound (A)) and the like. The polymerizable liquid crystal compounds may be used alone or in combination.

［式中、Ｘ^１は、酸素原子、硫黄原子又は−ＮＲ^１−を表わす。Ｒ^１は、水素原子又は炭素数１〜４のアルキル基を表わす。
Ｙ^１は、置換基を有していてもよい炭素数６〜１２の１価の芳香族炭化水素基又は置換基を有していてもよい炭素数３〜１２の１価の芳香族複素環式基を表わす。
Ｑ^３及びＱ^４は、それぞれ独立に、水素原子、置換基を有していてもよい炭素数１〜２０の１価の脂肪族炭化水素基、炭素数３〜２０の１価の脂環式炭化水素基、置換基を有していてもよい炭素数６〜２０の１価の芳香族炭化水素基、ハロゲン原子、シアノ基、ニトロ基、−ＮＲ^２Ｒ^３又は−ＳＲ^２を表わすか、或いは、Ｑ^３とＱ^４とが互いに結合して、これらが結合する炭素原子とともに芳香環又は芳香族複素環を形成する。Ｒ^２及びＲ^３は、それぞれ独立に、水素原子又は炭素数１〜６のアルキル基を表わす。
Ｄ^１及びＤ^２は、それぞれ独立に、単結合、−Ｃ（＝Ｏ）−Ｏ−、−Ｃ（＝Ｓ）−Ｏ−、−ＣＲ^４Ｒ^５−、−ＣＲ^４Ｒ^５−ＣＲ^６Ｒ^７−、−Ｏ−ＣＲ^４Ｒ^５−、−ＣＲ^４Ｒ^５−Ｏ−ＣＲ^６Ｒ^７−、−ＣＯ−Ｏ−ＣＲ^４Ｒ^５−、−Ｏ−ＣＯ−ＣＲ^４Ｒ^５−、−ＣＲ^４Ｒ^５−Ｏ−ＣＯ−ＣＲ^６Ｒ^７−、−ＣＲ^４Ｒ^５−ＣＯ−Ｏ−ＣＲ^６Ｒ^７−、−ＮＲ^４−ＣＲ^５Ｒ^６−又は−ＣＯ−ＮＲ^４−を表わす。
Ｒ^４、Ｒ^５、Ｒ^６及びＲ^７は、それぞれ独立に、水素原子、フッ素原子又は炭素数１〜４のアルキル基を表わす。
Ｇ^１及びＧ^２は、それぞれ独立に、炭素数５〜８の２価の脂環式炭化水素基を表わし、該脂環式炭化水素基を構成するメチレン基は、酸素原子、硫黄原子又は−ＮＨ−に置き換っていてもよく、該脂環式炭化水素基を構成するメチン基は、第三級窒素原子に置き換っていてもよい。
Ｌ^１及びＬ^２は、それぞれ独立に、１価の有機基を表わし、Ｌ^１及びＬ^２のうちの少なくとも一つは、重合性基を有する。］

[Wherein, X ¹ represents an oxygen atom, a sulfur atom or -NR ^1- . R ¹ represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms.
Y ¹ is a C6-C12 monovalent aromatic hydrocarbon group which may have a substituent, or a C3-C12 monovalent aromatic heterocycle which may have a substituent Represents a formula group.
Q ³ and Q ⁴ each independently represent a hydrogen atom, a monovalent aliphatic hydrocarbon group having 1 to 20 carbon atoms which may have a substituent, or a monovalent alicyclic hydrocarbon having 3 to 20 carbon atoms A hydrocarbon group, a monovalent aromatic hydrocarbon group having 6 to 20 carbon atoms which may have a substituent, a halogen atom, a cyano group, a nitro group, -NR ² R ³ or -SR ² , or Alternatively, Q ³ and Q ⁴ bond to each other to form an aromatic ring or heteroaromatic ring with the carbon atom to which they are bonded. R ² and ^{R 3} each independently represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
D ¹ and D ² are each independently a single bond, —C (= O) —O—, —C (= S) —O—, —CR ⁴ R ⁵ —, —CR ⁴ R ⁵ — CR ⁶ R ^{7 -, - O-CR 4} R 5 -, - CR 4 R 5 -O-CR 6 R 7 -, - CO-O-CR 4 R 5 -, - O-CO-CR 4 R 5 -, - CR ^{4 R 5 -O-CO-CR} 6 R 7 -, - CR 4 R 5 -CO-O-CR 6 R 7 -, - NR 4 -CR 5 R 6 - or -CO-NR ⁴ - represents a.
Each of R ⁴ , R ⁵ , R ⁶ and R ⁷ independently represents a hydrogen atom, a fluorine atom or an alkyl group having 1 to 4 carbon atoms.
G ¹ and G ² each independently represent a divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and the methylene group constituting the alicyclic hydrocarbon group is an oxygen atom, a sulfur atom or It may be substituted by NH-, and the methine group which comprises this alicyclic hydrocarbon group may be substituted by the tertiary nitrogen atom.
L ¹ and L ² each independently represent a monovalent organic group, and at least one of L ¹ and L ² has a polymerizable group. ]

L ¹ in the compound (A) is preferably a group represented by formula (A1), and L ² is preferably a group represented by formula (A2).
P ¹ -F ^1- (B ¹ -A ¹ ) _k -E ^1- (A 1)
P ² -F ^2- (B ² -A ² ) ₁ -E ^2- (A 2)
^{Wherein, B 1, B 2, E} 1 and ^{E 2,} each _{^{independently, -CR 4 R 5 -, -}} CH 2 -CH 2 -, - O -, - S -, - CO-O-, -O-CO-O -, - CS-O -, - O-CS-O -, - CO-NR 1 -, - O-CH 2 -, - S-CH 2 - or a single bond.
A ¹ and A ² each independently represent a divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms or a divalent aromatic hydrocarbon group having 6 to 18 carbon atoms, and the alicyclic hydrocarbon The methylene group constituting the group may be replaced by an oxygen atom, a sulfur atom or -NH-, and the methine group constituting the alicyclic hydrocarbon group is replaced by a tertiary nitrogen atom May be
k and l each independently represent an integer of 0 to 3;
F ¹ and F ² each independently represent a divalent aliphatic hydrocarbon group having 1 to 12 carbon atoms.
P ¹ represents a polymerizable group.
P ² represents a hydrogen atom or a polymerizable group.
R ⁴ and R ⁵ each independently represent a hydrogen atom, a fluorine atom or an alkyl group having 1 to 4 carbon atoms. ]

  As a preferable compound (A), the polymeric liquid crystal compound of Unexamined-Japanese-Patent No. 2011-207765 is mentioned.

Moreover, as a polymeric liquid crystal compound, the compound (Hereafter, it may be mentioned "compound (X)") etc. which contain group represented by Formula (X) are mentioned.

^{P 11 -B 11 -E 11 -B 12} -A 11 -B 13 - (X)
[Wherein, P ¹¹ represents a polymerizable group.
A ¹¹ represents a divalent alicyclic hydrocarbon group or a divalent aromatic hydrocarbon group. The hydrogen atom contained in the divalent alicyclic hydrocarbon group and the divalent aromatic hydrocarbon group is a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, a cyano group or a nitro The hydrogen atom contained in the alkyl group having 1 to 6 carbon atoms and the alkoxy group having 1 to 6 carbon atoms may be substituted with a fluorine atom.
B ¹¹ is, -O -, - S -, - CO-O -, - O-CO -, - O-CO-O -, - CO-NR 16 -, - NR 16 -CO -, - CO-, -CS- or represents a single bond. R ¹⁶ represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
B ¹² and ^{B 13} are each _{independently, -C≡C -, - CH = CH} -, - CH 2 -CH 2 -, - O -, - S -, - C (= O) -, - C ( OO) -O-, -O-C (= O)-, -O-C (= O) -O-, -CH = N-, -N = CH-, -N = N-, -C ( _{^{= O) -NR 16 -, -}} NR 16 -C (= O) -, - OCH 2 -, - OCF 2 -, - CH 2 O -, - CF 2 O -, - CH = CH-C (= O And —O—, —O—C (= O) —CH = CH— or a single bond.
E ¹¹ represents an alkanediyl group having 1 to 12 carbon atoms, and a hydrogen atom contained in the alkanediyl group may be substituted with an alkoxy group having 1 to 5 carbon atoms; hydrogen contained in the alkoxy group The atom may be substituted by a halogen atom. -CH ₂ constituting the alkanediyl group - may be replaced by -O- or -CO-. ]

  Specific examples of the polymerizable liquid crystal compound include “3.8.6 Network (completely cross-linked type)” in “Liquid Crystal Handbook” (edited by the LCD Handbook Editorial Committee, Maruzen Inc., published on October 30, 2000), .5.1 Liquid Crystal Materials b. Compounds Having a Polymerizable Group Among the Compounds Described in the Polymerizable Nematic Liquid Crystal Material ", JP-A-2010-31223, JP-A-2010-270108, JP-A-2011 And polymerizable liquid crystal compounds described in JP-A-6360 and JP-A-2011-207765.

  When the liquid crystal cured film satisfies the formula (7), the liquid crystal alignment of the polymerizable liquid crystal compound forming the liquid crystal cured film is preferably vertical alignment. In order to vertically align the polymerizable liquid crystal compound, it is preferable to use an alignment film having a nonpolar substituent consisting of a silicon atom, a fluorine atom or the like, and examples of the alignment film include Japanese Patent No. 4605016 and Japanese Patent No. 4985906, A material generally used as a liquid crystal alignment film of a vertical alignment type liquid crystal display element as described in Japanese Patent No. 4502119 and WO2008 / 117760 can be used.

  The content of the polymerizable liquid crystal compound is usually 70 to 99.5 parts by mass, preferably 80 to 99 parts by mass, and more preferably 100 parts by mass of the solid content of the composition for forming a liquid crystal cured film. It is 80 to 94 parts by mass, more preferably 80 to 90 parts by mass. Within the above range, the orientation tends to be high. Here, solid content means the thing of the total amount of the component except the solvent from the composition for liquid-crystal cured film formation.

  The composition for liquid crystal cured film formation may contain a solvent, a polymerization initiator, a sensitizer, a polymerization inhibitor and a leveling agent.

<Solvent>
The solvent is preferably one that can completely dissolve the polymerizable liquid crystal compound, and is preferably a solvent inert to the polymerization reaction of the polymerizable liquid crystal compound.
As the solvent, alcohol solvents such as methanol, ethanol, ethylene glycol, isopropyl alcohol, propylene glycol, ethylene glycol methyl ether, ethylene glycol butyl ether and propylene glycol monomethyl ether; ethyl acetate, butyl acetate, ethylene glycol methyl ether acetate, γ-butyrolactone Or ester solvents such as propylene glycol methyl ether acetate and ethyl lactate; ketone solvents such as acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, 2-heptanone and methyl isobutyl ketone; aliphatic hydrocarbon solvents such as pentane, hexane and heptane; And aromatic hydrocarbon solvents such as xylene, nitrile solvents such as acetonitrile; tetrahydrofuran And ether solvents such as dimethoxyethane; chlorine-containing solvent of chloroform and chlorobenzene; and the like. These solvents may be used alone or in combination.

