KR20170007144A - Curable composition, cured film, bezel and display apparatus - Google Patents

Abstract

Provided is a curable composition which is suitable to form bezels with excellent exterior appearance as well as chemical resistance and heat resistance. To this end, the curable composition includes: (A) a white pigment and a coloring agent including a coloring agent different from the white pigment; (B) a resin; and (C) a polymerizable compound. The content ratio of the coloring agent different from the white pigment ranges from 1 to 2,000 ppm based on the total solid content in the curable composition.

Description

Technical Field [0001] The present invention relates to a curable composition, a cured film, a bezel,

The present invention relates to a curable composition, a cured film, a bezel and a display device, and more particularly to a curable composition used for forming a bezel used in a portable digital terminal, a cured film formed using the curable composition, And a display device including the bezel.

2. Description of the Related Art In recent years, a touch panel has rapidly become popular as a position input device in various portable digital display devices such as smart phones and tablet terminals, and a capacitive multi-touch display capable of mainly performing a plurality of multi-touch operations has become mainstream. In the capacitive touch panel, it has been studied to hide the extraction wiring behind the light shielding layer so that the wiring can not be seen from the user side (see, for example, Patent Document 1).

Nowadays, it is desired to narrow the width of the light-shielding layer (also referred to as the bezel), which is demanded to reduce the size and weight of the display. At present, the light shielding layer is mainly formed by a screen printing method, and it is difficult to form a high-precision pattern for the following reason. That is, there is a problem that the non-contact or scratch of the wiring tends to occur, or bubbles are generated between the wiring lines at the time of forming the wiring line, which may cause erosion of the display screen or corrosion breakage. have.

Therefore, it has been studied to form a light-shielding layer by photolithography using a photosensitive composition. For example, in Patent Documents 2 to 3, it has been proposed to form a black light shielding layer by using a photosensitive composition in which a black pigment is dispersed.

Japanese Patent No. 5199913 Specification Japanese Patent Laid-Open Publication No. 1456599 Japanese Patent Application Laid-Open No. 2013-205474

Conventionally, the light-shielding layer is generally made of black in view of light shielding property, but in recent years, there has been a desire for a white light-shielding layer because of a change in taste. In order to express white, for example, in Patent Documents 2 to 3, when a photosensitive composition is prepared by using a white pigment in place of a black pigment and the white light-shielding layer is formed using the photosensitive composition, the yellowing of the resin component by heat Causing the whiteness to deteriorate. In recent years, a transparent electrode or a protective film for a touch panel is formed on the upper layer of the light shielding layer for the purpose of integrating the touch panel components. When the transparent electrode or the protective film is formed at the time of forming the transparent electrode, the resin component is significantly yellowed Therefore, the production of a white light shielding layer having high whiteness is becoming increasingly difficult.

Further, since it is necessary to etch the metal film after forming the light-shielding layer, the material of the light-shielding layer is also required to have chemical resistance.

In recent years, in order to improve the aesthetics of a further layer, it is required to make a bluish white light shielding layer, not simply a white light shielding layer. In order to produce a bluish white light-shielding layer, it is considered that a blue or violet coloring agent may be added to the photosensitive composition for forming a white light-shielding layer. Such a coloring agent is liable to be discolored or changed in color by heat treatment, Is required.

It is strongly desired to provide a photosensitive composition that satisfies all of the above-described requirements.

Accordingly, an object of the present invention is to provide a curable composition which is excellent in aesthetics and is suitable for forming a bezel having excellent chemical resistance and heat resistance. Another object of the present invention is to provide a cured film formed using the curable composition, a bezel having the cured film, and a display device having the bezel.

As a result of intensive studies, the present inventors have found that the above problems can be solved by using a specific colorant.

That is, the present invention relates to a curable composition comprising (A) a colorant containing a white pigment and a colorant different from a white pigment, (B) a resin, and (C) a polymerizable compound, Is in the range of 1 to 2000 ppm based on the total solids in the curable composition.

The present invention also provides a cured film formed using the curable composition, a bezel having the cured film, and a display device including the bezel.

By using the curable composition of the present invention, a bezel excellent in aesthetics and excellent in chemical resistance and heat resistance can be formed.

Therefore, the curable composition of the present invention can be suitably used for manufacturing a display device including a portable digital display device such as a smart phone or a tablet terminal.

First, the main terms used in the present invention will be described.

(Shading layer (bezel))

The light-shielding layer has a function of preventing the appearance of the display device from being damaged by hiding the wiring and the control circuit in the outer periphery of the position detection area (touch panel portion) at the center of the display device so as not to be seen. Therefore, the light shielding layer is required to have a light shielding property for hiding unnecessary parts.

(Bluish white)

The bluish white in the present invention means that the lightness index (L ^* ) is 82 or more, the chromatic index (a ^* ) is -3 or more and 2 or less, and the chromatic index (b ^* ) is -8 And less than zero. The above three properties of the L ^* a ^* b ^* colorimetric system can be measured by a commercially available spectrophotometric colorimeter, a spectrophotometer or the like.

Next, the present invention will be described in detail.

Curable composition

- (A) Colorant -

Examples of the white pigment contained in the curable composition of the present invention (A) as a colorant include calcium carbonate, lead carbonate, barium carbonate, barium sulfate, lead sulfate, lead phosphate, zinc phosphate, titanium oxide, aluminum oxide, And may be selected from zinc oxide, antimony oxide, zirconium oxide, tin oxide, strontium sulfide, strontium sulfide, strontium titanate, barium tungstate, lead metasilicate, talc, kaolin, clay, bismuth chloride, calcium hydroxide and hollow silica.

As the white pigment, there can be mentioned, for example, a compound classified as a pigment in a color index (CI, published by The Society of Dyers and Colourists), that is, a color index (CI) number given below .

C.I. Pigment White 1, C.I. Pigment White 2, C.I. Pigment White 3, C.I. Pigment White 4, C.I. Pigment White 5, C.I. Pigment White 6, C.I. Pigment White 6: 1, C.I. Pigment White 7, C.I. Pigment White 8, C.I. Pigment White 10, C.I. Pigment White 11, C.I. Pigment White 12, C.I. Pigment White 13, C.I. Pigment White 14, C.I. Pigment White 15, C.I. Pigment White 16, C.I. Pigment White 17, C.I. Pigment White 18, C.I. Pigment White 18: 1, C.I. Pigment White 19, C.I. Pigment White 20, C.I. Pigment White 21, C.I. Pigment White 22, C.I. Pigment White 23, C.I. Pigment White 24, C.I. Pigment White 25, C.I. Pigment White 26, C.I. Pigment White 27, C.I. Pigment White 28, C.I. Pigment White 30, C.I. Pigment White 32, C.I. Pigment White 33.

These white pigments may be used by treating their surfaces with other metals such as alumina, siloxane, zirconia, and zinc oxide.

Among these white pigments, titanium oxide and strontium titanate are preferable from the viewpoint of obtaining a light-shielding layer having a high light shielding property. The crystal form of titanium oxide is preferably a rutile type.

The average particle diameter of the white pigment is usually 100 to 700 nm, but is preferably 180 to 500 nm, more preferably 200 to 300 nm from the viewpoint of storage stability of the light-shielding and curable composition.

The curable composition of the present invention comprises (A) a colorant different from a white pigment (hereinafter also referred to as " another colorant ") as a colorant. The content of the other coloring agent should be 1 to 2000 ppm based on the total solid content in the curable composition, preferably 100 to 1300 ppm, more preferably 100 to 1100 ppm, and even more preferably 150 to 700 ppm. According to this form, a cured film having excellent brightness can be formed, and further, a cured film having excellent brightness and chemical resistance can be formed.

It is preferable to use fluorescent dyes, blue dyes, purple dyes, red dyes, blue pigments, purple pigments, red pigments and the like from the color of the other colorants. As these pigments, organic pigments and inorganic pigments can be used. Specifically, there can be mentioned compounds classified as pigments in the color index.

Other coloring agents can be selected from the structure thereof such as perylene dye, anthraquinone dye, triarylmethane dye, phthalocyanine dye, xanthene dye, dipyrromethene dye, phthalocyanine pigment, dioxazine pigment, quinacridone pigment, azo pigment, anthraquinone A pigment, a perylene pigment, and the like can be used. Among them, from the viewpoint of forming a cured film having excellent lightness, it is preferable to be one of the following i) to iv).

(I) at least one selected from the group consisting of perylene dye, anthraquinone dye, xanthene dye and dipyramethylene dye,

Ii) a combination of a phthalocyanine dye and at least one member selected from the group consisting of a perylene dye, a xanthene dye, and a dipyramethylene dye,

Iii) a combination of a triarylmethane dye and at least one selected from xanthene dyes and dipyramethine dyes,

Iv) a combination of a phthalocyanine pigment and a xanthene dye.

The present inventors have found that when titanium oxide is used as a white pigment and a pigment is used as another colorant, pigments which are other coloring agents are sometimes discolored by a high-temperature bake in a cured film forming step. Although this cause is not clear, the present inventors presume that the catalytic action of titanium oxide may be the cause. When the content ratio of the other coloring agent is small, for example, when the total solid content in the curing composition is not more than 1100 ppm, particularly not more than 700 ppm, discoloration of other coloring agent is easy to see visually. Therefore, it is preferable that other coloring agents include dyes such as blue dyes, purple dyes and red dyes, and it is preferable that the dyes are contained in an amount of 50% by mass or more, more preferably 80% by mass, based on the total content of the other colorants.

