CN114502687A

CN114502687A - Adhesive composition

Info

Publication number: CN114502687A
Application number: CN202080071119.1A
Authority: CN
Inventors: 浅津悠司; 西上由纪; 久门浩司
Original assignee: Sumitomo Chemical Co Ltd
Current assignee: Sumitomo Chemical Co Ltd
Priority date: 2019-10-11
Filing date: 2020-10-06
Publication date: 2022-05-13
Also published as: TW202124644A; KR20220082018A; JP2021063219A; WO2021070800A1

Abstract

Provided are a pressure-sensitive adhesive layer which has sufficient ultraviolet absorption performance even when the thickness is reduced, and which generates little bleeding and absorbs little visible light having a wavelength of about 420nm, and a pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer. Provided is an adhesive composition containing a resin (A), a light selective absorption compound (B) which contains a merocyanine structure in the molecule and exhibits maximum absorption at a wavelength of 360nm or more, and a light selective absorption compound (C) which contains a polymerizable group in the molecule and exhibits maximum absorption in a range of less than the wavelength of 360 nm. Preferably, the adhesive composition further comprises an initiator.

Description

Adhesive composition

Technical Field

The present invention relates to an adhesive composition, an adhesive layer formed from the adhesive composition, and an optical laminate in which the adhesive layer is laminated.

Background

In display devices (FPD: flat panel display) such as organic electroluminescent displays (organic EL display devices) and liquid crystal display devices, various members such as display elements such as organic EL elements and liquid crystal cells, and optical films such as polarizing plates are used. Among these members, many liquid crystal compounds used in organic EL devices and liquid crystal cells are low in weather resistance, and deterioration by Ultraviolet (UV) rays is likely to cause a problem. In order to solve such a problem, patent document 1 describes an ultraviolet-absorbing (shielding) adhesive composition containing an acrylic resin and a triazine-based ultraviolet absorber, and also describes an adhesive layer having a thickness of 15 μm formed from the adhesive composition.

Documents of the prior art

Patent literature

Patent document 1: japanese laid-open patent publication No. 2008-248131

Disclosure of Invention

Problems to be solved by the invention

In recent years, remarkable thinning has been required for organic EL display devices and liquid crystal display devices, and also for members used in organic EL display devices and liquid crystal display devices. Therefore, the ultraviolet-absorbing (shielding) adhesive layer itself is also required to be made thin. However, when the ultraviolet-absorbing (shielding) pressure-sensitive adhesive layer is merely made thin (for example, less than 12 μm), the ultraviolet absorption performance of the pressure-sensitive adhesive layer is lowered. On the other hand, if the amount of the ultraviolet absorber added is increased by thinning the pressure-sensitive adhesive layer while maintaining the ultraviolet absorption performance, problems such as bleeding of the ultraviolet absorber and coloring due to absorption of visible light having a wavelength of 420nm or more occur.

Means for solving the problems

The present invention includes the following inventions.

[1] An adhesive composition comprising

A resin (A),

A light selective absorbing compound (B) containing a merocyanine structure in the molecule and showing maximum absorption at a wavelength of 360nm or more, and

a light selective absorbing compound (C) which contains a polymerizable group in a molecule and exhibits maximum absorption in a range of a wavelength of 300nm or more and a wavelength of less than 360 nm.

[2] The adhesive composition according to [1], further comprising an initiator (D).

[3] The adhesive composition according to [2], wherein the initiator (D) is a radical generator.

[4] The adhesive composition according to [2] or [3], wherein the initiator (D) is a photo radical generator.

[5] The adhesive composition according to any one of [2] to [4], wherein the initiator (D) is an oxime ester photo radical generator.

[6] The adhesive composition according to any one of [1] to [5], further comprising a radical-curable component (E).

[7] The adhesive composition according to [6], wherein the radically curable component (E) is a (meth) acrylate compound.

[8] The adhesive composition according to [6] or [7], wherein the radical-curable component (E) is a polyfunctional (meth) acrylate compound.

[9] The adhesive composition according to any one of [1] to [8], further comprising a crosslinking agent (F).

[10] The adhesive composition according to [9], wherein the crosslinking agent (F) is an isocyanate-based crosslinking agent.

[11] The adhesive composition according to any one of [1] to [10], wherein the glass transition temperature of the resin (A) is 40 ℃ or lower.

[12] The adhesive composition according to [11], wherein the resin (A) having a glass transition temperature of 40 ℃ or lower is a (meth) acrylic resin.

[13] The adhesive composition according to any one of [1] to [12], wherein the light selective absorbing compound (B) containing a merocyanine structure in a molecule and showing a maximum absorption at a wavelength of 360nm or more satisfies the following formula (1).

ε(380)≥25 (1)

[ in the formula (1), [ epsilon ] (380) represents an molar absorption coefficient at a wavelength of 380nm of a light selective absorption compound (B) which contains a merocyanine structure in the molecule and exhibits a maximum absorption at a wavelength of 360nm or more. The molar absorptivity was expressed in L/(g.cm). ]

[14] The adhesive composition according to any one of [1] to [13], wherein the light selective absorbing compound (B) containing a merocyanine structure in a molecule and showing a maximum absorption at a wavelength of 360nm or more satisfies the following formula (2).

ε(380)/ε(420)≥20 (2)

[ in the formula (2), [ epsilon (380) represents an molar absorption coefficient at a wavelength of 380nm of a light selective absorption compound (B) which contains a merocyanine structure in the molecule and exhibits maximum absorption at a wavelength of 360nm or more,

ε (420) represents the molar absorption coefficient at a wavelength of 420nm of a light selective absorbing compound (B) which contains a merocyanine structure in the molecule and shows a maximum absorption at a wavelength of 360nm or more. ]

[15] The adhesive composition according to any one of [1] to [14], wherein the light selective absorbing compound (B) containing a merocyanine structure in the molecule and exhibiting a maximum absorption at a wavelength of 360nm or more is a compound represented by formula (Y).

[ in the formula (Y),

R^Y3、R^Y4and R^Y5Each independently represents an electron withdrawing group.

R^Y1、R^Y2、R^Y6And R^Y7Each independently represents a hydrogen atom, a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group, -SCF₃、-SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH may be substituted by-NR^1A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^2A-、-NR^3A-CO-、-S-、-SO-、-SO₂-、-CF₂-or-CHF-.

R^1A、R^2AAnd R^3AEach independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

R^Y1And R^Y2May be connected to each other to form a ring.

R^Y1And R^Y6May be connected to each other to form a ring.

R^Y4And R^Y5May be connected to each other to form a ring.]

[16] The adhesive composition according to any one of [1] to [14], wherein the light selective absorbing compound (B) containing a merocyanine structure in a molecule and showing a maximum absorption at a wavelength of 360nm or more is a compound having a molecular weight of 3000 or less and having a partial structure represented by formula (X).

[ in the formula (X), the ring W ¹Represents a ring structure having at least 1 double bond as a ring constituent and having no aromatic character.

R³Represents a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group, -SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH-may be substituted by-O-, -S-, -NR^1xA-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2xA-、-NR^3xA-CO-、-O-CO-NR^4xA-、-NR^5xA-CO-O-、-NR^6xA-CO-NR^7xA-、-CO-S-、-S-CO-S-、-S-CO-NR^8xA-、-NR^9xA-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10xA-CS-、-NR^11xA-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-。

R^1xA、R^2xA、R^3xA、R^4xA、R^5xA、R^6xA、R^7xA、R^8xA、R^9xA、R^10xAAnd R^11xAEach independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.]

[17] The adhesive composition according to [16], wherein the compound having a molecular weight of 3000 or less and a partial structure represented by the formula (X) is any one of a compound represented by the formula (I) to a compound represented by the formula (VIII).

[ formulae (I) to (VIII),

ring W¹And R³The same meaning as above is indicated.

Ring W²Ring W³Ring W⁴Ring W⁵Ring W⁶Ring W⁷Ring W⁸Ring W⁹Ring W¹⁰Ring W¹¹And a ring W¹²Each independently represents a ring structure having at least 1 double bond as a constituent of the ring.

Ring W¹¹¹Represents a ring having at least 2 nitrogen atoms as a constituent.

Ring W¹¹²And a ring W¹¹³Each independently represents a ring having at least 1 nitrogen atom as a constituent.

R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²And R¹¹²Each independently represents a hydrogen atom, a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group or-SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH may be substituted by-NR^12A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^13A-、-NR^14A-CO-、-S-、-SO-、-CF₂-or-CHF-.

R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³Each independently represents a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group or-SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH-may be substituted by-O-, -S-, -NR^1A-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2A-、-NR^3A-CO-、-O-CO-NR^4A-、-NR^5A-CO-O-、-NR^6A-CO-NR^7A-、-CO-S-、-S-CO-S-、-S-CO-NR^8A-、-NR^9A-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10A-CS-、-NR^11A-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-。

R^1A、R^2A、R^3A、R^4A、R^5A、R^6A、R^7A、R^8A、R^9A、R^10A、R^11A、R^12A、R^13AAnd R^14AEach independently represents a hydrogen atom orAn alkyl group having 1 to 6 carbon atoms.

R⁴、R¹⁴、R²⁴、R³⁴、R⁴⁴、R⁵⁴、R⁶⁴、R⁷⁴、R⁸⁴、R⁹⁴、R¹⁰⁴、R¹¹⁴、R⁵、R¹⁵、R²⁵、R³⁵、R⁷⁵And R⁸⁵Each independently represents an electron withdrawing group.

R¹And R²May be bonded to each other to form a ring.

R⁴¹And R⁴²May be bonded to each other to form a ring.

R⁵¹And R⁵²May be bonded to each other to form a ring.

R⁶¹And R⁶²May be bonded to each other to form a ring.

R⁹¹And R⁹²May be bonded to each other to form a ring.

R¹⁰¹And R¹⁰²May be bonded to each other to form a ring.

R¹¹¹And R¹¹²May be bonded to each other to form a ring.

R²And R³May be bonded to each other to form a ring.

R¹²And R¹³May be bonded to each other to form a ring.

R⁴²And R⁴³May be bonded to each other to form a ring.

R⁵²And R⁵³May be bonded to each other to form a ring.

R⁶²And R⁶³May be bonded to each other to form a ring.

R⁷²And R⁷³May be bonded to each other to form a ring.

R⁸²And R⁸³May be bonded to each other to form a ring.

R⁹²And R⁹³May be bonded to each other to form a ring.

R¹⁰²And R¹⁰³May be bonded to each other to form a ring.

R¹¹²And R¹¹³May be bonded to each other to form a ring.

R⁴And R⁵May be bonded to each other to form a ring.

R¹⁴And R¹⁵May be bonded to each other to form a ring.

R²⁴And R²⁵May be bonded to each other to form a ring.

R³⁴And R³⁵May be bonded to each other to form a ring.

R⁷⁴And R⁷⁵May be bonded to each other to form a ring.

R⁸⁴And R⁸⁵May be bonded to each other to form a ring.

R⁶And R⁸Each independently represents a divalent linking group.

R⁷Represents a single bond or a divalent linking group.

R⁹And R¹⁰Each independently represents a trivalent linking group.

R¹¹Represents a tetravalent linker.]

[18] An adhesive layer comprising the adhesive composition according to any one of [1] to [17 ].

[19] The adhesive layer according to [18], which satisfies the following formula (3).

A(380)≥0.60 (3)

In the formula (3), A (380) represents the absorbance at a wavelength of 380 nm. ]

[20] The adhesive layer according to [18] or [19], which further satisfies the following formula (4).

A(380)/A(420)≥5 (4)

In the formula (4), A (380) represents the absorbance at a wavelength of 380nm, and A (420) represents the absorbance at a wavelength of 420 nm. ]

[21] The pressure-sensitive adhesive layer according to any one of [18] to [20], wherein a film thickness of the pressure-sensitive adhesive layer is 10 μm or less.

[22] An optical film with an adhesive layer, wherein the optical film is laminated on at least one surface of the adhesive layer according to any one of [18] to [21 ].

[23] The optical film with an adhesive layer according to [22], wherein the optical film is a polarizing plate.

[24] An image display device comprising the optical film with an adhesive layer of [22] or [23 ].

ADVANTAGEOUS EFFECTS OF INVENTION

The invention provides a pressure-sensitive adhesive layer which has sufficient ultraviolet absorption performance even if the thickness is reduced (for example, less than 12 mu m), generates little exudation, and absorbs little visible light with the wavelength of about 420nm, and a pressure-sensitive adhesive composition for forming the pressure-sensitive adhesive layer.

Drawings

Fig. 1 shows an example of the layer structure of a laminate in which a release film is provided on a pressure-sensitive adhesive layer of the present invention.

Fig. 2 shows an example of the layer structure of the optical film with an adhesive layer of the present invention.

Fig. 3 shows an example of the layer structure of the optical film with an adhesive layer of the present invention.

Fig. 4 shows an example of the layer structure of the optical laminate of the present invention.

Fig. 5 shows an example of the layer structure of the optical laminate of the present invention.

Detailed Description

< adhesive composition >

The adhesive composition of the present invention comprises the following (Z-1) to (Z-3).

(Z-1): resin (A)

(Z-2): a light selective absorbing compound (B) having a merocyanine structure in the molecule and exhibiting maximum absorption at a wavelength of 360nm or more (hereinafter, sometimes referred to as a light selective absorbing compound (B))

(Z-3): a light selective absorbing compound (C) having a polymerizable group in a molecule and showing maximum absorption in a range of a wavelength of 300nm or more and a wavelength of less than 360nm (hereinafter, sometimes referred to as a light selective absorbing compound (C))

< resin (A) >

The resin (a) of the present invention is not particularly limited if it is a resin used in an adhesive composition.

The resin (A) is preferably a resin having a glass transition temperature (Tg) of 40 ℃ or lower. The glass transition temperature (Tg) of the resin (A) is more preferably 20 ℃ or lower, still more preferably 10 ℃ or lower, and particularly preferably 0 ℃ or lower. The glass transition temperature of the resin (A) is usually-80 ℃ or higher, preferably-70 ℃ or higher, more preferably-60 ℃ or higher, still more preferably-55 ℃ or higher, and particularly preferably-50 ℃ or higher. When the glass transition temperature of the resin (a) is 40 ℃ or lower, it is advantageous to improve the adhesion of the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition containing the resin (a) to an adherend. When the glass transition temperature of the resin (a) is-80 ℃ or higher, it is advantageous to improve the durability of the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition containing the resin (a). The glass transition temperature can be measured by a Differential Scanning Calorimeter (DSC).

Further, the resin (A) preferably does not exhibit maximum absorption at a wavelength of 300nm to 780 nm.

Examples of the resin (a) include (meth) acrylic resins, silicone resins, rubber resins, urethane resins, and the like, and (meth) acrylic resins are preferable.

The (meth) acrylic resin is preferably a polymer containing a structural unit derived from a (meth) acrylate ester as a main component (preferably containing 50 mass% or more). The structural unit derived from a (meth) acrylate ester may contain one or more structural units derived from a monomer other than a (meth) acrylate ester (for example, a structural unit derived from a monomer having a polar functional group). In the present specification, (meth) acrylic acid means any of acrylic acid and methacrylic acid, and "(meth)" in the case of (meth) acrylate and the like is also used in the same manner.

Examples of the (meth) acrylate include (meth) acrylates represented by the following formula (a).

[ in the formula (a), R_1ARepresents a hydrogen atom or a methyl group, R_2ARepresents an alkyl group having 1 to 14 carbon atoms or an aromatic hydrocarbon group having 6 to 20 carbon atoms, and the hydrogen atoms of the alkyl group and the aromatic hydrocarbon group may be substituted with an alkoxy group having 1 to 10 carbon atoms. ]

In the formula (a), R_2APreferably an alkyl group having 1 to 14 carbon atoms, and more preferably an alkyl group having 1 to 8 carbon atoms.

Examples of the (meth) acrylate represented by the formula (a) include:

linear alkyl esters of (meth) acrylic acid such as 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, lauryl (meth) acrylate, and stearyl (meth) acrylate;

branched alkyl esters of (meth) acrylic acid such as isopropyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, isoamyl (meth) acrylate, isohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, isononyl (meth) acrylate, isostearyl (meth) acrylate, and isoamyl (meth) acrylate;

alicyclic skeleton-containing alkyl esters of (meth) acrylic acid such as cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, adamantyl (meth) acrylate, dicyclopentanyl (meth) acrylate, cyclododecyl (meth) acrylate, methylcyclohexyl (meth) acrylate, trimethylcyclohexyl (meth) acrylate, t-butylcyclohexyl (meth) acrylate, and cyclohexyl α -ethoxyacrylate;

Aromatic ring skeleton-containing esters of (meth) acrylic acid such as phenyl (meth) acrylate and benzyl (meth) acrylate; and the like.

Examples of the (meth) acrylate having a substituent include 2-methoxyethyl (meth) acrylate, ethoxymethyl (meth) acrylate, phenoxyethyl (meth) acrylate, and 2- (2-phenoxyethoxy) ethyl (meth) acrylate.

Examples of the (meth) acrylic acid ester include phenoxydiglycol (meth) acrylate and phenoxypoly (ethylene glycol) meth (acrylate).

These (meth) acrylates may be used alone or in combination of two or more.

The resin (a) of the present invention preferably contains a structural unit derived from an alkyl (meth) acrylate (a1) having a homopolymer glass transition temperature Tg of less than 0 ℃ and a structural unit derived from an alkyl (meth) acrylate (a2) having a homopolymer Tg of 0 ℃ or more. This is advantageous in improving the high-temperature durability of the adhesive layer. The Tg of the homopolymer of the alkyl (meth) acrylate can be obtained, for example, from literature values of POLYMER HANDBOOK (Wiley-Interscience) and the like.

Specific examples of the alkyl (meth) acrylate (a1) include alkyl (meth) acrylates having an alkyl group of about 2 to 12 carbon atoms such as ethyl acrylate, n-propyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, n-pentyl acrylate, n-hexyl acrylate, isohexyl acrylate, n-heptyl acrylate, n-octyl acrylate, isooctyl acrylate, 2-ethylhexyl acrylate, n-nonyl acrylate, isononyl acrylate, n-decyl acrylate, isodecyl acrylate, and n-dodecyl acrylate.

The alkyl (meth) acrylate (a1) may be used alone in 1 kind, or may be used in combination of 2 or more kinds. Among them, n-butyl acrylate, n-octyl acrylate, 2-ethylhexyl acrylate and the like are preferable from the viewpoint of followability and reworkability when laminated on an optical film.

The alkyl (meth) acrylate (a2) is an alkyl (meth) acrylate other than the alkyl (meth) acrylate (a 1). Specific examples of the alkyl (meth) acrylate (a2) include methyl acrylate, cyclohexyl acrylate, isobornyl acrylate, stearyl acrylate, t-butyl acrylate, and the like.

The alkyl (meth) acrylate (a2) may be used in only 1 kind, or may be used in combination of 2 or more kinds. Among them, the alkyl (meth) acrylate (a2) preferably contains methyl acrylate, cyclohexyl acrylate, isobornyl acrylate, and the like, and more preferably contains methyl acrylate, from the viewpoint of high-temperature durability.

The structural unit derived from the (meth) acrylate represented by formula (a) is preferably 50% by mass or more, more preferably 60 to 95% by mass, and even more preferably 65 to 95% by mass or more of the total structural units contained in the (meth) acrylic resin.

As the structural unit derived from a monomer other than the (meth) acrylate, a structural unit derived from a monomer having a polar functional group is preferable, and a structural unit derived from a (meth) acrylate having a polar functional group is more preferable. Examples of the polar functional group include a hydroxyl group, a carboxyl group, a substituted or unsubstituted amino group, and a heterocyclic group such as an epoxy group.

Examples of the monomer having a polar functional group include

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, 4-hydroxybutyl (meth) acrylate, 4-hydroxypentyl (meth) acrylate, 2-hydroxyheptyl (meth) acrylate, 2-hydroxyhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxy-yl (meth) acrylate, and the like, 4-hydroxyhexyl (meth) acrylate, 4-hydroxyheptyl (meth) acrylate, 4-hydroxyoctyl (meth) acrylate, 2-chloro-2-hydroxypropyl (meth) acrylate, 3-chloro-2-hydroxypropyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, 5-hydroxypentyl (meth) acrylate, 5-hydroxyhexyl (meth) acrylate, 5-hydroxyheptyl (meth) acrylate, 5-hydroxyoctyl (meth) acrylate, 5-hydroxynonyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 6-hydroxyheptyl (meth) acrylate, 6-hydroxyoctyl (meth) acrylate, 6-hydroxynonyl (meth) acrylate, 6-hydroxyheptyl (meth) acrylate, and the like, 6-hydroxydecyl (meth) acrylate, 7-hydroxyheptyl (meth) acrylate, 7-hydroxyoctyl (meth) acrylate, 7-hydroxynonyl (meth) acrylate, 7-hydroxydecyl (meth) acrylate, 7-hydroxyundecyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 8-hydroxynonyl (meth) acrylate, 8-hydroxydecyl (meth) acrylate, 8-hydroxyundecyl (meth) acrylate, 8-hydroxydodecyl (meth) acrylate, 9-hydroxynonyl (meth) acrylate, 9-hydroxydecyl (meth) acrylate, 9-hydroxyundecyl (meth) acrylate, 9-hydroxydodecyl (meth) acrylate, 9-hydroxytridecyl (meth) acrylate, and mixtures thereof, 10-hydroxydecyl (meth) acrylate, 10-hydroxyundecyl (meth) acrylate, 10-hydroxydodecyl (meth) acrylate, 10-hydroxytridecyl acrylate, 10-hydroxytetradecyl (meth) acrylate, 11-hydroxyundecyl (meth) acrylate, 11-hydroxydodecyl (meth) acrylate, 11-hydroxytridecyl (meth) acrylate, 11-hydroxytetradecyl (meth) acrylate, 11-hydroxypentadecyl (meth) acrylate, 12-hydroxydodecyl (meth) acrylate, 12-hydroxytridecyl (meth) acrylate, 12-hydroxytetradecyl (meth) acrylate, 13-hydroxypentadecyl (meth) acrylate, 13-hydroxytetradecyl (meth) acrylate, 10-hydroxyundecyl (meth) acrylate, 10-hydroxydodecyl (meth) acrylate, 10-hydroxytetradecyl (meth) acrylate, 11-hydroxytetradecyl (meth) acrylate, 12-hydroxytetradecyl (meth) acrylate, 11-hydroxytetradecyl (meth) acrylate, 12-hydroxytetradecyl (meth) acrylate, and (meth) acrylate, Hydroxyl group-containing monomers such as 13-hydroxypentadecyl (meth) acrylate, 14-hydroxytetradecyl (meth) acrylate, 14-hydroxypentadecyl (meth) acrylate, 15-hydroxypentadecyl (meth) acrylate, and 15-hydroxyheptadecyl (meth) acrylate;

Carboxyl group-containing monomers such as (meth) acrylic acid, carboxyalkyl (meth) acrylate (e.g., carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate), maleic acid, maleic anhydride, fumaric acid, and crotonic acid;

monomers having a heterocyclic group such as acryloylmorpholine, vinylcaprolactam, N-vinyl-2-pyrrolidone, vinylpyridine, tetrahydrofurfuryl (meth) acrylate, caprolactone-modified tetrahydrofurfuryl acrylate, 3, 4-epoxycyclohexylmethyl (meth) acrylate, glycidyl (meth) acrylate, 2, 5-dihydrofuran and the like;

monomers having a substituted amino group or an unsubstituted amino group such as aminoethyl (meth) acrylate, N-dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, and the like.