  The content of the solvent is preferably 50 to 98 parts by mass with respect to 100 parts by mass of the composition for forming a liquid crystal cured film. The solid content of the composition for forming a liquid crystal cured film is preferably 2 to 50 parts by mass with respect to 100 parts by mass of the composition for forming a liquid crystal cured film. When the solid content is 50 parts by mass or less, the viscosity of the composition for forming a cured liquid crystal film is lowered, and the thickness of the cured liquid crystal film becomes substantially uniform, which tends to make unevenness in the cured liquid crystal film less likely to occur. is there. The solid content can be determined in consideration of the thickness of the liquid crystal cured film to be produced.

<Polymerization initiator>
The polymerization initiator is a compound capable of initiating a polymerization reaction such as a polymerizable liquid crystal compound. As the polymerization initiator, a photopolymerization initiator that generates active radicals by the action of light is preferable.

  Examples of the polymerization initiator include benzoin compounds, benzophenone compounds, alkylphenone compounds, acyl phosphine oxide compounds, triazine compounds, iodonium salts and sulfonium salts.

  Examples of the benzoin compound include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether and benzoin isobutyl ether.

  As a benzophenone compound, benzophenone, methyl o-benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4'-methyldiphenyl sulfide, 3,3 ', 4,4'-tetra (tert-butylperoxycarbonyl) benzophenone And 2,4,6-trimethylbenzophenone and the like.

  As the alkyl phenone compound, diethoxyacetophenone, 2-methyl-2-morpholino-1- (4-methylthiophenyl) propan-1-one, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butane -1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one, 1,2-diphenyl-2,2-dimethoxyethane-1-one, 2-hydroxy-2-methyl-1- [1 4- (2-hydroxyethoxy) phenyl] propan-1-one, 1-hydroxycyclohexyl phenyl ketone and 2-hydroxy-2-methyl-1- [4- (1-methylvinyl) phenyl] propan-1-one Oligomers etc. are mentioned.

  Examples of the acyl phosphine oxide compound include 2,4,6-trimethyl benzoyl diphenyl phosphine oxide and bis (2,4,6-trimethyl benzoyl) phenyl phosphine oxide.

  As a triazine compound, 2,4-bis (trichloromethyl) -6- (4-methoxyphenyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- (4-methoxynaphthyl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- (4-methoxystyryl) -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2 -(5-Methylfuran-2-yl) ethenyl] -1,3,5-triazine, 2,4-bis (trichloromethyl) -6- [2- (furan-2-yl) ethenyl] -1,3 5-triazine, 2,4-bis (trichloromethyl) -6- [2- (4-diethylamino-2-methylphenyl) ethenyl] -1,3,5-triazine and 2,4-bis (trichloromethyl) -6-[2 (3,4-dimethoxyphenyl) ethenyl] -1,3,5-triazine.

  As commercially available polymerization initiators, “Irgacure (registered trademark) 907”, “Irgacure (registered trademark) 184”, “Irgacure (registered trademark) 651”, “Irgacure (registered trademark) 819”, “Irgacure ( "250", "IRGACURE (registered trademark) 369" (Ciba Japan Co., Ltd.), "SEIKOL (registered trademark) BZ", "SEIKOL (registered trademark) Z", "SEIKOL (registered trademark) BEE" ( SEIKO CHEMICAL CO., LTD .; "Kayacure (registered trademark) BP 100" (Nippon Kayaku Co., Ltd.); "Kayacure (registered trademark) UVI-6992" (manufactured by Dow); "Adeka Optomer SP-152 "," Adeka Optomer SP-170 "(ADEKA Corporation);" TAZ-A "," TAZ-PP "(day Siber Hegner Ltd.); and "TAZ-104" (Sanwa Chemical Co., Ltd.).

  The content of the polymerization initiator is usually 0.1 to 30 parts by mass, preferably 0.5 to 10 parts by mass, more preferably 0.5 to 10 parts by mass with respect to 100 parts by mass of the polymerizable liquid crystal compound. 8 parts by mass. If the content of the polymerization initiator is within this range, it is preferable because the alignment of the polymerizable liquid crystal compound is not disturbed.

<Sensitizer>
According to the sensitizer, the polymerization reaction of the polymerizable liquid crystal compound can be further promoted.
As a sensitizer, a photosensitizer is preferable. As sensitizers, xanthone compounds such as xanthone and thioxanthone (2,4-diethylthioxanthone, 2-isopropylthioxanthone etc.); anthracene compounds such as anthracene and alkoxy group-containing anthracene (dibutoxyanthracene etc); phenothiazine and rubrene etc. It can be mentioned.
0.1-30 mass parts is preferable with respect to 100 mass parts of polymeric liquid crystal compounds, as for content of a sensitizer, 0.5-10 mass parts is more preferable, and 0.5-8 mass parts is further more preferable. .

<Polymerization inhibitor>
According to the polymerization inhibitor, the progress degree of the polymerization reaction of the polymerizable liquid crystal compound can be controlled.
As a polymerization inhibitor, radical scavengers, such as a phenol type compound, a sulfur type compound, and a phosphorus type compound, are mentioned.

  Examples of phenolic compounds include 2,6-di-tert-butyl-4-methylphenol, 2,6-di-tert-butyl-4-ethylphenol, butyl hydroxyanisole, hydroquinone, alkoxy group-containing hydroquinone, and alkoxy group-containing Catechol (eg, butyl catechol and the like), pyrogallol and the like. Alternatively, a commercially available product may be used, for example, Sumilizer (registered trademark) BHT (2,6-di-t-butyl-4-methylphenol), Sumylizer GM (2-tert-butyl-6- (3-) tert-Butyl-2-hydroxy-5-methylbenzyl) -4-methylphenyl acrylate), Sumylizer GS (F) (2- [1- (2-hydroxy-3,5-di-tert-pentylphenyl) ethyl] -4,6-di-tert-pentylphenyl acrylate), Sumylizer GA-80 (3,9-bis [2- [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy]- 1,1-Dimethylethyl] -2,4,8,10-tetraoxaspiro [5.5] undecane) (all available from Sumitomo Chemical Co., Ltd.) etc.

  As sulfur-based compounds, dialkylthiodipropionates such as dilaurylthiodipropionate, dimyristylthiodipropionate, distearylthiodipropionate, etc .; and commercially available Sumilizer TPL-R (dilauryl-3,3′- Thiodipropionate), Sumylizer TPM (dimyristyl-3,3'-thiodipropionate) (all manufactured by Sumitomo Chemical Co., Ltd.), etc. may be mentioned.

As a phosphorus compound, trioctyl phosphite, trilauryl phosphite, tridecyl phosphite, (octyl) diphenyl phosphite; commercially available Sumilizer GP (6- [3- (3-tert-butyl-4-hydroxy) -5-Methylphenyl) propoxy] -2,4,8,10-tetra-tert-butyl-dibenzo [d, f] [1,3,2] dioxaphosphepin (manufactured by Sumitomo Chemical Co., Ltd.) Etc.
As a polymerization inhibitor, a phenol compound is preferable in that the coloration of the liquid crystal cured film is small.

  The content of the polymerization inhibitor is preferably 0.1 to 30 parts by mass, more preferably 0.5 to 10 parts by mass, and still more preferably 0.5 to 8 parts by mass with respect to 100 parts by mass of the polymerizable liquid crystal. If it is in the said range, it can polymerize, without disturbing the orientation of a polymeric liquid crystal. The polymerization inhibitors may be used alone or in combination of two or more.

<Leveling agent>
The leveling agent has the function of adjusting the flowability of the composition for forming a liquid crystal cured film and making the film obtained by applying the composition for forming a liquid crystal cured film flatter, and the surfactant is exemplified. Be As a preferable leveling agent, the leveling agent which has a polyacrylate compound as a main component, and the leveling agent which has a fluorine atom containing compound as a main component are mentioned.

  As a leveling agent which has a polyacrylate compound as a main component, "BYK-350", "BYK-352", "BYK-353", "BYK-354", "BYK-355", "BYK-358N", " BYK-361N "," BYK-380 "," BYK-381 "and" BYK-392 "[BYK Chemie] and the like.

  As a leveling agent which has a fluorine atom containing compound as a main component, "Megafuck (registered trademark) R-08", "R-30", "R-90", "F-410", "F" -411 "," F-443 "," F-445 "," F-470 "," F-471 "," F-477 "," F-479 ", and" F- " 482 "and" F-483 "[DIC Corporation];" Surflon (registered trademark) S-381 "," S-382 "," S-383 ", and" S-393 "," the same " SC-101 "," SC-105 "," KH-40 "and" SA-100 "(AGC Seimi Chemical Co., Ltd.);" E1830 "," E5844 "[Daikin Fine Chemical Research Institute]; F-top EF301 "," EF303 "," EF351 "and" EF " 52 "[Mitsubishi Materials Electronic Chemicals Co., Ltd.], and the like.

  0.01-5 mass parts is preferable with respect to 100 mass parts of polymeric liquid crystal compounds, and, as for content of a leveling agent, 0.1-3 mass parts is more preferable. Within the above range, it is easy to horizontally align the polymerizable liquid crystal compound, and the resulting liquid crystal cured film tends to be smoother, which is preferable. The composition for liquid crystal cured film formation may contain two or more types of leveling agents.

<Base material>
The substrate includes a glass substrate and a plastic substrate, preferably a plastic substrate. Plastics constituting the plastic substrate include polyolefins such as polyethylene, polypropylene and norbornene polymers; cyclic olefin resins; polyvinyl alcohol; polyethylene terephthalate; polymethacrylates; polyacrylates; triacetylcellulose, diacetylcellulose and cellulose Cellulose esters such as acetate propionate; polyethylene naphthalate; polycarbonates; polysulfones; polyethersulfones; polyether ketones; plastics such as polyphenylene sulfides and polyphenylene oxides. Preferably, it is a cellulose ester, cyclic olefin resin, polycarbonate, polyethylene terephthalate or polymethacrylic acid ester.

  The cellulose ester is obtained by esterifying at least a part of hydroxyl groups contained in cellulose and can be easily obtained from the market. Cellulose ester substrates are also readily available from the market. Examples of commercially available cellulose ester substrates include "Fujitack Film" (Fuji Photo Film Co., Ltd.); "KC8UX2M", "KC8UY" and "KC4UY" (Konica Minolta Opto Co., Ltd.).

  The cyclic olefin resin is composed of a polymer or copolymer (cyclic olefin resin) of cyclic olefin such as norbornene or polycyclic norbornene monomer, and the cyclic olefin resin is partially opened. You may include a part. What hydrogenated the cyclic olefin resin containing a ring-opening part may be used. Furthermore, the cyclic olefin resin is a copolymer of a cyclic olefin and a chain olefin or a vinylated aromatic compound (such as styrene) in that the transparency is not significantly impaired and the hygroscopicity is not significantly increased. It may be. A polar group may be introduced into the molecule of the cyclic olefin resin.

  When the cyclic olefin resin is a copolymer of a cyclic olefin and an aromatic compound having a chain olefin or a vinyl group, the content of structural units derived from the cyclic olefin is the total structural unit of the copolymer. On the other hand, it is usually at most 50 mol%, preferably in the range of 15 to 50 mol%. The chain olefins include ethylene and propylene, and the aromatic compounds having a vinyl group include styrene, α-methylstyrene and alkyl-substituted styrene. When the cyclic olefin resin is a ternary copolymer of a cyclic olefin, a chain olefin, and an aromatic compound having a vinyl group, the content of structural units derived from the chain olefin is that of the copolymer The content of structural units derived from an aromatic compound having a vinyl group is usually 5 to 80 mol% based on the total structural units, and is usually 5 to 80 mol% based on the total structural units of the copolymer It is. Such terpolymers have the advantage of being able to use relatively low amounts of expensive cyclic olefins in their preparation.

