WO2019026547A1 - 感光性樹脂組成物及びその製造方法 - Google Patents
感光性樹脂組成物及びその製造方法 Download PDFInfo
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- WO2019026547A1 WO2019026547A1 PCT/JP2018/025726 JP2018025726W WO2019026547A1 WO 2019026547 A1 WO2019026547 A1 WO 2019026547A1 JP 2018025726 W JP2018025726 W JP 2018025726W WO 2019026547 A1 WO2019026547 A1 WO 2019026547A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
- C08F220/36—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate containing oxygen in addition to the carboxy oxygen, e.g. 2-N-morpholinoethyl (meth)acrylate or 2-isocyanatoethyl (meth)acrylate
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/0005—Production of optical devices or components in so far as characterised by the lithographic processes or materials used therefor
- G03F7/0007—Filters, e.g. additive colour filters; Components for display devices
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/028—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with photosensitivity-increasing substances, e.g. photoinitiators
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/027—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds
- G03F7/032—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders
- G03F7/033—Non-macromolecular photopolymerisable compounds having carbon-to-carbon double bonds, e.g. ethylenic compounds with binders the binders being polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/004—Photosensitive materials
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/105—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having substances, e.g. indicators, for forming visible images
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/20—Exposure; Apparatus therefor
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/40—Treatment after imagewise removal, e.g. baking
Definitions
- the present invention relates to a photosensitive resin composition and a method for producing the same, a color filter and a method for producing the same, and an image display device.
- photosensitive resin compositions that can be cured by active energy rays such as ultraviolet rays and electron beams are widely used in the fields of various coatings, printing, paints, adhesives and the like. Also in the field of electronic materials such as printed wiring boards, photosensitive resin compositions that can be cured by active energy rays are used as solder resists, resists for color filters, and the like. Furthermore, although the required characteristics for the curable photosensitive resin composition are becoming increasingly diverse and sophisticated, among them, short-time curing considering productivity, low-temperature curing which suppresses thermal damage of applied members Is required.
- the color filter generally includes a transparent substrate such as a glass substrate, red (R), green (G) and blue (B) pixels formed on the transparent substrate, and a black matrix formed at the boundary of the pixels. It comprises a pixel and a protective film formed on the black matrix.
- a color filter having such a configuration is usually manufactured by sequentially forming a black matrix, pixels and a protective film on a transparent substrate.
- Various methods have been proposed as methods for forming the pixel and the black matrix (hereinafter, the pixel and the black matrix are referred to as “colored pattern”).
- the pigment / dye dispersion method manufactured by the photolithography method using the photosensitive resin composition as a resist and repeating coating, exposure, development and baking is excellent in durability and colored with few defects such as pinholes. It is currently mainstream because it gives patterns.
- the photosensitive resin composition used in the photolithography method contains an alkali-soluble resin, a reactive diluent, a photopolymerization initiator, a colorant and a solvent.
- the pigment / dye dispersion method while having the above advantages, since a pattern of black matrix, R, G, B is repeatedly formed, high heat resistance is required, and as a coloring agent which can withstand high baking temperature It is often a problem that there are limitations such as the limited types of colorants that can be used.
- Patent Document 1 enables low-temperature curing by using a compound such as an alkali-soluble resin, a polymerizable compound having an ethylenically unsaturated bond, a radiation-sensitive polymerization initiator, a colorant, and ethyl 3-aminobenzenesulfonate. Disclosed is a coloring composition having improved storage stability.
- Patent Document 2 discloses a polymer precursor whose reaction to a final product is promoted by a basic substance or by heating in the presence of a basic substance, and a specific base generating a base by irradiation of electromagnetic waves and heating. Low temperature curing is enabled by using a photosensitive resin composition containing an agent.
- the present invention has been made to solve the above-mentioned problems, and is a photosensitive resin which is excellent in developability and storage stability and gives a cured coating film excellent in solvent resistance even when cured at low temperature. It aims at providing a composition and its manufacturing method. Another object of the present invention is to provide a color filter having a coloring pattern excellent in solvent resistance, a method for producing the same, and an image display device having the color filter.
- the constituent unit (a) having a block isocyanato group is a constituent unit derived from a block isocyanato group-containing (meth) acrylate, and dissociation of the block isocyanato group of the block isocyanato group-containing (meth) acrylate
- the photosensitive resin composition according to [1] which has a rate of 5 to 99% by mass when heated at 100 ° C. for 30 minutes.
- the blocking agent of the structural unit (a) having a block isocyanato group is one or more selected from the group consisting of diethyl malonate, 3,5-dimethylpyrazole and methyl ethyl ketoxime [1] or [1]
- the hydroxyl group-containing organic solvent (B) is ethylene glycol monoalkyl ether, diethylene glycol monoalkyl ether, propylene glycol monoalkyl ether, propylene glycol monoaryl ether, dipropylene glycol monoalkyl ether, tripropylene glycol monoalkyl ether, 3-Methoxy-1-butanol, 1,3-propanediol monoalkyl ether, 1,3-butanediol monoalkyl ether, 1,4-butanediol monoalkyl ether, glycerin monoalkyl ether, glycerin dialkyl ether, methanol, ethanol , propanol, or C 5-6 cycloalkane diols, C 5-6 cycloalkane methanol, the group consisting of ethyl lactate and diacetone alcohol
- the photosensitive resin composition according to any one of at least one selected [1] to [3].
- the copolymer (A) contains 1 to 40 mol% of the structural unit (a) having the block isocyanato group and 1 to 60 mol% of the structural unit (b) having the acid group [ The photosensitive resin composition according to any one of [1] to [5].
- the molar ratio of the structural unit (a) having the block isocyanato group to the structural unit (b) having the acid group in the copolymer (A) is 10:90 to 50:50 [7]
- the copolymer (A) is 2- (3,5-dimethylpyrazol-1-yl) carbonylaminoethyl methacrylate, 2- [O- (1'-methylpropylideneamino) carboxyamino methacrylate Ethyl, malonic acid 2-[[[[2-methyl-1-oxo-2-propenyl] oxy] ethyl] amino] carbonyl] -1,3 diethyl ester, benzoic acid 4-[[[[[2- [ (2-Methyl-1-oxo-2-propen-1-yl) oxy] ethyl] amine] carbonyl] oxy] methyl ester, benzoic acid 2-[[[[[[[2-[(2-methyl-1-oxy) -2-propen-1-yl) oxy] ethyl] amine] carbonyl] oxy] methyl ester, and 2-propenoic acid 2-methyl-2-[[((3,5-dimethylphenoxy) carbon
- the photosensitive resin composition according to [9] which contains 5 to 80 parts by mass of E).
- a color filter having a colored pattern comprising a cured product of the photosensitive resin composition according to any one of [9] to [11].
- a method of producing a color filter comprising:
- a copolymer (A) is synthesized by the copolymerization reaction of a block isocyanato group-containing (meth) acrylate and an unsaturated carboxylic acid in the presence of a hydroxyl group-containing organic solvent (B), and then reactive dilution
- a process for producing a photosensitive resin composition comprising the step of blending an agent (C) and a photopolymerization initiator (D).
- a photosensitive resin composition which is excellent in developability and storage stability and forms a cured coating film excellent in solvent resistance even when cured at low temperature, and a method for producing the same. it can. Further, according to the present invention, it is possible to provide a color filter having a coloring pattern excellent in solvent resistance, a method for producing the same, and an image display device having the color filter.
- the photosensitive resin composition of the present invention comprises a copolymer (A) containing a structural unit (a) having a block isocyanato group and a structural unit (b) having an acid group, and a hydroxyl group-containing organic solvent (B) And a reactive diluent (C) and a photopolymerization initiator (D).
- the structural unit (a) which has a block isocyanato group which a copolymer (A) contains is a structural unit derived from a block isocyanato group containing monomer.
- a monomer having an ethylenically unsaturated bond and a blocked isocyanato group, etc. for example, the isocyanato group in an isocyanate compound having a vinyl group, a (meth) acryloyloxy group or the like in the molecule is blocked with a blocking agent Compounds are included.
- the reaction of the isocyanate compound with the blocking agent can be carried out with or without the presence of a solvent.
- a solvent it is necessary to use a solvent inert to the isocyanato group.
- an organic metal salt such as tin, zinc or lead, a tertiary amine or the like may be used as a catalyst.
- the reaction can generally be carried out at -20 to 150 ° C, but is preferably carried out at 0 to 100 ° C.
- the compound represented by following formula (1) can be mentioned as an example of the said isocyanate compound.