Among other preferable colorants, perylene dyes include, for example, C.I. Solvent Orange 55, Lumogen Yellow 083, Lumogen Orange 240 and Lumogen Red 305 (manufactured by BASF) can be mentioned. Examples of the anthraquinone dyes include the compounds described in paragraphs [0049] to [0064] of JP-A No. 2013-053292, among which C.I. Solvent Blue 35, C.I. Solvent Blue 45, C.I. Acid Blue 80, C.I. Solvent Blue 104, C.I. Solvent Blue 122 is preferred. Examples of the triarylmethane dye include the compounds described in paragraphs [0048] to [0064] of JP-A No. 2013-144724. Examples of the phthalocyanine dyes include the compounds described in paragraphs [0100] to [0188] of Japanese Patent Laid-Open No. 2007-094181, among which C.I. Solvent Blue 38, C.I. Solvent Blue 70 is preferred. Examples of the xanthene dyes include the compounds described in paragraphs [0010] to [0048] of JP-A-2013-053292, among which acidic xanthene dyes are preferable. Examples of the dipyramethylene dyes include compounds described in paragraphs [0017] to [0105] of JP-A No. 2010-085454, paragraphs [0014] to [0095] of JP-A No. 2011-164594 Described compounds, and compounds described in paragraphs [0025] to [0058] of Japanese Patent Application Laid-Open Publication No. 120586/1990.

In the present specification, the term " acidic dye " means an ionic dye in which the anion portion is a chromophore, and an ionic dye forming a salt in a molecule is also included in the acidic dye. For example, "acidic xanthene dye" refers to a compound in which the xanthene chromophore is anionic and has a counter cation, or a xanthene chromophore forms an intramolecular salt.

As the phthalocyanine pigment, C.I. Pigment Blue 15: 3, C.I. Pigment Blue 15: 6, C.I. Pigment Blue 16, C.I. Pigment Blue 79 and the like. Examples of the dioxazine pigment include C.I. Pigment Violet 23, C.I. Pigment Violet 37 and the like. As the quinacridone pigment, C.I. Pigment Violet 19 and the like. As the azo pigment, C.I. Pigment Blue 25, C.I. Pigment Red 15 and the like. The anthraquinone pigments include C.I. Pigment Red 89 and the like. Examples of the perylene pigment include C.I. Pigment Violet 29 and the like.

In the present invention, the white pigment and other pigments may be purified and used by recrystallization, reprecipitation, solvent cleaning, sublimation, vacuum heating, or a combination thereof. These pigments may be used by modifying the surface of the particles thereof with a resin as desired. As the resin for modifying the particle surface of the pigment, for example, a vehicle resin disclosed in Japanese Patent Application Laid-Open No. 2001-108817 or a resin for dispersing various pigments on the market can be mentioned. The organic pigment may also be used by finely pulverizing primary particles by so-called salt milling. As a method of the salt milling, for example, a method disclosed in Japanese Patent Laid-Open No. 08-179111 can be adopted.

In the present invention, a known dispersion auxiliary agent may be further contained in combination with a white pigment and other pigments.

Examples of the dispersing aid include pigment derivatives and the like. Specific examples of the pigment derivative include copper phthalocyanine, diketopyrrolopyrrole, and sulfonic acid derivatives of quinophthalone.

The total content of the white pigment and the other coloring agent is generally 10 to 80% by mass, preferably 30 to 75% by mass, more preferably 40 to 75% by mass, in the solid content of the curable composition in view of forming a bezel excellent in light- By mass, and particularly preferably from 50 to 70% by mass. Here, the solid content is a component other than the solvent described later.

- (B) Resin-

As the resin (B) in the present invention, it is preferable to include a binder resin. The binder resin is preferably a resin having at least one functional group selected from an acidic functional group and a cyclic ether group. Examples of the acidic functional group include a sulfo group, a carboxyl group, a phosphoric acid group, and a phenolic hydroxyl group. The cyclic ether group is preferably a saturated heterocyclic group having an oxygen atom as a heteroatom constituting a heterocycle and a saturated heterocyclic group having 3 to 7 atoms constituting a ring, and examples thereof include oxiranyl, oxetanyl , An alicyclic epoxy group, and a tetrahydrofuranyl group. Here, the "alicyclic epoxy group" refers to an epoxy group formed by bonding one oxygen atom to two adjacent carbon atoms of carbon atoms constituting the alicyclic structure, and examples thereof include 3,4-epoxycyclohexyl group, 3, Epoxy tricyclo [5.2.1.0 ^2,6 ] decan-8-yl group, and 3,4-epoxy tricyclo [5.2.1.0 ^2,6 ] decan-9-yl group.

Among them, the (B) binder resin is preferably a polymer having a carboxyl group, a carboxyl group and a polymer having a cyclic ether group.

The polymer having a carboxyl group can be obtained by polymerizing an ethylenically unsaturated monomer having at least one carboxyl group (hereinafter also referred to as " unsaturated monomer (b1) ") and a copolymerizable ethylenically unsaturated monomer (hereinafter referred to as " unsaturated monomer ), A polymer obtained by reacting a polymer having an ethylenically unsaturated monomer having a hydroxyl group as a monomer unit with a polybasic acid anhydride, and a hydrolysis-condensation product of a silane compound containing a silane monomer having a carboxyl group.

Examples of the unsaturated monomer (b1) include unsaturated monomers such as (meth) acrylic acid, maleic acid, maleic anhydride, succinic acid mono [2- (meth) acryloyloxyethyl], omega-carboxypolycaprolactone mono p-vinylbenzoic acid and the like.

The unsaturated monomers (b1) may be used alone or in combination of two or more.

As the unsaturated monomer (b2), for example,

N-substituted maleimide such as N-phenylmaleimide, N-cyclohexylmaleimide;

Aromatic vinyl compounds such as styrene,? -Methylstyrene, p-hydroxystyrene, p-hydroxy-? -Methylstyrene and acenaphthylene;

Alkyl (meth) acrylates such as methyl (meth) acrylate, n-butyl (meth) acrylate and 2-ethylhexyl (meth) acrylate;

Hydroxyalkyl (meth) acrylates such as 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate;

(Meth) acrylic acid esters of unsaturated alcohols such as vinyl (meth) acrylate and allyl (meth) acrylate;

Aryl (meth) acrylates such as phenyl (meth) acrylate and benzyl (meth) acrylate;

Such as cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, tricyclo [5.2.1.0 ^2,6 ] decan-8-yl (meth) acrylate, and dicyclopentenyl (meth) (Meth) acrylic acid esters having a formula hydrocarbon group;

(Meth) acrylate, polyethylene glycol (polymerization degree 2 to 10), methyl ether (meth) acrylate, polypropylene glycol (polymerization degree 2 to 10) (Meth) acrylic acid esters of polyhydric alcohols such as glycols (degree of polymerization 2 to 10) mono (meth) acrylate, glycerol mono (meth) acrylate;

Cyclohexyl vinyl ether, isobornyl vinyl ether, tricyclo [5.2.1.0 ^2,6 ] decan-8-yl vinyl ether, pentacyclopentadecanyl vinyl ether, 3- (vinyloxymethyl) Vinyl ethers such as;

(Meth) acrylic esters of aryl alcohols such as 4-hydroxyphenyl (meth) acrylate, ethylene oxide modified (meth) acrylate of para-cumylphenol;

A macromonomer having a mono (meth) acryloyl group at the end of a polymer molecular chain such as polystyrene, polymethyl (meth) acrylate, poly-n-butyl (meth) acrylate and polysiloxane.

Examples of the polybasic acid anhydrides include anhydrides of dibasic acids such as maleic anhydride, fumaric anhydride, itaconic anhydride, tetrahydrophthalic anhydride, methyltetrahydrophthalic anhydride, hexahydrophthalic anhydride, methylhexahydrophthalic anhydride, and hymic acid anhydride; Mono-anhydrides of polybasic acids such as trimellitic acid anhydride and tribasic acid; Cyclohexanetetracarboxylic acid dianhydride, and pyromellitic acid dianhydride; and the like.

Among them, as the polymer having a carboxyl group, a copolymer of an unsaturated monomer (b1) and an unsaturated monomer (b2) is preferable. In this case, the unsaturated monomer (b2) preferably contains an aryl (meth) acrylate. The unsaturated monomers (b2) may be used alone or in combination of two or more.

The polymer having a carboxyl group and a cyclic ether group can be obtained by copolymerizing, for example, an unsaturated monomer (b1) and an ethylenically unsaturated monomer having a cyclic ether group (hereinafter also referred to as "unsaturated monomer (b3)") as a monomer unit; A copolymer obtained by reacting an unsaturated monomer (b1) with a part of the oxiranyl group of the copolymer in a copolymer having an ethylenically unsaturated monomer having an oxiranyl group as a monomer unit and further reacting a polybasic acid anhydride; A hydrolytic condensate of a silane compound containing a silane monomer having a carboxyl group and a silane monomer having a cyclic ether group, and the copolymer is obtained by reacting an unsaturated monomer (b2) (except for the unsaturated monomer (b3)) with a monomer It may also have more units. The cyclic ether group is preferably an oxiranyl group, an oxetanyl group or an alicyclic epoxy group, more preferably an oxiranyl group or an oxetanyl group, and particularly preferably an oxylanyl group in view of brightness.