Among them, from the viewpoint of reactivity of the (meth) acrylate polymer with the crosslinking agent, the monomer having a hydroxyl group and the monomer having a carboxyl group are preferable, and the monomer having a hydroxyl group and the monomer having a carboxyl group are more preferably contained at the same time.

As the monomer having a hydroxyl group, 2-hydroxyethyl acrylate, 3-hydroxypropyl acrylate, 4-hydroxybutyl acrylate, 5-hydroxypentyl acrylate, and 6-hydroxyhexyl acrylate are preferable. In particular, by using 2-hydroxyethyl acrylate, 4-hydroxybutyl acrylate and 5-hydroxypentyl acrylate, good durability can be obtained.

As the monomer having a carboxyl group, acrylic acid is preferably used.

From the viewpoint of preventing the release force of the separator that can be laminated on the outer surface of the pressure-sensitive adhesive layer from increasing, the (meth) acrylic resin preferably contains substantially no structural unit derived from a monomer having an amino group. The term "substantially not included" means 0.1 parts by mass or less in 100 parts by mass of all structural units constituting the (meth) acrylic resin.

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 0.5 parts by mass or more and 15 parts by mass or less, further 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, with respect to 100 parts by mass of the total structural units of the (meth) acrylic resin.

As the structural unit derived from a monomer other than the (meth) acrylate, a structural unit derived from a monomer having an aromatic group can also be mentioned. Examples of the aromatic group-containing monomer include (meth) acrylates having 1 (meth) acryloyl group and 1 or more aromatic rings (e.g., benzene ring, naphthalene ring, etc.) in the molecule, and examples thereof include (meth) acrylates having a phenyl group, phenoxyethyl group, or benzyl group. The content of the structural unit derived from the aromatic group-containing monomer is preferably 20 parts by mass or less, more preferably 4 parts by mass or more and 20 parts by mass or less, and further preferably 4 parts by mass or more and 16 parts by mass or less, based on 100 parts by mass of the total structural units of the (meth) acrylic resin.

Examples of the structural unit derived from a monomer other than the (meth) acrylate include a structural unit derived from a styrene monomer, a structural unit derived from a vinyl monomer, a structural unit derived from a monomer having a plurality of (meth) acryloyl groups in the molecule, and a structural unit derived from a (meth) acrylamide monomer.

Examples of the styrene-based monomer include styrene; alkylstyrenes such as methylstyrene, dimethylstyrene, trimethylstyrene, ethylstyrene, diethylstyrene, triethylstyrene, propylstyrene, butylstyrene, hexylstyrene, heptylstyrene, octylstyrene and the like; halogenated styrenes such as fluorostyrene, chlorostyrene, bromostyrene, dibromostyrene, iodostyrene and the like; nitrostyrene; acetyl styrene; a methoxystyrene; and divinylbenzene.

Examples of the vinyl monomer include vinyl esters of fatty acids such as vinyl acetate, vinyl propionate, vinyl butyrate, vinyl 2-ethylhexanoate, and vinyl laurate; halogenated vinyl compounds such as vinyl chloride and vinyl bromide; vinylidene halides such as vinylidene chloride; nitrogen-containing heteroaromatic vinyl compounds such as vinylpyridine, vinylpyrrolidone and vinylcarbazole; conjugated dienes such as butadiene, isoprene and chloroprene; and unsaturated nitriles such as acrylonitrile and methacrylonitrile.

Examples of the monomer having a plurality of (meth) acryloyl groups in a molecule include monomers having 2 (meth) acryloyl groups in a molecule, such as 1, 4-butanediol di (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, 1, 9-nonanediol di (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, and tripropylene glycol di (meth) acrylate; a monomer having 3 (meth) acryloyl groups in the molecule, such as trimethylolpropane tri (meth) acrylate.

Examples of the (meth) acrylamide monomer 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-dimethyl (meth) acrylamide, N-diethyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N- (3-dimethylaminopropyl) (meth) acrylamide, N- (1, 1-dimethyl-3-oxobutyl) (meth) acrylamide, N-hydroxyhexyl (meth) acrylamide, N-hydroxyethyl (meth) acrylamide, N- (4-hydroxybutyl) (meth) acrylamide, N- (5-hydroxypentyl) (meth) acrylamide, N- (6-hydroxyhexyl) (meth) acrylamide, N-dimethyl (meth) acrylamide, N-diethyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N- (3-dimethylaminopropyl) (meth) acrylamide, N- (1, 1-dimethyl-3-oxobutyl) (meth) acrylamide, N-2-oxide, N- (2-hydroxyethyl) (meth) acrylamide, N- (3-hydroxybutyl) (meth) acrylamide, N- (3-hydroxy-acrylamide, N-2-hydroxy-2-acrylamide, N- (6-hydroxy-hexyl) (meth) acrylamide, N-2-hydroxy-2-hydroxy-yl) acrylamide, N-2-hydroxy-2-1-hydroxy-2-hydroxy-yl (meth) acrylamide, N-2-hydroxy-yl (meth) acrylamide, and N-2-hydroxy-2-yl (meth) acrylamide, and a mixture thereof, N- [2- (2-oxo-1-imidazolidinyl) ethyl ] (meth) acrylamide, 2-acrylamido-2-methyl-1-propanesulfonic acid, N- (methoxymethyl) acrylamide, N- (ethoxymethyl) (meth) acrylamide, N- (propoxymethyl) (meth) acrylamide, N- (1-methylethoxymethyl) (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-isopropylacrylamide, N- (2-ethoxymethyl) (meth) acrylamide, N- (2-methoxyethyl) (meth) acrylamide, N- (2-ethoxymethyl) acrylamide, N- (2-propoxymethyl) acrylamide, N, n- (2-ethoxyethyl) (meth) acrylamide, N- (2-propoxyethyl) (meth) acrylamide, N- [2- (1-methylethoxy) ethyl ] (meth) 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. Among them, 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 is preferably 50 to 250 ten thousand. When the weight average molecular weight is 50 ten thousand or more, the durability of the pressure-sensitive adhesive layer in a high-temperature environment is improved, and problems such as peeling of an adherend from the pressure-sensitive adhesive layer by lifting and cohesive failure of the pressure-sensitive adhesive layer are easily suppressed. If the weight average molecular weight is 250 ten thousand or less, it is advantageous from the viewpoint of coatability. From the viewpoint of satisfying both the durability of the pressure-sensitive adhesive layer and the coatability of the pressure-sensitive adhesive composition, the weight average molecular weight is preferably 60 to 180 ten thousand, more preferably 70 to 170 ten thousand, and particularly preferably 100 to 160 ten thousand. 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 is dissolved in ethyl acetate to form a 20 mass% solution, the viscosity at 25 ℃ is preferably 20 pas or less, and more preferably 0.1 to 15 pas. A viscosity in this range is advantageous from the viewpoint of coatability when the adhesive composition is applied to a substrate. The viscosity can be measured by a brookfield viscometer.

The (meth) acrylic resin can be produced by a known method such as solution polymerization, bulk polymerization, suspension polymerization, or emulsion polymerization, and the solution polymerization is particularly preferred. The solution polymerization method includes, for example, a method of mixing a monomer and an organic solvent, adding a thermal polymerization initiator under a nitrogen atmosphere, and stirring at a temperature of about 40 to 90 ℃, preferably about 50 to 80 ℃ for about 3 to 15 hours. In order to control the reaction, the monomer or the thermal polymerization initiator may be continuously or intermittently added during the polymerization. The monomer and the thermal polymerization initiator may be added to an organic solvent. Examples of the organic solvent include aromatic hydrocarbons such as toluene and xylene; esters such as ethyl acetate and butyl acetate; aliphatic alcohols such as propanol and isopropanol; ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone. As the thermal polymerization initiator, a known thermal polymerization initiator can be used. In addition, instead of the thermal polymerization initiator, a photopolymerization initiator may be used, and a polymerization method using ultraviolet rays or the like may be used.

The content of the resin (a) is usually 50 to 99.9 mass%, preferably 60 to 95 mass%, and more preferably 70 to 90 mass% in 100 mass% of the solid content of the binder composition.

< light selective absorption Compound (B) >

The light selective absorbing compound (B) is a compound having a merocyanine structure in the molecule.

In the present invention, the merocyanine structure refers to a partial structure represented by N-C. In the present invention, the merocyanine structure does not include an indole ring. In the merocyanine structure of the present invention, it is preferable that the merocyanine structure does not include an aromatic condensed ring (e.g., a benzotriazole ring, a benzimidazole ring, an isoindole ring, a quinoline ring, etc.) having all of the partial structures represented by N-C ═ C as ring components other than the indole ring.

The light selective absorbing compound (B) exhibits an absorption maximum at a wavelength of 360nm or more. The light selective absorbing compound (B) preferably exhibits maximum absorption at a wavelength of 360nm or more and 420nm or less, and more preferably exhibits maximum absorption at a wavelength of 370nm or more and 410nm or less. By exhibiting maximum absorption at a wavelength of 360nm or more, light having a wavelength of about 380nm can be efficiently absorbed even when added in a small amount.

The light selective absorbing compound (B) preferably satisfies the following formula (1), and more preferably also satisfies formula (2).

ε(380)≥25 (1)

[ in the formula (1),. epsilon. (. 380) represents the molar absorption coefficient at a wavelength of 380nm of the light selective absorption compound (B). The molar absorptivity was expressed in L/(g.cm). ]

ε(380)/ε(420)≥20 (2)

[ in the formula (2),. epsilon. (380) represents the molar absorption coefficient at a wavelength of 380nm of the light selective absorption compound (B), and. epsilon. (420) represents the molar absorption coefficient at a wavelength of 420nm of the light selective absorption compound (B).

The molar absorptivity was expressed in L/(g.cm). ]

The value of ε (380) is preferably 30L/(g cm) or more, more preferably 35L/(g cm) or more, still more preferably 50L/(g cm) or more, still more preferably 100L/(g cm) or more, and usually 10000L/(g cm) or less. The larger the value of epsilon (380), the more easily the compound absorbs light having a wavelength of 380nm, and the more easily the compound exhibits a function of suppressing deterioration due to ultraviolet rays.

The value of ∈ (380)/∈ (420) of the light selective absorption compound (B) is preferably 25 or more, more preferably 35 or more, still more preferably 50 or more, and particularly preferably 100 or more. An adhesive layer formed from an adhesive composition containing a compound having a large value of ε (380)/ε (420) absorbs ultraviolet light in the vicinity of 380nm without impairing the color expression of a display device. In addition, light degradation of a display device such as an optical film (retardation film) or an organic EL element to be stacked can be suppressed.

Examples of the light selective absorbing compound (B) include compounds having a merocyanine structure described in international publication nos. 2019/073869 and 2019/004046.

The light selective absorbing compound (B) preferably has a structure in which a carbon atom included in the merocyanine structure is bonded to an electron-withdrawing group. Specifically, the light selective absorbing compound (B) preferably has N-C ═ C (R)^Y3) -C ═ C (here, R) partial structure^Y3Represents an electron withdrawing group. ).

Having the formula N-C ═ C (R)^Y3) Examples of the light selective absorbing compound (B) having a partial structure represented by — C ═ C include compounds represented by the following formula (Y).

[ in the formula (Y), R^Y3、R^Y4And R^Y5Each independently represents an electron withdrawing group.

R^Y1And R^Y2Can be used forAre connected to each other to form a ring.

R^Y1And R^Y6May be connected to each other to form a ring.

R^Y4And R^Y5May be connected to each other to form a ring.]

As R^Y3、R^Y4And R^Y5Examples of the electron-withdrawing group include a halogen atom, a nitro group, a cyano group, a carboxyl group, a haloalkyl group, a haloaryl group and-OCF ₃、-SCF₃、-SF₅、-SF₃、-SO₃H、-SO₂H. A group represented by the formula (Y-1).

^*-X¹-R²²² (Y-1)

[ in the formula (Y-1),

X¹represents-CO-, -COO-, -OCO-, -CS-, -CSS-, -COS-, -CSO-, -SO₂-、-NR²²³CO-or-CONR²²⁴-。

R²²²Represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent.

R²²³And R²²⁴Each independently represents a hydrogen atom, a C1-C6 alkyl group or a phenyl group.

Denotes a bond. ]

Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.

Examples of the haloalkyl group include fluoroalkyl groups such as a trifluoromethyl group, perfluoroethyl group, perfluoropropyl group, perfluoroisopropyl group, perfluorobutyl group, perfluorosec-butyl group, perfluorotert-butyl group, perfluoropentyl group, and perfluorohexyl group, and a perfluoroalkyl group is preferable. The carbon number of the haloalkyl group is usually 1 to 25, preferably 1 to 12. The haloalkyl group may be linear or branched.

Examples of the halogenated aryl group include a fluorophenyl group, a chlorophenyl group, a bromophenyl group and the like, a fluoroaryl group is preferable, and a perfluoroaryl group is more preferable. The carbon number of the halogenated aryl group is usually 6 to 18, and preferably 6 to 12.

X¹preferably-COO-or-SO₂-。

As R²²²Examples of the alkyl group having 1 to 25 carbon atoms include straight-chain or branched-chain alkyl groups having 1 to 25 carbon atoms such as a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, a tert-butyl group, a sec-butyl group, a n-pentyl group, a n-hexyl group, a 1-methylbutyl group, a 3-methylbutyl group, a n-octyl group, a n-decyl group, and a 2-hexyl-octyl group. R ²²²Preferably an alkyl group having 1 to 12 carbon atoms.

As R²²²Examples of the substituent that the alkyl group having 1 to 25 carbon atoms may have include a halogen atom and a hydroxyl group.

As R²²²The aromatic hydrocarbon group having 6 to 18 carbon atoms includes aryl groups having 6 to 18 carbon atoms such as phenyl, naphthyl, anthryl and biphenyl groups; aralkyl groups having 7 to 18 carbon atoms such as benzyl, phenylethyl, and naphthylmethyl.

As R²²²Examples of the substituent that the aromatic hydrocarbon group having 6 to 18 carbon atoms may have include a halogen atom and a hydroxyl group.

As R²²³And R²²⁴Examples of the alkyl group having 1 to 6 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, tert-butyl, sec-butyl, n-pentyl, n-hexyl, 1-methylbutyl, and 3-methylbutyl.

R^Y3Preferably nitro, cyano, -F, -OCF₃、-SCF₃、-SF₅、-SF₃、-SO₂-R²²²(R²²²Represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. ) A fluoroalkyl group (preferably a fluoroalkyl group having 1 to 25 carbon atoms) or a fluoroaryl group (preferably a fluoroaryl group having 6 to 18 carbon atoms), more preferably a cyano group, -F, -OCF₃、-SC F₃Or a fluoroalkyl group (preferably a fluoroalkyl group having 1 to 25 carbon atoms), and more preferably a cyano group.

Preferably selected from R ^Y4And R^Y5At least one of which is cyano, nitro, -OCF₃、-SCF₃、-SF₅、-CO-O-R²²²、-SO₂-R²²²(R²²²Represents a hydrogen atom, mayAn alkyl group having 1 to 25 carbon atoms and a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms and optionally having a substituent. ) A fluoroalkyl group (preferably a fluoroalkyl group having 1 to 25 carbon atoms) or a fluoroaryl group (preferably a fluoroaryl group having 6 to 18 carbon atoms). More preferably cyano, nitro, -CO-O-R²²²or-SO₂-R²²²More preferably, a cyano group.

R^Y4And R^Y5Preferably of the same construction.

R^Y4And R^Y5May be bonded to each other to form a ring. R^Y4And R^Y5The rings formed by bonding to each other may be monocyclic or condensed, and monocyclic is preferable. In addition, R^Y4And R^Y5The ring formed by bonding may contain a hetero atom (nitrogen atom, oxygen atom, sulfur atom) or the like as a constituent element of the ring.

R^Y4And R^Y5The ring formed by bonding to each other is usually a three-to ten-membered ring, preferably a five-to seven-membered ring, and more preferably a five-membered ring or a six-membered ring.

As R^Y4And R^Y5The rings formed by bonding to each other include, for example, the following structures.

[ in the formula, a represents a bond to a carbon atom. R^1E～R^16EEach independently represents a hydrogen atom or a substituent.]

R^Y4And R^Y5The ring formed by bonding may have a substituent (R in the above formula)^1E～R^16E)。

As the above-mentioned R ^1E～R^16EExamples of the substituent include: halogen atoms such as fluorine atom, chlorine atom, bromine atom, and iodine atom; alkyl groups having 1 to 12 carbon atoms such as methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, and the like; fluoromethyl, difluoromethyl, trifluoromethyl, 2-fluoroethyl, 2, 2-difluoroethyl, 2,2, 2-trifluoroethyl, 1,2, 2-tetrafluoroethyl, 1,2,2, 2-pentafluoro-ethylA C1-12 haloalkyl group such as an ethyl group; alkoxy having 1 to 12 carbon atoms such as methoxy, ethoxy, propoxy, butoxy, pentoxy, hexoxy, etc.; alkylthio groups having 1 to 12 carbon atoms such as a methylthio group, an ethylthio group, a propylthio group, a butylthio group, a pentylthio group, and a hexylthio group; a fluoroalkoxy group having 1 to 12 carbon atoms such as a monofluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, a 2-fluoroethoxy group, a 1,1,2,2, 2-pentafluoroethoxy group, etc.; amino groups which may be substituted with an alkyl group having 1 to 6 carbon atoms, such as amino, methylamino, ethylamino, dimethylamino, diethylamino, or methylethylamino; an alkylcarbonyloxy group having 2 to 12 carbon atoms such as a methylcarbonyloxy group, an ethylcarbonyloxy group and the like; an alkylsulfonyl group having 1 to 12 carbon atoms such as a methylsulfonyl group and an ethylsulfonyl group; arylsulfonyl groups having 6 to 12 carbon atoms such as phenylsulfonyl groups; a cyano group; a nitro group; a hydroxyl group; a mercapto group; a carboxyl group; -SF ₃；-SF₅And so on.

R is as defined above^1E～R^16EEach independently is preferably an alkyl group having 1 to 12 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, and further preferably a methyl group.

As R^Y1、R^Y2、R^Y6And R^Y7Examples of the aliphatic hydrocarbon group having 1 to 25 carbon atoms include: a straight-chain or branched alkyl group having 1 to 25 carbon atoms such as a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, a tert-butyl group, a sec-butyl group, a n-pentyl group, an isopentyl group, a n-hexyl group, an isohexyl group, a n-octyl group, an isooctyl group, a n-nonyl group, an isononyl group, a n-decyl group, an isodecyl group, a n-dodecyl group, an isododecyl group, an undecyl group, a lauryl group, a myristyl group, a cetyl group, a stearyl group, and the like: cycloalkyl groups having 3 to 25 carbon atoms such as cyclopropyl, cyclobutyl, cyclopentyl and cyclohexyl; cycloalkyl alkyl group having 4 to 25 carbon atoms such as cyclohexylmethyl group, and the like.

R^Y1、R^Y2、R^Y6And R^Y7The aliphatic hydrocarbon group having 1 to 25 carbon atoms is preferably an alkyl group having 1 to 15 carbon atoms, and more preferably an alkyl group having 1 to 12 carbon atoms.

As R^Y1、R^Y2、R^Y6And R^Y7Examples of the substituent which the aliphatic hydrocarbon group having 1 to 25 carbon atoms may have include a halogen atom, a hydroxyl group, a nitro group, a,Cyano, -SO₃H. Mercapto, amino, and the like.

R^Y1、R^Y2、R^Y6And R^Y7-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms ₂-or-CH-may be substituted by-NR^1A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^2A-、-NR^3A-CO-、-S-、-SO-、-CF₂-or-CHF-.

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-CH-or-CH-is substituted, it is preferably substituted by-O-, -S-, -COO-or-SO₂-a permutation.

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH-is replaced by-O-, the aliphatic hydrocarbon group is preferably-O-R¹¹¹(R¹¹¹An alkyl group having 1 to 24 carbon atoms which may have a halogen atom). Further, a polyalkyleneoxy group such as a polyethyleneoxy group or a polypropyleneoxy group may be used.

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH-is replaced by-S-, the aliphatic hydrocarbon group is preferably-S-R¹¹¹(R¹¹¹An alkyl group having 1 to 24 carbon atoms which may have a halogen atom).

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH-is replaced by-COO-, the aliphatic hydrocarbon group is preferably-COO-R¹¹¹(R¹¹¹An alkyl group having 1 to 24 carbon atoms which may have a halogen atom).

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂-or-CH ═ by-SO₂When substituted, the aliphatic hydrocarbon group is preferably-SO₂-R¹¹¹(R¹¹¹An alkyl group having 1 to 24 carbon atoms and optionally having a halogen atom), and may be-SO ₂CHF₂、-SO₂CH₂F, and the like.

As R^Y1、R^Y2、R^Y6And R^Y7The aromatic hydrocarbon group having 6 to 18 carbon atoms includes phenyl and naphthaleneAn anthracene group, a tetracene group, a pentacene group, a phenanthrene group,

Aryl groups having 6 to 18 carbon atoms such as a mesityl group, a triphenylene group, a tetraphenyl group, a pyrenyl group, a perylene group, a coronene group (コロネニル group in Japanese), and a biphenyl group; aralkyl group having 7 to 18 carbon atoms such as benzyl group, phenylethyl group, naphthylmethyl group and the like, preferably aryl group having 6 to 18 carbon atoms, more preferably phenyl group or benzyl group.

As R^Y1、R^Y2、R^Y6And R^Y7Examples of the substituent that the aromatic hydrocarbon group having 6 to 18 carbon atoms may have include a halogen atom; a hydroxyl group; a mercapto group; an amino group; a nitro group; a cyano group; -SO₃H group, etc.

R^Y1、R^Y2、R^Y6And R^Y7-CH contained in an aromatic hydrocarbon group having 6 to 18 carbon atoms₂-or-CH may be substituted by-NR^1A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^2A-、-NR^3A-CO-、-S-、-SO-、-CF₂-or-CHF-.

-CH contained in the C6-18 aromatic hydrocarbon group₂when-or-CH-is substituted, it is preferably substituted by-O-or-SO₂-a permutation.

-CH contained in the C6-18 aromatic hydrocarbon group₂when-or-CH-is substituted by-O-, the aromatic hydrocarbon group is preferably an aryloxy group having 6 to 17 carbon atoms such as a phenoxy group; and aralkyloxy groups such as phenoxyethyl, phenoxydiethylene glycol, and phenoxypolyalkylene glycol.

-CH contained in the C6-17 aromatic hydrocarbon group₂-or-CH ═ by-SO₂When substituted, the aromatic hydrocarbon group is preferably-SO₂-R¹¹²(R¹¹²Represents an aryl group having 6 to 17 carbon atoms or an aralkyl group having 7 to 17 carbon atoms. ) The groups shown.

As R^1A、R^2AAnd R^3AExamples of the alkyl group having 1 to 6 carbon atoms include the group represented by the formula²²³The alkyl groups having 1 to 6 carbon atoms are the same.

As R^Y1、R^Y2、R^Y6And R^Y7Examples of the halogen atom include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like.