- R 1 represents a hydrogen atom or a methyl group
- R 2 is, -CO -, - COOR 3 - (wherein, R 3 is an alkylene group having 1 to 6 carbon atoms) Or -COO-R 4 O-CONH-R 5- (wherein, R 4 is an alkylene group having 2 to 6 carbon atoms, and R 5 is preferably having 2 to 12 carbon atoms which may have a substituent. And an alkylene group having 6 to 12 carbon atoms).
- R 2 is preferably —COOR 3 —, wherein R 3 is preferably an alkylene group having 1 to 4 carbon atoms.
- isocyanate compound represented by the said Formula (1) 2-isocyanatoethyl (meth) acrylate, 2-isocyanatopropyl (meth) acrylate, 3-isocyanatopropyl (meth) acrylate, 2 And -isocyanato-1-methylethyl (meth) acrylate, 2-isocyanato-1,1-dimethylethyl (meth) acrylate, 4-isocyanatocyclohexyl (meth) acrylate, methacryloyl isocyanate and the like.
- an equimolar (1 mol: 1 mol) reaction product of 2-hydroxyalkyl (meth) acrylate and a diisocyanate compound can be used.
- the alkyl group of the 2-hydroxyalkyl (meth) acrylate is preferably an ethyl group or an n-propyl group, more preferably an ethyl group.
- the diisocyanate compound include hexamethylene diisocyanate, 2,4- (or 2,6-) tolylene diisocyanate (TDI), 4,4'-diphenylmethane diisocyanate (MDI), 3,5,5-trimethyl-3.
- IPDI And-isocyanato methyl cyclohexyl isocyanate
- m- (or p-) xylene diisocyanate 1,3- (or 1,4-) bis (isocyanato methyl) cyclohexane, lysine diisocyanate and the like.
- (meth) acrylate in the present specification means that any of acrylate and methacrylate may be used, and the expression of (meth) acrylic acid may be any of acrylic acid and methacrylic acid. Means.
- Examples of the blocking agent for blocking the isocyanato group in the isocyanate compound include lactams such as ⁇ -caprolactam, ⁇ -valerolactam, ⁇ -butyrolactam, ⁇ -propiolactam, etc .; methanol, ethanol, propanol, butanol, ethylene glycol Alcohol, such as methyl cellosolve, butyl cellosolve, methyl carbitol, benzyl alcohol, phenyl cellosolve, furfuryl alcohol, cyclohexanol; phenol, cresol, 2,6-xylenol, 3,5-xylenol, ethylphenol, o-isopropylphenol , Butylphenol such as p-tert-butylphenol, p-tert-octylphenol, nonylphenol, dinonylphenol, styrenated phenol Phenolics such as methyl 2-hydroxybenzoate, methyl 4-
- the blocking agent protects the highly reactive isocyanato group, but heating causes the block isocyanato group to dissociate to regenerate the isocyanato group.
- the isocyanato group is reacted with a reactive functional group contained in the copolymer (A) or the reactive diluent (C), that is, an acid group, an optionally contained hydroxy group, an amino group, etc. Form a cured product with high crosslink density.
- a block isocyanato group containing (meth) acrylate as a monomer which gives the structural unit (a) which has a block isocyanato group from the viewpoint of low temperature curability and storage stability of the below-mentioned photosensitive resin composition .
- the block isocyanato group having a dissociation rate of preferably 5 to 99% by mass, more preferably 8 to 97% by mass, most preferably 10 to 95% by mass, when heat treated at 100 ° C. for 30 minutes. It is preferable to use a contained (meth) acrylate.
- the dissociation rate of the blocked isocyanato group of the blocked isocyanato group-containing (meth) acrylate was determined by preparing an n-octanol solution having a concentration of 20% by mass of the blocked isocyanato group-containing (meth) acrylate. Analysis of mass loss of the blocked isocyanato group-containing (meth) acrylate after heating at 100 ° C.
- blocking agents for block isocyanato group-containing (meth) acrylates having such a dissociation rate ⁇ -butyrolactam, 1-methoxy-2-propanol, 2,6-dimethylphenol, diisopropylamine, methyl ethyl ketoxime, 3,5 -Dimethylpyrazole and diethyl malonate.
- diethyl malonate, 3,5-dimethylpyrazole and methylethyl ketoxime are more preferable from the viewpoint of low-temperature curing.
- the block isocyanato group containing (meth) acrylate whose dissociation temperature of the block isocyanato group of block isocyanato group containing (meth) acrylate is 80 degreeC or more.
- a block isocyanato group-containing (meth) acrylate having a dissociation temperature of 80 ° C. or higher the stability of the copolymer during synthesis can be sufficiently ensured, and unintended crosslinking in the modification reaction described later The reaction can be reduced.
- the dissociation temperature of the block isocyanato group is 160 ° C. or less, the baking temperature can be sufficiently lowered, and the solvent resistance of the cured coating film can be sufficiently ensured.
- the dissociation temperature of the block isocyanato group of block isocyanato group containing (meth) acrylate prepares n-octanol solution whose density
- Block isocyanato group-containing (meth) acrylate As an example of the block isocyanato group-containing (meth) acrylate, Karenz (registered trademark) MOI-DEM (a reaction product of methacroyloxyethyl isocyanate and diethyl malonate represented by the following formula (2), Showa Denko KK Made by the company, dissociation temperature of block isocyanato group: 90 ° C., dissociation rate: 90% by mass, karen MOI-BP (methacroyloxyethyl isocyanate and 3,5-dimethylpyrazole) represented by the following formula (3)
- Product Showa Denko KK dissociation temperature of block isocyanato group: 110 ° C., dissociation rate: 70% by mass
- karen MOI-BM metalachloroyloxyethyl isocyanate and methyl ethyl ketoxime represented by the following formula (4)
- the proportion of the structural unit (a) having a block isocyanato group contained in the copolymer (A) is not particularly limited, but is preferably 1 to 40 mol%, more preferably 2 to 30 mol%, and most preferably It is 3 to 25 mol%.
- the proportion of the structural unit (a) having a block isocyanato group is 1 to 40 mol%, the solvent resistance of the cured coating is improved, and the storage stability of the copolymer (A) is also maintained.
- the constituent unit (b) having an acid group contained in the copolymer (A) is a constituent unit derived from an acid group-containing monomer (however, the unit corresponding to the constituent unit (a) having a block isocyanato group) except).
- the acid group include a carboxyl group, a sulfo group, a phospho group and the like, and among these, a carboxyl group is preferable in terms of availability.
- a monomer having a polymerizable unsaturated bond and an acid group for example, unsaturated carboxylic acid or its anhydride, unsaturated sulfonic acid, unsaturated phosphonic acid etc. It can be mentioned.
- preferable monomers include (meth) acrylic acid, ⁇ -bromo (meth) acrylic acid, ⁇ -furyl (meth) acrylic acid, crotonic acid, propiolic acid, cinnamic acid, ⁇ -cyanocinnamic acid and maleic acid
- Maleic anhydride monomethyl maleate, monoethyl maleate, monoisopropyl maleate, fumaric acid, itaconic acid, itaconic acid, itaconic acid, citraconic acid, unsaturated carboxylic acids such as citraconic acid or anhydrides thereof; 2-acrylamido-2 -Unsaturated sulfonic acids such as methyl propane sulfonic acid, tert-butyl acrylamido sulfonic acid, p-styrene sulfonic acid; unsaturated phosphonic acids such as vinyl phosphonic acid; and the like. These monomers may be used alone or in combination of two or more. Among these, unsaturated
- the alkali developability at the time of using the copolymer (A) as a photosensitive material is greatly improved.
- the proportion of the structural unit (b) having an acid group contained in the copolymer (A) is not particularly limited, but is preferably 1 to 60 mol%, more preferably 10 to 50 mol%, and most preferably 15 to It is 40 mol%.
- the proportion of the structural unit (b) having an acid group is 1 to 60 mol%, an appropriate rate of alkali development can be obtained, and a fine pattern can be formed.
- the molar ratio of the structural unit (a) having a block isocyanato group to the structural unit (b) having an acid group can be, for example, 1:99 to 99: 1, From the viewpoint of the solvent resistance of the cured coating film and the storage stability of the copolymer (A), the ratio is more preferably 5:95 to 75:25, and most preferably 10:90 to 50:50.
- ⁇ Other constituent unit (c)> As a constituent unit contained in the copolymer (A), together with a constituent unit (a) having a block isocyanato group and a constituent unit (b) having an acid group, other constituents copolymerizable therewith.
- a unit (c) may be contained (with the exception of those corresponding to the structural unit (a) having the above-mentioned block isocyanato group and the structural unit (b) having the above-mentioned acid group).
- the other structural unit (c) structural units other than the structural unit (c-1) having an epoxy group and the structural units (c-2), (c-1) and (c-2) having a hydroxyl group A unit (c-3) etc. is mentioned.
