JP2019008294A - Optical film - Google Patents

Abstract

Provided is a post-secondary film having a good suppression function for deterioration of a retardation film or an organic EL light-emitting element due to ultraviolet rays by exhibiting high absorption selectivity for visible light having a short wavelength near 405 nm. An optical film including at least one light selective absorption layer and at least one oxygen shielding layer and satisfying the following formulas (1) and (2). A (405) ≧ 0.5 (1) Oxygen permeability ≦ 500 (2) [In the formula (1), A (405) represents absorbance at a wavelength of 405 nm. ] [Selection figure] None

Description

  The present invention relates to an optical film.

  Various members such as an organic EL element, a display element such as a liquid crystal cell, and an optical film such as a polarizing plate are used in a display apparatus (FPD: flat panel display) such as an organic EL display apparatus and a liquid crystal display apparatus. Since organic EL compounds and liquid crystal compounds used for these members are organic substances, deterioration due to ultraviolet rays (UV) tends to be a problem. In order to solve such a problem, for example, Patent Document 1 discloses a polarizing plate in which an ultraviolet absorbent having excellent ultraviolet absorbing ability in a wavelength region of 370 nm or less is added to a protective film of the polarizing plate.

JP 2006-308936 A

  In addition, with the progress of thinning of display devices in recent years, development of a liquid crystal retardation film obtained by aligning and photocuring a polymerizable liquid crystal compound has been advanced. It has become clear that these liquid crystal phase difference films and organic EL light emitting elements tend to deteriorate not only with ultraviolet light but also with short wavelength visible light. However, the polarizing plate described in Patent Document 1 has a low ability to absorb visible light in the vicinity of 400 nm, even though it has an excellent ultraviolet absorbing ability in a wavelength region of 370 nm or less, and deterioration of a liquid crystal retardation film or an organic EL light emitting element. In some cases, the suppression was not sufficient. Further, in recent display devices, better display characteristics have been demanded.

  The objective of this invention is providing the optical film which has a favorable suppression function about deterioration by visible light of a short wavelength of retardation film or an organic electroluminescent light emitting element.

The present invention includes the following inventions.
[1] An optical film including at least one light selective absorption layer and at least one oxygen shielding layer and satisfying the following formulas (1) and (2):
A (405) ≧ 0.5 (1)
Oxygen permeability ≦ 500 (2)
[In Formula (1), A (405) represents the light absorbency in wavelength 405nm. ]
[2] The optical film according to [1], which satisfies the following formula (3).
A (440) ≦ 0.1 (3)
[In Formula (1), A (440) represents the light absorbency in wavelength 440nm. ]
[3] The optical film according to [1] or [2], further satisfying the 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 light selective absorption layer is a pressure-sensitive adhesive layer having a light selective absorption function.
[5] The light selective absorption layer is a pressure sensitive adhesive layer formed from a pressure sensitive adhesive composition containing a (meth) acrylic resin (A), a crosslinking agent (B), and a light selective absorption compound (C). The optical film described in 1.
[6] The optical film according to [5], wherein the content of the crosslinking agent (B) is 0.01 to 15 parts by mass with respect to 100 parts by mass of the (meth) acrylic resin (A).
[7] The content of the light selective absorption compound (C) is 0.01 to 20 parts by mass with respect to 100 parts by mass of the (meth) acrylic resin (A), according to [5] or [6] Optical film.
[8] The optical film according to any one of [5] to [7], wherein the light selective absorption compound (C) is a compound satisfying the following formula (5).
ε (405) ≧ 20 (5)
[In Formula (5), (epsilon) (405) represents the gram extinction coefficient of the compound in wavelength 405nm. ]
[9] The optical film according to [8], wherein the light selective absorption compound (C) is a compound satisfying the following formula (6).
ε (405) / ε (440) ≧ 20 (6)
[In formula (6), ε (405) represents the gram extinction coefficient of the compound at a wavelength of 405 nm, and ε (440) represents the gram extinction coefficient at a wavelength of 440 nm. ]
[10] The optical film according to any one of [5] to [9], wherein the light selective absorption compound (C) is a compound having a merocyanine structure in the molecule.
[11] The oxygen shielding layer is at least one resin selected from polyester resin (E), polyvinyl alcohol resin (F), polyamide resin (G), polyimide resin (H), and cellulose resin (I). The optical film according to any one of [1] to [10], which is a resin layer formed from
[12] The optical film according to any one of [1] to [11], wherein the oxygen shielding layer is a polarizing film formed from a polyvinyl alcohol-based resin.
[13] A display device including the optical film of [1] to [12].

  The optical film of the present invention has a high suppression function with respect to deterioration of a retardation film or an organic EL light emitting element due to visible light having a short wavelength by exhibiting high absorption selectivity with respect to visible light having a short wavelength near 405 nm. Moreover, the optical film of the present invention exhibits high absorption selectivity with respect to short-wavelength visible light in the vicinity of a wavelength of 405 nm even after the weather resistance test, and can suppress the deterioration due to short-wavelength visible light. When the optical film of the present invention is used in a display device, good display characteristics and durability can be imparted.

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

The optical film of the present invention is an optical film including at least one light selective absorption layer and at least one oxygen shielding layer and satisfying the following formulas (1) and (2).
A (405) ≧ 0.5 (1)
Oxygen permeability ≦ 500 (2)
[In Formula (1), A (405) represents the light absorbency in wavelength 405nm. ]

  The larger the value of A (405), the higher the absorption at a wavelength of 405 nm. When the value of A (405) is less than 0.5, the absorption at a wavelength of 405 nm is low, and the level in ultraviolet or short wavelength visible light is low. The effect of suppressing deterioration of a display device such as a phase difference film or an organic EL element 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 inhibiting weather resistance deterioration. There is no particular upper limit, but it is usually 10 or less.

  The smaller the value of oxygen permeability, the less oxygen permeation of the optical film. When the value of oxygen permeability is 500 or less, it is difficult for oxygen to permeate, and the light selective absorption layer itself has ultraviolet rays and short wavelength visible light. It is possible to suppress deterioration due to. The value of oxygen permeability is preferably 100 or less, more preferably 50 or less. The unit of oxygen permeability is “cm 3 / (m 2 · 24 h · atm)”. The oxygen permeability can be measured according to the method described in JIS K 7126-1.

The optical film of the present invention preferably further satisfies the following formula (3).
A (440) ≦ 0.1 (3)
[In Formula (1), 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, there is a tendency that good color expression in the display device is impaired. In addition, since the display device tends to inhibit light emission, the luminance of the display device may also decrease. The value of A (440) is preferably 0.05 or less, more preferably 0.04 or less, and particularly preferably 0.03 from the viewpoint of suppressing the light emission inhibition of the display device. The lower limit is not particularly limited, but is usually 0.00001 or more.

The optical film of the present invention preferably further satisfies the following formula (4).
A (405) / A (440) ≧ 5 (4)
[In Formula (4), 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 with respect to the magnitude of absorption at a wavelength of 440 nm. The larger this value is, the more specific absorption is in the wavelength region near 405 nm. Represent. The value of A (405) / A (440) is preferably 10 or more, more preferably 30 or more, and particularly preferably 60 or more.

  The film of the present invention is usually 0.2 μm to 600 μm.

<Light selective absorption layer>
The light selective absorption layer is a layer having high absorption performance with respect to light having a wavelength of 405 nm, and satisfies the above formula (1). The light selective absorption layer may be any layer forming an optical film, but is preferably an adhesive layer having a light selective absorption function. The pressure-sensitive adhesive layer having a light selective absorption function is formed from a pressure-sensitive adhesive composition having a light selective absorption function.
The thickness of the light selective absorption layer (preferably a pressure-sensitive adhesive layer having a light selective absorption function) is usually 0.1 μm to 50 μm, preferably 1 μm to 30 μm, and more preferably 4 μm to 20 μm.

  The pressure-sensitive adhesive composition having a light selective absorption function is preferably a pressure-sensitive adhesive composition containing a light-absorbing compound (C), a resin (A) and a crosslinking agent (B), and further contains a silane compound (D). A pressure-sensitive adhesive composition is more preferable.

The light-absorbing compound (C) is a compound that selectively absorbs light having a wavelength of 405 nm, preferably a compound that satisfies the formula (5), and more preferably a compound that satisfies the formula (6). .
ε (405) ≧ 20 (5)
[In Formula (5), (epsilon) (405) represents the gram extinction coefficient of the compound in wavelength 405nm. The unit of the gram extinction coefficient is L / (g · cm). ]
ε (405) / ε (440) ≧ 20 (6)
[In formula (6), ε (405) represents the gram extinction coefficient of the compound at a wavelength of 405 nm, and ε (440) represents the gram extinction coefficient at a wavelength of 440 nm. ]
The gram absorbance coefficient can be measured by the method described in the examples.

  A compound having a larger ε (405) value absorbs light having a wavelength of 405 nm and suppresses deterioration of the retardation film in ultraviolet light or visible light having a short wavelength. When the value of ε (405) is less than 20 L / (g · cm), the content of the light selective absorption compound (C) in the light selective absorption layer is not increased, and the ultraviolet rays of the retardation film and the organic EL light emitting device In addition, the deterioration suppressing function due to visible light having a short wavelength tends to be hardly exhibited. When the content of the light selective absorption compound (C) increases, the light selective absorption compound (C) in the light selective absorption layer may bleed out or disperse unevenly, resulting in insufficient light absorption function. . 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 with a larger ε (405) / ε (440) value absorbs light near 405 nm without inhibiting the 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.

［式中、Ｒ^１及びＲ^５は、それぞれ独立して、水素原子、置換基を有していてもよい炭素数１〜２５のアルキル基、置換基を有していてもよい炭素数７〜１５のアラルキル基、炭素数６〜１５のアリール基、複素環基を表し、該アルキル基又はアラルキル基に含まれる−ＣＨ_２−は−ＮＲ^１Ａ−、−ＣＯ−、−ＳＯ_２−、−Ｏ−又は−Ｓ−に置換されていてもよい。
Ｒ^１Ａは、水素原子又は炭素数１〜６のアルキル基を表す。
Ｒ^２、Ｒ^３及びＲ^４は、それぞれ独立して、水素原子、置換基を有していてもよい炭素数１〜６のアルキル基、置換基を有していてもよい芳香族炭化水素基又は置換基を有していてもよい芳香族複素環基を表し、該アルキル基に含まれる−ＣＨ_２−は−ＮＲ^１Ｂ−、−ＣＯ−、−ＮＯ_２−、−Ｏ−又は−Ｓ−で置換されていてもよい。
Ｒ^１Ｂは、水素原子又は炭素数１〜６のアルキル基を表す。
Ｒ^６及びＲ^７は、それぞれ独立して、水素原子、炭素数１〜２５のアルキル基又は電子吸引性基を表すか、Ｒ^６及びＲ^７は互いに連結して環構造を形成してもよい。
Ｒ^１及びＲ^２は互いに連結して環構造を形成してもよく、Ｒ^２及びＲ^３は互いに連結して環構造を形成してもよく、Ｒ^２及びＲ^４は互いに連結して環構造を形成してもよく、Ｒ^３及びＲ^６は、互いに連結して環構造を形成してもよい。］ The photoselective absorption compound (C) is preferably a compound containing a merocyanine structure in the molecule. The compound containing a merocyanine structure is a compound containing in its molecule a partial structure represented by — (N—C═C—C═C) —, for example, a merocyanine compound, a cyanine compound, an indole Compounds, benzotriazole compounds, and the like, preferably merocyanine compounds, cyanine compounds, and benzotriazole compounds.
The light selective absorption compound (c) is preferably a compound represented by the formula (I) (hereinafter sometimes referred to as the compound (I)).

[Wherein, R ¹ and R ⁵ each independently represent a hydrogen atom, an optionally substituted alkyl group having 1 to 25 carbon atoms, or an optionally substituted carbon group having 7 to 7 carbon atoms. 15 represents an aralkyl group, an aryl group having 6 to 15 carbon atoms, or a heterocyclic group, and —CH ₂ — contained in the alkyl group or aralkyl group represents —NR ^1A —, —CO—, —SO ₂ —, —O. -Or -S- may be substituted.
R ^1A represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.
R ² , R ³ and R ⁴ are each independently a hydrogen atom, an optionally substituted alkyl group having 1 to 6 carbon atoms, or an optionally substituted aromatic hydrocarbon group. 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—. 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 connected to each other to form a ring structure, R ² and R ³ may be connected to each other to form a ring structure, and R ² and R ⁴ are connected to each other to form a ring structure. 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 a methyl group, an ethyl group, an n-propyl group, an isopropyl group, a 2-cyanopropyl group, an n-butyl group, a tert-butyl group, Examples include sec-butyl group, n-pentyl group, n-hexyl group, 1-methylbutyl group, 3-methylbutyl group, n-octyl group, n-decyl, 2-hexyl-octyl group and the like.
Examples of the substituent that 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 group, hydroxy group, carboxy group, sulfo group, cyano group, amino group, halogen atom, alkoxy group having 1 to 6 carbon atoms, alkylsilyl group having 1 to 12 carbon atoms, alkyl having 2 to 8 carbon atoms Carbonyl group, * —R ^a1 — (O—R ^a2 ) _t1 —R ^a3 (R ^a1 and R ^a2 each independently represents an alkanediyl group having 1 to 6 carbon atoms, and R ^a3 represents 1 to C 1 carbon atoms, 6 represents an alkyl group, and s1 represents an integer of 1 to 3).

