WO2019004041A1

WO2019004041A1 - Optical film

Info

Publication number: WO2019004041A1
Application number: PCT/JP2018/023582
Authority: WO
Inventors: 智恵阪上; 亜依小橋; 悠司淺津
Original assignee: 住友化学株式会社
Priority date: 2017-06-27
Filing date: 2018-06-21
Publication date: 2019-01-03
Also published as: JP7320926B2; JP2019008292A; KR20200019236A; TWI844515B; TW201910823A; CN110799865B; CN110799865A; KR102603487B1

Abstract

Provided is an optical film in which it is possible to suppress deterioration of a retardation film without a compound that selectively absorbs visible light having a short wavelength near 400 nm and is contained in a light-selective absorption layer migrating to a layer outside the light-selective absorption layer, and to which excellent display characteristics can be imparted. The optical film includes at least one layer of a light-selective absorption layer formed from an active-energy-ray-curable composition, and satisfies formula (1). Formula (1): A (405) ≥ 0.5 [In formula (1), A (405) represents the degree of absorbance at a wavelength of 405 nm.]

Description

Optical film

The present invention relates to an optical film comprising at least one light selective absorption layer.

Various members such as organic EL elements, display elements such as liquid crystal cells, and optical films such as polarizing plates are used in display devices (FPD: flat panel display) such as organic EL display devices and liquid crystal display devices. Since organic EL compounds and liquid crystal compounds used for these members are organic substances, deterioration by ultraviolet light (UV) tends to be a problem. In order to solve such a problem, for example, Patent Document 1 describes a polarizing plate in which an ultraviolet light absorber excellent in ultraviolet light absorbing ability in a wavelength range of 370 nm or less is added to a protective film of the polarizing plate.

Unexamined-Japanese-Patent No. 2006-308936

With the progress in thinning of display devices in recent years, development of a liquid crystal retardation film formed by aligning and photocuring a polymerizable liquid crystal compound has been promoted. It has become clear that these liquid crystal retardation films and organic EL light emitting devices tend not to deteriorate not only by ultraviolet light but also by visible light of short wavelength. However, even if the polarizing plate described in Patent Document 1 is excellent in ultraviolet absorbing ability in a wavelength range of 370 nm or less, the absorbing ability of visible light having a short wavelength around 400 nm is low, and liquid crystal retardation film and organic EL emission In some cases, the deterioration of the device may not be sufficiently suppressed.

Then, it examined whether degradation of a liquid-crystal type | system | group retardation film or an organic EL light emitting element could be suppressed by arrange | positioning the adhesive layer which has the absorption capability of the visible light of short wavelength around 400 nm. As a result of the examination, when the pressure-sensitive adhesive layer contains a compound having the ability to absorb visible light of short wavelength near 400 nm, the compound having the ability to absorb visible light of short wavelength near 400 nm contained in the pressure-sensitive adhesive layer It has become clear that there is a tendency to cause deterioration of the retardation film and the polarizing plate by transferring to the layer of

The present invention includes an invention described below [1] An optical film comprising at least one light selective absorption layer formed from an active energy ray-curable composition which provides an optical film, and satisfying the following formula (1) .
A (405) 0.5 0.5 (1)
[In Formula (1), A (405) represents the absorbance at a wavelength of 405 nm. ]
[2] The optical film according to [1], further satisfying the following formula (2).
A (440) ≦ 0.1 (2)
[In Formula (2), A (440) represents the light absorbency in wavelength 440nm. ]
[3] The optical film according to [1] or [2], which satisfies the following formula (3).
A (405) / A (440) ≧ 5 (3)
[In Formula (3), A (405) represents the absorbance at a wavelength of 405 nm, and A (440) represents the absorbance at a wavelength of 440 nm. ]
[4] The optical film according to any one of [1] to [3], wherein the storage elastic modulus E at 23 ° C. of the light selective absorption layer is 100 MPa or more.
[5] The photoselective absorption layer is a layer formed from an active energy ray curable composition containing a photocurable component (A), a photoselective absorption compound (B) and a photopolymerization initiator (C) [ The content of the layer [6] photoselective absorption compound (B) according to any one of 1) to [4] is 0.01 to 20 parts by mass with respect to 100 parts by mass of the photocurable component (A) The optical film according to [5].
[7] The optical film according to [5] or [6], wherein the photoselective absorption compound (B) is a compound satisfying the following formula (4).
ε (405) 20 20 (4)
[In Formula (4), (epsilon) (405) represents the gram absorption coefficient of a compound in wavelength 405 nm. The unit of gram absorption coefficient is L / (g · cm). ]
[8] The optical film according to [7], wherein the light selective absorption compound (B) is a compound satisfying the formula (5).
ε (405) / ε (440) ≧ 20 (5)
[In Formula (5), (epsilon) (405) represents the gram absorption coefficient of the compound in wavelength 405 nm, and (epsilon) (440) represents the gram absorption coefficient in wavelength 440 nm. ]
[9] The optical film according to any one of [6] to [8], wherein the photocurable component (A) contains at least one selected from the group consisting of (meth) acryloyloxy group-containing compounds and epoxy compounds.
[10] An optical film with an adhesive layer having an adhesive layer on at least one surface of the optical film according to any one of [1] to [9].
The display apparatus which has an optical film with an adhesive layer as described in [11] [10].

In the optical film of the present invention, the compound selectively absorbing visible light with a short wavelength near 400 nm contained in the light selective absorption layer does not shift to a layer other than the light selective absorption layer, and suppresses the deterioration of the retardation film And can provide good display characteristics.

It is a schematic sectional drawing which shows an example of the optical film which concerns on this invention. It is a schematic sectional drawing which shows an example of the laminated constitution of the optical laminated body which concerns on this invention. It is a schematic sectional drawing which shows an example of the laminated constitution of the optical laminated body which concerns on this invention. It is a schematic sectional drawing which shows an example of the laminated constitution of the optical laminated body which concerns on this invention. It is a schematic sectional drawing which shows an example of the laminated constitution of the optical laminated body which concerns on this invention. It is a schematic sectional drawing which shows an example of the laminated constitution of the optical laminated body which concerns on this invention.

Hereinafter, embodiments of the present invention will be described in detail. The scope of the present invention is not limited to the embodiments described herein, and various modifications can be made without departing from the spirit of the present invention.

The optical film of the present invention is an optical film including at least one light selective absorption layer formed from an active energy ray curable resin composition and satisfying the following formula (1).
A (405) 0.5 0.5 (1)
[Represents the absorbance of the optical film at a wavelength of 405 nm. ]
The larger the value of A (405), the larger the absorption at a wavelength of 405 nm. When the value of A (405) is less than 1, the absorption at a wavelength of 405 nm is low, and the effect of suppressing deterioration of a display device such as a retardation film or an organic EL element in visible light of short wavelength is small. The value of A (405) is preferably 0.6 or more, more preferably 0.8 or more, and particularly preferably 1.0 or more, from the viewpoint of suppressing weathering deterioration.

The optical film of the present invention preferably further satisfies the following formula (2).
A (440) ≦ 0.1 (2)
[In Formula (2), A (440) represents the light absorbency in wavelength 440nm. ]
The smaller the value of A (440), the lower the absorption at a wavelength of 440 nm. When the value of A (440) exceeds 0.1, it tends to impair good color expression in the display device. In addition, since the light emission of the display device tends to be inhibited, the luminance of the display device may also be reduced. The value of A (440) is preferably 0.05 or less, more preferably 0.04 or less, and particularly preferably 0.03 or less from the viewpoint of suppressing light emission inhibition of the display device.

It is preferable that the optical film of this invention further satisfy | fills Formula (3).
The optical film of

Claim

1 or 2 which satisfy | fills following formula (3).
A (405) / A (440) ≧ 5 (3)
[In Formula (3), A (405) represents the absorbance at a wavelength of 405 nm, and A (440) represents the absorbance at a wavelength of 440 nm. ]
The value of A (405) / A (440) represents the magnitude of absorption at a wavelength of 405 nm relative to the magnitude of absorption at a wavelength of 440 nm. As the value of A (405) / A (440) is larger, it indicates that there is specific absorption in the wavelength range around 405 nm. The value of A (405) / A (440) is preferably 10 or more, more preferably 30 or more, and particularly preferably 60 or more.

<Optical laminate of the present invention>
The cross-sectional schematic diagram of an example of the laminated constitution of the optical laminated body of this invention was shown in FIG.
In the optical film 10 of the present invention shown in FIG. 1, the light selective absorption layer 1 is formed on at least one surface of a resin film 2 (for example, a resin film (a) described later). The light selective absorption layer 1 may be a single layer or a multilayer. In addition, an adhesive layer or a pressure-sensitive adhesive layer may be present between the resin film 2 and the light selective absorption layer 1. The adhesive layer in this case may be an adhesive layer formed of a known adhesive (water-based adhesive, active energy ray curing adhesive), and an adhesive layer is also formed of a known adhesive. It is sufficient if it is an agent layer.

The optical laminate 10A described in FIG. 2 is an optical laminate including the optical film 10 of the present invention and a polarizing plate film. The light selective absorption layer 1 shown in FIG. 2 also functions as an adhesive layer.
The optical laminate 10B described in FIG. 3 is an optical laminate including a resin film 2, a light selective absorption layer 1, a polarizing film 3, an adhesive layer 4, and a protective film 5. The adhesive layer 4 may be an adhesive layer formed of a known adhesive, or the light selective absorption layer 2 of the present application may be used as an adhesive layer. The protective film 5 may be a film having retardation (retardation film).
The optical laminate 10C described in FIG. 4 and the optical laminate 10D described in FIG. 5 are resin film 2, light selective absorption layer 1, polarizing film 3, adhesive layer 4, protective film 5, adhesive layer 6, optical The optical laminate includes the film 40, the pressure-sensitive adhesive layer 30, and the light emitting element 110. The adhesive layer 4 may be an adhesive layer formed of a known adhesive, or the light selective absorption layer 2 of the present application may be used as an adhesive layer.
The optical laminate 10E described in FIG. 6 is an optical laminate including the light selective absorption layer 1, the resin film 2, the adhesive layer 4, the polarizing film 3, the adhesive layer 4, and the resin film 2. In FIG. 6, the light selective absorption layer 1 also functions as a surface treatment layer.
That is, the light selective absorption layer 1 of the present invention functions as an adhesive layer and also functions as a surface treatment layer.

The thickness of the light selective absorption layer 1 of the present invention is usually 0.1 to 30 μm.
When the light selective absorption layer 1 is used as a surface treatment layer, the thickness is preferably 5 to 15 μm. If it is less than 5 μm, the hardness may be insufficient. If it exceeds 15 μm, residual solvent may remain or coating adhesion may be reduced.
When the light selective absorption layer 1 is used as an adhesive layer, the thickness is usually 20 μm or less, preferably 10 μm or less, more preferably 5 μm or less, particularly preferably 3 μm or less.

The storage elastic modulus (E ‘) at 23 ° C. of the light selective absorption layer is preferably 100 MPa or more, more preferably 500 MPa or more, still more preferably 1000 MPa or more, and preferably 100000 MPa or less. The storage elastic modulus at 80 ° C. of the light selective absorption layer is preferably 600 MPa or more, more preferably 1000 MPa or more, still more preferably 1500 MPa or more, and preferably 10000 MPa or less.

When the light selective absorption layer 1 functions as a surface-treated film, the hardness of the light selective absorption layer is preferably H or more in a pencil hardness test (load 4.9 N) according to JIS K 5600-5-4 (1999). 3H or more is more preferable, and 4H or more is even more preferable.

<Selective absorption layer>
The optical film of the present invention comprises at least one light selective absorption layer formed from an active energy ray-curable composition. By including the light selective absorption layer, the optical film of the present invention satisfies the formula (1). The light selective absorption layer preferably satisfies the above-mentioned formula (1), more preferably the above-mentioned formulas (1) and (2), and the above-mentioned formulas (1), (2) and It is further preferable to satisfy 3).
The light selective absorption layer is formed on at least one surface of a resin film (hereinafter sometimes referred to as a resin film (a)).

An active energy ray curable composition refers to a composition that cures upon irradiation with active energy rays. As an active energy ray, an ultraviolet ray, an electron beam, an X ray, visible light etc. are mentioned, Preferably it is an ultraviolet ray. As an ultraviolet light source, a light source having a light emission distribution at a wavelength of 400 nm or less is preferable. For example, low pressure mercury lamp, medium pressure mercury lamp, high pressure mercury lamp, ultra high pressure mercury lamp, chemical lamp, black light lamp, microwave excitation mercury lamp, metal halide lamp etc. be able to.
The active energy ray curable composition contains a photocurable component (A), a photoselective absorption compound (B) and a photopolymerization initiator (C).

As the photocurable component (A), a compound or oligomer (radically polymerizable compound) that cures by radical polymerization reaction upon irradiation with active energy rays, and / or a compound that cures by cationic polymerization reaction upon irradiation with active energy rays (cationic polymerization Sex compounds) and the like.

<Radical polymerizable compound>
Examples of the radically polymerizable compound include radically polymerizable (meth) acrylic compounds. In the present specification, the term "(meth) acrylic compound" refers to a compound having one or more (meth) acryloyl groups in the molecule. The “(meth) acryloyl group” means at least one selected from an acryloyl group and a methacryloyl group. The same applies to the cases of “(meth) acryloyloxy group”, “(meth) acrylic”, “(meth) acrylate” and the like. The active energy ray-curable adhesive composition can contain one or more radically polymerizable (meth) acrylic compounds.

