WO2022102368A1 - 顔料分散組成物、及び感光性着色組成物 - Google Patents
顔料分散組成物、及び感光性着色組成物 Download PDFInfo
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- WO2022102368A1 WO2022102368A1 PCT/JP2021/038981 JP2021038981W WO2022102368A1 WO 2022102368 A1 WO2022102368 A1 WO 2022102368A1 JP 2021038981 W JP2021038981 W JP 2021038981W WO 2022102368 A1 WO2022102368 A1 WO 2022102368A1
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- resin
- meth
- monomer
- pigment
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- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 description 1
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- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 1
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- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
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- 235000012739 red 2G Nutrition 0.000 description 1
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- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000000467 secondary amino group Chemical group [H]N([*:1])[*:2] 0.000 description 1
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- 239000010703 silicon Substances 0.000 description 1
- 150000003384 small molecules Chemical group 0.000 description 1
- COEZWFYORILMOM-UHFFFAOYSA-M sodium 4-[(2,4-dihydroxyphenyl)diazenyl]benzenesulfonate Chemical compound [Na+].OC1=CC(O)=CC=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 COEZWFYORILMOM-UHFFFAOYSA-M 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- AXMCIYLNKNGNOT-UHFFFAOYSA-M sodium;3-[[4-[(4-dimethylazaniumylidenecyclohexa-2,5-dien-1-ylidene)-[4-[ethyl-[(3-sulfonatophenyl)methyl]amino]phenyl]methyl]-n-ethylanilino]methyl]benzenesulfonate Chemical compound [Na+].C=1C=C(C(=C2C=CC(C=C2)=[N+](C)C)C=2C=CC(=CC=2)N(CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C=CC=1N(CC)CC1=CC=CC(S([O-])(=O)=O)=C1 AXMCIYLNKNGNOT-UHFFFAOYSA-M 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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- 125000006850 spacer group Chemical group 0.000 description 1
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- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 1
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- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical class CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 125000002221 trityl group Chemical group [H]C1=C([H])C([H])=C([H])C([H])=C1C([*])(C1=C(C(=C(C(=C1[H])[H])[H])[H])[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- JOHIXGUTSXXADV-UHFFFAOYSA-N undec-2-ene Chemical compound CCCCCCCCC=CC JOHIXGUTSXXADV-UHFFFAOYSA-N 0.000 description 1
- SDTYFWAQLSIEBH-UHFFFAOYSA-N undec-3-ene Chemical compound CCCCCCCC=CCC SDTYFWAQLSIEBH-UHFFFAOYSA-N 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 150000007964 xanthones Chemical class 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 239000001052 yellow pigment Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- C08F220/52—Amides or imides
-
- 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
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/04—Polymers provided for in subclasses C08C or C08F
-
- 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
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/08—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated side groups
- C08F290/12—Polymers provided for in subclasses C08C or C08F
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
- C08L101/02—Compositions of unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or 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 of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B47/00—Porphines; Azaporphines
- C09B47/04—Phthalocyanines abbreviation: Pc
- C09B47/08—Preparation from other phthalocyanine compounds, e.g. cobaltphthalocyanineamine complex
- C09B47/10—Obtaining compounds having halogen atoms directly bound to the phthalocyanine skeleton
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C3/00—Treatment in general of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties
- C09C3/10—Treatment with macromolecular organic compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D17/00—Pigment pastes, e.g. for mixing in paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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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
- 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
- G03F7/038—Macromolecular compounds which are rendered insoluble or differentially wettable
-
- 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
Definitions
- the present invention relates to a pigment dispersion composition and a photosensitive coloring composition.
- photosensitive resin compositions that can be cured by active energy rays such as ultraviolet rays and electron beams are widely used in various fields such as coatings, printing, paints, and adhesives.
- the photosensitive resin composition is used as a solder resist, a resist for a color filter, and the like in the field of electronic materials such as printed wiring boards.
- the color filter is generally formed on a transparent substrate such as a glass substrate, red, green and blue pixels formed on the transparent substrate, a black matrix formed at the boundary of the pixels, and the pixels and the black matrix. It is composed of a protective film.
- a color filter having such a configuration is usually manufactured by sequentially forming a coloring pattern such as a black matrix or a pixel or a pattern such as a protective film on a transparent substrate.
- Various methods have been proposed as methods for forming various patterns.
- the pigment / dye dispersion method produced by a photolithography method in which a photosensitive resin composition is used as a resist and repeated coating, exposure, development and baking is excellent in durability and coloring with few defects such as pinholes. It is the current mainstream to give patterns.
- the photosensitive resin composition used in the photolithographic method contains an alkali-soluble resin, a reactive diluent, a photopolymerization initiator, a pigment / dye dispersion composition (also referred to as a colorant), and a solvent.
- the pigment / dye dispersion method has the above advantages, it repeatedly forms black matrix, red, green, and blue patterns, so it has heat resistance that can withstand high baking temperatures and is exposed during the manufacturing process. Resistance to various solvents is required.
- the photosensitive resin composition used in the photolithography method is required to have negative resist characteristics.
- Patent Document 1 discloses using a polymer (A) having an acid group and a crosslinked cyclic hydrocarbon group having 10 to 20 carbon atoms.
- displays such as liquid crystals and organic EL are required to have high image quality and high definition, and color filters are also required to be designed to achieve high brightness and expansion of color reproduction range.
- dyes are used instead of pigments as colorants for colorants in order to increase the brightness and expand the color reproduction range. Due to the limitation, the coloring material often contains a pigment.
- the finely divided pigment particles tend to aggregate, and there is a problem that the pigment dispersibility and the storage stability of the pigment dispersion composition tend to decrease.
- the concentration of the coloring material increases, the concentration of the dispersant and the concentration of the binder resin decrease, so that the pigment dispersibility and the pigment dispersion composition can be preserved with a smaller amount of the dispersant, the binder resin, and other compositions. It has been required to exhibit various resist properties such as stability, heat resistance, solvent resistance, and pattern adhesion.
- the present invention has been made to solve the above-mentioned problems, and even when the concentration of the dispersant or the binder resin is reduced by increasing the concentration of the pigment, sufficient pigment dispersibility and storage stability are obtained. It is an object of the present invention to provide a pigment dispersion composition obtained by the present invention. Further, a photosensitive coloring composition capable of obtaining a resin cured film having excellent developability, heat resistance, solvent resistance, and pattern adhesion by using the pigment dispersion composition, and a color filter having the cured product thereof. It is an object of the present invention to provide an image display element provided with this.
- the present invention includes the following aspects.
- Binder resin (A-1) and Pigment (B) and Polymer dispersant (C) and Solvent (D-1) and Contains The binder resin (A-1) is at least one resin selected from the group consisting of the resin (A-1a) and the resin (A-1b).
- the resin (A-1a) has a polymerizable monomer (m-1a) having a crosslinked cyclic hydrocarbon group having 10 to 20 carbon atoms (excluding the polymerizable monomer (m-1b)) and the following formula (excluding the polymerizable monomer (m-1b)).
- the resin (A-1b) is a monomer in which the ethylenically unsaturated group-containing compound (m-4) has an epoxy group or an oxetanyl group in the resin (A-1a), and is generated by the ring-opening addition thereof. It is a resin to which one or more selected from an ethylenically unsaturated group-containing compound (m-5) having an isocyanato group as a part of a hydroxy group and a polybasic acid anhydride (m-6) are added. Pigment dispersion composition.
- R1 and R2 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and R1 and R2 may be bonded to form a cyclic structure.
- R4 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms which may be linear or branched.
- the polymer dispersant (C) is At least one monomer selected from the group consisting of a monomer having a tertiary amino group and an ethylenically unsaturated group, and a monomer having a quaternary ammonium cation group and an ethylenically unsaturated group.
- Composition [6] The total of the polymerizable monomer (m-1), the acrylic acid (m-2), and the aromatic-containing polymerizable monomer (m-3) of the copolymer (P) was set to 100 mol%.
- the binder resin (A-1) contains 10 to 50 parts by mass
- the pigment dispersion composition according to any one of [1] to [7] which contains 10 to 80 parts by mass of the polymer dispersant (C).
- the pigment dispersion composition according to any one of [1] to [8] and Binder resin (A-2) and Reactive diluent (E) and A photosensitive coloring composition comprising a photopolymerization initiator (F).
- a total of 50 to 280 parts by mass of the binder resin (A-1) and (A-2) is contained.
- the polymer dispersant (C) is contained in an amount of 10 to 80 parts by mass, and the polymer dispersant (C) is contained in an amount of 10 to 80 parts by mass. 40 to 200 parts by mass of the reactive diluent (E) is contained.
- the photosensitive coloring composition according to [9] which contains 0.1 to 10 parts by mass of the photopolymerization initiator (F).
- the present invention it is possible to provide a pigment dispersion composition having good pigment dispersibility and storage stability. Further, by using the pigment dispersion composition, it is possible to provide a photosensitive coloring composition capable of obtaining a resin cured film having excellent developability, heat resistance, solvent resistance and pattern adhesion. Further, it is possible to provide a color filter having a cured product of the photosensitive coloring composition and an image display element provided with the color filter.
- (meth) acryloyloxy group represents one or more selected from a methacryloyloxy group and an acryloyloxy group. The same applies to "(meth) acrylic acid” and "(meth) acrylate”.
- the pigment dispersion composition of the present embodiment contains a binder resin (A-1), a pigment (B), a polymer dispersant (C), and a solvent (D-1).