- the proportion of the other structural unit (c) contained in the copolymer (A) is not particularly limited, but is preferably 0 to 80 mol%, more preferably 0 to 70 mol%, and most preferably 0 to 60 mol. %.
- a monomer having a polymerizable unsaturated bond and an epoxy group for example, oxiranyl (meth) acrylate, glycidyl (meth) acrylate, 2- Methyl glycidyl (meth) acrylate, 2-ethyl glycidyl (meth) acrylate, 2-oxiranylethyl (meth) acrylate, 2-glycidyl oxyethyl (meth) acrylate, 3-glycidyl oxypropyl (meth) acrylate, glycidyl oxyphenyl (Meth) acrylic acid ester derivatives containing an epoxy group such as (meth) acrylate; 3,4-epoxycyclohexyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, 2- (3,4-epoxycyclohexene)
- the solvent resistance when using the copolymer (A) as a photosensitive material is largely improved.
- the proportion of the structural unit (c-1) having an epoxy group is not particularly limited, but is preferably more than 0 mol% It is at least 60 mol%, more preferably more than 0 mol% to 50 mol%, and most preferably more than 0 mol% to 40 mol%.
- a monomer used to introduce the structural unit (c-2) having a hydroxyl group a monomer having a polymerizable unsaturated bond and a hydroxyl group, for example, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) Acrylate, 2-hydroxybutyl (meth) acrylate, 2,3-dihydroxypropyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl acrylate, 4-hydroxybutyl acrylate, 2-acryloyloxyethyl-succinic acid, 2-acryloyl Oxyethyl hexahydrophthalic acid, 2-acryloyloxyethyl phthalic acid, 2-acryloyloxyethyl-2-hydroxyethyl-phthalic acid and the like can be mentioned.
- These monomers may be used alone or in combination of two or more.
- 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 2,3-dihydroxypropyl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (Meth) acrylic acid ester derivatives containing a hydroxyl group such as acrylate and 4-hydroxybutyl acrylate are preferable, and 2-hydroxyethyl (meth) acrylate is more preferable.
- the solvent resistance when using the copolymer (A) as a photosensitive material is largely improved.
- the proportion of the structural unit (c-2) having a hydroxyl group is not particularly limited, but preferably more than 0 mol% to 50 More preferably, it is more than 0 mol% to 40 mol%, and most preferably more than 0 mol% to 30 mol%.
- Specific examples of the monomer used for introducing the structural unit (c-3) other than the structural unit (c-1) having an epoxy group and the structural unit (c-2) having a hydroxyl group are styrene, ⁇ - Methylstyrene, o-vinyltoluene, m-vinyltoluene, p-vinyltoluene, o-chlorostyrene, m-chlorostyrene, p-chlorostyrene, o-methoxystyrene, m-methoxystyrene, p-methoxystyrene, p- Aromatic vinyl compounds such as nitrostyrene, p-cyanostyrene, and p-acetylaminostyrene; norbornene (bicyclo [2.2.1] hept-2-ene), 5-methylbicyclo [2.2.1] hept- 2-ene, 5-ethylbicyclo [
- pentadeca-3-ring having a norbornene structure such as ene-olefin; butadiene, isoprene, dienes such as chloroprene; methyl (meth) acrylate, ethyl (meth) acrylate, n- propyl (meth) acrylate, iso - Propyl (meth) acrylate, n-butyl (meth) acrylate, sec-butyl (meth) acrylate, iso-butyl (meth) acrylate, tert-butyl (meth) acrylate, pentyl (meth) acrylate, neopentyl (meth) Acrylate, benzyl (meth) acrylate, isoamyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, do
- (Meth) acrylic acid amide (meth) acrylic acid anilide, (meth) acrylonitrile, acrolein, vinyl chloride, vinylidene chloride, vinyl fluoride, vinylidene fluoride, N-vinyl pyrrolidone, vinyl pyridine, vinyl acetate, vinyl toluene, etc.
- unsaturated dicarboxylic acid diesters N-phenylmaleimide, N-cyclohexylmaleimide, N-laurylmaleimide, N- (4-hydroxyphenyl) Things such as maleimide Reimido; and the like.
- (meth) acrylic acid esters are preferable, and methyl (meth) acrylate and dicyclopentanyl (meth) acrylate are particularly preferable.
- These monomers may be used alone or in combination of two or more.
- the proportions of the block isocyanato group-containing monomer (a0) and the acid group-containing monomer (b0) used in the production of the copolymer (A) are not particularly limited, but preferably 1 to 40 mol% of (a0) And (b0) 1 to 60 mol%, more preferably (a0) 2 to 30 mol% and (b0) 10 to 50 mol%, most preferably (a0) 3 to 25 mol% and (b0) 15 to It is 40 mol%.
- the copolymer (A) further contains another structural unit (c), a block isocyanato group-containing monomer (a0), an acid group-containing monomer (b0) and an acid group-containing monomer (b0) used in the production of the copolymer (A)
- the proportion of the other monomer (c0) is preferably (a0) 1 to 40 mol%, (b0) 1 to 60 mol% and (c0) more than 0 mol% to 80 mol%, more preferably (a0) (2) 30 mol%, (b0) 10 to 50 mol% and (c0) more than 0 mol% to 70 mol%, most preferably (a0) 3 to 25 mol%, (b0) 15 to 40 mol% c0) More than 0 mol% to 60 mol%.
- the copolymerization reaction of the block isocyanato group-containing monomer (a0), the acid group-containing monomer (b0) and the other monomer (c0) is carried out in the presence or absence of a polymerization solvent according to a radical polymerization method known in the art. Although it can be carried out, it is preferably carried out in the presence of a hydroxyl group-containing organic solvent (B) described later, from the viewpoint of preventing abnormal polymerization and stably carrying out the polymerization reaction.
- the isocyanato group reacts with the hydroxyl group of the hydroxyl group-containing organic solvent (B) even if the block isocyanate group is dissociated to form an isocyanate group. Abnormal polymerization is prevented.
- the copolymer (A) thus obtained it is considered that a part of the blocking agent blocking the isocyanato group is substituted by the hydroxyl group-containing organic solvent (B).
- a polymerization initiator may be added to the solution, and the polymerization reaction may be performed at 50 to 100 ° C. for 1 to 20 hours.
- the block isocyanato group is dissociated to react with the acid group to form a gel. It is preferable to carry out the polymerization at a temperature below the dissociation temperature of the blocked isocyanato group, preferably at a temperature about 20 to 50 ° C. below the dissociation temperature of the blocked isocyanate group.
- the polymerization initiator that can be used for this copolymerization reaction is not particularly limited, and examples thereof include azobisisobutyronitrile, azobisisovaleronitrile, benzoyl peroxide, and t-butylperoxy-2- Ethyl hexanoate etc. are mentioned. These polymerization initiators may be used alone or in combination of two or more.
- the amount of the polymerization initiator used is generally 0.5 to 20 parts by mass, preferably 1.0 to 10 parts by mass, based on 100 parts by mass of the total amount of monomers.
- the weight average molecular weight in terms of polystyrene of the copolymer (A) is not particularly limited, but preferably 1,000 to 50,000, more preferably 3,000 to 40,000 according to the above-mentioned production method.
- the copolymer (A) can be obtained.
- the weight average molecular weight of the copolymer (A) is 1,000 or more, chipping of a colored pattern is less likely to occur after alkali development when used as a photosensitive resin composition.
- the weight average molecular weight of the copolymer (A) is 50,000 or less, the development time becomes appropriate, and practicability is secured.
- the acid value (JIS K6901 5.3) of a copolymer (A) can be selected suitably, When it mix
- the alkali developability at the time of using as a photosensitive resin composition becomes favorable for the acid value of a copolymer (A) to be 20 KOHmg / g or more.
- the acid value of the copolymer (A) is 300 KOHmg / g or less, the exposed portion (photocured portion) is difficult to dissolve in the alkali developer, so the pattern shape becomes good.
- the copolymer (A) contains a blocked isocyanato group in the molecule.
- the content of the blocked isocyanato group may be appropriately selected, but in general, it is selected in such a range that the blocked isocyanate group equivalent is 400 to 6,000, preferably 1,000 to 5,000.
- the block isocyanato group equivalent is the mass of the polymer per mole of the blocked isocyanato group contained in the polymer, and is determined by dividing the mass of the polymer by the number of moles of the blocked isocyanato group contained in the polymer. Is possible (g / mol).
- the blocked isocyanato group equivalent is a theoretical value calculated from the charged amount of the blocked isocyanato group-containing monomer.
- the hydroxyl group-containing organic solvent (B) may be any organic solvent containing a hydroxyl group.