As the (meth) acrylic compound, (meth) acrylate monomers having at least one (meth) acryloyloxy group in the molecule, (meth) acrylamide monomers, and at least two (meth) acryloyl groups in the molecule And (meth) acryloyl group-containing compounds such as (meth) acrylic oligomers having The (meth) acrylic oligomer is preferably a (meth) acrylate oligomer having at least two (meth) acryloyloxy groups in the molecule. As the (meth) acrylic compounds, one type may be used alone, or two or more types may be used in combination.

As the (meth) acrylate monomer, a monofunctional (meth) acrylate monomer having one (meth) acryloyloxy group in the molecule, and a bifunctional (meth) acrylate having two (meth) acryloyloxy groups in the molecule Monomers and polyfunctional (meth) acrylate monomers having three or more (meth) acryloyloxy groups in the molecule can be mentioned.

Examples of monofunctional (meth) acrylate monomers include alkyl (meth) acrylates. In the alkyl (meth) acrylate, the alkyl group may be linear, branched or cyclic as long as it has 3 or more carbon atoms. As the alkyl (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl ( Meta) acrylate etc. are mentioned. In addition, as monofunctional (meth) acrylate monomers, aralkyl (meth) acrylates such as benzyl (meth) acrylate; (meth) acrylates of terpene alcohols such as isobornyl (meth) acrylate; tetrahydro such as tetrahydrofurfuryl (meth) acrylate (Meth) acrylates having a furfuryl structure; Cycloalkyl groups such as cyclohexyl (meth) acrylate, cyclohexylmethyl methacrylate, dicyclopentanyl acrylate, dicyclopentenyl (meth) acrylate, 1,4-cyclohexanedimethanol monoacrylate, etc. (Meth) acrylates having an alkyl group; aminoalkyl (meth) acrylates such as N, N-dimethylaminoethyl (meth) acrylate; 2-phenoxyethyl (meth) acrylate ) Acrylate, dicyclopentenyl oxyethyl (meth) acrylate, ethyl carbitol (meth) acrylate, (meth) acrylate having an ether bond in the alkyl moiety such as phenoxy polyethylene glycol (meth) acrylates are also equal may also be mentioned.

Furthermore, as a functional (meth) acrylate monomer, the monofunctional (meth) acrylate which has a hydroxyl group in an alkyl part; The monofunctional (meth) acrylate which has a carboxyl group in an alkyl part is mentioned. As a monofunctional (meth) acrylate having a hydroxyl group at the alkyl site, 2-hydroxyethyl (meth) acrylate, 2- or 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2-hydroxy-3 -Phenoxy propyl (meth) acrylate, trimethylol propane mono (meth) acrylate, pentaerythritol mono (meth) acrylate are mentioned. Examples of monofunctional (meth) acrylates having a carboxyl group at the alkyl site include 2-carboxyethyl (meth) acrylate, ω-carboxy-polycaprolactone (n = 2) mono (meth) acrylate, 1- [2- (meth) acrylate Acryloyloxyethyl! Phthalic acid, 1- [2- (meth) acryloyloxyethyl] hexahydrophthalic acid, 1- [2- (meth) acryloyloxyethyl] succinic acid, 4- [2- (meth) acryloyloxyethyl ] Trimellitic acid, N- (meth) acryloyloxy-N ', N'-dicarboxymethyl-p-phenylenediamine and the like can be mentioned.

The (meth) acrylamide monomer is preferably a (meth) acrylamide having a substituent at the N-position. A typical example of the substituent at the N-position is an alkyl group, but it may form a ring together with the nitrogen atom of (meth) acrylamide, and this ring is a carbon atom and the nitrogen atom of (meth) acrylamide And may have an oxygen atom as a ring member. Furthermore, a substituent such as alkyl or oxo (= O) may be bonded to a carbon atom constituting the ring.

Examples of N-substituted (meth) acrylamides include N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N-isopropyl (meth) acrylamide, Nn-butyl (meth) acrylamide, N-t-butyl ( N-alkyl (meth) acrylamide such as acrylamide, N-hexyl (meth) acrylamide; N, N- dialkyl (such as N, N- dimethyl (meth) acrylamide, N, N- diethyl (meth) acrylamide Meta) acrylamide etc. are mentioned. Further, the N-substituent may be an alkyl group having a hydroxyl group, and examples thereof include N-hydroxymethyl (meth) acrylamide, N- (2-hydroxyethyl) (meth) acrylamide, N- (2-hydroxy) Propyl) (meth) acrylamide etc. are mentioned. Furthermore, specific examples of the above-mentioned N-substituted (meth) acrylamide forming a 5- or 6-membered ring include N-acryloyl pyrrolidine, 3-acryloyl-2-oxazolidinone, 4-acryloyl morpholine, and N-acryloyl pyrrolidone. Examples include piperidine, N-methacryloylpiperidine and the like.

As a bifunctional (meth) acrylate monomer,
Ethylene glycol di (meth) acrylate, 1,3-butanediol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol Alkylene glycol di (meth) acrylates such as di (meth) acrylates and neopentyl glycol di (meth) acrylates;
Diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate and Polyoxyalkylene glycol di (meth) acrylates such as polytetramethylene glycol di (meth) acrylate;
Di (meth) acrylate of halogen substituted alkylene glycol such as tetrafluoroethylene glycol di (meth) acrylate;
Di (meth) acrylates of aliphatic polyols such as trimethylolpropane di (meth) acrylate, ditrimethylolpropane di (meth) acrylate, pentaerythritol di (meth) acrylate;
Hydrogenated dicyclopentadiene or di (meth) acrylate of tricyclodecane dialkanol such as hydrogenated dicyclopentadienyl di (meth) acrylate, tricyclodecane dimethanol di (meth) acrylate;
Dioxane glycol or di (meth) acrylate of dioxane dialkanol such as 1,3-dioxane-2,5-diyl di (meth) acrylate (alias: dioxane glycol di (meth) acrylate);
A di (meth) acrylate of an alkylene oxide adduct of bisphenol A or bisphenol F, such as a bisphenol A ethylene oxide adduct diacrylate or a bisphenol F ethylene oxide adduct diacrylate;
Epoxy di (meth) acrylates of bisphenol A or bisphenol F such as acrylic acid adducts of bisphenol A diglycidyl ether, acrylic acid adducts of bisphenol F diglycidyl ether, silicone di (meth) acrylates;
Di (meth) acrylate of hydroxypivalic acid neopentyl glycol ester;
2,2-bis [4- (meth) acryloyloxyethoxyethoxyphenyl] propane; 2,2-bis [4- (meth) acryloyloxyethoxyethoxycyclohexyl] propane;
2- (2-hydroxy-1,1-dimethylethyl) -5-ethyl-5-hydroxymethyl-1,3-dioxane] di (meth) acrylate;
Tris (hydroxyethyl) isocyanurate di (meth) acrylate; and the like.

As trifunctional or higher polyfunctional (meth) acrylate monomers, glycerin tri (meth) acrylate, alkoxylated glycerin tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tri (meth) acrylate, ditrimethylol Propane tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate, etc. Trifunctional or higher aliphatic polyol poly (meth) acrylate; trifunctional or higher halogen substituted polyol poly (meth) acrylate; glycerin Tri (meth) acrylate of alkylene oxide adduct; tri (meth) acrylate of alkylene oxide adduct of trimethylolpropane; 1,1,1-tris [(meth) acryloyloxyethoxyethoxy] propane; tris (hydroxyethyl) isocyanate A nurate tri (meth) acrylate etc. are mentioned.

Examples of (meth) acrylic oligomers include urethane (meth) acrylic oligomers, polyester (meth) acrylic oligomers, epoxy (meth) acrylic oligomers and the like.

The urethane (meth) acrylic oligomer is a compound having a urethane bond (—NHCOO—) and at least two (meth) acryloyl groups in the molecule. Specifically, a urethanization reaction product of a hydroxyl group-containing (meth) acrylic monomer having at least one (meth) acryloyl group and at least one hydroxyl group in the molecule and a polyisocyanate, or a polyol with a polyisocyanate It may be a urethanated reaction product of a terminal isocyanato group-containing urethane compound obtained by reaction, and a (meth) acrylic monomer having at least one (meth) acryloyl group and at least one hydroxyl group in the molecule. .

The hydroxyl group-containing (meth) acrylic monomer used for the urethanization reaction can be, for example, a hydroxyl group-containing (meth) acrylate monomer, and specific examples thereof include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate ) Acrylate, 2-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, glycerin di (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, di And pentaerythritol penta (meth) acrylate. Specific examples other than the hydroxyl group-containing (meth) acrylate monomer include N-hydroxyalkyl (meth) acrylamide monomers such as N-hydroxyethyl (meth) acrylamide and N-methylol (meth) acrylamide.

Among polyisocyanates to be subjected to the urethanization reaction with a hydroxyl group-containing (meth) acrylic monomer, hexamethylene diisocyanate, lysine diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, tolylene diisocyanate, xylylene diisocyanate, and aromatic ones of these diisocyanates Diisocyanates obtained by hydrogenating isocyanates (for example, hydrogenated tolylene diisocyanate, hydrogenated xylylene diisocyanate, etc.), di- or tri-isocyanates such as triphenylmethane triisocyanate, dibenzyl benzene triisocyanate, and the above The polyisocyanate etc. which are obtained by multimerizing the diisocyanate of this are mentioned.

In addition to the aromatic, aliphatic or alicyclic polyols, polyester polyols, polyether polyols, etc. may be used as the polyol to be used to make the terminal isocyanate group-containing urethane compound by the reaction with the polyisocyanate. it can. Examples of aliphatic and alicyclic polyols include 1,4-butanediol, 1,6-hexanediol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, neopentyl glycol, trimethylolethane, trimethylolpropane, and ditriol. Methylol propane, pentaerythritol, dipentaerythritol, dimethylol heptane, dimethylol propionic acid, dimethylol butanoic acid, glycerin, hydrogenated bisphenol A and the like can be mentioned.

The polyester polyol is obtained by the dehydration condensation reaction of the above-described polyol and a polybasic carboxylic acid or an anhydride thereof. When examples of polybasic carboxylic acids or their anhydrides are represented by adding "(anhydride)" to those which may be anhydrides, (anhydride) succinic acid, adipic acid, (anhydride) maleic acid (anhydride) Itaconic acid, (anhydride) trimellitic acid, (anhydride) pyromellitic acid, (anhydride) phthalic acid, isophthalic acid, terephthalic acid, hexahydro (anhydride) phthalic acid and the like.

The polyether polyol may be, in addition to the polyalkylene glycol, the above-mentioned polyol or a polyoxyalkylene modified polyol obtained by the reaction of dihydroxybenzenes with an alkylene oxide.

The polyester (meth) acrylate oligomer means an oligomer having an ester bond and at least two (meth) acryloyloxy groups in the molecule.
The polyester (meth) acrylate oligomer can be obtained, for example, by subjecting a (meth) acrylic acid, a polybasic carboxylic acid or an anhydride thereof, and a polyol to a dehydration condensation reaction.
As polybasic carboxylic acid or its anhydride, succinic anhydride, adipic acid, maleic anhydride, itaconic anhydride, trimellitic anhydride, pyromellitic anhydride, hexahydrophthalic anhydride, phthalic acid, succinic acid, maleic acid And itaconic acid, trimellitic acid, pyromellitic acid, hexahydrophthalic acid, phthalic acid, isophthalic acid, terephthalic acid and the like.
As the polyol, 1,4-butanediol, 1,6-hexanediol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, neopentyl glycol, trimethylol ethane, trimethylol propane, ditrimethylol propane, pentaerythritol, di- Pentaerythritol, dimethylolheptane, dimethylolpropionic acid, dimethylolbutanoic acid, glycerin, hydrogenated bisphenol A and the like can be mentioned.

Epoxy (meth) acrylic oligomers can be obtained by the addition reaction of polyglycidyl ether and (meth) acrylic acid. Epoxy (meth) acrylic oligomers have at least two (meth) acryloyloxy groups in the molecule.
Examples of polyglycidyl ethers include ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, and bisphenol A diglycidyl ether.

When using a photoselective absorption layer as a surface treatment layer, the total content of the bifunctional (meth) acrylate monomer and the polyfunctional (meth) acrylate monomer is a photocurable component (A) in order to increase the hardness of the photoselective absorption layer. The amount is 50 parts by mass or more, preferably 60 parts by mass or more, and more preferably 80 parts by mass or more based on 100 parts by mass.
When the photoselective absorption layer is used as an adhesive layer, the content of the monofunctional (meth) acrylate monomer is preferably 50 parts by mass or more, preferably 100 parts by mass of the photocurable component (A), from the viewpoint of adhesion. 60 parts by mass or more, more preferably 60 parts by mass or more.

[Cationic Polymerizable Compound]
The cationically polymerizable compound represents a compound or an oligomer which is cured by the cationic polymerization reaction proceeding by irradiation with an active energy ray such as ultraviolet light, visible light, electron beam, X-ray or the like and heating. As a cationically polymerizable compound, an epoxy compound, an oxetane compound, a vinyl compound etc. are mentioned. The cationically polymerizable compound is preferably an epoxy compound. The epoxy compound is a compound having one or more (preferably two or more) epoxy groups in the molecule. The epoxy compounds may be used alone or in combination of two or more.
As an epoxy compound, an alicyclic epoxy compound, an aromatic epoxy compound, a hydrogenated epoxy compound, an aliphatic epoxy compound etc. can be mentioned. Among them, from the viewpoint of weatherability, curing speed and adhesiveness, the epoxy compound is preferably an alicyclic epoxy compound and an aliphatic epoxy compound, and more preferably an alicyclic epoxy compound.