  As commercially available cyclic olefin resins, "Topas" (registered trademark) (Ticona (Germany)), "Arton" (registered trademark) (JSR Corporation), "ZEONOR" (registered trademark) (Japan) Zeon Co., Ltd., "ZEONEX" (registered trademark) (Nippon Zeon Co., Ltd.), and "APEL" (registered trademark) (manufactured by Mitsui Chemicals, Inc.) can be mentioned. Such cyclic olefin-based resin can be formed into a film by a known means such as a solvent casting method, a melt extrusion method or the like to make a substrate. A commercially available cyclic olefin-based resin substrate can also be used. As a commercially available cyclic olefin resin base material, "ESSINA" (registered trademark) [Sekisui Chemical Co., Ltd.], "SCA 40" (registered trademark) [Sekisui Chemical Co., Ltd.], "ZEONOR Film" (registered trademark) And the like) and “Arton Film” (registered trademark) [JSR Corporation].

  The thickness of the substrate is preferably thin in that it is a weight that allows practical handling, but if it is too thin, the strength tends to decrease and the processability tends to be poor. The thickness of the substrate is usually 5 to 300 μm, preferably 20 to 200 μm.

<Alignment film>
The alignment film is usually a film made of a polymer compound and having a thickness of 500 nm or less, and has an alignment regulating power to align the polymerizable liquid crystal compound in a desired direction.
The alignment film facilitates the liquid crystal alignment of the polymerizable liquid crystal compound. The state of liquid crystal alignment such as horizontal alignment, vertical alignment, hybrid alignment, and tilt alignment changes depending on the properties of the alignment film and the polymerizable liquid crystal compound, and the combination thereof can be arbitrarily selected. The polymerizable liquid crystal compound can form horizontal alignment or hybrid alignment if the alignment film is a material that expresses horizontal alignment as alignment regulating force, and the polymerizable liquid crystal compound is vertical if it is a material that expresses vertical alignment. Orientation or tilt orientation can be formed. Expressions such as horizontal and vertical indicate the direction of the major axis of the aligned polymerizable liquid crystal compound, based on the liquid crystal cured film plane. The vertical alignment is to have the major axis of the aligned polymerizable liquid crystal compound in the direction perpendicular to the liquid crystal cured film plane. The term "perpendicular" as used herein means 90 ° ± 20 ° with respect to the liquid crystal cured film plane.
The alignment control force can be arbitrarily adjusted depending on the surface state and rubbing conditions when the alignment film layer is formed of an alignment polymer, and when it is formed of a photoalignment polymer, it is possible to use polarized irradiation. It is possible to adjust arbitrarily according to conditions and the like. The liquid crystal alignment can also be controlled by selecting physical properties such as surface tension and liquid crystallinity of the polymerizable liquid crystal compound.

  The alignment film formed between the substrate and the cured liquid crystal film is insoluble in the solvent used when forming the cured liquid crystal film on the alignment film, and heating for removal of the solvent and alignment of the liquid crystal Those having heat resistance in processing are preferred. Examples of the alignment film include an alignment film made of an alignment polymer, a photo alignment film, a glue alignment film, and the like.

  The thickness of the alignment film is usually in the range of 10 to 500 nm, preferably in the range of 10 to 200 nm.

<Alignment film made of alignment polymer>
Examples of orientation polymers include polyamides and gelatins having an amide bond in the molecule, polyamic acid which is a polyimide having an imide bond in the molecule and its hydrolyzate, polyvinyl alcohol, alkyl-modified polyvinyl alcohol, polyacrylamide, polyoxazole, Examples thereof include polyethylene imine, polystyrene, polyvinyl pyrrolidone, polyacrylic acid and polyacrylic acid esters, and polyvinyl alcohol is preferable. These orientable polymers may be used alone or in combination.

  In an alignment film made of an alignment polymer, a composition in which the alignment polymer is dissolved in a solvent (hereinafter sometimes referred to as an alignment polymer composition) is usually applied to a substrate to remove the solvent, or alignment Is obtained by applying the base polymer composition to a substrate, removing the solvent and rubbing (rubbing method).

  Examples of the solvent include water; alcohol solvents such as methanol, ethanol, ethylene glycol, isopropyl alcohol, propylene glycol, methyl cellosolve, butyl cellosolve and propylene glycol monomethyl ether; ethyl acetate, butyl acetate, ethylene glycol methyl ether acetate, γ-butyrolactone, propylene Ester solvents such as glycol methyl ether acetate and ethyl lactate; Ketone solvents such as acetone, methyl ethyl ketone, cyclopentanone, cyclohexanone, cyclohexanone, methyl amyl ketone and methyl isobutyl ketone; aliphatic hydrocarbon solvents such as pentane, hexane and heptane; toluene and xylene Aromatic hydrocarbon solvents such as, Nitrile solvents such as acetonitrile; Tetrahydrofuran and dimethoxyethane etc Ether solvent; chloroform, and chlorine-substituted hydrocarbon solvent such as chlorobenzene; and the like. These solvents may be used alone or in combination.

  The concentration of the orienting polymer in the orientating polymer composition may be in the range in which the orienting polymer material can be completely dissolved in the solvent, but preferably 0.1 to 20% in terms of solid content with respect to the solution 1 to 10% is more preferable.

  Examples of commercially available oriented polymer compositions include Sun Ever (registered trademark, manufactured by Nissan Chemical Industries, Ltd.) or Optomer (registered trademark, manufactured by JSR Corporation).

  As a method of applying the oriented polymer composition to a substrate, coating methods such as spin coating method, extrusion method, gravure coating method, die coating method, bar coating method and applicator method, printing such as flexo method Known methods such as law

  By removing the solvent contained in the orientable polymer composition, a dry film of the orientable polymer is formed. As a method of removing the solvent, a natural drying method, a ventilation drying method, a heat drying method, a reduced pressure drying method and the like can be mentioned.

  As a method of rubbing, a film of an oriented polymer formed on the surface of a substrate by applying the oriented polymer composition to a substrate and annealing it on a rotating rubbing roll on which a rubbing cloth is wound, The method of making it contact can be mentioned.

<Photo alignment film>
In the photoalignment film, a composition containing a polymer or monomer having a photoreactive group and a solvent (hereinafter sometimes referred to as a “composition for forming a photoalignment film”) is applied to a substrate, and polarized ( Preferably, it is obtained by irradiating polarized UV). The photo alignment film is more preferable in that the direction of the alignment control force can be arbitrarily controlled by selecting the polarization direction of the polarized light to be irradiated.

  The photoreactive group refers to a group that generates liquid crystal alignment ability by irradiating light. Specifically, it generates a photoreaction that is the source of liquid crystal alignment ability, such as alignment induction or isomerization reaction of molecules generated by light irradiation, dimerization reaction, photocrosslinking reaction, or photolysis reaction. is there. Among the photoreactive groups, those capable of causing a dimerization reaction or a photocrosslinking reaction are preferable in that they are excellent in orientation. The photoreactive group capable of causing the above reaction is preferably one having an unsaturated bond, particularly a double bond, a carbon-carbon double bond (CCC bond), a carbon-nitrogen double bond (C = N bond) Particularly preferred is a group having at least one selected from the group consisting of nitrogen-nitrogen double bond (N = N bond) and carbon-oxygen double bond (C = O bond).

  Examples of the photoreactive group having a C = C bond include a vinyl group, a polyene group, a stilbene group, a stilbazole group, a stilbazolium group, a chalcone group and a cinnamoyl group. Examples of photoreactive groups having a C = N bond include groups having structures such as aromatic Schiff bases and aromatic hydrazones. Examples of the photoreactive group having an N = N bond include an azobenzene group, an azonaphthalene group, an aromatic heterocyclic azo group, a bisazo group, a formazan group and the like, and a group having an azoxybenzene as a basic structure. Examples of photoreactive groups having a C = O bond include benzophenone, coumarin, anthraquinone and maleimide groups. These groups may have a substituent such as an alkyl group, an alkoxy group, an aryl group, an allyloxy group, a cyano group, an alkoxycarbonyl group, a hydroxyl group, a sulfonic acid group and a halogenated alkyl group.

  Among them, a photoreactive group involved in the photodimerization reaction is preferable, the amount of polarized light necessary for photoalignment is relatively small, and a photoalignment layer having excellent thermal stability and temporal stability is easily obtained. Cinnamoyl and chalcone are preferred. As the polymer having a photoreactive group, those having a cinnamoyl group which has a cinnamic acid structure at the end of the polymer side chain are particularly preferable.

  As the solvent of the composition for forming a photoalignment film, those capable of dissolving a polymer having a photoreactive group and a monomer are preferable, and examples of the solvent include the solvents mentioned as the solvent of the alignment polymer composition.

  0.2 mass% or more is preferable, and, as for content of the polymer or monomer which has a photoreactive group with respect to the composition for photo alignment film formation, the range of 0.3-10 mass% is especially preferable. A polymeric material such as polyvinyl alcohol or polyimide or a photosensitizer may be contained within the range that the characteristics of the photo alignment film are not significantly impaired.

  As a method of apply | coating the composition for photo-alignment film formation to a base material, the method similar to the method of apply | coating an oriented polymer composition to a base material is mentioned. The method for removing the solvent from the composition for forming a photo alignment film may be the same method as the method for removing the solvent from the alignment polymer composition.

  In order to irradiate polarized light, the composition for forming a photo alignment film coated on a substrate is directly irradiated with polarized light from the substrate side even if it is irradiated with polarized light, and the polarized light is transmitted. It may be in the form of irradiation. The polarization is particularly preferably substantially parallel light. The wavelength of the polarized light to be irradiated is preferably in the wavelength range in which the photoreactive group of the polymer or monomer having a photoreactive group can absorb light energy. Specifically, UV (ultraviolet light) having a wavelength of 250 to 400 nm is particularly preferable. Examples of light sources used for the polarized light irradiation include xenon lamps, high pressure mercury lamps, ultra high pressure mercury lamps, metal halide lamps, ultraviolet light lasers such as KrF and ArF, etc. High pressure mercury lamps, ultra high pressure mercury lamps and metal halides Lamps are more preferred. These lamps are preferable because the emission intensity of ultraviolet light with a wavelength of 313 nm is large. Polarized light can be illuminated by illuminating the light from the light source through a suitable polarizer. As such a polarizer, it is possible to use a polarizing filter, a polarizing prism such as Glan-Thomson or Glan-Teller, or a wire grid type polarizer.

  Note that when rubbing or polarized irradiation is performed, masking may be performed to form a plurality of regions (patterns) having different liquid crystal alignment directions.

<Globe alignment film>
The groove alignment film is a film having a concavo-convex pattern or a plurality of grooves (grooves) on the film surface. When a liquid crystal compound is placed on a film having a plurality of straight grooves aligned at equal intervals, liquid crystal molecules are aligned in the direction along the groove.

  As a method of obtaining a globular alignment film, a method of forming a concavo-convex pattern by performing development and rinsing after exposure through an exposure mask having slits of a pattern shape on the surface of a photosensitive polyimide film, a plate having grooves on the surface The method of forming the layer of UV curing resin before curing on the master disk, transferring the resin layer to the substrate and curing it, and a plurality of films of UV curing resin before curing formed on the substrate The roll-shaped original disc which has a groove | channel is pressed, an unevenness | corrugation is formed, and the method etc. which harden | cure are mentioned. Specifically, the methods described in JP-A-6-34976 and JP-A-2011-242743 can be mentioned.