- ethyl lactate, diacetone alcohol, 3-methoxy-1-butanol and propylene glycol monomethyl ether are preferable from the viewpoint of film formability at the time of producing a cured coating film and availability, and propylene glycol monomethyl ether is particularly preferable. preferable.
- These hydroxyl group-containing organic solvents (B) may be used alone or in combination of two or more.
- photosensitivity is obtained by using the copolymer (A) containing the structural unit (a) having a block isocyanato group and the structural unit (b) having an acid group in combination with the hydroxyl group-containing organic solvent (B). Storage stability of the base resin composition is improved.
- the reactive diluent (C) is a compound having at least one polymerizable ethylenically unsaturated group as a polymerizable functional group in the molecule, and a compound having a plurality of polymerizable functional groups is preferable among them.
- Examples of monofunctional monomers used as the reactive diluent (C) include (meth) acrylamide, methylol (meth) acrylamide, methoxymethyl (meth) acrylamide, ethoxymethyl (meth) acrylamide, propoxymethyl (meth) acrylamide, butoxymethoxy Methyl (meth) acrylamide, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2- hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) Acrylate, 4-hydroxybutyl (meth) acrylate, 2-phenoxy-2-hydroxypropyl (meth) acrylate, 2- (meth) acryloyloxy-2-hydroxypropyl phthalate, glycerol Mono (meth) acrylate, tetrahydrofurfuryl (meth) acrylate,
- ethylene glycol di (meth) acrylate As a polyfunctional monomer used as a reactive diluent (C), ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, polypropylene glycol Di (meth) acrylate, butylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, 1,6-hexane glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, glycerin di (meth) Acrylate, pentaerythritol di (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol Hexa (meth
- (meth) acrylate such as tri (meth) acrylate of tris (hydroxyethyl) isocyanurate; aromatic vinyl compounds such as divinylbenzene, diallyl phthalate, diallyl benzene phosphonate; adipic acid
- aromatic vinyl compounds such as divinylbenzene, diallyl phthalate, diallyl benzene phosphonate; adipic acid
- dicarboxylic esters such as divinyl; triallyl cyanurate, methylene bis (meth) acrylamide, (meth) acrylamide methylene ether, and condensates of polyhydric alcohol and N-methylol (meth) acrylamide.
- These monomers may be used alone or in combination of two or more.
- the photopolymerization initiator (D) is not particularly limited, and examples thereof include benzoins such as benzoin, benzoin methyl ether, benzoin ethyl ether and benzoin butyl ether; acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1,1 -Dichloroacetophenone, 4- (1-t-butyldioxy-1-methylethyl) acetophenone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-propan-1-one, 2-benzyl-2 Acetophenones such as -dimethylamino-1- (4-morpholinophenyl) butanone-1; anthraquinones such as 2-methyl anthraquinone, 2-amyl anthraquinone, 2-t-butyl anthraquinone, 1-chloroanthraquinone, etc .;
- the photosensitive resin composition of the present invention may be blended with known additives such as known coupling agents, leveling agents and thermal polymerization inhibitors in order to impart predetermined properties. Good.
- the blending amount of these additives is not particularly limited as long as the effects of the present invention are not impaired.
- the photosensitive resin composition of the present invention may further contain a colorant (E) to make a photosensitive resin composition for a color filter.
- the colorant (E) is not particularly limited as long as it dissolves or disperses in the hydroxyl group-containing organic solvent (B), and examples thereof include dyes and pigments.
- the dye from the viewpoints of solubility in a hydroxyl group-containing organic solvent (B) and an alkali developer, interaction with other components in the photosensitive resin composition, heat resistance, etc., acidic groups such as carboxylic acid and sulfonic acid It is preferable to use an acid dye having an acid dye, a salt of the acid dye with a nitrogen compound, a sulfonamide of the acid dye, and the like.
- dyes examples include: acid alizarin violet N; acid black 1, 2, 24, 48; acid blue 1, 7, 9, 25, 29, 40, 45, 62, 70, 74, 80, 83, 90, 92, 112, 113, 120, 129, 147; acid chrome violet K; acid green 1, 3, 5, 25, 27, 50; acid orange 6, 7, 8, 10, 12, 50, 51, 52, 56, 63, 74, 95; acid red 1, 4, 8, 14, 17, 18, 26, 27, 29, 31, 34, 35, 37, 42, 44, 50, 51, 52, 57, 69, 73 80, 87, 88, 91, 92, 94, 97, 103, 111, 114, 129, 133 134, 138, 143, 145, 150, 151, 158, 176, 183, 198, 211, 215, 216, 217, 249, 252, 257, 260, 266, 274; acid violet 6B, 7, 9, 17, 19; acid yellow 1, 3, 9, 11, 17, 17, 23, 25, 29, 34, 36, 42, 54,
- an azo-based, xanthene-based, anthraquinone-based or phthalocyanine-based acid dye is preferable. These dyes may be used alone or in combination of two or more, depending on the color of the target pixel.
- pigments examples include C.I. I. Pigment yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 128, 137, 138, 139, Yellow pigments such as 147, 148, 150, 153, 154, 166, 173, 194, 214; I. Orange pigments such as C.I. pigment oranges 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, 71, 73; I.
- colorants (E) may be used alone or in combination of two or more, depending on the color of the target pixel. In addition, according to the color of the pixel made into the objective, it can also be used combining said dye and a pigment.
- a known dispersant may be added to the photosensitive resin composition from the viewpoint of improving the dispersibility of the pigment.
- a dispersing agent it is preferable to use the polymeric dispersing agent which is excellent in the dispersion stability over time.
- polymer dispersants include urethane dispersants, polyethyleneimine dispersants, polyoxyethylene alkyl ether dispersants, polyoxyethylene glycol diester dispersants, sorbitan aliphatic ester dispersants, aliphatic modified esters A system dispersant etc. are mentioned.
- EFKA manufactured by F-KA Chemical's BV (EFKA) Co., Ltd.
- Disperbyk manufactured by BIC Chemie Co., Ltd.
- Disperon manufactured by Kushimoto Chemical Co., Ltd.
- the compounding amount of the dispersant may be appropriately set according to the type of the pigment to be used.
- the compounding amounts of the copolymer (A), the hydroxyl group-containing organic solvent (B), the reactive diluent (C), the photopolymerization initiator (D) and the colorant (E) in the photosensitive resin composition for color filter are as follows: 10 to 100 parts by mass of the copolymer (A), containing hydroxyl groups, based on 100 parts by mass of the total amount of the copolymer (A) and the reactive diluent (C) in the photosensitive resin composition for color filter 30 to 1,000 parts by mass of the organic solvent (B), more than 0 to 90 parts by mass of the reactive diluent (C), 0.1 to 30 parts by mass of the photopolymerization initiator (D), E) is 5 to 80 parts by mass, preferably 20 to 80 parts by mass of the copolymer (A), 50 to 800 parts by mass of the hydroxyl group-containing organic solvent (B), and 20 of the reactive diluent (C) 80 parts by mass, 0.5 to 20 parts by mass of the photo
- the photosensitive resin composition of the present invention can be produced by mixing the above-mentioned components using a known mixing apparatus. Further, the copolymer (A) and the hydroxyl group-containing organic solvent (B) are obtained by the copolymerization reaction of the block isocyanato group-containing (meth) acrylate and the unsaturated carboxylic acid in the presence of the hydroxyl group-containing organic solvent (B) It is also possible to prepare by mixing a reactive diluent (C), a photopolymerization initiator (D) and an optional colorant (E) after preparing a composition containing
- the photosensitive resin composition obtained as described above is suitable as a resist since it has alkali developability. Curing of the photosensitive resin composition may be appropriately selected at a baking temperature within a range of 250 ° C. or less, but since the copolymer (A) used in the present invention is excellent in curability at low temperatures, conventional materials can be used.
- the baking temperature can be lower compared to.
- a pigment is used as the colorant (E) in the photosensitive resin composition, sufficient curability can be obtained even at a baking temperature of 160 ° C. or less.
- the photosensitive resin composition of the present invention is advantageous in terms of energy consumption because the crosslinking reaction proceeds sufficiently even if the baking temperature is lowered.
- the baking temperature is preferably 160 ° C. or less, more preferably 150 ° C. or less.
- the lower limit of the baking temperature is not necessarily uniform depending on the kind of block isocyanato group contained in the copolymer (A), but it is required to be equal to or higher than the dissociation temperature of the block isocyanato group, usually 80 ° C.
- the temperature is preferably 90 ° C. or more, more preferably 100 ° C. or more. If the baking temperature is too low, it will be difficult to sufficiently improve the solvent resistance of the coating.