The alicyclic epoxy compound is a compound having one or more epoxy groups bonded to an alicyclic ring in the molecule. The “epoxy group bonded to an alicyclic ring” means a bridging oxygen atom —O— in a structure represented by the following formula (I). In the following formula (I), m is an integer of 2 to 5.

A compound in which one or more hydrogen atoms in (CH ₂ ) _m in the above-mentioned formula (I) are removed and which is bonded to another chemical structure may be a cycloaliphatic epoxy compound. One or more hydrogen atoms in (CH ₂ ) _m may be optionally substituted by a linear alkyl group such as a methyl group or an ethyl group.

Among them, an alicyclic epoxy compound having an epoxy cyclopentane structure (in the above formula (I) with m = 3) or an epoxy cyclohexane structure (in the above formula (I) with m = 4) is a glass of a cured product The transition temperature is high, which is also advantageous in terms of adhesion. Hereinafter, specific examples of the alicyclic epoxy compound will be listed. Here, first, the compound name is listed, and then the corresponding chemical formula is shown, and the compound name and the corresponding chemical formula are given the same reference numerals.

A: 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexane carboxylate,
B: 3,4-epoxy-6-methylcyclohexylmethyl 3,4-epoxy-6-methylcyclohexanecarboxylate,
C: ethylene bis (3,4-epoxycyclohexane carboxylate),
D: Bis (3,4-epoxycyclohexylmethyl) adipate,
E: bis (3,4-epoxy-6-methylcyclohexylmethyl) adipate,
F: diethylene glycol bis (3,4-epoxycyclohexyl methyl ether),
G: ethylene glycol bis (3,4-epoxycyclohexyl methyl ether),
H: 2,3,14,15-diepoxy-7,11,18,21-tetraoxatrispiro [5.2.2.5.2.2] henicosane,
I: 3- (3,4-epoxycyclohexyl) -8,9-epoxy-1,5-dioxaspiro [5.5] undecane,
J: 4-vinylcyclohexene dioxide,
K: limonene dioxide,
L: bis (2,3-epoxycyclopentyl) ether,
M: dicyclopentadiene dioxide.

The aromatic epoxy compound is a compound having an aromatic ring and an epoxy group in the molecule. As aromatic epoxy compounds, bisphenol-type epoxy compounds such as diglycidyl ether of bisphenol A, diglycidyl ether of bisferr F, diglycidyl ether of bisphenol S, or oligomers thereof; phenol novolac epoxy resin, cresol novolac epoxy resin, hydroxybenzaldehyde Novolac type epoxy resin such as phenol novolac epoxy resin; glycidyl ether of 2,2 ', 4,4'-tetrahydroxydiphenylmethane, and polyfunctional type such as glycidyl ether of 2,2', 4,4'-tetrahydroxybenzophenone And epoxy resins of epoxy resins such as epoxidized polyvinyl phenol.

The hydrogenated epoxy compound is a glycidyl ether of a polyol having an alicyclic ring, and is a nucleus-hydrogenated poly obtained by selectively performing a hydrogenation reaction on an aromatic ring under pressure in the presence of a catalyst and an aromatic polyol. It can be obtained by glycidyl etherification of a hydroxy compound. Specific examples of the aromatic polyol are, for example, bisphenol type compounds such as bisphenol A, bisphor F, bisphenol S; novolac resins such as phenol novolac resin, cresol novolac resin, hydroxybenzaldehyde phenol novolac resin; tetrahydroxydiphenylmethane, tetrahydroxy It includes polyfunctional compounds such as benzophenone and polyvinylphenol. A glycidyl ether can be obtained by reacting epichlorohydrin with an alicyclic polyol obtained by subjecting the aromatic ring of an aromatic polyol to a hydrogenation reaction. Among the hydrogenated epoxy compounds, preferred is a diglycidyl ether of hydrogenated bisphenol A.

The aliphatic epoxy compound is a compound having at least one oxirane ring (three-membered cyclic ether) bonded to an aliphatic carbon atom in the molecule. For example, monofunctional epoxy compounds such as butyl glycidyl ether and 2-ethylhexyl glycidyl ether; and difunctional ones such as 1,4-butanediol diglycidyl ether, 1,6-hexanediol diglycidyl ether and neopentyl glycol diglycidyl ether Epoxy compounds; trifunctional or higher epoxy compounds such as trimethylolpropane triglycidyl ether and pentaerythritol tetraglycidyl ether; and one epoxy group directly bonded to an alicyclic ring such as 4-vinylcyclohexene dioxide and limonene dioxide And epoxy compounds having an oxirane ring bonded to an aliphatic carbon atom. Among them, a bifunctional epoxy compound (also referred to as an aliphatic diepoxy compound) having two oxirane rings bonded to an aliphatic carbon atom in the molecule is preferable from the viewpoint of adhesiveness. Such a suitable aliphatic diepoxy compound can be represented, for example, by the following formula (II).

Y in the above formula (II) is an alkylene group having 2 to 9 carbon atoms, an alkylene group having 4 to 9 carbon atoms in total having an ether bond, or a divalent carbon number having 6 to 18 carbon atoms having an alicyclic structure. Is a hydrocarbon group of

Examples of aliphatic diepoxy compounds represented by the above formula (II) include diglycidyl ethers of alkanediols, diglycidyl ethers of oligoalkylene glycols having a repeating number up to about 4, or diglycidyl ethers of alicyclic diols. .

An oxetane compound is a compound containing one or more oxetane rings (oxetanyl groups) in the molecule. Examples of oxetane compounds include 3-ethyl-3-hydroxymethyl oxetane, 2-ethylhexyl oxetane, 1,4-bis [{(3-ethyloxetan-3-yl) methoxy} methyl] benzene, 3-ethyl-3 [{{ (3-ethyloxetan-3-yl) methoxy} methyl] oxetane, 3-ethyl-3- (phenoxymethyl) oxetane, 3- (cyclohexyloxy) methyl-3-ethyloxetane and the like. The oxetane compound may be used as a main component of the cationically polymerizable compound, or may be used in combination with an epoxy compound. By using an oxetane compound in combination, the curing speed and the adhesion may be improved.

The vinyl compounds include aliphatic or alicyclic vinyl ether compounds. Examples of the vinyl compound include alkyls having 5 to 20 carbon atoms such as n-amyl vinyl ether, i-amyl vinyl ether, n-hexyl vinyl ether, n-octyl vinyl ether, 2-ethylhexyl vinyl ether, n-dodecyl vinyl ether, stearyl vinyl ether, oleyl vinyl ether, etc. Vinyl ethers of alkenyl alcohols; hydroxyl group-containing vinyl ethers such as 2-hydroxyethyl vinyl ether, 3-hydroxypropyl vinyl ether, 4-hydroxybutyl vinyl ether; aliphatic rings or aromatics such as cyclohexyl vinyl ether, 2-methylcyclohexyl vinyl ether, cyclohexyl methyl vinyl ether, benzyl vinyl ether Vinyl ethers of monoalcohols having an aliphatic ring; glycerol monovinyl ether , 1,4-butanediol monovinyl ether, 1,4-butanediol divinyl ether, 1,6-hexanediol divinyl ether, neopentyl glycol divinyl ether, pentaerythritol divinyl ether, pentaerythritol tetravinyl ether, trimethylolpropane divinyl ether Of polyhydric alcohols such as trimethylolpropane trivinyl ether, 1,4-dihydroxycyclohexane monovinyl ether, 1,4-dihydroxycyclohexane divinyl ether, 1,4-dihydroxymethyl cyclohexane monovinyl ether and 1,4-dihydroxymethyl cyclohexane divinyl ether Mono-polyvinyl ether; diethylene glycol divinyl ether, triethylene glycol divinyl Ethers, polyalkylene glycol mono-divinyl ether and diethylene glycol monobutyl monovinyl ethers; glycidyl ether, ethylene glycol vinyl methacrylate.
The vinyl compound may be used as a main component of the cationically polymerizable compound, or may be used in combination with an epoxy compound, or an epoxy compound and an oxetane compound. By using a vinyl compound in combination, it may be possible to improve the curing speed and the viscosity reduction of the adhesive.

The photocurable component (A) may use a radically polymerizable compound and a cationically polymerizable compound in combination.
The content of the photocurable component (A) is usually 50 to 99.5% by mass, preferably 70 to 97% by mass, with respect to 100% by mass of the active energy ray-curable composition.

<Selective light selective compound (B)>
The light selective absorption compound (B) is a compound that selectively absorbs light of a wavelength of 405 nm, is preferably a compound that satisfies the formula (5), and is further a compound that satisfies the formula (6) preferable.
ε (405) 20 20 (5)
[In Formula (5), (epsilon) (405) represents the gram absorption coefficient of the compound in wavelength 405 nm. The unit of gram absorption coefficient is L / (g · cm). ]
ε (405) / ε (440) ≧ 20 (6)
[In Formula (6), (epsilon) (405) represents the gram absorption coefficient of the compound in wavelength 405 nm, and (epsilon) (440) represents the gram absorption coefficient in wavelength 440 nm. ]
The gram absorbance coefficient is measured by the method described in the examples.

The larger the value of ε (405) is, the easier it is to absorb light with a wavelength of 405 nm, and it is easy to exhibit the function of suppressing deterioration by ultraviolet light or visible light of short wavelength. When the value of ε (405) is less than 20 L / (g · cm), in the light absorption selective layer in order to exhibit the function of suppressing deterioration of the retardation film or the organic EL light emitting device due to ultraviolet light or short wavelength visible light The content of the photoselective absorption compound (B) is increased. When the content of the light selective absorption compound (B) is increased, the light selective absorption compound (B) may be bled out or dispersed unevenly, and the light absorption function may be insufficient. The value of ε (405) is preferably 20 L / (g · cm) or more, more preferably 30 L / (g · cm) or more, and even more preferably 40 L / (g · cm) or more Preferably, it is usually 500 L / (g · cm) or less.

A compound having a larger value of ε (405) / ε (440) absorbs light in the vicinity of 405 nm without inhibiting color expression of the display device, and suppresses light deterioration of the display device such as a retardation film or an organic EL element can do. The value of ε (405) / ε (440) is preferably 20 or more, more preferably 40 or more, still more preferably 70 or more, and particularly preferably 80 or more.

Further, the photoselective absorption compound (B) is preferably a compound containing a merocyanine structure in the molecule. The compound having a merocyanine structure is a compound containing in its molecule a partial structure represented by-(N-C = C-C = C)-, and examples thereof include merocyanine compounds, cyanine compounds and indoles. Examples include compounds based on the type and benzotriazole type compounds.
The light selective absorption compound (B) is preferably a compound represented by the formula (I) (hereinafter sometimes referred to as a compound (I)).

[Wherein, R ¹ and R ⁵ each independently represent a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or 7 to carbon atoms which may have a substituent; 15 represent an aralkyl group, an aryl group having a carbon number of 6 to 15, and a heterocyclic group, and -CH _2- contained in the alkyl group or the aralkyl group is -NR ^1A- , -CO-, -SO _2- , -O It may be substituted by-or -S-.
R ^1A represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
R ² , R ³ and R ⁴ each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms which may have a substituent, or an aromatic hydrocarbon group which may have a substituent Or an aromatic heterocyclic group which may have a substituent, and -CH _2- contained in the alkyl group is -NR ^1B- , -CO-, -NO _2- , -O- or -S- And may be substituted.
R ^1B represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
R ⁶ and R ⁷ each independently represent a hydrogen atom, an alkyl group having 1 to 25 carbon atoms, or an electron-withdrawing group, or R ⁶ and R ⁷ may be linked to each other to form a ring structure .
R ¹ and R ² may be linked to each other to form a ring structure, and R ² and R ³ may be linked to each other to form a ring structure, and R ² and R ⁴ are linked to each other to form a ring structure And R ³ and R ⁶ may be linked to each other to form a ring structure. ]

Examples of the alkyl group having 1 to 25 carbon atoms represented by R ¹ and R ⁵ include methyl group, ethyl group, n-propyl group, isopropyl group, 2-cyanopropyl group, n-butyl group, tert-butyl group, and sec-butyl, n-pentyl, n-hexyl, 1-methylbutyl, 3-methylbutyl, n-octyl, n-decyl, 2-hexyl-octyl and the like.
Examples of the substituent which the alkyl group having 1 to 25 carbon atoms represented by R ¹ and R ⁵ may have include the groups described in the following group A.
Group A: nitro, hydroxy, carboxy, sulfo, cyano, amino, halogen, alkoxy having 1 to 6 carbons, alkylsilyl having 1 to 12 carbons, alkyl having 2 to 8 carbons carbonyl ^{^{_{group, * - R a1 - (O}}} -R a2) t1 -R a3 (R a1 and ^{R a2} each independently represent an alkanediyl group having 1 to 6 carbon ^{atoms, R a3} is a C1- 6 represents an alkyl group, and s 1 represents an integer of 1 to 3.) and the like.
Examples of the alkylsilyl group having 1 to 12 carbon atoms include monoalkylsilyl groups such as methylsilyl group, ethylsilyl and propylsilyl groups; dialkylsilyl groups such as dimethylsilyl group, diethylsilyl group and methylethylsilyl group; trimethylsilyl and triethylsilyl, And trialkylsilyl groups such as tripropylsilyl group.
Examples of the alkylcarbonyl group having 2 to 8 carbon atoms include a methylcarbonyl group and an ethylcarbonyl group.
As a halogen atom, a fluorine atom, a chlorine atom, a bromine atom etc. are mentioned.