As R^Y1、R^Y2、R^Y6And R^Y7Examples of the heterocyclic group include pyridyl, pyrrolidinyl, tetrahydrofurfuryl, tetrahydrothienyl, pyrrolyl, furyl, thienyl (Japanese: チオフェノ yl), piperidyl, tetrahydropyranyl, tetrahydrothiopyranyl, thiopyranyl (Japanese: チアピラニル yl), imidazolinyl (Japanese: イミダゾリノ yl), pyrazolyl, oxazolyl, thiazolyl, dioxanyl, morpholinyl, thiazinyl, triazolyl, tetrazolyl, dioxanyl, pyridazinyl, pyrimidinyl, pyrazinyl, indolyl, isoindolyl, benzimidazolyl, purinyl, benzotriazolyl, quinolyl, isoquinolyl, quinazolinyl, quinoxalinyl, cinnolinyl, pteridinyl, benzopyranyl, anthracenyl, acridinyl, xanthenyl, carbazolyl, tetracenyl, porphinyl, chlorinyl, dihydroporphinyl, corrin (Japanese: コリニル), Aliphatic heterocyclic groups having 3 to 16 carbon atoms such as an adenine group, a guanine group, a cytosine group, a thymine group, a uracil group, a quinolyl group, a thiophenyl group, an imidazolyl group, an oxazolyl group, a thiazolyl group and the like, and aromatic heterocyclic groups having 3 to 16 carbon atoms. R ¹、R²、R⁶And R⁷Each of the heterocyclic groups shown is independently preferably a pyrrolidinyl group, a piperidinyl group, a tetrahydrofurfuryl group, a tetrahydropyranyl group, a tetrahydrothienyl group, a tetrahydrothiopyranyl group or a pyridyl group.

R^Y1And R^Y2The ring formed by bonding to each other contains 1 nitrogen atom as a constituent of the ring. R^Y1And R^Y2The rings formed by bonding to each other may be monocyclic or condensed, and monocyclic is preferable. R^Y1And R^Y2The ring formed by bonding may further include a hetero atom (an oxygen atom, a sulfur atom, a nitrogen atom, etc.) as a constituent element of the ring. R^Y1And R^Y2The ring formed by bonding to each other is preferably a ring having no unsaturated bond.

R^Y1And R^Y2The ring formed by bonding to each other is usually a three-to ten-membered ring, preferably a five-to seven-membered ring, and more preferably a five-membered ring or a six-membered ring.

R^Y1And R^Y2The ring formed by bonding may have a substituent. Examples of the substituent include^1EThe substituents shown are the same.

As R^Y1And R^Y2Examples of the rings formed by bonding to each other include the following rings.

R^Y1And R^Y2Each independently is preferably an alkyl group having 1 to 25 carbon atoms, more preferably an alkyl group having 1 to 12 carbon atoms, still more preferably a linear alkyl group having 1 to 6 carbon atoms, and particularly preferably a methyl group, an ethyl group, an n-propyl group or an n-butyl group.

R^Y6And R^Y7Each independently is preferably an alkyl group having 1 to 25 carbon atoms, more preferably an alkyl group having 1 to 12 carbon atoms, still more preferably a branched alkyl group having 1 to 6 carbon atoms, and particularly preferably an isopropyl group, an isobutyl group, or a tert-butyl group.

Examples of the compound represented by the formula (Y) include a compound represented by the following formula (Y-1) to a compound represented by the following formula (Y-136).

The compound (Y) can be obtained, for example, by reacting a compound represented by the formula (Y-A) (hereinafter sometimes referred to as compound (Y-A)) with a compound represented by the formula (Y-B) (hereinafter sometimes referred to as compound (Y-B)).

[ in the formula, R^Y1～R^Y7The same meaning as above is indicated.]

The reaction of the compound (Y-A) with the compound (Y-B) is usually carried out by mixing the compound (Y-A) with the compound (Y-B), and it is preferable to add the compound (Y-B) to the compound (Y-A).

Further, the reaction of the compound (Y-A) with the compound (Y-B) is preferably carried out by mixing the compound (Y-A) with the compound (Y-B) in the presence of a base and a methylating agent,

it is preferable to mix the compound (Y-A), the compound (Y-B), a base and a methylating agent,

more preferably, the compound (Y-B) and a base are mixed into a mixture of the compound (Y-A) and a methylating agent,

it is further preferable to add a mixture of the compound (Y-B) and a base to a mixture of the compound (Y-A) and a methylating agent.

Examples of the base include metal hydroxides (preferably, alkali metal hydroxides) such as sodium hydroxide, lithium hydroxide, potassium hydroxide, cesium hydroxide, rubidium hydroxide, calcium hydroxide, barium hydroxide hydrate, and magnesium hydroxide; metal alkoxides (preferably alkali metal alkoxides) such as sodium methoxide, potassium methoxide, lithium methoxide, sodium ethoxide, sodium isopropoxide, sodium tert-butoxide, and potassium tert-butoxide; metal hydrides such as lithium hydride, sodium hydride, potassium hydride, lithium aluminum hydride, sodium borohydride, aluminum hydride, and sodium aluminum hydride; metal oxides such as calcium oxide and magnesium oxide; metal carbonates (preferably alkaline earth metal carbonates) such as sodium hydrogen carbonate, sodium carbonate, and potassium carbonate; organic alkyl metal compounds such as n-butyllithium, t-butyllithium, methyllithium and grignard reagents; amine compounds such as ammonia, triethylamine, diisopropylethylamine, ethanolamine, pyrrolidine, piperidine, diazabicycloundecene, diazabicyclononene, guanidine, tetramethylammonium hydroxide, tetraethylammonium hydroxide, pyridine, aniline, dimethoxyaniline, ammonium acetate, and β -alanine (preferably tertiary amines such as triethylamine and diisopropylethylamine); an amino metal compound (preferably an alkali metal amide) such as lithium diisopropylamide, sodium amide, potassium hexamethyldisilazide, or the like; sulfonium compounds such as trimethylsulfonium hydroxide; iodonium compounds such as diphenyliodonium hydroxide; phosphazene bases, and the like.

The amount of the base used is usually 0.1 to 5 mol, preferably 0.5 to 2 mol, based on 1 mol of the compound (Y-A).

Examples of the methylating agent include methyl iodide, dimethyl sulfate, methyl methanesulfonate, methyl fluorosulfonate, methyl p-toluenesulfonate, methyl trifluoromethanesulfonate, and trimethyloxonium tetrafluoroborate.

The amount of the methylating agent used is usually 0.1 to 5.0 mol, preferably 0.5 to 2.0 mol, based on 1 mol of the compound (Y-A).

The reaction time of the compound (Y-A) and the compound (Y-B) is usually 0.1 to 10 hours, preferably 0.2 to 3 hours.

The reaction temperature of the compound (Y-A) and the compound (Y-B) is usually-50 to 150 ℃ and preferably-20 to 100 ℃.

The amount of the compound (Y-B) to be used is usually 0.1 to 10 moles, preferably 0.5 to 5 moles, based on 1 mole of the compound (Y-A).

Examples of the compound (Y-A) include the following compounds.

As the compound (Y-B), commercially available products can be used, and the following compounds and the like can be mentioned.

The compound (Y-A) can be obtained, for example, by reacting a compound represented by the formula (Y-C) (hereinafter sometimes referred to as compound (Y-C)) with a compound represented by the formula (Y-D) (hereinafter sometimes referred to as compound (Y-D)).

[ in the formula (Y-C), R^Y1、R^Y2、R^Y3、R^Y6And R^Y7The same meaning as above is indicated. E₁Represents a leaving group.]

As E₁Examples of the leaving group include a halogen atom, a p-toluenesulfonyl group, a trifluoromethanesulfonyl group and the like.

The reaction of the compound (Y-C) with the compound (Y-D) is carried out by mixing the compound (Y-C) with the compound (Y-D).

The amount of the compound (Y-D) to be used is usually 0.1 to 5 mol, preferably 0.5 to 2 mol, based on 1 mol of the compound (Y-C).

The reaction of the compound (Y-C) with the compound (Y-D) may be carried out in the presence of a solvent. Examples of the solvent include acetonitrile, benzene, toluene, acetone, ethyl acetate, chloroform, dichloroethane, monochlorobenzene, methanol, ethanol, isopropanol, tert-butanol, 2-butanone, tetrahydrofuran, diethyl ether, dimethyl sulfoxide, N-dimethylacetamide, N-dimethylformamide, and water. Acetonitrile, tetrahydrofuran, chloroform, dichloromethane, and diethyl ether are preferable, acetonitrile, tetrahydrofuran, and chloroform are more preferable, and methanol, ethanol, isopropanol, and acetonitrile are even more preferable.

The reaction time of the compound (Y-C) with the compound (Y-D) is usually 0.1 to 10 hours.

The reaction temperature of the compound (Y-C) and the compound (Y-D) is usually-50 to 150 ℃.

Examples of the compound (Y-C) include the compounds described below.

Commercially available compounds (Y-D) can be used. For example, cyanogen chloride, cyanogen bromide, p-toluenesulfonyl cyanide, trifluoromethanesulfonyl cyanide, 1-chloromethyl-4-fluoro-1, 4-diazabicyclo [2.2.2] octane bis (tetrafluoroborate) (also known as Selectfluor (registered trademark of Air Products and Chemicals)), benzoyl (phenyliodo) (trifluoromethanesulfonyl) methanide, 2, 8-difluoro-5- (trifluoromethyl) -5H-dibenzo [ b, d ] thiophen-5-ium trifluoromethanesulfonate, N-bromosuccinimide, N-chlorosuccinimide, N-iodosuccinimide, and the like can be given.

The compound (Y-C) can be obtained by reacting a compound represented by the formula (Y-E) (hereinafter, sometimes referred to as the compound (Y-E)) with a compound represented by the formula (Y-F) (hereinafter, sometimes referred to as the compound (Y-F)).

[ wherein, R^Y1、R^Y2、R^Y6And R^Y7The same meaning as above is indicated.]

The reaction of the compound (Y-E) with the compound (Y-F) is carried out by mixing the compound (Y-E) with the compound (Y-F).

The amount of the compound (Y-F) to be used is usually 0.1 to 5 mol, preferably 0.5 to 2 mol, based on 1 mol of the compound (Y-E).

The reaction of the compound (Y-E) with the compound (Y-F) may be carried out in the presence of a solvent. Examples thereof include acetonitrile, benzene, toluene, acetone, ethyl acetate, chloroform, dichloroethane, monochlorobenzene, methanol, ethanol, isopropanol, tert-butanol, 2-butanone, tetrahydrofuran, diethyl ether, dimethyl sulfoxide, N-dimethylacetamide, N-dimethylformamide, and water. Preferably benzene, toluene, ethanol, acetonitrile.

The reaction time of the compound (Y-E) with the compound (Y-F) is usually 0.1 to 10 hours.

The reaction temperature of the compound (Y-E) and the compound (Y-F) is usually-50 to 150 ℃.

Examples of the compound (Y-E) include the compounds described below.

Examples of the compound (Y-F) include primary amines such as methylamine, ethylamine, ethanolamine, and 4-hydroxybutylamine; secondary amines such as dimethylamine, diethylamine, dibutylamine, pyrrolidine, piperidine, 3-hydroxypyrrolidine and 4-hydroxypiperidine.

The light selective absorbing compound (B) is also preferably a compound having a part of the merocyanine structure as a ring component. Examples of the compound having a part of the merocyanine structure as a constituent of the ring include compounds having a carbon-carbon bond structure part in the merocyanine structure as a constituent of the ring.

Examples of the light selective absorbing compound (B) having a part of the merocyanine structure as a ring component include compounds having a partial structure represented by the following formula (X) (hereinafter, may be referred to as compound (X)).

[ in the formula (X), the ring W¹Represents a ring structure having at least 1 double bond as a ring constituent and having no aromatic character.

R³Represents a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group, -SF ₅、-SF₃、-SO₃H、-SO₂H. An aliphatic hydrocarbon group having 1 to 25 carbon atoms which may have a substituent or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-, -CH-may be substituted by-O-, -S-, -NR^1xA-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2xA-、-NR^3xA-CO-、-O-CO-NR^4xA-、-NR^5xA-CO-O-、-NR^6xA-CO-NR^7xA-、-CO-S-、-S-CO-S-、-S-CO-NR^8xA-、-NR^9xA-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10xA-CS-、-NR^11xA-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-。

Ring W¹The ring is not particularly limited as long as it has 1 or more double bonds as a constituent of the ring and is not aromatic. Ring W¹May be a single ring or a condensed ring.

Ring W¹The heterocyclic ring may contain a hetero atom (for example, an oxygen atom, a sulfur atom, a nitrogen atom, or the like) as a constituent element of the ring, or may be an aliphatic hydrocarbon ring formed of a carbon atom and a hydrogen atom.

Ring W¹Having 1 or more double bonds as a constituent of the ring, ring W¹The number of double bonds contained in (1) is usually 1 to 4, preferably 1 to 3, more preferably 1 or 2, and still more preferably 1.

Ring W¹The ring is usually a ring having 5 to 18 carbon atoms, preferably a five-to seven-membered ring structure, and more preferably a six-membered ring structure.

Ring W¹Preferably a single ring.

Ring W¹May have a substituent. Examples of the substituent include: halogen atoms such as fluorine atom, chlorine atom, bromine atom, and iodine atom; alkyl groups having 1 to 12 carbon atoms such as methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, and the like; a halogenated alkyl group having 1 to 12 carbon atoms such as a fluoromethyl group, a difluoromethyl group, a trifluoromethyl group, a 2-fluoroethyl group, a 2, 2-difluoroethyl group, a 2,2, 2-trifluoroethyl group, a 1,1,2, 2-tetrafluoroethyl group, a 1,1,2,2, 2-pentafluoroethyl group and the like; alkoxy having 1 to 12 carbon atoms such as methoxy, ethoxy, propoxy, butoxy, pentoxy, hexoxy, etc.; methylthio, ethylthio, propylthio, butyl Alkylthio groups having 1 to 12 carbon atoms such as a thio group, a pentylthio group, and a hexylthio group; a fluoroalkoxy group having 1 to 12 carbon atoms such as a monofluoromethoxy group, a difluoromethoxy group, a trifluoromethoxy group, a 2-fluoroethoxy group, a 1,1,2,2, 2-pentafluoroethoxy group, etc.; amino groups which may be substituted with an alkyl group having 1 to 6 carbon atoms, such as amino, methylamino, ethylamino, dimethylamino, diethylamino, or methylethylamino; an alkylcarbonyloxy group having 2 to 12 carbon atoms such as a methylcarbonyloxy group, an ethylcarbonyloxy group and the like; an alkylsulfonyl group having 1 to 12 carbon atoms such as a methylsulfonyl group and an ethylsulfonyl group; arylsulfonyl groups having 6 to 12 carbon atoms such as phenylsulfonyl groups; a cyano group; a nitro group; a hydroxyl group; a mercapto group; a carboxyl group; -SF₃；-SF₅And the like.

Ring W¹The substituent(s) that may be present is preferably an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an alkylthio group having 1 to 12 carbon atoms, or an amino group that may be substituted with an alkyl group having 1 to 6 carbon atoms.

As a ring W¹Examples thereof include the following groups.

[ in the formula, a 1 represents a bond to a nitrogen atom, and a 2 represents a bond to a carbon atom. ]

As R³Examples of the heterocyclic group include the heterocyclic group represented by the formula (Y) and R^Y1The heterocyclic groups shown are the same groups.

R³The heterocyclic group shown is preferably a pyrrolidinyl group, a piperidinyl group, a tetrahydrofurfuryl group, a tetrahydropyranyl group, a tetrahydrothienyl group, a tetrahydrothiopyranyl group, or a pyridyl group.

As R³The aliphatic hydrocarbon group having 1 to 25 carbon atoms includes a group represented by the formula (Y) and R^Y1The aliphatic hydrocarbon groups having 1 to 25 carbon atoms are the same.

R³The aliphatic hydrocarbon group having 1 to 25 carbon atoms is preferablyIs an alkyl group having 1 to 15 carbon atoms, more preferably an alkyl group having 1 to 12 carbon atoms.

As R³Examples of the substituent which the aliphatic hydrocarbon group may have include a halogen atom, a hydroxyl group, a nitro group, a cyano group and-SO₃H, and the like.

R³-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂-or-CH-may be substituted by-O-, -S-, -NR^1xA-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2xA-、-NR^3xA-CO-、-O-CO-NR^4xA-、-NR^5xA-CO-O-、-NR^6xA-CO-NR^7xA-、-CO-S-、-S-CO-S-、-S-CO-NR^8xA-、-NR^9xA-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10xA-CS-、-NR^11xA-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-。

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-CH-or-CH-is substituted, it is preferably substituted by-O-, -S-, -CO-O-or-SO%₂-a permutation.

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH-is substituted by-O-, an alkoxy group represented by-O-R (R is an alkyl group having 1 to 24 carbon atoms which may have a halogen atom), a polyethylene glycol or a polypropylene glycol is preferable.

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH-is substituted by-S-, it is preferably an alkylthio group represented by-S-R (R is an alkyl group having 1 to 24 carbon atoms which may have a halogen atom).

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH-is replaced by-COO-, it is preferably-COO-R¹¹¹(R¹¹¹An alkyl group having 1 to 24 carbon atoms which may have a halogen atom).

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂-or-CH ═ by-SO₂In the case of replacement, it is preferably-SO₂-R¹¹²(R¹¹²An alkyl group having 1 to 24 carbon atoms which may have a halogen atom).

As R^1xA、R^2xA、R^3xA、R^4xA、R^5xA、R^6xA、R^7xA、R^8xA、R^9xA、R^10xAAnd R^11xAExamples of the alkyl group having 1 to 6 carbon atoms include the alkyl group represented by the formula (Y) and R^1AThe alkyl groups having 1 to 6 carbon atoms are the same.

As R³The aromatic hydrocarbon group having 6 to 18 carbon atoms includes R in the formula (Y)^Y1The aromatic hydrocarbon groups having 6 to 18 carbon atoms are the same.

R³The aromatic hydrocarbon group having 6 to 18 carbon atoms is preferably an aryl group having 6 to 18 carbon atoms, and more preferably a phenyl group or a benzyl group.

As R³Examples of the substituent that the aromatic hydrocarbon group having 6 to 25 carbon atoms may have include a halogen atom; a hydroxyl group; a mercapto group; an amino group; a nitro group; a cyano group; -SO₃H group, etc.

R³-CH contained in an aromatic hydrocarbon group having 6 to 18 carbon atoms₂-or-CH-may be substituted by-O-, -S-, -NR^1xA-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2xA-、-NR^3xA-CO-、-O-CO-NR^4xA-、-NR^5xA-CO-O-、-NR^6xA-CO-NR^7xA-、-CO-S-、-S-CO-S-、-S-CO-NR^8xA-、-NR^9xA-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10xA-CS-、-NR^11xA-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO ₂-。

-CH contained in the C6-18 aromatic hydrocarbon group₂when-or-CH-is replaced with-O-, it is preferably an aryloxy group having 6 to 26 carbon atoms such as phenoxy group.

-CH contained in the C6-18 aromatic hydrocarbon group₂-or-CH-by-SO₂In the case of replacement, it is preferably-SO₂-R (R represents an aryl group having 6 to 18 carbon atoms or a 7 carbon atom-18 aralkyl groups. ) The groups shown.

R³Preferably nitro; a cyano group; a halogen atom; -OCF₃；-SCF₃；-SF₅；-SF₃(ii) a A fluoroalkyl group having 1 to 25 carbon atoms; a fluoroaryl group having 6 to 18 carbon atoms; -CO-O-R^111xAor-SO₂-R^112xA(R^111xAAnd R^112xAEach independently represents an alkyl group having 1 to 24 carbon atoms which may have a halogen atom),

more preferably a cyano group; a fluorine atom; a chlorine atom; -OCF₃；-SCF₃(ii) a A C1-12 fluoroalkyl group; -CO-O-R^111xAor-SO₂-R^112xA(R^111xAAnd R^112xAEach independently represents an alkyl group having 1 to 24 carbon atoms which may have a halogen atom),

cyano is particularly preferred.

The molecular weight of the compound (X) is preferably 2500 or less, more preferably 2000 or less, still more preferably 1500 or less, and particularly preferably 1000 or less. Further, it is preferably 100 or more, 150 or more, or 200 or more.

The compound (X) may be a homopolymer or a copolymer as long as the molecular weight is 3000 or less, but is preferably a monomer.

The compound (X) is preferably any one of a compound represented by formula (I) to a compound represented by formula (VIII), and more preferably a compound represented by formula (I).

[ formula (I) to formula (VIII), ring W¹And R³The same meaning as above is indicated.

R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²And R¹¹²Each independently represents a hydrogen atom, a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group, -SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH may be substituted by-NR^12A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^13A-、-NR^14A-CO-、-S-、-SO-、-CF₂-or-CHF-.

R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³Each independently represents a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group or-SF ₅、-SF₃、-SO₃H、-SO₂H. An aliphatic hydrocarbon group having 1 to 25 carbon atoms which may have a substituent or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH-may be substituted by-O-, -S-, -NR-^1A-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2A-、-NR^3A-CO-、-O-CO-NR^4A-、-NR^5A-CO-O-、-NR^6A-CO-NR^7A-、-CO-S-、-S-CO-S-、-S-CO-NR^8A-、-NR^9A-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10A-CS-、-NR^11A-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-。

R^1A、R^2A、R^3A、R^4A、R^5A、R^6A、R^7A、R^8A、R^9A、R^10A、R^11A、R^12A、R^13AAnd R^14AEach independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

R¹And R²May be bonded to each other to form a ring.

R⁴¹And R⁴²May be bonded to each other to form a ring.

R⁵¹And R⁵²May be bonded to each other to form a ring.

R⁶¹And R⁶²May be bonded to each other to form a ring.

R⁹¹And R⁹²May be bonded to each other to form a ring.

R¹⁰¹And R¹⁰²May be bonded to each other to form a ring.

R¹¹¹And R¹¹²May be bonded to each other to form a ring.

R²And R³May be bonded to each other to form a ring.

R¹²And R¹³May be bonded to each other to form a ring.

R⁴²And R⁴³May be bonded to each other to form a ring.

R⁵²And R⁵³May be bonded to each other to form a ring.

R⁶²And R⁶³May be bonded to each other to form a ring.

R⁷²And R⁷³May be bonded to each other to form a ring.

R⁸²And R⁸³May be bonded to each other to form a ring.

R⁹²And R⁹³May be bonded to each other to form a ring.

R¹⁰²And R¹⁰³May be bonded to each other to form a ring.

R¹¹²And R¹¹³May be bonded to each other to form a ring.

R⁴And R⁵May be bonded to each other to form a ring.

R¹⁴And R¹⁵May be bonded to each other to form a ring.

R²⁴And R²⁵May be bonded to each other to form a ring.

R³⁴And R³⁵May be bonded to each other to form a ring.

R⁷⁴And R⁷⁵May be bonded to each other to form a ring.

R⁸⁴And R⁸⁵May be bonded to each other to form a ring.

R⁶And R⁸Each independently represents a divalent linking group.

R⁷Represents a single bond or a divalent linking group.

R⁹And R¹⁰Each independently represents a trivalent linking group.

R¹¹Represents a tetravalent linker.]

Ring W²Ring W³Ring W⁴Ring W⁵Ring W⁶Ring W⁷Ring W⁸Ring W⁹Ring W¹⁰Ring W¹¹And a ring W¹²Each independently is not particularly limited as long as it is a ring having 1 or more double bonds as a constituent of the ring. Ring W²Ring W¹²Each may be a monocyclic ring or a condensed ring. In addition, a ring W²Ring W¹²Can be fatAliphatic rings may also be aromatic rings.

Ring W²Ring W¹²May be a heterocyclic ring containing a hetero atom (for example, an oxygen atom, a sulfur atom, a nitrogen atom, etc.) as a constituent element of the ring.

Ring W²Ring W¹²Having 1 or more double bonds as a constituent of the ring, ring W²Ring W¹²The double bonds contained in (a) are each independently usually 1 to 4, preferably 1 to 3, more preferably 1 or 2, and still more preferably 1.

Ring W²Ring W¹²Each independently is a ring having usually 5 to 18 carbon atoms, preferably a five-to seven-membered ring structure, and more preferably a six-membered ring structure.

Ring W²Ring W¹²Each independently is preferably a single ring. In addition, a ring W²Ring W¹²Each independently is preferably a ring having no aromatic character.