- the binder resin (A-1) is at least one resin selected from the group consisting of the following resins (A-1a) and resin (A-1b).
- the resin (A-1a) is a resin in which an ethylenically unsaturated group-containing compound (m-4) is added to a part of the carboxy group of the copolymer (P).
- the ethylenically unsaturated group-containing compound (m-4) has a group reactive with a carboxy group.
- the copolymer (P) includes a polymerizable monomer (m-1a) having a crosslinked cyclic hydrocarbon group having 10 to 20 carbon atoms (excluding the polymerizable monomer (m-1b)) and the following formula (excluding the polymerizable monomer (m-1b)). At least one polymerizable monomer (m-1) selected from the group consisting of the polymerizable monomer (m-1b) represented by 1), an acrylic acid (m-2), and an aromatic ring-containing polymerizable monomer (m). -3) It is a copolymer of a monomer (M) containing and.
- the resin (A-1b) is a resin obtained by adding one or more selected from an ethylenically unsaturated group-containing compound (m-5) and a polybasic acid anhydride (m-6) to the resin (A-1a). be.
- the ethylenically unsaturated group-containing compound (m-5) has an isocyanato group.
- the resin (A-1a) is a resin in which the ethylenically unsaturated group-containing compound (m-4) having an epoxy group or an oxetanyl group is added to a part of the carboxy group of the copolymer (P). ..
- the resin (A-1a) has a plurality of hydroxy groups generated by their ring-opening addition.
- One form of the binder resin (A-1) of the present embodiment is an ethylenically unsaturated group-containing compound (m) having a reactive group as a part of the carboxy group of the copolymer (P) having a carboxy group. -4) is the resin (A-1a) added.
- the copolymer (P) includes a polymerizable monomer (m-1a) having a crosslinked cyclic hydrocarbon group having 10 to 20 carbon atoms (excluding the polymerizable monomer (m-1b)) and the following formula (excluding the polymerizable monomer (m-1b)). At least one polymerizable monomer (m-1) selected from the group consisting of the polymerizable monomer (m-1b) represented by 1), an acrylic acid (m-2), and an aromatic ring-containing polymerizable monomer (m). -3) It is a copolymer of a monomer (M) containing and.
- R1 and R2 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 20 carbon atoms, and R1 and R2 may be bonded to form a cyclic structure.
- R4 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms which may be linear or branched.
- binder resin (A-1) of the present embodiment are an ethylenically unsaturated group-containing compound (m-5) having an isocyanato group and a polybase, in addition to the above resin (A-1a). It is a resin (A-1b) to which one or more selected from acid anhydride (m-6) is added.
- the copolymer (P) used in the present embodiment is a polymerizable monomer (m-1a) having a crosslinked cyclic hydrocarbon group having 10 to 20 carbon atoms and the following formula (1) as the constituent monomer (M). At least one polymerizable monomer (m-1) selected from the group consisting of the indicated polymerizable monomer (m-1b), an acrylic acid (m-2), and an aromatic ring-containing polymerizable monomer (m-3). And contains.
- the monomer (m-1) is at least one selected from the monomer (m-1a) and the monomer (m-1b).
- the monomer (m-1a) has a crosslinked cyclic hydrocarbon group having 10 to 20 carbon atoms.
- the crosslinked cyclic hydrocarbon preferably has a structure represented by the following formula (3) or (4). Examples of bridged cyclic hydrocarbons include adamantane, norbornane.
- the cross-linked cyclic hydrocarbon group refers to a group corresponding to the rest of the structure excluding some hydrogen atoms. Further, the monomer (m-1a) does not contain the monomer (m-1b) described later.
- a and B each independently represent an alkylene group (including a cyclic type) having 1 to 10 carbon atoms which may be linear or branched. A and B may be the same or different. The branches of A and B may be bonded to each other to form a cyclic structure.
- R5 represents a hydrogen atom or a methyl group.
- A', B'and D each independently represent an alkylene group (including a cyclic type) having 1 to 10 carbon atoms which may be linear or branched.
- A', B'and D may be the same or different.
- the branches of A', B'and D may be bonded to each other to form a cyclic structure.
- R6 represents a hydrogen atom or a methyl group.
- a (meth) acrylate having a crosslinked cyclic hydrocarbon group having 10 to 20 carbon atoms is preferable, and an adamantyl (meth) acrylate or a structure represented by the following formula (5) is obtained (meth). ) Acrylate is more preferred.
- R7 to R9 independently represent a hydrogen atom or a methyl group.
- R10 and R11 may represent a hydrogen atom or a methyl group, or may be bonded to form a saturated or unsaturated ring.
- the ring is preferably a 5-membered ring or a 6-membered ring. * Represents a bond linked to a (meth) acryloyloxy group.
- (meth) acrylate having the structure represented by the above formula (5) examples include dicyclopentenyl (meth) acrylate, dicyclopentanyl (meth) acrylate, isobornyl (meth) acrylate and the like. These may be used alone or in combination of two or more.
- the monomer (m-1b) is a polymerizable monomer represented by the above formula (1).
- examples of the substituent in the hydrocarbon group having 1 to 20 carbon atoms which may have a substituent represented by R1 and R2 include an alkoxy group and an aryl group.
- Specific examples of the hydrocarbon group having 1 to 20 carbon atoms which may have a substituent include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group and a t-butyl group.
- An alicyclic group such as a group, an adamantyl group or a 2-methyl-2-adamantyl group; an alkyl group substituted with an alkoxy group such as a 1-methoxyethyl group or a 1-ethoxyethyl group; an aryl group such as a phenylaralkyl group.
- Examples thereof include a substituted alkyl group.
- Specific examples of the linear or branched hydrocarbon group having 1 to 4 carbon atoms represented by R3 and R4 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group and an n-butyl group. Examples thereof include an isobutyl group and a t-butyl group.
- the monomer (m-1b) include norbornene (bicyclo [2.2.1] hept-2-ene), 5-methylbicyclo [2.2.1] hept-2-ene, and tetracyclo [4. 4.0.1. 2,5 . 17 and 10 ]
- the monomer (m-1a) and / or the monomer (m-1b) By containing the monomer (m-1a) and / or the monomer (m-1b), it is possible to provide a color filter having a high surface hardness and suppressing bleed-out of a colorant. At the same time, it has high heat-resistant decomposition and high heat-resistant yellowing, and can reduce the color change of the color filter after baking.
- the monomer (m-1a) and the monomer (m-1b) either one may be used alone or both may be used.
- adamantyl (meth) acrylate or (meth) acrylate having the structure represented by the above formula (5) is preferable, and dicyclopentanyl (meth) acrylate is more preferable. preferable.
- the copolymer (P) of the present embodiment contains a monomer (m-2) as a constituent monomer (M).
- the monomer (m-2) is acrylic acid. Since the binder resin (A-1) has a carboxy group derived from the monomer (m-2), the affinity with the alkaline developer is enhanced, and a colored photosensitive composition having excellent developability can be obtained. It is possible to provide a high-definition color filter having dimensional accuracy.
- the monomer (m-2) as the copolymer (P) the dispersity and storage stability of the pigment are higher than those of other acid group-containing polymerizable monomers having a carboxy group, a sulfo group, a phospho group, etc.
- an excellent pigment dispersion composition can be obtained. Therefore, it can be expected that the brightness and transmittance of the color filter will be improved as the pigment dispersity is improved. Further, as the pigment dispersity is improved, the spawning of light by the pigment particles at the time of exposure can be reduced, which also contributes to the improvement of the developability of the photosensitive coloring composition.
- an acid group-containing polymerizable monomer other than the monomer (m-2) can be used in combination as the constituent monomer as long as the effect of the present invention is not impaired. Therefore, it is preferable not to use it.
- the monomer (m-3) is other than the monomer (m-1a), the monomer (m-1b), and the monomer (m-2), and is not particularly limited as long as it is a polymerizable monomer containing an aromatic ring.
- the affinity with the pigment (B) is improved, and a pigment dispersion composition having excellent pigment dispersibility and storage stability can be obtained.
- the monomer (m-3) include benzyl (meth) acrylate, phenyl (meth) acrylate, triphenylmethyl (meth) acrylate, cumyl (meth) acrylate, rosin (meth) acrylate, and naphthalene (meth) acrylate.
- Anthracene (meth) acrylate, 4-hydroxyphenyl (meth) acrylate, styrene, ⁇ -, o-, m-, p-alkyl, nitro, cyano, amide derivative, N-phenylmaleimide, N- (4-hydroxy) Phenyl) Maleimide and the like can be mentioned.
- benzyl (meth) acrylate phenyl (meth) acrylate, styrene, and ⁇ -, o-, m-, and p-alkyl derivatives of styrene.
- benzyl (meth) acrylate phenyl (meth) acrylate
- styrene styrene
- ⁇ -, o-, m-, and p-alkyl derivatives of styrene benzyl (meth) acrylate, phenyl (meth) acrylate, styrene, and ⁇ -, o-, m-, and p-alkyl derivatives of styrene.
- the mixing ratio of each monomer (molar ratio of each monomer) in the copolymer (P) of the present embodiment is not particularly limited, but the monomers (m-1), (m-2), (m-3).
- the ratio of the monomer (m-1) is preferably 1 to 40 mol%, more preferably 2 to 20 mol%, still more preferably 5 to 15 mol%.
- the ratio of the monomer (m-1a) and / or (m-1b) in the monomer (m-1) there is no limitation on the ratio of the monomer (m-1a) and / or (m-1b) in the monomer (m-1), and any blending ratio can be taken.