Examples of the aralkyl group having 7 to 15 carbon atoms represented by R ¹ and R ⁵ include a benzyl group and a phenylethyl group. Examples of the group in which —CH ₂ — contained in the aralkyl group is replaced by —SO ₂ — or —COO— include a 2-phenylacetic acid ethyl group and the like.
Examples of the substituent which the aralkyl group having 7 to 15 carbon atoms represented by R ¹ and R ⁵ may have include the groups described in Group A above.

Examples of the aryl group having 6 to 15 carbon atoms represented by R ¹ and R ⁵ include a phenyl group, a naphthyl group and an anthracenyl group.
Examples of the substituent which the aryl group having 6 to 15 carbon atoms represented by R ¹ and R ⁵ may have include the groups described in Group A above.
Examples of the heterocyclic group having 6 to 15 carbon atoms represented by R ¹ and R ⁵ include carbons such as pyridyl, pyrrolidinyl, quinolyl, thiophene, imidazolyl, oxazolyl, pyrrole, thiazolyl and furanyl And 3 to 9 aromatic heterocyclic groups.

^Examples of the alkyl group having 1 to 6 carbon atoms represented by R ^1A and R ^1B include methyl group, ethyl group, n-propyl group, isopropyl group, n-butyl group, tert-butyl group, sec-butyl group, n -Pentyl group, n-hexyl group and the like.

Examples of the alkyl group having 1 to 6 carbon atoms represented by R ² , R ³ and R ⁴ include the same ones as the alkyl group having 1 to 6 carbon atoms represented by R ^1B .
Examples of the substituent which the alkyl group having 1 to 6 carbon atoms represented by R ² , R ³ and R ⁴ may have include the groups described in the above-mentioned group A.
The aromatic hydrocarbon group represented by R ² , R ³ and R ⁴ includes aryl groups having 6 to 15 carbon atoms such as phenyl, naphthyl and anthracenyl; and 7 to 15 carbon atoms such as benzyl and phenylethyl. There may be mentioned 15 aralkyl groups.
Examples of the substituent which the aromatic hydrocarbon group represented by R ² , R ³ and R ⁴ may have include the groups described in Group A above.
The aromatic heterocyclic ring represented by R ² , R ³ and R ⁴ has 3 carbon atoms such as pyridyl, pyrrolidinyl, quinolyl, thiophene, imidazolyl, oxazolyl, pyrrole, thiazolyl and furanyl. And aromatic heterocyclic groups of -9.
As a substituent which the aromatic heterocyclic ring represented by R < ² >, R < ³ > and R < ⁴ > may have, the group as described in the said group A is mentioned.

Examples of the alkyl group having 1 to 25 carbon atoms represented by R ⁶ and R ⁷ include the same ones as the alkyl group having 1 to 25 carbon atoms represented by R ¹ and R ⁵ .
Examples of the substituent which the alkyl group having 1 to 25 carbon atoms represented by R ⁶ and R ⁷ may have include the groups described in Group A above.

Examples of the electron withdrawing group represented by R ⁶ and R ⁷ include a cyano group, a nitro group, a halogen atom, an alkyl group substituted with a halogen atom, and a group represented by formula (I-1) .

[Wherein, R ¹¹ represents a hydrogen atom or an alkyl group having 1 to 25 carbon atoms, and at least one of the methylene groups contained in the alkyl group may be substituted by an oxygen atom.
X ¹ represents —CO—, —COO—, —OCO—, —NR ¹² CO— or CONR ¹³ —.
R ¹² and R ¹³ each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a phenyl group. ]

The halogen atom includes a fluorine atom, a chlorine atom, a bromine atom and an iodine atom.
Examples of the alkyl group substituted by a halogen atom include trifluoromethyl group, perfluoroethyl group, perfluoropropyl group, perfluoroisopropyl group, perfluorobutyl group, perfluorosec-butyl group, perfluorotert-butyl group, perfluoropentyl group, and the like Perfluoroalkyl groups, such as perfluorohexyl group, etc. are mentioned. The carbon number of the alkyl group substituted with a halogen atom is usually 1 to 25.

Examples of the alkyl group having 1 to 25 carbon atoms represented by R ¹¹ include the same as the alkyl groups represented by R ¹ and R ⁵ .
Examples of the C 1 to C 6 alkyl group represented by R ¹² and R ¹³ include the same as the C ¹ to C 6 alkyl group represented by R ^1A .

R ⁶ and R ⁷ may be linked to each other to form a ring structure, and examples of the ring structure formed of R ⁶ and R ⁷ include a Meldrum's acid structure, a barbituric acid structure, a dimedone structure, etc. Be

The ring structure formed by bonding R ² and R ³ to each other is a nitrogen-containing ring structure containing a nitrogen atom bonded to R ^2, and is, for example, a 4- to 14-membered nitrogen-containing heterocyclic ring It can be mentioned. The ring structure formed by linking R ² and R ³ to each other may be monocyclic or polycyclic. Specifically, pyrrolidine ring, pyrroline ring, imidazolidine ring, imidazoline ring, oxazoline ring, thiazoline ring, piperidine ring, morpholine ring, piperazine ring, indole ring, isoindole ring and the like can be mentioned.

The ring structure formed by bonding R ¹ and R ² to each other is a nitrogen-containing ring structure containing a nitrogen atom to which R ¹ and R ² are bonded, and is, for example, a 4- to 14-membered ring (preferably And 4 to 8 membered rings). The ring structure formed by linking R ¹ and R ² to each other may be monocyclic or polycyclic. Specifically, the same as the ring structure formed by linking R ² and R ³ to each other can be mentioned.

The ring structure formed by combining R ² and R ⁴ with one another includes a 4- to 14-membered nitrogen-containing ring structure, and a 5- to 9-membered nitrogen-containing ring structure is preferable. The ring structure formed by bonding R ² and R ⁴ to each other may be monocyclic or polycyclic. These rings may have a substituent, and as such a ring structure, the same one as exemplified as the ring structure formed by connecting the aforementioned R ² and R ³ to each other can be mentioned.

The ring structure formed by linking R ³ and R ⁶ to each other is a ring structure in which R ³ -C = C-C = C-R ⁶ forms a ring skeleton. For example, a phenyl group etc. are mentioned.

Examples of the compound represented by formula (I) in which R ² and R ³ are linked to each other to form a ring structure include compounds represented by formula (IA), and R ² and R ⁴ Examples of the compound represented by the formula (I) which forms a ring structure by linking include a compound represented by the formula (IB) and the like.

[In formula (IA) and formula (IB), R ¹ , R ³ , R ⁴ , R ⁵ , R ⁶ and R ⁷ each represent the same meaning as described above.
Ring W ¹ and ring W ² each independently represent a nitrogen-containing ring. ]

Ring W ¹ and ring W ² represent a nitrogen-containing ring containing a nitrogen atom as a constituent unit of the ring. The ring W ¹ and the ring W ² may be each independently a single ring or multiple rings, and may contain a heteroatom other than nitrogen as a constituent unit of the ring. The ring W ¹ and the ring W ² are preferably each independently a 5- to 9-membered ring.

The compound represented by the formula (IA) is preferably a compound represented by the formula (IA-1).

[In formula (IA), R ¹ , R ⁴ , R ⁵ , R ⁶ and R ⁷ each represent the same meaning as described above.
A ¹ represents -CH _2- , -O-, -S- or -NR ^1D- .
Each of R ¹⁴ and R ¹⁵ independently represents a hydrogen atom or an alkyl group having 1 to 12 carbon atoms.
R ^1D represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ]

The compound represented by the formula (IB) is preferably a compound represented by the formula (IB-1) and a compound represented by the formula (IB-2).

[In the formula (I-B-1), R ¹ , R ⁶ and R ⁷ each represent the same meaning as described above.
Each R ¹⁶ independently represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or an aryl group. ]

[In the formula (I-B-2), R ³ , R ⁵ , R ⁶ and R ⁷ each represent the same meaning as described above.
R ³⁰ represents a hydrogen atom, a cyano group, a nitro group, a halogen atom, a mercapto group, an amino group, an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an aromatic hydrocarbon having 6 to 18 carbon atoms And an acyl group having 2 to 13 carbon atoms, an acyloxy group having 2 to 13 carbon atoms, or an alkoxycarbonyl group having 2 to 13 carbon atoms.
R ³¹ represents an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, a mercapto group, an alkylthio group having 1 to 12 carbon atoms, an amino group or heterocyclic group which may have a substituent, Represent. ]

The halogen atom represented by R ^30, a fluorine atom, a chlorine atom, a bromine atom, an iodine atom.
The acyl group of 2 to 13 carbon atoms represented by R ³⁰ represented by R ^30, an acetyl group, and the like propionyl group and butyryl group.
Examples of the acyloxy group having 2 to 13 carbon atoms represented by R ³⁰ include a methyl carbonyloxy group, an ethyl carbonyloxy group, a propyl carbonyloxy group, and a butyl carbonyloxy group.
Examples of the alkoxycarbonyl group having 2 to 13 carbon atoms represented by R ³⁰ include a methoxycarbonyl group, an ethoxycarbonyl group, a propoxycarbonyl group, a butoxycarbonyl group and the like.
Examples of the aromatic hydrocarbon group having 6 to 18 carbon atoms represented by R ³⁰ include aryl groups having 6 to 18 carbon atoms such as phenyl group, naphthyl group and biphenyl group; 7 carbon atoms such as benzyl group and phenylethyl group There may be mentioned an aralkyl group of -18.
Examples of the alkyl group having 1 to 12 carbon atoms represented by R ³⁰ include the same ones as the alkyl group having 1 to 12 carbon atoms represented by R ¹⁴ .
Examples of the alkyl group having 1 to 12 carbon atoms represented by R ³⁰ include a methoxy group, an ethoxy group, a propoxy group, a butoxy group and a pentoxy group.
R ³⁰ is preferably an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an amino group or a mercapto group.

Examples of the alkyl group having 1 to 12 carbon atoms represented by R ³¹ include the same ones as the alkyl group having 1 to 12 carbon atoms represented by R ¹⁴ .
Examples of the C 1-12 alkoxy group represented by R ³¹ include the same as the C 1-12 alkoxy group represented by R ³⁰ .
Examples of the alkylthio group having 1 to 12 carbon atoms represented by R ³¹ include a methylthio group, an ethylthio group, a propylthio group, a butylthio group, a pentylthio group and a hexylthio group.
The amino group which may have a substituent represented by R ³¹ is, for example, an amino group; one alkyl group having 1 to 8 carbon atoms such as N-methylamino group or N-ethylamino group Amino groups; amino groups substituted with two alkyl groups having 1 to 8 carbon atoms such as N, N-dimethylamino, N, N-diethylamino, N, N-methylethylamino and the like; and the like.
Examples of the heterocyclic ring represented by R ³¹ include nitrogen-containing heterocyclic groups having 4 to 9 carbon atoms such as pyrrolidinyl group, piperidinyl group and morpholinyl group.

As a compound represented by the formula (I) in which R ³ and R ⁶ are linked to each other to form a ring structure, and R ² and R ⁴ are linked to each other to form a ring structure, a compound represented by formula (IC) And the like.

[In formula (I-C), R ^1, R ⁶ and R ⁷ represent the same meaning as described above.
Each of R ²¹ and R ²² independently represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or a hydroxy group.
Each of X ² and X ³ independently represents —CH ₂ — or —N (R ²⁵ ) =.
R ²⁵ represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms, or an aromatic hydrocarbon group which may have a substituent. ]

Examples of the alkyl group having 1 to 25 carbon atoms represented by R ²⁵ include the same ones as the alkyl group having 1 to 25 carbon atoms represented by R ¹ .
Examples of the aromatic hydrocarbon group represented by R ²⁵ include aryl groups such as phenyl group and naphthyl group: aralkyl groups such as benzyl group and phenylethyl group: biphenyl group and the like, and aromatics having 6 to 20 carbon atoms It is preferably a hydrocarbon group. Examples of the substituent which the aromatic hydrocarbon group represented by R ²⁵ may have include a hydroxy group and the like.

Preferably, R ³ and R ⁶ are each independently an electron withdrawing group.

Examples of the compound represented by the formula (I) in which R ¹ and R ² are linked to each other to form a ring structure and R ³ and R ⁶ are linked to each other to form a ring structure include a compound represented by formula (ID) And the like.

[In the formula (I-D), R ⁴ , R ⁵ and R ⁷ represent the same meaning as described above.
R ²⁵ , R ²⁶ , R ²⁷ and R ²⁸ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms which may have a substituent, a hydroxy group or an aralkyl group. ]

Examples of the alkyl group having 1 to 12 carbon atoms represented by R ²⁵ , R ²⁶ , R ²⁷ and R ²⁸ include the same ones as the alkyl group having 1 to 12 carbon atoms represented by R ^1A and R ^1B . Examples of the substituent which the alkyl group having 1 to 12 carbon atoms represented by R ²⁵ , R ²⁶ , R ²⁷ and R ²⁸ may have include a hydroxy group.
Examples of the aralkyl group represented by R ²⁵ , R ²⁶ , R ²⁷ and R ²⁸ include aralkyl groups having 7 to 15 carbon atoms such as benzyl group and phenylethyl group.