- the baking time can be selected as appropriate, but is usually 10 minutes to 4 hours, preferably 20 minutes to 2 hours.
- the photosensitive resin composition of the present invention is a resist used to manufacture various resists, in particular, color filters to be incorporated into organic EL displays (for black PDL), liquid crystal displays, solid-state imaging devices such as CCDs and CMOS, etc. Is preferred.
- the photosensitive resin composition of this invention gives the cured coating film excellent in the solvent resistance, the hardening characteristic in low temperature, etc., it can also be used for various coatings, an adhesive agent, the binder for printing inks, etc.
- the photosensitive resin composition of the present invention is excellent in developability and storage stability, and can form a colored pattern excellent in solvent resistance even when the baking temperature at the time of pattern formation is lowered. It is very useful as a photosensitive material for filters.
- the photosensitive resin composition of the present invention can also contribute to the development of the flexible display with low temperature curing, the reduction of the energy consumption in the manufacturing process, and the alleviation of the restriction of the colorant used.
- the color filter of the present invention has a colored pattern formed using the photosensitive resin composition for color filter described above.
- the color filter is usually composed of a substrate, RGB pixels formed thereon, a black matrix formed at the boundary of each pixel, and a protective film formed on the pixels and the black matrix.
- the other configuration can be a known one.
- a colored pattern is formed on a substrate. Specifically, black matrix and RGB pixels are sequentially formed on the substrate.
- the material of the substrate is not particularly limited, and a glass substrate, a silicon substrate, a polycarbonate substrate, a polyester substrate, a polyamide substrate, a polyamide imide substrate, a polyimide substrate, an aluminum substrate, a printed wiring substrate, an array substrate, etc. may be used appropriately. it can.
- the colored pattern can be formed by photolithography. Specifically, after the above-mentioned photosensitive resin composition is applied on a substrate to form a coating film, the coating film is exposed through a photomask of a predetermined pattern to photocure the exposed portion. Then, after developing the unexposed portion with an aqueous alkaline solution, baking can be performed to form a predetermined colored pattern.
- the method for applying the photosensitive resin composition is not particularly limited, but screen printing, roll coating, curtain coating, spray coating, spin coating, etc. can be used.
- coating of the photosensitive resin composition you may volatilize a hydroxyl-containing organic solvent (B) by heating using heating means, such as a circulation type oven, an infrared heater, a hotplate, as needed.
- the heating conditions are not particularly limited, and may be appropriately set according to the type of photosensitive resin composition to be used. Generally, heating may be performed at a temperature of 50 ° C. to 120 ° C. for 30 seconds to 30 minutes.
- the formed coating film is partially exposed by irradiation with active energy rays such as ultraviolet light and excimer laser light through a negative mask.
- active energy rays such as ultraviolet light and excimer laser light through a negative mask.
- the energy dose to be irradiated may be appropriately selected according to the composition of the photosensitive resin composition, and for example, preferably 30 to 2000 mJ / cm 2 .
- the light source used for exposure is not particularly limited, and a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, a xenon lamp, a metal halide lamp and the like can be used.
- the aqueous alkaline solution used for development is not particularly limited, but aqueous solutions of sodium carbonate, potassium carbonate, calcium carbonate, sodium hydroxide, potassium hydroxide and the like; aqueous solutions of amine compounds such as ethylamine, diethylamine, dimethylethanolamine and the like; Methyl ammonium, 3-methyl-4-amino-N, N-diethylaniline, 3-methyl-4-amino-N-ethyl-N- ⁇ -hydroxyethylaniline, 3-methyl-4-amino-N-ethyl- N- ⁇ -methanesulfonamidoethylaniline, 3-methyl-4-amino-N-ethyl-N- ⁇ -methoxyethylaniline and p-phenylenediamines such as sulfates, hydrochlorides or p-toluenesulfonates thereof An aqueous solution of a compound of the series can be used.
- the conditions for baking are not particularly limited, and heat treatment may be performed depending on the type of photosensitive resin composition to be used.
- the baking temperature is 200 ° C. or lower, the solvent resistance of the coloring pattern is insufficient, but in the case of the photosensitive resin composition for color filter of the present invention, the baking is performed at a temperature of 120 ° C. or lower. Even if it is, the coloring pattern which shows sufficient solvent resistance can be formed. Therefore, the baking temperature can be lowered, and in the case of baking at high temperature, the processing time can be shortened, which is a great advantage in manufacturing.
- the baking temperature is usually 210 ° C. or less, preferably 160 ° C. or less, more preferably 120 ° C. or less, and the baking time is usually 10 minutes to 4 hours, preferably 20 minutes to 2 hours. To be done.
- a desired colored pattern can be obtained by sequentially repeating application, exposure, development and baking as described above using a photosensitive resin composition for a black matrix and photosensitive resin compositions for red, green and blue pixels. It can be formed.
- the formation method of the coloring pattern by photocuring was demonstrated above, if it uses the photosensitive resin composition which mix
- a protective film is formed on the coloring pattern (each pixel of RGB and a black matrix).
- the protective film is not particularly limited, and may be formed using a known one.
- the color filter produced in this manner is excellent in sensitivity and developability, and is produced using a photosensitive resin composition capable of curing at low temperature and giving a colored pattern excellent in solvent resistance. It has an excellent colored pattern with little color change.
- the image display element of the present invention is an image display element provided with the above-mentioned color filter, and specific examples thereof include liquid crystal display elements, organic EL display elements, solid-state imaging elements such as CCD elements and CMOS elements.
- the image display device of the present invention may be produced according to a conventional method except using the above color filter. For example, in the case of manufacturing a liquid crystal display element, the color filter is formed on a substrate, and then an electrode, a spacer, and the like are sequentially formed. Then, an electrode or the like may be formed over another substrate, and both may be attached to each other to inject and seal a predetermined amount of liquid crystal.
- the measuring method of an acid value and a weight average molecular weight is as follows.
- Acid value the acid value of the copolymer (A) measured according to JIS K 6901 5.3, which is the water required to neutralize the acidic component contained in 1 g of the copolymer (A) The number of mg of potassium oxide is meant.
- Weight average molecular weight (Mw) means standard polystyrene equivalent weight average molecular weight measured under the following conditions using gel permeation chromatography (GPC).
- the mixture was stirred at 78 ° C. for 3 hours to carry out a copolymerization reaction to form a copolymer.
- a polymer composition of 1 (component concentration other than solvent 35% by mass) was obtained.
- the weight average molecular weight of the copolymer in the obtained polymer composition was 9,100, and the acid value was 121.5 KOHmg / g.
- This green pigment dispersion was mixed with other compounding components shown in Table 3 (that is, polymer composition, reactive diluent, photopolymerization initiator and solvent) to prepare a photosensitive resin composition.
- the blend ratio of each component is as shown in Table 3.
- the photosensitive resin compositions of Examples 1 to 9 were the same as sample Nos.
- the photosensitive resin compositions of Comparative Examples 1 to 2 prepared using each of the polymer compositions 1 to 9 were the same as Sample Nos. It was prepared using each of 10 to 11 polymer compositions. Further, the amount of the polymer composition includes the solvent contained at the end of the copolymer reaction, and the amount of the solvent contained in each sample is also added to the solvent as the compounding component.
- the unexposed area is dissolved and developed by spraying an aqueous solution containing 0.1% by mass of sodium carbonate at a temperature of 23 ° C. and a pressure of 0.3 MPa, followed by baking at 100 ° C. for 20 minutes.
- a predetermined pattern was formed.
- the residue after alkali development was confirmed by observing the pattern after alkali development using an electron microscope S-3400 manufactured by Hitachi High-Technologies Corporation. The criteria for this evaluation are as follows. ⁇ : no residue ⁇ : residue present Table 4 shows the evaluation results of alkali developability.