Examples of the ethylenically unsaturated monomer having an oxiranyl group include glycidyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate glycidyl ether, 2-hydroxypropyl (meth) acrylate glycidyl Glycidyl ether such as glycidyl ether, 3-hydroxypropyl (meth) acrylate glycidyl ether, 4-hydroxybutyl (meth) acrylate glycidyl ether, polyethylene glycol-polypropylene glycol (meth) (Meth) acrylic acid ester having a silyl group, a p-vinylbenzyl glycidyl ether having a glycidyl group, and the like.

Examples of the ethylenically unsaturated monomer having an alicyclic epoxy group include compounds represented by the following general formula (1), compounds represented by the following general formula (2) and compounds represented by the following general formula (3) (Meth) acrylic acid esters having an epoxy group.

Examples of the ethylenically unsaturated monomer having an oxetanyl group include oxetane such as 3 - [(meth) acryloyloxymethyl] oxetane and 3 - [(meth) acryloyloxymethyl] (Meth) acrylic acid esters having a silyl group and a silyl group.

Examples of the ethylenically unsaturated monomer having a tetrahydrofuranyl group include (meth) acrylic acid esters having a tetrahydrofuranyl group such as tetrahydrofurfuryl (meth) acrylate.

The unsaturated monomer (b3) may be used singly or in combination of two or more.

(In the formula (1)

R ¹ represents a hydrogen atom or a methyl group,

X ¹ represents a single bond or an alkanediyl group having 1 to 6 carbon atoms which may contain a hetero atom)

(In the formulas (2) and (3)

R ² independently represent a hydrogen atom or a methyl group,

X ² independently represent a single bond or an alkanediyl group having 1 to 6 carbon atoms which may contain a hetero atom)

The alkanediyl group having 1 to 6 carbon atoms in X ¹ and X ² may be linear or branched. Specific examples thereof include a methylene group, an ethylene group, an ethane-1,1-diyl group, a propane-1,1-diyl group, a propane-1,2-diyl group, A butane-1,3-diyl group, a butane-1,4-diyl group, a pentane-1,4-diyl group, a pentane-1,5-di Diyl group, a hexane-1,5-diyl group, and a hexane-1,6-diyl group. Among them, an alkanediyl group having 1 to 4 carbon atoms is preferable, and an alkanediyl group having 1 or 2 carbon atoms is more preferable.

The alkanediyl group having 1 to 6 carbon atoms may contain a heteroatom. Examples of the hetero atom include an oxygen atom, a sulfur atom and a nitrogen atom. Examples of the alkanediyl group containing such a hetero atom include (*) -CH ₂ CH ₂ -O-, (*) - CH _{2 -O-CH 2 -, (*} ) - CH 2 CH 2 -S-, (*) - CH 2 -S-CH 2 -, (*) - CH 2 CH 2 -NH-, (*) - CH 2 -NH-CH ₂ - and the like. (*) Means a bond with -COO-.

Formula (1) include compounds represented by 3,4-epoxycyclohexylmethyl methacrylate (trade name cycle macromer M100, Daicel Kagaku Kogyo Co., Ltd .; the R ¹ group in the formula (1), X ¹ (Wherein R ¹ is a hydrogen atom and X ¹ is a methylene group), 3,4-epoxycyclohexylmethyl acrylate (trade name: CYROMER A400, manufactured by Daicel Chemical Industries, Ltd.) ).

Examples of the compound represented by the formula (2) include compounds represented by the formulas (2-1) to (2-8).

Examples of the compound represented by the formula (3) include compounds represented by the formulas (3-1) to (3-8).

Among them, the unsaturated monomer (b3) is preferably a (meth) acrylic acid ester having a glycidyl group, a (meth) acrylic acid ester having an alicyclic epoxy group, or a (meth) acrylic acid ester having an oxetanyl group from the viewpoint of chemical resistance , A glycidyl (meth) acrylate, a 3,4-epoxycyclohexylmethyl (meth) acrylate, a compound represented by the formula (2-1) and a compound represented by the formula (3-1).

In the copolymer of the unsaturated monomer (b1) and the unsaturated monomer (b2), the copolymerization ratio of the unsaturated monomer (b1) in the copolymer is preferably from 5 to 50 mass%, more preferably from 8 to 30 mass%. By copolymerizing the unsaturated monomer (b1) in such a range, a curable composition having excellent alkali developability and storage stability can be obtained.

The acid value of the resin having an acidic functional group is not particularly limited, but is preferably 95 mgKOH / g or less. In the present specification, acid gauge is the number of mg of KOH required to neutralize 1 g of a solid other than the (F) solvent to be described later.

As specific examples of the copolymer of the unsaturated monomer (b1) and the unsaturated monomer (b2), for example, JP-A-7-140654, JP-A-8-259876, JP-A-10-31308 , Japanese Patent Application Laid-Open Nos. 10-300922, 11-174224, 11-258415, 2000-56118, 2004-101728 And the like.

In the present invention, for example, Japanese Patent Application Laid-Open Nos. 5-19467, 6-230212, 7-207211, 9-325494, and Japanese Patent A carboxyl group-containing polymer having a polymerizable unsaturated bond such as a (meth) acryloyl group in a side chain may be used as a binder resin, as disclosed in JP-A-11-140144 and JP-A-2008-181095 .

In the copolymer having the unsaturated monomer (b1) and the unsaturated monomer (b3) as a monomer unit, the copolymerization ratio of the unsaturated monomer (b1) in the copolymer is preferably 5 to 40% by mass, more preferably 10 to 40% (B1 / b3) of the unsaturated monomer (b1) and the unsaturated monomer (b3) is preferably from 1/9 to 7/3, more preferably from 3/7 to 6/4 to be. By copolymerizing the unsaturated monomer (b1) and the unsaturated monomer (b3) at such a ratio, the light-shielding property and the chemical resistance can be improved in addition to the alkali developability and the storage stability.

The binder resin in the present invention has a weight average molecular weight (Mw) in terms of polystyrene measured by gel permeation chromatography (hereinafter abbreviated as GPC) (elution solvent: tetrahydrofuran) of usually 1,000 to 100,000, preferably 3,000 To 50,000. By adopting such a form, the residual film ratio, pattern shape, heat resistance, electric characteristics and resolution of the coating film are further increased, and generation of dried foreign matter at the time of coating can be suppressed at a high level.

The ratio (Mw / Mn) of Mw to number average molecular weight (Mn) of the binder resin in the present invention is preferably 1.0 to 5.0, more preferably 1.0 to 3.0. The term "Mn" as used herein refers to the number average molecular weight in terms of polystyrene measured by GPC (elution solvent: tetrahydrofuran).

The binder resin in the present invention can be produced by a known method. For example, Japanese Unexamined Patent Application Publication No. 2003-222717, Japanese Patent Application Laid-Open No. 2006-259680, International Publication No. 2007/029871 Its structure, Mw, and Mw / Mn can be controlled by the disclosed method.

In the present invention, the binder resins may be used alone or in combination of two or more.

In the present invention, the content of the binder resin is usually 1 to 100 parts by mass, and preferably 5 to 50 parts by mass, based on 100 parts by mass of the total amount of the white pigment and optionally other colorants. By adopting such a shape, a bezel excellent in light shielding property, heat resistance, and chemical resistance can be formed.

As the resin (B) in the present invention, a dispersion system is preferable.

Examples of the known dispersant include urethane-based dispersants, polyethyleneimine-based dispersants, polyoxyethylene alkyl ether-based dispersants, polyoxyethylene alkyl phenyl ether-based dispersants, polyethylene glycol diester dispersants, sorbitan fatty acid ester- Dispersants, (meth) acrylic dispersants, phosphoric acid ester dispersants and the like. Disperbyk -2000, Disperbyk -2001, Disperbyk-182, Disperbyk-184, BYK-LPN 6919, BYK-LPN21116 (above, Disperbyk-162, Disperbyk-165, Disperbyk-167, Disperbyk-167, and Disperbyk-167 (manufactured by BYK) ) -170, Disperbyk-182 (manufactured by BYK), Sorbus 76500 (manufactured by Lubrizol Co., Ltd.), Sorbus 24000 (Lubrizol ), Polyester dispersants such as Ajisper PB821, Ajisper PB822, Ajisper PB880 and Ajisper PB881 (manufactured by Ajinomoto Pine Techno Co., Ltd.), and dispersing agents such as Disperbyk, -110 and Disperbyk-180, and BYK-LPN21324 (manufactured by BYK) can be used.

Among them, at least one kind selected from the group consisting of a (meth) acrylic dispersant, a phosphoric ester dispersant, a urethane dispersant and a polyester dispersant is preferable from the viewpoint of improvement of the storage stability, and a (meth) And an ester-based dispersing agent.