Examples of the alkylsilyl group having 1 to 12 carbon atoms include monoalkylsilyl groups such as methylsilyl group, ethylsilyl, and propylsilyl group; dialkylsilyl groups such as dimethylsilyl group, diethylsilyl group, and methylethylsilyl group; trimethylsilyl, 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.
Examples of the halogen atom include a fluorine atom, a chlorine atom, and a bromine atom.

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 with —SO ₂ — or —COO— include a 2-phenylethyl acetate group.
Examples of the substituent that the aralkyl group having 7 to 15 carbon atoms represented by R ¹ and R ⁵ may have include the groups described in the above group A.
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 that the aryl group having 6 to 15 carbon atoms represented by R ¹ and R ⁵ may have include those 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 group, pyrrolidyl group, quinolyl group, thiophene group, imidazolyl group, oxazolyl group, pyrrole group, thiazolyl group, and furanyl group. The aromatic heterocyclic group of number 3-9 is mentioned.

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 -A pentyl group, n-hexyl group, etc. are mentioned.

The R ^{2, R 3} and an alkyl group having 1 to 6 carbon atoms represented by ^{R 4,} include those similar to the alkyl group having 1 to 6 carbon atoms represented by ^{R 1B.}
Examples of the substituent that the alkyl group having 1 to 6 carbon atoms represented by R ² , R ^3, and R ⁴ may have include those described in Group A above.
Examples of the aromatic hydrocarbon group represented by R ² , R ³ and R ⁴ include aryl groups having 6 to 15 carbon atoms such as phenyl group, naphthyl group and anthracenyl group; 7 to 7 carbon atoms such as benzyl group and phenylethyl group. There are 15 aralkyl groups.
Examples of the substituent that the aromatic hydrocarbon group represented by R ² , R ^3, and R ⁴ may have include those described in Group A above.
Examples of the aromatic heterocycle represented by R ² , R ³ and R ⁴ include 3 carbon atoms such as pyridyl group, pyrrolidyl group, quinolyl group, thiophene group, imidazolyl group, oxazolyl group, pyrrole group, thiazolyl group and furanyl group. -9 aromatic heterocyclic groups.
Examples of the substituent that the aromatic heterocyclic ring represented by R ² , R ^3, and R ⁴ may have include the groups described in Group A above.

The alkyl group having 1 to 25 carbon atoms represented by R ⁶ and ^{R 7,} include those similar to the alkyl group having 1 to 25 carbon atoms represented by ^{R 1} and ^{R 5.}
Examples of the substituent that the alkyl group having 1 to 25 carbon atoms represented by R ⁶ and R ⁷ may have include those described in Group A above.

［式中、Ｒ^１１は、水素原子又は炭素数１〜２５のアルキル基を表し、該アルキル基に含まれるメチレン基の少なくとも１つは酸素原子に置換されていてもよい。
Ｘ^１は、−ＣＯ−、−ＣＯＯ−、−ＯＣＯ−、−ＣＳ−、−ＣＳＳ−、−ＣＯＳ−、−ＮＲ^１２ＣＯ−又はＣＯＮＲ^１３−を表す。
Ｒ^１２及びＲ^１３は、それぞれ独立して、水素原子、炭素数１〜６のアルキル基又はフェニル基を表す。］ 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 the 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 with an oxygen atom.
X ¹ represents —CO—, —COO—, —OCO—, —CS—, —CSS—, —COS—, —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. ]

Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
Examples of the alkyl group substituted with a halogen atom include a trifluoromethyl group, a perfluoroethyl group, a perfluoropropyl group, a perfluoroisopropyl group, a perfluorobutyl group, a perfluorosec-butyl group, a perfluorotert-butyl group, a perfluoropentyl group, and Examples include perfluoroalkyl groups such as perfluorohexyl groups. As carbon number of the alkyl group substituted by the halogen atom, it is 1-25 normally.

Examples of the alkyl group having 1 to 25 carbon atoms represented by R ¹¹ include the same alkyl groups represented by R ¹ and R ⁵ .
As a C1-C6 alkyl group represented by R < ¹² > and R < ¹³ >, the same thing as the alkyl group represented by C1-C6 represented by R ^<1A > is mentioned.

R ⁶ and R ⁷ may be linked to each other to form a ring structure. Examples of the ring structure formed from R ⁶ and R ⁷ include a Meldrum's acid structure, a barbituric acid structure, and a dimedone structure. It is done.

The ring structure formed by combining R ² and R ³ with each other is a nitrogen-containing ring structure containing a nitrogen atom bonded to R ² , for example, a 4- to 14-membered nitrogen-containing heterocyclic ring. Can be mentioned. The ring structure formed by connecting R ² and R ³ to each other may be monocyclic or polycyclic. Specific examples include a pyrrolidine ring, a pyrroline ring, an imidazolidine ring, an imidazoline ring, an oxazoline ring, a thiazoline ring, a piperidine ring, a morpholine ring, a piperazine ring, an indole ring, and an isoindole ring.

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, for example, a 4- to 14-membered ring (preferably 4- to 8-membered) nitrogen-containing heterocycles. The ring structure formed by connecting R ¹ and R ² to each other may be monocyclic or polycyclic. Specific examples include the same ring structure formed by connecting R ² and R ³ to each other.

Examples of the ring structure formed by combining R ² and R ⁴ with each other include 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 combining R ² and R ⁴ with each other may be monocyclic or polycyclic. These rings may have a substituent, and examples of such a ring structure include those exemplified as the ring structure formed by R ² and R ³ .

The ring structure formed by connecting 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.

［式（Ｉ−Ａ）、式（Ｉ−Ｂ）中、Ｒ^１、Ｒ^３、Ｒ^４、Ｒ^５、Ｒ^６及びＲ^７は、それぞれ上記と同じ意味を表す。
環Ｗ^１及び環Ｗ^２は、それぞれ独立して、含窒素環を表す。］ Examples of the compound represented by the formula (I) in which R ² and R ³ are linked to each other to form a ring structure include the compound represented by the formula (IA), and R ² and R ⁴ are Examples of the compound represented by the formula (I) which is linked to form a ring structure include a compound represented by the formula (IB).

[In formula (IA) and formula (IB), R ¹ , R ³ , R ⁴ , R ⁵ , R ⁶ and R ⁷ each have 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 ring structural unit. Ring W ¹ and ring W ² may be monocyclic or polycyclic, and may contain a hetero atom other than nitrogen as a structural unit of the ring. Ring W ¹ and ring W ² are preferably each independently a 5-membered to 9-membered ring.

［式（Ｉ−Ａ）中、Ｒ^１、Ｒ^４、Ｒ^５、Ｒ^６及びＲ^７は、それぞれ上記と同じ意味を表す。
Ａ^１は、−ＣＨ_２−、−Ｏ−、−Ｓ−又は−ＮＲ^１Ｄ−を表す。
Ｒ^１４及びＲ^１５は、それぞれ独立して、水素原子又は炭素数１〜１２のアルキル基を表す。
Ｒ^１Ｄは、水素原子又は炭素数１〜６のアルキル基を表す。］ 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 —.
R ¹⁴ and R ¹⁵ each independently represent 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. ]

［式（Ｉ−Ｂ−１）中、Ｒ^１、Ｒ^６及びＲ^７は、それぞれ上記と同じ意味を表す。
Ｒ^１６は、それぞれ独立して、水素原子又は炭素数１〜１２のアルキル基、アリール基を表す。］ 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 formula (IB-1), R ¹ , R ⁶ and R ⁷ each represent the same meaning as described above.
R ¹⁶ each independently represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or an aryl group. ]

［式（Ｉ−Ｂ−２）中、Ｒ^３、Ｒ^５、Ｒ^６及びＲ^７は、それぞれ上記と同じ意味を表す。
Ｒ^３０は、水素原子、シアノ基、ニトロ基、ハロゲン原子、メルカプト基、アミノ基、炭素数１〜１２のアルキル基、炭素数１〜１２のアルコキシ基、炭素数６〜１８の芳香族炭化水素基、炭素数２〜１３のアシル基、炭素数２〜１３のアシルオキシ基又は炭素数２〜１３のアルコキシカルボニル基を表す。
Ｒ^３１は、炭素数１〜１２のアルキル基、炭素数１〜１２のアルコキシ基、メルカプト基、炭素数１〜１２のアルキルチオ基、置換基を有していてもよいアミノ基又は複素環基を表す。］

[In formula (IB-2), R ³ , R ⁵ , R ⁶ and R ⁷ each represent the same meaning as described above.
R ³⁰ is 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, or an aromatic hydrocarbon having 6 to 18 carbon atoms. Group, a C2-C13 acyl group, a C2-C13 acyloxy group, or a C2-C13 alkoxycarbonyl group.
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 a heterocyclic group which may have a substituent. Represent. ]

Examples of the halogen atom represented by R ³⁰ include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
The acyl group having a carbon number of 2 to 13 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 methylcarbonyloxy group, an ethylcarbonyloxy group, a propylcarbonyloxy group, and a butylcarbonyloxy 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, and a butoxycarbonyl group.
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; and 7 carbon atoms such as benzyl group and phenylethyl group. -18 aralkyl groups.
Examples of the alkyl group having 1 to 12 carbon atoms represented by R ^30, include those similar to 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 those similar to the alkyl group having 1 to 12 carbon atoms represented by ^{R 14.}
The alkoxy group having 1 to 12 carbon atoms represented by R ^31, include those similar to the alkoxy group having 1 to 12 carbon atoms 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 optionally having a substituent represented by R ³¹ is an amino group; substituted with one alkyl group having 1 to 8 carbon atoms such as an N-methylamino group or an N-ethylamino group. An amino group; an amino group substituted with two alkyl groups having 1 to 8 carbon atoms such as an N, N-dimethylamino group, an N, N-diethylamino group, and an N, N-methylethylamino group;
Examples of the heterocyclic ring represented by R ³¹ include nitrogen-containing heterocyclic groups having 4 to 9 carbon atoms such as a pyrrolidinyl group, piperidinyl group, and morpholinyl group.

［式（Ｉ−Ｃ）中、Ｒ^１、Ｒ^６及びＲ^７は上記と同じ意味を表す。
Ｒ^２１、Ｒ^２２は、それぞれ独立して、水素原子、炭素数１〜１２のアルキル基又はヒドロキシ基を表す。
Ｘ^２及びＸ^３は、それぞれ独立して、−ＣＨ_２−又は−Ｎ（Ｒ^２５）＝を表す。
Ｒ^２５は、水素原子、炭素数１〜２５のアルキル基、置換基を有していてもよい芳香族炭化水素基を表す。］ The compound represented by the formula (I) in which R ³ and R ⁶ are connected to each other to form a ring structure, and R ² and R ⁴ are bonded to each other to form a ring structure includes the compound represented by the formula (IC) The compound etc. which are represented by these are mentioned.

[In formula (IC), R ^1, R ⁶ and R ⁷ represent the same meaning as described above.
R ²¹ and R ²² each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or a hydroxy group.
X ² and X ³ each independently represent —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. ]

The alkyl group having 1 to 25 carbon atoms represented by R ^25, include those similar to 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 that the aromatic hydrocarbon group represented by R ²⁵ may have include a hydroxy group.

R ³ and R ⁶ are preferably each independently an electron-withdrawing group.

［式（Ｉ−D）中、Ｒ^４、Ｒ⁵、Ｒ⁷は上記と同じ意味を表す。
Ｒ^２5、Ｒ^２6、Ｒ^２7及びＲ^２8は、それぞれ独立して、水素原子、置換基を有してもよい炭素数１〜１２のアルキル基、ヒドロキシ基、アラルキル基を表す。］ 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 bonded to each other to form a ring structure includes the compound represented by the formula (ID) The compound etc. which are represented by these are mentioned.

[In the formula (ID), 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 represents a hydrogen atom, an alkyl group having 1 to 12 carbon atoms which may have a substituent, a hydroxy group or an aralkyl group. ]

As a C1-C12 alkyl group represented by R <^25> , R < ²⁶ >, R < ²⁷ > and R < ²⁸ >, the same thing as the C1-C12 alkyl group represented by R ^{< 1A>} and R ^<1B > is mentioned. Examples of the substituent that the alkyl group having 1 to 12 carbon atoms represented by R ²⁵ , R ²⁶ , R ²⁷ and R ²⁸ may have 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.

［式（Ｉ−Ｅ）中、Ｒ^１、Ｒ^３、Ｒ^４、Ｒ^５は、それぞれ上記と同じ意味を表す。
環Ｗ^３は、環状化合物を表す
環Ｗ^３は、５員環〜９員環の環であり、窒素原子、酸素原子、硫黄原子等のヘテロ原子を環の構成単位として含んでいてもよい。 Examples of compound (I) in which R ⁶ and R ⁷ are linked to each other to form a ring structure include compounds represented by formula (IE).