- the blending ratio of the monomer (m-1) is 1 mol% or more, the desired characteristics derived from the monomer (m-1) are obtained, and when the blending ratio is 40 mol% or less, other polymerizable monomers are used. It can be sufficiently blended and compatible with other characteristics.
- the ratio of the monomers (m-2) is preferably 10 to 90 mol%, more preferably. It is 20 to 85 mol%, more preferably 30 to 70 mol%.
- the compounding ratio of the monomer (m-2) is 10 mol% or more, good developability of the pigment dispersion composition can be obtained, and a sufficient amount of ethylenically unsaturated groups are added to the side chain of the copolymer (P). Can be introduced.
- this blending ratio is 90 mol% or less, other monomers can be sufficiently blended, and compatibility with other properties can be achieved.
- the ratio of the monomers (m-3) is preferably 9 to 70 mol%, more preferably. It is 13 to 60 mol%, more preferably 20 to 55 mol%.
- this blending ratio is 9 mol% or more, the desired characteristics derived from the monomer containing an aromatic can be obtained, and when this blending ratio is 70 mol% or less, other monomers can be sufficiently blended. It is possible to achieve both the characteristics of.
- the copolymer (P) of the present embodiment is a constituent unit derived from other polymerizable monomers as long as it does not interfere with the desired properties derived from the monomers (m-1), (m-2), and (m-3). May include. That is, other polymerizable monomers that can be copolymerized may be contained in addition to the monomers (m-1a), (m-1b), (m-2), and (m-3).
- the other polymerizable monomer is generally a radically polymerizable compound having an ethylenically unsaturated group, and specific examples thereof include dienes such as butadiene; methyl (meth) acrylate, ethyl (meth) acrylate, and n-propyl (meth).
- (meth) acrylic acid esters such as compounds; (meth) acrylic acid amide, (meth) acrylic acid N, N-dimethylamide, (meth) acrylic acid N, N-diethylamide, (meth) acrylic acid N, (Meta) Acrylic Acid Amides such as N-Dipropylamide, (Meta) Acrylic Acid N, N-Di-Iso-propylamide, (Meta) Acrylic Acid Anthracenylamide; (Meta) Acrylic Acid Anilide, (Meta) Vinyl compounds such as acryloylnitrile, acrolein, vinyl chloride, vinylidene chloride, vinyl fluoride, vinylidene fluoride, N-vinylpyrrolidone, vinylpyridine, vinyl acetate, vinyltoluene; maleimides such as N-cyclohexylmaleimide and N-laurylmaleimide.
- Examples thereof include unsaturated dicarboxylic acid diesters such as diethyl citraconate, diethyl maleate, diethyl fumarate, and diethyl itaconate. These may be used alone or in combination of two or more, if necessary.
- Ratio of other polymerizable monomers The ratio of the other polymerizable monomers in the copolymer (P) of the present embodiment was 100 mol% in total of the monomers (m-1), (m-2), (m-3), and other polymerizable monomers. In the case, it is preferably 10 mol% or less, more preferably 5 mol% or less.
- the copolymer (P) contains an ethylenically unsaturated group-containing compound (m-4) having a group reactive with a carboxy group, and optionally an ethylenically unsaturated group-containing compound having an isocyanato group.
- the binder resin (A-1) to which one or more selected from (m-5) and the polybasic acid anhydride (m-6) are added will be described.
- "Ethyloxy unsaturated group-containing compound having a group reactive with a carboxy group (m-4)” "Ethionic unsaturated group-containing compound having an isocyanato group (m-5)", and “polybasic acid anhydride”.
- object (m-6) may refer to "compound (m-4)", “compound (m-5)", and “compound (m-6)", respectively.
- Compound (m-4) has a group reactive with a carboxy group and an ethylenically unsaturated group.
- the group having reactivity with the carboxy group include an epoxy group, an oxetanyl group, an isocyanato group, a hydroxyl group and an amino group.
- the copolymer (P) is formed by adding a carboxy group derived from the monomer (m-2) of the copolymer (P) and a group having a reactivity with the carboxy group of the compound (m-4). An ethylenically unsaturated group can be introduced into the side chain of.
- the binder resin (A-1) has an ethylenically unsaturated group derived from the compound (m-4), bleed-out of the pigment (B) is suppressed, and heat resistance, solvent resistance, pattern adhesion, and developability are suppressed. It is possible to provide a pigment dispersion composition that exhibits excellent resist properties such as.
- the compound (m-4) include glycidyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate glycidyl ether, 3,4-epoxycyclohexylmethyl (meth) acrylate, and (3-ethyloxetane-3-yl).
- glycidyl (meth) acrylate 4-hydroxybutyl (meth) acrylate glycidyl ether, 3,4-epoxycyclohexylmethyl (meth) acrylate, and (3-ethyloxetane-3-yl) methyl (meth) acrylate are more suitable.
- glycidyl (meth) acrylates are even more preferred.
- Compound (m-5) When a compound having an epoxy group or an oxetanyl group is used as the compound (m-4), (m-5) may be further used if necessary.
- the compound (m-5) is a monomer having no carboxy group, epoxy group or oxetanyl group, and having an isocyanato group and an ethylenically unsaturated group.
- the resin (A-1b) is obtained by adding the compound (m-5) to a part of the plurality of hydroxy groups of the resin (A-1a). As a result, an ethylenically unsaturated group is further introduced into the resin (A-1a).
- the resin (A-1b) By using the resin (A-1b), various resist properties such as heat resistance, solvent resistance, pattern adhesion, and developability can be further enhanced.
- an epoxy group and an oxetanyl group of the compound (m-4) are ring-opened and added to a carboxy group derived from the monomer (m-2) of the copolymer (P). It was born from the above.
- the resin (A-1a) is one form of the binder resin (A-1), and the resin (A-1b) is another form of the binder resin (A-1).
- the compound (m-5) include 2-isocyanatoethyl (meth) acrylate, 2-isocyanatopropyl (meth) acrylate, 3-isocyanatopropyl (meth) acrylate, and 2-isocyanato-1-methyl.
- Ethyl (meth) acrylate, 2-isocyanato-1,1-dimethylethyl (meth) acrylate, 4-isocyanatocyclohexyl (meth) acrylate, 1,1- (bisacryloyloxymethyl) ethyl isocyanate and the like can be mentioned. These may be used alone or may use two or more kinds. Of these, 2-isocyanatoethyl (meth) acrylate is preferable from the viewpoint of availability.
- Compound (m-6) is a polybasic acid anhydride. When a compound having an epoxy group or an oxetanyl group is used as the compound (m-4), a compound (m-6) may be further used if necessary.
- the compound (m-6) is not particularly limited as long as it has an acid anhydride structure, but a compound (m-6) having a ring structure in which no by-product is generated after the reaction is preferable.
- the resin (A-1b) can be obtained by adding the compound (m-6) to a part of the plurality of hydroxy groups of the resin (A-1a). As a result, a carboxy group is introduced into the resin (A-1a).
- the resin (A-1b) By using the resin (A-1b), it contributes to the improvement of developability as a photosensitive coloring composition.
- an epoxy group and an oxetanyl group of the compound (m-4) are ring-opened and added to a carboxy group derived from the monomer (m-2) of the copolymer (P). It was born from the above.
- the resin (A-1a) is one form of the binder resin (A-1), and the resin (A-1b) is another form of the binder resin (A-1).
- the compound (m-6) include 1,2,3,6-tetrahydrophthalic anhydride, hexahydrophthalic anhydride, 4-methylhexahydrophthalic anhydride, and bicyclo [2.2.1] heptane-.
- examples thereof include 2,3-dicarboxylic acid anhydride, methylbicyclo [2.2.1] heptane-2,3-dicarboxylic acid anhydride, phthalic anhydride, octenyl succinic acid anhydride and the like. These may be used alone, or two or more kinds may be used. Of these, succinic anhydride is preferable from the viewpoint of availability.
- the introduction ratio of the compound (m-4) to the copolymer (P) is preferably 5 to 90 mol% when the total of the monomers (m-1) to (m-3) is 100 mol%. , More preferably 10 to 70 mol%, still more preferably 10 to 40 mol%. Further, when acrylic acid (m-2) is 100 mol%, it is preferably 5 to 90 mol%, more preferably 10 to 70 mol%, and further preferably 20 to 50 mol%.
- Total introduction ratio of compound (m-5) and compound (m-6) Regarding the total introduction ratio of the compound (m-5) and the compound (m-6) to the copolymer (P), when the total of the monomers (m-1) to (m-3) is 100 mol%. In addition, it is preferably 3 to 70 mol%, more preferably 5 to 50 mol%, and further preferably 5 to 25 mol%. Further, when the compound (m-4) is 100 mol%, it is preferably 5 to 90 mol%, more preferably 20 to 80 mol%, and further preferably 40 to 70 mol%.
- the introduction ratio when the compound (m-5) and the compound (m-6) are used in combination is not limited, and an arbitrary introduction ratio can be selected according to the desired performance. That is, if the heat resistance, solvent resistance, and pattern adhesion are to be improved, the proportion of the compound (m-5) may be increased, and if the developability is to be improved, the proportion of the compound (m-6) may be increased. good. If it is desired to improve both performances, the compound (m-5) and the compound (m-6) may be increased at the same ratio. By adjusting the introduction ratios of (m-5) and compound (m-6) as described above, desired performance can be obtained with added value.
- the acid value of the binder resin (A-1) in the present embodiment contains a carboxylic acid derived from acrylic acid (m-2). , 0 mgKOH / g or more is not particularly limited, but is preferably 10 to 400 mgKOH / g, more preferably 30 to 300 mgKOH / g, and most preferably 50 to 200 mgKOH / g.