The dispersant preferably has an acid value of 30 to 200 mgKOH / g or an amine value of 40 to 200 mgKOH / g from the viewpoint of improvement of storage stability. From the viewpoint of dispersibility of the colorant, the acid value is more preferably 40 to 100 mgKOH / g, and the amine value is more preferably 60 to 180 mgKOH / g. Here, in the present invention, "amine value" means the number of mg of KOH equivalent to HCl required for neutralizing 1 g of solid content.

In the present invention, the dispersant may be used alone or in combination of two or more. (Meth) acrylic dispersant is preferably contained in an amount of not less than 50% by mass, more preferably not less than 70% by mass based on the total amount of the dispersing agent desirable. By using this form, it becomes easy to obtain a curable composition having more excellent storage stability.

In the present invention, the content of the dispersing agent is generally 0.5 to 50 parts by mass, preferably 2 to 30 parts by mass based on 100 parts by mass of the total amount of the white pigment and the other coloring agent. By using this form, a curable composition having excellent storage stability can be formed.

The curable composition of the present invention preferably contains a binder resin and a dispersant as the resin (B), and the total content of the binder resin and the dispersant is 2 to 150 parts by mass, preferably 2 to 100 parts by mass, per 100 parts by mass of the total of (A) 10 to 70 parts by mass.

- (C) Polymerizable compound -

The polymerizable compound in the present invention refers to a compound having two or more polymerizable groups. However, the resin (B) is excluded. Examples of the polymerizable group include an ethylenic unsaturated group, an oxiranyl group, an oxetanyl group and an N-alkoxymethylamino group. In the present invention, as the polymerizable compound, a compound having two or more (meth) acryloyl groups or a compound having two or more N-alkoxymethylamino groups is preferable.

Specific examples of the compound having two or more (meth) acryloyl groups include polyfunctional (meth) acrylates obtained by reacting an aliphatic polyhydroxy compound with (meth) acrylic acid, polyfunctional (meth) acrylates modified with caprolactone, Polyfunctional urethane (meth) acrylate obtained by reacting (meth) acrylate having a hydroxyl group with a polyfunctional isocyanate, (meth) acrylate having a hydroxyl group and an acid anhydride having a hydroxyl group And a polyfunctional (meth) acrylate having a carboxyl group obtained by the reaction.

Examples of the aliphatic polyhydroxy compound include divalent aliphatic polyhydroxy compounds such as ethylene glycol, propylene glycol, polyethylene glycol and polypropylene glycol; And tri- or higher aliphatic polyhydroxy compounds such as glycerin, trimethylol propane, pentaerythritol and dipentaerythritol. Examples of the (meth) acrylate having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, trimethylolpropane di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (Meth) acrylate, and glycerol dimethacrylate. Examples of the polyfunctional isocyanate include tolylene diisocyanate, hexamethylene diisocyanate, diphenylmethylene diisocyanate, and isophorone diisocyanate. Examples of the acid anhydride include anhydrides of dibasic acids such as succinic anhydride, maleic anhydride, anhydrous glutaric acid, itaconic anhydride, phthalic anhydride, and hexahydrophthalic anhydride, anhydrous pyromellitic acid, biphenyltetracarboxylic acid 2 An anhydride, and a tetrabasic acid dianhydride such as benzophenone tetracarboxylic acid dianhydride.

Examples of the caprolactone-modified polyfunctional (meth) acrylate include compounds described in paragraphs [0015] to [0018] of JP-A No. 11-44955. Examples of the alkylene oxide-modified polyfunctional (meth) acrylate include bisphenol A di (meth) acrylate modified with at least one selected from ethylene oxide and propylene oxide, at least one selected from ethylene oxide and propylene oxide Trimethylol propane tri (meth) acrylate modified with at least one member selected from isocyanuric acid tri (meth) acrylate, ethylene oxide and propylene oxide modified with at least one member selected from ethylene oxide and propylene oxide (Meth) acrylate modified with at least one member selected from pentaerythritol tetra (meth) acrylate, ethylene oxide and propylene oxide modified by species, at least one member selected from pentaerythritol tetra (meth) acrylate, ethylene oxide and propylene oxide Bell , And dipentaerythritol hexa (meth) acrylate modified with at least one member selected from ethylene oxide and propylene oxide, which are modified by dipentaerythritol penta (meth) acrylate modified by dipentaerythritol penta (meth) acrylate.

Examples of the compound having two or more N-alkoxymethylamino groups include compounds having a melamine structure, a benzoguanamine structure, and a urea structure. Also, the melamine structure and the benzoguanamine structure refer to chemical structures having one or more triazine rings or phenyl-substituted triazine rings as basic skeletons, and also include melamine, benzoguanamine, or condensates thereof. Specific examples of the compound having two or more N-alkoxymethylamino groups include N, N, N ', N', N '', N '' - hexa (alkoxymethyl) N, N ', N'-tetra (alkoxymethyl) glycoluril, and the like.

Of these polymerizable compounds, polyfunctional (meth) acrylates obtained by reacting tri- or higher-valent aliphatic polyhydroxy compounds with (meth) acrylic acid, caprolactone-modified polyfunctional (meth) acrylates, polyfunctional urethane (meth) N, N, N ', N'-tetra (alkoxymethyl) benzoguanamine is preferred. Among the multifunctional (meth) acrylates obtained by reacting a trivalent or higher aliphatic polyhydroxy compound with (meth) acrylic acid, trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, Erythritol pentaacrylate and dipentaerythritol hexaacrylate have high strength of the colored layer and excellent surface smoothness of the colored layer and cause background contamination and film residue on the substrate and on the light shielding layer of the unexposed portion It is particularly preferable from the viewpoint of difficulty.

In the present invention, (C) the polymerizable compounds may be used alone or in combination of two or more.

In the present invention, the content of the polymerizable compound (C) is usually 3 to 200 parts by mass, preferably 5 to 100 parts by mass, and more preferably 10 to 50 parts by mass, relative to 100 parts by mass of the total amount of the colorant (A) to be. The content of the polymerizable compound (C) is usually 20 to 300 parts by mass, preferably 50 to 250 parts by mass, and more preferably 100 to 200 parts by mass based on 100 parts by mass of the resin (B). By adopting such a shape, a bezel excellent in light shielding property, heat resistance, and chemical resistance can be formed.

- (D) Photopolymerization initiator -

The curable composition of the present invention may contain a photopolymerization initiator. This makes it possible to impart radiation sensitivity to the curable composition. The photopolymerization initiator used in the present invention is a compound that generates active species capable of initiating polymerization of the polymerizable compound (C) by exposure to radiation such as visible light, ultraviolet light, deep ultraviolet light, electron beam, and X-ray. The photopolymerization initiator may be used alone or in combination of two or more.

Examples of such photopolymerization initiators include thioxanthone compounds, acetophenone compounds, nonimidazole compounds, triazine compounds, O-acyloxime compounds, onium salt compounds, benzoin compounds, benzophenone compounds, Phosphine oxide compounds, titanocene compounds,? -Diketone compounds, polynuclear quinone compounds, diazo compounds, imidosulfonate compounds, and onium salt compounds. Among them, at least one member selected from an O-acyloxime compound, an acetophenone compound, an acylphosphine oxide compound and a titanocene compound is preferable.

Examples of the O-acyloxime compound among the preferred photopolymerization initiators in the present invention include 1,2-octanedione, 1- [4- (phenylthio) phenyl] -, 2- (O-benzoyloxime) (O-acetyloxime), ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) (2-methyl-4-tetrahydrofuranylmethoxybenzoyl) -9H-carbazol-3-yl] -, 1- (O- acetyloxime), ethanone, 1- [ Methyl-4- (2,2-dimethyl-1,3-dioxolanyl) methoxybenzoyl} -9H-carbazol- - [4- [3- [4 - [[2- (acetyloxy) ethyl] sulfonyl] -2-methylbenzoyl] -6- [ ] -9-yl] phenyl, 1- (O-acetyloxime) and the like. NCI-831 and NCI-930 (manufactured by ADEKA), DFI-020 and DFI-091 (manufactured by Daito Kikusui K.K.) as commercial products of O-acyloxime compounds, , Irgacure OXE-03, Irgacure OXE-04 (manufactured by BASF), and the like may be used.

Among these O-acyloxime compounds, ethanone, 1- [9-ethyl-6- (2-methylbenzoyl) -9H-carbazol- Methylbenzoyl] -6- [1 - [(acetyloxy) imino] ethyl] - [4- 9H-carbazol] -9-yl] phenyl, 1- (O-acetyloxime).

O-acyloxime compounds may be used alone or in combination of two or more.

Among the preferred photopolymerization initiators in the present invention, the acetophenone-based compound is more preferably an alpha -aminoalkylphenone-based compound, for example, 2-methyl-1- [4- (methylthio) 1- (4-morpholinophenyl) butan-1-one, 2- (4-methylbenzyl) -2- (4-morpholinophenyl) butan-1-one.

Among these acetophenone compounds, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane- Naphthyl) butan-1-one is preferred.

The acetophenone compounds may be used alone or in combination of two or more.