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

［式（Ｉ−Ｃ−１）中、Ｒ^１、Ｒ^２、Ｒ^３及びＲ^５は、それぞれ上記と同じ意味を表す。
Ｒ^１７、Ｒ^１８、Ｒ^１９、Ｒ^ｑは、それぞれ独立して、水素原子又は置換基を有してもよい炭素数１〜１２のアルキル基、アラルキル基、アリール基を表し、該アルキル基又はアラルキル基に含まれる−ＣＨ_２−基は−ＮＲ１Ｄ−、−Ｃ（＝Ｏ）−、−Ｃ（＝Ｓ）−、−Ｏ−、−Ｓ−に置換されていてもよく、Ｒ^１７及びＲ^１８は互いに連結して環構造を形成してもよく、Ｒ^１８及びＲ^１９は互いに連結して環構造を形成してもよく、Ｒ^１９及びＲ^ｑは、互いに連結して環構造を形成してもよい。ｍ、ｐ、ｑはそれぞれ独立して０〜３の整数を表す。］ The compound represented by the formula (IE) is preferably a compound represented by the formula (IE-1).

[In formula (I-C-1), R ¹ , R ² , R ³ and R ⁵ each have the same meaning as described above.
R ¹⁷ , R ¹⁸ , R ¹⁹ and R ^q each independently represents a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, an aralkyl group or an aryl group which may have a substituent, The —CH ₂ — group contained in the aralkyl group may be substituted with —NR1D—, —C (═O) —, —C (═S) —, —O—, —S—, and R ¹⁷ and R ¹⁸ may be connected to each other to form a ring structure, R ¹⁸ and R ¹⁹ may be connected to each other to form a ring structure, and R ¹⁹ and R ^q are connected to each other to form a ring structure. May be. m, p, q each independently represents an integer of 0-3. ]

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

  The content of the light selective absorption compound (C) is usually 0.01 to 20 parts by mass with respect to 100 parts by mass of the resin (A) (preferably (meth) acrylic resin (A)) described later, preferably Is 0.05-10 mass parts, More preferably, it is 0.1-5 mass parts, More preferably, it is 0.1-5 mass parts.

The resin (A) is preferably a (meth) acrylic acid resin (A).
The (meth) acrylic resin (A) is preferably a polymer containing a constituent unit derived from (meth) acrylic acid ester as a main component (preferably containing 50% by mass or more). A structural unit derived from a (meth) acrylate ester is a structural unit derived from a monomer other than one or more (meth) acrylate esters (for example, a structural unit derived from a monomer having a polar functional group). May be included. In the present specification, (meth) acrylic acid means that either acrylic acid or methacrylic acid may be used, and “(meth)” in the case of (meth) acrylate or the like has the same meaning. .

［式（Ｉ）中、Ｒ₁ は水素原子又はメチル基で表し、Ｒ₂ は炭素数１〜１４のアルキル基または炭素数７〜２０のアラルキル基を表し、該アルキル基または該アラルキル基の水素原子は、炭素数１〜１０のアルコキシ基で置き換わっていてもよい。］ Examples of (meth) acrylic acid esters include (meth) acrylic acid esters represented by the following formula (I).

[In formula (I), R ₁ represents a hydrogen atom or a methyl group, R ₂ represents an alkyl group having 1 to 14 carbon atoms or an aralkyl group having 7 to 20 carbon atoms, and hydrogen of the alkyl group or the aralkyl group. The atom may be replaced by an alkoxy group having 1 to 10 carbon atoms. ]

In the formula (I), R ₂ is preferably an alkyl group having 1 to 14 carbon atoms, and more preferably an alkyl group having 1 to 8 carbon atoms.

As the (meth) acrylic acid ester represented by the formula (I),
Methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, N-heptyl (meth) acrylate, n-octyl (meth) acrylate, n-nonyl (meth) acrylate, n-decyl (meth) acrylate, n-dodecyl (meth) acrylate, (meth) acrylic acid Linear alkyl esters of (meth) acrylic acid such as lauryl, stearyl (meth) acrylate;
I-propyl (meth) acrylate, i-butyl (meth) acrylate, t-butyl (meth) acrylate, i-pentyl (meth) acrylate, i-hexyl (meth) acrylate, (meth) acrylic acid Branches of (meth) acrylic acid such as 2-ethylhexyl, i-octyl (meth) acrylate, i-nonyl (meth) acrylate, i-stearyl (meth) acrylate, i-amyl (meth) acrylate, etc. Alkyl ester;
(Meth) acrylic acid cyclohexyl, (meth) acrylic acid isobornyl, (meth) acrylic acid adamantyl, (meth) acrylic acid dicyclopentanyl, (meth) acrylic acid cyclododecyl, (meth) acrylic acid methylcyclohexyl, ( An alicyclic skeleton-containing alkyl ester of (meth) acrylic acid, such as trimethylcyclohexyl (meth) acrylate, tert-butylcyclohexyl (meth) acrylate, cyclohexyl α-ethoxyacrylate;
(Meth) acrylic acid aromatic ring skeleton-containing ester such as (meth) acrylic acid phenyl;
Etc.
Moreover, the substituent containing (meth) acrylic-acid alkylester by which the substituent was introduce | transduced into the alkyl group in (meth) acrylic-acid alkylester can also be mentioned. The substituent of the substituent-containing (meth) acrylic acid alkyl ester is a group that replaces the hydrogen atom of the alkyl group, and specific examples thereof include a phenyl group, an alkoxy group, and a phenoxy group. Specific examples of the substituent-containing (meth) acrylic acid alkyl ester include 2-methoxyethyl (meth) acrylate, ethoxymethyl (meth) acrylate, phenoxyethyl (meth) acrylate, and (meth) acrylic acid 2- (2-phenoxyethoxy) ethyl, (meth) acrylic acid phenoxydiethylene glycol, (meth) acrylic acid phenoxypoly (ethylene glycol), and the like.

  These (meth) acrylic acid esters can be used alone or in combination.

  The (meth) acrylic resin (A) has a homopolymer glass transition temperature Tg of less than 0 ° C. and a structural unit derived from the (meth) acrylic acid alkyl ester (a1), and the homopolymer has a Tg of 0 ° C. or higher. It is preferable to contain the structural unit derived from the (meth) acrylic acid alkyl ester (a2). The inclusion of the structural unit derived from the acrylic acid alkyl ester (a1) and the structural unit derived from the acrylic acid alkyl ester (a2) is advantageous in increasing the high temperature durability of the pressure-sensitive adhesive layer. Literature values such as POLYMER HANDBOOK (Wiley-Interscience) can be adopted as the Tg of the (meth) acrylic acid alkyl ester homopolymer.

  Specific examples of the (meth) acrylic acid alkyl ester (a1) include ethyl acrylate, acrylic acid n- and i-propyl, acrylic acid n- and i-butyl, acrylic acid n-pentyl, acrylic acid n- and i. -Hexyl, n-heptyl acrylate, n- and i-octyl acrylate, 2-ethylhexyl acrylate, n- and i-nonyl acrylate, n- and i-decyl acrylate, n-dodecyl acrylate And (meth) acrylic acid alkyl ester having about 2 to 12 carbon atoms of the alkyl group.

  (Meth) acrylic-acid alkylester (a1) may use only 1 type, and may use 2 or more types together. Of these, n-butyl acrylate, n-octyl acrylate, 2-ethylhexyl acrylate, and the like are preferable from the viewpoint of followability and reworkability when the light selective absorption layer is laminated on another layer.

  The (meth) acrylic acid alkyl ester (a2) is a (meth) acrylic acid alkyl ester other than the (meth) acrylic acid alkyl ester (a1). Specific examples of the (meth) acrylic acid alkyl ester (a2) include methyl acrylate, cyclohexyl acrylate, isobornyl acrylate, stearyl acrylate, t-butyl acrylate, and the like.

  Only 1 type may be used for the (meth) acrylic-acid alkylester (a2), and 2 or more types may be used together. Among these, from the viewpoint of high temperature durability, the (meth) acrylic acid alkyl ester (a2) preferably contains methyl acrylate, cyclohexyl acrylate, isobornyl acrylate, and the like, and more preferably contains methyl acrylate.

  The structural unit derived from the (meth) acrylic acid ester represented by the formula (I) is preferably 50% by mass or more in the total structural units contained in the (meth) acrylic resin (A), and is 60 to 95. It is preferable that it is mass%, and it is more preferable that it is 65-95 mass% or more.

As a structural unit derived from a monomer other than (meth) acrylic acid ester, a structural unit derived from a monomer having a polar functional group is preferable, and a structure derived from (meth) acrylic acid ester having a polar functional group Units are more preferred. Examples of the polar functional group include a hydroxy group, a carboxyl group, a substituted or unsubstituted amino group, and a heterocyclic group such as an epoxy group.
As a monomer having a polar functional group,
1-hydroxymethyl (meth) acrylate, 1-hydroxyethyl (meth) acrylate, 1-hydroxyheptyl (meth) acrylate, 1-hydroxybutyl (meth) acrylate, 1-hydroxypentyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 2-hydroxypentyl (meth) acrylate, 2-hydroxyhexyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate, 3-hydroxypentyl (meth) acrylate, 3-hydroxyhexyl (meth) acrylate, 3-hydroxyheptyl (meth) acrylate, (Meth) acrylic acid 4-hydroxybutyl, (meth) 4-hydroxypentyl crylate, 4-hydroxyhexyl (meth) acrylate, 4-hydroxyheptyl (meth) acrylate, 4-hydroxyoctyl (meth) acrylate, 2-chloro-2-hydroxypropyl (meth) acrylate (Meth) acrylate 3-chloro-2-hydroxypropyl, (meth) acrylate 2-hydroxy-3-phenoxypropyl, (meth) acrylate 5-hydroxypentyl, (meth) acrylate 5-hydroxyhexyl, (meth) ) 5-hydroxyheptyl acrylate, 5-hydroxyoctyl (meth) acrylate, 5-hydroxynonyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 6-hydroxyheptyl (meth) acrylate, (meta ) 6-hydroxyoctyl acrylate, (meta 6-hydroxynonyl acrylate, 6-hydroxydecyl (meth) acrylate, 7-hydroxyheptyl (meth) acrylate, 7-hydroxyoctyl (meth) acrylate, 7-hydroxynonyl (meth) acrylate, (meth) 7-hydroxydecyl acrylate, 7-hydroxyundecyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 8-hydroxynonyl (meth) acrylate, 8-hydroxydecyl (meth) acrylate, (meta ) 8-hydroxyundecyl acrylate, 8-hydroxydodecyl (meth) acrylate, 9-hydroxynonyl (meth) acrylate, 9-hydroxydecyl (meth) acrylate, 9-hydroxyundecyl (meth) acrylate, 9-hydroxydodecyl (meth) acrylate, (meth) acrylic 9-hydroxytridecyl silylate, 10-hydroxydecyl (meth) acrylate, 10-hydroxyundecyl (meth) acrylate, 10-hydroxydodecyl (meth) acrylate, 10-hydroxytridecyl acrylate, (meth) 10-hydroxytetradecyl acrylate, 11-hydroxyundecyl (meth) acrylate, 11-hydroxydodecyl (meth) acrylate, 11-hydroxytridecyl (meth) acrylate, 11-hydroxytetradecyl (meth) acrylate , (Meth) acrylic acid 11-hydroxypentadecyl, (meth) acrylic acid 12-hydroxydodecyl, (meth) acrylic acid 12-hydroxytridecyl, (meth) acrylic acid 12-hydroxytetradecyl, (meth) acrylic acid 13 -Hydroxypentadecyl (Meth) acrylic acid 13-hydroxytetradecyl, (meth) acrylic acid 13-hydroxypentadecyl, (meth) acrylic acid 14-hydroxytetradecyl, (meth) acrylic acid 14-hydroxypentadecyl, (meth) acrylic acid 15 A monomer having a hydroxy group such as hydroxypentadecyl, 15-hydroxyheptadecyl (meth) acrylate;
Monomers having a carboxyl group such as (meth) acrylic acid, carboxyalkyl (meth) acrylate (for example, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate), maleic acid, maleic anhydride, fumaric acid, crotonic acid, etc. body;
Acryloylmorpholine, vinylcaprolactam, N-vinyl-2-pyrrolidone, vinylpyridine, tetrahydrofurfuryl (meth) acrylate, caprolactone-modified tetrahydrofurfuryl acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, glycidyl (meth) acrylate, A monomer having a heterocyclic group such as 2,5-dihydrofuran;
Examples thereof include monomers having a substituted or unsubstituted amino group such as aminoethyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, and dimethylaminopropyl (meth) acrylate.
Of these, from the viewpoint of the reactivity between the (meth) acrylic acid ester polymer and the crosslinking agent, a monomer having a hydroxy group or a monomer having a carboxyl group is preferred, and a monomer having a hydroxy group and a carboxyl group are preferred. More preferably, any of the monomers having a group is included.

As the monomer having a hydroxy group, 2-hydroxyethyl acrylate, 3-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 5-hydroxypentyl acrylate, and 6-hydroxyhexyl acrylate are preferable. In particular, good durability can be obtained by using 2-hydroxyethyl acrylate, 4-hydroxybutyl acrylate, and 5-hydroxypentyl acrylate.
As the monomer having a carboxyl group, it is preferable to use acrylic acid.

  From the viewpoint of preventing an increase in peelability of a separate film that can be laminated on the outer surface of the pressure-sensitive adhesive layer, the (meth) acrylic resin (A) substantially includes a structural unit derived from a monomer having an amino group. Preferably not. Here, “substantially free” means that it is 0.1 part by mass or less in 100 parts by mass of all the structural units constituting the (meth) acrylic resin (A).