- the acid value of the binder resin (A-1) is 10 mgKOH / g or more, the developability as a photosensitive coloring composition is good.
- the acid value of the binder resin (A-1) is 400 mgKOH / g or less, a uniform composition can be obtained without impairing the affinity with other components contained in the pigment dispersion composition and the photosensitive coloring composition. Can be provided.
- the molecular weight (weight average molecular weight in terms of polystyrene) of the binder resin (A-1) in the present embodiment is not particularly limited, but is preferably 1000 to 50,000, more preferably 3000 to 40,000, and most preferably 5000 to 30,000.
- the molecular weight of the binder resin (A-1) is 1000 or more, excellent heat resistance, solvent resistance, and pattern adhesion can be ensured.
- the molecular weight of the binder resin (A-1) is 50,000 or less, the molecular weight and viscosity at the time of producing the binder resin (A-1) can be controlled in an appropriate range, and the pigment dispersion composition is practical. And a photosensitive coloring composition can be provided.
- the ethylenically unsaturated group equivalent of the binder resin (A-1) in the present embodiment is not particularly limited as long as the side chain of the copolymer (P) has an ethylenically unsaturated group, but is preferably 200. It is about 5000 g / mol, more preferably 300 to 2500 g / mol, and most preferably 500 to 2000 g / mol.
- the ethylenically unsaturated group equivalent of the binder resin (A-1) is 5000 g / mol or less, excellent heat resistance, solvent resistance, and pattern adhesion can be ensured.
- the ethylenically unsaturated group equivalent at the time of producing the binder resin (A-1) is 200 g / mol or more, the stability at the time of producing the binder resin (A-1) can be ensured and the pigment dispersion composition is practical. And a photosensitive coloring composition can be provided.
- the copolymer (P), which is a precursor of the binder resin (A-1), is obtained by carrying out a copolymerization reaction according to a radical polymerization method known in the art.
- the monomer used for copolymerization may be dissolved in a solvent, a polymerization initiator may be added to the solution, and the reaction may be carried out at 50 to 130 ° C. for 1 to 20 hours. Further, the monomer used for the copolymerization and the polymerization initiator may be reacted with the solvent adjusted to 50 to 130 ° C. while dropping.
- the solvent that can be used for this copolymerization reaction is not particularly limited as long as it is inert to radical polymerization, and a commonly used organic solvent can be used.
- a commonly used organic solvent can be used.
- Specific examples thereof include glycol ether solvents such as propylene glycol monomethyl ether and propylene glycol monomethyl ether acetate; aromatic solvents such as toluene and xylene, and ester solvents such as ethyl acetate, isopropyl acetate and ethyl lactate. These can be used alone or in combination of two or more. In particular, among these, the use of glycol ether solvents is preferable.
- the amount of the solvent used in this copolymerization reaction is not particularly limited, but is generally 30 to 1000 parts by mass, preferably 50 to 800 parts by mass when the total amount of the monomers used in the copolymerization is 100 parts by mass.
- the amount of the solvent used is set to 1000 parts by mass or less, the decrease in the molecular weight of the copolymer (P) is suppressed by the chain transfer action, and the viscosity of the copolymer (P) is controlled within an appropriate range. be able to.
- 30 parts by mass or more of the solvent it is possible to prevent an abnormal polymerization reaction, stably carry out the polymerization reaction, and prevent coloring and gelation of the copolymer (P). You can also do it.
- the polymerization initiator that can be used in this copolymerization reaction is not particularly limited as long as it can initiate radical polymerization, and a commonly used organic peroxide catalyst or azo compound is used. Can be done. Specifically, azobisisobutyronitrile, azobisisovaleronitrile, 2,2'-azobis (2,4-dimethylvaleronitrile), azobis (2-methylpropionic acid) dimethyl, benzoyl peroxide, dicumyl.
- Peroxide diisopropyl peroxide, di-t-butyl peroxide, t-butylperoxybenzoate, t-hexylperoxybenzoate, t-butylperoxy-2-ethylhexanoate, t-hexylperoxy-2- Ethylhexanoate, 1,1,3,3-tetramethylbutylperoxy-2-ethylhexanoate and the like can be mentioned. These can be used alone or in combination of two or more, and it is desirable to select a radical polymerization initiator having an appropriate half-life depending on the polymerization temperature.
- the amount of the polymerization initiator used in this copolymerization reaction is not particularly limited, but is generally 0.5 to 20 parts by mass, preferably 1.0 to 20 parts by mass when the total amount of the monomers used in the copolymerization is 100 parts by mass. It is 10 parts by mass.
- a known addition reaction can be used as a method for adding the compound (m-4) to a part of the carboxy group of the copolymer (P).
- the compound (m-4) is added, and an addition reaction or dehydration is performed under the conditions of room temperature to 150 ° C., preferably 50 to 120 ° C. React.
- the polymerization inhibitor is added in order to prevent a side reaction of the introduced unsaturated group.
- the polymerization inhibitor include hydroquinone, methylhydroquinone, hydroquinone monomethyl ether, dibutylhydroxytoluene and the like.
- the catalyst include a tertiary amino group such as triethylamine, a quaternary ammonium salt such as triethylbenzylammonium chloride, a phosphorus compound such as triphenylphosphine, and an organic metal compound such as chromium and tin. ..
- the epoxy group and oxetanyl group of the compound (m-4) are ring-opened and added to a part of the carboxy group of the copolymer (P) to generate a plurality of hydroxy groups.
- the method of the addition reaction is as follows. After the addition reaction of the compound (m-4) described above, the compound (m-5) and the compound (m-6) may be added, and if necessary, the reaction temperature may be adjusted or the catalyst may be used. You may add it.
- the pigment (B) in the present embodiment is not particularly limited as long as it can be uniformly dispersed in the composition to form the pixels of the color filter.
- Pigments of each color such as pigments of the three primary colors of light such as red, green and blue, pigments such as yellow, orange and purple that can be used as complementary colors, and pigments such as black and brown used in the black matrix can be used. can.
- the chemical structure of the pigment (B) includes isoindoleinone, isoindoline, azomethin, anthraquinone, antron, xanthene, diketopyrrolopyrrole, perylene, perinone, quinacridone, indigoid, dioxazine, indigoid, phthalocyanine, anthocyanine, and azo. All organic pigments such as carbon black, titanium black, and inorganic pigments such as titanium dioxide can be mentioned.
- the pigment (B) in the present embodiment preferably contains a green pigment having a halogenated phthalocyanine skeleton represented by the following formula (6).
- M represents a divalent or tetravalent metal atom. From the viewpoint of color reproducibility, zinc or copper is preferable, and zinc is particularly preferable.
- X represents any one of a hydrogen atom, a chlorine atom and a bromine atom, and contains at least one chlorine atom or a bromine atom.
- the addition ratio of chlorine atom and bromine atom changes according to the brightness and color reproducibility. The more chlorine atom and less bromine atom, the higher the brightness, and conversely, the more bromine atom and less chlorine atom, the better the color reproducibility tends to be. be.
- the chlorine atom is preferably 1 or more and 10 or less, and more preferably 1.5 or more and 8 or less.
- the number of bromine atoms is preferably 5 or more and 15 or less, and more preferably 7 or more and 14 or less.
- a pigment dispersion composition having excellent pigment dispersibility and storage stability can be obtained, and the pigment has high brightness and color. It is possible to provide a color filter having a wide reproduction range. At the same time, heat resistance, solvent resistance, and pattern adhesion of the colored pattern can be imparted.
- halogenated phthalocyanine pigment a commercially available product may be used, or the pigment may be prepared by itself.
- a commercially available product C.I. I. Pigment Green 7, 36, 58, 59, etc., among which C.I. I. The use of Pigment Greens 58 and 59 is preferred.
- a known manufacturing method For example, a method of forming a phthalocyanine skeleton under a catalyst such as ammonium molybdate using phthalocyanine or phthalonitrile in which a part or all of hydrogen atoms of the aromatic ring is replaced with a halogen atom as a starting material, or phthalocyanine being chlorine gas or the like.
- a method of halogenating with bromine gas can be mentioned.
- a desired green pigment can be obtained by dry-grinding the crude pigment obtained by these methods in a pulverizer such as a ball mill or a vibration mill and treating with a known solvent salt milling method or the like.
- pigments may be used in combination. Not particularly limited. Pigments of each color such as pigments of the three primary colors of light such as red, green and blue, pigments such as yellow, orange and purple that can be used as complementary colors, and pigments such as black and brown used in the black matrix can be used. can.
- the chemical structures of these pigments include isoindoline, isoindoline, azomethin, anthraquinone, antron, xanthene, diketopyrrolopyrrole, perylene, perinone, quinacridone, indigoid, dioxazine, indigoid, anthocyanin, and azo.
- examples thereof include organic pigments and inorganic pigments such as carbon black, titanium black, and titanium dioxide.
- pigments 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; C.I. I. Pigment Orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, 71, 73 and the like; C.I. I.
- the colorant in the present embodiment not only the pigment (B) but also a dye may be used in combination.
- a dye when used in combination, higher brightness, a wider color reproduction range, and better developability can be expected as compared with the case where a pigment is used.
- the heat resistance is superior to that of a dye, and the color change after forming a coloring pattern is small.
- Dyes and pigments may be used in combination depending on the required performance and the target pixel color.