  Among the above methods, a method is preferable in which a roll-shaped master having a plurality of grooves is pressed against the surface of the UV curable resin layer before curing to form asperities, and then curing is performed. From the viewpoint of durability, stainless steel (SUS) is preferable as the roll-shaped master.

The UV curable resin includes a polymer of a monofunctional acrylate, a polymer of a polyfunctional acrylate, or a polymer of a mixture thereof.
A monofunctional acrylate is a group selected from the group consisting of an acryloyloxy group (CH ₂ CHCH—COO—) and a methacryloyloxy group (CH ₂ CC (CH ₃ ) —COO—) (hereinafter, (meth) acryloyloxy) It is a compound which has one. (Meth) acrylate means acrylate or methacrylate.

  The monofunctional acrylate having one (meth) acryloyloxy group includes alkyl (meth) acrylates having 4 to 16 carbon atoms, β-carboxyalkyl (meth) acrylates having 2 to 14 carbon atoms, and alkylation having 2 to 14 carbon atoms Examples include phenyl (meth) acrylate, methoxy polyethylene glycol (meth) acrylate, phenoxy polyethylene glycol (meth) acrylate, and isobonyl (meth) acrylate.

  The polyfunctional acrylate is a compound having two or more (meth) acryloyloxy groups, and a compound having 2 to 6 (meth) acryloyloxy groups is preferable.

  As polyfunctional acrylates having two (meth) acryloyloxy groups, 1,3-butanediol di (meth) acrylate; 1,3-butanediol (meth) acrylate; 1,6-hexanediol di (meth) acrylate Ethylene glycol di (meth) acrylate; diethylene glycol di (meth) acrylate; neopentyl glycol di (meth) acrylate; triethylene glycol di (meth) acrylate; tetraethylene glycol di (meth) acrylate; polyethylene glycol diacrylate; bisphenol A Bis (acryloyloxyethyl) ethers; ethoxylated bisphenol A di (meth) acrylates; propoxylated neopentyl glycol di (meth) acrylates; ethoxylated neopentyl glycols Di (meth) acrylate and 3-methyl-pentanediol di (meth) acrylate.

As a polyfunctional acrylate having 3 to 6 (meth) acryloyloxy groups,
Trimethylolpropane tri (meth) acrylate; pentaerythritol tri (meth) acrylate; tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate; ethoxylated trimethylolpropane tri (meth) acrylate; propoxylated trimethylolpropane tri ( Meta) acrylate; pentaerythritol tetra (meth) acrylate; dipentaerythritol penta (meth) acrylate; dipentaerythritol hexa (meth) acrylate; tripentaerythritol tetra (meth) acrylate; tripentaerythritol penta (meth) acrylate; Erythritol hexa (meth) acrylate; tripentaerythritol hepta (meth) acrylate; tripentaerythritol o Data (meth) acrylate;
A reaction product of pentaerythritol tri (meth) acrylate and an acid anhydride; a reaction product of dipentaerythritol penta (meth) acrylate and an acid anhydride;
Reactant of tripentaerythritol hepta (meth) acrylate with acid anhydride;
Caprolactone modified trimethylolpropane tri (meth) acrylate; caprolactone modified pentaerythritol tri (meth) acrylate; caprolactone modified tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate; caprolactone modified pentaerythritol tetra (meth) acrylate; caprolactone modified Dipentaerythritol penta (meth) acrylate; caprolactone modified dipentaerythritol hexa (meth) acrylate; caprolactone modified tripentaerythritol tetra (meth) acrylate; caprolactone modified tripentaerythritol penta (meth) acrylate; caprolactone modified tripentaerythritol hexa (meth) ) Acrylate; caprolactone modified tripentaellis Tall hepta (meth) acrylate; caprolactone modified tripentaerythritol octa (meth) acrylate; reaction product of caprolactone modified pentaerythritol tri (meth) acrylate and acid anhydride; caprolactone modified dipentaerythritol penta (meth) acrylate and acid anhydride And caprolactone-modified tripentaerythritol hepta (meth) acrylate and an acid anhydride.
The caprolactone modification means that the ring-opened body or ring-opening polymer of caprolactone is introduced between the alcohol-derived site of the (meth) acrylate compound and the (meth) acryloyloxy group.

  Commercial products of multifunctional acrylates include A-DOD-N, A-HD-N, A-NOD-N, APG-100, APG-200, APG-400, A-GLY-9E, and A-GLY-20E. , A-TMM-3, A-TMPT, AD-TMP, ATM-35E, A-TMMT, A-9550, A-DPH, HD-N, NOD-N, NPG, TMPT [Shin-Nakamura Chemical Co., Ltd.] "ARONIX M-220", "M-325", "M-240", "M-270", "M-309", "M-310", "M-321", "M-321" M-350 "," M-360 "," M-305 "," M-306 "," M-450 "," M-451 "," M-408 "," M " -400 "," M-402 "," M-403 "," M-404 "," M 405 "," M-406 "(Toa Gosei Co., Ltd.)," EBECRYL 11 "," 145 "," 150 "," 40 "," 140 "," 180 ", DPGDA, HDDA, TPGDA, HPNDA, PETIA, PETRA, TMPTA, TMPEOTA, DPHA, EBECRYL series (Daicel Cytec Co., Ltd.) and the like.

  In order to obtain an alignment with a small alignment disorder, the width of the convex portion of the glue alignment film is preferably 0.05 to 5 μm, and the width of the recess is preferably 0.1 to 5 μm. The depth is preferably 2 μm or less, and preferably 0.01 to 1 μm.

<Optical anisotropic film>
By removing the substrate from the transfer optically anisotropic sheet of the present invention, an optically anisotropic film comprising a liquid crystal cured film or an alignment film and a liquid crystal cured film can be obtained.

<Transcription>
The liquid crystal cured film of the optically anisotropic sheet for transfer of the present invention is transferred from the substrate to the transferred material via the active energy ray-curable adhesive.
Specifically, an adhesive layer made of an active energy ray-curable adhesive is formed on the surface of the cured liquid crystal film of the optically anisotropic sheet for transfer of the present invention, and an object to be transferred is laminated thereon. After the irradiation of the line, the transfer is carried out by removing the substrate of the optically anisotropic sheet for transfer of the present invention.

  The adhesive layer may be formed on the liquid crystal cured film or may be formed on a material to be transferred. When an alignment film is present between the substrate and the liquid crystal cured film, the alignment film may be removed together with the substrate.

A substrate having on its surface a functional group that forms a chemical bond with a liquid crystal cured film or an alignment film tends to form a chemical bond with the liquid crystal cured film or the alignment film and the like, making it difficult to remove. Therefore, when peeling and removing a base material, the base material with few functional groups of the surface is preferable, and the base material which has not given the surface treatment which forms a functional group on the surface is preferable.
An alignment film having a functional group that forms a chemical bond with the base material tends to increase the adhesion between the base material and the alignment film. Therefore, when the base material is peeled off and removed, a chemical bond is formed with the base material An alignment film with few functional groups is preferred. It is preferable that a reagent for crosslinking the base material and the alignment film is not contained, and further, the solution such as the alignment polymer composition and the composition for forming a photo alignment film contains a component such as a solvent which dissolves the base material. Preferably not.
An alignment film having a functional group that forms a chemical bond with a liquid crystal cured film tends to increase the adhesion between the liquid crystal cured film and the alignment film. Therefore, when removing an alignment film with a base material, the alignment film with few functional groups which form a liquid crystal cured film and a chemical bond is preferable. It is preferable that the cured liquid crystal film and the alignment film do not contain a reagent for crosslinking the cured film and the alignment film.
The cured liquid crystal film having a functional group that forms a chemical bond with the alignment film tends to increase the adhesion between the alignment film and the cured liquid crystal film. Therefore, when removing a base material, or when removing an alignment film with a base material, the liquid crystal cured film with few functional groups which form a chemical bond with a base material or alignment film is preferable. The polymerizable liquid crystal composition preferably does not contain a reagent for crosslinking the substrate or the alignment film with the liquid crystal cured film.

<Adhesive layer>
The adhesive layer is formed of an active energy ray-curable adhesive.

<Active energy ray curable adhesive>
The active energy ray-curable adhesive may contain a solvent.

An active energy ray-curable adhesive is an adhesive that cures upon irradiation with active energy rays.
As the active energy ray-curable adhesive, cationic polymerizable one containing an epoxy compound and a cationic polymerization initiator, Radical polymerizable one containing an acrylic curing component and a radical polymerization initiator, an epoxy compound, etc. Those containing both a cationically polymerizable curing component and a radically polymerizable curing component such as an acrylic compound, and further comprising a cationic polymerization initiator and a radical polymerization initiator, and an electron beam containing no polymerization initiator And the like, which are cured by irradiation with Preferably, it is a radically polymerizable active energy ray-curable adhesive containing an acrylic curing component and a radical polymerization initiator. A cationically polymerizable, active energy ray-curable adhesive containing an epoxy compound and a cationic polymerization initiator, which can be used substantially without solvent, is preferred.

  As an epoxy compound, a glycidyl ether compound of an aromatic compound or a chain compound having a hydroxyl group, a glycidyl amination product of a compound having an amino group, an epoxy compound of a chain compound having a C—C double bond, directly on a saturated carbon ring Or an alicyclic epoxy compound in which a glycidyloxy group or an epoxyethyl group is bonded via alkylene, or an epoxy group is directly bonded to a saturated carbon ring. These epoxy compounds may be used alone or in combination. Among them, alicyclic epoxy compounds are preferable because they are excellent in cationic polymerization.

  Commercial products of epoxy compounds include “jER” series manufactured by Mitsubishi Chemical Co., Ltd. “Epiclon” manufactured by DIC, “Epototh® (registered trademark)” manufactured by Toto Kasei Co., Ltd., “ADEKA RESIN” manufactured by ADEKA Examples thereof include "registered trademark", "Denacol (registered trademark)" manufactured by Nagase ChemteX Co., Ltd., "Dow Epoxy" manufactured by Dow Chemical, "Tepic (registered trademark)" manufactured by Nissan Chemical Industries, Ltd., and the like. As an alicyclic epoxy compound, Daicel Co., Ltd. product "Ceroxide" series and "Cyclomer", Dow Chemical company "Cyracure UVR" series etc. are mentioned.

  The active energy ray-curable adhesive containing an epoxy compound may further contain a compound other than the epoxy compound. Examples of compounds other than epoxy compounds include oxetane compounds and acrylic compounds. Among them, it is preferable to use an oxetane compound in combination, because the curing speed may be accelerated in the cationic polymerization.

  Examples of the oxetane compounds include “Aron Oxetane (registered trademark)” series manufactured by Toagosei Co., Ltd., “ETERANACL (registered trademark)” series manufactured by Ube Industries, Ltd., and the like.

  It is preferable to use an active energy ray-curable adhesive containing an epoxy compound or an oxetane compound without using a solvent.

  The cationic polymerization initiator is a compound which generates cationic species upon irradiation with active energy rays such as ultraviolet rays, and is an aromatic diazonium salt; an aromatic iodonium salt, an onium salt such as an aromatic sulfonium salt, and iron; An arene complex is mentioned. These cationic polymerization initiators may be used alone or in combination.