  The content of the structural unit derived from the monomer having a polar functional group is preferably 20 parts by mass or less, more preferably 0 with respect to 100 parts by mass of all structural units of the (meth) acrylic resin (A). 0.5 parts by mass or more and 15 parts by mass or less, more preferably 0.5 parts by mass or more and 10 parts by mass or less, and particularly preferably 1 part by mass or more and 7 parts by mass or less.

  The content of the structural unit derived from the monomer having an aromatic group is preferably 20 parts by mass or less, more preferably 4 parts by mass with respect to 100 parts by mass of all structural units of the (meth) acrylic resin (A). Part to 20 parts by mass, more preferably 4 parts to 16 parts by mass.

  As structural units derived from monomers other than (meth) acrylic acid esters, structural units derived from styrene monomers, structural units derived from vinyl monomers, and a plurality of (meth) acryloyl groups in the molecule Examples thereof include a structural unit derived from a monomer having a group and a structural unit derived from a (meth) acrylamide monomer.

  Examples of styrenic monomers include styrene; alkyl styrene such as methyl styrene, dimethyl styrene, trimethyl styrene, ethyl styrene, diethyl styrene, triethyl styrene, propyl styrene, butyl styrene, hexyl styrene, heptyl styrene, octyl styrene; fluorostyrene, Halogenated styrene such as chlorostyrene, bromostyrene, dibromostyrene, iodostyrene; nitrostyrene; acetylstyrene; methoxystyrene; and divinylbenzene.

  Examples of vinyl monomers include: vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, vinyl laurate, etc .; vinyl halides such as vinyl chloride and vinyl bromide; vinylidene chloride, etc. Examples thereof include vinylidene halides; nitrogen-containing heteroaromatic vinyls such as vinylpyridine, vinylpyrrolidone and vinylcarbazole; conjugated dienes such as butadiene, isoprene and chloroprene; and unsaturated nitriles such as acrylonitrile and methacrylonitrile.

  As monomers having a plurality of (meth) acryloyl groups in the molecule, 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, 1,9-nonanediol di ( Two (meth) acryloyl groups in the molecule such as (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate A monomer having three (meth) acryloyl groups in the molecule such as trimethylolpropane tri (meth) acrylate.

  (Meth) acrylamide monomers include N-methylol (meth) acrylamide, N- (2-hydroxyethyl) (meth) acrylamide, N- (3-hydroxypropyl) (meth) acrylamide, N- (4- Hydroxybutyl) (meth) acrylamide, N- (5-hydroxypentyl) (meth) acrylamide, N- (6-hydroxyhexyl) (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl ( (Meth) acrylamide, N-isopropyl (meth) acrylamide, N- (3-dimethylaminopropyl) (meth) acrylamide, N- (1,1-dimethyl-3-oxobutyl) (meth) acrylamide, N- [2- ( 2-oxo-1-imidazolidinyl) ethyl] (meth) acrylamide, -Acryloylamino-2-methyl-1-propanesulfonic acid, N- (methoxymethyl) acrylamide, N- (ethoxymethyl) (meth) acrylamide, N- (propoxymethyl) (meth) acrylamide, N- (1-methyl) Ethoxymethyl) (meth) acrylamide, N- (1-methylpropoxymethyl) (meth) acrylamide, N- (2-methylpropoxymethyl) (meth) acrylamide, N- (butoxymethyl) (meth) acrylamide, N- ( 1,1-dimethylethoxymethyl) (meth) acrylamide, N- (2-methoxyethyl) (meth) acrylamide, N- (2-ethoxyethyl) (meth) acrylamide, N- (2-propoxyethyl) (meth) Acrylamide, N- [2- (1-methylethoxy) ethyl] ( T) acrylamide, N- [2- (1-methylpropoxy) ethyl] (meth) acrylamide, N- [2- (2-methylpropoxy) ethyl] (meth) acrylamide, N- (2-butoxyethyl) (meth) ) Acrylamide, N- [2- (1,1-dimethylethoxy) ethyl] (meth) acrylamide, and the like. Of these, N- (methoxymethyl) acrylamide, N- (ethoxymethyl) acrylamide, N- (propoxymethyl) acrylamide, N- (butoxymethyl) acrylamide and N- (2-methylpropoxymethyl) acrylamide are preferable.

  The weight average molecular weight (Mw) of the (meth) acrylic resin (A) is preferably 500,000 to 2.5 million. When the weight average molecular weight is 500,000 or more, the durability of the pressure-sensitive adhesive layer in a high-temperature environment is improved, and there are problems such as lifting and peeling between the adherend and the pressure-sensitive adhesive layer and cohesive failure of the pressure-sensitive adhesive layer. Easy to suppress. When the weight average molecular weight is 2.5 million or less, it is advantageous from the viewpoint of coating properties when the pressure-sensitive adhesive composition is processed into a sheet (for example, coated on a substrate). From the viewpoint of achieving both durability of the pressure-sensitive adhesive layer and coating property of the pressure-sensitive adhesive composition, the weight average molecular weight is preferably 600,000 to 1,800,000, more preferably 700,000 to 1,700,000, and particularly preferably 100. 10 to 1.6 million. The molecular weight distribution (Mw / Mn) represented by the ratio of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is usually 2 to 10, preferably 3 to 8, and more preferably 3 to 6. . The weight average molecular weight can be analyzed by gel permeation chromatography and is a value in terms of standard polystyrene.

  When the (meth) acrylic resin (A) is dissolved in ethyl acetate to form a solution having a concentration of 20% by mass, the viscosity at 25 ° C. is preferably 20 Pa · s or less, preferably 0.1 to 15 Pa · s. It is more preferable that When the viscosity is within this range, it is advantageous from the viewpoint of coatability when the pressure-sensitive adhesive composition is applied to a substrate. The viscosity can be measured with a Brookfield viscometer.

  The glass transition temperature (Tg) of the (meth) acrylic resin (A) is, for example, −60 to 20 ° C., preferably −50 to 15 ° C., more preferably −45 to 10 ° C., particularly −40 to 0 ° C. May be. When Tg is less than or equal to the upper limit, it is advantageous for improving the wettability of the pressure-sensitive adhesive layer with respect to the adherend substrate, and when Tg is more than the lower limit, it is advantageous for improving the durability of the pressure-sensitive adhesive layer. The glass transition temperature can be measured with a differential scanning calorimeter (DSC).

  The (meth) acrylic resin (A) can be produced by a known method such as a solution polymerization method, a bulk polymerization method, a suspension polymerization method, or an emulsion polymerization method, and the solution polymerization method is particularly preferable. As the solution polymerization method, for example, a monomer and an organic solvent are mixed, a thermal polymerization initiator is added in a nitrogen atmosphere, and the temperature is 40 to 90 ° C., preferably about 50 to 80 ° C. A method of stirring for about an hour can be mentioned. In order to control the reaction, a monomer or a thermal polymerization initiator may be added continuously or intermittently during the polymerization. The monomer or thermal initiator may be added to an organic solvent.

  As the polymerization initiator, a thermal polymerization initiator, a photopolymerization initiator, or the like is used. Examples of the photopolymerization initiator include 4- (2-hydroxyethoxy) phenyl (2-hydroxy-2-propyl) ketone. As thermal polymerization initiators, 2,2′-azobisisobutyronitrile, 2,2′-azobis (2-methylbutyronitrile), 1,1′-azobis (cyclohexane-1-carbonitrile), 2 , 2′-azobis (2,4-dimethylvaleronitrile), 2,2′-azobis (2,4-dimethyl-4-methoxyvaleronitrile), dimethyl-2,2′-azobis (2-methylpropionate) ), 2,2′-azobis (2-hydroxymethylpropionitrile) and other azo compounds; lauryl peroxide, t-butyl hydroperoxide, benzoyl peroxide, t-butyl peroxybenzoate, cumene hydroperoxide, Diisopropyl peroxydicarbonate, dipropyl peroxydicarbonate, t-butyl peroxyneode Organic peroxides such as noate, t-butyl peroxypivalate and (3,5,5-trimethylhexanoyl) peroxide; inorganic peroxides such as potassium persulfate, ammonium persulfate and hydrogen peroxide . Moreover, the redox initiator etc. which used the peroxide and the reducing agent together can also be used.

  The ratio of a polymerization initiator is about 0.001-5 mass parts with respect to 100 mass parts of total amounts of the monomer which comprises (meth) acrylic-type resin. For the polymerization of the (meth) acrylic resin, a polymerization method using active energy rays (for example, ultraviolet rays) may be used.

  Examples of organic solvents include aromatic hydrocarbons such as toluene and xylene; esters such as ethyl acetate and butyl acetate; aliphatic alcohols such as propyl alcohol and isopropyl alcohol; ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone. Is mentioned.

  Content of (meth) acrylic-type resin (A) is 60 mass%-99.9 mass% normally in 100 mass% of adhesive compositions, Preferably it is 70 mass%-99.5 mass%, More preferably, it is 80 mass%-99 mass%.

  The pressure-sensitive adhesive composition can contain a crosslinking agent (B). The crosslinking agent (B) reacts with a polar functional group (for example, a hydroxy group, an amino group, a carboxyl group, a heterocyclic group, etc.) in the (meth) acrylic resin (A). The crosslinking agent (B) forms a crosslinked structure with the (meth) acrylic resin (A) or the like, and forms a crosslinked structure advantageous for durability and reworkability.

  Examples of the crosslinking agent (B) include isocyanate-based crosslinking agents, epoxy-based crosslinking agents, aziridine-based crosslinking agents, metal chelate-based crosslinking agents, and the like. In particular, pot life of the pressure-sensitive adhesive composition and durability of the pressure-sensitive adhesive layer, cross-linking From the viewpoint of speed and the like, an isocyanate-based crosslinking agent is preferable.

  As the isocyanate compound, a compound having at least two isocyanato groups (—NCO) in the molecule is preferable. For example, an aliphatic isocyanate compound (for example, hexamethylene diisocyanate), an alicyclic isocyanate compound (for example, isophorone diisocyanate). , Hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene diisocyanate), aromatic isocyanate compounds (for example, tolylene diisocyanate, xylylene diisocyanate diphenylmethane diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate, etc.). The crosslinking agent (B) is an adduct (adduct) of the isocyanate compound with a polyhydric alcohol compound [for example, an adduct with glycerol, trimethylolpropane or the like], an isocyanurate, a burette type compound, a polyether polyol, or a polyester. It may be a derivative such as a urethane prepolymer type isocyanate compound obtained by addition reaction with a polyol, an acrylic polyol, a polybutadiene polyol, a polyisoprene polyol or the like. A crosslinking agent (B) can be used individually or in combination of 2 or more types. Of these, typically, aromatic isocyanate compounds (for example, tolylene diisocyanate, xylylene diisocyanate), aliphatic isocyanate compounds (for example, hexamethylene diisocyanate) or their polyhydric alcohol compounds (for example, glycerol, trimethylolpropane). ) Or isocyanurate. If the crosslinking agent (B) is an adduct of an aromatic isocyanate compound and / or a polyhydric alcohol compound thereof, or an isocyanurate, it is advantageous for forming an optimal crosslinking density (or crosslinked structure). The durability of the pressure-sensitive adhesive layer can be improved. In particular, when it is an adduct of a tolylene diisocyanate compound and / or these polyhydric alcohol compounds, durability can be improved even when, for example, an adhesive layer is applied to a polarizing plate.

  Content of a crosslinking agent (B) is 0.01-15 mass parts normally with respect to 100 mass parts of resin (A) (preferably (meth) acrylic-type resin (A)), Preferably it is 0.05. It is 10 mass parts, More preferably, it is 0.1-5 mass parts.

Examples of the silane compound (D) include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3 -Glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylethoxydimethylsilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, Examples include 3-methacryloyloxypropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane.
The silane compound (D) may be a silicone oligomer. A specific example of the silicone oligomer is expressed in the form of a combination of monomers as follows.