Examples of the compound (I) in which R ⁶ and R ⁷ are linked to each other to form a ring structure include compounds represented by the formula (IE) and the like.

[In the formula (I-C), R ¹ , R ³ , R ⁴ and R ⁵ each represent the same meaning as described above.
Ring W ³ represents a cyclic compound. ]
The ring W ³ is a 5- to 9-membered ring, and may contain a heteroatom such as a nitrogen atom, an oxygen atom or a sulfur atom as a constituent unit of the ring.

The compound represented by the formula (IE) is preferably a compound represented by the formula (IE-1).

[In the formula (I-E-1), R ¹ , R ² , R ³ and R ⁵ each represent the same meaning as described above.
R ¹⁷ , R ¹⁸ , R ¹⁹ and R ^q each independently represent a hydrogen atom or an alkyl, aralkyl or aryl group having 1 to 12 carbon atoms which may have a substituent, and the alkyl or The -CH ₂ -group contained in the aralkyl group may be substituted by -NR ^2D- , -C (= O)-, -C (= S)-, -O-, -S-, R ¹⁷ and R ¹⁸ may be linked to each other to form a ring structure, R ¹⁸ and R ¹⁹ may be linked to each other to form a ring structure, and R ¹⁹ and R ^q are linked to each other to form a ring structure You may R ^2D represents a hydrogen atom, or an alkyl, aralkyl or aryl group having 1 to 12 carbon atoms which may have a substituent, and the —CH ₂ — group contained in the alkyl or aralkyl group is —C OO) —, —C (= S) —, —O— or —S— may be substituted.
m, p and q each independently represent an integer of 1 to 3. ]

Examples of the compound represented by the formula (I) include the following compounds.

The content of the photoselective absorption compound (B) is usually 0.01 to 20 parts by mass, preferably 0.05 to 15 parts by mass, relative to 100 parts by mass of the photocurable component (A). The amount is preferably 0.1 to 10 parts by mass, and more preferably 0.1 to 5 parts by mass.

<Photoinitiator (C)>
[Radically polymerizable initiator]
When the photocurable component (A) is a radical polymerization compound, the photopolymerization initiator (C) contains a photoradical polymerization initiator. Furthermore, a thermal radical polymerization initiator may be contained. The photo radical polymerization initiator is to initiate the polymerization reaction of the radical curable compound by irradiation of an active energy ray such as visible light, ultraviolet light, X-ray or electron beam. The active energy ray-curable adhesive composition can contain one or more radical polymerization initiators.

As the photo radical polymerization initiator and the thermal radical polymerization initiator, conventionally known ones can be used. As a radical photopolymerization initiator, acetophenone, 3-methylacetophenone, benzyl dimethyl ketal, 1- (4-isopropylphenyl) -2-hydroxy-2-methylpropan-1-one, 2-methyl-1- [4- (4) Acetophenone-based initiators such as (methylthio) phenyl-2-morpholinopropan-1-one, 2-hydroxy-2-methyl-1-phenylpropan-1-one; benzophenone, 4-chlorobenzophenone, 4,4'-diamino Benzophenone-based initiators such as benzophenone; Benzoin-ether-based initiators such as benzoin propyl ether, benzoimme, and chill ether benzoin ethyl ether; Thioxanthone-based initiators such as 4-isopropyl thioxanthone; Dehydrogenase, anthraquinone, and the like.

The content of the radical polymerization initiator is usually 0.5 to 20 parts by mass, preferably 1 to 6 parts by mass with respect to 100 parts by mass of the radical polymerizable compound. By containing 0.5 parts by weight or more of the radical polymerization initiator, the radically polymerizable compound can be sufficiently cured.

(Cationically polymerizable initiator)
When the photocurable component (A) is a cationically polymerizable compound, the photopolymerization initiator (C) is a photocationic polymerization initiator. The cationic photopolymerization initiator generates a cationic species or a Lewis acid by irradiation of an active energy ray such as visible light, ultraviolet light, X-ray or electron beam to initiate a polymerization reaction of the cationic curable compound. . Since the photocationic polymerization initiator acts catalytically with light, it is excellent in storage stability and workability even when it is mixed with the photocationic curable compound. Examples of the compound that generates a cationic species or a Lewis acid upon irradiation with active energy rays include onium salts such as aromatic iodonium salts and aromatic sulfonium salts; aromatic diazonium salts; iron-arene complexes and the like.

The aromatic iodonium salt is a compound having a diaryliodonium cation, and the cation can typically include a diphenyl iodonium cation. The aromatic sulfonium salt is a compound having a triarylsulfonium cation, and as the cation, typically, triphenylsulfonium cation, 4,4'-bis (diphenylsulfonio) diphenyl sulfide cation and the like can be mentioned. The aromatic diazonium salt is a compound having a diazonium cation, and typically, a benzene diazonium cation can be mentioned as the cation. Also, the iron-arene complex is typically cyclopentadienyl iron (II) arene cation complex salt.

The cations shown above are paired with anions (anions) to make up a photocationic initiator. Examples of anions constituting the photocationic polymerization initiator include: special phosphorus anion [(Rf) _n PF _6-n ] ⁻ , hexafluorophosphate anion PF ₆ ⁻ , hexafluoroantimonate anion SbF ₆ ⁻ , pentafluoro There are hydroxyantimonate anion SbF ₅ (OH) ⁻ , hexafluoroarsenate anion AsF ₆ ⁻ , tetrafluoroborate anion BF ₄ ⁻ , tetrakis (pentafluorophenyl) borate anion B (C ₆ F ₅ ) ₄ ^{− and the} like. Among them, from the viewpoint of safety of the curability and the resulting light selective absorption layer of the cationically polymerizable compound, a special phosphate based anionic _{[(Rf) n PF 6-} n] -, hexafluorophosphate anion PF ₆ ^- to be preferable.

The photocationic polymerization initiator may be used alone or in combination of two or more. Among them, the aromatic sulfonium salt is preferably used because it has an ultraviolet absorbing property even in the wavelength region around 300 nm and is excellent in curability and can give a cured product having good mechanical strength and adhesive strength.

The content of the photo cationic polymerization initiator is usually 0.5 to 10 parts by mass, preferably 6 parts by mass or less, with respect to 100 parts by mass of the cationically polymerizable compound. The cationically polymerizable compound can be sufficiently cured by blending the cationic photopolymerization initiator in an amount of 0.5 parts by mass or more.

(Optional ingredient)
The active energy ray-curable composition can optionally contain an additive. As an additive, an ion trap agent, a chain transfer agent, a polymerization accelerator, a sensitizer, a sensitizer, a light stabilizer, a tackifier, a filler, a flow control agent, a plasticizer, an antifoamer, a leveling agent , Silane coupling agent, translucent fine particles, solvents such as organic solvents, thermal polymerization initiator, blocking agent, antifouling agent, surfactant, crosslinking agent, curing agent, viscosity modifier, antistatic agent, antifouling agent Slip agents, refractive index modifiers, dispersants and the like.

When using an active energy ray curable composition for formation of surface treatment layers, such as a hard-coat layer, it is preferable that an organic solvent is included. Organic solvents include aliphatic hydrocarbons such as hexane, cyclohexane and octane; aromatic hydrocarbons such as toluene and xylene; methanol, ethanol, 1-propanol, isopropanol, n-butanol, s-butanol and t-butanol Alcohols such as benzyl alcohol, PGME, ethylene glycol and cyclohexanol; Ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, cyclohexanone, heptanone, diisobutyl ketone and diethyl ketone; Ethyl acetate, butyl acetate, isobutyl acetate and the like Esters; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene Glycol ethers such as glycol monoethyl ether; Esterified glycol ethers such as ethylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate; Cellsolves such as 2-methoxyethanol, 2-ethoxyethanol, 2-butoxyethanol; 2- Carbitols such as (2-methoxyethoxy) ethanol, 2- (2-ethoxyethoxy) ethanol and 2- (2-butoxyethoxy) ethanol; aliphatic hydrocarbons such as hexane and cyclohexane; methylene chloride, chloroform, Halogenated hydrocarbons such as carbon chloride; Aromatic hydrocarbons such as benzene, toluene and xylene; Amides such as dimethylformamide, dimethylacetamide and n-methylpyrrolidone; Diethyl 1-methoxy-2-ether alcohols propanol,; ether, dioxane, tetrahydrofuran and the like water and the like. The organic solvent can be selected and used in consideration of viscosity and the like. By including the organic solvent in the active energy ray curable composition, the coatability to the resin film is improved.

These organic solvents may be used alone or, if necessary, may be used as a mixture of several kinds. When the active energy ray curable composition contains an organic solvent, it is necessary to evaporate the organic solvent after coating. Therefore, it is desirable that the organic solvent have a boiling point in the range of 60.degree. C. to 160.degree. The saturated vapor pressure at 20 ° C. is preferably in the range of 0.1 kPa to 20 kPa.

As a leveling agent, well-known things, such as a fluorine-type leveling agent, a silicone type leveling agent, an acryl-type leveling agent, can be mentioned, for example. The content of the leveling agent is preferably 0.1 to 1 part by mass with respect to 100 parts by mass of the photocurable component (A). If the light selective absorption layer is a surface treatment layer, the flatness of the surface may be deteriorated, haze and unevenness may easily occur, and the blocking resistance may not be sufficiently exhibited. On the other hand, when it is more than 1 part by mass, the dispersibility and the pot life of the active energy ray-curable composition tend to be deteriorated.

The active energy ray curable composition may have an adhesive function depending on the type of the photocurable component (A) and the like, and can be used as an adhesive. When the active energy ray-curable composition is used as an adhesive, its viscosity is preferably low. Specifically, the viscosity at 25 ° C. is preferably 1000 mPa · s or less, more preferably 500 mPa · s or less, still more preferably 300 mPa · s or less, and usually 250 mPa · s or more. The curable adhesive composition according to the present invention may be of a non-solvent type, but may contain an organic solvent in order to adjust the viscosity to a suitable value for the applied coating method.

<Resin film (a)>
The resin film (a) may be a film having an optical function, such as a polarizing film, a retardation film, or a wind film. The film having an optical function means a film capable of transmitting, reflecting and absorbing light.

A window film means a front plate in a flexible display such as a flexible display, and is generally disposed on the outermost surface of the display. The window film is, for example, a resin film made of a polyimide resin. The window film may be a hybrid film of an organic material and an inorganic material such as a resin film containing, for example, polyimide and silica. In addition, a hard coat layer may be disposed on the surface of the window film to impart surface hardness, stain resistance, and fingerprint resistance. As a window film, the film of Unexamined-Japanese-Patent No. 2017-94488, etc. are mentioned.

[Retardation film]
The retardation film is an optical film showing optical anisotropy, and for example, polyvinyl alcohol, polycarbonate, polyester, polyarylate, polyimide, polyolefin, polycycloolefin, polystyrene, polysulfone, polyether sulfone, polyvinylidene fluoro, An example is a stretched film obtained by stretching a polymer film composed of a ride / polymethyl methacrylate, acetyl cellulose, a saponified ethylene-vinyl acetate copolymer, polyvinyl chloride and the like by about 1.01 to 6 times. Among them, a polymer film obtained by uniaxially or biaxially stretching a polycarbonate film or a cycloolefin resin film is preferable. The retardation film may be a retardation film obtained by curing a polymerizable liquid crystal compound. In the present specification, the retardation film includes a zero retardation film, and also includes a film referred to as a uniaxial retardation film, a low photoelastic modulus retardation film, a wide viewing angle retardation film, or the like.

A film referred to as a temperature compensation type retardation film, a film referred to as a temperature-compensated retardation film, a film in which optical anisotropy is expressed by application and orientation of a liquid crystal compound, and a film in which optical anisotropy is expressed by application of an inorganic layered compound. “NH film (trade name; film in which rod-like liquid crystals are inclined and oriented)” sold by Liquid Crystal Film Co., Ltd., etc., “WV film (trade name: disk-like liquid crystal with slant orientation) sold by Fujifilm Co., Ltd. ], "VAC film (trade name; film of fully biaxial orientation type)" sold by Sumitomo Chemical Co., Ltd., "new VAC film (trade name: film of biaxial orientation type)" and the like.

The zero retardation film is an optically isotropic film in which both the front retardation R _e and the retardation R _{th in the} thickness direction are -15 to 15 nm. As a zero retardation film, resin films made of cellulose resins, polyolefin resins (chain polyolefin resins, polycycloolefin resins, etc.) or polyethylene terephthalate resins can be mentioned. Cellulose-based resins or polyolefin-based resins are preferred in that they are easy. The zero retardation film can also be used as a protective film. As the zero retardation film, “Z-TAC” (trade name) sold by Fuji Film Co., Ltd., “Zero Tack (registered trademark)” sold by Konica Minolta Opto Co., Ltd., Nippon Zeon Co., Ltd. And “ZF-14” (trade name) sold by

In the optical film of the present invention, the retardation film is preferably a retardation film obtained by curing a polymerizable liquid crystal compound.

As a film in which optical anisotropy is expressed by application and orientation of a liquid crystal compound,
First embodiment: a retardation film in which a rod-like liquid crystal compound is oriented horizontally to a supporting substrate,
Second embodiment: a retardation film in which a rod-like liquid crystal compound is oriented in a direction perpendicular to a supporting substrate,
Third embodiment: a retardation film in which a rod-like liquid crystal compound has a helical orientation in the plane, and a fourth embodiment: a retardation film in which a discotic liquid crystal compound is obliquely aligned,
Fifth embodiment: A biaxial retardation film in which a discotic liquid crystal compound is oriented in a direction perpendicular to a support substrate can be mentioned.