Examples of the preferable acylphosphine oxide compound in the present invention include isobutyrylmethylphosphinic acid methyl ester, isobutyrylphenylphosphinic acid methyl ester, pivaloylphenylphosphinic acid methyl ester, 2-ethyl Hexanoylphenylphosphinic acid methyl ester, pivaloylphenylphosphinic acid isopropyl ester, p-toluylphenylphosphinic acid methyl ester, o-toluylphenylphosphinic acid methyl ester, 2,4-dimethylbenzoylphenylphosphinic acid methyl ester , pt-butylbenzoyl phenylphosphinic acid isopropyl ester, acryloylphenylphosphinic acid methyl ester, isobutyryldiphenylphosphine oxide, 2-ethylhexanoyldiphenylphosphine oxide, o-toluyldiphenylphosphine oxide, p-butylbenzoyldiphenylphosphine oxide, 3-pyridylcarbonyldiphenylphosphine oxide, acryloyl-diphenylphosphine oxide, benzoyldiphenylphosphine oxide Pivaloyldiphenylphosphine oxide, p-toluyldiphenylphosphine oxide, 4- (t-butyl) benzoyldiphenylphosphine oxide, pivaloyldiphenylphosphine oxide, , 2-methyl-2-ethylhexanoyldiphenylphosphine oxide, 1-methyl-2-ethylhexanoyldiphenylphosphine oxide, terephthaloylbisdiphenylphosphine oxide, 2-methylbenzoyldiphenylphosphine oxide, Monoacylphosphine oxides such as cyclohexanoyldiphenylphosphine oxide, pivaloylphenylphosphinic acid methyl ester, pivaloylphenylphosphinic acid isopropyl ester, and 2,4,6-trimethylbenzoyldiphenylphosphine oxide;

Bis (2,6-dichlorobenzoyl) phenylphosphine oxide, bis (2,6-dichlorobenzoyl) -2,5-dimethylphenylphosphine oxide, bis (2,6- (2,6-dichlorobenzoyl) -4-propylphenylphosphine oxide, bis (2,6-dichlorobenzoyl) -2-naphthylphosphine oxide, bis (2,6- Bis (2,6-dichlorobenzoyl) -4-chlorophenylphosphine oxide, bis (2,6-dichlorobenzoyl) -2,4-dimethoxyphenylphosphine oxide, bis (2,6-dichlorobenzoyl) -4-octylphenylphosphine oxide, bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide, bis (2,4,6- Dimethylphenylphosphine oxide, bis (2,6-dichloro-3,4,5-trimethoxybenzoyl) -2,5-dimethylphenylphosphine oxide, bis - Dichloro-3,4,5-trimethoxybenzo ) -4-ethoxyphenylphosphine oxide, bis (2-methyl-1-naphthoyl) -2,5-dimethylphenylphosphine oxide, bis Bis (2-methyl-1-naphthoyl) -4-propylphenylphosphine oxide, bis (2- (1-naphthoyl) -2,5-dimethylphenylphosphine oxide, bis (2-methoxy-1-naphthoyl) -4-ethoxyphenylphosphine oxide, bis Bisacylphosphine oxides such as 2,5-dimethylphenylphosphine oxide and bis (2,6-dimethoxybenzoyl) -2,4,4-trimethylpentylphosphine oxide;

And the like. In addition, the acylphosphine compounds described in JP-A-3-101686, JP-A-5-345790, and JP-A-6-298818 may be used.

Of these acylphosphine oxide-based compounds, 2,4,6-trimethylbenzoyldiphenylphosphine oxide (for example, Darocur TPO manufactured by BASF) is preferably used as the monoacylphosphine oxide Bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide (for example, Irgacure 819 manufactured by BASF), bis (2,6-dimethoxybenzoyl) (2,4,6-trimethylbenzoyl) -2,4,4-trimethylpentylphenylphosphine oxide (for example, Irgacure 1700 manufactured by BASF) is preferable, and bis (2,4,6-trimethylbenzoyl) More preferred is phenylphosphine oxide.

The acylphosphine oxide compound may be used alone or in combination of two or more.

Examples of the titanocene-based photo compound among the preferred photopolymerization initiators in the present invention include bis (cyclopentadienyl) -Ti-di-chloride, bis (cyclopentadienyl) Dienyl) -Ti-bis-2,3,4,5,6-pentafluorophenyl, bis (cyclopentadienyl) -Ti-bis-2,3,5,6-tetrafluorophenyl, bis (Cyclopentadienyl) -Ti-bis-2,6-difluorophenyl, bis (cyclopentadienyl) - Ti-bis-2,4,6-trifluorophenyl, bis Bis-2,4-difluorophenyl, bis (methylcyclopentadienyl) -Ti-bis-2,3,4,5,6-pentafluorophenyl, bis (methylcyclopentadienyl) Ti-bis-2,3,5,6-tetrafluorophenyl, bis (methylcyclopentadienyl) -Ti-bis-2,6-difluorophenyl (for example, commercially available from BASF) Irgacure 727L), bis (cyclopentadienyl) -bis (2,6-difluoro-3- (pyr- l-yl) Irgacure 784 manufactured by BASF, bis (cyclopentadienyl) -bis (2,4,6-trifluoro-3- (pyryl- (2,4,6-trifluoro-3- (2-5-dimethylpyr-1-yl) phenyl) titanium in place of the bis (cyclopentadienyl) Japanese Unexamined Patent Application Publication Nos. Sho-152396, 61-151197, 63-10602, 63-41483, 63-41484, 2- 291, JP-A-3-12403, JP-A-3-20293, JP-A-3-27393, JP-A-3-52050, JP- 219756, JP-A-4-221958, and the like.

Among these titanocene compounds, bis (cyclopentadienyl) -bis (2,6-difluoro-3- (pyr-1-yl) phenyl) titanium is preferable.

The titanocene compounds may be used alone or in combination of two or more.

Examples of the photopolymerization initiator other than the above include those exemplified in paragraphs [0079] to [0095] of JP-A No. 2010-134419.

Among them, the photopolymerization initiator (D) preferably contains at least one selected from an acylphosphine oxide-based compound and a titanocene-based compound. Acylphosphine oxide-based compound and titanocene-based compound, the content thereof is preferably 90% by mass or more, particularly preferably 96% by mass or more, of the total photopolymerization initiator.

In the present invention, the content of the photopolymerization initiator (D) is generally 5 to 200 parts by mass, preferably 10 to 100 parts by mass, more preferably 15 to 50 parts by mass, per 100 parts by mass of the polymerizable compound. By adopting such a shape, a bezel excellent in light shielding property, heat resistance, chemical resistance, curability, and film property can be formed.

- (E) Antioxidants -

The curable composition of the present invention preferably contains an antioxidant from the viewpoint of forming a bezel with little yellowing. Examples of such an antioxidant include a phenol-based antioxidant, a phosphorus-based antioxidant, a sulfur-based antioxidant, and a benzophenone-based antioxidant. The antioxidant may be used alone or in combination of two or more.

Examples of the phenol antioxidant include 2,4,6-tris (3 ', 5'-di-t-butyl-4'-hydroxybenzyl) mesitylene, 2,4- ) -6- (4-hydroxy-3,5-di-t-butylanilino) -1,3,5-triazine, pentaerythritol tetrakis [3- (3,5- (For example, Irganox 1010 manufactured by BASF), 2,6-di-t-butyl-4-nonylphenol, thiodiethylenebis [ (For example, Irganox 1035 manufactured by BASF), 2,2'-methylenebis (triphenylphosphine) - (6- (1-methylcyclohexyl) -p-cresol), N, N-hexamethylenebis (3,5- t-butyl-o-cresol, 6-t-butylhydroquinone, 2,5-di-t-amyl-hydroquinone, 2,4-dimethyl-6- (1-methylcyclohexyl) Butyl-2,4-xylenol, 2,4-dimethyl-6- (1-methylpentadecyl) phenol, 2,4-bis (octylthiomethyl) (3-t-butyl-4-hydroxy-5-methylphenyl) propionate] (for example, bis (dodecylthiomethyl) (Irganox 245 manufactured by BASF), 3,9-bis [2- [3- (t-butyl-4-hydroxy-5-methylphenyl) propionyloxy] Ethyl] -2,4,8,10-tetraoxaspiro [5.5] undecane (for example, Smilizer GA-80 manufactured by Sumitomo Chemical Co., Ltd., triethylene glycol bis [3- (3- 4-hydroxy-5-methylphenyl) propionate (for example Adekastab AO-70 manufactured by ADEKA), 2-t-amylphenol, 2- Butylphenol, 1,1,3-tris- (2'-methyl-4'-hydroxy-5'-t-butylphenyl) -butane, 4,4'- (Manufactured by ADEKA), Adekastab AO-30, Adekastab AO-40 (manufactured by ADEKA)) as a commercial product in addition to bis- (2-t-butyl- BBM, Smiliger GM (from above, Sumitomo Kagaku ), And the Manufacture), topa play CA (ICI Corp.).