  3-mercaptopropyltrimethoxysilane-tetramethoxysilane oligomer, 3-mercaptopropyltrimethoxysilane-tetraethoxysilane oligomer, 3-mercaptopropyltriethoxysilane-tetramethoxysilane oligomer, 3-mercaptopropyltriethoxysilane-tetraethoxysilane Mercaptopropyl group-containing oligomers such as oligomers; mercaptomethyltrimethoxysilane-tetramethoxysilane oligomers, mercaptomethyltrimethoxysilane-tetraethoxysilane oligomers, mercaptomethyltriethoxysilane-tetramethoxysilane oligomers, mercaptomethyltriethoxysilane-tetraethoxy Mercaptomethyl group-containing oligomers such as silane oligomers; 3-glycidoxypropyl Limethoxysilane-tetramethoxysilane copolymer, 3-glycidoxypropyltrimethoxysilane-tetraethoxysilane copolymer, 3-glycidoxypropyltriethoxysilane-tetramethoxysilane copolymer, 3-glycidoxypropyltriethoxysilane-tetra Ethoxysilane copolymer, 3-glycidoxypropylmethyldimethoxysilane-tetramethoxysilane copolymer, 3-glycidoxypropylmethyldimethoxysilane-tetraethoxysilane copolymer, 3-glycidoxypropylmethyldiethoxysilane-tetramethoxysilane copolymer, 3-glycidoxypropyl group-containing copolymers such as 3-glycidoxypropylmethyldiethoxysilane-tetraethoxysilane copolymer; Cypropyltrimethoxysilane-tetramethoxysilane oligomer, 3-methacryloyloxypropyltrimethoxysilane-tetraethoxysilane oligomer, 3-methacryloyloxypropyltriethoxysilane-tetramethoxysilane oligomer, 3-methacryloyloxypropyltriethoxysilane-tetraethoxy Silane oligomer, 3-methacryloyloxypropylmethyldimethoxysilane-tetramethoxysilane oligomer, 3-methacryloyloxypropylmethyldimethoxysilane-tetraethoxysilane oligomer, 3-methacryloyloxypropylmethyldiethoxysilane-tetramethoxysilane oligomer, 3-methacryloyloxy Propylmethyldiethoxysilane-tetraethoxysilane oligomer, etc. Methacryloyloxypropyl group-containing oligomers of: 3-acryloyloxypropyltrimethoxysilane-tetramethoxysilane oligomer, 3-acryloyloxypropyltrimethoxysilane-tetraethoxysilane oligomer, 3-acryloyloxypropyltriethoxysilane-tetramethoxysilane oligomer, 3-acryloyloxypropyltriethoxysilane-tetraethoxysilane oligomer, 3-acryloyloxypropylmethyldimethoxysilane-tetramethoxysilane oligomer, 3-acryloyloxypropylmethyldimethoxysilane-tetraethoxysilane oligomer, 3-acryloyloxypropylmethyldiethoxy Silane-tetramethoxysilane oligomer, 3-acryloyloxypropylme Acrylyloxypropyl group-containing oligomer such as rudiethoxysilane-tetraethoxysilane oligomer; vinyltrimethoxysilane-tetramethoxysilane oligomer, vinyltrimethoxysilane-tetraethoxysilane oligomer, vinyltriethoxysilane-tetramethoxysilane oligomer, vinyltriethoxy Silane-tetraethoxysilane oligomer, vinylmethyldimethoxysilane-tetramethoxysilane oligomer, vinylmethyldimethoxysilane-tetraethoxysilane oligomer, vinylmethyldiethoxysilane-tetramethoxysilane oligomer, vinylmethyldiethoxysilane-tetraethoxysilane oligomer, etc. Vinyl group-containing oligomer; 3-aminopropyltrimethoxysilane-tetramethoxysilane Limer, 3-aminopropyltrimethoxysilane-tetraethoxysilane copolymer, 3-aminopropyltriethoxysilane-tetramethoxysilane copolymer, 3-aminopropyltriethoxysilane-tetraethoxysilane copolymer, 3-aminopropylmethyldimethoxysilane-tetra Amino group-containing compounds such as methoxysilane copolymer, 3-aminopropylmethyldimethoxysilane-tetraethoxysilane copolymer, 3-aminopropylmethyldiethoxysilane-tetramethoxysilane copolymer, 3-aminopropylmethyldiethoxysilane-tetraethoxysilane copolymer, etc. Copolymer etc.

  The silane compound (D) may be a silane compound represented by the following formula (d1). When the pressure-sensitive adhesive composition contains a silane compound represented by the following formula (d1), the adhesiveness (or adhesiveness) can be further improved, so that a pressure-sensitive adhesive layer having good peeling resistance can be formed. In particular, even when the pressure-sensitive adhesive layer is applied (or laminated) to a transparent electrode or glass in a high temperature environment, adhesion (or adhesiveness) can be maintained and high durability can be exhibited.

（式中、Ｂは、炭素数１〜２０のアルカンジイル基又は炭素数３〜２０の二価の脂環式炭化水素基を示し、前記アルカンジイル基及びＲ前記脂環式炭化水素基を構成する−ＣＨ_２−は、−Ｏ−又は−ＣＯ−に置換されてもよく、Ｒ^７は炭素数１〜５のアルキル基を示し、Ｒ^ｄ８、Ｒ^ｄ９、Ｒ^ｄ10、Ｒ^ｄ11及びＲ^ｄ12はそれぞれ独立して、炭素数１〜５のアルキル基又は炭素数１〜５のアルコキシ基を示す）

(In the formula, B represents an alkanediyl group having 1 to 20 carbon atoms or a divalent alicyclic hydrocarbon group having 3 to 20 carbon atoms, and constitutes the alkanediyl group and R the alicyclic hydrocarbon group. —CH ₂ — may be substituted with —O— or —CO—, R ⁷ represents an alkyl group having 1 to 5 carbon atoms, and R ^d8 , R ^d9 , R ^d10 , R ^d11 and R ^d12 represent Each independently represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms)

In the formula (d1), B represents an alkanediyl group having 1 to 20 carbon atoms such as a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, a hexamethylene group, a heptamethylene group, an octamethylene group; a cyclobutylene group (for example, 1,2-cyclobutylene group), cyclopentylene group (for example, 1,2-cyclopentylene group), cyclohexylene group (for example, 1,2-cyclohexylene group), cyclooctylene group (for example, 1,2- A divalent alicyclic hydrocarbon group having 3 to 20 carbon atoms such as a cyclooctylene group), or -CH2- constituting these alkanediyl groups and the alicyclic hydrocarbon group is -O- or- The group substituted by CO- is shown. Preferred B is an alkanediyl group having 1 to 10 carbon atoms. R ^d7 represents an alkyl group having 1 to 5 carbon atoms such as a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, an s-butyl group, a t-butyl group, or a pentyl group, and R ^d8 , R ^d9 , R ^d10 , ^Rd11 and ^Rd12 are each independently an alkyl group having 1 to 5 carbon atoms exemplified for ^Rd7 , or a methoxy group, an ethoxy group, a propoxy group, an i-propoxy group, a butoxy group or an s-butoxy group. And an alkoxy group having 1 to 5 carbon atoms such as a t-butoxy group. Preferred R ^d8 , R ^d9 , R ^d10 , R ^d11 and R ^d12 are each independently an alkoxy group having 1 to 5 carbon atoms. These silane compounds (D) can be used alone or in combination of two or more.

  Specific examples of the silane compound represented by the formula (d1) include (trimethoxysilyl) methane, 1,2-bis (trimethoxysilyl) ethane, 1,2-bis (triethoxysilyl) ethane, 1,3-bis (trimethoxysilyl) propane, 1,3-bis (triethoxysilyl) propane, 1,4-bis (trimethoxysilyl) butane, 1,4-bis (triethoxysilyl) butane, 1, 5-bis (trimethoxysilyl) pentane, 1,5-bis (triethoxysilyl) pentane, 1,6-bis (trimethoxysilyl) hexane, 1,6-bis (triethoxysilyl) hexane, 1,6- Bis (tripropoxysilyl) hexane, 1,8-bis (trimethoxysilyl) octane, 1,8-bis (triethoxysilyl) octane, 1,8- Bis (triC1-5alkoxysilyl) C1-10alkanes such as su (tripropoxysilyl) octane; bis (dimethoxymethylsilyl) methane, 1,2-bis (dimethoxymethylsilyl) ethane, 1,2-bis (dimethoxy) Ethylsilyl) ethane, 1,4-bis (dimethoxymethylsilyl) butane, 1,4-bis (dimethoxyethylsilyl) butane, 1,6-bis (dimethoxymethylsilyl) hexane, 1,6-bis (dimethoxyethylsilyl) ) Bis (diC1-5alkoxyC1-5alkylsilyl) C1-10alkanes such as hexane, 1,8-bis (dimethoxymethylsilyl) octane, 1,8-bis (dimethoxyethylsilyl) octane; Bis (methoxydimethylsilyl) hexane, 1,8-bis (methoxydimethylsilane) Le) bis octane (mono C1-5 alkoxy - di C1-5 alkylsilyl) such as C1-10 alkanes. Of these, 1,2-bis (trimethoxysilyl) ethane, 1,3-bis (trimethoxysilyl) propane, 1,4-bis (trimethoxysilyl) butane, 1,5-bis (trimethoxysilyl) Bis (triC1-3alkoxysilyl) C1-10alkanes such as pentane, 1,6-bis (trimethoxysilyl) hexane, 1,8-bis (trimethoxysilyl) octane are preferred, and in particular, 1,6-bis (Trimethoxysilyl) hexane and 1,8-bis (trimethoxysilyl) octane are preferred.

  Content of a silane compound (D) is 0.01-10 mass parts normally with respect to 100 mass parts of resin (A) (preferably (meth) acrylic-type resin (A)), Preferably it is 0.03. It is -5 mass parts, More preferably, it is 0.05-2 mass parts, More preferably, it is 0.1-1 mass part. It is advantageous for suppression of bleed-out of the silane compound (D) from the pressure-sensitive adhesive layer if it is not more than the above upper limit value, and adhesion between the pressure-sensitive adhesive layer and a metal layer, a glass substrate or the like if it is not less than the above lower limit value. It is easy to improve the property (or adhesiveness), which is advantageous for improving the peel resistance.

The pressure-sensitive adhesive composition may further contain an antistatic agent.
Examples of the antistatic agent include surfactants, siloxane compounds, conductive polymers, ionic compounds, and the like, and ionic compounds are preferable. Examples of the ionic compound include conventional ones. Examples of the cation component constituting the ionic compound include organic cations and inorganic cations. Examples of the organic cation include a pyridinium cation, a pyrrolidinium cation, a piperidinium cation, an imidazolium cation, an ammonium cation, a sulfonium cation, and a phosphonium cation. Examples of the inorganic cation include alkali metal cations such as lithium cation, potassium cation, sodium cation and cesium cation, and alkaline earth metal cations such as magnesium cation and calcium cation. In particular, a pyridinium cation, an imidazolium cation, a pyrrolidinium cation, a lithium cation, and a potassium cation are preferable from the viewpoint of compatibility with a (meth) acrylic resin. The anionic component constituting the ionic compound may be either an inorganic anion or an organic anion, but an anionic component containing a fluorine atom is preferred in terms of antistatic performance. Examples of the anion component containing a fluorine atom include hexafluorophosphate anion (PF _6- ), bis (trifluoromethanesulfonyl) imide anion [(CF ₃ SO ₂ ) ₂ N-], bis (fluorosulfonyl) imide anion [(FSO ₂ ) ₂ N-], tetra (pentafluorophenyl) borate anion [(C ₆ F ₅ ) ₄ B-] and the like. These ionic compounds can be used alone or in combination of two or more. In particular, bis (trifluoromethanesulfonyl) imide anion [(CF ₃ SO ₂ ) ₂ N—], bis (fluorosulfonyl) imide anion [(FSO ₂ ) ₂ N—], tetra (pentafluorophenyl) borate anion [(C ₆ F _{5) 4} B-] is preferred.
From the viewpoint of the temporal stability of the antistatic performance of the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition, an ionic compound that is solid at room temperature is preferable.

  Content of an antistatic agent is 0.01-20 mass parts with respect to 100 mass parts of resin (A) (preferably (meth) acrylic-type resin (A)), Preferably it is 0.1-10 mass. Part, more preferably 1 to 7 mass.

  The pressure-sensitive adhesive composition may contain one or more additives such as a solvent, a crosslinking catalyst, a tackifier, a plasticizer, a softener, a pigment, a rust inhibitor, an inorganic filler, and light scattering fine particles.

  The optical film of the present invention may have two or more light selective absorption layers. When it has two or more types of light selective absorption layers, it is preferable that at least one is an adhesive layer having a light selective absorption function.

<Oxygen shielding layer>
The oxygen shielding layer satisfies the above formula (2).
The thickness of the oxygen shielding layer is usually 0.1 μm to 500 μm, preferably 1 μm to 200 μm, more preferably 5 μm to 100 μm, and particularly preferably 5 μm to 50 μm.
The optical film of the present invention may have two or more oxygen shielding layers. When it has 2 or more types of oxygen shielding layers, the total thickness is 0.2 micrometers-500 micrometers normally, Preferably it is 1 micrometer-200 micrometers. Moreover, when it has 2 or more types of oxygen shielding layers, the sum total of 2 or more types of oxygen shielding layers should just satisfy | fill said Formula (2), and each oxygen shielding layer is a layer which satisfy | fills said Formula (2). Is preferred.

  The oxygen shielding layer is formed of at least one resin selected from polyester resin (E), polyvinyl alcohol resin (F), polyamide resin (G), polyimide resin (H), and cellulose resin (I). It is preferable that it is a resin layer.