- the dye is an acid dye having an acidic group such as a carboxy group from the viewpoints of solubility in a solvent (D-1) and an alkaline developing solution described later, interaction with other components in the resin composition, heat resistance, and the like.
- Salts of acid dyes with nitrogen compounds, sulfonamides of acid dyes, etc. are preferably used.
- Specific examples of such dyes include acid alizarin violet N; acid black1, 2, 24, 48; acid blue1, 7, 9, 25, 29, 40, 45, 62, 70, 74, 80, 83, 90.
- azo-based, xanthene-based, anthraquinone-based or phthalocyanine-based acid dyes are preferable. These dyes may be used alone or in combination of two or more.
- the polymer dispersant (C) is not particularly limited as long as it can disperse the pigment (B). From the viewpoint of pigment dispersibility and storage stability, a polymer compound having at least one substituent selected from the group consisting of a tertiary amino group and a quaternary ammonium cation group is preferable.
- a polyamine obtained by homopolymerizing or copolymerizing a monomer having a tertiary amino group and an ethylenically unsaturated group, a monomer having a quaternary ammonium cation group and an ethylenically unsaturated group, or a polyammonium cation salt thereof.
- a polyamine (or polyammonium cationic salt) copolymerized with a monomer and another monomer having an ethylenically unsaturated group, or a polymer compound containing one or more primary and / or secondary amino groups is alkylated to form a tertiary amino.
- the polymer dispersant (C) is at least one monomer selected from the group consisting of a monomer having a tertiary amino group and an ethylenically unsaturated group and a monomer having a quaternary ammonium cation group and an ethylenically unsaturated group. It is preferably a block polymer of the above and another monomer having an ethylenically unsaturated group.
- Examples of the other monomer having an ethylenically unsaturated group include (meth) acrylates having an alkyl group, an aryl group, an aralkyl group, a cycloalkyl group, an alkylene glycol group and the like.
- a monomer having a tertiary amino group and an ethylenically unsaturated group and / or a monomer having a quaternary ammonium cation group and an ethylenically unsaturated group and a monomer having another ethylenically unsaturated group are block-polymerized.
- Polyamine or polyammonyl cationic salt
- C the polymer dispersant
- tertiary amino groups and / or quaternary ammonium cation groups are unevenly distributed in one terminal region, and the pigment (B) and Affinity is improved. Further, the other end region has an increased affinity with another pigment dispersion composition, specifically, a binder resin (A-1) or a solvent (D-1) described later, thereby improving pigment dispersibility.
- the storage stability of the pigment dispersion composition can be dramatically improved.
- a monomer having another ethylenically unsaturated group whose affinity with other pigment dispersion compositions can be enhanced it has an alkyl group, an aryl group, an aralkyl group, a cycloalkyl group, an alkylene glycol group and the like (meth).
- alkyl group an aryl group, an aralkyl group, a cycloalkyl group, an alkylene glycol group and the like (meth).
- examples include acrylate.
- the amine content of the polymer dispersant (C) can be quantitatively determined by measuring the amine value (value measured according to the standard shown in JIS K7237 or the like).
- the amine content of the polymer dispersant (C) of the present embodiment is not particularly limited, but is preferably 10 mgKOH / g to 200 mgKOH / g, and more preferably 30 mgKOH / g to 160 mgKOH / g.
- the amine value is 10 mgKOH / g or more, the affinity with the pigment (B) is enhanced, and sufficient pigment dispersibility and storage stability of the pigment dispersion composition can be obtained.
- the amine value is 200 mgKOH / g or less, the yellowing of the coloring pattern caused by the amine can be suppressed.
- the molecular weight (weight average molecular weight in terms of polystyrene) of the polymer dispersant (C) of the present embodiment is not particularly limited, but is preferably 1000 to 50,000, more preferably 3000 to 30,000. Further, the molecular weight distribution of the polymer dispersant (C) (value obtained by dividing the polystyrene-equivalent weight average molecular weight by the number average molecular weight) is preferably 1.0 to 2.0, more preferably 1.0 to 1.7. , More preferably in the range of 1.0 to 1.5.
- the viscosity of the pigment dispersion composition can be controlled within an appropriate range, and sufficient pigment dispersibility and storage stability of the pigment dispersion composition can be achieved. Sex is obtained.
- the narrower the molecular weight distribution the more effectively the pigment dispersibility and the storage stability of the pigment dispersion composition can be obtained with a smaller amount of dispersant.
- the polymer dispersant (C) may be a commercially available product or may be prepared by itself. Further, a commercially available product or a polyamine obtained by a known method for producing a block polymer may be arbitrarily modified to modify a functional group. When a commercially available product is used, examples of suitable polymer compounds include DISPERBYK series manufactured by Big Chemie, Solspers series manufactured by Lubrizol, and EFKA-PX series manufactured by BASF. These polymer dispersants (C) may be used alone or in combination of two or more, if necessary.
- the polyamine shown above is synthesized by using a known method for producing a block polymer.
- the monomer having a tertiary amino group and an ethylenically unsaturated group include dimethylaminoethyl (meth) acrylate, dimethylaminopropyl (meth) acrylate, dimethylaminobutyl (meth) acrylate, diethylaminoethyl (meth) acrylate, and the like.
- the monomers may be used alone or in combination of two or more.
- Specific examples of the monomer having a quaternary ammonium cation group and an ethylenically unsaturated group include an organic halogen compound salt of the monomer having a tertiary amino group.
- the organic halogen compound salt is not particularly limited, but from the viewpoint of availability, specific examples thereof include methyl chloride, ethyl chloride, propyl chloride, butyl chloride, benzyl chloride, ethyl alcohol chloride, methyl bromide, and ethyl bromide.
- examples of the monomer having an ethylenically unsaturated group whose affinity with other pigment dispersion compositions can be enhanced include an alkyl group, an aryl group, an aralkyl group, a cycloalkyl group, and a (poly) oxyalkylene skeleton.
- (Meta) acrylate having the above is mentioned, but there is no particular limitation as long as it does not impair the affinity with other pigment dispersion compositions.
- Specific examples include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, and t-butyl (meth) acrylate.
- Styrenes such as ethyl vinyl ether, n-propyl vinyl ether, isopropyl vinyl ether, n-butyl vinyl ether, or isobutyl vinyl ether; fatty acid vinyls such as vinyl acetate or vinyl propionate. These monomers may be used alone or in combination of two or more.
- the solvent (D-1) is not particularly limited as long as it is a solvent that does not react with each component contained in the pigment dispersion composition of the present embodiment or the photosensitive coloring composition and can dissolve or disperse them.
- the solvent (D-1) the same solvent as that used for producing the binder resin (A-1) and the polymer dispersant (C) can be used, and the solvent contained after the reaction can be used as it is. It can be used or added further. Further, when other components are added, they may coexist there.
- the solvent (D-1) examples include propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, dipropylene glycol monomethyl ether acetate, ethyl acetate, butyl acetate, isopropyl acetate, propylene glycol monomethyl ether, and dipropylene glycol monomethyl ether.
- examples thereof include tripropylene glycol monomethyl ether, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, ethylene glycol monoethyl ether acetate and diethylene glycol ethyl ether acetate.
- glycol ether solvents such as propylene glycol monomethyl ether and propylene glycol monomethyl ether acetate, which are preferably used in the production of color filters, are preferable.
- composition of Pigment Dispersion Composition The suitable blending amount of each component in the pigment dispersion composition of the present embodiment is as follows.
- the content of the binder resin (A-1) is preferably 10 to 50 parts by mass, more preferably 15 to 40 parts by mass, and further preferably 20 to 30 parts by mass with respect to 100 parts by mass of the pigment (B). ..
- the content of the binder resin (A-1) is 10 parts by mass or more, a photosensitive coloring composition having good developability can be obtained, and a cured resin film having excellent heat resistance, solvent resistance, and pattern adhesion can be obtained. Can be obtained.
- the content of the binder resin (A-1) is 50 parts by mass or less, the content of the pigment (B) can be sufficiently secured, and a cured resin film having excellent color reproducibility can be obtained.
- the content of the polymer dispersant (C) is preferably 10 to 50 parts by mass, more preferably 15 to 40 parts, still more preferably 20 to 30 parts with respect to 100 parts by mass of the pigment (B).
- the content of the polymer dispersant (C) is 10 parts by mass or more, a pigment dispersion composition having excellent pigment dispersibility and storage stability can be obtained.
- the content of the polymer dispersant (C) is 50 parts by mass or less, a sufficient content of the pigment (B) can be secured, and a photosensitive coloring composition having excellent color reproducibility can be obtained.
- the blending amount of the solvent (D-1) is preferably 100 to 900 parts, more preferably 120 to 600 parts, when the total amount of the components of the pigment dispersion composition excluding the solvent (D-1) is 100 parts by mass. , More preferably 150 to 400 parts.
- the content of the solvent (D-1) is within the above range, the pigment dispersion composition has an appropriate viscosity.
- the pigment dispersion composition of the present embodiment a predetermined amount of the binder resin (A-1), the pigment (B), the polymer dispersant (C), and the solvent (D-1) are weighed, and a known dispersion treatment step is used.
- the pigment (B) is made finer and dispersed.
- devices such as a paint shaker, a bead mill, a ball mill, a roll mill, a stone mill, a jet mill, a homogenizer, a planetary mixer, and a rotation / revolution mixer are often used.
- this dispersion treatment step if beads having a diameter of 0.01 to 10 mm are used, uniform miniaturization of the pigment (B) can be efficiently performed.