Examples of the phosphorus antioxidant include tris (isodecyl) phosphite, tris (tridecyl) phosphite, phenyl isooctyl phosphite, phenyl isodecyl phosphite, phenyl di (tridecyl) phosphite, diphenyl isooctyl phosphine (Nonylphenyl) phosphite, 4,4'-isopropylidenediphenol alkyl phosphite, trisnonylphenyl phosphite, tris (phenylphenyl) phosphite, diphenyl isodecyl phosphite, diphenyl tridecyl phosphite, triphenyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, tris (biphenyl) phosphite, distearylpentaerythritol diphosphite, di (2,4- Butylphenyl) pentaerythritol diphosphite, di (nonylphenyl) pentaerythritol diphosphite, phenylbisphenol A pentaerythritol diphosphite, tetra-tridecyl 4,4'-butylidene bis (3-methyl- Butylphenol) diphosphite, hexatridecyl 1, Di-t-butyl-4-hydroxybenzylphosphite diethyl ester, 1,3-tris (2-methyl-4-hydroxy- 3-bis (diphenoxyphosphonyloxy) -benzene, and ethyl bis (2,4-di-t-butyl-6-methylphenyl) phosphoric acid. Examples of commercially available products include ADEKA STAB 1500, ADEKA STAB 2112, ADEKA STAB C, ADEKA STAB 135A, ADEKA 1500 (manufactured by ADEKA) GP (manufactured by Sumitomo Chemical Co., Ltd.) and the like can be used.

Examples of the sulfur-based antioxidant include those described in paragraph [0084] of JP-A No. 2009-122650.

Examples of the benzophenone-based antioxidant include those described in paragraph [0123] of Japanese Patent Application Laid-Open No. 2014-026228.

Among them, from the viewpoint of forming a bezel excellent in brightness and light shielding property, it is preferable that at least one selected from the group consisting of a phenol-based antioxidant and a phosphorus-based antioxidant is contained as an antioxidant, Do.

The content of the antioxidant in the present invention is usually 0.01 to 10 parts by mass, preferably 0.1 to 8 parts by mass, more preferably 0.5 to 5 parts by mass, relative to 100 parts by mass of the total content of each component excluding the solvent of the curable composition to be. By adopting this form, a bezel with a low yellowing can be formed.

- (F) Solvent-

The curable composition of the present invention contains the above components (A) to (C), and optionally other components, and is usually prepared as a liquid composition by blending an organic solvent.

The solvent (F) can be appropriately selected and used as long as the components (A) to (C) constituting the curable composition or other components are dispersed or dissolved and reacted with these components and have suitable volatility .

As the organic solvent, for example,

Ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n-propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol mono- -Propyl ether, diethylene glycol mono-n-butyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol mono- Dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n-propyl ether, dipropylene glycol mono-n-butyl ether, tripropylene glycol monomethyl ether, tri (Poly) alkylene glycol monoalkyl ethers such as propylene glycol monoethyl ether;

Lactic acid alkyl esters such as methyl lactate and ethyl lactate;

(Cyclo) alkyl alcohols such as methanol, ethanol, propanol, butanol, isopropanol, isobutanol, t-butanol, octanol, 2-ethylhexanol and cyclohexanol;

Ketoalcohols such as diacetone alcohol;

Ethylene glycol monomethyl ether acetate, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, dipropylene glycol monomethyl ether (Poly) alkylene glycol monoalkyl ether acetates such as acetate, 3-methoxybutyl acetate and 3-methyl-3-methoxybutyl acetate;

Glycol ethers such as diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, and tetrahydrofuran;

Ketones such as methyl ethyl ketone, cyclohexanone, 2-heptanone and 3-heptanone;

Diacetates such as propylene glycol diacetate, 1,3-butylene glycol diacetate and 1,6-hexanediol diacetate;

Alkoxycarboxylates such as methyl 3-methoxypropionate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl ethoxyacetate and 3-methyl- Acid esters;

Amyl acetate, n-butyl acetate, ethyl butyrate, n-propyl butyrate, i-propyl butyrate, propyl acetate, isopropyl acetate, n- , Fatty acid alkyl esters such as n-butyl butyrate, methyl pyruvate, ethyl pyruvate, n-propyl pyruvate, methyl acetoacetate, ethyl acetoacetate, and ethyl 2-oxobutanoate;

Aromatic hydrocarbons such as toluene and xylene;

Amides such as N, N-dimethylformamide, N, N-dimethylacetamide and N-methylpyrrolidone,

And the like.

(Poly) alkylene glycol monoalkyl ether, a lactic acid alkyl ester, a (poly) alkylene glycol monoalkyl ether acetate, a glycol ether, a ketone, a di (meth) acrylate and the like are preferable from the viewpoints of solubility, dispersibility of a pigment, Propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monomethyl ether acetate, -Methoxybutyl acetate, diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, cyclohexanone, 2-heptanone, 3-heptanone, 1,3-butylene glycol diacetate, 1,6-hexanediol di Acetate, ethyl lactate, ethyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, 3- Amyl acetate, n-butyl acetate, ethyl butyrate, i-propyl butyrate, n-butyl butyrate, and pyruvic acid. Ethyl and the like are preferable.

In the present invention, the (F) solvent may be used alone or in combination of two or more.

The content of the solvent (F) is not particularly limited, but is preferably such that the total concentration of each component except for the solvent of the curable composition is 10 to 70 mass%, more preferably 30 to 60 mass%. By using this form, it is possible to obtain a curable composition having excellent coating properties and storage stability.

-additive-

The curable composition of the present invention may contain various additives as required.

Examples of the additive include fillers such as glass and alumina; High molecular compounds such as polyvinyl alcohol and poly (fluoroalkyl acrylate); Surfactants such as fluorine-based surfactants and silicone-based surfactants; Vinyltriethoxysilane, vinyltris (2-methoxyethoxy) silane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) Aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 2- (3,4-epoxycyclo Hexyl) ethyltrimethoxysilane, 3-chloropropylmethyldimethoxysilane, 3-chloropropyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane and the like Adhesion promoters; Ultraviolet absorbers such as 2- (3-t-butyl-5-methyl-2-hydroxyphenyl) -5-chlorobenzotriazole and alkoxybenzophenones; An anti-aggregation agent such as sodium polyacrylate; Amino-1-pentanol, 3-amino-1,2-propane, 3-amino-1-pentanol, Diol, 2-amino-1,3-propanediol, 4-amino-1,2-butanediol and the like; A developing agent such as mono [2- (meth) acryloyloxyethyl succinic acid], phthalic acid mono [2- (meth) acryloyloxyethyl], omega -carboxylic polycaprolactone mono (meth) .

The curable composition of the present invention can be prepared by a suitable method, and the preparation method thereof can be produced, for example, by mixing the components (A) to (C) together with (F) a solvent or other components to be optionally added have. Among them, a white pigment is mixed and dispersed in a solvent (F) in the presence of a dispersant, optionally with a part of a binder resin, for example, using a bead mill or a roll mill to prepare a colorant dispersion, (D) a photopolymerization initiator, (E) an antioxidant, (F) a solvent and other components are added to the dispersion of the colorant, (C) a polymerizable compound and, if necessary, a binder resin, (Hereinafter, also referred to as " production method I "). Production method I is useful when the coloring agent different from the white pigment is a compound soluble in the solvent (F) such as a dye.

The white pigment and the coloring agent different from the white pigment are mixed and dispersed in the solvent (F) in the presence of the dispersing agent, optionally with a part of the binder resin, for example, using a bead mill, roll mill or the like (D) a photopolymerization initiator, (E) an antioxidant, (F) a solvent or other components are added to the dispersion of the colorant, (Hereinafter, also referred to as " production method II ") may be employed. The dispersion of the colorant in Production Method II may be subjected to a step of uniformly dispersing the white pigment and the colorant different from the white pigment simultaneously in the solvent (F). The colorant dispersion liquid in Production Method II contains at least a colorant different from the white pigment (A), the white pigment, the resin (B) and the solvent (F), and the content of the resin (B) The coloring agent different from the white pigment and the white pigment is uniformly dispersed even when the amount is not more than 80 parts by mass, particularly not more than 60 parts by mass, more preferably not more than 45 parts by mass based on the total amount of the coloring agent dispersion. Production method II is useful when the coloring agent different from the white pigment is a poorly soluble or insoluble compound in the (F) solvent such as a pigment.

Manufacturing method II can also be performed with reference to, for example, methods described in Japanese Patent Laid-Open Nos. 2001-108817 and 2013-205832.

The present invention also provides a process for producing a colorant dispersion which uniformly disperses a white pigment and a colorant different from the white pigment in a solvent at the same time.

Curing membrane  And Bezel , And his manufacturing method

The cured film of the present invention comprises a white pigment and a coloring agent different from the white pigment, and the content ratio of the coloring agent different from the white pigment is 1 to 2000 ppm in the total solid content of the cured film. Specifically, it can be formed using the curable composition of the present invention. Further, the bezel of the present invention comprises the cured film of the present invention.

Hereinafter, a method of forming the cured film constituting the bezel will be described. First, a liquid composition of the curable composition of the present invention is applied onto the surface of a substrate, and then pre-baked to evaporate the solvent to form a coating film. Subsequently, this coating film is exposed through a photomask, and then developed with an alkali developer to dissolve and remove the unexposed portion of the coating film. Thereafter, the cured film is formed in a predetermined arrangement by post-baking.

Examples of the substrate used for forming the cured film include glass, silicon, polycarbonate, polyester, aromatic polyamide, polyamideimide, and polyimide.

These substrates may be subjected to appropriate pretreatment such as chemical treatment with a silane coupling agent, plasma treatment, ion plating, sputtering, gas phase reaction, vacuum deposition, etc., as desired.