Ring W²Ring W¹²May have a substituent. Examples of the substituent include a group bonded to the ring W¹The same substituents may be present.

As a ring W²Ring W¹²The substituent that may be present is preferably an alkyl group having 1 to 12 carbon atoms, an alkoxy group having 1 to 12 carbon atoms, an alkylthio group having 1 to 12 carbon atoms, or an amino group that may be substituted with an alkyl group having 1 to 6 carbon atoms.

As a ring W²Ring W¹²Specific examples of (3) include¹The same as the specific examples in (1).

Ring W¹¹¹Is a ring containing 2 nitrogen atoms as a constituent of the ring. Ring W¹¹¹The ring may be a single ring or a condensed ring, and is preferably a single ring.

Ring W¹¹¹Generally a five-to ten-membered ring, preferably a five-to seven-membered ring, more preferably a five-or six-membered ring.

Ring W¹¹¹May have a substituent. As a ring W¹¹¹Examples of the substituent which may be contained include: a hydroxyl group; a mercapto group; a formyl group; alkyl groups having 1 to 6 carbon atoms such as methyl group and ethyl group; methoxy, ethoxy, etc. having 1 to up to 1 carbon atoms An alkoxy group of 6; alkylthio groups having 1 to 6 carbon atoms such as methylthio and ethylthio; amino groups which may be substituted with an alkyl group having 1 to 6 carbon atoms, such as amino, methylamino, dimethylamino, and methylethylamino; -CONR^1fR^2f(R^1fAnd R^2fEach independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ) (ii) a -COSR^3f(R^3fRepresents an alkyl group having 1 to 6 carbon atoms. ) (ii) a -CSSR^4f(R^4fRepresents an alkyl group having 1 to 6 carbon atoms. ) (ii) a -CSOR^5f(R^5fRepresents an alkyl group having 1 to 6 carbon atoms. ) (ii) a -SO₂R^6f(R^5fRepresents an aryl group having 6 to 12 carbon atoms or an alkyl group having 1 to 6 carbon atoms which may have a fluorine atom. ) And the like.

As a ring W¹¹¹Examples thereof include the following rings.

Ring W¹¹²And a ring W¹¹³Each independently is a ring containing 1 nitrogen atom as a constituent of the ring. Ring W¹¹²And a ring W¹¹³Each independently may be a monocyclic ring or a fused ring, and is preferably a monocyclic ring.

Ring W¹¹²And a ring W¹¹³Each independently is typically a five to ten membered ring, preferably a five to seven membered ring, more preferably a five or six membered ring.

Ring W¹¹²And a ring W¹¹³May have a substituent. As a ring W¹¹²And a ring W¹¹³Examples of the substituent which may be present include a substituent bonded to the ring W¹The same substituents as in (1).

As a ring W¹¹²And a ring W¹¹³Examples thereof include the following rings.

As R⁴、R¹⁴、R²⁴、R³⁴、R⁴⁴、R⁵⁴、R⁶⁴、R⁷⁴、R⁸⁴、R⁹⁴、R¹⁰⁴、R¹¹⁴、R⁵、R¹⁵、R²⁵、R³⁵、R⁷⁵And R⁸⁵The electron-withdrawing group is represented by R in the formula (Y) ^Y3The same groups.

As R⁴、R¹⁴、R²⁴、R³⁴、R⁴⁴、R⁵⁴、R⁶⁴、R⁷⁴、R⁸⁴、R⁹⁴、R¹⁰⁴、R¹¹⁴、R⁵、R¹⁵、R²⁵、R³⁵、R⁷⁵And R⁸⁵The electron-withdrawing groups are preferably nitro, cyano, halogen atoms, -OCF₃、-SCF₃、-SF₅、-SF₃Fluoroalkyl (preferably having 1 to 25 carbon atoms), fluoroaryl (preferably having 6 to 18 carbon atoms), -CO-O-R²²²、-SO₂-R²²²or-CO-R²²²(R²²²Represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. ),

more preferably nitro, cyano, fluorine atom, chlorine atom, -OCF₃、-SCF₃Fluoroalkyl, -CO-O-R²²²or-SO₂-R²²²(R²²²Represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. ) More preferably, a cyano group.

Preferably R⁴And R⁵At least one of them is cyano, more preferably R⁴Is cyano and R⁵Is cyano, -CO-O-R²²²or-SO₂-R²²²(R²²²Each independently represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a halogen atom, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a halogen atom. ).

R⁴And R⁵Examples of the ring formed by bonding to each other include a ring bonded to R in the formula (Y)^Y4And R^Y5And rings which are bonded to each other to form the same ring.

R⁴And R⁵The ring formed by bonding to each other is usually a three-to ten-membered ring, preferably a five-to seven-membered ring, and more preferably a five-membered ring or a six-membered ring.

As R⁴And R⁵The rings formed by bonding to each other include, for example, the following structures.

R⁴And R⁵The ring formed by bonding may have a substituent (R in the above formula)^1E～R^16E). Examples of the substituent include a group related to the ring W¹The same substituents may be present. R is as defined above^1E～R^16EEach independently is preferably an alkyl group having 1 to 12 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, and further preferably a methyl group.

R¹⁴And R¹⁵Examples of the ring formed by bonding to each other include⁴And R⁵And rings which are bonded to each other to form the same ring.

R²⁴And R²⁵Examples of the ring formed by bonding to each other include⁴And R⁵And rings which are bonded to each other to form the same ring.

R³⁴And R³⁵Examples of the ring formed by bonding to each other include⁴And R⁵And rings which are bonded to each other to form the same ring.

R⁷⁴And R⁷⁵Examples of the ring formed by bonding to each other include⁴And R⁵And rings which are bonded to each other to form the same ring.

R⁸⁴And R⁸⁵Examples of the ring formed by bonding to each other include⁴And R⁵And rings which are bonded to each other to form the same ring.

As R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²、R¹¹²、R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³Examples of the heterocyclic group include the heterocyclic group represented by the formula (Y) and R^Y1The heterocyclic groups shown are the same groups.

R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²、R¹¹²、R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³Each of the heterocyclic groups shown is independently preferably a pyrrolidinyl group, a piperidinyl group, a tetrahydrofurfuryl group, a tetrahydropyranyl group, a tetrahydrothienyl group, a tetrahydrothiopyranyl group or a pyridyl group.

As R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²、R¹¹²、R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³The aliphatic hydrocarbon group having 1 to 25 carbon atoms includes R in the formula (Y)^Y1The aliphatic hydrocarbon groups having 1 to 25 carbon atoms are the same.

The aliphatic hydrocarbon group having 1 to 25 carbon atoms is preferably an alkyl group having 1 to 15 carbon atoms, and more preferably an alkyl group having 1 to 12 carbon atoms.

As R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²、R¹¹²、R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³Examples of the substituent which the aliphatic hydrocarbon group may have include a halogen atom, a hydroxyl group, a nitro group, a cyano group and-SO₃H, and the like.

In addition, R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²、R¹¹²-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂-or-CH may be substituted by-NR^12A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^13A-、-NR^14A-CO-、-S-、-SO-、-CF₂-or-CHF-.

R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂-or-CH-may be substituted by-O-, -S-, -NR^1A-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2A-、-NR^3A-CO-、-O-CO-NR^4A-、-NR^5A-CO-O-、-NR^6A-CO-NR^7xA-、-CO-S-、-S-CO-S-、-S-CO-NR^8A-、-NR^9A-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10A-CS-、-NR^11A-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-。

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH is substitutedPreferably by-O-, -S-, -CO-O-or-SO₂-a permutation.

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂When — or — CH is replaced with — O —, the aliphatic hydrocarbon group is preferably an alkoxy group represented by — O-R '(R' is an alkyl group having 1 to 24 carbon atoms which may have a halogen atom).

Further, it may be a polyalkyleneoxy group such as a polyethyleneoxy group or a polypropyleneoxy group. Examples of the alkoxy group represented by-O-R' include methoxy, ethoxy and-OCF₃And the like.

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH-is replaced by-S-, the aliphatic hydrocarbon group is preferably an alkylthio group represented by-S-R '(R' is an alkyl group having 1 to 24 carbon atoms which may have a halogen atom). Further, a polyalkylene sulfide group such as a polyethylene sulfide group or a polypropylene sulfide group may be used. Examples of the alkylthio group represented by-S-R' include a methylthio group, an ethylthio group and-SCF₃Poly (ethylenethio), poly (propylenylthio), and the like.

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂when-or-CH-is substituted by-COO-, the aliphatic hydrocarbon group is preferably a group represented by-COO-R '(R' is an alkyl group having 1 to 24 carbon atoms which may have a halogen atom).

-CH contained in the aliphatic hydrocarbon group having 1 to 25 carbon atoms₂-or-CH ═ by-SO₂When substituted, the aliphatic hydrocarbon group is preferably-SO₂R '(R' is an alkyl group having 1 to 24 carbon atoms and may have a halogen atom), and may be-SO₂CHF₂Radical, -SO ₂CH₂F radicals and the like.

For R^1A、R^2AAnd R^3AThe same as the description of the formula (Y).

As R^4A、R^5A、R^6A、R^7A、R^8A、R^9A、R^10A、R^11A、R^12A、R^13AAnd R^14AExamples of the alkyl group having 1 to 6 carbon atoms include the alkyl group represented by the formula (Y) and R^1AThe alkyl groups having 1 to 6 carbon atoms are the same.

As R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²、R¹¹²、R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³The aromatic hydrocarbon group having 6 to 18 carbon atoms includes R in the formula (Y)^Y1The same aromatic hydrocarbon group having 6 to 18 carbon atoms is preferably aryl having 6 to 18 carbon atoms, more preferably phenyl or benzyl.

Examples of the substituent that the aromatic hydrocarbon group having 6 to 18 carbon atoms may have include a halogen atom; a hydroxyl group; a mercapto group; an amino group; a nitro group; a cyano group; -SO₃H group, etc.

R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²、R¹¹²-CH contained in an aromatic hydrocarbon group having 6 to 18 carbon atoms₂-or-CH may be substituted by-NR^12A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^13A-、-NR^14A-CO-、-S-、-SO-、-CF₂-or-CHF-.

R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³-CH contained in an aromatic hydrocarbon group having 6 to 18 carbon atoms₂-or-CH-may be substituted by-O-, -S-, -NR^1A-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2A-、-NR^3A-CO-、-O-CO-NR^4A-、-NR^5A-CO-O-、-NR^6A-CO-NR^7A-、-CO-S-、-S-CO-S-、-S-CO-NR^8A-、-NR^9A-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10A-CS-、-NR^11A-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-。

-CH contained in the C6-18 aromatic hydrocarbon group₂-or-CH ═ by-SO₂When substituted, the aromatic hydrocarbon group is preferably-SO₂-R "(R" represents an aryl group having 6 to 17 carbon atoms or an aralkyl group having 7 to 17 carbon atoms).

R²And R³May be connected to each other to form a ring. As R²And R³The constituent elements of the ring formed by joining include the ring W¹The double bond of (a). I.e. from R²And R³Connected to form a ring and a ring W¹Forming a fused ring. As R²And R³Connected to form a ring and a ring W¹Specific examples of the condensed ring to be formed include the ring structures described below.

R¹²And R¹³Examples of the ring formed by bonding to each other include²And R³And rings which are bonded to each other to form the same ring.

R⁴²And R⁴³Examples of the ring formed by bonding to each other include²And R³And rings which are bonded to each other to form the same ring.

R⁵²And R⁵³Examples of the ring formed by bonding to each other include²And R³And rings which are bonded to each other to form the same ring.

R⁶²And R⁶³Examples of the ring formed by bonding to each other include²And R³And rings which are bonded to each other to form the same ring.

R⁷²And R⁷³Examples of the ring formed by bonding to each other include²And R³And rings which are bonded to each other to form the same ring.

R⁸²And R⁸³Examples of the ring formed by bonding to each other include ²And R³The rings are bonded to each other to form the same ring.

R⁹²And R⁹³Examples of the ring formed by bonding to each other include²And R³And rings which are bonded to each other to form the same ring.

R¹⁰²And R¹⁰³Examples of the ring formed by bonding to each other include²And R³And rings which are bonded to each other to form the same ring.

R¹¹²And R¹¹³Examples of the ring formed by bonding to each other include²And R³And rings which are bonded to each other to form the same ring.

R¹And R²Examples of the ring formed by bonding to each other include a ring bonded to R in the formula (Y)^Y1And R^Y2And rings which are bonded to each other to form the same ring.

R¹And R²The ring formed by bonding to each other is usually a three-to ten-membered ring, preferably a five-to seven-membered ring, and more preferably a five-membered ring or a six-membered ring.

R¹And R²The rings formed by bonding may have a substituent, and examples thereof include a ring W²Ring W¹²The same substituents may be present.

R⁴¹And R⁴²Examples of the ring formed by bonding to each other include¹And R²And rings which are bonded to each other to form the same ring.

R⁵¹And R⁵²Examples of the ring formed by bonding to each other include¹And R²And rings which are bonded to each other to form the same ring.

R⁶¹And R⁶²Examples of the ring formed by bonding to each other include¹And R²And rings which are bonded to each other to form the same ring.

R⁹¹And R⁹²Examples of the ring formed by bonding to each other include ¹And R²And rings which are bonded to each other to form the same ring.

R¹⁰¹And R¹⁰²Examples of the ring formed by bonding to each other include¹And R²And rings which are bonded to each other to form the same ring.

R¹¹¹And R¹¹²Examples of the ring formed by bonding to each other include¹And R²And rings which are bonded to each other to form the same ring.

As R⁶、R⁷And R⁸The divalent linking group is a divalent aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a substituent, or a divalent aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. -CH contained in the divalent aliphatic hydrocarbon group and divalent aromatic hydrocarbon group₂May be substituted by-O-, -S-, -NR^1B-(R^1BHydrogen atom or C1-6 alkyl group), -CO-, -SO₂-、-SO-、-PO₃-permuted.

Examples of the substituent that the divalent aliphatic hydrocarbon group and the divalent aromatic hydrocarbon group may have include a halogen atom, a hydroxyl group, a carboxyl group, an amino group, and the like.

R⁶、R⁷And R⁸The divalent linking groups are each independently preferably a divalent aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a substituent, and more preferably a divalent aliphatic hydrocarbon group having 1 to 12 carbon atoms which may have a substituent.

As R⁶、R⁷And R⁸Specific examples of the divalent linking group include the following linking groups. Wherein denotes a bond.

R⁶And R⁷Each independently preferably represents a divalent aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a substituent or a linking group represented by the following formula, and more preferably represents a divalent aliphatic hydrocarbon group having 1 to 12 carbon atoms which may have a substituent or a linking group represented by the following formula. Wherein denotes a bond.

R⁸The aliphatic hydrocarbon group is preferably a divalent aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a substituent or a linking group represented by the following formula. Wherein denotes a bond.

As R⁹And R¹⁰The trivalent linking groups each independently include a trivalent aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a substituent, or a trivalent aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. -CH contained in the trivalent aliphatic hydrocarbon group₂May be substituted by-O-, -S-, -CS-, -CO-, -SO-, -NR-, -C-O-C-C^11B-(R^11BRepresents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ) And (4) replacement.

Examples of the substituent that the trivalent aliphatic hydrocarbon group and the trivalent aromatic hydrocarbon group may have include a halogen atom, a hydroxyl group, a carboxyl group, an amino group, and the like.

R⁹And R¹⁰The trivalent linking groups are preferably trivalent aliphatic hydrocarbon groups having 1 to 12 carbon atoms, each of which may have a substituent.

As R⁹And R¹⁰Specific examples of the trivalent linking group include the linking groups described below. Wherein denotes a bond.

As R¹¹Examples of the tetravalent linking group include a tetravalent aliphatic hydrocarbon group having 1 to 18 carbon atoms which may have a substituent, or a tetravalent aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. -CH contained in the tetravalent aliphatic hydrocarbon group₂May be substituted by-O-, -S-, -CS-, -CO-, -SO-, -NR-, -C-O-C-C^11C-(R^11CRepresents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms. ) And (4) replacement.

Examples of the substituent that the tetravalent aliphatic hydrocarbon group and the tetravalent aromatic hydrocarbon group may have include a halogen atom, a hydroxyl group, a carboxyl group, an amino group, and the like.

R¹¹The tetravalent linking groups are preferably tetravalent aliphatic hydrocarbon groups having 1 to 12 carbon atoms, which may have a substituent.

As R¹¹Specific examples of the tetravalent linker include the following linkers. Wherein denotes a bond.

R¹Preferably an alkyl group having 1 to 15 carbon atoms, more preferably an alkyl group having 1 to 10 carbon atoms.

R²Preferably an alkyl group having 1 to 15 carbon atoms, more preferably a carbon atom1 to 10 alkyl groups.

R¹And R²The compound preferably forms a ring by linking with each other, more preferably forms an aliphatic ring, still more preferably an aliphatic ring having no unsaturated bond, and particularly preferably has a pyrrolidine ring or piperidine ring structure.

R³Preferably nitro, cyano, halogen atoms, -OCF₃、-SCF₃、-SF₅、-SF₃Fluoroalkyl (preferably having 1 to 25 carbon atoms), fluoroaryl (preferably having 6 to 18 carbon atoms), -CO-O-R^111Aor-SO₂-R^112A(R^111AAnd R^112AEach independently represents an alkyl group having 1 to 24 carbon atoms. ),

more preferably a cyano group, a fluorine atom, a chlorine atom, -OCF₃、-SCF₃Fluoroalkyl, -CO-O-R^111Aor-SO₂-R^112A(R^111AAnd R^112AEach independently represents an alkyl group having 1 to 24 carbon atoms which may have a halogen atom. ) More preferred is a cyano group or a fluorine atom, and particularly preferred is a cyano group.

R⁴And R⁵Each independently of the others is preferably nitro, cyano, halogen atom, -OCF₃、-SCF₃、-SF₅、-SF₃Fluoroalkyl, fluoroaryl, -CO-O-R²²²or-SO₂-R²²²(R²²²Represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. ),

more preferably nitro, cyano, fluorine atom, chlorine atom, -OCF₃、-SCF₃Fluoroalkyl, -CO-O-R²²²or-SO₂-R²²²(R²²²Represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. ),

further preferred is cyano, -CO-O-R²²²or-SO₂-R²²²(R²²²Represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. ) Particularly preferred is cyanogen And (4) a base.

Preferably R⁴And R⁵At least one of them is cyano, more preferably R⁴Is cyano and R⁵Is cyano, -CO-O-R²²²or-SO₂-R²²²(R²²²Represents a hydrogen atom, an alkyl group having 1 to 25 carbon atoms which may have a substituent, or an aromatic hydrocarbon group having 6 to 18 carbon atoms which may have a substituent. ).

R⁴And R⁵Preferably of the same construction.

R⁴And R⁵Preferably both cyano groups.

R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹And R¹¹¹Each independently preferably an alkyl group having 1 to 15 carbon atoms, more preferably an alkyl group having 1 to 10 carbon atoms.

R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²And R¹¹²Each independently preferably an alkyl group having 1 to 15 carbon atoms, more preferably an alkyl group having 1 to 10 carbon atoms.

Preferably, R is⁴¹And R⁴²The compound preferably forms a ring by linking with each other, more preferably forms an aliphatic ring, still more preferably an aliphatic ring having no unsaturated bond, and particularly preferably has a pyrrolidine ring or piperidine ring structure.

Preferably, R is⁵¹And R⁵²The compound preferably forms a ring by linking with each other, more preferably forms an aliphatic ring, still more preferably an aliphatic ring having no unsaturated bond, and particularly preferably has a pyrrolidine ring or piperidine ring structure.

Preferably, R is⁶¹And R⁶²The compound preferably forms a ring by linking with each other, more preferably forms an aliphatic ring, still more preferably an aliphatic ring having no unsaturated bond, and particularly preferably has a pyrrolidine ring or piperidine ring structure.

Preferably, R is⁹¹And R⁹²Preferably linked to each other to form a ring, more preferably an aliphatic ring, still more preferably an aliphatic ring having no unsaturated bond, and particularly preferably a pyrrolidine ring or piperidine ringAnd (5) structure.

Preferably, R is¹⁰¹And R¹⁰²The compound preferably forms a ring by linking with each other, more preferably forms an aliphatic ring, still more preferably an aliphatic ring having no unsaturated bond, and particularly preferably has a pyrrolidine ring or piperidine ring structure.

Preferably, R is¹¹¹And R¹¹²The compound preferably forms a ring by linking with each other, more preferably forms an aliphatic ring, still more preferably an aliphatic ring having no unsaturated bond, and particularly preferably has a pyrrolidine ring or piperidine ring structure.

R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³And R¹¹³Each independently is preferably nitro; a cyano group; a halogen atom; -OCF₃；-SCF₃；-SF₅；-SF₃(ii) a A fluoroalkyl group having 1 to 25 carbon atoms; a fluoroaryl group having 6 to 18 carbon atoms; -CO-O-R^111Aor-SO₂-R^112A(R^111AAnd R^112AEach independently represents an alkyl group having 1 to 24 carbon atoms which may have a halogen atom. ),

more preferably a cyano group; a fluorine atom; a chlorine atom; -OCF₃；-SCF₃(ii) a A C1-12 fluoroalkyl group; -CO-O-R^111Aor-SO₂-R^112A(R^111AAnd R^112AEach independently represents an alkyl group having 1 to 24 carbon atoms which may have a halogen atom. ),

cyano is particularly preferred.

R¹⁴、R²⁴、R³⁴、R⁴⁴、R⁵⁴、R⁶⁴、R⁷⁴、R⁸⁴、R⁹⁴、R¹⁰⁴、R¹¹⁴、R¹⁵、R²⁵、R³⁵、R⁷⁵And R⁸⁵Each independently of the others is preferably nitro, cyano, halogen atom, -OCF ₃、-SCF₃、-SF₅、-SF₃、-CO-O-R²²²、-SO₂-R²²²(R²²²An alkyl group having 1 to 25 carbon atoms which may have a halogen atom), a carbon atom1 to 25 fluoroalkyl groups or 6 to 18 carbon fluoroaryl groups,

more preferably a nitro group, a cyano group, a fluorine atom, a chlorine atom, -OCF₃、-SCF₃Fluoroalkyl, -CO-O-R²²²or-SO₂-R²²²(R²²²Represents an alkyl group having 1 to 25 carbon atoms which may have a halogen atom),

further preferred is cyano, -CO-O-R²²²or-SO₂-R²²²(R²²²Represents an alkyl group having 1 to 25 carbon atoms which may have a halogen atom),

cyano is particularly preferred.

R¹⁴And R¹⁵Preferably of the same construction.

R²⁴And R²⁵Preferably of the same construction.

R³⁴And R³⁵Preferably of the same construction.

R⁷⁴And R⁷⁵Preferably of the same construction.

R⁸⁴And R⁸⁵Preferably of the same construction.

The compound represented by the formula (I) (hereinafter, sometimes referred to as the compound (I)) is more preferably any one of the compound represented by the formula (I-1A), the compound represented by the formula (I-2A) and the compound represented by the formula (I-3A).

[ wherein Rx is₁、Rx₂、Rx₃、Rx₄、Rx₅、Rx₆、Rx₇And Rx₈Each independently represents a hydrogen atom or a substituent.]

As Rx₁～Rx₈Examples of the substituent include a group bonded to the ring W¹The same substituents may be present.

Examples of the compound (I) include the compounds described below.