For example, as an optical film used for an organic electroluminescent display, the 1st form, the 2nd form, and the 5th form are used suitably. Or these may be laminated and used.

When the retardation film is a layer composed of a polymer in the alignment state of the polymerizable liquid crystal compound (hereinafter sometimes referred to as "optically anisotropic layer"), the retardation film has reverse wavelength dispersion. preferable. Reverse wavelength dispersion is an optical characteristic in which the in-plane retardation value at the short wavelength is smaller than the in-plane retardation value at the long wavelength, and preferably the retardation film has the following formula It is to satisfy (7) and equation (8). Re (λ) represents an in-plane retardation value for light of wavelength λ nm.
Re (450) / Re (550) ≦ 1 (7)
1 ≦ Re (630) / Re (550) (8)
In the optical film of the present invention, when the retardation film is in the first form and has reverse wavelength dispersion, it is preferable because the coloration at the time of black display in the display device is reduced, and 0.82 ≦ in the formula (7). It is more preferable if Re (450) / Re (550) ≦ 0.93. Furthermore, 120 ≦ Re (550) ≦ 150 is preferable.

As a polymerizable liquid crystal compound when the retardation film is a film having an optically anisotropic layer, “3” of “Liquid Crystal Handbook” (edited by the LCD Handbook Editorial Board, Maruzen Co., Ltd., published on October 30, 2000). Of the compounds described in “8.6 Network (fully cross-linked type)”, “6.5.1 liquid crystal material b. Polymerizable nematic liquid crystal material”, compounds having a polymerizable group, and JP-A-2010-31223 Publication No. 2010-270108 Publication No. 2011-6360 Publication No. 2011-207765 Publication No. 2011-162678 Publication No. 2016-81035 Publication International Publication No. 2017/043438 And polymerizable liquid crystal compounds described in JP-A-2011-207765.

Examples of the method for producing a retardation film from a polymer in the alignment state of the polymerizable liquid crystal compound include the method described in JP-A-2010-31223.

In the case of the second embodiment, the front retardation value Re (550) may be adjusted in the range of 0 to 10 nm, preferably in the range of 0 to 5 nm, and the retardation value R _{th in the} thickness direction is -10 to- It may be adjusted in the range of 300 nm, preferably in the range of -20 to -200 nm. The retardation value R _th in the thickness direction, which means the refractive index anisotropy in the thickness direction, is an in-plane retardation difference from the retardation value R ₅₀ measured by tilting 50 degrees with the in-plane fast axis as the tilt axis. It can be calculated from the value R ₀ . That is, the phase difference value R _th in the thickness direction retardation value R ₀ in the plane retardation value R ₅₀ measured by inclining 50 degrees inclination axis fast axis, thickness of the retardation film d, and positions the average refractive index n ₀ of the retardation film, obtains the n _x, n _y and n _z by the following equation (10) to (12), these are substituted into equation (9) can be calculated.

R _th = [(n _x + n _y ) / 2-n _z ] × d (9)
R ₀ = (n _x -n _y ) × d (10)
R ₅₀ = (n _x -n _y ') × d / cos (φ) (11)
(n _x + n _y + n _z ) / 3 = n ₀ (12)
here,
φ = sin ⁻¹ (sin (40 °) / n ₀ )
n _y '= n _y × n _z / [ _ny ² × sin ² (φ) + n _z ² × cos ² (φ)] ^1/2

The retardation film may be a multilayer film having two or more layers. For example, the thing by which the protective film was laminated | stacked on the single side | surface or both surfaces of retardation film, and the thing by which two or more retardation films were laminated | stacked via the adhesive or the adhesive agent are mentioned.

When the optical film 40 is a multilayer film in which two or more retardation films are laminated, as a configuration of an optical laminate including the optical film of the present invention, as shown in FIG. A quarter-wave retardation layer 50 for giving a retardation of a minute and a half-wave retardation layer 70 for giving a retardation of a 1⁄2 wavelength to transmitted light through an adhesive or a pressure-sensitive adhesive 60 A configuration including the laminated optical film 40 can be mentioned. Moreover, as shown in FIG. 5, the structure containing the optical film 40 which laminated | stacked the quarter wavelength phase difference layer 50a and the positive C layer 80 through the adhesive bond layer or the adhesive layer is also mentioned.

The first wavelength retardation layer 50 for giving a phase difference of 1⁄4 wavelength shown in FIG. 4 and the half wavelength retardation layer 70 for giving a phase difference of 1⁄2 wavelength to transmitted light The optical film of the fifth aspect may be used. In the case of the configuration of FIG. 4, it is more preferable that at least one is the fifth form.

In the case of the configuration of FIG. 5, the 1⁄4 wavelength retardation layer 50 a is preferably the optical film of the first embodiment, and more preferably satisfies the expressions (7) and (8).

[Polarizing film]
The polarizing film is a film having a function of selectively transmitting one-way linear polarized light from natural light. For example, an iodine-based polarizing film in which iodine as a dichroic dye is adsorbed and oriented in a polyvinyl alcohol-based resin film, and a dye-based film in which a dichroic dye as a dichroic dye is adsorbed and oriented in a polyvinyl alcohol-based resin film Examples of the polarizing film include a polarizing film, and a coating-type polarizing film which is coated with a dichroic dye in a lyotropic liquid crystal state, and is oriented and fixed. These polarizing films are referred to as absorptive polarizing films because they selectively transmit one linearly polarized light in one direction from natural light and absorb linearly polarized light in the other. The polarizing film is not limited to the absorptive polarizing film, and is a reflective polarizing film that selectively transmits one linearly polarized light from natural light and reflects the linearly polarized light in the other, or linearly polarized light in the other. It may be a scattering type polarizing film that scatters, but an absorbing type polarizing film is preferable in terms of excellent visibility. Among them, a polyvinyl alcohol-based polarizing film composed of a polyvinyl alcohol-based resin is more preferable, and a polyvinyl alcohol-based polarizing film in which a dichroic dye such as iodine or a dichroic dye is adsorbed and oriented on the polyvinyl alcohol-based resin film is further preferable. Preferably, a polyvinyl alcohol-based polarizing film in which iodine is adsorbed and oriented to a polyvinyl alcohol-based resin film is particularly preferable.

As polyvinyl alcohol-type resin which comprises a polyvinyl alcohol-type polarizing film, what saponified polyvinyl acetate type resin can be used. 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. Examples of other monomers copolymerizable with vinyl acetate include unsaturated carboxylic acids, olefins, vinyl ethers, unsaturated sulfonic acids, (meth) acrylamides having an ammonium group, and the like.

The degree of saponification of the polyvinyl alcohol resin is usually about 85 to 100 mol%, preferably 98 mol% or more. The polyvinyl alcohol-based resin may be modified, and for example, polyvinyl formal or polyvinyl acetal modified with aldehydes can also be used. The average degree of polymerization of the polyvinyl alcohol resin is usually about 1000 to 10000, preferably about 1500 to 5000. The average degree of polymerization of the polyvinyl alcohol-based resin can be determined in accordance with JIS K 6726.

What formed such a polyvinyl alcohol-type resin into a film is used as a raw film of a polarizing film. The method of forming a polyvinyl alcohol-based resin into a film is not particularly limited, and a known method is adopted. The thickness of the polyvinyl alcohol-based raw film is, for example, 150 μm or less, and preferably 100 μm or less (eg, 50 μm or less).

The polarizing film is a step of uniaxially stretching a polyvinyl alcohol-based resin film; a step of adsorbing a dichroic dye by dyeing a polyvinyl alcohol-based resin film with a dichroic dye; a polyvinyl alcohol-based dye having a dichroic dye adsorbed thereon The resin film can be manufactured by a method including a step of treating (crosslinking treatment) with a boric acid aqueous solution; and a step of washing with water after treatment with a boric acid aqueous solution.

The uniaxial stretching of the polyvinyl alcohol-based resin film can be performed before, simultaneously with, or after the dyeing of the dichroic dye. If uniaxial stretching is performed after dyeing, this uniaxial stretching may be performed before or during the boric acid treatment. Moreover, you may uniaxially stretch in these several 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. The uniaxial stretching may be dry stretching in which stretching is performed in the air, or wet stretching in which stretching is performed in a state in which a polyvinyl alcohol resin film is swollen using a solvent or water. The stretching ratio is usually about 3 to 8 times.

As a method of dyeing a polyvinyl alcohol-based resin film with a dichroic dye, for example, a method of immersing the film in an aqueous solution containing a dichroic dye is employed. As the dichroic dye, iodine or a dichroic organic dye is used. The polyvinyl alcohol-based resin film is preferably subjected to immersion treatment in water prior to the dyeing treatment.

As a dyeing | staining process by iodine, the method of immersing a polyvinyl-alcohol-type resin film in the aqueous solution containing an iodine and potassium iodide is employ | adopted normally. The content of iodine in this aqueous solution can be about 0.01 to 1 part by weight per 100 parts by weight of water. The content of potassium iodide can be about 0.5 to 20 parts by weight per 100 parts by weight of water. In addition, the temperature of this aqueous solution can be about 20 to 40.degree. On the other hand, as a dyeing | staining process by a dichroic organic dye, the method of immersing a polyvinyl alcohol-type resin film in the aqueous solution containing a dichroic organic dye is employ | adopted normally. The aqueous solution containing the dichroic organic dye may contain an inorganic salt such as sodium sulfate as a dyeing assistant. The content of the dichroic organic dye in this aqueous solution can be about 1 × 10 ⁻⁴ to 10 parts by weight per 100 parts by weight of water. The temperature of this aqueous solution can be about 20 to 80.degree.

As a boric acid process after dyeing | staining with a dichroic dye, the method of immersing the dyed polyvinyl alcohol-type resin film in boric-acid containing aqueous solution is employ | adopted normally. When using iodine as a dichroic dye, it is preferable that this boric-acid containing aqueous solution contains potassium iodide. The amount of boric acid in the boric acid-containing aqueous solution can be about 2 to 15 parts by weight per 100 parts by weight of water. The amount of potassium iodide in the aqueous solution can be about 0.1 to 20 parts by weight per 100 parts by weight of water. The temperature of the aqueous solution can be 50 ° C. or higher, for example, 50 to 85 ° C.

The polyvinyl alcohol resin film after boric acid treatment is usually washed with water. The water washing process can be performed, for example, by immersing a boric acid-treated polyvinyl alcohol resin film in water. The temperature of water in the water washing treatment is usually about 5 to 40.degree. After washing with water, the film is dried to obtain a polarizing film 30. The drying process can be performed using a hot air dryer or a far infrared heater. A polarizing plate can be obtained by bonding a thermoplastic resin film as a protective film or the like on one side or both sides of this polarizing film using a curable adhesive composition or the like.

Further, as another example of the method for producing a polarizing film, for example, methods described in JP-A-2000-338329 and JP-A-2012-159778 can be mentioned.

The thickness of the polarizing film can be 40 μm or less, preferably 30 μm or less (eg, 20 μm or less, further 15 μm or less, or even 10 μm or less). According to the methods described in JP-A-2000-338329 and JP-A-2012-159778, the thin film polarizing film 30 can be manufactured more easily, and the thickness of the polarizing film 30 is, for example, 20 μm or less, and further, Of 15 μm or less, or even 10 μm or less. The thickness of the polarizing film 30 is usually 2 μm or more. Reducing the thickness of the polarizing film is advantageous for reducing the thickness of the polarizing plate and thus the image display device.

A preferable configuration of the polarizing plate is a polarizing plate in which a protective film is laminated on at least one surface of a polarizing film via an adhesive layer. When the protective film is laminated on only one side of the polarizing film, it is more preferable to be laminated on the viewing side (opposite side to the panel). It is preferable that the protective film laminated | stacked on the visual recognition side is a protective film which consists of triacetyl-cellulose-type resin or cycloolefin type resin. The protective film may be an unstretched film, or may be stretched in any direction and have a retardation. A surface treatment layer such as a hard coat layer or an antiglare layer may be provided on the surface of the protective film laminated on the viewing side. The surface treatment layer may be the light selective absorption layer in the present invention.
When the protective film is laminated on both sides of the polarizing film, the protective film on the panel side (the opposite side to the visible side) is a protective film or a retardation film made of a triacetyl cellulose resin, a cycloolefin resin or an acrylic resin. Is preferred. The retardation film may be a zero retardation film described later.
Another layer or film may be further laminated between the polarizing plate and the panel. When used as a circularly polarizing plate for an organic EL display, a retardation layer having a 1⁄4 wavelength retardation layer and a 1⁄2 wavelength retardation layer, and a 1⁄4 wavelength layer of reverse wavelength dispersion described later are laminated. Is preferred. The retardation layer is preferably a liquid crystal retardation film from the viewpoint of thinning.

<Method of producing light selective absorption layer>
An active energy ray-curable composition is applied on the above-mentioned resin film (a) to form a coating film, dried if necessary, and then the above-mentioned coating film is cured to form a light selective absorption layer. The optical film of the present invention can be manufactured. The active energy ray curable composition may have an adhesive function depending on its component.

As a method of applying an active energy ray curable composition to form a coating film, for example, a spin coating method, a dip method, a spray method, a die coating method, a bar coating method, a roll coater method, a meniscus coater method, a flexo printing method And various known methods such as screen printing method and bead coater method.