- the material of the beads is not limited, it is preferable to use glass beads or zirconia beads in consideration of hardness, contamination with the pigment dispersion composition, and the like. Appropriate conditions for the suitable time, temperature, bead diameter, and amount used for the dispersion treatment differ depending on the composition of the pigment dispersion composition, the size of the apparatus, and the like, and may be appropriately adjusted. Finally, it is preferable to filter the pigment dispersion composition with a glass filter or the like for the purpose of removing fine dust and coarse particles and aggregates of the pigment (B) from the pigment dispersion composition.
- the photosensitive coloring composition of the present embodiment contains the above pigment dispersion composition, a binder resin (A-2), a reactive diluent (E), and a photopolymerization initiator (F).
- the photosensitive coloring composition of the present embodiment may contain a solvent (D-2).
- the total binder resin (A) of the binder resin (A-1) and the binder resin (A-2) is 50 to 280 with respect to 100 parts by mass of the pigment (B). It is preferable to contain 40 to 200 parts by mass of the reactive diluent (E) and 0.1 to 10 parts by mass of the photopolymerization initiator (F).
- the solvent (D-2) the same solvent as the solvent (D-1) contained in the pigment dispersion composition may be used, or a different solvent may be added.
- the binder resin (A-2) used in the photosensitive coloring composition is not particularly limited, but is a resin such as a (meth) acrylic resin, an epoxy (meth) acrylic resin, or a vinyl ester resin generally used for a negative type resist.
- a resin containing an ethylenically unsaturated double bond such as a vinyl group and a (meth) acrylic group and a substituent contributing to alkali solubility such as a carboxylic acid, a phosphoric acid and a sulfonic acid is used. preferable.
- a (meth) acrylic resin having a (meth) acryloyloxy group and a carboxy group from the viewpoint of easily providing a resin having a wide range of properties.
- This resin may be a commercially available product or may be prepared by itself.
- the same binder resin (A-1) can be used.
- a solvent (D-2) may be added in order to appropriately control the molecular weight during the synthesis and to appropriately adjust the viscosity after the synthesis.
- the physical properties of the binder resin (A-2) are not particularly limited, but from the viewpoint of ease of production of the photosensitive coloring composition and compatibility with other compositions, the weight average molecular weight: 1000 to 50,000, solid.
- the acid value is preferably in the range of 10 to 200 mgKOH / mg, the double bond equivalent: 100 to 3000 g / mol, and the viscosity of the binder resin (A-2) solution: 0.1 to 1000 dPa ⁇ s.
- the total content of the binder resin (A) of the binder resin (A-1) and the binder resin (A-2) is preferably 50 to 280 parts by mass with respect to 100 parts by mass of the pigment (B). , 75 to 230 parts by mass, more preferably 100 to 200 parts by mass.
- the reactive diluent (E) is not particularly limited as long as it is a low molecular weight compound containing an ethylenically unsaturated double bond such as a vinyl group and a (meth) acryloyloxy group.
- the reactive diluent (E) include aromatic vinyl-based monomers such as styrene, ⁇ -methylstyrene, ⁇ -chloromethylstyrene, vinyltoluene, divinylbenzene, diallylphthalate, and diallylbenzenephosphonate; vinyl acetate, Polycarboxylic acid monomers such as vinyl adipine; methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, ⁇ -hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate , Ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, ethylene glycol di (meth) acrylate, trimerol propanedi (meth) acrylate, trimerol propanetri (me
- compounds having a plurality of (meth) acryloyloxy groups are preferable, and trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, and tris (hydroxyethyl) isocyanurate.
- the content of the reactive diluent (E) is preferably 40 to 200 parts by mass, more preferably 60 to 180 parts by mass, and 80 to 160 parts by mass with respect to 100 parts by mass of the pigment (B). It is more preferable to be a part.
- the photopolymerization initiator (F) is preferably a photoradical generator, and specific examples thereof include benzophens such as benzoin, benzoin methyl ether, and benzoin ethyl ether and their alkyl ethers; acetophenone, 2,2-dimethoxy-2-phenyl.
- Acetophenones such as acetophenone, 1,1-dichloroacetophenone, 4- (1-t-butyldioxy-1-methylethyl) acetophenone; 2-methylanthraquinone, 2-amylanthraquinone, 2-t-butylanthraquinone, 1-chloroanthraquinone And other anthraquinones; thioxanthones such as 2,4-dimethylthioxanthone, 2,4-diisopropylthioxanthone, 2-chlorothioxanthone; ketals such as acetophenone dimethyl ketal, benzyl dimethyl ketal; benzophenone, 4- (1-t-butyldioxy).
- Benzophenones such as -1-methylethyl) benzophenone, 3,3', 4,4'-tetrakis (t-butyldioxycarbonyl) benzophenone; 2-methyl-1- [4- (methylthio) phenyl] -2- Examples thereof include morpholino-propane-1-one; 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) butanone-1; acylphosphine oxides; and xanthones. These may be used alone or in combination of two or more.
- the content of the photopolymerization initiator (F) is 0.02 to 100 parts by mass with respect to 100 parts by mass of the total amount of the binder resin (A-1), the binder resin (A-2), and the reactive diluent (E). It is preferably 11 parts by mass, more preferably 0.24 to 6.7 parts by mass, and even more preferably 0.56 to 4.4 parts by mass.
- the photosensitive coloring composition of the present embodiment has known additives and fillers such as a photoacid generator, a photobase generator, a coupling agent, and a leveling agent in order to impart predetermined properties. Etc. may be blended. The blending amount of these components is not particularly limited as long as it does not impair the effects of the present invention.
- the photosensitive coloring composition of the present embodiment can be produced by mixing each of the above components using a known mixing device. For example, it can be produced by first preparing a pigment dispersion composition and then mixing a binder resin (A-2), a reactive diluent (E), a photopolymerization initiator (F), and the like in this order. Further, if necessary, a solvent (D-2) may be added in addition to the solvent (D-1) contained in the pigment dispersion composition. In that case, the solvent (D) contained in the photosensitive coloring composition contains the solvent (D-1) and the solvent (D-2). The solvent (D-2) may be the same as that of the solvent (D-1), or may be different from the solvent (D-1).
- the photosensitive coloring composition obtained as described above has sufficient pigment dispersibility and storage stability of the pigment dispersion composition even if the concentration of the colorant of the colorant is increased and the concentration of the dispersant or the binder resin is reduced. Therefore, high brightness can be achieved, and various resist characteristics such as heat resistance, solvent resistance, pattern adhesion, and developability can be exhibited. As a result, a highly reliable coloring pattern can be formed. That is, by using the photosensitive coloring composition, it is possible to provide a highly reliable color filter.
- the color filter of the present invention has a coloring pattern formed by using the above-mentioned photosensitive coloring composition.
- the color filter is usually composed of a substrate, RGB pixels formed on the substrate, a black matrix formed at the boundary of each pixel, and a protective film formed on the pixels and the black matrix.
- known configurations can be adopted except that the pixels and the black matrix (coloring pattern) are formed by using the above-mentioned photosensitive coloring composition.
- a coloring pattern is formed on the substrate. Specifically, a 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 board, an array substrate, or the like may be appropriately used. can.
- the coloring pattern can be formed by a photolithography method. Specifically, after the above-mentioned photosensitive coloring composition is applied onto a substrate to form a coating film, the coating film is exposed through a photomask having a predetermined pattern to photo-cure the exposed portion. Then, the unexposed portion is developed with an alkaline aqueous solution and then baked to form a predetermined coloring pattern.
- the method for applying the photosensitive coloring composition is not particularly limited, but a screen printing method, a roll coating method, a curtain coating method, a spray coating method, a spin coating method, or the like can be used.
- the solvent (D-1) or the solvent (D-2) is added by heating using a heating means such as a circulating oven, an infrared heater, or a hot plate, if necessary. It may be volatilized.
- the heating conditions are not particularly limited and may be appropriately set according to the type of the photosensitive coloring composition used. Generally, it may be heated at a temperature of 50 ° C. to 120 ° C. for 30 seconds to 30 minutes.
- the formed coating film is partially exposed by irradiating it with active energy rays such as ultraviolet rays and excimer laser light through a negative mask.
- active energy rays such as ultraviolet rays and excimer laser light through a negative mask.
- the energy dose to be irradiated may be appropriately selected depending on the composition of the photosensitive coloring composition, and is preferably 30 to 2000 mJ / cm2, for example.
- the light source used for exposure is not particularly limited, but a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, a xenon lamp, a metal halide lamp, or the like can be used.
- the alkaline aqueous solution used for development is not particularly limited, but is an aqueous solution of sodium carbonate, potassium carbonate, calcium carbonate, sodium hydroxide, potassium hydroxide and the like; an amino group system such as an ethylamino group, a diethylamino group and a dimethylethanolamino group.
- Aqueous compound tetramethylammonium, 3-methyl-4-amino-N, N-diethylaniline, 3-methyl-4-amino-N-ethyl-N- ⁇ -hydroxyethylaniline, 3-methyl-4-amino -N-ethyl-N- ⁇ -methanesulfonamide ethylaniline, 3-methyl-4-amino-N-ethyl-N- ⁇ -methoxyethylaniline and sulfates, hydrochlorides or p-toluenesulfonates thereof, etc.
- An aqueous solution of the p-phenylenediamino group compound of the above can be used.
- a defoaming agent or a surfactant may be added to these aqueous solutions as needed. Further, it is preferable to wash with water and dry after developing with the above alkaline aqueous solution.