When the curable composition is applied to a substrate, a suitable coating method such as a spraying method, a roll coating method, a rotary coating method (spin coating method), a slit die coating method (slit coating method), a bar coating method, A coating method, and a slit die coating method.

The prebake is usually carried out in combination with reduced-pressure drying and heating and drying. The reduced pressure drying is usually carried out until 50 to 200 Pa is reached. The conditions for heating and drying are usually about 70 to 110 DEG C for about 1 to 10 minutes.

The coating thickness is usually from 1 to 50 μm, preferably from 2 to 30 μm, more preferably from 5 to 20 μm, as a film thickness after drying.

Examples of the light source used for forming the cured film include a lamp light source such as a xenon lamp, a halogen lamp, a tungsten lamp, a high pressure mercury lamp, an ultrahigh pressure mercury lamp, a metal halide lamp, a medium pressure mercury lamp or a low pressure mercury lamp, , A XeCl excimer laser, a nitrogen laser, and the like. An ultraviolet LED may be used as an exposure light source. The wavelength is preferably in the range of 190 to 450 nm.

The exposure dose of the radiation is generally preferably from 10 to 10,000 J / m < 2 >.

Examples of the alkali developer include sodium carbonate, sodium hydrogencarbonate, sodium hydroxide, potassium hydroxide, tetramethylammonium hydroxide, choline, 1,8-diazabicyclo- [5.4.0] Diazabicyclo- [4.3.0] -5-nonene and the like are preferable.

To the alkali developing solution, a water-soluble organic solvent such as methanol or ethanol, a surfactant or the like may be added in an appropriate amount. After the alkali development, it is usually washed with water.

As the development processing method, a shower development method, a spray development method, a dip (immersion) development method, a puddle (liquid immersion) development method, or the like can be applied. The developing conditions are preferably 5 to 300 seconds at room temperature.

The post-bake condition is usually about 180 to 300 DEG C for about 10 to 90 minutes. The curable composition of the present invention can form a cured film having low yellowing even at a post-baking temperature of 200 to 300 占 폚, further 230 to 290 占 폚, further 250 to 280 占 폚.

The thickness of the cured film thus formed is usually 1 to 50 占 퐉, preferably 2 to 30 占 퐉, and more preferably 5 to 20 占 퐉.

A transparent conductive film can be formed by sputtering or a protective film can be formed on the cured film obtained as described above, if necessary. The curable composition of the present invention is particularly useful as a bluish white light shielding film because it has little yellowing even if subjected to a heat treatment at 250 캜 or higher at the time of forming a transparent electrode.

The bezel having the cured film of the present invention thus formed is extremely useful for a display device requiring a design because of a small amount of yellowing. Specifically, the bezel according to the present invention, by curing of the film is provided with the color represented by the CIE 1976 color coordinate system satisfy the 82≤L ^* ≤100, -3≤a ^* ≤2, also -8≤b ^* <0, the bezel The display device having the above-described structure can be excellent in an aesthetics. More in view to increase the aesthetic, the color of the cured film is, for example 82≤L ^* ≤100, -3≤a ^* ≤2, also -8≤b ^* is preferable, and further satisfying the 82≤L ≤-1 ^* ≤100, -2≤a ^* ≤2, it is preferable to satisfy the -7≤b ^* ≤-3. The chromaticity of the cured film in the present invention is the chromaticity measured for a cured film having a thickness of 10 mu m.

Display device

The display device of the present invention includes the bezel of the present invention. Examples of the display device include a portable digital display device such as a smart phone or a tablet terminal.

[Example]

Hereinafter, the present invention will be described more specifically by way of examples. However, the present invention is not limited to the following examples.

Synthesis of dispersant

Synthesis Example 1

In a flask equipped with a cooling tube and a stirrer, 100 parts by mass of propylene glycol monomethyl ether acetate (hereinafter may be abbreviated as &quot; PGMEA &quot;) was charged and replaced with nitrogen. The mixture was heated to 80 占 폚 and, at the same temperature, 100 parts by mass of PGMEA, 8 parts by mass of methacrylic acid, 36 parts by mass of methyl methacrylate, 36 parts by mass of butyl methacrylate, 10 parts by mass of lauryl methacrylate, 10 parts by mass and 2,2'-azobisisobutyronitrile) was added dropwise over 1 hour, and polymerization was carried out at this temperature for 2 hours. Thereafter, the temperature of the reaction solution was raised to 100 占 폚 and further polymerized for 1 hour. After cooling to room temperature, the solid content concentration was adjusted to 40 mass% using PGMEA. This is used as a dispersant (1) solution (solid content concentration: 40 mass%). The dispersant (1) obtained had Mw = 14,200 and Mn = 6,800.

Synthesis of binder resin

Synthesis Example 2

In a flask equipped with a cooling tube and a stirrer, 200 parts by mass of diethylene glycol monomethyl ether acetate was charged and replaced with nitrogen. And heated at 80 占 폚. To the same temperature, 200 parts by mass of PGMEA, 8 parts by mass of mono [2- (meth) acryloyloxyethyl succinate], 72 parts by mass of butyl methacrylate, 20 parts by mass of glycidyl methacrylate, 6 parts by mass of 2,2'-azobisisobutyronitrile and 6 parts by mass of? -Methylstyrene dimer was added dropwise over 1 hour, and polymerization was carried out at this temperature for 4 hours. Thereafter, the temperature of the reaction solution was raised to 100 占 폚 and further polymerized for 1 hour. After cooling to room temperature, the solid content concentration was adjusted to 40 mass% using PGMEA. This is used as a binder resin (B-1) solution (solid content concentration: 40% by mass). The binder resin (B-1) thus obtained had Mw = 12,600 and Mn = 5,900.

Synthesis Example 3

200 parts by mass of PGMEA was charged into a flask equipped with a cooling tube and a stirrer and purged with nitrogen. The mixture was heated to 80 占 폚 and, at the same temperature, 200 parts by mass of PGMEA, 10 parts by mass of methacrylic acid, 5 parts by mass of mono [2- (meth) acryloyloxyethyl succinate], 65 parts by mass of benzyl methacrylate, 20 parts by mass of methacrylate, 16 parts by mass of 2,2'-azobisisobutyronitrile and 16 parts by mass of? -Methylstyrene dimer was added dropwise over one hour, and the mixture was polymerized at this temperature for 4 hours . Thereafter, the temperature of the reaction solution was raised to 90 캜 and further polymerized for 1 hour. After cooling to room temperature, the solid content concentration was adjusted to 40 mass% using PGMEA. This is used as a binder resin (B-2) solution (solid content concentration: 40% by mass). The binder resin (B-2) thus obtained had Mw = 12,000 and Mn = 6,500.

Synthesis Example 4

200 parts by mass of PGMEA was charged into a flask equipped with a cooling tube and a stirrer and purged with nitrogen. And the mixture was heated to 80 DEG C. At the same temperature, 200 parts by mass of PGMEA, 10 parts by mass of methacrylic acid, 5 parts by mass of 2-methacryloyloxyethyl succinate, 65 parts by mass of benzylmethacrylate, Oxymethyl) -3-ethyloxetane, 16 parts by mass of 2,2'-azobisisobutyronitrile and 8 parts by mass of? -Methylstyrene dimer was added dropwise over 1 hour, And polymerized for 4 hours. Thereafter, the temperature of the reaction solution was raised to 90 캜 and further polymerized for 1 hour. After cooling to room temperature, the solid content concentration was adjusted to 40 mass% using PGMEA. This is used as a binder resin (B-3) solution (solid content concentration: 40 mass%). The binder resin (B-3) thus obtained had Mw = 7,300 and Mn = 3,800.

Particle size distribution diameter  evaluation

The pigment dispersion prepared below was diluted 10-fold with PGMEA and the average particle diameter of the white pigment was determined using a particle size analyzer (L-500, manufactured by HORIBA).

Preparation of colorant dispersion

Production Example 1

As the coloring agent, there were used C.I. , 60 parts by mass of Pigment White 6: 1 (titanium oxide), 8 parts by mass of a dispersant (1) solution (solid content concentration of 40% by mass) as a dispersant, and propylene glycol monomethyl ether ) Was used so as to have a solid content concentration of 65% by mass and mixed and dispersed for 12 hours by a bead mill to prepare a pigment dispersion (A-1). The average particle diameter was 320 nm.

Production Example 2

As the colorant, C.I. 60 parts by mass of Pigment White 6: 1 (titanium oxide), BYK-LPN21116 ((meth) acrylic dispersant manufactured by BYK Corporation, amine value 29 mgKOH / g, solid content concentration 40% , And PGMEA as a solvent were mixed so as to have a solid content concentration of 65% by mass and mixed and dispersed by a bead mill for 12 hours to prepare a pigment dispersion (A-2). The average particle diameter was 280 nm.

Production Example 3

As the colorant, C.I. 59.9 parts by mass of Pigment White 6: 1 (titanium oxide); 12.5 parts by mass of BYK-LPN21116 ((meth) acrylic dispersant manufactured by BYK, amine value: 29 mgKOH / g, solid content concentration: 40% by mass) as a dispersant, 0.1 part by mass of Pigment Blue 15: , PGMEA was used so as to have a solid content concentration of 65% by mass and mixed and dispersed for 12 hours by a bead mill to prepare a pigment dispersion (A-3). The average particle diameter was 280 nm.