The drying method is not particularly limited, but in general, the drying temperature may be 30 to 80 ° C., and the drying time may be 3 to 120 seconds. When the said drying temperature is less than 30 degreeC, manufacture of a surface treatment film takes a long time, and manufacturing cost may become high. On the other hand, if the drying temperature exceeds 80 ° C., there is a problem that the manufacturing cost of the surface treatment film becomes high, and there is a possibility that the initiator, the solvent and the like adhere to the inside of the drying furnace and the like to deteriorate the appearance. If the drying time is less than 3 seconds, the adhesion between the substrate film and the surface treatment layer may be poor, or interference fringes may occur. On the other hand, when the drying time exceeds 120 seconds, it takes a long time to dry the coating, which may increase the manufacturing cost.

The active energy ray irradiation intensity is determined for each curable composition, but the light irradiation intensity in the wavelength range effective for activating the photopolymerization initiator should be 0.1 to 1000 mW / cm ² preferable. When the light irradiation intensity is too low, the reaction time becomes too long, while when the light irradiation intensity is too high, yellowing of the cured layer occurs due to heat radiated from the lamp and heat generation during polymerization of the curable composition. It may cause deterioration of the polarizing film or skin defects of the protective film. Further, the light irradiation time to the curable composition is also controlled for each curable composition, but the integrated light quantity represented as the product of the light irradiation intensity and the light irradiation time is 10 to 5000 mJ / cm ^2. It is preferable to set. If the accumulated light amount is too small, generation of the active species derived from the photopolymerization initiator may not be sufficient, and curing of the obtained cured layer may be insufficient. On the other hand, if the accumulated light amount is too large, light irradiation may occur. The time is very long and it is likely to be disadvantageous to the improvement of productivity.

(Display device)
The optical film of the present invention can be laminated on a display element such as an organic EL element or a liquid crystal cell, and can be used for a display (FPD: flat panel display) such as an organic EL display or a liquid crystal display.

EXAMPLES The present invention will be more specifically described below by showing Examples and Comparative Examples, but the present invention is not limited by these examples. In the examples,% and parts representing contents or amounts used are on a weight basis unless otherwise noted.

<Synthesis of Photoselective Absorbent Compound>
Synthesis Example 1 Synthesis of Photoselective Absorbent Compound (1)

The inside of a 200 mL four-necked flask equipped with a Dimroth condenser and a thermometer is a nitrogen atmosphere, and 10 g of a compound represented by the formula (aa) synthesized with reference to patent document (Japanese Patent Laid-Open No. 2014-194508) 3.6 g of Kojun Pharmaceutical Co., Ltd., 6.9 g of 2-ethylhexyl cyanoacetate (manufactured by Tokyo Chemical Industry Co., Ltd.), and 60 g of acetonitrile (Wako Pure Chemical Industries, Ltd.) were charged, and stirred with a magnetic stirrer. At an internal temperature of 25 ° C., 4.5 g of DIPEA (manufactured by Tokyo Kasei Kogyo Co., Ltd.) was dropped from the dropping funnel over 1 hour, and after completion of dropping, the temperature was kept at 25 ° C. for further 2 hours. After completion of the reaction, acetonitrile is removed using a vacuum evaporator, purified by column chromatography (silica gel) and purified, and the effluent containing the photoselective absorptive compound represented by the formula (aa1) is purified using a vacuum evaporator The solvent was removed to give yellow crystals. The crystals were dried at 60 ° C. under reduced pressure to obtain 4.6 g of a photoselective absorptive compound (1) represented by the formula (aa1) as a yellow powder. The yield was 50%.

^{When 1} H-NMR analysis was performed, the following peaks were observed, and thus, it was confirmed that the light selective absorption compound 1 was generated.
¹ H-NMR (CDCl 3) δ: 0.87 to 0.94 (m, 6H), 1.32-1.67 (m, 8H), 1.59- 1.66 (m, 2H), 09 (quin, 2 H), 3.00 (m, 5 H), 3.64 (t, 2 H), 4. 10 (dd, 2 H), 5.52 (d, 2 H), 7.87 (d, 2 H) )

<Gram absorption coefficient ε measurement>
In order to measure the gram absorption coefficient of the obtained photoselective absorptive compound (1), the photoselective absorptive compound (1) was dissolved in 2-butanone. The resulting solution (concentration: 0.006 g · L ^-1 ) is placed in a 1 cm quartz cell, and the quartz cell is set in a spectrophotometer UV-2450 (manufactured by Shimadzu Corporation), and 1 nm steps 300 to 200 by double beam method. Absorbance was measured in the wavelength range of 800 nm. From the obtained absorbance value, the concentration of the light absorbing compound in the solution, and the optical path length of the quartz cell, the gram absorption coefficient for each wavelength was calculated using the following equation.
ε (λ) = A (λ) / CL
[Wherein, ε (λ) represents the gram absorption coefficient L / (g · cm) of the compound at the wavelength λ nm, A (λ) represents the absorbance at the wavelength λ nm, C represents the concentration g / L, and L is It represents the optical path length cm of the quartz cell. ]
When the absorption maximum wavelength (λmax) of the photoselective absorption compound (1) is measured, λmax = 389 nm (in 2-butanone), the value of ε (405) is 47 L / (g · cm), and ε The value of (440) was 0.1 L / (g · cm) or less, and the value of ε (405) / ε (440) was 80 or more.

Synthesis Example 2 Synthesis of Photoselective Absorbent Compound (2)

10 g of a compound represented by the formula (aa) prepared by referring to JP-A-2014-194508 in a nitrogen atmosphere in a 200 mL four-necked flask provided with a Dimroth condenser and a thermometer, acetic anhydride (Wako Pure Chemical Industries, Ltd. 3.6 g of the product, Inc., 10 g of 2-butyloctyl cyanoacetate (manufactured by Tokyo Chemical Industry Co., Ltd.), and 60 g of acetonitrile (manufactured by Wako Pure Chemical Industries, Ltd.) were charged, and stirred with a magnetic stirrer. After 4.5 g of DIPEA (manufactured by Tokyo Chemical Industry Co., Ltd.) was added dropwise to the obtained mixture over 1 hour at an internal temperature of 25 ° C., the mixture was kept at an internal temperature of 25 ° C. for 2 hours. Thereafter, acetonitrile is removed using a vacuum evaporator and purified by column chromatography (silica gel), and the effluent containing the compound represented by the formula (aa2) is solvent-removed using a vacuum evaporator, yellow I got a crystal. The crystals were dried at 60 ° C. under reduced pressure to obtain 4.6 g of a compound represented by the formula (aa2) (a light selective absorption compound (2)) as a yellow powder. The yield was 56%.
When the gram absorbance coefficient is determined by the same method as described above, the value of ε (405) of the compound represented by formula (aa2) is 45 L / (g · cm), and the value of ε (420) is 2.1 L / (G · cm).

<Preparation of Active Energy Ray-Curable Resin Composition>
Preparation Example 1 Preparation of Active Energy Ray-Curable Resin Composition A1 The components were mixed in the following proportions to prepare active energy ray-curable resin composition A1.
N-hydroxy ethyl acrylamide 80 parts pentaerythritol triacrylate 12 parts multifunctional urethane acrylate 8 parts (reaction product of hexamethylene diisocyanate and pentaerythritol triacrylate)
Irgacure 500 (obtained from BASF Corp.) 3 parts 1 part of the photoselective absorptive compound (1) obtained in Synthesis Example 1

Preparation Example 2 Preparation of Active Energy Ray-Curable Resin Composition A2 The components were mixed in the following proportions to prepare active energy ray-curable resin composition A1.
N-hydroxy ethyl acrylamide 80 parts pentaerythritol triacrylate 12 parts multifunctional urethane acrylate 8 parts (reaction product of hexamethylene diisocyanate and pentaerythritol triacrylate)
Irgacure 500 (obtained from BASF Corp.) 3 parts 1 part of the photoselective absorptive compound (2) obtained in Synthesis Example 2

Preparation Example 3 Preparation of Active Energy Ray-Curable Resin Composition B The components were mixed in the following proportions to prepare active energy ray-curable resin composition B.
N-hydroxy ethyl acrylamide 80 parts pentaerythritol triacrylate 12 parts multifunctional urethane acrylate 8 parts (reaction product of hexamethylene diisocyanate and pentaerythritol triacrylate)
Irgacure 500 (obtained from BASF Corp.) 3 parts

Example 1 Preparation of Optical Film A1 A resin film made of a cyclic polyolefin resin having a thickness of 23 μm [trade name “ZEONOR”, manufactured by Nippon Zeon Co., Ltd .; hereinafter, it may be referred to as a COP resin film. Two sheets of] were prepared. The surface of the COP resin film is subjected to a corona discharge treatment, and the surface treated with the corona discharge is coated with an active energy ray curable resin composition A1 using a bar coater so that the film thickness after curing becomes about 5.0 μm. did. Another surface of the COP resin film is also subjected to corona discharge treatment, and the surface coated with the active energy ray curable resin composition A is bonded to the surface treated with the corona discharge, and an ultraviolet irradiation device with a belt conveyor [ The lamp was irradiated with ultraviolet light so that the illuminance was 250 mW / cm ² and the integrated light quantity was 250 mJ / cm ² (UVB), using “H bulb” manufactured by Fusion UV Systems, Inc. to obtain an optical film A1. The optical film A1 has a layer structure of a cured layer of COP resin film / active energy ray curable resin composition A1 / COP resin film.

Example 2 Preparation of Optical Film A2 An optical film was prepared in the same manner as Example 1, except that the active energy ray curable resin composition was replaced with the active energy ray curable resin composition A2 obtained in Production Example 2. Film A2 was produced. The optical film A2 has a layer configuration of a COP resin film / a cured layer of an active energy ray curable resin composition A2 / COP resin film.

Production Example 1 Preparation of Polarizing Film A polyvinyl alcohol film having a degree of polymerization of about 2400, a degree of saponification of 99.9 mol%, and a thickness of 30 μm [trade name “Klare vignon VF-PE # 3000” manufactured by Kuraray Co., Ltd. After immersion in pure water at 37 ° C., it was immersed at 30 ° C. in an aqueous solution containing iodine and potassium iodide (iodine / potassium iodide / water (weight ratio) = 0.04 / 1.5 / 100). Then, it was immersed at 56.5 ° C. in an aqueous solution containing potassium iodide and boric acid (potassium iodide / boric acid / water (weight ratio) = 12 / 3.6 / 100). The film was washed with pure water at 10 ° C. and then dried at 85 ° C. to obtain a polarizer with a thickness of about 12 μm in which iodine was adsorbed and oriented to polyvinyl alcohol. Stretching was mainly performed in the iodine dyeing and boric acid treatment steps, and the total stretch ratio was 5.3.

Example 3 Preparation of Polarizing Plate A1 A resin film made of a cyclic polyolefin resin having a thickness of 23 μm (trade name “ZEONOR”, manufactured by Nippon Zeon Co., Ltd .; hereinafter referred to as “COP resin film”). The corona discharge treatment was applied to the surface of the above, and the active energy ray curable resin composition A1 was coated on the corona discharge treated surface using a bar coater such that the film thickness after curing was about 5.0 μm. The polarizing film produced in Production Example 1 was bonded to the coated surface to obtain a protective film-carrying polarizing film (1).
Next, a retardation film made of a triacetylcellulose-based resin having a thickness of 40 μm [trade name “KC4CW”, manufactured by Konica Minolta Co., Ltd .; hereinafter, it may be referred to as a TAC film. The corona discharge treatment was applied to the surface of the above, and the active energy ray curable resin composition A1 was coated on the corona discharge treated surface using a bar coater such that the film thickness after curing was about 5.0 μm. The coated surface and the polarizing film side of the polarizing film (1) with a protective film were bonded to obtain a laminate. From the protective film side of this laminate, using a UV light irradiation device with a belt conveyor (lamp used “H bulb” manufactured by Fusion UV Systems, Inc.), illuminance 250 mW / cm ² and integrated light quantity 250 mJ / cm ² (UVB) The curable adhesive composition was cured by irradiation with ultraviolet light to obtain a polarizing plate. This is called polarizing plate A1. The polarizing plate A1 has a constitution of a cured layer of a COP resin film / active energy ray curable resin composition A1 / a polarizing film / a cured layer of an active energy ray curable resin composition A1 / TAC film.

Example 4 Production of Polarizing Plate A2 A polarizing plate A2 was produced in the same manner as in Example 3, except that the active energy ray-curable resin composition was replaced with the active energy ray-curable resin composition A2. The polarizing plate A2 has a constitution of a cured layer of a COP resin film / active energy ray curable resin composition A2 / a polarizing film / a cured layer of active energy ray curable resin composition A2 / TAC film.

Comparative Example 1 Preparation of Polarizing Plate B A polarizing plate B was prepared in the same manner as the polarizing plate A except that the active energy ray curable resin composition was changed to the active energy ray curable resin composition B. The polarizing plate B has a structure of a cured layer of a COP resin film / active energy ray curable resin composition B / a polarizing film / a cured layer of active energy ray curable resin composition B / TAC film.