- the baking conditions are not particularly limited, and the heat treatment may be performed according to the type of the photosensitive coloring composition used. Generally, it may be heated at 130 to 250 ° C. for 10 to 60 minutes.
- the above coating, exposure, development and baking are sequentially repeated using the photosensitive coloring composition for black matrix and the photosensitive coloring composition for red, green and blue pixels to obtain a desired coloring pattern. Can be formed.
- a protective film is formed on the colored pattern (each pixel of RGB and the black matrix), but the protective film is not particularly limited and may be formed by using a known one.
- the color filter manufactured in this way has excellent pigment dispersibility by realizing uniform miniaturization of the pigment, achieves high brightness, and has excellent heat resistance, solvent resistance, adhesion, and developability. It has various resist characteristics and is high-definition.
- the image display element of the present embodiment is an image display element provided with the above color filter, and specific examples thereof include a liquid crystal display element, an organic EL display element, a solid-state image pickup element such as a CCD element and a CMOS element, and the like. ..
- the image display element of the present embodiment may be manufactured according to a conventional method other than 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 electrodes, spacers, and the like are sequentially formed. Then, an electrode or the like may be formed on another substrate, the two may be bonded together, and a predetermined amount of liquid crystal may be injected and sealed.
- the weight average molecular weight described below means a standard polystyrene-equivalent weight average molecular weight measured under the following conditions using gel permeation chromatography (GPC).
- GPC gel permeation chromatography
- Developing solvent Tetrahydrofuran Detector: Differential refractometer (SHODEX RI-71S) (manufactured by Showa Denko KK)
- Flow velocity 1 mL / min
- a polymerization initiator was added to a monomer mixture consisting of 16.2 g of dicyclopentanyl methacrylate (m-1a), 26.5 g of acrylic acid (m-2), and 51.8 g of benzyl methacrylate (m-3).
- 8.0 g of t-butylperoxy-2-ethylhexanoate (8.4 parts by mass with respect to 100 parts by mass of the total of the monomers (m-1a), (m-2) and (m-3)).
- t-butylperoxy-2-ethylhexanoate 8.4 parts by mass with respect to 100 parts by mass of the total of the monomers (m-1a), (m-2) and (m-3)).
- the solution was sampled to measure the non-volatile content, and after confirming that the polymerization conversion was 98% or more in terms of the non-volatile content, 61 g of propylene glycol monomethyl ether acetate and a monomer having a tertiary amino group were used. 5 g of dimethylaminoethyl methacrylate was added, and the reaction was further carried out at 110 ° C. for 2 hours. After the reaction, the solution was sampled again to measure the non-volatile content, converted from the non-volatile content, and after confirming that the polymerization conversion rate was 98% or more, the solution was cooled.
- the solution was sampled to measure the non-volatile content, and after confirming that the polymerization conversion rate was 98% or more in terms of the non-volatile content, 61 g of propylene glycol monomethyl ether acetate and 30 as a monomer having a quaternary ammonium cation group were used. .0 g of methacryloyloxyethylbenzyldimethylammonium chloride was added, and the reaction was further carried out at 110 ° C. for 2 hours. After the reaction, the solution was sampled again to measure the non-volatile content, converted from the non-volatile content, and after confirming that the polymerization conversion rate was 98% or more, the solution was cooled.
- C.I. I. Pigment Green 58 (Fastogen Green A110 manufactured by DIC Corporation) was 7.5 g, and the sample No. having a tertiary amino group as the polymer dispersant (C). Sample No. 11 or quaternary ammonium cation group.
- the binder resin (A-1) of any of 12 the sample No. 1 to No. Any of 10 is mixed in the composition shown in Table 2, and propylene glycol monomethyl ether acetate is added as a solvent (D-1) so that the solid content excluding the zirconia beads is 24%, and a paint shaker (Red Devil Equipment) is added.
- the mixture was mixed and dispersed at room temperature for 2 hours in a Red Devil 5400 manufactured by Maker. Then, the content was suction-filtered with a glass filter to obtain the pigment dispersion composition No. 1-7, 10-13 were obtained.
- Example 5 Comparative Example 5> As the pigment (B), C.I. I. Pigment Green 58 was 9.4 g, EFKA-PX4300 was used as the polymer dispersant (C), and the sample No. 1 was used as the binder resin (A-1). 1, No. 6 or No. Pigment dispersion composition No. 10 was prepared in the same manner as in Example 1 except that any one of 10 was mixed in the composition shown in Table 2. 8-9 and 14 were obtained.
- the sample No. was prepared as a solution of the binder resin (A-2). 13 (molecular weight 32000, solid acid value 104 mgKOH / g, ethylenically unsaturated group equivalent 1100 g / mol) was obtained.
- the pigment dispersion composition No. When the solid content of 1 to 13 was 100 parts by mass, the sample No. 1 was used as the binder resin (A-2). 80 parts by mass of 13 as a solid content, 80 parts by mass of dipentaerythritol hexaacrylate as a reactive diluent (E), 1- [9-ethyl-6- (2-methylbenzoyl) as a photopolymerization initiator (F)) -9H-carbazole-3-yl-]-, -1- (O-acetyloxime) was mixed in an amount of 4 parts by mass, and propylene glycol monomethyl ether acetate was used as the solvent (D-2), and the total solid content was 30%.
- the photosensitive coloring composition No. 1 to 14 were prepared.
- the amount of each component blended with respect to 100 parts by mass of the pigment (B) is the photosensitive coloring composition No. 1-7, No. In 10 to 13, the binder resin (A-2) is 120 parts by mass, the reactive diluent (E) is 120 parts by mass, and the photopolymerization initiator (F) is 6 parts by mass.
- the photosensitive coloring composition No. 8, No. 9 and No. In No. 14, the binder resin (A-2) is 112 parts by mass, the reactive diluent (E) is 112 parts by mass, and the photopolymerization initiator (F) is 5.6 parts by mass.
- Photosensitive coloring composition No. 1-7, No. 10 to 13 are spin-coated on a 5 cm square glass substrate (non-alkali glass substrate) so that the average thickness of the final cured coating film is 2.0 ⁇ m, and then heated at 100 ° C. for 3 minutes to volatilize the solvent. I let you. Next, the entire surface of the coating film is exposed (USH-250BY manufactured by Ushio, Inc. is used as a lamp, the exposure amount is 40 mJ / cm 2 ), and then the coating film is further baked at 230 ° C. for 30 minutes to obtain a cured coating film, green. A color resist (1) was obtained.
- Photosensitive coloring composition No. 1-7, No. 10 to 13 are spin-coated on a 5 cm square glass substrate (non-alkali glass substrate) so that the average thickness of the final cured coating film is 2.0 ⁇ m, and then heated at 100 ° C. for 3 minutes to volatilize the solvent. I let you. Next, a line-and-space or dot pattern photomask is installed on the substrate to expose the coating film (USH-250BY manufactured by Ushio, Inc. is used as a lamp, the exposure amount is 40 mJ / cm 2 ), and the coating film is photocured. rice field. Then, it developed with 0.2 mass% potassium hydroxide aqueous solution. Further baking at 230 ° C. for 30 minutes gave a green color resist (2) as a cured coating film.
- Photosensitive coloring composition No. 1, No. 7-9, No. 14 is a green color resist (a green color resist) which is a cured coating film in the same manner as the method for producing a green color resist (1) except that the average thickness described later is adjusted on a 5 cm square glass substrate (non-alkali glass substrate). 3) was obtained.
- ⁇ Coloring power test> The film thickness of the green color resist (3) was measured with a step meter (ET4000M manufactured by Kosaka Laboratory Co., Ltd.). The film thickness was evaluated on a scale of ⁇ , ⁇ , and ⁇ according to the following criteria, and ⁇ and ⁇ were judged as acceptable. The evaluation results are shown in Table 4. ⁇ : Film thickness less than 1.9 ⁇ m ⁇ : Film thickness 1.9 to 2.1 ⁇ m X: Film thickness 2.1 ⁇ m or more
- ⁇ Transmittance test> The transmittance of the green color resists (1) and (3) at 525 nm was measured using a spectrophotometer UV-1650PC manufactured by Shimadzu Corporation. Tables 3 and 4 show the measurement results as ⁇ (pass) when the transmittance is 95.0% or more and ⁇ (fail) when the transmittance is 94.9% or less.
- ⁇ Developability test> In the developability test, the development speed and the pattern shape were evaluated. Regarding the development speed, in the development step of the green color resist (2), the time required for the pattern to be completely visible during development with 0.2% by mass potassium hydroxide aqueous solution was measured, and ⁇ , ⁇ was determined according to the following criteria. , X was evaluated on a three-point scale, and ⁇ and ⁇ were judged as acceptable. The evaluation results are shown in Table 3. ⁇ : less than 40 seconds ⁇ : 40 seconds or more and less than 80 seconds ⁇ : 80 seconds or more
- the pattern shape was applied under the conditions that passed the development speed, and the shape of the pattern end face of the cured coating film of the green color resist (2) was measured with a scanning electron microscope (S-3400N manufactured by Hitachi High-Technologies Corporation). confirmed. Based on the following criteria, the evaluation was made on a two-point scale of ⁇ (pass) and ⁇ (fail). The evaluation results are shown in Table 3.
- ⁇ Good end face shape (not reverse taper shape)
- ⁇ The end face has a reverse taper shape.
- the photosensitive coloring composition has sufficient coloring power even in a thin film state by increasing the concentration of the pigment, and suppresses the bleed-out of the coloring agent by reducing the concentration of the dispersant and the binder resin, and has excellent solvent resistance. It turned out to show.