  Commercially available cationic polymerization initiators include “Kayarad (registered trademark)” series manufactured by Nippon Kayaku Co., Ltd., “Cyracure UVI” series manufactured by Dow Chemical Co., “CPI” series manufactured by San Apro Co., Ltd., Midori Chemical And the like, TAD, BBI, and DTS; ADEKA, Inc., ADEKA OPTOMER series; and Rhodia, RHODORSIL (registered trademark).

  The content of the cationic polymerization initiator is usually 0.5 to 20 parts by mass, preferably 1 to 15 parts by mass with respect to 100 parts by mass of the active energy ray-curable adhesive.

  Examples of the acrylic curing component include (meth) acrylates such as methyl (meth) acrylate and hydroxyethyl (meth) acrylate, and (meth) acrylic acid.

  The radical polymerization initiator may, for example, be a hydrogen abstraction type photo radical generator or a cleavage type photo radical generator.

  Examples of the hydrogen abstraction type photoradical generator include naphthalene derivatives such as 1-methylnaphthalene, anthracene derivatives, pyrene derivatives, carbazole derivatives, benzophenone derivatives, thioxanthone derivatives and coumarin derivatives.

  Cleavage type photoradical generators include benzoin ether derivatives, arylalkyl ketones such as acetophenone derivatives, oxime ketones, acyl phosphine oxides, S-phenyl thiobenzoate, titanocenes, and derivatives obtained by polymerizing them Etc.

  Among the cleavage type photoradical generators, acyl phosphine oxides are preferable, and specifically, trimethyl benzoyl diphenyl phosphine oxide (trade name “DAROCURE TPO”; Ciba Japan Ltd.), bis (2,6-dimethoxy-benzoyl) )-(2,4,4-trimethyl-pentyl) -phosphine oxide (trade name “CGI 403”; Ciba Japan Ltd.), or bis (2,4,6-trimethylbenzoyl) -2,4-di Preferred is pentoxyphenyl phosphine oxide (trade name “Irgacure 819”; Ciba Japan Ltd.).

The active energy ray-curable adhesive may contain a sensitizer.
The content of the sensitizer is preferably 0.1 to 20 parts by mass with respect to 100 parts by mass of the active energy ray-curable adhesive.

  The active energy ray-curable adhesive further contains an ion trap agent, an antioxidant, a chain transfer agent, a tackifier, a thermoplastic resin, a filler, a flow control agent, a plasticizer, an antifoamer, and the like. It is also good.

  The active energy ray in the present invention is defined as an energy ray capable of decomposing a compound generating an active species to generate an active species. Examples of such active energy rays include visible light, ultraviolet rays, infrared rays, X-rays, α-rays, β-rays, γ-rays and electron beams, with ultraviolet rays and electron beams being preferred.

  The accelerating voltage for electron beam irradiation is usually 5 to 300 kV, preferably 10 to 250 kV. The irradiation dose is usually 5 to 100 kGy, preferably 10 to 75 kGy.

  Electron beam irradiation is usually performed in an inert gas, but may be performed in the air or under a condition where a small amount of oxygen is introduced.

The ultraviolet irradiation intensity is usually 10 to 5000 mW / cm ² . The ultraviolet irradiation intensity is preferably an intensity in a wavelength range effective for activating a cationic polymerization initiator or a radical polymerization initiator. Such light irradiation intensity in one or a plurality of times irradiation, the integrated light quantity of 10 mJ / cm ² or more, preferably to such an 10~5,000mJ / cm ^2.
The amount of irradiation energy is at 200 mJ / cm ² or more 1500 mJ / cm ² or less, more preferably are 300 mJ / cm ² or more 1200 mJ / cm ² or less and more preferably at a wavelength of 365nm

  As a light source of ultraviolet light, low pressure mercury lamp, medium pressure mercury lamp, high pressure mercury lamp, super high pressure mercury lamp, xenon lamp, halogen lamp, carbon arc lamp, tungsten lamp, gallium lamp, excimer laser, LED light source emitting wavelength range 380 to 440 nm A chemical lamp, a black light lamp, a microwave excitation mercury lamp, and a metal halide lamp can be mentioned. Preferably it is a metal halide lamp.

As the solvent, water; alcohols such as methanol, ethanol, isopropyl alcohol, 1-butanol, 2-butanol, sec-butyl alcohol, tert-butyl alcohol, ethylene glycol, propylene glycol, butanediol, etc .;
Propyl ether, isopropyl ether, butyl ether, isobutyl ether, n-amyl ether, isoamyl ether, methyl butyl ether, methyl isobutyl ether, methyl n-amyl ether, methyl isoamyl ether, ethyl propyl ether, ethyl isopropyl ether, ethyl butyl ether, ethyl isobutyl ether Saturated aliphatic ether compounds such as ethyl n-amyl ether and ethyl isoamyl ether;
Unsaturated aliphatic ether compounds such as allyl ether and ethyl allyl ether;
Aromatic ether compounds such as anisole, phenetole, phenyl ether, benzyl ether;
Cyclic ether compounds such as tetrahydrofuran, tetrahydropyran and dioxane;
Ethylene glycol ether compounds such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether;
Monocarboxylic acid compounds such as formic acid, acetic acid, acetic anhydride, acrylic acid, citric acid, propionic acid, butyric acid;
Butyl formate, amyl formate, propyl acetate, isopropyl acetate, butyl acetate, sec-butyl acetate, amyl acetate, isoamyl acetate, 2-ethylhexyl acetate, cyclohexyl acetate, butyl acetate cyclohexyl, ethyl propionate, ethyl propionate, butyl propionate, amyl propionate, Organic acid ester compounds such as butyl butyrate, diethyl carbonate, diethyl oxalate, methyl lactate, ethyl lactate, butyl lactate, triethyl phosphate;
Acetone, ethyl ketone, propyl ketone, butyl ketone, methyl isopropyl ketone, methyl isobutyl ketone, diisobutyl ketone, acetylacetone, diacetone alcohol, cyclohexanone, cyclopentanone, cyclopentanone, methylcyclohexanone, cycloheptanone and the like;
Dicarboxylic acid compounds such as succinic acid, glutaric acid, adipic acid, undecanedioic acid, pyruvic acid, citraconic acid;
1,4-dioxane, furfural, N-methyl pyrrolidone and the like can be mentioned.
Among them, water and alcohol are preferable, and alcohol having 1 to 4 carbon atoms is more preferable, and methanol, ethanol, isopropyl alcohol, 1-butanol, 2-butanol, sec-butyl alcohol, tert-butyl alcohol, ethylene glycol, propylene glycol And at least one alcohol selected from the group consisting of butanediol and butanediol is more preferable, and isopropyl alcohol and / or 1-butanol is even more preferable.
The water may be pure water or may contain impurities as much as tap water.

  The thickness of the adhesive layer formed from the active energy ray-curable adhesive is usually 0.001 to 5 μm, preferably 0.01 μm or more, preferably 2 μm or less, and more preferably 1 μm or less. . If the adhesive layer formed of the active energy ray-curable adhesive is too thick, the appearance of the optically anisotropic film tends to be poor.

<Transcribed material>
As a material to be transferred, the same as the substrate, a polarizer, a polarizing plate, a display device and the like can be mentioned. A laminate is obtained by transferring the liquid crystal cured film of the optically anisotropic sheet for transfer of the present invention to a material to be transferred. The haze value of the laminate is preferably 2% or less.

<Polarizer and Polarizer>
A polarizer has a polarization function. As a polarizer, the stretched film to which the pigment | dye which has absorption anisotropy is made to adsorb | suck, the film etc. which apply | coated the pigment | dye which has absorption anisotropy are mentioned. Examples of the dye having absorption anisotropy include dichroic dyes.

  In a stretched film on which a dye having absorption anisotropy is adsorbed, the dichroic dye is usually adsorbed by a step of uniaxially stretching a polyvinyl alcohol resin film, or by staining the polyvinyl alcohol resin film with a dichroic dye. It manufactures through the process of making it, the process of processing the polyvinyl alcohol-type resin film by which the dichroic dye was adsorbed with boric acid aqueous solution, and the process of washing with water after the process by boric acid aqueous solution.

  The polyvinyl alcohol-based resin is obtained by saponifying a polyvinyl acetate-based resin. Examples of polyvinyl acetate resins include polyvinyl acetate, which is a homopolymer of vinyl acetate, and copolymers of vinyl acetate and other monomers copolymerizable therewith. Other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, acrylamides having an ammonium group, and the like.

  The degree of saponification of the polyvinyl alcohol resin is usually 85 to 100 mol%, preferably 98 mol% or more. The polyvinyl alcohol-based resin may be modified, and aldehyde-modified polyvinyl formals and polyvinyl acetals can also be used. The polymerization degree of the polyvinyl alcohol-based resin is usually 1,000 to 10,000, and preferably in the range of 1,500 to 5,000.

  By forming such a polyvinyl alcohol-based resin, a raw film film of a polarizer can be obtained. The polyvinyl alcohol-based resin can be formed into a film by a known method. The thickness of the polyvinyl alcohol-based raw film is preferably 10 to 150 μm.

  Uniaxial stretching of the polyvinyl alcohol-based resin film can be performed before, simultaneously with, or after the dyeing with the dichroic dye. When uniaxial stretching is performed after dyeing, this uniaxial stretching may be performed before or during the boric acid treatment. It is also possible to perform uniaxial stretching in these multiple steps. In uniaxial stretching, uniaxial stretching may be performed between rolls having different peripheral speeds, or uniaxial stretching may be performed using a heat roll. Uniaxial stretching may be dry stretching in which stretching is performed in the atmosphere, or may be wet stretching in which a solvent is used and stretching is performed in a state where the polyvinyl alcohol resin film is swollen. The stretching ratio is usually 3 to 8 times.

Dyeing of a polyvinyl alcohol-based resin film with a dichroic dye is performed by a method of immersing a polyvinyl alcohol-based resin film in an aqueous solution containing a dichroic dye.
The dichroic dye includes iodine and a dichroic organic dye. Examples of the dichroic organic dye include a dichroic direct dye consisting of a disazo compound such as CI DIRECT RED 39, and a dichroic direct dye consisting of a compound such as trisazo or tetrakisazo. The polyvinyl alcohol-based resin film is preferably subjected to immersion treatment in water before the dyeing treatment.

  When the dichroic dye is iodine, a method of immersing and staining a polyvinyl alcohol-based resin film in an aqueous solution containing iodine and potassium iodide is usually employed. The content of iodine in the aqueous solution is usually 0.01 to 1 part by mass per 100 parts by mass of water. The content of potassium iodide is usually 0.5 to 20 parts by mass per 100 parts by mass of water. The temperature of the aqueous solution used for dyeing is usually 20 to 40 ° C. The immersion time (staining time) in this aqueous solution is usually 20 to 1,800 seconds.

When the dichroic dye is a dichroic organic dye, usually, a method is employed in which a polyvinyl alcohol-based resin film is dipped in an aqueous solution containing a water-soluble dichroic dye for dyeing. The content of the dichroic organic dye in the aqueous solution is usually 1 × 10 ⁻⁴ to 10 parts by mass, preferably 1 × 10 ⁻³ to 1 parts by mass, and more preferably 1 × per 100 parts by mass of water. 10 ^-3 to 1 × 10 ^-2 parts by mass. The aqueous solution may contain an inorganic salt such as sodium sulfate as a staining aid. The temperature of the aqueous solution is usually 20-80 ° C. The immersion time (staining time) in the aqueous solution is usually 10 to 1,800 seconds.