The compound (I) is preferably a compound represented by the formula (1-1) to the formula (1-4), the formula (1-7), the formula (1-8), the formula (1-10), the formula (1-12), the formula (1-20) to the formula (1-25), the formula (1-54) to the formula (1-57), the formula (1-59), the formula (1-63) to the formula (1-68), the formula (1-70) to the formula (1-78), the formula (1-80), the formula (1-124) to the formula (1-132), the formula (1-135), the formula (1-137) to the formula (1-142), the formula (1-158) to the formula (1-172), the formula (1-218) to the formula (1-227),

More preferably a compound represented by the formula (1-4), the formula (1-7), the formula (1-10), the formula (1-12), the formula (1-20), the formula (1-22), the formula (1-54), the formula (1-55), the formula (1-56), the formula (1-59), the formula (1-63) to the formula (1-65), the formula (1-66), the formula (1-71), the formula (1-124), the formula (1-125), the formula (1-126), the formula (1-128), the formula (1-131), the formula (1-158), the formula (1-160), the formula (1-164), the formula (1-169), the formula (1-218) to the formula (1-228),

further preferred are compounds represented by the formula (1-55), the formula (1-56), the formula (1-59), the formula (1-64), the formula (1-125), the formula (1-218) to the formula (1-228).

Examples of the compound represented by the formula (II) (hereinafter, sometimes referred to as compound (II)) include the compounds described below.

The compound (II) is preferably a compound represented by the formula (2-1), the formula (2-2), the formula (2-5) to the formula (2-12), the formula (2-24) to the formula (2-28), the formula (2-32), the formula (2-33), the formula (2-38) to the formula (2-44), the formula (2-70), the formula (2-71), the formula (2-103), or the formula (2-104), more preferably a compound represented by the formula (2-1), the formula (2-2), the formula (2-5) to the formula (2-10), the formula (2-103), the formula (2-104), the formula (2-105), or the formula (2-106).

Examples of the compound represented by the formula (III) (hereinafter, sometimes referred to as compound (III)) include the compounds described below.

Examples of the compound represented by the formula (IV) (hereinafter, may be referred to as compound (IV)) include the compounds described below.

Examples of the compound represented by the formula (V) (hereinafter, sometimes referred to as compound (V)) include the compounds described below.

The compound (V) is preferably a compound represented by any one of the formulae (5-1) to (5-3), the formula (5-6), the formula (5-7), the formula (5-9), the formula (5-15), the formula (5-21), the formula (5-23), the formula (5-25), the formula (5-26), the formula (5-32), the formula (5-36) or the formula (5-38), more preferably a compound represented by any one of the formulae (5-1) to (5-3), the formula (5-21), the formula (5-25) or the formula (5-36).

Examples of the compound represented by the formula (VI) (hereinafter, sometimes referred to as compound (VI)) include the compounds described below.

As the compound (VI), preferred are compounds represented by the formula (6-1), the formula (6-2), the formula (6-4), the formula (6-5), the formula (6-7), the formula (6-8), the formula (6-9), the formula (6-12), the formula (6-15), the formula (6-18), the formula (6-19), the formula (6-22), the formula (6-23), the formula (6-50), the formula (6-57), the formula (6-69), the formula (6-80), the formula (6-85) and the formula (6-94), more preferred are compounds represented by the formula (6-1), the formula (6-2), the formula (6-4), the formula (6-8), the formula (6-15), the formula (6-22) and the formula (6-80).

Examples of the compound represented by the formula (VII) (hereinafter, sometimes referred to as compound (VII)) include the compounds described below.

The compound (VII) is preferably a compound represented by the formula (7-1) to the formula (7-9), the formula (7-12), the formula (7-14), the formula (7-17), the formula (7-42) to the formula (7-44), or the formula (7-57), more preferably a compound represented by the formula (7-1) to the formula (7-8).

Examples of the compound represented by the formula (VIII) (hereinafter, sometimes referred to as compound (VIII)) include the compounds described below.

The compound (VIII) is preferably a compound represented by the formula (8-1), the formula (8-2), the formula (8-4), the formula (8-5), the formula (8-11), the formula (8-13) to the formula (8-17), the formula (8-25), the formula (8-26), the formula (8-47) or the formula (8-48), more preferably a compound represented by the formula (8-1), the formula (8-4), the formula (8-5), the formula (8-15), the formula (8-17) or the formula (8-25).

< Process for producing Compound (I) >

Compound (I) can be produced in the same manner as the production method of compound (Y) except that compound (Y-A) is replaced with a compound represented by formula (I-A) (hereinafter, sometimes referred to as compound (I-A)).

[ in the formula, a ring W¹、R¹～R³The same meaning as above is indicated.]

Examples of the compound (I-A) include the following compounds.

The compound (I-A) can be obtained by reacting a compound represented by the formula (I-C) (hereinafter sometimes referred to as the compound (I-C)) with a compound represented by the formula (I-D) (hereinafter sometimes referred to as the compound (I-D)).

[ wherein, the ring W¹、R¹、R²And R³The same meaning as above is indicated. E₁Represents a leaving group.]

The reaction of the compound (I-C) with the compound (I-D) is carried out by mixing the compound (I-C) with the compound (I-D).

The amount of the compound (I-D) to be used is usually 0.1 to 5 mol, preferably 0.5 to 2 mol, based on 1 mol of the compound (I-C).

The reaction of the compound (I-C) with the compound (I-D) may be carried out in the presence of a solvent. Examples of the solvent include the same solvents as those used for the reaction of the compound (Y-C) and the compound (Y-D).

The reaction time of the compound (I-C) with the compound (I-D) is usually 0.1 to 10 hours.

The reaction temperature of the compound (I-C) and the compound (I-D) is usually-50 to 150 ℃.

Examples of the compound (I-C) include the following compounds.

As the compound (I-4), commercially available compounds can be used, and specific examples thereof are the same as those of the compound (Y-D).

The compound (I-C) can be obtained by reacting a compound represented by the formula (I-E) (hereinafter, sometimes referred to as the compound (I-E)) with a compound represented by the formula (I-F) (hereinafter, sometimes referred to as the compound (I-F)).

[ wherein, W¹、R¹And R²The same meaning as above is indicated.]

The reaction of the compound (I-E) with the compound (I-F) is carried out by mixing the compound (I-E) with the compound (I-F).

The amount of the compound (I-F) to be used is usually 0.1 to 5 mol, preferably 0.5 to 2 mol, based on 1 mol of the compound (I-E).

The reaction of the compound (I-E) with the compound (I-F) may be carried out in the presence of a solvent. Examples of the solvent include the same solvents as those used for the reaction of the compound (Y-E) and the compound (Y-F).

The reaction time of the compound (I-E) with the compound (I-F) is usually 0.1 to 10 hours.

The reaction temperature of the compound (I-E) and the compound (I-F) is usually-50 to 150 ℃.

Examples of the compound (I-E) include the compounds described below.

Examples of the compound (I-F) include the same compounds as those of the compound (Y-F).

The compound (I) can also be obtained by using a compound represented by the formula (I-G) (hereinafter sometimes referred to as compound (I-G)) and a compound (I-F) in place of the compound (I-A) and the compound (Y-B) described above.

[ in the formula (I-G), the ring W¹、R³、R⁴And R⁵The same meaning as above is indicated.]

Examples of the compound (I-G) include the following compounds.

< methods for producing Compounds (II) to (VIII) >

Compound (II) can be obtained, for example, by reacting 2 molar equivalents of compound (I-G) with 1 molar equivalent of compound represented by formula (II-1).

[ wherein, R²、R¹²And R⁶The same meaning as above is indicated.]

Examples of the compound represented by the formula (II-1) include the compounds described below.

Compound (III) can be obtained, for example, by reacting 2 molar equivalents of compound (I-G) with 1 molar equivalent of compound represented by formula (III-1).

[ in the formula, a ring W¹¹¹The same meaning as above is indicated.]

Examples of the compound represented by the formula (III-1) include the compounds described below.

Compound (IV) can be obtained, for example, by reacting 2 molar equivalents of compound (I-G) with 1 molar equivalent of compound represented by formula (IV-1).

[ in the formula, a ring W¹¹²Ring W¹¹³、R⁷The same meaning as above is indicated.]

Examples of the compound represented by the formula (IV-1) include the compounds described below.

Compound (V) can be obtained, for example, by reacting 2 molar equivalents of compound (I-A) with 1 molar equivalent of compound represented by formula (V-1).

[ in the formula, R⁴、R⁸And R⁴⁴The same meaning as above is indicated.]

Examples of the compound represented by the formula (V-1) include the compounds described below.

Compound (VI) can be obtained, for example, by reacting 3 molar equivalents of compound (I-A) with 1 molar equivalent of compound represented by formula (VI-1).

[ in the formula, R⁴、R⁸、R⁵⁴And R⁶⁴The same meaning as above is indicated.]

Examples of the compound represented by the formula (VI-1) include the compounds described below.

Compound (VII) can be obtained, for example, by reacting 3 molar equivalents of compound (I-G) with 1 molar equivalent of compound represented by formula (VII-1).

[ in the formula, R²、R¹⁰、R⁷²And R⁸²The same meaning as above is indicated.]

Examples of the compound represented by the formula (VII-1) include the compounds described below.

Compound (VIII) can be obtained, for example, by reacting 4 molar equivalents of compound (I-A) with 1 molar equivalent of compound represented by formula (VIII-1).

[ in the formula, R⁴、R¹¹、R⁹⁴、R¹⁰⁴And R¹¹⁴The same meaning as above is indicated.]

Examples of the compound represented by the formula (VIII-1) include the compounds described below.

The content of the light selective absorbing compound (B) is usually 0.01 to 50 parts by mass, preferably 0.1 to 20 parts by mass, more preferably 0.5 to 10 parts by mass, and particularly preferably 1.0 to 5 parts by mass, based on 100 parts by mass of the resin (A).

< light selective absorption Compound (C) >

The light selective absorbing compound (C) is a monomer having a polymerizable group in the molecule and showing maximum absorption in a range of a wavelength of 300nm or more and a wavelength of less than 360 nm. The light selective absorbing compound (C) preferably exhibits maximum absorption in a range of a wavelength of 320nm or more and a wavelength of 355nm or less, and more preferably exhibits maximum absorption in a range of a wavelength of 330nm or more and a wavelength of 350nm or less.

The light selective absorbing compound (C) has a polymerizable group. Examples of the polymerizable group include: cationic polymerizable groups such as epoxy groups, oxetanyl groups, oxazoline groups, aziridine groups, and vinyl ether groups; a radically polymerizable group such as an ethylenically unsaturated group. The polymerizable group of the light selective absorbing compound (C) is preferably a radical polymerizable group such as an ethylenically unsaturated group. Specific examples of the ethylenically unsaturated group include a vinyl group, an α -methylvinyl group, an acryloyl group, a methacryloyl group, an allyl group, a styryl group, a (meth) acrylamide group, a vinylsulfo group, and a (meth) acryloyloxy group.

Examples of the light selective absorbing compound (C) include: a compound having a polymerizable group and a benzotriazole skeleton in a molecule, a compound having a polymerizable group and a benzimidazole skeleton in a molecule, a compound having a polymerizable group and a triazine skeleton in a molecule, a compound having a polymerizable group and a benzophenone skeleton in a molecule, a compound having a polymerizable group and a cyanoacrylate skeleton having no polymerizability in a molecule, and the like.

Examples of the light selective absorbing compound (C) include the following compounds.

2- [2- (2, 4-dihydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate,

2- [2- (4-ethoxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate,

2- [2- (4-butoxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate,

2- [2- (4-benzoyloxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate, a pharmaceutically acceptable salt thereof, a pharmaceutically acceptable carrier, and a pharmaceutically acceptable carrier,

4- [2- (2, 4-dihydroxyphenyl) -2H-benzotriazol-5-yloxy ] butyl methacrylate,

4- [2- (4-ethoxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] butyl methacrylate,

4- [2- (4-butoxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] butyl methacrylate,

4- [2- (2-hydroxy-4-octyloxyphenyl) -2H-benzotriazol-5-yloxy ] butyl methacrylate,

4- [2- (4-benzoyloxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] butyl methacrylate, a pharmaceutically acceptable salt thereof, a pharmaceutically acceptable carrier, and a pharmaceutically acceptable carrier,

2- [2- (2-hydroxy-4-octyloxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate,

2- [2- (4-octyloxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate,

2- [2- (4-methoxy-5-tert-butyl-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate,

2- [2- (4-methoxy-3-tert-butyl-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate,

2- [2- (4-methoxy-3-methyl-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl methacrylate, a pharmaceutically acceptable salt thereof, a pharmaceutically acceptable carrier, and a pharmaceutically acceptable carrier,

2- [ 2-hydroxy-5- (methacryloyloxyethyl) phenyl ] -2H-benzotriazole,

2- [ 2-hydroxy-5- (methacryloyl) phenyl ] -2H-benzotriazole,

2- [ 2-hydroxy-5- (methacryloxypropyl) phenyl ] -5-chloro-2H-benzotriazole,

2- [ 2-hydroxy-5- (methacryloxypropyl) phenyl ] -2H-benzotriazole,

N- [ 3-benzotriazol-2-yl-2-hydroxy-5- (1,1,3, 3-tetramethylbutyl) -benzoyl ] -2-methylmethacrylamide,

Acrylic acid 2- [2- (2, 4-dihydroxyphenyl) -2H-benzotriazole-5-yloxy ] ethyl ester,

Acrylic acid 2- [2- (4-ethoxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl ester,

Acrylic acid 2- [2- (4-butoxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl ester,

Acrylic acid 2- [2- (4-benzoyloxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl ester,

Acrylic acid 4- [2- (2, 4-dihydroxyphenyl) -2H-benzotriazol-5-yloxy ] butyl ester,

Acrylic acid 4- [2- (4-ethoxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] butyl ester,

Acrylic acid 4- [2- (4-butoxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] butyl ester,

Acrylic acid 4- [2- (2-hydroxy-4-octyloxyphenyl) -2H-benzotriazol-5-yloxy ] butyl ester,

Acrylic acid 2- [2- (2-hydroxy-4-octyloxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl ester,

Acrylic acid 4- [2- (4-benzoyloxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] butyl ester,

Acrylic acid 2- [2- (4-octyloxy-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl ester,

Acrylic acid 2- [2- (4-methoxy-5-tert-butyl-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl ester,

Acrylic acid 2- [2- (4-methoxy-3-tert-butyl-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl ester,

Acrylic acid 2- [2- (4-methoxy-3-methyl-2-hydroxyphenyl) -2H-benzotriazol-5-yloxy ] ethyl ester,

2- [ 2-hydroxy-5- (acryloyloxyethyl) phenyl ] -2H-benzotriazole,

2- [ 2-hydroxy-5- (acryloyl) phenyl ] -2H-benzotriazole,

2- [ 2-hydroxy-5- (methacryloxypropyl) phenyl ] -5-chloro-2H-benzotriazole,

2- [ 2-hydroxy-5- (methacryloxypropyl) phenyl ] -2H-benzotriazole,

N- [ 3-benzotriazol-2-yl-2-hydroxy-5- (1,1,3, 3-tetramethylbutyl) -benzoyl ] -2-methacrylamide,

2-hydroxy-4-acryloyloxybenzophenone,

2-hydroxy-4-methacryloxy benzophenone,

2-hydroxy-4- (2-acryloyloxy) ethoxy benzophenone,

2-hydroxy-4- (2-methacryloyloxy) ethoxy benzophenone,

2-hydroxy-4- (2-methyl-2-acryloyloxy) ethoxy benzophenone,

2, 4-diphenyl-6- [ 2-hydroxy-4- (2-methacryloyloxyethoxy) phenyl ] s-triazine,

2, 4-diphenyl-6- [ 2-hydroxy-4- (2-acryloyloxyethoxy) phenyl ] s-triazine,

2, 4-bis (2-methylphenyl) -6- [ 2-hydroxy-4- (3-methacryloyloxy-2-hydroxypropoxy) phenyl ] s-triazine,

2, 4-bis (2-methylphenyl) -6- [ 2-hydroxy-4- (3-acryloyloxy-2-hydroxypropoxy) phenyl ] s-triazine,

2, 4-bis (2-methoxyphenyl) -6- [ 2-hydroxy-4- (2-acryloyloxyethoxy) phenyl ] s-triazine,

2, 4-bis (2-methoxyphenyl) -6- [ 2-hydroxy-4- (2-methacryloyloxyethoxy) phenyl ] s-triazine,

2, 4-bis (2-ethylphenyl) -6- [ 2-hydroxy-4- (2-methacryloyloxyethoxy) phenyl ] s-triazine,

2, 4-bis (2-ethylphenyl) -6- [ 2-hydroxy-4- (2-acryloyloxyethoxy) phenyl ] s-triazine,

2, 4-bis (2-ethoxyphenyl) -6- [ 2-hydroxy-4- (2-methacryloyloxyethoxy) phenyl ] s-triazine,

2, 4-bis (2-ethoxyphenyl) -6- [ 2-hydroxy-4- (2-acryloyloxyethoxy) phenyl ] s-triazine, and the like.

Further, the light selective absorbing compound (C) may include the following compounds.

As the light selective absorbing compound (C), commercially available products can be used, and specific examples thereof include "RUV-93" (available from Otsuka Chemical Co., Ltd.), "CHISORB 5687" (available from Double bond Chemical Co., Ltd.), "Tinuvin R796" (available from BASF Co., Ltd.).

The light selective absorbing compound (C) is preferably a compound having a polymerizable group and a benzotriazole skeleton in a molecule, a compound having a polymerizable group and a triazine skeleton in a molecule, or a compound having a polymerizable group and a benzophenone skeleton in a molecule.

The content of the light selective absorbing compound (C) is usually 0.1 to 70 parts by mass, preferably 1 to 50 parts by mass, more preferably 5 to 30 parts by mass, still more preferably 7.5 to 25 parts by mass, and particularly preferably 10 to 20 parts by mass, based on 100 parts by mass of the resin (A).

The content ratio (mass ratio) of the light selective absorbing compound (C) to the light selective absorbing compound (B) is usually 100/5 to 100/30, preferably 100/5 to 100/25.

The adhesive composition of the present invention may further contain an initiator (D), a radical-curable component (E), and a crosslinking agent (F).

< initiator (D) >

The initiator (D) may be any compound that causes a polymerization reaction of the light selective absorbing compound (C) or the radically curable component (E) contained as necessary. The initiator (D) may be any of a compound that causes a polymerization reaction by absorbing thermal energy (thermal polymerization initiator) and a compound that causes a polymerization reaction by absorbing light energy (photopolymerization initiator). Here, the light is preferably active energy rays such as visible light, ultraviolet rays, X-rays, or electron rays.

Examples of the thermal polymerization initiator include a compound that generates radicals by heating or the like (thermal radical generator), a compound that generates an acid by heating or the like (thermal acid generator), and a compound that generates a base by heating or the like (thermal base generator).

Examples of the photopolymerization initiator include: a compound that generates a radical by absorbing light energy (photo radical generator), a compound that generates an acid by absorbing light energy (photo acid generator), a compound that generates a base by absorbing light energy (photo base generator), and the like.

The initiator (D) is preferably an initiator suitable for the polymerization reaction of the light selective absorbing compound (C) or the radical curable component (E), preferably a radical generator, and more preferably a photoradical generator. Examples of the radical generator include a thermal radical generator and a photoradical generator.

The initiator (D) may contain 2 or more species, and a photo radical generator and a thermal radical generator may be used in combination.

Examples of the radical generator include alkylphenone compounds, benzoin compounds, benzophenone compounds, oxime ester compounds, and phosphine compounds. The radical generator is preferably a photo radical generator, and more preferably an oxime ester-based photo radical generator from the viewpoint of reactivity of the polymerization reaction. By using the oxime ester radical generator, the reaction rate of the light selective absorbing compound (C) and the radical curing component (E) can be improved even under curing conditions of low illuminance or light intensity.

Examples of the alkylphenone compound include an α -aminoalkylphenylketone compound, an α -hydroxyalkylphenylketone compound, and an α -alkoxyalkylphenone compound.

Examples of the α -aminoalkylphenylketone compound include 2-methyl-2-morpholino-1- (4-methylthiophenyl) propan-1-one, 2-dimethylamino-1- (4-morpholinophenyl) -2-benzylbutan-1-one, 2-dimethylamino-1- (4-morpholinophenyl) -2- (4-methylphenylmethyl) butan-1-one, and the like, preferred examples thereof include 2-methyl-2-morpholino-1- (4-methylthiophenyl) propan-1-one and 2-dimethylamino-1- (4-morpholinophenyl) -2-benzylbutan-1-one. Commercially available products such as IRGACURE (registered trademark) 127, 184, 369E, 379EG, 651, 907, 1173, 2959 (manufactured by BASF japan ltd.), SEIKUOL (registered trademark) BEE (manufactured by seiki chemical).

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

Examples of the benzophenone compound include benzophenone, methyl benzoylbenzoate, 4-phenylbenzophenone, 4-benzoyl-4 ' -methyldiphenyl sulfide, 3 ', 4,4 ' -tetrakis (t-butylperoxycarbonyl) benzophenone, and 2,4, 6-trimethylbenzophenone. The benzophenone compound may be a commercially available compound.

Examples of the oxime ester compounds include N-benzoyloxy-1- (4-phenylthiophenyl) butan-1-one-2-imine, N-benzoyloxy-1- (4-phenylthiophenyl) oct-1-one-2-imine, n-acetoxy-1- [ 9-ethyl-6- (2-methylbenzoyl) -9H-carbazol-3-yl ] ethane-1-imine, N-acetoxy-1- [ 9-ethyl-6- { 2-methyl-4- (3, 3-dimethyl-2, 4-dioxopentylmethyloxy) benzoyl } -9H-carbazol-3-yl ] ethane-1-imine, and the like. As the oxime compound, commercially available products such as IRGACURE OXE-01, OXE-02, OXE-03 (BASF, Japan Co., Ltd.), N-1919, NCI-730, NCI-831, NC I-930(ADEKA, Ltd.), PBG3057(TRONLY, Ltd.) and the like can be used.

Examples of the phosphine compound include acylphosphine oxides such as phenyl (2,4, 6-trimethylbenzoyl) phosphine oxide and diphenyl (2,4, 6-trimethylbenzoyl) phosphine oxide. Examples of the phosphine compound include IRGA CURE (registered trade product) TPO, IRGACURE 819 (manufactured by BASF Japan K.K.).

Examples of the acid generator include onium salts such as aromatic iodonium salts and aromatic sulfonium salts; an aromatic diazonium salt; iron-arene complexes, and the like.

The aromatic iodonium salt is a compound having a diaryliodonium cation, and typical examples of the cation include diphenyliodonium cation. The aromatic sulfonium salt is a compound having a triarylsulfonium cation, and typical examples of the cation include a triphenylsulfonium cation, a 4, 4' -bis (diphenylsulfonium) diphenylsulfide cation, and the like. The aromatic diazonium salt is a compound having a diazonium cation, and the cation is typically a benzenediazonium cation. Additionally, the iron-arene complex is typically a cyclopentadienyl iron (II) arene cation complex salt.

The cations shown above are paired with anions (anion) to constitute a photo cation generator. Examples of the anion constituting the photo cation generator include a specific phosphorus anion [ (Rf)_nPF_6-n]^-Hexafluorophosphate anion PF₆ ^-Hexafluoroantimonate anion SbF₆ ^-Pentafluoro hydroxy antimonate anion SbF₅(OH)^-Hexafluoroarsenate anion AsF₆ ^-Tetrafluoroborate anion BF₄ ^-Tetrakis (pentafluorophenyl) borate anion B (C) ₆F₅)₄ ^-And so on. Among them, from the viewpoints of curability of the cationically polymerizable compound and safety of the obtained pressure-sensitive adhesive layer, a specific phosphorus anion [ (Rf)_nPF_6-n]^-Hexafluorophosphate anion PF₆ ^-Tetrakis (pentafluorophenyl) borate anion B (C)₆F₅)₄ ^-Hexafluoroantimonate anion SbF₆ ^-。

Examples of the photobase generator include a carbamate compound, an α -aminoketone compound, a quaternary ammonium compound, an O-acyloxime compound, and an aminocyclopropenone compound.