The polyester resin (E) is a polymer resin having an ester bond repeating unit in the main chain, and is generally obtained by condensation polymerization of a polyvalent carboxylic acid or a derivative thereof and a polyhydric alcohol or a derivative thereof.
Examples of polyvalent carboxylic acids or derivatives thereof that give polyester include terephthalic acid, isophthalic acid, phthalic acid, 2,6-naphthalenedicarboxylic acid, diphenyldicarboxylic acid, diphenylsulfonedicarboxylic acid, diphenoxyethanedicarboxylic acid, and 5-sodiumsulfonedicarboxylic acid. Aromatic dicarboxylic acids such as acids, oxalic acid, succinic acid, adipic acid, sebacic acid, dimer acid, maleic acid, fumaric acid and other aliphatic dicarboxylic acids, 1,4-cyclohexanedicarboxylic acid and other alicyclic dicarboxylic acids, Mention may be made of oxycarboxylic acids such as paraoxybenzoic acid and their derivatives. Examples of dicarboxylic acid derivatives include dimethyl terephthalate, diethyl terephthalate, 2-hydroxyethyl methyl terephthalate, dimethyl 2,6-naphthalenedicarboxylate, dimethyl isophthalate, dimethyl adipate, diethyl maleate, and dimethyl dimer. An esterified product can be mentioned. Among these, terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, and esterified products thereof are preferably used from the viewpoint of moldability and handleability.
Examples of polyhydric alcohols or derivatives thereof that give polyester include ethylene glycol, diethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, and 1,5-pentane. Diol, 1,6-hexanediol, aliphatic dihydroxy compounds such as neopentyl glycol, diethylene glycol, polyethylene glycol, polypropylene glycol, polyoxyalkylene glycol such as polytetramethylene glycol, 1,4-cyclohexanedimethanol, spiroglycol, etc. Examples thereof include alicyclic dihydroxy compounds, aromatic dihydroxy compounds such as bisphenol A and bisphenol S, and derivatives thereof. Among these, ethylene glycol, diethylene glycol, 1,3-propanediol, 1,4-butanediol, neopentyl glycol, and 1,4-cyclohexanedimethanol are preferably used in terms of moldability and handling properties.
Examples of the polyester resin include polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polybutylene naphthalate, polytrimethylene terephthalate, polytrimethylene naphthalate, polycyclohexanedimethyl terephthalate, and polycyclohexanedimethyl naphthalate. Of these, polyethylene terephthalate or polyethylene naphthalate is preferred.

The polyvinyl alcohol resin (F) can be obtained by saponifying a polyvinyl acetate resin. For example, polyvinyl acetate which is a homopolymer of vinyl acetate, a monomer copolymerizable with vinyl acetate ( Examples thereof include a copolymer of unsaturated carboxylic acid, olefin, vinyl ether, unsaturated sulfonic acid, (meth) acrylamide having an ammonium group) and vinyl acetate.
The saponification degree of the polyvinyl alcohol resin (F) is preferably 85 to 100 mol%, and more preferably 98 mol% or more. The polyvinyl alcohol-based resin (F) may be modified, for example, polyvinyl formal or polyvinyl acetal modified with aldehydes. The average degree of polymerization of the polyvinyl alcohol resin is usually 1000 to 10000, preferably 1500 to 5000. The average degree of polymerization of the polyvinyl alcohol resin can be determined according to JIS K 6726.

The polyamide-based resin (G) is a polymer resin containing an amide bond in the repeating unit as a main chain. For example, an aromatic polyamide (aramid) having an aromatic ring skeleton bonded by an amide bond or an aliphatic skeleton bonded by an amide bond. Aliphatic polyamides and the like. Generally, it can be obtained by a polymerization reaction of a polyvalent carboxylic acid or a derivative thereof and a polyvalent amine.
Examples of polyvalent carboxylic acids or derivatives thereof that give polyamide include terephthalic acid chloride, 2-chloro-terephthalic acid chloride, isophthalic acid dichloride, naphthalene dicarbonyl chloride, biphenyl dicarbonyl chloride, terphenyl dicarbonyl chloride, and the like.
Examples of polyvalent amines that give polyamide include 4,4′-diaminodiphenyl ether, 3,4′-diaminodiphenyl ether, 4,4′-diaminodiphenyl sulfone, 3,3′-diaminodiphenyl sulfone, and 2,2′-ditrile. Fluoromethyl-4,4′-diaminobiphenyl, 9,9-bis (4-aminophenyl) fluorene, 9,9-bis (4-amino-3-methylphenyl) fluorene, bis [4- (4-aminophenoxy) ) Phenyl] sulfone, bis [4- (3-aminophenoxy) phenyl] sulfone, 2,2-bis [4- (4-aminophenoxy) phenyl] propane, 2,2-bis (4-aminophenyl) hexafluoro Propane and the like can be mentioned, but preferably 4,4′-diaminodiphenyl sulfone, 3,3′-diaminodi Phenylsulfone, 2,2′-ditrifluoromethyl-4,4′-diaminobiphenyl, 9,9-bis (4-aminophenyl) fluorene, 9,9-bis (4-amino-3-methylphenyl) fluorene, Examples include 1,4-cyclohexanediamine and 1,4-norbornenediamine.

  The polyimide resin (H) is a resin containing an imide bond in a repeating unit, and is generally a condensation type polyimide obtained by polycondensation using diamines and tetracarboxylic dianhydride as starting materials. As the diamine, aromatic diamines, alicyclic diamines, aliphatic diamines and the like can be used. As tetracarboxylic dianhydride, aromatic tetracarboxylic dianhydride, alicyclic tetracarboxylic dianhydride, acyclic aliphatic tetracarboxylic dianhydride and the like can be used. Each of the diamines and tetracarboxylic dianhydrides may be used alone or in combination of two or more. Instead of tetracarboxylic dianhydride, a tetracarboxylic acid compound selected from tetracarboxylic acid compound analogs such as an acid chloride compound may be used as a starting material.

The cellulose resin (I) is preferably a cellulose ester resin, that is, a resin in which at least a part of hydroxyl groups in cellulose is acetated, partly acetated, and partly other acid. It may be a mixed ester esterified with. The cellulose ester resin is preferably an acetyl cellulose resin. Specific examples of the acetyl cellulose resin include triacetyl cellulose, diacetyl cellulose, cellulose acetate propionate, and cellulose acetate butyrate.
As the raw material cotton of acetylcellulose, cellulose raw materials such as wood pulp and cotton linter known by the Japan Society of Invention and Innovation can be used. Acetylcellulose can be synthesized by the method described in Wood Chemistry, 180-190 (Kyoritsu Shuppan, Mita et al., 1968).

These resins may further contain a solvent, a plasticizer, an organic acid, a dye, an antistatic agent, a surfactant, a lubricant, a flame retardant, a filler, rubber particles, and a phase difference adjusting agent.
The oxygen shielding layer is preferably a film that can be formed from these resins using a known molding method. Molding methods include compression molding, transfer molding, injection molding, extrusion molding, blow molding, powder molding, FRP molding, cast coating (for example, casting), calendar molding, heat Examples include a pressing method.

The oxygen shielding layer is preferably a layer formed of at least one resin selected from polyester resin (E), polyvinyl alcohol resin (F), and polyimide resin (H). More preferably, the polarizing film is formed.
The polarizing film is a film having a property of absorbing linearly polarized light having a vibration surface parallel to the absorption axis and transmitting linearly polarized light having a vibration surface orthogonal to the absorption axis (parallel to the transmission axis). A film in which a dichroic dye is adsorbed and oriented on a polyvinyl alcohol resin film can be used. Examples of the dichroic dye include iodine and dichroic organic dyes.

  The polyvinyl alcohol-based resin can be obtained by saponifying a polyvinyl acetate-based resin. Examples of the polyvinyl acetate resin include polyvinyl acetate which is a homopolymer of vinyl acetate, and a monomer copolymerizable with vinyl acetate (for example, unsaturated carboxylic acid, olefin, vinyl ether, unsaturated sulfonic acid, ammonium group). (Meth) acrylamide etc.) and vinyl acetate.

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

  Usually, what formed the polyvinyl alcohol-type resin into a film is used as a raw film of a polarizing film. A polyvinyl alcohol-type resin can be formed into a film by a well-known method. The thickness of the raw film is usually 1 to 150 μm, and preferably 10 μm or more in consideration of easiness of stretching.

  The polarizing film is, for example, a step of uniaxially stretching the original film, a step of dyeing the film with a dichroic dye and adsorbing the dichroic dye, a step of treating the film with an aqueous boric acid solution, and A step of washing the film with water is performed, and finally the film is dried to be manufactured. The thickness of the polarizer 2 is usually 1 to 30 μm, and is preferably 20 μm or less, more preferably 15 μm or less, and particularly preferably 10 μm or less from the viewpoint of thinning the optical film 1 with an adhesive layer.

  A polarizer 2 formed by adsorbing and orienting a dichroic dye on a polyvinyl alcohol-based resin film uses a single film of a polyvinyl alcohol-based resin film as a raw film, and the uniaxial stretching treatment and dichroic dye of this film are used. A substrate having a polyvinyl alcohol resin layer by applying a coating liquid (such as an aqueous solution) containing a polyvinyl alcohol resin to a substrate film, followed by drying, in addition to a method for performing a dyeing process (method (1)). After the film is obtained, this is uniaxially stretched for each base film, and the stretched polyvinyl alcohol resin layer is dyed with a dichroic dye, and then the base film is peeled and removed (method (method ( 2)). As the base film, a film made of a thermoplastic resin can be used. Preferably, a polyester resin such as polyethylene terephthalate, a polycarbonate resin, a cellulose resin such as triacetyl cellulose, and a cyclic polyolefin such as a norbornene resin. It is a film made of resin, polystyrene resin or the like. When the method (2) is used, a thin polarizing film can be easily produced. For example, a polarizing film having a thickness of 7 μm or less can be easily produced.

It is preferable that a protective film is provided on at least one surface of the polarizing film via an adhesive.
As the adhesive, a known adhesive is used, which may be an aqueous adhesive or an active energy ray-curable adhesive.

  As the water-based adhesive, a conventional water-based adhesive (for example, an adhesive comprising a polyvinyl alcohol resin aqueous solution, an aqueous two-component urethane emulsion adhesive, an aldehyde compound, an epoxy compound, a melamine compound, a methylol compound, an isocyanate compound, And crosslinking agents such as amine compounds and polyvalent metal salts). Among these, a water-based adhesive made of a polyvinyl alcohol-based resin aqueous solution can be suitably used. In addition, when using a water-system adhesive agent, after bonding a polarizing film and a protective film, it is preferable to implement the process dried to remove the water contained in a water-system adhesive agent. After the drying process, for example, a curing process for curing at a temperature of about 20 to 45 ° C. may be provided. The adhesive layer formed from a water-based adhesive is usually 0.001 to 5 μm.

  The active energy ray-curable adhesive refers to an adhesive that cures when irradiated with active energy rays such as ultraviolet rays and electron beams. For example, a curable composition containing a polymerizable compound and a photopolymerization initiator, light Examples thereof include a curable composition containing a reactive resin, a curable composition containing a binder resin and a photoreactive cross-linking agent, and preferably an ultraviolet curable adhesive.

  When using an active energy ray-curable adhesive, after bonding the polarizing film and the protective film, if necessary, a drying step is performed, and then the active energy ray-curable adhesive is irradiated by irradiating the active energy ray. A curing step for curing is performed. The light source of the active energy ray is not particularly limited, but ultraviolet light having a light emission distribution at a wavelength of 400 nm or less is preferable. The adhesive layer formed from an active energy ray-curable adhesive is usually 0.1 to 10 μm.

  Examples of the method for laminating the polarizing film and the protective film include a method for subjecting at least one of these laminating surfaces to surface activation treatment such as saponification treatment, corona treatment, plasma treatment, and the like. When a protective film is bonded to both surfaces of the polarizing film, the adhesive for bonding these resin films may be the same type of adhesive or a different type of adhesive.

The protective film is preferably a film formed from a light-transmitting thermoplastic resin. Specifically, a film made of a polyolefin resin; a cellulose resin; a polyester resin; a (meth) acrylic resin; or a mixture or copolymer thereof is fried. When protective films are provided on both sides of the polarizing film, the protective film used may be a film made of different thermoplastic resins or a film made of the same thermoplastic resin.
When a protective film is laminated | stacked on the at least one surface of a polarizing film, it is preferable that a protective film is a protective film which consists of polyolefin resin and a cellulose resin. By using these films, shrinkage of the polarizing film in a high temperature environment can be effectively suppressed without impairing the optical properties of the polarizing film. The protective film may also be an oxygen shielding layer.

A preferable configuration of the polarizing plate is a polarizing plate in which a protective film is laminated on at least one surface of the polarizing film via an adhesive layer. When a protective film is laminated | stacked only on one side of a polarizing film, it is more preferable to laminate | stack on the visual recognition side. The protective film laminated on the viewing side is preferably a protective film made of a triacetyl cellulose resin or a cycloolefin resin. The protective film may be an unstretched film, or may be stretched in any direction and have a phase difference. 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.
When the protective film is laminated on both sides of the polarizing film, the protective film on the panel side (opposite to the viewing side) is a protective film or retardation film made of a triacetyl cellulose resin, cycloolefin resin or acrylic resin. Preferably there is. The retardation film may be a zero retardation film described later.

The oxygen shielding layer may be a surface treatment layer formed on the resin layer. The surface treatment layer is preferably a hard coat layer having a hardness of H or higher in a pencil hardness test (load 4.9 N) according to JIS K5600-5-4 (1999), and a hard coat having a hardness of 3H or higher. More preferably, it is a layer. The surface treatment layer is generally laminated on the outermost surface of the optical film.
Examples of the hard coat layer include a layer formed from a thermosetting composition composition, and a layer formed from an active energy ray (preferably ultraviolet ray) curable resin composition. The hard coat layer is formed from an ultraviolet curable resin composition. It is preferable that it is a layer to be formed.
Examples of the ultraviolet curable resin composition include a compound containing a compound that cures by a radical polymerization reaction upon irradiation with ultraviolet rays, or a composition that contains a compound that cures by a cationic polymerization reaction upon irradiation with ultraviolet rays, and includes a radical polymerizable (meth) acrylic compound. It is preferable that it is a composition containing. Specifically, the composition described in JP 2002-265650 A can be mentioned.