  The boric acid process after dyeing | staining with a dichroic dye can be normally performed by the method of immersing the dyed polyvinyl alcohol-type resin film in boric-acid aqueous solution. The content of boric acid in the aqueous boric acid solution is usually 2 to 15 parts by mass, preferably 5 to 12 parts by mass, per 100 parts by mass of water. When iodine is used as the dichroic dye, this boric acid aqueous solution preferably contains potassium iodide, and the content of potassium iodide is usually 0.1 to 15 parts by mass per 100 parts by mass of water. Preferably it is 5-12 mass parts. The immersion time in the boric acid aqueous solution is usually 60 to 1,200 seconds, preferably 150 to 600 seconds, and more preferably 200 to 400 seconds. The temperature of boric acid treatment is usually 50 ° C. or higher, preferably 50 to 85 ° C., and more preferably 60 to 80 ° C.

  The polyvinyl alcohol resin film after boric acid treatment is usually washed with water. The water washing process can be performed by the method of immersing the boric-acid-treated polyvinyl alcohol-type resin film in water. The temperature of water in the water washing treatment is usually 5 to 40 ° C. The immersion time is usually 1 to 120 seconds.

  After washing with water, drying treatment is performed to obtain a polarizer. The drying process can be performed using a hot air dryer or a far infrared heater. The temperature of the drying treatment is usually 30 to 100 ° C, preferably 50 to 80 ° C. The drying time is usually 60 to 600 seconds, preferably 120 to 600 seconds. By the drying process, the moisture content of the polarizer is reduced to a practical level. The water content is usually 5 to 20% by weight, preferably 8 to 15% by weight. When the moisture content is less than 5% by weight, the flexibility of the polarizer is lost, and the polarizer may be damaged or broken after it is dried. If the water content exceeds 20% by weight, the heat stability of the polarizer may be deteriorated.

  Thus, the thickness of a polarizer obtained by uniaxially stretching, dyeing with a dichroic dye, boric acid treatment, washing with water and drying on a polyvinyl alcohol-based resin film is preferably 5 to 40 μm.

  Examples of the film coated with a dye having absorption anisotropy include a composition obtained by applying a composition containing a dichroic dye having liquid crystallinity or a composition containing a dichroic dye and a polymerizable liquid crystal. It can be mentioned.

  It is preferable that the film coated with the dye having absorption anisotropy is thin, but if it is too thin, the strength tends to be reduced and the processability tends to be poor. The thickness of the film is usually 20 μm or less, preferably 5 μm or less, and more preferably 0.5 to 3 μm.

  As a film which apply | coated the pigment | dye which has absorption anisotropy, the film as described in Unexamined-Japanese-Patent No. 2012-33249 etc. is mentioned specifically ,.

  A polarizing plate is obtained by laminating a transparent protective film on at least one surface of a polarizer via an adhesive. As a transparent protective film, the same transparent film as the base material mentioned above is preferable.

<Method of producing optically anisotropic sheet for transfer>
The composition for liquid crystal cured film formation is apply | coated to the base-material surface or the alignment film surface formed in the base material.
Examples of the method of application include the same methods as exemplified as the method of applying the oriented polymer composition to a substrate. The thickness of the composition for liquid crystal cured film formation to apply | coat is determined in consideration of the thickness of the liquid crystal cured film obtained.

  Next, the dry film of the composition for forming a liquid crystal cured film is formed on the surface of the substrate or the alignment film by removing the solvent contained in the composition for forming a liquid crystal cured film under the condition that the polymerizable liquid crystal compound does not polymerize. . Examples of the method of removing the solvent include a natural drying method, a ventilation drying method, a heat drying and a reduced pressure drying method.

After the dry film is heated or the like to align the liquid crystal alignment of the polymerizable liquid crystal compound contained in the dry film, and while maintaining the liquid crystal alignment, the dry film is irradiated with energy to polymerize the polymerizable liquid crystal compound . When the composition for forming a liquid crystal cured film contains a polymerization initiator, it is preferable to irradiate energy of the conditions under which the polymerization initiator is activated. When the polymerization initiator is a photopolymerization initiator, the energy is preferably light. The light to be irradiated is appropriately selected according to the type of the polymerization initiator contained in the dry film, or the type of the polymerizable liquid crystal compound (in particular, the type of the polymerization group contained in the polymerizable liquid crystal compound) and the amount thereof. Examples of such light include light selected from the group consisting of visible light, ultraviolet light and laser light, active electron beams and the like. Among them, ultraviolet light is preferable in that the progress of the polymerization reaction can be easily controlled and that a device widely used in the field as an apparatus related to polymerization can be used. Therefore, it is preferable to select the type of the polymerizable liquid crystal compound and the polymerization initiator contained in the composition for forming a liquid crystal cured film so that the composition can be polymerized by ultraviolet light. When the polymerization is carried out, it is preferable to control the polymerization temperature by cooling the dried film by suitable cooling means together with ultraviolet light irradiation. If the polymerizable liquid crystal compound is polymerized at a lower temperature by such cooling, the liquid crystal cured film can be appropriately produced even if the substrate has low heat resistance.
Thus, a liquid crystal cured film having liquid crystal alignment is formed on the surface of the substrate or the alignment film.

<Primer layer>
A primer layer may be provided on the surface of the obtained liquid crystal cured film.
The primer layer usually contains a transparent resin, and is formed of a transparent resin solution. The primer layer can suppress defects in the liquid crystal cured film when forming the adhesive layer. As transparent resin, what is excellent in coating property and excellent in transparency and adhesiveness after primer layer formation is preferable.

  The solvent of the transparent resin solution is selected according to the solubility of the transparent resin. As the solvent, aromatic hydrocarbon solvents such as benzene, toluene and xylene; ketone solvents such as acetone, methyl ethyl ketone and methyl isobutyl ketone; ester solvents such as ethyl acetate and isobutyl acetate; chlorinated carbonized such as methylene chloride, trichloroethylene and chloroform Hydrogen solvents; alcohol solvents such as ethanol, 1-propanol, 2-propanol, 1-butanol and the like can be mentioned. When the primer layer is formed using a transparent resin solution containing an organic solvent, water is preferable because it may affect the optical properties of the liquid crystal cured film.

  An epoxy resin is mentioned as transparent resin. The epoxy resin may be of one-part curing type or two-part curing type. Water soluble epoxy resins are particularly preferred. As a water-soluble epoxy resin, a polyamide epoxy resin obtained by reacting epichlorohydrin with a polyamide polyamine obtained by the reaction of a polyalkylene polyamine such as diethylenetriamine or triethylenetetramine and a dicarboxylic acid such as adipic acid Can be mentioned. As a commercial item of this polyamide epoxy resin, Sumires resin (registered trademark) 650 (30) sold by Sumika Chemtex Co., Ltd., and Sumires resin (registered trademark) 675 etc. are mentioned.

  When the transparent resin is a water-soluble epoxy resin, it is preferable to use another water-soluble resin such as a polyvinyl alcohol-based resin in combination in order to further improve the coating properties. Polyvinyl alcohol-based resin is modified polyvinyl such as partially saponified polyvinyl alcohol, completely saponified polyvinyl alcohol, carboxyl group modified polyvinyl alcohol, acetoacetyl group modified polyvinyl alcohol, methylol group modified polyvinyl alcohol, amino group modified polyvinyl alcohol It may be an alcohol resin. Examples of suitable commercial products of polyvinyl alcohol resins include KL-318 (trade name), which is an anionic group-containing polyvinyl alcohol sold by Kuraray Co., Ltd., and the like.

  When forming a primer layer from the solution containing a water-soluble epoxy resin, 0.2-1.5 weight part is preferable with respect to 100 weight part of water with respect to 100 weight part of water. When mix | blending polyvinyl alcohol-type resin with a solution, the quantity is preferable in 1 to 6 weight part with respect to 100 weight part of water. The thickness of the primer layer is preferably 0.1 to 10 μm.

  The method for forming the primer layer is not limited, and various known coating methods such as direct gravure method, reverse gravure method, die coating method, comma coating method, bar coating method and the like can be used.

<Adhesive layer>
An adhesive layer may be formed on the surface of the obtained liquid crystal cured film or primer layer.
The adhesive layer is formed by applying an adhesive to the surface of the liquid crystal cured film or primer layer. When the pressure-sensitive adhesive contains a solvent, it is formed by applying the pressure-sensitive adhesive to the surface of the liquid crystal cured film or primer layer and removing the solvent. The adhesive layer formed from the pressure-sensitive adhesive applies the pressure-sensitive adhesive to the release treatment surface of the release-treated film, and removes the solvent to remove the solvent. The release treatment surface of the release-treated film After the adhesive layer is formed, the film with the adhesive layer can be formed also by a method of bonding to the surface of the liquid crystal cured film or the primer layer so that the adhesive layer side is the bonding surface.
The corona treatment can further improve the adhesion between the liquid crystal cured film or the primer layer and the adhesive layer.

  Examples of the method of applying the tacky adhesive include the same methods as those exemplified as the method of applying the orientable polymer composition to the substrate. The method for removing the solvent from the applied adhesive may be the same method as the method for removing the solvent from the orientable polymer composition.

<Circularly polarizing plate>
When the material to be transferred is a polarizer or a polarizing plate, and the cured liquid crystal film of the optically anisotropic sheet for transfer of the present invention satisfies the formula (3), the substrate is obtained from the optically anisotropic sheet for transfer of the present invention By transferring the removed optically anisotropic film to a material to be transferred, a circularly polarizing plate is obtained as a laminate.

<Use>
The optically anisotropic film and the circularly polarizing plate can be used in various display devices.
The display device is a device having a display element, and includes a light emitting element or a light emitting device as a light emitting source. As display devices, liquid crystal display devices, organic electroluminescence (EL) display devices, inorganic electroluminescence (EL) display devices, touch panel display devices, electron emission display devices (field emission display devices (FED etc.), surface field emission display devices (SED)), electronic paper (display using electronic ink or electrophoretic element, plasma display, projection type display (grating light valve (GLV) display, display having digital micro mirror device (DMD), etc.) And piezoelectric ceramic displays etc. The liquid crystal display device may be any of a transmissive liquid crystal display device, a semi-transmissive liquid crystal display device, a reflective liquid crystal display device, a direct view liquid crystal display device, a projection type liquid crystal display device etc. These display devices are display devices that display a two-dimensional image. In particular, the circularly polarizing plate can be effectively used for organic electroluminescence (EL) display devices and inorganic electroluminescence (EL) display devices, and it is possible to use optically compensated polarized light. The plate can be effectively used in liquid crystal display devices and touch panel display devices.

FIG. 1 is a schematic view showing a cross-sectional configuration of a liquid crystal display device 10 including an optically anisotropic film.
The liquid crystal layer 17 is sandwiched between two substrates 14 a and 14 b.
A color filter 15 is disposed on the liquid crystal layer 17 side of the base 14 a. The color filter 15 is disposed at a position facing the pixel electrode 22 with the liquid crystal layer 17 interposed therebetween, and the black matrix 20 is disposed at a position facing the boundary between the pixel electrodes. A transparent electrode 16 is disposed on the liquid crystal layer 17 side so as to cover the color filter 15 and the black matrix 20. An overcoat layer (not shown) may be provided between the color filter 15 and the transparent electrode 16.

  The thin film transistor 21 and the pixel electrode 22 are regularly arranged on the liquid crystal layer 17 side of the base 14 b. The pixel electrode 22 is disposed at a position facing the color filter 15 across the liquid crystal layer 17. An interlayer insulating film 18 having a connection hole (not shown) is disposed between the thin film transistor 21 and the pixel electrode 22.