Examples of the urethane compound include: 1- (2-Anthraquinonyl) ethyl 1-piperidinecarboxylate, 1H-2-ethylimidazole-1-carboxylic acid 1- (2-anthraquinonyl) ethyl ester, 9-anthrylmethyl 1-piperidinecarboxylate, 9-anthrylmethyl N, N-diethylcarbamate, 9-anthrylmethyl N-propylcarbamate, 9-anthrylmethyl N-cyclohexylcarbamate, 9-anthrylmethyl 1H-imidazole-1-carboxylate, 9-anthrylmethyl N, N-dioctylcarbamate, 9-anthrylmethyl 1- (4-hydroxypiperidine) carboxylate, 1-pyrenylmethyl 1-piperidinecarboxylate, bis [1- (2-anthraquinonyl) ethyl ] 1, 6-hexanediylbis-carbamate, 1, 6-Hexanediylbis (9-anthrylmethyl) carbamate, and the like.

As α -aminoketone compounds, for example, the following are known. Examples thereof include 1-phenyl-2- (4-morpholinobenzoyl) -2-dimethylaminobutane and 2- (4-methylthiobenzoyl) -2-morpholinopropane.

Examples of quaternary ammonium compounds as the photobase generator include: 1- (4-phenylthiophenacyl) -1-azonian-4-azabicyclo [2,2,2] octane tetraphenylborate, 5- (4-phenylthiophenacyl) -1-aza-5-azonian-bicyclo [4,3,0] -5-nonenene tetraphenylborate, 8- (4-phenylthiophenacyl) -1-aza-8-azonian-bicyclo [5,4,0] -7-undecene tetraphenylborate, and the like.

Examples of the aminocyclopropenone compound as the photobase generator include: 2-diethylamino-3-phenylcyclopropenone, 2-diethylamino-3- (1-naphthyl) cyclopropenone, 2-pyrrolidinyl-3-phenylcyclopropenone, 2-imidazolyl-3-phenylcyclopropenone, 2-isopropylamino-3-phenylcyclopropenone, and the like.

Examples of the thermal alkali-generating agent include carbamate derivatives such as 2- (4-biphenyl) -2-propyl carbamate and 1, 1-dimethyl-2-cyanoethyl carbamate, urea derivatives such as urea and N, N' -trimethylurea, dihydropyridine derivatives such as 1, 4-dihydronicotinamide, and salts formed from acids and bases such as dicyandiamide, organic salts, and inorganic salts.

The content of the initiator (D) is usually 0.01 to 20 parts by mass, preferably 0.1 to 10 parts by mass, more preferably 0.5 to 5 parts by mass, and still more preferably 1 to 3 parts by mass, based on 100 parts by mass of the resin (a).

< radically curable component (E) >

Examples of the radical curable component (E) include monomers and oligomers that cure by radical polymerization.

Examples of the radical curable component (E) include monofunctional or polyfunctional (meth) acrylate compounds, styrene compounds, and vinyl compounds.

The adhesive composition of the present invention may contain 2 or more radical-curable components (E).

Examples of the (meth) acrylate compound include (meth) acryloyl group-containing compounds such as (meth) acrylate monomers having at least 1 (meth) acryloyloxy group in the molecule, (meth) acrylamide monomers, and (meth) acrylic oligomers having at least 2 (meth) acryloyl groups in the molecule. The (meth) acrylic oligomer is preferably a (meth) acrylate oligomer having at least 2 (meth) acryloyloxy groups in the molecule. The (meth) acrylic compound may be used alone in 1 kind, or may be used in combination in 2 or more kinds.

Examples of the (meth) acrylate monomer include a monofunctional (meth) acrylate monomer having 1 (meth) acryloyloxy group in the molecule, a difunctional (meth) acrylate monomer having 2 (meth) acryloyloxy groups in the molecule, and a polyfunctional (meth) acrylate monomer having 3 or more (meth) acryloyloxy groups in the molecule.

Examples of the monofunctional (meth) acrylate monomer include alkyl (meth) acrylates. In the alkyl (meth) acrylate, when the number of carbon atoms in the alkyl group is 3 or more, the alkyl group may be any of linear, branched, and cyclic. Examples of the alkyl (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate.

Examples of the monofunctional (meth) acrylate monomer include aralkyl (meth) acrylates such as benzyl (meth) acrylate; (meth) acrylic acid esters of terpene alcohols such as isobornyl (meth) acrylate; (meth) acrylates having a tetrahydrofurfuryl structure such as tetrahydrofurfuryl (meth) acrylate; (meth) acrylates having a cycloalkyl group at the alkyl moiety, such as cyclohexyl (meth) acrylate, cyclohexylmethyl methacrylate, dicyclopentyl acrylate, dicyclopentenyl (meth) acrylate, and 1, 4-cyclohexanedimethanol monoacrylate; aminoalkyl (meth) acrylates such as N, N-dimethylaminoethyl (meth) acrylate; (meth) acrylates having an ether bond at the alkyl moiety, such as 2-phenoxyethyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, ethylcarbitol (meth) acrylate, and phenoxypolyethylene glycol (meth) acrylate; and so on.

Further, examples of the monofunctional (meth) acrylate monomer include monofunctional (meth) acrylates having a hydroxyl group at an alkyl position; a monofunctional (meth) acrylate having a carboxyl group at an alkyl site. Examples of the monofunctional (meth) acrylate having a hydroxyl group at an alkyl portion include 2-hydroxyethyl (meth) acrylate, 2-or 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, trimethylolpropane mono (meth) acrylate, and pentaerythritol mono (meth) acrylate. Examples of the monofunctional (meth) acrylate having a carboxyl group at an alkyl portion include 2-carboxyethyl (meth) acrylate, ω -carboxy-polycaprolactone (N ═ 2) mono (meth) acrylate, 1- [2- (meth) acryloyloxyethyl ] phthalate, 1- [2- (meth) acryloyloxyethyl ] hexahydrophthalate, 1- [2- (meth) acryloyloxyethyl ] succinate, 4- [2- (meth) acryloyloxyethyl ] trimellitate, and N- (meth) acryloyloxy-N ', N' -dicarboxymethyl-p-phenylenediamine.

The (meth) acrylamide monomer is preferably a (meth) acrylamide having a substituent at the N-position. A typical example of the substituent at the N-position thereof is an alkyl group, but may form a ring together with the nitrogen atom of (meth) acrylamide, and the ring may have an oxygen atom as a ring-constituting unit in addition to a carbon atom and the nitrogen atom of (meth) acrylamide. Further, a substituent such as an alkyl group or an oxo group (═ O) may be bonded to a carbon atom constituting the ring.

Examples of the N-substituted (meth) acrylamide include N-alkyl (meth) acrylamides such as N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N-N-butyl (meth) acrylamide, N-tert-butyl (meth) acrylamide, and N-hexyl (meth) acrylamide; n, N-dialkyl (meth) acrylamides such as N, N-dimethyl (meth) acrylamide and N, N-diethyl (meth) acrylamide, and the like. The N-substituent may be an alkyl group having a hydroxyl group, and examples thereof include N-hydroxymethyl (meth) acrylamide, N- (2-hydroxyethyl) (meth) acrylamide, N- (2-hydroxypropyl) (meth) acrylamide, and the like. Specific examples of the N-substituted (meth) acrylamide forming the five-membered ring or the six-membered ring include N-acryloylpyrrolidine, 3-acryloyl-2-oxazolidinone, 4-acryloylmorpholine, N-acryloylpiperidine, and N-methacryloylpiperidine.

Examples of the difunctional (meth) acrylate monomer include:

alkylene glycol di (meth) acrylates such as ethylene glycol di (meth) acrylate, 1, 3-butylene glycol di (meth) acrylate, 1, 4-butylene glycol di (meth) acrylate, 1, 6-hexanediol di (meth) acrylate, 1, 9-nonanediol di (meth) acrylate, and neopentyl glycol di (meth) acrylate; polyoxyalkylene glycol di (meth) acrylates such as diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, polyethylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, and polytetramethylene glycol di (meth) acrylate;

Di (meth) acrylates of halogen-substituted alkylene glycols such as tetrafluoroethylene di (meth) acrylate;

di (meth) acrylates of aliphatic polyhydric alcohols such as trimethylolpropane di (meth) acrylate, ditrimethylolpropane di (meth) acrylate and pentaerythritol di (meth) acrylate;

hydrogenated dicyclopentadiene or tricyclodecanedialkanol di (meth) acrylates such as hydrogenated biscyclopentadienyl di (meth) acrylate and tricyclodecanedimethanol di (meth) acrylate;

1, 3-dioxane-2, 5-diylbis (meth) acrylate [ alternative name: dioxane diol or dioxane di (meth) acrylate of dioxane dialkanol such as dioxane diol di (meth) acrylate ];

di (meth) acrylates of alkylene oxide adducts of bisphenol a or bisphenol F such as bisphenol a ethylene oxide adduct diacrylate and bisphenol F ethylene oxide adduct diacrylate;

epoxy di (meth) acrylates of bisphenol a or bisphenol F such as acrylic acid adducts of bisphenol a diglycidyl ether and acrylic acid adducts of bisphenol F diglycidyl ether;

silicone di (meth) acrylate;

di (meth) acrylate of neopentyl glycol hydroxypivalate;

2, 2-bis [4- (meth) acryloyloxyethoxyethoxyphenyl ] propane;

2, 2-bis [4- (meth) acryloyloxyethoxyethoxyethoxycyclohexyl ] propane;

di (meth) acrylate of 2- (2-hydroxy-1, 1-dimethylethyl) -5-ethyl-5-hydroxymethyl-1, 3-dioxane ];

tris (hydroxyethyl) isocyanurate di (meth) acrylate; and so on.

Examples of the trifunctional or higher multifunctional (meth) acrylate monomer include trifunctional or higher multifunctional (meth) acrylates of aliphatic polyhydric alcohols such as glycerol tri (meth) acrylate, alkoxylated glycerol tri (meth) acrylate, trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate, and dipentaerythritol hexa (meth) acrylate; poly (meth) acrylates of trifunctional or higher halogen-substituted polyols; tri (meth) acrylates of alkylene oxide adducts of glycerol;

tri (meth) acrylate of alkylene oxide adduct of trimethylolpropane; 1,1, 1-tris [ (meth) acryloyloxyethoxyethoxy ] propane; tris (hydroxyethyl) isocyanurate tri (meth) acrylate, and the like.

Further, commercially available products can be used. Examples of commercially available products include A-DPH-12E, A-TMPT and A-9300 (manufactured by Ninghamu chemical Co., Ltd.).

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

The urethane (meth) acrylic oligomer refers to a compound having a urethane bond (-NHCOO-) and at least 2 (meth) acryloyl groups in a molecule. Specifically, it may be: a urethanization reaction product of a hydroxyl group-containing (meth) acrylic monomer having at least 1 (meth) acryloyl group and at least 1 hydroxyl group, respectively, in a molecule, and a polyisocyanate; a urethane-formed reaction product of a urethane compound having a terminal isocyanate group obtained by reacting a polyol with a polyisocyanate and a (meth) acrylic monomer having at least 1 (meth) acryloyl group and at least 1 hydroxyl group in the molecule, respectively.

The hydroxyl group-containing (meth) acrylic monomer used in the above-mentioned urethanization reaction may be, for example, a hydroxyl group-containing (meth) acrylate monomer, and specific examples thereof include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, glycerol di (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate. Specific examples of the hydroxyl group-containing (meth) acrylate monomer other than the hydroxyl group-containing (meth) acrylate monomer include N-hydroxyalkyl (meth) acrylamide monomers such as N-hydroxyethyl (meth) acrylamide and N-hydroxymethyl (meth) acrylamide.

Examples of the polyisocyanate to be subjected to the urethane-forming reaction with the hydroxyl group-containing (meth) acrylic monomer include hexamethylene diisocyanate, lysine diisocyanate, isophorone diisocyanate, dicyclohexylmethane diisocyanate, toluene diisocyanate, xylylene diisocyanate, diisocyanates obtained by hydrogenating aromatic isocyanates among these diisocyanates (e.g., hydrogenated toluene diisocyanate, hydrogenated xylylene diisocyanate, etc.), di-or triisocyanates such as triphenylmethane triisocyanate and dibenzylbenzene triisocyanate, and polyisocyanates obtained by polymerizing the above diisocyanates.

As the polyol used for forming the isocyanate group-terminated urethane compound by the reaction with the polyisocyanate, a polyester polyol, a polyether polyol, or the like can be used in addition to the aromatic, aliphatic, or alicyclic polyol. Examples of the aliphatic and alicyclic polyhydric alcohols include 1, 4-butanediol, 1, 6-hexanediol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, neopentyl glycol, trimethylolethane, trimethylolpropane, ditrimethylolpropane, pentaerythritol, dipentaerythritol, dimethylolheptane, dimethylolpropionic acid, dimethylolbutyric acid, glycerin, hydrogenated bisphenol a, and the like.

The polyester polyol is obtained by a dehydration condensation reaction of the above polyol with a polycarboxylic acid or an anhydride thereof. As examples of the polycarboxylic acid or anhydride thereof, when the substance which may be an anhydride is denoted by "(anhydride)", there are succinic acid (anhydride), adipic acid, maleic acid (anhydride), itaconic acid (anhydride), trimellitic acid (anhydride), pyromellitic acid (anhydride), phthalic acid (anhydride), isophthalic acid, terephthalic acid, hexahydrophthalic acid (anhydride), and the like.

The polyether polyol may be a polyalkylene glycol, a polyoxyalkylene-modified polyol obtained by the reaction of the above polyol or dihydroxybenzene with an alkylene oxide, or the like.

The polyester (meth) acrylate oligomer means an oligomer having an ester bond and at least 2 (meth) acryloyloxy groups in the molecule.

The polyester (meth) acrylate oligomer can be obtained by, for example, subjecting (meth) acrylic acid, a polycarboxylic acid or an anhydride thereof, and a polyol to dehydration condensation reaction.

Examples of the polycarboxylic acid or anhydride thereof include succinic anhydride, adipic acid, maleic anhydride, itaconic anhydride, trimellitic anhydride, pyromellitic anhydride, hexahydrophthalic anhydride, phthalic acid, succinic acid, maleic acid, itaconic acid, trimellitic acid, pyromellitic acid, hexahydrophthalic acid, phthalic acid, isophthalic acid, and terephthalic acid.

Examples of the polyhydric alcohol include 1, 4-butanediol, 1, 6-hexanediol, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, neopentyl glycol, trimethylolethane, trimethylolpropane, ditrimethylolpropane, pentaerythritol, dipentaerythritol, dimethylolheptane, dimethylolpropionic acid, dimethylolbutyric acid, glycerol, hydrogenated bisphenol a, and the like.

The epoxy (meth) acrylic oligomer can be obtained by addition reaction of a polyglycidyl ether and (meth) acrylic acid. The epoxy (meth) acrylic oligomer has at least 2 (meth) acryloyloxy groups in the molecule.

Examples of the polyglycidyl ether include ethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, 1, 6-hexanediol diglycidyl ether, and bisphenol a diglycidyl ether.

Examples of the styrene-based compound include styrene; alkylstyrenes such as methylstyrene, dimethylstyrene, trimethylstyrene, ethylstyrene, diethylstyrene, triethylstyrene, propylstyrene, butylstyrene, hexylstyrene, heptylstyrene, octylstyrene and the like; halogenated styrenes such as fluorostyrene, chlorostyrene, bromostyrene, dibromostyrene, iodostyrene, etc.; nitrostyrene; acetyl styrene; a methoxystyrene; and divinylbenzene.

The radical-curable component (E) is preferably a (meth) acrylate compound, and more preferably a polyfunctional (meth) acrylate compound. The polyfunctional (meth) acrylate compound is preferably 3 or more functional groups.

The content of the radically curable component (E) is usually 0.5 to 100 parts by mass, preferably 1 to 70 parts by mass, more preferably 3 to 50 parts by mass, still more preferably 5 to 30 parts by mass, and particularly preferably 7.5 to 20 parts by mass, based on 100 parts by mass of the resin (a).

< crosslinking agent (F) >

Examples of the crosslinking agent (F) include an isocyanate crosslinking agent, an epoxy crosslinking agent, an aziridine crosslinking agent, and a metal chelate crosslinking agent, and particularly, from the viewpoints of pot life of the adhesive composition, durability of the adhesive layer, crosslinking speed, and the like, an isocyanate crosslinking agent is preferable.

The isocyanate-based crosslinking agent is preferably a compound having at least 2 isocyanate groups (-NCO) in the molecule, and examples thereof include aliphatic isocyanate-based compounds (e.g., hexamethylene diisocyanate), alicyclic isocyanate-based compounds (e.g., isophorone diisocyanate, hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene diisocyanate), aromatic isocyanate-based compounds (e.g., toluene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate, triphenylmethane triisocyanate, and the like). The crosslinking agent (F) may be an adduct (adduct) of the isocyanate compound with a polyol compound [ for example, an adduct based on glycerin, trimethylolpropane or the like ], an isocyanurate compound, a biuret compound, a urethane prepolymer type isocyanate compound obtained by an addition reaction with a polyether polyol, a polyester polyol, an acrylic polyol, a polybutadiene polyol, a polyisoprene polyol or the like, or the like. The crosslinking agent (F) may be used alone or in combination of two or more. Among these, typically, aromatic isocyanate compounds (e.g., toluene diisocyanate, xylylene diisocyanate), aliphatic isocyanate compounds (e.g., hexamethylene diisocyanate), adducts thereof based on polyol compounds (e.g., glycerin, trimethylolpropane), or isocyanurate compounds can be cited. If the crosslinking agent (F) is an aromatic isocyanate-based compound and/or an adduct thereof based on a polyol compound or an isocyanurate compound, it is possible to improve the durability of the adhesive layer because it is advantageous to form an optimum crosslinking density (or crosslinking structure). Particularly, if the adhesive layer is a toluene diisocyanate-based compound and/or an adduct thereof based on a polyol compound, the durability can be improved even when the adhesive layer is applied to a polarizing plate or the like.

The content of the crosslinking agent (F) is usually 0.01 to 25 parts by mass, preferably 0.1 to 15 parts by mass, more preferably 0.15 to 7 parts by mass, still more preferably 0.2 to 5 parts by mass, and particularly preferably 0.25 to 2 parts by mass, based on 100 parts by mass of the resin (A).

The adhesive composition of the present invention may further contain a silane compound (G).

Examples of the silane compound (G) include vinyltrimethoxysilane, vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylethoxydimethylsilane, 2- (3, 4-epoxycyclohexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloxypropyltrimethoxysilane and 3-mercaptopropyltrimethoxysilane.

The silane compound (G) may be a silicone oligomer. Specific examples of the silicone oligomer are as follows when the silicone oligomer is expressed as a combination of monomers.

Mercaptopropyl-containing oligomers such as 3-mercaptopropyltrimethoxysilane-tetramethoxysilane oligomer, 3-mercaptopropyltrimethoxysilane-tetraethoxysilane oligomer, 3-mercaptopropyltriethoxysilane-tetramethoxysilane oligomer, and 3-mercaptopropyltriethoxysilane-tetraethoxysilane oligomer; mercapto methyl group-containing oligomers such as mercapto methyltrimethoxysilane-tetramethoxysilane oligomer, mercapto methyltrimethoxysilane-tetraethoxysilane oligomer, mercapto methyltriethoxysilane-tetramethoxysilane oligomer, and mercapto methyltriethoxysilane-tetraethoxysilane oligomer; 3-glycidoxypropyltrimethoxysilane-tetramethoxysilane copolymer, 3-glycidoxypropyltrimethoxysilane-tetraethoxysilane copolymer, 3-glycidoxypropyltriethoxysilane-tetramethoxysilane copolymer, 3-glycidoxypropyltriethoxysilane-tetraethoxysilane copolymer, 3-glycidoxypropyl group-containing copolymers such as 3-glycidoxypropylmethyldimethoxysilane-tetramethoxysilane copolymer, 3-glycidoxypropylmethyldimethoxysilane-tetraethoxysilane copolymer, 3-glycidoxypropylmethyldiethoxysilane-tetramethoxysilane copolymer and 3-glycidoxypropylmethyldiethoxysilane-tetraethoxysilane copolymer; 3-methacryloxypropyltrimethoxysilane-tetramethoxysilane oligomer, 3-methacryloxypropyltrimethoxysilane-tetraethoxysilane oligomer, 3-methacryloxypropyltriethoxysilane-tetramethoxysilane oligomer, 3-methacryloxypropyltriethoxysilane-tetraethoxysilane oligomer, methacryloxypropyl-containing oligomers such as 3-methacryloxypropylmethyldimethoxysilane-tetramethoxysilane oligomer, 3-methacryloxypropylmethyldimethoxysilane-tetraethoxysilane oligomer, 3-methacryloxypropylmethyldiethoxysilane-tetramethoxysilane oligomer, and 3-methacryloxypropylmethyldiethoxysilane-tetraethoxysilane oligomer; 3-acryloxypropyltrimethoxysilane-tetramethoxysilane oligomer, 3-acryloxypropyltrimethoxysilane-tetraethoxysilane oligomer, 3-acryloxypropyltriethoxysilane-tetramethoxysilane oligomer, 3-acryloxypropyltriethoxysilane-tetraethoxysilane oligomer, acryloxypropyl-containing oligomers such as 3-acryloxypropylmethyldimethoxysilane-tetramethoxysilane oligomer, 3-acryloxypropylmethyldimethoxysilane-tetraethoxysilane oligomer, 3-acryloxypropylmethyldiethoxysilane-tetramethoxysilane oligomer, and 3-acryloxypropylmethyldiethoxysilane-tetraethoxysilane oligomer; vinyl group-containing oligomers such as vinyltrimethoxysilane-tetramethoxysilane oligomer, vinyltrimethoxysilane-tetraethoxysilane oligomer, vinyltriethoxysilane-tetramethoxysilane oligomer, vinyltriethoxysilane-tetraethoxysilane oligomer, vinylmethyldimethoxysilane-tetramethoxysilane oligomer, vinylmethyldimethoxysilane-tetraethoxysilane oligomer, vinylmethyldiethoxysilane-tetramethoxysilane oligomer, and vinylmethyldiethoxysilane-tetraethoxysilane oligomer; amino group-containing copolymers such as 3-aminopropyltrimethoxysilane-tetramethoxysilane copolymer, 3-aminopropyltrimethoxysilane-tetraethoxysilane copolymer, 3-aminopropyltriethoxysilane-tetramethoxysilane copolymer, 3-aminopropyltriethoxysilane-tetraethoxysilane copolymer, 3-aminopropylmethyldimethoxysilane-tetramethoxysilane copolymer, 3-aminopropylmethyldimethoxysilane-tetraethoxysilane copolymer, 3-aminopropylmethyldiethoxysilane-tetramethoxysilane copolymer, and 3-aminopropylmethyldiethoxysilane-tetraethoxysilane copolymer.

The silane compound (G) may be a silane compound represented by the following formula (G1).

[ wherein A represents an alkanediyl group having 1 to 20 carbon atoms or a divalent alicyclic hydrocarbon group having 3 to 20 carbon atoms, -CH constituting the alkanediyl group and the alicyclic hydrocarbon group₂-may be replaced by-O-or-CO-, R⁴¹Represents an alkyl group having 1 to 5 carbon atoms, R⁴²、R⁴³、R⁴⁴、R⁴⁵And R⁴⁶Each independently represents an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms.]