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Abstract
Description
また、本発明は、耐溶剤性に優れた着色パターンを有するカラーフィルター及びその製造方法並びに該カラーフィルターを具備する画像表示素子を提供することを目的とする。
[1]ブロックイソシアナト基を有する構成単位(a)及び酸基を有する構成単位(b)を含有する共重合体(A)と、水酸基含有有機溶剤(B)と、反応性希釈剤(C)と、光重合開始剤(D)とを含有することを特徴とする感光性樹脂組成物。
[2]前記ブロックイソシアナト基を有する構成単位(a)が、ブロックイソシアナト基含有(メタ)アクリレート由来の構成単位であり、前記ブロックイソシアナト基含有(メタ)アクリレートのブロックイソシアナト基の解離率が100℃で30分加熱した際、5~99質量%である[1]に記載の感光性樹脂組成物。
[3]前記ブロックイソシアナト基を有する構成単位(a)のブロック剤が、マロン酸ジエチル、3,5-ジメチルピラゾール及びメチルエチルケトオキシムからなる群から選択される1種以上である[1]又は[2]に記載の感光性樹脂組成物。
[4]前記水酸基含有有機溶剤(B)が、エチレングリコールモノアルキルエーテル、ジエチレングリコールモノアルキルエーテル、プロピレングリコールモノアルキルエーテル、プロピレングリコールモノアリールエーテル、ジプロピレングリコールモノアルキルエーテル、トリプロピレングリコールモノアルキルエーテル、3-メトキシ-1-ブタノール、1,3-プロパンジオールモノアルキルエーテル、1,3-ブタンジオールモノアルキルエーテル、1,4-ブタンジオールモノアルキルエーテル、グリセリンモノアルキルエーテル、グリセリンジアルキルエーテル、メタノール、エタノール、プロパノール、C5-6シクロアルカンジオール、C5-6シクロアルカンジメタノール、乳酸エチル及びジアセトンアルコールからなる群から選択される1種以上である[1]~[3]のいずれかに記載の感光性樹脂組成物。
[5]前記酸基を有する構成単位(b)が、不飽和カルボン酸由来の構成単位である[1]~[4]のいずれかに記載の感光性樹脂組成物。
[6]前記共重合体(A)が、前記ブロックイソシアナト基を有する構成単位(a)を1~40モル%及び前記酸基を有する構成単位(b)を1~60モル%含有する[1]~[5]のいずれかに記載の感光性樹脂組成物。
[7]前記共重合体(A)における前記ブロックイソシアナト基を有する構成単位(a)と前記酸基を有する構成単位(b)とのモル比率が、10:90~50:50である[1]~[6]のいずれかに記載の感光性樹脂組成物。
[8]前記共重合体(A)が、メタクリル酸2-(3,5-ジメチルピラゾール-1-イル)カルボニルアミノエチル、メタクリル酸2-[O-(1’-メチルプロピリデンアミノ)カルボキシアミノ]エチル、マロン酸-2-[[[2-メチル-1-オキソ-2-プロペニル]オキシ]エチル]アミノ]カルボニル]-1,3ジエチルエステル、安息香酸-4-[[[[2-[(2-メチル-1-オキソ-2-プロペン-1-イル)オキシ]エチル]アミン]カルボニル]オキシ]メチルエステル、安息香酸-2-[[[[2-[(2-メチル-1-オキシ-2-プロペン-1-イル)オキシ]エチル]アミン]カルボニル]オキシ]メチルエステル、及び2-プロペン酸-2-メチル-2-[[(3,5-ジメチルフェノキシ)カルボニル]アミン]エチルエステルからなる群から選択される少なくとも1種由来の構成単位(a)と、(メタ)アクリル酸由来の構成単位(b)と、グリシジル(メタ)アクリレート、2-ヒドロキシエチル(メタ)アクリレート、ジシクロペンタニル(メタ)アクリレート及びメチル(メタ)アクリレートからなる群から選択される少なくとも1種由来の構成単位(c)とを含有する[1]~[7]のいずれかに記載の感光性樹脂組成物。
[9]着色剤(E)をさらに含有し、カラーフィルター用である[1]~[8]のいずれかに記載の感光性樹脂組成物。
[10]前記共重合体(A)と前記反応性希釈剤(C)との合計量100質量部に対して、前記共重合体(A)が10~100質量部、前記水酸基含有有機溶剤(B)が30~1,000質量部、前記反応性希釈剤(C)が0質量部超~90質量部、前記光重合開始剤(D)が0.1~30質量部及び前記着色剤(E)が5~80質量部含有される[9]に記載の感光性樹脂組成物。
[11]前記着色剤(E)が、顔料を含む[9]又は[10]に記載の感光性樹脂組成物。
また、本発明によれば、耐溶剤性に優れた着色パターンを有するカラーフィルター及びその製造方法並びに該カラーフィルターを具備する画像表示素子を提供することができる。
本発明の感光性樹脂組成物は、ブロックイソシアナト基を有する構成単位(a)及び酸基を有する構成単位(b)を含有する共重合体(A)と、水酸基含有有機溶剤(B)と、反応性希釈剤(C)と、光重合開始剤(D)とを含有することを特徴とする。
<ブロックイソシアナト基を有する構成単位(a)>
共重合体(A)が含有するブロックイソシアナト基を有する構成単位(a)は、ブロックイソシアナト基含有モノマー由来の構成単位である。該モノマーとしては、エチレン性不飽和結合とブロックイソシアナト基とを有するモノマー等、例えば、分子中にビニル基、(メタ)アクリロイルオキシ基等を有するイソシアネート化合物におけるイソシアナト基を、ブロック剤でブロック化した化合物が挙げられる。イソシアネート化合物とブロック剤との反応は、溶剤の存在の有無に関わらず行うことができる。溶剤を用いる場合、イソシアナト基に対して不活性な溶剤を用いる必要がある。ブロック化反応に際して、錫、亜鉛、鉛等の有機金属塩、3級アミン等を触媒として用いてもよい。反応は、一般に-20~150℃で行うことができるが、0~100℃で行うことが好ましい。前記イソシアネート化合物の例としては、下記式(1)で表される化合物を挙げることができる。
共重合体(A)が含有する酸基を有する構成単位(b)は、酸基含有モノマー由来の構成単位である(ただし、前記ブロックイソシアナト基を有する構成単位(a)に該当するものは除く)。酸基としては、カルボキシル基、スルホ基、ホスホ基等が挙げられ、これらの中でも、入手しやすさの面からカルボキシル基が好ましい。酸基を有する構成単位(b)を与えるモノマーとしては、重合性不飽和結合と酸基とを有するモノマー、例えば、不飽和カルボン酸又はその無水物、不飽和スルホン酸、不飽和ホスホン酸等が挙げられる。好ましいモノマーの具体例としては、(メタ)アクリル酸、α-ブロモ(メタ)アクリル酸、β-フリル(メタ)アクリル酸、クロトン酸、プロピオール酸、ケイ皮酸、α-シアノケイ皮酸、マレイン酸、無水マレイン酸、マレイン酸モノメチル、マレイン酸モノエチル、マレイン酸モノイソプロピル、フマル酸、イタコン酸、無水イタコン酸、シトラコン酸、無水シトラコン酸等の不飽和カルボン酸又はその無水物;2-アクリルアミド-2-メチルプロパンスルホン酸、tert-ブチルアクリルアミドスルホン酸、p-スチレンスルホン酸などの不飽和スルホン酸;ビニルホスホン酸などの不飽和ホスホン酸;などが挙げられる。これらのモノマーは、単独で用いてもよく、2種以上を組み合わせて用いてもよい。これらの中でも、アルカリ現像性に優れること及び入手の容易性の観点から、不飽和カルボン酸が好ましく、(メタ)アクリル酸がより好ましい。
本発明においては、共重合体(A)が含有する構成単位として、ブロックイソシアナト基を有する構成単位(a)及び酸基を有する構成単位(b)と共に、これらと共重合可能なその他の構成単位(c)が含有されてもよい(ただし、前記ブロックイソシアナト基を有する構成単位(a)及び前記酸基を有する構成単位(b)に該当するものは除く)。その他の構成単位(c)の具体例としては、エポキシ基を有する構成単位(c-1)、水酸基を有する構成単位(c-2)、(c-1)及び(c-2)以外の構成単位(c-3)などが挙げられる。共重合体(A)が含有するその他の構成単位(c)の割合は、特に制限はないが、好ましくは0~80モル%、より好ましくは0~70モル%、最も好ましくは0~60モル%である。