Production Example 4

As the coloring agent, there were used C.I. 59.9 parts by mass of Pigment White 6: 1 (titanium oxide); Pigment Violet 23 as a dispersant, 8 parts by mass of a dispersant (1) solution (solid content concentration of 40% by mass) as a dispersant, and PGME as a solvent so as to have a solid content concentration of 65% by mass. - A pigment dispersion (A-4) was prepared by dispersing. The average particle diameter was 320 nm.

Preparation and evaluation of curable composition

Example 1

(A) 680 parts by mass of the pigment dispersion (A-1) as a colorant, , 0.5 part by mass of Solvent Blue 45 (anthraquinone dye) and 0.1 part by mass of a xanthene dye represented by the following formula (? - 1), 100 parts by mass of a binder resin (B-1) ) As a polymerizable compound, 100 parts by mass of KAYARAD DPHA (a mixture of dipentaerythritol hexaacrylate and dipentaerythritol pentaacrylate, manufactured by Nippon Kayaku Co., Ltd.), (D) 100 parts by mass of 20 parts by mass of Darocur TPO (2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide manufactured by BASF), 1 part by mass of (E) Smilylizer GP (Sumitomo Chemical Co., Ltd.) , And PGMEA as a solvent were used so that the solid content concentration was 50 mass%, to thereby prepare a curable composition (S-1).

The curable composition (S-1) was applied on a soda glass substrate using a spin coater, and then prebaked on a hot plate at 100 DEG C for 1 minute to form a coating film having a thickness of 12 mu m. Subsequently, using a high-pressure mercury lamp, the coating film was exposed to radiation including wavelengths of 365 nm, 405 nm, and 436 nm at an exposure amount of 200 J / m2 without interposing a photomask. Thereafter, a shower phenomenon was carried out by discharging a 0.04% aqueous solution of potassium hydroxide at 23 캜 at a developing pressure of 1 kgf / cm 2 (nozzle diameter of 1 mm), and post-baking was further performed at 230 캜 for one hour to form a film Thereby forming a cured film having a thickness of 10 mu m.

Color evaluation

Using a spectroscopic colorimeter (CM-700d, manufactured by Konica Minolta), the reflected light of the cured film formed above was measured and quantified by the CIE 1976 color system.

The chromaticity was evaluated as &quot; o &quot; when b ^* was less than -2, &quot; DELTA &quot; when it was less than 0 and less than 0, and &quot; x &quot;

The lightness was evaluated as &quot;?&Quot; when L ^* was 84 or more, &quot; DELTA &quot; The results are shown in Table 1.

Heat resistance evaluation

Using a spectroscopic colorimeter (CM-700d, manufactured by Konica Minolta), the reflected light of the cured film formed above was measured and quantified by the CIE 1976 color system.

Next, the cured film was baked at 270 DEG C for 1 hour. The reflected light of this cured film was measured and quantified by the CIE 1976 color system.

Obtain a 270 ℃ amount of change in the b ^* before and after 1 hours bake (Δb ^*), was evaluated in a or more Δb ^* is 1, "○", "△" a case of less than 1 for more than 2 to less than 2 by "×." . The smaller Δb ^* is, the better the heat resistance is. The results are shown in Table 1.

Chemical resistance evaluation

Using a spectroscopic colorimeter (CM-700d, manufactured by Konica Minolta), the reflected light of the cured film formed above was measured and quantified by the CIE 1976 color system.

Next, the cured film was immersed in TOK 106 (resist stripping solution containing monoethanolamine / dimethyl sulfoxide solution, manufactured by Tokyo Ohka Kogyo Co., Ltd.) for one minute, washed with ultrapure water, and baked at 100 ° C for 1 minute. The reflected light of this cured film was measured and quantified by the CIE 1976 color system.

Obtaining the amount of change (Δb ^*) before and after immersion in the b ^*, and evaluated for one or more Δb ^* is "○", "△" for less than 1 second or more to less than 2 by "×". The smaller Δb ^* , the better the chemical resistance. The results are shown in Table 1.

Examples 2 to 25 and Comparative Examples 1 to 6

Curable compositions (S-2) to (S-31) were prepared in the same manner as in Example 1 except that the kind and amount of each component in Example 1 were changed as shown in Table 1. However, in any of the curing compositions, PGMEA was used as a solvent so as to have a solid content concentration of 50 mass%.

Subsequently, evaluation was carried out in the same manner as in Example 1 except that the curable compositions (S-2) to (S-31) were used in place of the curable composition (S-1). The results are shown in Table 1. Also, in each of Examples 1 to 25 and Comparative Examples 1 to 6, when b ^* before baking and after baking at 270 占 폚 for one hour in the heat resistance test were taken as (b ^* ) ₁ and (b ^* ) ₂ , (b ^* ) ₂ - (b ^* ) ₁ ? 0. Also addition of Examples 1 to 25 and being compared to any of Examples 1 to 6, when the b ^* is immersed before and after immersion in the test chemical resistance, respectively (b ^*) ₃ and (b ^*) _4, (b ^*) ₄ - (b ^* ) ₃ ? 0.

In Table 1, the components are as follows.

(coloring agent)

SB45: C.I. Solvent Blue 45 (anthraquinone dye)

SB70: C.I. Solvent Blue 70 (phthalocyanine dye)

BB7: C.I. Basic Blue 7 (triarylmethane dye)

SB38: C.I. Solvent Blue 38 (phthalocyanine dye)

? -1: a xanthene dye represented by the following formula (? -1)

alpha-2: xanthene dye represented by the following formula (? - 2)

? -3: a dipyrromethene dye represented by the following formula (? -3)

BV4: C.I. Basic violet 4 (triarylmethane dye)

? -4: Lumogen Red 305 (fluorescent dye manufactured by BASF, Perylene dye)

(Polymerizable compound)

C-1: KAYARAD DPHA (mixture of dipentaerythritol hexaacrylate and dipentaerythritol pentaacrylate, manufactured by Nippon Kayaku Co., Ltd.)

(Photopolymerization initiator)

D-1: Darocur TPO (2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide from BASF)

D-2: OXE-01 (manufactured by BASF)

D-3: 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropane-1-one manufactured by Irgacure 907 (BASF)

(Antioxidant)

E-1: Smilizer GP (a phenol-based antioxidant manufactured by Sumitomo Chemical Co., Ltd.)

Butyl dibenzo [d, f] [1, 3-dihydroxy-5-methylphenyl] propoxy] -2,4,8,10-tetra- 2] dioxaphospepin)

Claims (12)

(A) a colorant comprising a white pigment and a colorant different from a white pigment, (B) a resin, and (C) a polymerizable compound,
Wherein the content ratio of the colorant different from the white pigment is 1 to 2000 ppm based on the total solid content in the curable composition. The method according to claim 1, wherein the coloring agent different from the white pigment is selected from the group consisting of a perylene dye, an anthraquinone dye, a triarylmethane dye, a phthalocyanine dye, a xanthene dye, a dipyromethane dye, a phthalocyanine pigment, a dioxazine pigment, a quinacridone pigment , An azo pigment, an anthraquinone pigment, and a perylene pigment. The curable composition according to any one of claims 1 to 3, wherein the coloring agent different from the white pigment is any one of the following i) to iv).
(I) at least one selected from the group consisting of perylene dye, anthraquinone dye, xanthene dye and dipyramethylene dye,
Ii) a combination of a phthalocyanine dye and at least one member selected from the group consisting of a perylene dye, a xanthene dye, and a dipyramethylene dye,
Iii) a combination of a triarylmethane dye and at least one selected from xanthene dyes and dipyramethine dyes,
Iv) a combination of a phthalocyanine pigment and a xanthene dye. The curable composition according to any one of claims 1 to 3, wherein the curable composition (B) comprises a resin having at least one functional group selected from an acidic functional group and a cyclic ether group,
(D) a photopolymerization initiator, wherein the photopolymerization initiator comprises at least one compound selected from an O-acyloxime compound, an acetophenone compound, an acylphosphine oxide compound and a titanocene compound,
(E) an antioxidant, wherein the antioxidant comprises at least one selected from phenolic antioxidants and phosphorus antioxidants. A white pigment, and a colorant different from the white pigment,
Wherein the content ratio of the coloring agent different from the white pigment is 1 to 2000 ppm based on the total solid content of the cured film. The method of claim 5, wherein the color represented by the CIE 1976 color coordinate system ^{82≤L * ≤100, -3≤a * ≤2,} , the cured film also satisfies the -8≤b ^* <0. A bezel comprising the cured film according to claim 5 or 6. A display device comprising the bezel according to claim 7. (A) a white pigment, and (B) a colorant different from a white pigment, (B) a resin, and (F) a solvent. The colorant dispersion liquid according to claim 9, which is obtained through a process of simultaneously uniformly dispersing a white pigment and a colorant different from the white pigment in a solvent. The colorant dispersion liquid according to claim 9 or 10, wherein the content of the resin (B) is 80 parts by mass or less based on 100 parts by mass of the colorant. A white pigment, and a coloring agent different from the white pigment are uniformly dispersed in a solvent at the same time.