A glass substrate and a plastic substrate are used as the substrate 14a and the substrate 14b.
As the glass substrate and the plastic substrate, the same ones as those exemplified as the above-mentioned substrate can be mentioned. When manufacturing the color filter 15 and the thin film transistor 21 formed on a base material, when the process of heating to high temperature is required, a glass base material and a quartz base material are preferable.

  As the thin film transistor, an optimal thin film transistor can be adopted according to the material of the base 14b. The thin film transistor 21 includes a high temperature polysilicon transistor formed on a quartz substrate, a low temperature polysilicon transistor formed on a glass substrate, and an amorphous silicon transistor formed on a glass substrate or a plastic substrate. In order to further miniaturize the liquid crystal display device, a driver IC may be formed on the base 14 b.

  A liquid crystal layer 17 is disposed between the transparent electrode 16 and the pixel electrode 22. In the liquid crystal layer 17, spacers 23 are disposed in order to keep the distance between the base 14 a and the base 14 b constant. Although the columnar spacer is illustrated, the spacer is not limited to the columnar shape, and the shape is arbitrary as long as the distance between the base 14 a and the base 14 b can be kept constant.

  The respective members are stacked in the order of the base 14 a, the color filter 15 and the black matrix 20, the transparent electrode 16, the liquid crystal layer 17, the pixel electrode 22, the interlayer insulating film 18 and the thin film transistor 21, and the base 14 b.

  Of the base 14 a and the base 14 b sandwiching the liquid crystal layer 17, the polarizing films 12 a and 12 b are provided outside the base 14 a and the base 14 b. Furthermore, retardation films (for example, 1⁄4 wavelength plate and optical compensation films) 13a and 13b are laminated, and an optically anisotropic film is used as at least one retardation film among them. These retardation films can provide the liquid crystal display device 10 with a function of converting incident light into linearly polarized light. The retardation films 13 a and 13 b may not be disposed depending on the structure of the liquid crystal display device or the type of the liquid crystal compound contained in the liquid crystal layer 17.

  By using a liquid crystal polarizing film as the retardation film 13a and / or 13b, the liquid crystal display device 10 can be further thinned.

A backlight unit 19 as a light source is disposed outside the polarizing film 12b.
The backlight unit 19 includes a light source, a light guide, a reflector, a diffusion sheet, and a viewing angle adjustment sheet. Examples of light sources include electroluminescence, cold cathode tubes, hot cathode tubes, light emitting diodes (LEDs), laser light sources, and mercury lamps.

  When the liquid crystal display device 10 is a transmissive liquid crystal display device, white light emitted from the light source in the backlight unit 20 is incident on the light guide, is diverted by the reflection plate, and is diffused by the diffusion sheet . Diffused light is adjusted by the viewing angle adjustment sheet to have a desired directivity, and then enters the polarizing film 12 b from the backlight unit 19.

  Of the non-polarized incident light, only one linearly polarized light passes through the polarizer 12 b of the liquid crystal panel. The linearly polarized light sequentially passes through the base 14 b, the pixel electrode 22, and the like to reach the liquid crystal layer 17.

  Here, the alignment state of the liquid crystal molecules contained in the liquid crystal layer 17 is changed depending on the presence or absence of the potential difference between the pixel electrode 22 and the transparent electrode 16 facing to control the luminance of the light emitted from the liquid crystal display device 10 Ru. When the liquid crystal layer 17 is in an alignment state in which polarized light is transmitted as it is, light transmitted through the liquid crystal layer 17, the transparent electrode 16 and the color filter 15 is absorbed by the polarizing film 12a. Due to this, this pixel displays black.

  Conversely, when the liquid crystal layer 17 is in an alignment state that converts and transmits polarized light, the polarized light is transmitted through the liquid crystal layer 17 and the transparent electrode 16, and light of a specific wavelength range is transmitted through the color filter 15. In the polarizing film 12a, the liquid crystal display device displays the color determined by the color filter the brightest. In the alignment state between these two states, the luminance of light emitted from the liquid crystal display device 10 is also in the middle between the two, so this pixel displays an intermediate color.

  FIG. 2 is a schematic view showing the organic EL display device 30. As shown in FIG. The organic EL display device 30 shown in FIG. 2A includes a circularly polarizing plate 31, and the light emitting layer 35 and the cathode are formed on the substrate 32 on which the pixel electrode 34 is formed via the interlayer insulating film 33. The electrode 36 is laminated. The circularly polarizing plate 31 is disposed on the opposite side of the substrate 32 from the light emitting layer 35. The light emitting layer 35 emits light by applying a positive voltage to the pixel electrode 34 and a negative voltage to the cathode electrode 36 and applying a direct current between the pixel electrode 34 and the cathode electrode 36. The light emitting layer 35 includes an electron transport layer, a light emitting layer, a hole transport layer, and the like. The light emitted from the light emitting layer 35 passes through the pixel electrode 34, the interlayer insulating film 33, the substrate 32, and the circularly polarizing plate 31.

  In order to manufacture the organic EL display device 30, first, the thin film transistor 38 is formed on the substrate 32 in a desired shape. Then, the interlayer insulating film 33 is formed, and then the pixel electrode 34 is formed by sputtering and patterned. Thereafter, the light emitting layer 35 is stacked.

  Next, the circularly polarizing plate 31 is provided on the surface of the substrate 32 opposite to the surface on which the thin film transistor 38 is provided. In that case, the polarizing plate in the circularly polarizing plate 31 is disposed to be the outer side (the opposite side of the substrate 32).

  Examples of the substrate 32 include sapphire glass substrates, quartz glass substrates, soda glass substrates, ceramic substrates such as alumina; metal substrates such as copper; plastic substrates and the like. Although not shown, a thermally conductive film may be formed on the substrate 32. As a heat conductive film, a diamond thin film (DLC etc.) etc. are mentioned. When the pixel electrode 34 is of a reflective type, light is emitted in the direction opposite to that of the substrate 32. Therefore, not only transparent materials but also non-transparent materials such as stainless steel can be used. The substrate may be formed singly or may be formed as a laminated substrate by bonding a plurality of substrates with an adhesive. These substrates may be plate-like or films.

  As the thin film transistor 38, a polycrystalline silicon transistor or the like may be used. The thin film transistor 38 is provided at the end of the pixel electrode 34 and has a size of 10 to 30 μm. The size of the pixel electrode 34 is 20 μm × 20 μm to 300 μm × 300 μm.

  The wiring electrode of the thin film transistor 38 is provided on the substrate 32. The wiring electrode has a low resistance and is electrically connected to the pixel electrode 34 to reduce the resistance value. Generally, the wiring electrode is made of Al, Al and a transition metal (except for Ti), Ti or What contains any 1 type or 2 types or more of titanium nitride (TiN) is used.

An interlayer insulating film 33 is provided between the thin film transistor 38 and the pixel electrode 34. The interlayer insulating film 33 is formed by sputtering or vacuum deposition of an inorganic material such as silicon oxide such as SiO ₂ or silicon nitride, a silicon oxide layer formed by SOG (spin on glass), photoresist, polyimide And any film having insulating properties such as a coating film of a resin material such as an acrylic resin.

  Ribs 39 are formed on the interlayer insulating film 33. The rib 39 is disposed at the periphery (between adjacent pixels) of the pixel electrode 34. Examples of the material of the ribs 39 include acrylic resin and polyimide resin. The thickness of the rib 39 is preferably 1.0 to 3.5 μm, more preferably 1.5 to 2.5 μm.

  Next, an EL element including the pixel electrode 34, the light emitting layer 35, and the cathode electrode 36 will be described. The light emitting layer 35 has at least one hole transporting layer and at least one light emitting layer, and sequentially has an electron injecting and transporting layer, a light emitting layer, a hole transporting layer and a hole injecting layer.

Examples of the pixel electrode 34 include ITO (tin-doped indium oxide), IZO (zinc-doped indium oxide), IGZO, ZnO, SnO _2, In ₂ O _{3 and the} like, with ITO and IZO being particularly preferable. The thickness of the pixel electrode 35 may have a certain thickness or more capable of sufficient hole injection, and is preferably 10 to 500 nm.

  The pixel electrode 34 can be formed by a vapor deposition method (preferably, a sputtering method). The sputtering gas may, for example, be an inert gas such as Ar, He, Ne, Kr and Xe, or a mixed gas thereof.

  Examples of the constituent material of the cathode electrode 36 include metallic elements such as K, Li, Na, Mg, La, Ce, Ca, Sr, Ba, Al, Ag, In, Sn, Zn and Zr, and the operation stability of the electrode In order to improve the properties, a binary or ternary alloy system selected from the exemplified metal elements is preferred. As alloy systems, Ag · Mg (Ag: 1 to 20 at%), Al·Li (Li: 0.3 to 14 at%), In · Mg (Mg: 50 to 80 at%), and Al · Ca (Ca: 5) To 20 at%) is preferable.

  The cathode electrode 36 is formed by vapor deposition, sputtering or the like. The thickness of the cathode electrode 37 is usually 0.1 nm or more, preferably 1 to 500 nm.

  The hole injection layer has a function of facilitating the injection of holes from the pixel electrode 34, and the hole transport layer has a function of transporting holes and a function of blocking electrons, and a charge injection layer or charge It is also called a transport layer.

  The thickness of the light emitting layer, the combined thickness of the hole injecting layer and the hole transporting layer, and the thickness of the electron injecting and transporting layer are preferably 5 to 100 nm. Various organic compounds can be used for the hole injection layer and the hole transport layer. As a formation method of a positive hole injection transport layer, a light emitting layer, and an electron injection transport layer, a vacuum evaporation method is preferable at the point which can form a homogeneous thin film.

  As the light emitting layer 35, one using light emission (fluorescence) from singlet excitons, one using light emission (phosphorescence) from triplet excitons, light emission (fluorescence) from singlet excitons Those including those using and those utilizing light emission (phosphorescence) from triplet excitons, those formed by organic matter, those including those formed by organic matter and those formed by inorganic matter, high A material of molecules, a material of low molecular weight, a material containing a material of high molecular weight and a material of low molecular weight, and the like can be used, and the light emitting layer 35 using various materials known for EL elements is used as an organic EL display 30 can be used.

  A desiccant (not shown) is disposed in the space between the cathode electrode 36 and the sealing layer 37. Moisture is absorbed by the desiccant to prevent deterioration of the light emitting layer 35.

  The organic EL display device 30 of the present invention shown in FIG. 2B includes the circularly polarizing plate 31, and the light emitting layer 35 is formed on the substrate 32 on which the pixel electrode 34 is formed via the interlayer insulating film 33. , And the cathode electrode 36 are laminated. A sealing layer 37 is formed on the cathode electrode, and a circularly polarizing plate 31 is disposed on the opposite side of the substrate 32. The light emitted from the light emitting layer 35 passes through the cathode electrode 36, the sealing layer 37, and the circularly polarizing plate 31.

Hereinafter, the present invention will be described in more detail by way of examples. Unless otherwise indicated, "%" and "parts" in the examples are% by mass and parts by mass.
The conditions of the corona treatment in the example are as follows (equipment: AGF-B10 manufactured by Kasuga Denki Co., Ltd., output: 0.3 kW, treatment speed: 3 m / min, number of times: once).