共重合体(A)の製造に際して使用されるブロックイソシアナト基含有モノマー(a0)及び酸基含有モノマー(b0)の割合は、特に制限はないが、好ましくは、(a0)1~40モル%及び(b0)1~60モル%、より好ましくは、(a0)2~30モル%及び(b0)10~50モル%、最も好ましくは、(a0)3~25モル%及び(b0)15~40モル%である。共重合体(A)がその他の構成単位(c)をさらに含有する場合、共重合体(A)の製造に際して使用されるブロックイソシアナト基含有モノマー(a0)、酸基含有モノマー(b0)及びその他のモノマー(c0)の割合は、好ましくは、(a0)1~40モル%、(b0)1~60モル%及び(c0)0モル%超~80モル%、より好ましくは、(a0)2~30モル%、(b0)10~50モル%及び(c0)0モル%超~70モル%、最も好ましくは、(a0)3~25モル%、(b0)15~40モル%及び(c0)0モル%超~60モル%である。
水酸基含有有機溶剤(B)は、水酸基を含有する有機溶剤であればよく、例えば、エチレングリコールモノアルキルエーテル、ジエチレングリコールモノアルキルエーテル、プロピレングリコールモノアルキルエーテル、プロピレングリコールモノアリールエーテル、ジプロピレングリコールモノアルキルエーテル、トリプロピレングリコールモノアルキルエーテル、3-メトキシ-1-ブタノール、1,3-プロパンジオールモノアルキルエーテル、1,3-ブタンジオールモノアルキルエーテル、1,4-ブタンジオールモノアルキルエーテル、グリセリンモノアルキルエーテル、グリセリンジアルキルエーテル、メタノール、エタノール、プロパノール、C5-6シクロアルカンジオール、C5-6シクロアルカンジメタノール、乳酸エチル及びジアセトンアルコールなどが挙げられる。これらの中でも、硬化塗膜作製時の製膜性及び入手の容易性の観点から、乳酸エチル、ジアセトンアルコール、3-メトキシ-1-ブタノール及びプロピレングリコールモノメチルエーテルが好ましく、プロピレングリコールモノメチルエーテルが特に好ましい。これらの水酸基含有有機溶剤(B)は、単独で用いてもよく、2種以上を組み合わせて用いてもよい。
反応性希釈剤(C)は、分子内に重合性官能基として少なくとも一つの重合可能なエチレン性不飽和基を有する化合物であり、中でも重合性官能基を複数有する化合物が好ましい。このような反応性希釈剤(C)を共重合体(A)と併用することにより、粘度を調整したり、形成される硬化物の強度や、基材に対する密着性を向上させることができる。
光重合開始剤(D)としては、特に限定されないが、例えば、ベンゾイン、ベンゾインメチルエーテル、ベンゾインエチルエーテル、ベンゾインブチルエーテルなどのベンゾイン類;アセトフェノン、2,2-ジメトキシ-2-フェニルアセトフェノン、1,1-ジクロロアセトフェノン、4-(1-t-ブチルジオキシ-1-メチルエチル)アセトフェノン、2-メチル-1-[4-(メチルチオ)フェニル]-2-モルホリノ-プロパン-1-オン、2-ベンジル-2-ジメチルアミノ-1-(4-モルホリノフェニル)ブタノン-1などのアセトフェノン類;2-メチルアントラキノン、2-アミルアントラキノン、2-t-ブチルアントラキノン、1-クロロアントラキノンなどのアントラキノン類;キサントン、チオキサントン、2,4-ジメチルチオキサントン、2,4-ジイソプロピルチオキサントン、2-クロロチオキサントンなどのチオキサントン類;アセトフェノンジメチルケタール、ベンジルジメチルケタールなどのケタール類;ベンゾフェノン、4-(1-t-ブチルジオキシ-1-メチルエチル)ベンゾフェノン、3,3’,4,4’-テトラキス(t-ブチルジオキシカルボニル)ベンゾフェノンなどのベンゾフェノン類;アシルホスフィンオキサイド類;などが挙げられる。これらの光重合開始剤(D)は、単独で用いてもよく、2種以上を組み合わせて用いてもよい。
また、本発明の感光性樹脂組成物には、着色剤(E)をさらに含有させて、カラーフィルター用感光性樹脂組成物とすることができる。
本発明の感光性樹脂組成物は、公知の混合装置を用い、上記の成分を混合することによって製造することができる。また、水酸基含有有機溶剤(B)の存在下でブロックイソシアナト基含有(メタ)アクリレートと不飽和カルボン酸とを共重合反応させることにより、共重合体(A)及び水酸基含有有機溶剤(B)を含む組成物を調製した後、反応性希釈剤(C)、光重合開始剤(D)及び任意成分である着色剤(E)を混合して製造することも可能である。
次に、本発明のカラーフィルター用感光性樹脂組成物の硬化物からなる着色パターンを有するカラーフィルターについて説明する。本発明のカラーフィルターは、上記したカラーフィルター用感光性樹脂組成物を用いて形成される着色パターンを有する。カラーフィルターは、通常、基板と、その上に形成されるRGBの画素、それぞれの画素の境界に形成されるブラックマトリックス及び画素とブラックマトリックスの上に形成される保護膜とから構成される。この構成において、画素及びブラックマトリックス(着色パターン)が上記したカラーフィルター用感光性樹脂組成物を用いて形成されることを除けば、その他の構成は公知のものを採用することができる。
本発明の画像表示素子は、上記のカラーフィルターを備えた画像表示素子であり、その具体例として、液晶表示素子、有機EL表示素子、CCD素子やCMOS素子などの固体撮像素子などが挙げられる。本発明の画像表示素子の製造は、上記のカラーフィルターを使用すること以外、常法に従って行えばよい。例えば、液晶表示素子を製造する場合には、基板上に、上記カラーフィルターを形成し、次いで、電極、スペーサー等を順次形成する。そして、もう一枚の基板上に電極等を形成し、両者を張り合わせて所定量の液晶を注入、封止すればよい。
(1)酸価:JIS K6901 5.3に従って測定された共重合体(A)の酸価であって、該共重合体(A)1g中に含まれる酸性成分を中和するのに要する水酸化カリウムのmg数を意味する。
(2)重量平均分子量(Mw)とは、ゲルパーミエーションクロマトグラフィー(GPC)を用いて、下記条件にて測定した標準ポリスチレン換算重量平均分子量を意味する。
カラム:ショウデックス(登録商標) LF-804+LF-804(昭和電工株式会社製)
カラム温度:40℃
試料:共重合体の0.2%テトラヒドロフラン溶液
展開溶媒:テトラヒドロフラン
検出器:示差屈折計(ショウデックス RI-71S)(昭和電工株式会社製)
流速:1mL/min
攪拌装置、滴下ロート、コンデンサー、温度計及びガス導入管を備えたフラスコに、149.3gのプロピレングリコールモノメチルエーテルを入れた後、窒素置換しながら攪拌し、78℃に昇温した。次に、22.4gのジシクロペンタニルメタクリレート、17.2gのメタクリル酸及び50.2gのメタクリル酸2-(3,5-ジメチルピラゾール-1-イル)カルボニルアミノエチル(カレンズMOI-BP、昭和電工株式会社製、ブロックイソシアナト基の解離率:70質量%)からなる単量体混合物と、11.2gの2、2’-アゾビス(2、4-ジメチルバレロニトリル)(重合開始剤)を62.8gのプロピレングリコールモノメチルエーテルアセテートに添加し溶解させたものをそれぞれ滴下ロートからフラスコ中に滴下した。滴下終了後、78℃で3時間攪拌して共重合反応を行い、共重合体を生成させ、試料No.1の重合体組成物(溶剤以外の成分濃度35質量%)を得た。得られた重合体組成物中の共重合体の重量平均分子量は9,100であり、酸価は121.5KOHmg/gであった。
表1及び2に記載の原料を用いる以外は合成例1と同様の条件で共重合反応を行い、試料No.2~11の重合体組成物(溶剤以外の成分濃度35質量%)を得た。得られた重合体組成物中の共重合体の重量平均分子量及び酸価を表1及び2に示す。なお、表1及び2において、メタクリル酸2-[O-(1’-メチルプロプリデンアミノ)カルボキシアミノ]エチルは、昭和電工株式会社製、カレンズMOI-BM、ブロックイソシアナト基の解離率:18質量%)であり、マロン酸-2-[[[2-メチル-1-オキソ-2-プロペニル]オキシ]エチル]アミノ]カルボニル]-1,3ジエチルエステルは、昭和電工株式会社製、カレンズMOI-DEM、ブロックイソシアナト基の解離率:90質量%であり、安息香酸-4-[[[[2-[(2-メチル-1-オキソ-2-プロペン-1-イル)オキシ]エチル]アミン]カルボニル]オキシ]メチルエステルは、ブロックイソシアナト基の解離率:40質量%であり、安息香酸-2-[[[[2-[(2-メチル-1-オキシ-2-プロペン-1-イル)オキシ]エチル]アミン]カルボニル]オキシ]メチルエステルは、ブロックイソシアナト基の解離率:75質量%であり、2-プロペン酸-2-メチル-2-[[(3,5-ジメチルフェノキシ)カルボニル]アミン]エチルエステルは、ブロックイソシアナト基の解離率:28質量%である。
<感光性樹脂組成物(顔料タイプ)の調製>