Synthesis Example 3 Synthesis of (Meth) Acrylic Resin In a reaction vessel equipped with a cooling pipe, a nitrogen introducing pipe, a thermometer and a stirrer, 81.8 parts of ethyl acetate as a solvent and butyl acrylate 70.4 as a monomer A solution obtained by mixing with 20.0 parts of methyl acrylate and 8.0 parts of 2-phenoxyethyl acrylate as mixed with 1.0 part of 2-hydroxyethyl acrylate and 0.6 parts of acrylic acid It is. After the air in the reaction vessel was replaced with nitrogen gas, the internal temperature was brought to 60.degree. Thereafter, a solution of 0.12 parts of azobisisobutyronitrile in 10 parts of ethyl acetate was added. After maintaining at the same temperature for 1 hour, while maintaining the internal temperature at 54 to 56 ° C., continuously add ethyl acetate at a rate of 17.3 parts / hr to the reaction vessel so that the concentration of the polymer is approximately 35%. Added. The internal temperature is kept at 54 to 56 ° C. until 12 hours have passed from the start of the addition of ethyl acetate, and then ethyl acetate is added to adjust the concentration of the polymer to 20%, and the (meth) acrylic resin An ethyl acetate solution was obtained. The weight average molecular weight Mw of the (meth) acrylic resin was 1,390,000, and the ratio Mw / Mn of the weight average molecular weight Mw to the number average molecular weight Mn was 5.32.

In addition, the measurement of a weight average molecular weight and a number average molecular weight uses four "TSK gel XL (made by Tosoh Corp.)" as a column in a GPC apparatus, and "Shodex GPC KF-802 (made by Showa Denko KK)" 1 piece, 5 pieces in total are connected in series, and using tetrahydrofuran as an eluent, the sample concentration is 5 mg / mL, the sample introduction amount is 100 μL, the temperature is 40 ° C, and the flow rate is 1 mL / min. Calculated by

Synthesis Example 4 Synthesis of (Meth) Acrylic Resin Adhesive Composition A The ethyl acetate solution (resin concentration: 20%) of the (meth) acrylic resin obtained in Synthesis Example 3 contained 100% solids of the solution. Mixed with 0.4 parts of a crosslinking agent (Coronate L, solid content 75%: manufactured by Tosoh Co., Ltd.) and 0.4 parts of a silane compound (manufactured by Shin-Etsu Chemical Co., Ltd .: KBM-403). Ethyl acetate was added so as to be% to obtain a pressure-sensitive adhesive composition. In addition, the compounding quantity of the said crosslinking agent is a weight part number as an active ingredient.

In addition, the detail of the crosslinking agent and silane compound which were used by the synthesis example 4 is as follows.
Crosslinking agent: Ethyl acetate solution (75% solid concentration) of trimethylolpropane adduct of tolylene diisocyanate, trade name "Corronate L" obtained from Tosoh Corporation.
Silane compound: 3-glycidoxypropyltrimethoxysilane, trade name "KBM403" obtained from Shin-Etsu Chemical Co., Ltd.

<Preparation of Pressure-Sensitive Adhesive Layer A>
Adhesive composition A was dried using an applicator on the release-treated surface of a separate film (trade name "PLR-382190" obtained from Lintec Co., Ltd.) made of a polyethylene terephthalate film subjected to release treatment It applied so that thickness of 20 micrometers might be set, and it dried at 100 degreeC for 1 minute, and produced the adhesive layer A.

Synthesis Example 5 Synthesis of (Meth) Acrylic Resin Adhesive Composition B1 In an ethyl acetate solution (resin concentration: 20%) of the (meth) acrylic resin obtained in Synthesis Example 3, the solid content of the solution was 100. Relative to 1 part, 0.4 parts of a crosslinking agent (Corronate L, solid content 75%: manufactured by Tosoh Corporation), 0.4 parts of a silane compound (manufactured by Shin-Etsu Chemical Co., Ltd .: KBM-403) Two parts of the absorbing compound (1) were mixed, and ethyl acetate was further added so that the solid concentration would be 14%, to obtain a pressure-sensitive adhesive composition B1. In addition, the compounding quantity of the said crosslinking agent is a weight part number as an active ingredient.

Synthesis Example 6 Synthesis of (meth) acrylic resin pressure-sensitive adhesive composition B2 A synthesis example except that 1 part of the photoselective absorptive compound (2) was used instead of 2 parts of the photoselective absorptive compound (1) In the same manner as in 5, a pressure-sensitive adhesive composition B2 was obtained.

<Preparation of pressure-sensitive adhesive layer B1>
After drying adhesive composition B1 using an applicator on the release-treated surface of a separate film (trade name "PLR-382190" obtained from Lintec Co., Ltd.) obtained from a polyethylene terephthalate film subjected to release treatment The solution was applied to a thickness of 20 μm and dried at 100 ° C. for 1 minute to prepare a pressure-sensitive adhesive layer B1.

A pressure-sensitive adhesive layer B2 was produced in the same manner except that the pressure-sensitive adhesive composition B1 was replaced with the pressure-sensitive adhesive composition B2.

<Preparation of polarizing plate with pressure-sensitive adhesive layer>
Example 5 Preparation of Pressure-Sensitive Adhesive Layer-Containing Polarizing Plate A1 The surface of the triacetylcellulose-based resin film of the polarizing plate A1 is subjected to corona treatment, and the pressure-sensitive adhesive layer A produced above is bonded with a laminator, It aged for 7 days on 23 degreeC and the conditions of 65% of relative humidity, and obtained polarizing plate A1 with an adhesive layer.

Example 6 Preparation of Pressure-Sensitive Adhesive Layer-Containing Polarizing Plate A2 A pressure-sensitive adhesive layer-attached polarizing plate A2 was obtained in the same manner as in Example 5, except that the polarizing plate A1 was replaced with the polarizing plate A2.

Comparative Example 2 Preparation of Pressure-Sensitive Adhesive Layer-Containing Polarizing Plate B1 The surface of the triacetylcellulose-based resin film of polarizing plate B is subjected to corona treatment, and pressure-sensitive adhesive layer B1 manufactured above is bonded with a laminator, It aged for 7 days on 23 degreeC and the conditions of 65% of relative humidity, and obtained polarizing plate B1 with an adhesive layer.

Comparative Example 3 Production of Pressure-Sensitive Adhesive Layer-Containing Polarizing Plate B2 A pressure-sensitive adhesive layer-attached polarizing plate B2 was obtained in the same manner as in Comparative Example 2 except that the pressure-sensitive adhesive layer B1 was replaced with the pressure-sensitive adhesive layer B2.

<Absorbance measurement of optical film>
The optical film A1 was cut into a size of 30 mm × 30 mm and used as a sample. The absorbance of the prepared sample in the wavelength range of 300 to 800 nm was measured using a spectrophotometer (UV-2450: manufactured by Shimadzu Corporation). The results are shown in Table 1.
The sample after measurement was stored in an oven at a temperature of 95 ° C. for 48 hours, and a heat resistance evaluation test was performed. The absorbance of the sample after storage was measured, and the absorbance retention of the optical film A1 was determined based on the following equation. The results are shown in Table 1. The higher the absorbance retention rate, the better the heat resistance without deterioration of the light selective absorption function. The absorbance of the COP resin film alone was almost zero.
Absorbance retention rate = (A (405) after endurance test / A (405) before endurance test) x 100

Absorbance was measured in the same manner as described above except that the optical film A1 was replaced with the optical film A2. The results are shown in Table 1.

<Absorbance measurement of polarizing plate with adhesive>
The pressure-sensitive adhesive layer-attached polarizing plate A1 was cut into a size of 30 mm × 30 mm, and the pressure-sensitive adhesive layer was bonded to an alkali-free glass (trade name “EAGLE XG” manufactured by Corning Co., Ltd.) to obtain a sample. The absorbance of the prepared sample in the wavelength range of 300 to 800 nm was measured using a spectrophotometer (UV-2450: manufactured by Shimadzu Corporation). A (405) was 0.6, A (440) was 0.05, and A (405) / A (440) was 12.7.
The sample after measurement was stored in an oven at a temperature of 95 ° C. for 48 hours, and a heat resistance evaluation test was performed. The absorbance of the sample after storage was measured, and the absorbance retention of the pressure-sensitive adhesive layer-attached polarizing plate A1 was determined in the same manner as described above. The result was 94%.
In addition, the light absorbency in wavelength 405nm and wavelength 440nm of each of a TAC film single-piece | unit, COP resin film single-piece | unit, and an alkali free glass was substantially zero.

Absorbance was measured in the same manner as described above except that the pressure-sensitive adhesive layer-attached polarizing plate A1 was replaced with the pressure-sensitive adhesive layer-attached polarizing plate A2. As a result, A (405) was 0.5, A (440) was 0.05, A (405) / A (440) was 9.5, and the absorbance retention was 98%.

<Evaluation of migration of light selective absorption compound>
The transferability of the light selective absorption compound to the film was evaluated by the following method.
Device name: Fourier transform infrared spectrophotometer Cary 660 FTIR (manufactured by Agilent Technologies)
Method: ATR method (crystal: diamond) using MCT (cadmium telluride mercury) as a detector

The triacetyl cellulose was peeled off from the polarizing plate A1 prepared in Example 3, and the triacetyl cellulose surface after peeling was subjected to FTIR measurement by the ATR method. The peak at 1550 to 1560 cm ^-1 derived from the photoselective absorptivity compound (1) was confirmed.
Subsequently, the polarizing plate A1 was stored in an oven at a temperature of 95 ° C. for 48 hours, and as a result of performing FTIR measurement using the same method, 1550 to 1560 cm ⁻ derived from the photoselective absorption compound (1) on the triacetylcellulose surface An increase of the ¹ peak could not be confirmed.
Since an increase in the peak derived from the photoselective absorption compound (1) could not be confirmed in the surface layer on the triacetylcellulose surface after heating, it was judged that there was no migration of the photoselective absorption compound (1). The results are shown in Table 2.

The pressure-sensitive adhesive layer was physically removed from the polarizing plate B1 prepared in Comparative Example 2, and the triacetylcellulose surface after removal was confirmed by the above method. As a result, 1550 to 1560 cm ⁻ derived from the photoselective absorptive compound (1) The peak of ¹ was confirmed.
Subsequently, the polarizing plate B1 was stored in an oven at a temperature of 95 ° C. for 48 hours, and as a result of performing FTIR measurement using the same method, 1550 to 1560 cm ⁻ derived from the photoselective absorptive compound (1) on the triacetylcellulose surface An increase of the ¹ peak was confirmed.
From the fact that an increase in the peak derived from the photoselective absorption compound (1) could be confirmed in the surface layer of triacetyl cellulose after heating, it was judged that there was migration of the photoselective absorption compound (1). The results are shown in Table 2.

The migration evaluation of the light selective absorption compound in the polarizing plate A1 manufactured in Example 3 and the polarizing plate B2 manufactured in Comparative Example 3 was performed in the same manner as described above. The results are shown in Table 2.

The optical film of the present invention not only has a high function of selectively absorbing light near a wavelength of 400 nm (405 nm), but also a compound that selectively absorbs light near a wavelength of 400 nm (405 nm) is transferred to other layers It is possible to suppress the deterioration of the retardation film etc.

The optical film of the present invention has good display properties, and can suppress deterioration of the optical film due to visible light of short wavelength.

10 Optical film 10A, 10B, 10C Optical laminate 1 Light selective absorption layer 2 Resin film (a)
DESCRIPTION OF SYMBOLS 3

Polarizing film

4, 7, 60 Adhesive layer 5 Protective film 6 Polarizing film 30 Adhesive layer 40 Optical film 50, 50a 1⁄4 wavelength retardation layer 70 1/2 wavelength retardation layer 80 Positive C layer 110 Light emitting element

Claims

An optical film comprising at least one light selective absorption layer formed from an active energy ray curable composition and satisfying the following formula (1).
A (405) 0.5 0.5 (1)
[In Formula (1), A (405) represents the absorbance at a wavelength of 405 nm. ]
Furthermore, the optical film of Claim 1 which satisfy | fills following formula (2).
A (440) ≦ 0.1 (2)
[In Formula (2), A (440) represents the light absorbency in wavelength 440nm. ]
The optical film of Claim 1 or 2 which satisfy | fills following formula (3).
A (405) / A (440) ≧ 5 (3)
[In Formula (3), A (405) represents the absorbance at a wavelength of 405 nm, and A (440) represents the absorbance at a wavelength of 440 nm. ]
The optical film according to any one of claims 1 to 3, wherein the storage elastic modulus E at 23 ° C of the light selective absorption layer is 100 MPa or more.
The photoselective absorption layer is a layer formed from an active energy ray-curable composition comprising a photocurable component (A), a photoselective absorption compound (B) and a photopolymerization initiator (C). Optical film to any of four.
The optical film according to claim 5, wherein the content of the photoselective absorption compound (B) is 0.01 to 20 parts by mass with respect to 100 parts by mass of the photocurable component (A).
The optical film according to claim 5 or 6, wherein the light selective absorption compound (B) is a compound satisfying the following formula (4).
ε (405) 20 20 (4)
[In Formula (4), (epsilon) (405) represents the gram absorption coefficient of a compound in wavelength 405 nm. The unit of gram absorption coefficient is L / (g · cm). ]
The optical film according to claim 7, wherein the photoselective absorption compound (B) is a compound satisfying the formula (5).
ε (405) / ε (440) ≧ 20 (5)
[In Formula (5), (epsilon) (405) represents the gram absorption coefficient of the compound in wavelength 405 nm, and (epsilon) (440) represents the gram absorption coefficient in wavelength 440 nm. ]
The optical film according to any one of claims 6 to 8, wherein the photocurable component (A) contains at least one selected from the group consisting of (meth) acryloyloxy group-containing compounds and epoxy compounds.
An optical film with an adhesive layer having an adhesive layer on at least one surface of the optical film according to any one of claims 1 to 9.
The display apparatus which has an optical film with an adhesive layer of Claim 10.