Examples of the alkanediyl group having 1 to 20 carbon atoms represented by A include a methylene group, a 1, 2-ethanediyl group, a 1, 3-propanediyl group, a 1, 4-butanediyl group, a 1, 5-pentanediyl group, a 1, 6-hexanediyl group, a 1, 7-heptanediyl group, a 1, 8-octanediyl group, a 1, 9-nonanediyl group, a 1, 10-decanediyl group, a 1, 12-dodecanediyl group, a 1, 14-tetradecanediyl group, a 1, 16-hexadecanediyl group, a 1, 18-octadecanediyl group and a 1, 20-eicosanediyl group. Examples of the divalent alicyclic hydrocarbon group having 3 to 20 carbon atoms include a 1, 3-cyclopentanediyl group and a 1, 4-cyclohexanediyl group. as-CH constituting the alkanediyl group and the alicyclic hydrocarbon group₂Examples of the group in which-is replaced by-O-or-CO-, include-CH₂CH₂-O-CH₂CH₂-、-CH₂CH₂-O-CH₂CH₂-O-CH₂CH₂-、-CH₂CH₂-O-CH₂CH₂-O-CH₂CH₂-O-CH₂CH₂-、-CH₂CH₂-CO-O-CH₂CH₂-、-CH₂CH₂-O-CH₂CH₂-CO-O-CH₂CH₂-、-CH₂CH₂CH₂CH₂-O-CH₂CH₂-and-CH₂CH₂CH₂CH₂-O-CH₂CH₂CH₂CH₂-。

As R⁴¹～R⁴⁶Examples of the alkyl group having 1 to 5 carbon atoms include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl and pentyl, and R is ⁴²～R⁴⁶Examples of the alkoxy group having 1 to 5 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, an isopropoxy group, a butoxy group, an isobutoxy group, a tert-butoxy group and a pentyloxy group.

Examples of the silane compound represented by the formula (g1) 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, 2-bis (trimethoxysilyl) ethane, 1, 2-bis (triethoxysilyl) ethane, 1, 4-bis (triethoxysilyl) butane, 1, 5-bis (trimethoxysilyl) pentane, 1, 5-bis (triethoxysilyl) pentane, 1, 6-bis (trimethoxysilyl) hexane, Bis (tri-C1-5 alkoxysilyl) C1-10 alkanes such as 1, 8-bis (triethoxysilyl) octane and 1, 8-bis (tripropoxysilyl) octane; bis (di-C1-5 alkoxy C1-5 alkylsilyl) C1-10 alkanes such as bis (dimethoxymethylsilyl) methane, 1, 2-bis (dimethoxymethylsilyl) ethane, 1, 2-bis (dimethoxyethylsilyl) ethane, 1, 4-bis (dimethoxymethylsilyl) butane, 1, 4-bis (dimethoxyethylsilyl) butane, 1, 6-bis (dimethoxymethylsilyl) hexane, 1, 6-bis (dimethoxyethylsilyl) hexane, 1, 8-bis (dimethoxymethylsilyl) octane and 1, 8-bis (dimethoxyethylsilyl) octane; and bis (mono C1-5 alkoxydiC 1-5 alkylsilyl) C1-10 alkanes such as 1, 6-bis (methoxydimethylsilyl) hexane and 1, 8-bis (methoxydimethylsilyl) octane. Among these, bis (tri C1-3 alkoxysilyl) C1-10 paraffins such as 1, 2-bis (trimethoxysilyl) ethane, 1, 3-bis (trimethoxysilyl) propane, 1, 4-bis (trimethoxysilyl) butane, 1, 5-bis (trimethoxysilyl) pentane, 1, 6-bis (trimethoxysilyl) hexane, 1, 8-bis (trimethoxysilyl) octane, and particularly preferably 1, 6-bis (trimethoxysilyl) hexane and 1, 8-bis (trimethoxysilyl) octane are preferable.

The content of the silane compound (G) is usually 0.01 to 20 parts by mass, preferably 0.1 to 10 parts by mass, more preferably 0.15 to 7 parts by mass, still more preferably 0.2 to 5 parts by mass, and particularly preferably 0.25 to 2 parts by mass, based on 100 parts by mass of the resin (A).

The pressure-sensitive adhesive composition may further contain 1 or 2 or more kinds of additives such as an antistatic agent, 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 adhesive layer of the present invention can be formed, for example, as follows: the adhesive composition of the present invention is formed by dissolving or dispersing the adhesive composition in a solvent to prepare a solvent-containing adhesive composition, applying the adhesive composition to the surface of a substrate, drying the adhesive composition, and then irradiating the adhesive composition with active energy rays. The pressure-sensitive adhesive layer of the present invention can also be said to be a photo-cured product of the pressure-sensitive adhesive composition.

The substrate is preferably a plastic film, and specifically, a release film subjected to a release treatment is exemplified. Examples of the release film include: a film obtained by subjecting one surface of a film containing a resin such as polyethylene terephthalate, polybutylene terephthalate, polycarbonate, or polyarylate to a mold release treatment such as a silicone treatment.

The conditions (drying temperature and drying time) for drying the coating film formed from the binder composition containing a solvent may be appropriately set according to the composition and concentration thereof, and are preferably 60 to 150 ℃ for 1 to 60 minutes.

The active energy ray irradiation after drying of the coating film is preferably ultraviolet ray irradiation. The illuminance of the ultraviolet ray to be irradiated is preferably 10mW/cm²～3000mW/cm². The cumulative amount of ultraviolet light is preferably 10mJ/cm²～5000mJ/cm²。

The ultraviolet lamp for irradiating ultraviolet rays may be a mercury lamp, a metal halide lamp, or an LED lamp.

The pressure-sensitive adhesive layer of the present invention is preferably a pressure-sensitive adhesive layer satisfying the following formula (3), and more preferably a pressure-sensitive adhesive layer also satisfying the formula (4).

A(380)≥0.60 (3)

A(380)/A(420)≥5 (4)

A larger value of A (380) indicates a higher absorption at a wavelength of 380 nm. If the value of a (380) is less than 0.60, the absorption at a wavelength of 380nm is low, and deterioration of a member (for example, a display device such as an organic EL element, a liquid crystal retardation film, or the like) which is easily deteriorated by light in the vicinity of ultraviolet rays is likely to occur. The value of a (380) is preferably 0.75 or more, more preferably 0.85 or more, and particularly preferably 1.0 or more. There is no specific upper limit, and it is usually 10 or less.

The value of A (380)/A (420) represents the magnitude of absorption at a wavelength of 380nm relative to the magnitude of absorption at a wavelength of 420nm, and a larger value indicates specific absorption in a wavelength range near ultraviolet rays. The value of a (380)/a (420) is preferably 5 or more, more preferably 20 or more, further preferably 50 or more, and particularly preferably 100 or more.

The thickness of the pressure-sensitive adhesive layer of the present invention is usually less than 200. mu.m, preferably 100 μm or less, more preferably 20 μm or less, still more preferably 12 μm or less than 12 μm, yet still more preferably 10 μm or less, and particularly preferably 7 μm or less. The particle size is usually 0.1 μm or more, preferably 0.5 μm or more, more preferably 1 μm or more, and further preferably 2 μm or more.

According to the present invention, the adhesive layer having a film thickness of less than 12 μm can sufficiently absorb ultraviolet rays, and therefore, is advantageous from the viewpoint of making the display device thin.

The gel fraction of the adhesive layer of the present invention is usually 50 to 99.9 mass%, preferably 60 to 99 mass%, more preferably 70 to 95 mass%, and still more preferably 75 to 90 mass%.

< optical film with adhesive layer >

The adhesive composition of the present invention and the adhesive layer formed from the adhesive composition can be used for, for example, bonding an optical film.

An optical film with an adhesive layer in which an optical film is laminated on at least one surface of the adhesive layer of the present invention is also included in the present invention.

The optical film with an adhesive layer of the present invention can be formed by dissolving or dispersing the adhesive composition in a solvent to prepare a solvent-containing adhesive composition, applying the adhesive composition to the surface of an optical film, drying the adhesive composition, and then irradiating the optical film with an active energy ray. Alternatively, the pressure-sensitive adhesive layer may be formed on the release film in the same manner, and the pressure-sensitive adhesive layer may be laminated (transferred) on the surface of the optical film.

The optical film has optical functions of transmitting, reflecting, and absorbing light. The optical film may be a single-layer film or a multilayer film. Examples of the optical film include a polarizing film, a retardation film, a brightness enhancement film, an antiglare film, an antireflection film, a diffusion film, and a light-collecting film, and a polarizing film, a retardation film, and a laminated film thereof are preferable.

The condensing film is used for the purpose of optical path control or the like, and may be a prism array sheet, a lens array sheet, a sheet provided with a dot matrix, or the like.

The brightness enhancement film is used for the purpose of improving the brightness of a liquid crystal display device to which a polarizing plate is applied. Specifically, there may be mentioned: a reflective polarization separation sheet designed to have a reflectance anisotropy by laminating a plurality of films having different refractive index anisotropies, an alignment film of a cholesteric liquid crystal polymer, a circularly polarized light separation sheet in which an alignment liquid crystal layer thereof is supported on a base film, and the like.

The polarizing film is a film having the following properties: the polarizing film is a film that absorbs linearly polarized light having a plane of vibration parallel to the absorption axis thereof and transmits linearly polarized light having a plane of vibration orthogonal to the absorption axis (parallel to the transmission axis), and for example, 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 a dichroic organic dye.

The saponification degree of the polyvinyl alcohol resin is usually 85 mol% to 100 mol%, and preferably 98 mol% or more. The polyvinyl alcohol resin may be modified, and may be, for example, polyvinyl formal, polyvinyl acetal, or the like, which is obtained by modifying an aldehyde. The polymerization degree of the polyvinyl alcohol resin is usually 1000 to 10000, preferably 1500 to 5000.

A film formed of a polyvinyl alcohol resin is generally used as a raw material film of a polarizing film. The polyvinyl alcohol resin can be formed into a film by a known method. The thickness of the raw material film is usually 1 to 150 μm, and preferably 10 μm or more in consideration of ease of stretching and the like.

The polarizing film is produced, for example, by subjecting a raw material film to uniaxial stretching, dyeing the film with a dichroic dye to adsorb the dichroic dye, treating the film with an aqueous boric acid solution, washing the film with water, and finally drying. The thickness of the polarizing film is usually 1 to 30 μm, and from the viewpoint of making the optical film with an adhesive layer thinner, the thickness is preferably 20 μm or less, more preferably 15 μm or less, and particularly 10 μm or less.

The polarizing plate is preferably provided with a protective film on at least one surface of the polarizing film via an adhesive.

As the adhesive, a known adhesive can be used, and an aqueous adhesive or an active energy ray-curable adhesive can be used.

Examples of the aqueous adhesive include conventional aqueous adhesives (for example, adhesives comprising an aqueous polyvinyl alcohol resin solution, aqueous two-component urethane emulsion adhesives, aldehyde compounds, epoxy compounds, melamine compounds, methylol compounds, isocyanate compounds, amine compounds, crosslinking agents such as polyvalent metal salts, and the like). Among them, an aqueous adhesive comprising a polyvinyl alcohol resin aqueous solution can be suitably used. In the case of using the water-based adhesive, it is preferable to perform a drying step after the polarizing film and the protective film are bonded to each other in order to remove water contained in the water-based adhesive. After the drying step, a curing step of curing at a temperature of, for example, about 20 to 45 ℃ may be provided. The adhesive layer formed of the aqueous adhesive is usually 0.001 to 5 μm.

The active energy ray-curable adhesive is an adhesive which is cured by irradiation with an active energy ray such as an ultraviolet ray or an electron ray, and examples thereof include a curable composition containing a polymerizable compound and a photopolymerization initiator, a curable composition containing a photoreactive resin, a curable composition containing a binder resin and a photoreactive crosslinking agent, and the like, and an ultraviolet ray-curable adhesive is preferable.

Examples of the method for bonding the polarizing film to the protective film include: and a method of performing a surface activation treatment such as saponification treatment, corona treatment, and plasma treatment on at least one of the surfaces to be bonded. When the protective films are laminated on both surfaces of the polarizing film, the adhesives used for laminating these resin films may be the same type of adhesive or different types of adhesives.

The protective film is preferably a film made of a thermoplastic resin having transparency. Specifically, examples include polyolefin-based resins; a cellulose-based resin; a polyester resin; (meth) acrylic resins; or mixtures, copolymers, etc. thereof. When protective films are provided on both sides of the polarizing film, the protective films used may be films containing different thermoplastic resins or films containing the same thermoplastic resin.

When a protective film is laminated on at least one surface of the polarizing film, the protective film is preferably a protective film containing a polyolefin resin or 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 characteristics of the polarizing film. The protective film may be an oxygen barrier layer.

A preferred polarizing plate is one in which a protective film is laminated on at least one surface of a polarizing film via an adhesive layer. When the protective film is laminated on only one surface of the polarizing film, it is more preferably laminated on the visible side. The protective film laminated on the visible side is preferably a protective film containing a triacetyl cellulose resin or a cycloolefin resin. The protective film may be an unstretched film or may be stretched in any direction to have a retardation. The surface of the protective film laminated on the visible side may be provided with a surface treatment layer such as a hard coat layer or an antiglare layer.

When the protective films are laminated on both sides of the polarizing film, the protective film on the panel side (the side opposite to the visible side) is preferably a protective film or a retardation film comprising a triacetyl cellulose resin, a cycloolefin resin, or an acrylic resin. The retardation film may be a zero retardation film described later.

The retardation film is an optical film exhibiting optical anisotropy, and examples thereof include: and stretched films obtained by stretching a polymer film containing polyvinyl alcohol, polycarbonate, polyester, polyarylate, polyimide, polyolefin, polycycloolefin, polystyrene, polysulfone, polyethersulfone, polyvinylidene fluoride/polymethyl methacrylate, acetyl cellulose, a saponified ethylene-vinyl acetate copolymer, polyvinyl chloride, or the like by a factor of about 1.01 to 6. Among the stretched films, a polymer film obtained by uniaxially or biaxially stretching an acetyl cellulose, polyester, polycarbonate film, or cycloolefin resin film is preferable. The retardation film may be one in which a liquid crystalline compound is applied to a substrate and aligned to exhibit optical anisotropy.

In the present specification, the retardation film includes a zero retardation film, and includes films such as a uniaxial retardation film, a low photoelastic coefficient retardation film, and a wide-angle retardation film.

The zero retardation film is an optically isotropic film having a front retardation Re and a retardation Rth in the thickness direction of-15 to 15 nm. The zero retardation film may be a resin film containing a cellulose-based resin, a polyolefin-based resin (e.g., a chain polyolefin-based resin or a polycycloolefin-based resin), or a polyethylene terephthalate-based resin, and is preferably a cellulose-based resin or a polyolefin-based resin from the viewpoint of easy control of retardation value and easy availability. A zero retardation film may also be used as the protective film. Examples of the zero retardation film include: "Z-TAC" (trade name) sold by Fuji film corporation, "Zero TAC (registered trademark)" sold by Konica Minolta corporation, "ZF-14" (trade name) sold by Nippon Rieger Co., Ltd.

In the optical film of the present invention, the retardation film is preferably a retardation film which exhibits optical anisotropy by application and alignment of a liquid crystalline compound.

Examples of the film exhibiting optical anisotropy by application and alignment of a liquid crystalline compound include the following first to fifth embodiments.

The first mode is as follows: a retardation film in which the rod-like liquid crystal compound is oriented in a horizontal direction with respect to the supporting substrate,

The second mode is as follows: a retardation film in which the rod-like liquid crystal compound is aligned in a direction perpendicular to the supporting substrate,

A third mode: a retardation film in which the orientation direction of the rod-like liquid crystal compound changes in a spiral shape in a plane,

A fourth formula: a retardation film in which a discotic liquid crystal compound is oriented obliquely,

The fifth mode is: a biaxial retardation film in which a discotic liquid crystal compound is aligned in a direction perpendicular to a support base.

For example, the first, second, and fifth embodiments are suitable as optical films used in organic electroluminescent displays. Alternatively, a retardation film of these types may be laminated and used.

When the retardation film is a layer containing a polymer in an aligned state of a polymerizable liquid crystal compound (hereinafter, sometimes referred to as "optically anisotropic layer"), the retardation film preferably has reverse wavelength dispersibility. The reverse wavelength dispersibility is an optical property that a retardation value in a liquid crystal alignment plane at a short wavelength is smaller than that at a long wavelength, and it is preferable that the retardation film satisfies the following formulas (7) and (8). Re (λ) represents an in-plane phase difference value with respect to light having a wavelength λ nm.

Re(450)/Re(550)≤1 (7)

1≤Re(630)/Re(550) (8)

In the optical film of the present invention, when the retardation film is of the first aspect and has reverse wavelength dispersibility, coloration in black display in a display device is reduced, and therefore, it is preferable that 0.82. ltoreq. Re (450)/Re (550). ltoreq.0.93 is more preferable in the above formula (7). Furthermore, 120. ltoreq. Re (550). ltoreq.150 is preferred.

Examples of the polymerizable liquid crystal compound in the case where the retardation film is a film having an optically anisotropic layer include: examples of the polymerizable liquid crystal compounds include compounds having a polymerizable group among compounds described in "3.8.6 network (completely crosslinked type)" and "6.5.1 liquid crystal material b" which are available from "liquid crystal materials" published by the editorial committee for liquid crystal accessibility (12 years, 10 months, 30 days) "and" polymerizable nematic liquid crystal materials ", and polymerizable liquid crystal compounds described in japanese patent application laid-open nos. 2010-31223, 2010-270108, 2011-6360, 2011-207765, 2011-162678, 2016-81035, international publication nos. 2017/043438 and 2011-207765.

Examples of a method for producing a retardation film from a polymer in an aligned state of a polymerizable liquid crystal compound include the method described in jp 2010-31223 a.

In the case of the second mode, the front phase difference Re (550) may be adjusted to a range of 0 to 10nm, preferably 0 to 5nm, and the phase difference R in the thickness direction_thIt is adjusted to a range of-10 to-300 nm, preferably-20 to-200 nm. Thickness-direction phase difference value R representing thickness-direction refractive index anisotropy_thThe phase difference value R can be measured by tilting the fast axis in the plane by 50 degrees₅₀Phase difference value R from plane₀And (6) calculating. Namely, the phase difference value R in the thickness direction_thCan be calculated as follows: according to in-plane phaseDifference R₀And a phase difference value R measured by tilting the fast axis by 50 degrees while the fast axis is used as the tilt axis₅₀Thickness d of retardation film, and average refractive index n of retardation film₀N is obtained by the following equations (10) to (12)_x、n_yAnd n_zThen, they are calculated by substituting them into the formula (9).

R_th＝[(n_x+n_y)/2-n_z]×d (9)

R₀＝(n_x-n_y)×d (10)

R₅₀＝(n_x-n_y')×d/cos(φ) (11)

(n_x+n_y+n_z)/3＝n₀ (12)

Here, the number of the first and second electrodes,

φ＝sin^-1[sin(40°)/n₀]

n_y'＝n_y×n_z/[n_y ²×sin²(φ)+n_z ²×cos²(φ)]^1/2

examples of the film exhibiting optical anisotropy by application and alignment of a liquid crystalline compound and the film exhibiting optical anisotropy by application of an inorganic layered compound include: a FILM called a temperature compensation type phase difference FILM, "NH FIL M" (trade name; obliquely oriented FILM of rod-like liquid crystal) sold by JX Nikki Stone energy Co., Ltd, "WV FILM" (trade name; obliquely oriented FILM of discotic liquid crystal) sold by Fuji FILM Co., Ltd, "VAC FILM" (trade name; completely biaxially oriented FILM) sold by Sumitomo chemical Co., Ltd, "new VAC FILM" (trade name; biaxially oriented FILM) sold by Sumitomo chemical Co., Ltd, and the like.

The retardation film may be a multilayer film having two or more layers. Examples thereof include: a film obtained by laminating a protective film on one or both surfaces of a retardation film, or a film obtained by laminating two or more retardation films with an adhesive or a bonding agent interposed therebetween.

Fig. 1 to 5 show examples of the layer structures of a laminate in which a release film is provided on the pressure-sensitive adhesive layer of the present invention, an optical film with a pressure-sensitive adhesive layer of the present invention, and an optical laminate.

The laminate 10 shown in fig. 1 having a release film provided on the pressure-sensitive adhesive layer is in a state in which a release film (separator) 2 is bonded to the pressure-sensitive adhesive layer 1 surface in order to temporarily protect the pressure-sensitive adhesive layer 1 surface formed of the pressure-sensitive adhesive composition of the present invention.

The optical film with an adhesive layer 10A shown in fig. 2 is an optical film with an adhesive layer including a protective film 3, an adhesive layer 4, a polarizing film 5, an adhesive layer 1 formed of the adhesive composition of the present invention, and a release film 2. The protective film 3, the adhesive layer 4, and the polarizing film 5 constitute a polarizing plate 100 (optical film 40). The protective film 3 may have a phase difference. Further, a hard coat layer or the like may be further stacked on the protective film 3.

The optical film with an adhesive layer 10B shown in fig. 3 is an optical film with an adhesive layer including a protective film 3, an adhesive layer 4, a polarizing film 5, an adhesive layer 7, a protective film 6, an adhesive layer 1 formed of the adhesive composition of the present invention, and a retardation film 8. The protective film 3, the adhesive layer 4, the polarizing film 5, the adhesive layer 7, and the protective film 6 constitute a polarizing plate 100 (optical film 40).

The optical laminate 10C shown in fig. 4 and the optical laminate 10D shown in fig. 5 are optical laminates including a protective film 3, an adhesive layer 4, a polarizing film 5, an adhesive layer 1 formed from the adhesive composition of the present invention, a retardation film 110 (optical film 40), an adhesive layer 1a, and a light-emitting element 30 (liquid crystal cell, organic EL cell). The protective film 3, the adhesive layer 4, and the polarizing film 5 constitute a polarizing plate 100 (optical film 40). The pressure-sensitive adhesive layer 1a may be a pressure-sensitive adhesive layer formed from a known pressure-sensitive adhesive composition, or may be a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition of the present invention.

When the retardation film shown in fig. 4 and 5 is a multilayer film, examples thereof include: as shown in fig. 4, the retardation film 110 (optical film 40) includes a 1/4 wavelength retardation layer 70 that gives a retardation of 1/4 wavelengths to transmitted light and a 1/2 wavelength retardation layer 50 that gives a retardation of 1/2 wavelengths to transmitted light, which are laminated via an adhesive layer or pressure-sensitive adhesive layer 60. As shown in fig. 5, a retardation film 110 (optical film 40) in which an 1/4 wavelength retardation layer 50a and a positive C layer 80 are laminated with an adhesive layer or pressure-sensitive adhesive layer 60 interposed therebetween may be included.

The 1/4 wavelength retardation layer 70 that gives a retardation of 1/4 wavelengths in fig. 4 and the 1/2 wavelength retardation layer 50 that gives a retardation of 1/2 wavelengths in fig. 4 may be the optical film of the first embodiment or the optical film of the fifth embodiment. In the case of the configuration of fig. 4, at least one of them is more preferably the fifth aspect.

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

< liquid Crystal display device >

The pressure-sensitive adhesive composition of the present invention and the optical film with a pressure-sensitive adhesive layer, which includes the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition, can be used in display devices such as organic EL display devices and liquid crystal display devices in the form of an optical laminate that is laminated on a display device such as an organic EL device or a liquid crystal cell.

Examples

The present invention will be further specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples. In the examples,% and parts indicating the content or amount used are based on mass unless otherwise specified.