<Optical laminate>
The cross-sectional schematic diagram of an example of a layer structure of the optical film of this invention and the optical laminated body containing the optical film of this invention was shown in FIGS.
The optical film of the present invention includes at least one light selective absorption layer and at least one oxygen shielding layer. In the optical film of the present invention, for example, as shown in FIG. 1, the light selective absorption layer 10 and the oxygen shielding layer 20 may be directly laminated, or between the light selective absorption layer 10 and the oxygen shielding layer 20. Other layers may be included.
An optical laminate 1A shown in FIG. 2 is an optical laminate in which a protective film 90, an adhesive layer 30a, an oxygen shielding layer 20, an adhesive layer 30a, a protective film 90, and a light selective absorption layer 10 are laminated. When the oxygen shielding layer 20 is a polarizing film formed from a polyvinyl alcohol-based resin film, “protective film 90, adhesive layer 30a, oxygen shielding layer 20, and protective film 90” in the optical laminate 1A shown in FIG. The laminated body laminated in this order also serves as the polarizing plate 100 that is one of the optical films 40. The protective film 90 may be a retardation film having a retardation, or an oxygen shielding layer.
The optical laminate 1B illustrated in FIG. 3 includes a protective film 90, an adhesive layer 30a, an oxygen shielding layer 20, an adhesive layer 30a, a protective film 90, a light selective absorption layer 10, an optical film 40, and an adhesive layer 30. An optical laminate in which the optical film 40 has a multilayer structure. The pressure-sensitive adhesive layer 30 can be bonded to, for example, other layers or a liquid crystal cell.
4 includes a protective film 90, an adhesive layer 30a, an oxygen shielding layer 20, an adhesive layer 30a, a protective film 90, a light selective absorption layer 10, an optical film 40, an adhesive layer 30, and light emission. This is an optical laminate in which the elements 110 (liquid crystal cell, OLED cell) are laminated.
The oxygen shielding layer is preferably located on the viewing side (the side opposite to the light emitting element) from the light selective absorption layer.

  The optical film 40 is a film having optical functions such as transmission, reflection, and absorption of light, and may be a single layer film or a multilayer film. Examples of the optical film 40 include a polarizing film, a retardation film, a brightness enhancement film, an antiglare film, an antireflection film, a diffusion film, a condensing film, a window film, and the like, and a polarizing film, a retardation film, a window film, or the like. These laminated films are preferable.

  A retardation film is an optical film exhibiting optical anisotropy, for example, polyvinyl alcohol, polycarbonate, polyester, polyarylate, polyimide, polyolefin, polycycloolefin, polystyrene, polysulfone, polyethersulfone, polyvinylidene fluoride. Examples thereof include a stretched film obtained by stretching a polymer film composed of ride / polymethyl methacrylate, acetylcellulose, saponified ethylene-vinyl acetate copolymer, polyvinyl chloride, etc. by about 1.01 to 6 times. Among these, a polymer film obtained by uniaxially stretching or biaxially stretching a polycarbonate film or a cycloolefin-based resin film is preferable. In the present specification, the retardation film includes a zero retardation film, and also includes a film called a uniaxial retardation film, a low photoelasticity retardation film, a wide viewing angle retardation film, or the like.

  As a film that exhibits optical anisotropy by applying and orienting a liquid crystalline compound, or a film that exhibits optical anisotropy by applying an inorganic layered compound, a film called a temperature-compensated retardation film, JX "NH film" (trade name; film with rod-like liquid crystal tilted and aligned) sold by Liquid Crystal Film Co., Ltd. "WV film" (trade name; disc-shaped liquid crystal with tilt-aligned orientation) sold by Fuji Film Co., Ltd. Film), “VAC film” (trade name: fully biaxially oriented film), “new VAC film” (trade name: biaxially oriented film) and the like sold by Sumitomo Chemical Co., Ltd.

The zero Letters retardation film, and the retardation R _th for the front retardation R _e and the thickness direction, both a -15～15Nm, refers to isotropic film optically. Examples of the zero retardation film include a resin film made of a cellulose resin, a polyolefin resin (a chain polyolefin resin, a polycycloolefin resin, etc.) or a polyethylene terephthalate resin, and the retardation value can be easily controlled and obtained. Cellulose resin or polyolefin resin is preferable because it is easy. The zero retardation film can also be used as a protective film. Zero retardation films are sold by Fuji Film Co., Ltd., “Z-TAC” (trade name), Konica Minolta Co., Ltd., “Zero Tac (registered trademark)”, sold by Nippon Zeon Co., Ltd. “ZF-14” (trade name).

  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 expressing optical anisotropy by coating and orientation of liquid crystalline compounds,
1st form: Retardation film in which the rod-like liquid crystal compound is oriented in the horizontal direction with respect to the support 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 form: Retardation film in which the orientation direction of the rod-like liquid crystal compound is spirally changed in the plane,
Fourth embodiment: a retardation film in which a discotic liquid crystal compound is tilt-aligned,
Fifth embodiment: A biaxial retardation film in which a discotic liquid crystal compound is oriented in a direction perpendicular to a supporting substrate is exemplified.

  For example, as an optical film used for an organic electroluminescence display, the first form, the second form, and the fifth form are suitably used. Alternatively, these may be stacked and used.

When the retardation film is a layer made of a polymer in the alignment state of the polymerizable liquid crystal compound (hereinafter sometimes referred to as “optically anisotropic layer”), the retardation film may have reverse wavelength dispersion. preferable. Reverse wavelength dispersion is an optical characteristic in which the in-plane retardation value of a liquid crystal alignment at a short wavelength is smaller than the in-plane retardation value of a liquid crystal alignment at a long wavelength. (7) and Formula (8) are satisfied. Re (λ) represents an in-plane retardation value with respect to light having a wavelength of 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 coloring at the time of black display on the display device is reduced. It is more preferable that Re (450) / Re (550) ≦ 0.93. Further, 120 ≦ Re (550) ≦ 150 is preferable.

  As the polymerizable liquid crystal compound in the case where the retardation film is a film having an optically anisotropic layer, “3” of Liquid Crystal Manual (Edited by Liquid Crystal Handbook Editorial Committee, Maruzen Co., Ltd. issued on October 30, 2000). .8.6 Network (fully crosslinked type) ”,“ 6.5.1 Liquid crystal material b. Polymerizable nematic liquid crystal material ”, compounds having a polymerizable group, and JP2010-31223A JP, 2010-270108, JP 2011-6360, JP 2011-207765, JP 2011-162678, JP 2011-81035, International Publication No. 2017/043438. And polymerizable liquid crystal compounds described in JP-A-2011-207765.

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

In the case of the second embodiment, the front phase difference 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 thickness direction retardation value R _th is −10 to −. What is necessary is just to adjust to the range of 300 nm, Preferably it is -20--200 nm. Retardation value in the thickness direction R _th, which means the refractive index anisotropy in the thickness direction, the retardation of the retardation values R ₅₀ and the surface to be measured is tilted 50 degrees fast axis in plane as a tilt axis It can be calculated from the value R ₀ . That is, the retardation value R _th in the thickness direction is the in-plane retardation value R ₀ , the retardation value R ₅₀ measured by tilting the fast axis by 50 degrees, the thickness d of the retardation film, and the level 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 + _ny ) / 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 ′ = _ny × _nz / [ _ny ² × sin ² (φ) + _nz ² × cos ² (φ)] ^1/2

  The retardation film may be a multilayer film having two or more layers. For example, what laminated | stacked the protective film on the single side | surface or both surfaces of retardation film, and the thing on which two or more retardation films were laminated | stacked through 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, the configuration of the optical laminate including the optical film of the present invention is as follows. A quarter-wave retardation layer 50 that imparts a phase difference of ½ wavelength and a ½ wavelength retardation layer 70 that imparts a phase difference of ½ wavelength to transmitted light via an adhesive or a pressure-sensitive adhesive 60. The structure containing the laminated | stacked optical film 40 is mentioned. Moreover, as shown in FIG. 4, 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 ¼ wavelength phase difference layer 50 for imparting a phase difference for ¼ wavelength in FIG. 3 and the ½ wavelength phase difference layer 70 for imparting a phase difference for ½ wavelength to the transmitted light are the above first. The optical film of the fifth form or the optical film of the fifth form may be used. In the case of the configuration of FIG. 3, it is more preferable that at least one of the configurations is the fifth form.

  In the configuration of FIG. 4, the quarter-wave retardation layer 50 a is preferably the optical film of the first form, and more preferably satisfies the expressions (7) and (8).

  The window film means a front plate in a flexible liquid crystal display device such as a flexible display, and is generally disposed on the outermost surface of the display device. Examples of the window film include 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 polyimide and silica. The window film may be provided with a hard coat layer on the surface for imparting functions of surface hardness, antifouling property, and fingerprint resistance. Examples of the wind film include films described in JP-A-2017-94488.

The thickness of the retardation film is usually 0.1 to 100 μm.
When the retardation film is a multilayer, the total thickness may be 0.2 to 200 μm.

Examples of the polarizing film include the same polarizing films described in the oxygen shielding layer.
Other layers or films may be further laminated between the polarizing plate and the panel as shown in FIG. 3 or FIG. When used as a circularly polarizing plate for an organic EL display, a retardation layer having a quarter-wave retardation layer and a half-wave retardation layer and a quarter-wave layer with reverse wavelength dispersion are laminated. It is preferable. The retardation layer is preferably a liquid crystal retardation film from the viewpoint of thinning.

  When the light selective absorption layer 10 is a pressure-sensitive adhesive layer having a light selective absorption function, a separate film (release film) laminated on the outer surface of the light selective absorption layer 10 may be included. This separate film is usually peeled and removed when the light selective absorption layer 10 is used (for example, when laminated on the optical film 40). The separate film is, for example, a film made of various resins such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate, polyalate, and the like on which the light selective absorption layer 10 is formed and subjected to a release treatment such as silicone treatment. be able to.

  When the light selective absorption layer 10 is a pressure-sensitive adhesive layer having a light selective absorption function, each component constituting the light pressure-sensitive adhesive composition is dissolved or dispersed in a solvent to obtain a solvent-containing pressure-sensitive adhesive composition, and then Is applied to the surface of the oxygen shielding layer 20 and dried to form the light selective absorption layer 10, whereby the optical film of the present invention can be obtained. In the optical film of the present invention, the light selective absorption layer 10 is formed on the release treatment surface of the separate film in the same manner as above, and this light selective absorption layer 10 is laminated (transferred) on the surface of the oxygen shielding layer 20. Can also be obtained. Between the oxygen shielding layer and the light selective absorption layer, another film or layer may be laminated. Even when not directly laminated, the optical film of the present invention can exhibit excellent optical properties and durability.

  The optical film of the present invention can be suitably used for organic EL display devices and liquid crystal display devices. A preferred form of the optical film of the present invention is a polarizing plate. When the polarizing plate which is the optical film of the present invention is disposed in an organic EL display device or a liquid crystal display device, a display device having excellent display performance and good durability can be provided.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated further more concretely, this invention is not limited by these examples. In the examples, “%” and “part” representing the content or amount used are based on mass unless otherwise specified.

<Creation of polarizing film>
[Production Example 1]
A polyvinyl alcohol film (trade name “Kuraray Vinylon VF-PE # 3000” manufactured by Kuraray Co., Ltd.) having an average polymerization degree of about 2400, a saponification degree of 99.9 mol%, and a thickness of 30 μm was immersed in pure water at 37 ° C. Then, it was immersed at 30 ° C. in an aqueous solution containing iodine and potassium iodide (iodine / potassium iodide / water (mass 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 (mass 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 having a thickness of about 12 μm in which iodine was adsorbed and oriented on polyvinyl alcohol. Stretching was mainly performed in the iodine staining and boric acid treatment steps, and the total stretching ratio was 5.3 times.

[Production Example 2]
A polyvinyl alcohol film (trade name “Kuraray Vinylon VF-PS # 7500” manufactured by Kuraray Co., Ltd.) having an average polymerization degree of about 2400, a saponification degree of 99.9 mol%, and a thickness of 75 μm was immersed in pure water at 37 ° C. Then, 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 having a thickness of about 28 μm in which iodine was adsorbed and oriented on polyvinyl alcohol. Stretching was mainly performed in the iodine staining and boric acid treatment steps, and the total stretching ratio was 5.3 times.

<Oxygen shielding layer>
PET: Polyethylene terephthalate film with a thickness of 38 μm (trade name “R64S” obtained from Toray Industries, Inc.)
PVA: polarizing film having a thickness of 28 μm (produced in Production Example 2)
COP: 50 μm thick cycloolefin film (trade name “ZB-12” obtained from Nippon Zeon Co., Ltd.)