１部
溶剤：プロピレングリコールモノメチルエーテル ９９部 [Preparation of composition for forming photo alignment film]
The following components were mixed, and the obtained mixture was stirred at 80 ° C. for 1 hour to obtain a composition (1) for forming a photo alignment film.
Polymers with Photoreactive Groups:

1 part Solvent: 99 parts of propylene glycol monomethyl ether

[Preparation of Composition (1) for Forming Liquid Crystal Cured Film]
The following components were mixed, and the obtained mixture was stirred at 80 ° C. for 1 hour to obtain a composition (1) for forming a liquid crystal cured film.
The polymerizable liquid crystal compound A1 was synthesized by the method described in JP-A-2010-31223.
The polymerizable liquid crystal compound A2 was synthesized by the method described in JP-A-2010-24438.

８６部
重合性液晶化合物Ａ２：

１４部
重合開始剤：２−ジメチルアミノ−２−ベンジル−１−（４−モルホリノフェニル）ブタン−１−オン（イルガキュア（登録商標）３６９；チバ スペシャルティケミカルズ社製） ６部
レベリング剤：ポリアクリレート化合物（ＢＹＫ−３６１Ｎ；ＢＹＫ−Ｃｈｅｍｉｅ社製） ０．１部
重合禁止剤：ジブチルヒドロキシトルエン（和光純薬工業株式会社製） １部
溶剤：Ｎ−メチル−２−ピロリジノン １６０部、シクロペンタノン ２４０部 Polymerizable liquid crystal compound A1:

86 parts of polymerizable liquid crystal compound A2:

14 parts polymerization initiator: 2-dimethylamino-2-benzyl-1- (4-morpholinophenyl) butan-1-one (IRGACURE (registered trademark) 369; manufactured by Ciba Specialty Chemicals) 6 parts leveling agent: polyacrylate compound (BYK-361N; manufactured by BYK-Chemie) 0.1 part polymerization inhibitor: dibutyl hydroxytoluene (manufactured by Wako Pure Chemical Industries, Ltd.) 1 part solvent: 160 parts N-methyl-2-pyrrolidinone, 240 parts cyclopentanone

[Preparation of composition for liquid crystal cured film formation (2)]
A composition for forming a liquid crystal cured film in the same manner as the composition for forming a liquid crystal cured film (1) except that the polymerizable liquid crystal compound A2 of the composition for forming a liquid crystal cured film (1) is changed to a polymerizable liquid crystal compound A3. I got (2).
The polymerizable liquid crystal compound A3 was synthesized by the method described in JP-A-2010-31223.

１４部 Polymerizable liquid crystal compound A3:

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[Preparation of active energy ray-curable adhesive]
The following components were mixed to prepare an active energy ray-curable adhesive (1).
3,4-Epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate 40 parts Diglycidyl ether of bisphenol A 60 parts Diphenyl (4-phenylthiophenyl) sulfonium hexafluoroantimonate (photocationic polymerization initiator) 4 parts

Example 1
[Production of optically anisotropic film]
1. Formation of Photoalignment Film The composition (1) for forming a photoalignment film is applied to a polyethylene terephthalate film (1) (Diaphyl T 140 E 25 manufactured by Mitsubishi Resins Co., Ltd.) by a bar coating method, and it is held for 1 minute in an oven at 60 ° C. It was dried by heating. The resulting dried film was subjected to polarized UV irradiation treatment to form a photoalignment film (1) on the surface of the substrate. The polarized UV exposure was performed using a UV irradiation apparatus (SPOT CURE SP-7; manufactured by Ushio Inc.) at an integrated light quantity of 100 mJ / cm ² (based on 313 nm). The film thickness of the obtained photo alignment film (1) was 120 nm.

2. Formation of Liquid Crystal Cured Film The composition (1) for liquid crystal cured film formation is applied by a bar coat method to the surface of the obtained photo alignment film (1), heated and dried in an oven at 120 ° C. for 1 minute, and then to room temperature It cooled and obtained the dry film. The resulting dried film is irradiated with ultraviolet light at an exposure dose of 1000 mJ / cm ² (based on 365 nm) using a UV irradiation device (SPOT CURE SP-7; manufactured by Ushio Inc.), and the polymerizable liquid crystal compound is the substrate surface A cured liquid crystal cured film (1) was formed in a state of being oriented in the horizontal direction with respect to the inside, to obtain a transfer optically anisotropic sheet (1). It was 1.6 micrometers when the thickness of the formed liquid crystal cured film (1) was measured with the laser microscope (OLS3000 by Olympus Corporation).

3. Transfer of Liquid Crystal Cured Film The surface of the obtained liquid crystal cured film (1) was subjected to corona treatment, to which an active energy ray curable adhesive (1) was applied by bar coating, and the surface was corona treated thereon The pressure is applied to the Zeonor film, and the UV irradiation device (Unicure VB-15201BY-A, manufactured by Ushio Inc .; metal halide lamp UVL-1500M2-N1) is used from the polyethylene terephthalate film side, and the exposure dose is 1000 mJ / cm ² (based on 365 nm) Of ultraviolet light. By simultaneously removing the substrate of the optically anisotropic sheet for transfer (1) and the photo alignment film, the liquid crystal cured film is transferred onto the Zeonor film, and a laminate comprising the liquid crystal cured film (1), the adhesive layer and the Zeonor film I got the body (1). The thickness of the adhesive layer and the liquid crystal cured film (1) at this time was 4.1 μm.

4. Retardation Measurement The retardation value of the laminate (1) is measured in the wavelength range of 450 nm to 700 nm using a measuring instrument (KOBRA-WR, manufactured by Oji Scientific Instruments), and the retardation value of wavelength 450 nm is determined by the program attached to the device. The Re (450), the retardation value Re (550) at a wavelength of 550 nm, and the retardation value Re (650) at a wavelength of 650 nm were calculated to be the following values.
Re (450) = 97 nm
Re (550) = 112 nm
Re (650) = 115 nm
Re (450) / Re (550) = 0.87
Re (650) / Re (550) = 1.03
That is, the liquid crystal cured film (1) had optical properties represented by the following formulas (1) and (2). In addition, since the retardation value in wavelength 550nm of Zeonor film is about 0, it does not affect the relationship of the said in-plane retardation value.
Re (450) / Re (550) ≦ 1.00 (1)
1.00 ≦ Re (650) / Re (550) (2)

Reference Example 1
1. Formation of Liquid Crystal Cured Film In the same manner as in Example 1, a photo alignment film was formed on a polyethylene terephthalate film (1). The composition for forming a liquid crystal cured film (2) was coated on the photoalignment film by a bar coating method, dried by heating in an oven at 120 ° C. for 1 minute, and cooled to room temperature to obtain a dried film. The resulting dried film is irradiated with ultraviolet light at an exposure dose of 1000 mJ / cm ² (based on 365 nm) using a UV irradiation device (SPOT CURE SP-7; manufactured by Ushio Inc.), and the polymerizable liquid crystal compound is the substrate surface A cured liquid crystal cured film (2) was formed in a state of being oriented in a horizontal direction with respect to the inside, to obtain a transfer optically anisotropic sheet (2). It was 2.1 micrometers when the thickness of the formed liquid crystal cured film (2) was measured by the laser microscope (OLS3000 by Olympus Corporation).

2. Transfer of Optically Anisotropic Film The surface of the obtained liquid crystal cured film (2) is subjected to corona treatment, and then an active energy ray-curable adhesive (1) is applied thereto by bar coating, and the surface is corona-treated thereon. The pressure-treated Zeonor film is pressure-bonded, and an exposure amount of 1000 mJ / cm ² (365 nm) is measured from the polyethylene terephthalate film side using a UV irradiation device (Unicure VB-15201BY-A, manufactured by Ushio Inc .; metal halide lamp UVL-1500M2-N1). Irradiated with UV light. When the substrate was removed from the transfer optically anisotropic sheet (2), the adhesive layer was not cured, and the liquid crystal cured film (2) could not be transferred onto the Zeonor film.

Measurement of Transmittance The transmittance of the optically anisotropic films (1) and (2) was measured using a UV-visible spectrophotometer (UV-3150, manufactured by Shimadzu Corporation). Values of transmittance T (390 nm), T (400 nm) and T (550 nm) of the transfer optically anisotropic sheet when the transmittance of the transfer optically anisotropic sheet for a wavelength of 800 nm is 100%. It is shown in Table 1.

Transparency evaluation Polyethylene terephthalate film (1) as a substrate, optically anisotropic sheet for transfer (1), for transfer by double beam method using haze meter (model HZ-2) manufactured by Suga Test Instruments Co., Ltd. The haze values of the optically anisotropic sheet (2) and the laminate (1) were measured. The smaller the haze value, the better the transparency. The results are shown in Table 1.

  ADVANTAGE OF THE INVENTION According to this invention, the transfer of the optically anisotropic film containing a liquid-crystal cured film is easy, and the highly transparent optically anisotropic sheet for transfer and a laminated body can be obtained.

  According to the present invention, transfer of the optically anisotropic film containing the liquid crystal cured film is easy.

DESCRIPTION OF SYMBOLS 10 Liquid crystal display 12a, 12b Polarizing film 13a, 13b Retardation film 14a, 14b Base material 15 Color filter 16 Transparent electrode 17 Liquid crystal layer 18 Interlayer insulation film 19 Backlight unit 20 Black matrix 21 Thin film transistor 22 Pixel electrode 23 Spacer 30 EL display Device 31 Circularly polarizing plate 33 Base material 34 Interlayer insulating film 35 Pixel electrode 36 Organic functional layer 37 Cathode electrode 38 Desiccant 39 Sealing lid 40 Thin film transistor 41 Rib

Claims (8)

An optically anisotropic sheet for transfer, in which a substrate and a cured liquid crystal film are laminated,
The liquid crystal cured film is transferred from the substrate to the transferred material through the active energy ray curing adhesive,
The transmittances T (390 nm), T (400 nm) and T (550 nm) of the optically anisotropic sheet for transfer when the transmittance of the optically anisotropic sheet for transfer at a wavelength of 800 nm is 100% are as follows: An optically anisotropic sheet for transfer which satisfies the formulas (1) to (3).
35% <T (390 nm) <45% (1)
75% <T (400 nm) <85% (2)
95% <T (550 nm) <100% (3) The transfer optically anisotropic sheet according to claim 1, wherein the liquid crystal cured film has wavelength dispersion characteristics satisfying the following formulas (4) and (5).
Re (450) / Re (550) ≦ 1.00 (4)
1.00 ≦ Re (650) / Re (550) (5)
Re (450), Re (550), and Re (650) represent in-plane retardation values for light of wavelengths 450 nm, 550 nm, and 650 nm, respectively.   3. The optically anisotropic sheet for transfer according to claim 1, wherein the liquid crystal cured film has a thickness of 0.5 to 5 μm.   An adhesive layer comprising an active energy ray-curable adhesive is formed on the surface of the cured liquid crystal film of the optically anisotropic sheet according to any one of claims 1 to 3, and an object to be transferred is laminated thereon and activated. The laminated body obtained by removing the base material of the said optically anisotropic sheet after irradiating an energy beam. The laminate according to claim 4 active energy ray, the irradiation energy at a wavelength 365nm is 200 mJ / cm ² or more 1500 mJ / cm ² or less.   The laminate according to claim 4 or 5, wherein a light source of active energy rays is a metal halide lamp.   The haze value of a laminated body is 2% or less, The laminated body in any one of Claims 4-6.   The display apparatus provided with the laminated body in any one of Claims 4-7.

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