Synthesis example 1 Synthesis of Compound represented by formula (UVA-1)

A500 mL four-necked flask equipped with a Dimroth (Dimroth) condenser and a thermometer was placed in a nitrogen atmosphere, and 20 parts of damascenone (Dimedone), 11.2 parts of pyrrolidine and 200 parts of toluene were charged and stirred under reflux for 5 hours. The solvent was distilled off from the obtained mixture, and purification was performed to obtain 27.4 parts of a compound represented by the formula (M-3).

1.0 part of the obtained compound represented by the formula (M-3), 2.8 parts of p-toluenesulfonylcyanide and 10 parts of acetonitrile were mixed under a nitrogen atmosphere. The resulting mixture was stirred at 0-5 ℃ for 5 hours. The solvent was distilled off from the obtained mixture, and purification was performed to obtain 0.6 part of a compound represented by the formula (M-4).

4.8 parts of a compound represented by the formula (M-4), 4.6 parts of methyl trifluoromethanesulfonate and 24 parts of acetonitrile were mixed under a nitrogen atmosphere, and the mixture was stirred at 20 to 30 ℃ for 3 hours. To the resulting mixture, 1.9 parts of malononitrile, 3 parts of triethylamine and 24 parts of acetonitrile were added, and the mixture was stirred at 20 to 30 ℃ for 3 hours. The solvent was distilled off from the obtained mixture, and the mixture was purified to obtain 2.9 parts of a compound represented by the formula (UVA-1) (hereinafter, sometimes referred to as compound (UVA-1)).

Performing LC-MS measurements and¹the formation of compound (UVA-1) was confirmed by H-NMR analysis.

¹H-NMR(CDCl₃)δ：0.99(s、6H)、1.90-1.96(m、4H)、2.48-2.51(m、4H)、3.70-3.88(dt、4H)

LC-MS；[M+H]⁺＝267.5

< measurement of maximum absorption wavelength and molar absorptivity. epsilon. >

The obtained 2-butanone solution (0.006g/L) of the compound (UVA-1) was added to a 1cm quartz cuvette, which was set in a spectrophotometer UV-2450 (Shimadzu corporation), and the absorbance in the wavelength range of 300 to 800nm was measured in units of 1nm step by the two-beam method. The molar absorption coefficient for each wavelength was calculated from the obtained absorbance value, the concentration of the compound (UVA-1) in the solution, and the optical path length of the quartz cuvette.

ε(λ)＝A(λ)/CL

[ in the formula, [ epsilon ] (. lambda.) ] represents the molar absorption coefficient (L/(g. cm)) of the compound (UVA-1) at a wavelength of [ lambda. ] nm, A (. lambda.) ] represents the absorbance at a wavelength of [ lambda. ] nm, C represents the concentration (g/L) of the compound (UVA-1) in a solution, and L represents the optical path length (cm) of a quartz cuvette. ]

The maximum absorption wavelength of the resulting compound (UVA-1) was 380.2 nm. The compound (UVA-1) obtained had ε (380) of 184.8L/(g.cm), ε (420) of 0.5L/(g.cm) and ε (380)/ε (420) of 369.6.

(polymerization example 1): preparation of acrylic resin (A1)

A reaction vessel equipped with a condenser, a nitrogen inlet, a thermometer and a stirrer was charged with a mixed solution of 81.8 parts of ethyl acetate, 96 parts of butyl acrylate, 3 parts of 2-hydroxyethyl methyl acrylate and 1 part of acrylic acid as a solvent, and the internal temperature was raised to 55 ℃ while replacing the air in the apparatus with nitrogen gas to remove oxygen. Then, a solution of azobisisobutyronitrile (polymerization initiator) in 10 parts of ethyl acetate was added in an amount of 0.14 part by weight in total. After the initiator was added, the temperature was maintained for 1 hour, ethyl acetate was continuously added into the reaction vessel at an addition rate of 17.3 parts/hour while maintaining the internal temperature at 54 to 56 ℃, the addition of ethyl acetate was stopped when the concentration of the acrylic resin reached 35%, and the temperature was maintained at this temperature for 12 hours from the start of the addition of ethyl acetate. Finally, ethyl acetate was added to adjust the concentration of the acrylic resin to 20%, to prepare an ethyl acetate solution of the acrylic resin. The weight average molecular weight Mw of the obtained acrylic resin was 147 ten thousand in terms of polystyrene based on GPC, and Mw/Mn was 5.5. This was used as an acrylic resin (A1). The obtained acrylic resin (A1) did not exhibit maximum absorption in the wavelength range of 300nm to 780 nm.

(example 1): production of adhesive composition (1)

A crosslinking agent (F) (product name: CORO NATE L; manufactured by Tosoh Corp., Ltd., isocyanate-based compound; solid content: 75%) 0.3 part, a silane compound (G) (product name: KBM 3066; manufactured by shin-Etsu chemical Co., Ltd.), a radically curable component (E) (product name: A-DPH-12E; manufactured by Newzhou chemical Co., Ltd., Japan, hexafunctional (meth) acrylate-based compound) 10 part, an initiator (D) (product name: NCI-730; manufactured by ADEKA Co., Ltd., a photo radical generator as an oxime ester-based compound) 1.5 part, a photo selective absorption compound (B) (compound (UVA-1)1.5 part), a photo selective absorption compound (C) (product name: manufactured by Daguozhou Kagaku Co., Ltd., product name: RU-93 "; RU) were mixed with 100 parts of a solid content of an ethyl acetate solution (resin (A1) as a resin (A), and a photo selective absorption compound (C) (product name: Nakawa) (product name: NCI-93" 2- [2 '-hydroxy-5' - (methacryloyloxyethyl) phenyl ] benzotriazole) in 10 parts, and ethyl acetate was added thereto so that the solid content concentration became 14%, thereby obtaining an adhesive composition (1). The amount of the crosslinking agent is the mass part based on the active ingredient.

Examples 2 to 12 and comparative examples 1 to 7

Adhesive compositions (2) to (19) were prepared in the same manner as in example 1, except that the components and the contents thereof were changed as shown in table 1 or table 2. The amount of the crosslinking agent is the mass part based on the active ingredient, and the acrylic resin (a1) is the mass part of the solid content.

[ Table 1]

[ Table 2]

The abbreviations in table 1 and table 2 represent the following substances, respectively. Incidentally,. epsilon. (. 380) and. epsilon. (420) of SB107, SB707, KB111 and EU-1990 were measured by the same methods as described above.

< resin (A) >

Acrylic resin (a 1): the acrylic resin (A1) prepared in polymerization example 1

< light selective absorption Compound (B) >

Compound (UVA-1): compound represented by formula (UVA-1) synthesized in Synthesis example 1

< light selective absorbing resin (C) >

RUVA-93: available from Otsuka chemical Co., Ltd., ultraviolet absorber, trade name: RUVA-93, STRONG ABSORPTION WAVELENGTH. lamda.max. 337nm, COMPOUND HAVING POLYMERIZABLE GROUP AND BENZOTRIAZOLE FRAMEWORK IN MOLECULE

< initiator (D) >

NCI-730: product name manufactured by ADEKA corporation: NCI-730, oxime ester photoradical generator

PBG 3057: TRONLY (New electronic Material, Heizhou, China), trade name: TR-PBG-3057, oxime ester photoradical generator

< radically curable component (E) >

A-DPH-12E: trade name manufactured by shinkamura chemical industry co: A-DPH-12E, hexafunctional (meth) acrylate compounds

< crosslinking agent (F) >

CORONATE L: trade name of Tosoh corporation: CORONATE L, ISOCYANATE-BASED CROSS-LINKER

< silane Compound (G) >

KBM 3066: trade name manufactured by shin-Etsu chemical industries, Ltd.: KBM3066 silane coupling agent

< ultraviolet absorber >

SB 107: an ultraviolet absorber having no merocyanine structure, manufactured by Shipro chemical corporation, trade name: SEESORB107, maximum absorption wavelength λ max 350nm, ε (380) 22.4, ε (420) 1.6, ε (380)/ε (420) 14.0

SB 707: an ultraviolet absorber having no merocyanine structure, manufactured by Shipro chemical corporation, trade name: SEESORB707, maximum absorption wavelength λ max 343nm, ε (380) 5.8, and ε (420) 0

KB 111: an ultraviolet absorber having no merocyanine structure, manufactured by Chemipro chemical corporation, trade name: KEMISORB111, maximum absorption wavelength λ max of 328nm, ε (380) of 9.8, and ε (420) of 0

EU-1990: ultraviolet absorbers having no merocyanine structure, manufactured by EUTEC CHEMICAL corporation, have a maximum absorption wavelength λ max of 373nm, an ∈ (380) of 123.9, an ∈ (420) of 7.5, and ∈ (380)/an ∈ (420) of 16.5

< preparation of adhesive layer >

Each of the adhesive compositions prepared above was applied to a release-treated surface of a release film formed of polyethylene terephthalate film (trade name "PLR-382190" obtained from linetec corporation) subjected to release treatment so that the thickness after drying was 5 μm using an applicator (applicator), and dried at 100 ℃ for 1 minute. Then, an ultraviolet irradiation apparatus (an "electrodeless UV lamp system H ball (bulb)", manufactured by Fusion UV Systems) was used to irradiate the pressure-sensitive adhesive layer (pressure-sensitive adhesive sheet) with ultraviolet light from the side of the separator while adjusting the UV-a (wavelength 320 to 390nm) to an illuminance of 500mW and a cumulative light amount of 500 mJ.

< measurement of Absorbance of pressure-sensitive adhesive layer >

Each of the obtained pressure-sensitive adhesive layers was bonded to glass, and after peeling off the separator, a cycloolefin polymer (COP) film (ZF-14, manufactured by japan regent corporation) was bonded to the pressure-sensitive adhesive layer, thereby producing a laminate having a structure of COP film/pressure-sensitive adhesive layer/glass. The laminate thus prepared was mounted on a spectrophotometer UV-2450 (Shimadzu corporation), and the absorbance was measured by the two-beam method at a wavelength of 300 to 800nm in 1nm steps. The absorbance a (300) at a wavelength of 300nm, the absorbance a (330) at a wavelength of 330nm, the absorbance a (350) at a wavelength of 350nm, the absorbance a (380) at a wavelength of 380nm, and the absorbance a (420) at a wavelength of 420nm of the adhesive layer thus prepared are shown in table 3. The absorbance of the glass and the absorbance of the COP film at the wavelengths of 300m, 330nm, 350nm, 380nm and 420nm were all 0. The results are shown in Table 3.

< evaluation of bleed resistance of adhesive layer >

A separator was further laminated on the surface of the obtained pressure-sensitive adhesive layer to obtain a pressure-sensitive adhesive layer of a double-sided separator. The adhesive layer of the double-sided separator obtained was stored in air at 23 to 25 ℃ for 1 month. The pressure-sensitive adhesive layer of the double-sided separator after storage was checked by microscope for the presence or absence of crystal deposition of the compound in the plane. When no crystal was precipitated, the sample was indicated as "O", and when crystal was precipitated, the sample was indicated as "X". The evaluation results are shown in Table 3.

[ Table 3]

	A(300)	A(330)	A(350)	A(380)	A(420)	Resistance to bleed-out
							Example 1	3.31	3.82	3.74	1.79	0.02	○
Example 2	3.10	3.50	3.74	2.20	0.02	○
							Example 3	3.00	3.42	4.04	2.54	0.02	○
Example 4	5	5	5	2.97	0.02	○
							Example 5	5	5	5	1.84	0.02	○
Example 6	5	5	5	2.0	0.01	○
							Example 7	5	5	5	2.89	0.02	○
Example 8	5	5	5	3.02	0.02	○
							Example 9	5	5	5	1.7	0.01	○
Example 10	5	5	5	2.04	0.01	○
							Example 11	5	5	5	2.87	0.02	○
Example 12	5	5	5	1.96	0.01	○
							Comparative example 1	2.96	3.29	2.76	0.27	0.004	○
Comparative example 2	5	5	5	2.29	0.03	×
							Comparative example 3	1.27	2.25	2.15	0.33	0.01	×
Comparative example 4	5	5	5	0.58	0.003	○
							Comparative example 5	3.15	5	5	2.02	0.15	○
Comparative example 6	5	5	5	0.45	0.006	×
							Comparative example 7	1.02	1.95	5	4.34	0.41	○

The adhesive compositions of the examples showed good absorbance of 0.60 or more at each of the wavelength 300nm, the wavelength 330nm, the wavelength 350nm and the wavelength 380nm, and showed sufficient ultraviolet absorption performance. In addition, high transmittance with an absorbance at a wavelength of 420nm of less than 0.1 was exhibited. Furthermore, the adhesive composition of the present invention shows good bleeding resistance without precipitation of crystals.

The pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition of the present invention exhibits high absorbance at a wavelength of from 300nm to about 380nm, while transmitting light having a wavelength of 420nm, and therefore has good ultraviolet absorption performance without impairing the color expression of a display device. Further, the bleeding resistance was also good.

The pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition of the present invention has sufficient ultraviolet absorption performance and has good bleeding resistance even in a thin layer having a thickness of less than 12 μm.

Industrial applicability

The adhesive composition of the present invention and the optical film with an adhesive layer comprising the adhesive layer formed from the adhesive composition are suitably used for liquid crystal panels and liquid crystal display devices.

Description of the symbols

1 adhesive layer formed from the adhesive composition of the present invention

1a adhesive layer

2 Release film

10 laminated body

10A, 10B optical film with adhesive layer

10C, 10D optical laminate

3. 6 protective film

4. 7 adhesive layer

5 polarizing film

8 phase difference film

30 light emitting element

40 optical film

70. 50a 1/4 wavelength phase difference layer

60 adhesive layer or adhesive layer

501/2 wavelength phase difference layer

80 positive C layer

100 polarizing plate

110 phase difference film.

Claims

1. An adhesive composition comprising

A resin (A),

2. The adhesive composition of claim 1,

further comprising an initiator (D).

3. The adhesive composition of claim 2,

the initiator (D) is a radical generator.

4. The adhesive composition according to claim 2 or 3,

the initiator (D) is a photo radical generator.

5. The adhesive composition according to any one of claims 2 to 4, wherein,

the initiator (D) is an oxime ester photo-radical generator.

6. The adhesive composition according to any one of claims 1 to 5, wherein,

further comprises a radical-curable component (E).

7. The adhesive composition of claim 6,

the radical-curable component (E) is a (meth) acrylate compound.

8. The adhesive composition according to claim 6 or 7,

the radical-curable component (E) is a polyfunctional (meth) acrylate compound.

9. The adhesive composition according to any one of claims 1 to 8,

further comprising a crosslinking agent (F).

10. The adhesive composition of claim 9,

the crosslinking agent (F) is an isocyanate crosslinking agent.

11. The adhesive composition according to any one of claims 1 to 10,

The glass transition temperature of the resin (A) is 40 ℃ or lower.

12. The adhesive composition of claim 11,

the resin (A) having a glass transition temperature of 40 ℃ or lower is a (meth) acrylic resin.

13. The adhesive composition according to any one of claims 1 to 12,

a light selective absorbing compound (B) which contains a merocyanine structure in the molecule and exhibits maximum absorption at a wavelength of 360nm or more satisfies the following formula (1),

ε(380)≥25 (1)

in the formula (1), ε (380) represents the molar absorption coefficient at a wavelength of 380nm of a light selective absorption compound (B) which contains a merocyanine structure in the molecule and shows a maximum absorption at a wavelength of 360nm or more, and the unit of the molar absorption coefficient is L/(g · cm).

14. The adhesive composition according to any one of claims 1 to 13,

a light selective absorbing compound (B) which contains a merocyanine structure in the molecule and exhibits maximum absorption at a wavelength of 360nm or more satisfies the following formula (2),

ε(380)/ε(420)≥20 (2)

in the formula (2), ε (380) represents an molar absorption coefficient at a wavelength of 380nm of a light selective absorption compound (B) which contains a merocyanine structure in the molecule and shows a maximum absorption at a wavelength of 360nm or more,

ε (420) represents the molar absorption coefficient at a wavelength of 420nm of a light selective absorbing compound (B) which contains a merocyanine structure in the molecule and shows a maximum absorption at a wavelength of 360nm or more.

15. The adhesive composition according to any one of claims 1 to 14,

a light selective absorbing compound (B) containing a merocyanine structure in the molecule and exhibiting maximum absorption at a wavelength of 360nm or more is a compound represented by the formula (Y),

in the formula (Y), the acid anhydride is,

R^Y3、R^Y4and R^Y5Each independently represents an electron withdrawing group,

R^Y1、R^Y2、R^Y6and R^Y7Each independently represents a hydrogen atom, a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group, -SCF₃、-SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms,

-CH contained in the aliphatic or aromatic hydrocarbon group₂-or-CH is optionally substituted by-NR^1A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^2A-、-NR^3A-CO-、-S-、-SO-、-SO₂-、-CF₂-or-CHF-,

R^1A、R^2Aand R^3AEach independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,

R^Y1and R^Y2Optionally linked to each other to form a ring,

R^Y1and R^Y6Optionally linked to each other to form a ring,

R^Y4and R^Y5Optionally joined to each other to form a ring.

16. The adhesive composition according to any one of claims 1 to 14,

the light selective absorbing compound (B) containing a merocyanine structure in the molecule and showing maximum absorption at a wavelength of 360nm or more is a compound having a molecular weight of 3000 or less and having a local structure represented by formula (X),

In the formula (X), ring W¹Represents a ring structure having at least 1 double bond as a constituent of the ring and having no aromatic character,

R³represents a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group, -SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH-optionally substituted by-O-, -S-, -NR ═^1xA-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2xA-、-NR^3xA-CO-、-O-CO-NR^4xA-、-NR^5xA-CO-O-、-NR^6xA-CO-NR^7xA-、-CO-S-、-S-CO-S-、-S-CO-NR^8xA-、-NR^9xA-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10xA-CS-、-NR^11xA-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-，

R^1xA、R^2xA、R^3xA、R^4xA、R^5xA、R^6xA、R^7xA、R^8xA、R^9xA、R^10xAAnd R^11xAEach independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms.

17. The adhesive composition of claim 16,

the compound having a molecular weight of 3000 or less and a partial structure represented by formula (X) is any of a compound represented by formula (I) to a compound represented by formula (VIII),

in the formulae (I) to (VIII),

ring W¹And R³Are meant to have the same meaning as above,

ring W²Ring W³Ring W⁴Ring W⁵Ring W⁶Ring W⁷Ring W⁸Ring W⁹Ring W¹⁰Ring W¹¹And a ring W¹²Each independently represents a ring structure having at least 1 double bond as a constituent of the ring,

ring W¹¹¹Represents a ring having at least 2 nitrogen atoms as a constituent,

Ring W¹¹²And a ring W¹¹³Each independently represents a ring having at least 1 nitrogen atom as a constituent,

R¹、R⁴¹、R⁵¹、R⁶¹、R⁹¹、R¹⁰¹、R¹¹¹、R²、R¹²、R⁴²、R⁵²、R⁶²、R⁷²、R⁸²、R⁹²、R¹⁰²and R¹¹²Each independently represents a hydrogen atom, a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group, -SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH is optionally substituted by-NR^12A-、-SO₂-、-CO-、-O-、-COO-、-OCO-、-CONR^13A-、-NR^14A-CO-、-S-、-SO-、-CF₂-or-CHF-,

R¹³、R²³、R³³、R⁴³、R⁵³、R⁶³、R⁷³、R⁸³、R⁹³、R¹⁰³and R¹¹³Each independently represents a heterocyclic group, a halogen atom, a nitro group, a cyano group, a hydroxyl group, a mercapto group, a carboxyl group or-SF₅、-SF₃、-SO₃H、-SO₂H. An optionally substituted aliphatic hydrocarbon group having 1 to 25 carbon atoms or an optionally substituted aromatic hydrocarbon group having 6 to 18 carbon atoms, -CH contained in the aliphatic hydrocarbon group or the aromatic hydrocarbon group₂-or-CH-optionally substituted by-O-, -S-, -NR ═^1A-、-CO-、-CO-O-、-O-CO-、-O-CO-O-、-CONR^2A-、-NR^3A-CO-、-O-CO-NR^4A-、-NR^5A-CO-O-、-NR^6A-CO-NR^7A-、-CO-S-、-S-CO-S-、-S-CO-NR^8A-、-NR^9A-CO-S-、-CS-、-O-CS-、-CS-O-、-NR^10A-CS-、-NR^11A-CS-S-, -S-CS-, -CS-S-, -S-CS-S-, -SO-or-SO₂-，

R^1A、R^2A、R^3A、R^4A、R^5A、R^6A、R^7A、R^8A、R^9A、R^10A、R^11A、R^12A、R^13AAnd R^14AEach independently represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms,

R⁴、R¹⁴、R²⁴、R³⁴、R⁴⁴、R⁵⁴、R⁶⁴、R⁷⁴、R⁸⁴、R⁹⁴、R¹⁰⁴、R¹¹⁴、R⁵、R¹⁵、R²⁵、R³⁵、R⁷⁵and R⁸⁵Each independently represents an electron withdrawing group,

R¹and R²Optionally bonded to each other to form a ring,

R⁴¹and R⁴²Optionally bonded to each other to form a ring,

R⁵¹and R⁵²Optionally bonded to each other to form a ring,

R⁶¹and R ⁶²Optionally bonded to each other to form a ring,

R⁹¹and R⁹²Optionally bonded to each other to form a ring,

R¹⁰¹and R¹⁰²Optionally bonded to each other to form a ring,

R¹¹¹and R¹¹²Optionally bonded to each other to form a ring,

R²and R³Optionally bonded to each other to form a ring,

R¹²and R¹³Optionally bonded to each other to form a ring,

R⁴²and R⁴³Optionally bonded to each other to form a ring,

R⁵²and R⁵³Optionally bonded to each other to form a ring,

R⁶²and R⁶³Optionally bonded to each other to form a ring,

R⁷²and R⁷³Optionally bonded to each other to form a ring,

R⁸²and R⁸³Optionally bonded to each other to form a ring,

R⁹²and R⁹³Optionally bonded to each other to form a ring,

R¹⁰²and R¹⁰³Optionally bonded to each other to form a ring,

R¹¹²and R¹¹³Optionally bonded to each other to form a ring,

R⁴and R⁵Optionally bonded to each other to form a ring,

R¹⁴and R¹⁵Optionally bonded to each other to form a ring,

R²⁴and R²⁵Optionally bonded to each other to form a ring,

R³⁴and R³⁵Optionally bonded to each other to form a ring,

R⁷⁴and R⁷⁵Optionally bonded to each other to form a ring,

R⁸⁴and R⁸⁵Optionally bonded to each other to form a ring,

R⁶and R⁸Each independently represents a divalent linking group,

R⁷represents a single bond or a divalent linking group,

R⁹and R¹⁰Each independently represents a trivalent linking group,

R¹¹represents a tetravalent linker.

18. An adhesive layer formed from the adhesive composition of any one of claims 1 to 17.

19. The adhesive layer according to claim 18, which satisfies the following formula (3),

A(380)≥0.60 (3)

in the formula (3), A (380) represents the absorbance at a wavelength of 380 nm.

20. The adhesive layer according to claim 18 or 19, which further satisfies the following formula (4),

A(380)/A(420)≥5 (4)

in the formula (4), A (380) represents the absorbance at a wavelength of 380nm, and A (420) represents the absorbance at a wavelength of 420 nm.

21. The adhesive layer according to any one of claims 18 to 20,

the thickness of the adhesive layer is 10 [ mu ] m or less.

22. An optical film with an adhesive layer, wherein,

an optical film laminated on at least one side of the adhesive layer of any one of claims 18 to 21.

23. The optical film with an adhesive layer according to claim 22,

the optical film is a polarizing plate.

24. An image display device comprising the optical film with an adhesive layer according to claim 22 or 23.