<Evaluation of oxygen permeability>
Using a differential pressure type gas permeability measuring device (GTR-30AS type) manufactured by GTR-Tech Co., Ltd., in accordance with JIS K7126-1 (differential pressure method), “PET”, “PVA” and “COP” Each oxygen permeability was evaluated. The measurement conditions are as follows. The results are shown in Table 1. In Table 1, the unit of oxygen permeability is cm 3 / (m 2 · 24 h · atm).

Measurement temperature: 30 ° C
Transmission area: 15.2cm2 (φ44mm)
Permeated gas: Oxygen (ultra high purity)
Supply gas pressure: 2 kgf / cm2 (Differential pressure: 223 cmHg)

ジムロート冷却管、温度計を設置した２００ｍＬ−四ツ口フラスコ内を窒素雰囲気とし、特許文献（特開２０１４−１９４５０８）を参考に合成した式（ａａ）で表される化合物１０部、無水酢酸（和光純薬工業株式会社製）３．６部、シアノ酢酸２−エチルヘキシル（ＤＩＰＥＡと称する場合がある；東京化成工業株式会社製）６．９部、およびアセトニトリル（和光純薬工業株式会社製）６０部を仕込み、マグネチックスターラーで撹拌した。内温２５℃にてＤＩＰＥＡ（東京化成工業株式会社製）４．５部を滴下漏斗から１時間かけて滴下し、滴下終了後に内温２５℃にてさらに２時間保温した。反応終了後、減圧エバポレーターを用いてアセトニトリルを除去し、カラムクロマトグラフィー（シリカゲル）に供して精製し、式（ａａ１）で表される光選択吸収性化合物（１）を含む流出液を、減圧エバポレーターを用いて溶媒を除去し、黄色結晶を得た。該結晶を６０℃減圧乾燥することにより、黄色粉末として光選択吸収性化合物（１）を４．６部得た。収率は５０％であった。 <Synthesis of photoselective absorbing compound>
(Synthesis Example 1) Synthesis of photoselective absorbing compound (1)

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

^{When 1} H-NMR analysis was performed, the following peaks were observed, confirming that photoselective absorptive compound 1 was produced.
¹ H-NMR (CDCl 3) δ: 0.87-0.94 (m, 6H), 1.32-1.67 (m, 8H), 1.59-1.66 (m, 2H); 09 (quin, 2H), 3.00 (m, 5H), 3.64 (t, 2H), 4.10 (dd, 2H), 5.52 (d, 2H), 7.87 (d, 2H) )

<Measurement of Gram extinction coefficient ε>
In order to measure the Gram extinction coefficient of the obtained light selective absorption compound (1), the light selective absorption compound (1) was dissolved in 2-butanone. The obtained solution (concentration: 0.006 g · L ⁻¹ ) was put in a 1 cm quartz cell, and the quartz cell was set in a spectrophotometer UV-2450 (manufactured by Shimadzu Corporation), and a 1 nm step 300 to 300 nm by a 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 extinction coefficient for each wavelength was calculated using the following formula.
ε (λ) = A (λ) / CL
[Wherein, ε (λ) represents the gram extinction coefficient L / (g · cm) of the compound at the wavelength λnm, A (λ) represents the absorbance at the wavelength λnm, 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 absorptive compound (1) was measured, λmax = 389 nm (in 2-butanone), the value of ε (405) was 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) Preparation of (meth) acrylic resin (meth) acrylic resin was prepared by the following method. For the measurement of the weight average molecular weight and the number average molecular weight, four columns of “TSK gel XL (manufactured by Tosoh Corp.)” and “Shodex GPC KF-802 (manufactured by Showa Denko KK)” as a column in a GPC apparatus were used. A total of 5 tubes are connected in series, and tetrahydrofuran is used as the eluent, sample concentration is 5 mg / mL, sample introduction amount is 100 μL, temperature is 40 ° C., flow rate is 1 mL / min, and calculated by standard polystyrene conversion. did.

  In a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer and a stirrer, 81.8 parts of ethyl acetate, 70.4 parts of butyl acrylate, 20.0 parts of methyl acrylate, 2-phenoxyethyl acrylate 8 as solvents A solution obtained by mixing with 0.0 part, 1.0 part of 2-hydroxyethyl acrylate and 0.6 part of acrylic acid was charged. After the air in the reaction vessel was replaced with nitrogen gas, the internal temperature was set to 60 ° C. Thereafter, a solution in which 0.12 part of azobisisobutyronitrile was dissolved 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., ethyl acetate was continuously introduced into the reaction vessel at an addition rate of 17.3 parts / hr so that the polymer concentration was approximately 35%. Added. After maintaining the internal temperature at 54 to 56 ° C. until 12 hours have elapsed from the start of the addition of ethyl acetate, ethyl acetate was added to adjust the polymer concentration to 20%, and the (meth) acrylic resin An ethyl acetate solution was obtained. The (meth) acrylic resin had a weight average molecular weight Mw of 1.39 million and a ratio Mw / Mn of the weight average molecular weight Mw to the number average molecular weight Mn of 5.32.

(Synthesis Example 3) Preparation of pressure-sensitive adhesive composition In the ethyl acetate solution (resin concentration: 20%) of the (meth) acrylic resin obtained above, 100 parts of the solid content of the solution was cross-linked (coronate). L, solid content 75%) 0.4 part, silane compound (KBM-403) 0.4 part, and photoselective absorptive compound (1) 2 parts obtained in Synthesis Example 1 were mixed, and solid content concentration was further mixed. The pressure-sensitive adhesive composition was obtained by adding ethyl acetate so as to be 14%. The compounding quantity of the said crosslinking agent is the weight part as an active ingredient.

The details of the crosslinking agent and silane compound used in Synthesis Example 3 are as follows.
Crosslinking agent: Trimethylolpropane adduct of tolylene diisocyanate in ethyl acetate solution (solid content concentration 75%), trade name “Coronate L” obtained from Tosoh Corporation.
Silane compound: 3-glycidoxypropyltrimethoxysilane, trade name “KBM403” obtained from Shin-Etsu Chemical Co., Ltd.

<Preparation of light selective absorption layer (adhesive layer)>
Each of the pressure-sensitive adhesive compositions prepared above was subjected to a release treatment of a separate film (trade name “PLR-382190” obtained from Lintec Co., Ltd.) made of a polyethylene terephthalate film subjected to a release treatment. It was applied so that the thickness after drying was 20 μm, and dried at 100 ° C. for 1 minute to prepare a light selective absorption layer (1) of the pressure-sensitive adhesive layer (pressure-sensitive adhesive sheet).

Example 1
After performing corona discharge treatment on one side of “PET” of the oxygen shielding layer, the surface opposite to the separate film (adhesive layer surface) of the light selective absorption layer (1) prepared above was bonded with a laminator The film was cured for 7 days under the conditions of a temperature of 23 ° C. and a relative humidity of 65% to obtain an optical film (an optical film with an adhesive) (1) including an oxygen shielding layer and a light selective absorption layer. Subsequently, the optical film with an adhesive was cut into a size of 30 mm × 30 mm, and bonded to non-alkali glass [trade name “EAGLE XG” manufactured by Corning Inc.] to make a sample. The oxygen shielding layer of the prepared sample was measured by the method described above. Moreover, the light absorbency of the wavelength range of 300-800 nm of the produced sample was measured using the spectrophotometer (UV-2450: Shimadzu Corporation make). The results are shown in Table 1. The absorbance of the alkali-free glass alone at a wavelength of 450 nm was 0.

<Evaluation of absorbance retention>
The sample after the absorbance measurement was put into a sunshine weather meter (manufactured by Suga Test Instruments Co., Ltd.) for 24 hours at 63 ° C. and 50% relative humidity, and a 24-hour weather resistance test was performed. The absorbance of the sample taken out was measured by the same method as described above. From the measured absorbance, the absorbance retention of the sample at 405 nm was determined based on the following formula. The results are shown in Table 1. The higher the absorbance retention, the better the weather resistance without deterioration of the light selective absorption function.
Absorbance retention rate = A (405) after durability test / A (405) before durability test × 100

(Example 2)
An optical film (2) was obtained in the same manner as in Example 1 except that “PVA” was used instead of “PET” as the oxygen shielding layer. The obtained optical film (2) was subjected to measurement of oxygen permeability, absorbance, and evaluation of absorbance retention using the same methods as described above. The results are shown in Table 1.

(Comparative Example 1)
An optical film (3) was obtained in the same manner as in Example 1 except that “COP” was used instead of “PET” as the oxygen shielding layer. The obtained optical film (3) was subjected to the measurement of oxygen permeability, absorbance, and evaluation of absorbance retention using the same method as described above. The results are shown in Table 1.

(Example 3)
On one side of the polarizing film obtained in Synthesis Example 1 (oxygen permeability was 10 or less), a transparent protective film (manufactured by Konica Minolta, Inc .: trade name “KC2UA”) made of a 25 μm thick triacetylcellulose film was used. It bonded together through the adhesive agent which consists of an aqueous solution of a polyvinyl alcohol-type resin. Next, on the surface of the polarizing film opposite to the triacetylcellulose film, a zero retardation film (manufactured by Nippon Zeon Co., Ltd .: trade name “ZEONOR”) made of a cyclic polyolefin having a thickness of 23 μm is placed in an aqueous solution of a polyvinyl alcohol resin. The polarizing plate was produced by bonding through an adhesive consisting of
An optical film (4) was obtained in the same manner as in Example 1 except that the produced polarizing plate was an oxygen shielding layer. The obtained optical film (4) was measured for oxygen permeability, absorbance, and evaluation of absorbance retention using the same method as described above. The results are shown in Table 1.

The optical film of the present invention has good absorption performance with respect to light having a wavelength of about 405 nm. Therefore, when the optical film of the present invention is laminated on a retardation film or an organic EL element, the optical film of the present invention absorbs light having a wavelength of about 405 nm and blocks light having a wavelength of about 405 nm to the retardation film or the organic EL element. It is possible to suppress deterioration of the retardation film and the organic EL element from short-wavelength visible light.
Since the optical film of the present invention has a low oxygen permeability, it has a good light absorption function near the wavelength of 405 nm (good absorbance retention) even after the weather resistance test, and has good weather resistance (durability). Have. Therefore, it is possible to maintain the suppression of deterioration of the retardation film or the like caused by short wavelength visible light. When the optical film of the present invention is used in a liquid crystal display device, deterioration can be further suppressed.

  The optical film of the present invention is suitably used for liquid crystal panels and liquid crystal display devices.

DESCRIPTION OF SYMBOLS 1 Optical film 1A, 1B, 1C Optical laminated body 10 Light selective absorption layer 20 Oxygen shielding layer 30 Adhesive layer 30a Adhesive layer 40 Optical film 50, 50a 1/4 wavelength phase difference layer 60 Adhesive layer 70 1/2 wavelength Retardation layer 80 Positive C layer 90 Protective film 100 Polarizing plate 110 Light emitting element

Claims (13)

An optical film comprising at least one light selective absorption layer and at least one oxygen shielding layer and satisfying the following formulas (1) and (2):
A (405) ≧ 0.5 (1)
Oxygen permeability ≦ 500 (2)
[In Formula (1), A (405) represents the light absorbency in wavelength 405nm. The unit of oxygen permeability is cm 3 / (m 2 · 24 h · atm). ] The optical film of Claim 1 which satisfy | fills following formula (3).
A (440) ≦ 0.1 (3)
[In Formula (1), A (440) represents the light absorbency in wavelength 440nm. ] Furthermore, the optical film of Claim 1 or 2 which satisfy | fills Formula (4).
A (405) / A (440) ≧ 5 (4)
[In Formula (4), 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 claim 1, wherein the light selective absorption layer is a pressure-sensitive adhesive layer having a light selective absorption function.   The light selective absorption layer is a pressure sensitive adhesive layer formed from a pressure sensitive adhesive composition containing a (meth) acrylic resin (A), a crosslinking agent (B) and a light selective absorption compound (C). Optical film.   The optical film according to claim 5, wherein the content of the crosslinking agent (B) is 0.01 to 15 parts by mass with respect to 100 parts by mass of the (meth) acrylic resin (A).   The optical film according to claim 5 or 6, wherein the content of the light selective absorption compound (C) is 0.01 to 20 parts by mass with respect to 100 parts by mass of the (meth) acrylic resin (A). The optical film according to any one of claims 5 to 7, wherein the light selective absorption compound (C) is a compound satisfying the following formula (5).
ε (405) ≧ 20 (5)
[In Formula (5), (epsilon) (405) represents the gram extinction coefficient of the compound in wavelength 405nm. ] The optical film according to claim 8, wherein the light selective absorption compound (C) is a compound satisfying the following formula (6).
ε (405) / ε (440) ≧ 20 (6)
[In formula (6), ε (405) represents the gram extinction coefficient of the compound at a wavelength of 405 nm, and ε (440) represents the gram extinction coefficient at a wavelength of 440 nm. ]   The optical film according to claim 5, wherein the light selective absorption compound (C) is a compound having a merocyanine structure in the molecule.   The oxygen shielding layer is formed of at least one resin selected from polyester resin (E), polyvinyl alcohol resin (F), polyamide resin (G), polyimide resin (H), and cellulose resin (I). The optical film according to claim 1, wherein the optical film is a resin layer.   The optical film according to claim 1, wherein the oxygen shielding layer is a polarizing film formed from a polyvinyl alcohol-based resin.   The display apparatus containing the optical film of Claims 1-12.

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