直径0.5mmのジルコニアビーズ200gを充填したステンレス製容器に、C.Iピグメントグリーン36(着色剤)を100質量部、プロピレングリコールモノメチルエーテルアセテートを44.98質量部、分散剤(ビッグケミー・ジャパン株式会社製Disperbyk-161)を25質量部投入して、ペイントシェーカーで2時間混合して分散させることにより、緑色顔料分散液を調製した。
この緑色顔料分散液を、表3に示すその他の配合成分(即ち、重合体組成物、反応性希釈剤、光重合開始剤及び溶剤)と混合して感光性樹脂組成物を調製した。それぞれの成分の配合割合は、表3に示すとおりである。なお、実施例1~9の感光性樹脂組成物は、試料No.1~9の重合体組成物それぞれを用いて調製し、比較例1~2の感光性樹脂組成物は、試料No.10~11の重合体組成物それぞれを用いて調製した。また、重合体組成物の量は共重合体反応終了時に含まれる溶剤を含み、各試料に含まれる溶剤の量も、配合成分としての溶剤の中に合算されている。
(1)アルカリ現像性
実施例1~9及び比較例1~2の感光性樹脂組成物それぞれを、5cm角のガラス基板(無アルカリガラス基板)上に、露光後の厚さが2.5μmとなるようにスピンコートした後、90℃で3分間加熱することで溶剤を揮発させた。次に、塗布膜から100μmの距離に所定のパターンのフォトマスクを配置し、このフォトマスクを介して塗布膜を露光(露光量150mJ/cm2)し、露光部分を光硬化させた。次に、0.1質量%の炭酸ナトリウムを含む水溶液を23℃の温度及び0.3MPaの圧力でスプレーすることによって未露光部分を溶解して現像した後、100℃で20分間ベーキングすることで所定のパターンを形成した。アルカリ現像後の残渣は、アルカリ現像後のパターンを、(株)日立ハイテクノロジーズ製電子顕微鏡S-3400を用いて観察することにより確認した。この評価の基準は以下の通りである。
○:残渣なし
×:残渣あり
アルカリ現像性の評価結果を表4に示す。
5cm角のガラス基板(無アルカリガラス基板)上に、実施例1~9及び比較例1~2の感光性樹脂組成物それぞれを、ベーキング後の厚さが2.5μmとなるようにスピンコートした後、90℃で3分間加熱して溶剤を揮発させた。次に、塗布膜に波長365nmの光を露光し、露光部分を光硬化させたのち、ベーキング温度100℃の乾燥器中に20分間放置して硬化塗膜を作製した。容量500mLの蓋付きガラス瓶に200mLのプロピレングリコールモノメチルエーテルアセテートを入れ、80℃の条件下に静置した。その中に上記の硬化塗膜付き試験片を浸漬した後、80℃に維持した状態で、5分静置した。試験片をプロピレングリコールモノメチルエーテルアセテートへ浸漬させる前後の色変化(ΔE*ab)を分光光度計UV-1650PC(株式会社島津製作所製)にて測定した。ΔE*abの測定結果を表4に示す。ΔE*abが1.5以下であれば耐溶剤性に優れているといえる。
合成例1~9及び比較合成例1~2の共重合体を、ガラス容器に等量ずつ計り取り、ほこりなどが入らないようにアルミニウム箔で口を閉じた。次に、これらのサンプルをそれぞれ23℃に保った恒温器の中に静置し、サンプルの1ヶ月後の重量平均分子量(Mw)を測定した。1ヶ月後のMwの変化率を表5に示す。1ヶ月後のMwの変化率が20%以内であれば、共重合体の保存安定性が優れているといえる。
Claims (15)
- ブロックイソシアナト基を有する構成単位(a)及び酸基を有する構成単位(b)を含有する共重合体(A)と、水酸基含有有機溶剤(B)と、反応性希釈剤(C)と、光重合開始剤(D)とを含有することを特徴とする感光性樹脂組成物。
- 前記ブロックイソシアナト基を有する構成単位(a)が、ブロックイソシアナト基含有(メタ)アクリレート由来の構成単位であり、前記ブロックイソシアナト基含有(メタ)アクリレートのブロックイソシアナト基の解離率が100℃で30分加熱した際、5~99質量%である請求項1に記載の感光性樹脂組成物。
- 前記ブロックイソシアナト基を有する構成単位(a)のブロック剤が、マロン酸ジエチル、3,5-ジメチルピラゾール及びメチルエチルケトオキシム、4-ヒドロキシ安息香酸メチル、2-ヒドロキシ安息香酸メチル及び3,5-キシレノールからなる群から選択される1種以上である請求項1又は2に記載の感光性樹脂組成物。
- 前記水酸基含有有機溶剤(B)が、エチレングリコールモノアルキルエーテル、ジエチレングリコールモノアルキルエーテル、プロピレングリコールモノアルキルエーテル、プロピレングリコールモノアリールエーテル、ジプロピレングリコールモノアルキルエーテル、トリプロピレングリコールモノアルキルエーテル、3-メトキシ-1-ブタノール、1,3-プロパンジオールモノアルキルエーテル、1,3-ブタンジオールモノアルキルエーテル、1,4-ブタンジオールモノアルキルエーテル、グリセリンモノアルキルエーテル、グリセリンジアルキルエーテル、メタノール、エタノール、プロパノール、C5-6シクロアルカンジオール、C5-6シクロアルカンジメタノール、乳酸エチル及びジアセトンアルコールからなる群から選択される1種以上である請求項1~3のいずれか一項に記載の感光性樹脂組成物。
- 前記酸基を有する構成単位(b)が、不飽和カルボン酸由来の構成単位である請求項1~4のいずれか一項に記載の感光性樹脂組成物。
- 前記共重合体(A)が、前記ブロックイソシアナト基を有する構成単位(a)を1~40モル%及び前記酸基を有する構成単位(b)を1~60モル%含有する請求項1~5のいずれか一項に記載の感光性樹脂組成物。
- 前記共重合体(A)における前記ブロックイソシアナト基を有する構成単位(a)と前記酸基を有する構成単位(b)とのモル比率が、10:90~50:50である請求項1~6のいずれか一項に記載の感光性樹脂組成物。
- 前記共重合体(A)が、メタクリル酸2-(3,5-ジメチルピラゾール-1-イル)カルボニルアミノエチル、メタクリル酸2-[O-(1’-メチルプロピリデンアミノ)カルボキシアミノ]エチル、マロン酸-2-[[[2-メチル-1-オキソ-2-プロペニル]オキシ]エチル]アミノ]カルボニル]-1,3ジエチルエステル、安息香酸-4-[[[[2-[(2-メチル-1-オキソ-2-プロペン-1-イル)オキシ]エチル]アミン]カルボニル]オキシ]メチルエステル、安息香酸-2-[[[[2-[(2-メチル-1-オキシ-2-プロペン-1-イル)オキシ]エチル]アミン]カルボニル]オキシ]メチルエステル及び2-プロペン酸-2-メチル-2-[[(3,5-ジメチルフェノキシ)カルボニル]アミン]エチルエステルからなる群から選択される少なくとも1種由来の構成単位(a)と、(メタ)アクリル酸由来の構成単位(b)と、グリシジル(メタ)アクリレート、2-ヒドロキシエチル(メタ)アクリレート、ジシクロペンタニル(メタ)アクリレート及びメチル(メタ)アクリレートからなる群から選択される少なくとも1種由来の構成単位(c)とを含有する請求項1~7のいずれか一項に記載の感光性樹脂組成物。
- 着色剤(E)をさらに含有し、カラーフィルター用である請求項1~8のいずれか一項に記載の感光性樹脂組成物。
- 前記共重合体(A)と前記反応性希釈剤(C)との合計量100質量部に対して、前記共重合体(A)が10~100質量部、前記水酸基含有有機溶剤(B)が30~1,000質量部、前記反応性希釈剤(C)が0質量部超~90質量部、前記光重合開始剤(D)が0.1~30質量部及び前記着色剤(E)が5~80質量部含有される請求項9に記載の感光性樹脂組成物。
- 前記着色剤(E)が、顔料を含む請求項9又は10に記載の感光性樹脂組成物。
- 請求項9~11のいずれか一項に記載の感光性樹脂組成物の硬化物からなる着色パターンを有することを特徴とするカラーフィルター。
- 請求項12に記載のカラーフィルターを具備することを特徴とする画像表示素子。
- 請求項9~11のいずれか一項に記載の感光性樹脂組成物を基板に塗布し、露光し、アルカリ現像した後、160℃以下の温度でベーキングして着色パターンを形成する工程を含むことを特徴とするカラーフィルターの製造方法。
- 水酸基含有有機溶剤(B)の存在下でブロックイソシアナト基含有(メタ)アクリレートと不飽和カルボン酸とを共重合反応させて共重合体(A)を合成し、次いで、反応性希釈剤(C)及び光重合開始剤(D)を配合する工程を含むことを特徴とする感光性樹脂組成物の製造方法。
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