- Comparative Examples 1 and 6 had good pigment dispersibility and storage stability of the pigment dispersion composition.
- the binder resin (A-1) does not have a structural unit derived from the ethylenically unsaturated group-containing compound (m-4), the curability of the photosensitive coloring composition was poor. As a result, peeling of the green color resist and the reverse taper shape of the developed pattern were confirmed in the solvent resistance test.
- Comparative Examples 3 to 4 and 8 to 9 do not have a structural unit derived from acrylic acid (m-2) and an aromatic ring-containing polymerizable monomer (m-3) in the binder resin (A-1).
- the pigment dispersibility and storage stability of the pigment dispersion composition were extremely poor.
- the storage stability of the photosensitive coloring composition is also poor, the transmittance and developability are also poor, and the composition is difficult to actually use.
- the binder resin (A-1) having a low content ratio of structural units derived from the aromatic ring-containing polymerizable monomer (m-3) can be applied to pigment dispersion compositions having a low pigment concentration, such as Examples 7 and 16. However, when the pigment concentration is high, the storage stability tends to decrease.
- the pigment dispersibility and the storage stability of the pigment dispersion composition are sufficient, high brightness can be achieved, bleed-out of the colorant is suppressed, and excellent heat resistance and solvent resistance are achieved. It is possible to provide a highly reliable pigment dispersion composition having pattern adhesion. Further, it is possible to provide a photosensitive coloring composition containing the pigment dispersion composition and a color filter containing the photosensitive coloring composition.
- the present invention it is possible to provide a pigment dispersion composition having good pigment dispersibility and storage stability. Further, by using the pigment dispersion composition, it is possible to provide a photosensitive coloring composition capable of obtaining a cured product having excellent solvent resistance. Further, it is possible to provide a color filter having a cured product of the photosensitive coloring composition and an image display element provided with the color filter.
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Abstract
Description
本願は、2020年11月13日に、日本に出願された特願2020-189475号に基づき優先権を主張し、その内容をここに援用する。
カラーフィルターは、一般に、ガラス基板などの透明基板と、透明基板上に形成された赤、緑及び青の画素と、画素の境界に形成されるブラックマトリックスと、画素及びブラックマトリックス上に形成される保護膜とから構成される。このような構成を有するカラーフィルターは、通常、透明基板上にブラックマトリックスや画素といった着色パターンや、保護膜といったパターンを順次形成することによって製造される。各種パターンの形成方法としては、様々な方法が提案されている。その中で、感光性樹脂組成物をレジストとして用い、塗布、露光、現像及びベーキングを繰り返すフォトリソグラフィ工法で作製される顔料/染料分散法は、耐久性に優れ、ピンホールなどの欠陥が少ない着色パターンを与えるため、現在の主流となっている。
一般に、フォトリソグラフィ工法に用いられる感光性樹脂組成物には、ネガ型レジスト特性が求められる。例えば特許文献1には、酸基と炭素数10~20の橋かけ環式炭化水素基とを有するポリマー(A)を用いることが開示されている。
さらに、色再現範囲を拡大するために、着色剤の色材を高濃度化する取組も行われている。
また、色材の高濃度化に伴い、分散剤の濃度やバインダー樹脂の濃度が低減するため、より少量の分散剤やバインダー樹脂、他の組成物で、顔料分散性や顔料分散組成物の保存安定性、耐熱性、耐溶剤性、パターン密着性等の各種レジスト特性を発現することが求められていた。
また、当該顔料分散組成物を用いることにより、現像性に優れ、耐熱性、耐溶剤性、パターン密着性に優れた樹脂硬化膜が得られる感光性着色組成物、その硬化物を有するカラーフィルター、これ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] バインダー樹脂(A-1)と、
顔料(B)と、
高分子分散剤(C)と、
溶剤(D-1)と、
を含有し、
前記バインダー樹脂(A-1)が、樹脂(A-1a)及び樹脂(A-1b)からなる群から選択される少なくとも1種の樹脂であり、
前記樹脂(A-1a)は、炭素数10~20の橋かけ環式炭化水素基を有する重合性モノマー(m-1a)(但し、重合性モノマー(m-1b)を除く)及び下記式(1)で示される重合性モノマー(m-1b)からなる群から選択される少なくとも一種の重合性モノマー(m-1)と、アクリル酸(m-2)と、芳香環含有重合性モノマー(m-3)とを含むモノマー(M)の共重合体(P)のカルボキシ基の一部にカルボキシ基と反応性を有する基を有するエチレン性不飽和基含有化合物(m-4)が付加した樹脂であり、
前記樹脂(A-1b)は、前記樹脂(A-1a)において、前記エチレン性不飽和基含有化合物(m-4)がエポキシ基又はオキセタニル基を有するモノマーであり、それらの開環付加により生じるヒドロキシ基の一部にイソシアナト基を有するエチレン性不飽和基含有化合物(m-5)及び多塩基酸無水物(m-6)から選択される一種以上が付加した樹脂である
ことを特徴とする顔料分散組成物。
[2] 前記顔料(B)が、ハロゲン化フタロシアニン骨格を有する顔料を含む[1]に記載の顔料分散組成物。
[3] 前記高分子分散剤(C)が、3級アミノ基及び4級アンモニウムカチオン基からなる群から選択される少なくとも1種の基を有する[1]または[2]に記載の顔料分散組成物。
[4] 前記高分子分散剤(C)が、
3級アミノ基とエチレン性不飽和基を有するモノマー、及び4級アンモニウムカチオン基とエチレン性不飽和基を有するモノマーからなる群から選択される少なくとも1種のモノマーと、
他のエチレン性不飽和基を有するモノマーと
のブロック重合物であることを特徴とする、[1]~[3]のいずれかに記載の顔料分散組成物。
[5] 前記エチレン性不飽和基含有化合物(m-4)が有するカルボキシ基と反応性を有する基が、エポキシ基又はオキセタニル基である[1]~[4]のいずれかに記載の顔料分散組成物。
[6] 前記共重合体(P)の前記重合性モノマー(m-1)、前記アクリル酸(m-2)、前記芳香族含有重合性モノマー(m-3)の合計を100モル%とした場合に、芳香族含有重合性モノマー(m-3)の割合が9~70モル%であることを特徴とする、[1]~[5]のいずれかに記載の顔料分散組成物。
[7] 前記バインダー樹脂(A-1)が、前記樹脂(A-1b)である[1]~[6]のいずれかに記載の顔料分散組成物。
[8] 前記顔料(B)100質量部に対して、
前記バインダー樹脂(A-1)を10~50質量部を含有し、
前記高分子分散剤(C)を10~80質量部を含有する[1]~[7]のいずれかに記載の顔料分散組成物。
[9] [1]~[8]のいずれかに記載の顔料分散組成物と、
バインダー樹脂(A-2)と、
反応性希釈剤(E)と、
光重合開始剤(F)と
を含有することを特徴とする感光性着色組成物。
[10] 前記顔料(B)100質量部に対して、
前記バインダー樹脂(A-1)と(A-2)との合計を50~280質量部含有し、
前記高分子分散剤(C)を10~80質量部を含有し、
前記反応性希釈剤(E)を40~200質量部含有し、
前記光重合開始剤(F)を0.1~10質量部含有する[9]に記載の感光性着色組成物。
[11] [9]または[10]に記載の感光性着色組成物を硬化させてなる樹脂硬化膜。
[12] [0]または[10]に記載の感光性着色組成物の硬化物を有するカラーフィルター。
[13] [12]に記載のカラーフィルターを具備する画像表示素子。
以下、本発明の実施形態について詳細に説明する。ただし、本発明は、以下に示す実施形態に限定されるものではない。なお、本明細書において「(メタ)アクリロイルオキシ基」とは、メタクリロイルオキシ基およびアクリロイルオキシ基から選択される一種以上を表す。「(メタ)アクリル酸」「(メタ)アクリレート」も同様である。
本実施形態の顔料分散組成物は、バインダー樹脂(A-1)と、顔料(B)と、高分子分散剤(C)と、溶剤(D-1)とを含有する。
バインダー樹脂(A-1)が、下記の樹脂(A-1a)及び樹脂(A-1b)からなる群から選択される少なくとも1種の樹脂である。
樹脂(A-1a)は、共重合体(P)のカルボキシ基の一部に、エチレン性不飽和基含有化合物(m-4)が付加した樹脂である。前記エチレン性不飽和基含有化合物(m-4)は、カルボキシ基と反応性を有する基を有すものである。前記共重合体(P)は、炭素数10~20の橋かけ環式炭化水素基を有する重合性モノマー(m-1a)(但し、重合性モノマー(m-1b)を除く)及び下記式(1)で示される重合性モノマー(m-1b)からなる群から選択される少なくとも一種の重合性モノマー(m-1)と、アクリル酸(m-2)と、芳香環含有重合性モノマー(m-3)とを含むモノマー(M)の共重合体である。
樹脂(A-1b)は、前記樹脂(A-1a)にエチレン性不飽和基含有化合物(m-5)及び多塩基酸無水物(m-6)から選択される一種以上が付加した樹脂である。前記エチレン性不飽和基含有化合物(m-5)がイソシアナト基を有する。前記樹脂(A-1a)は、前記共重合体(P)のカルボキシ基の一部に、エポキシ基又はオキセタニル基を有する前記エチレン性不飽和基含有化合物(m-4)が付加した樹脂である。前記樹脂(A-1a)は、それらの開環付加により生じる複数のヒドロキシ基を有する。該複数のヒドロキシ基の一部に前記エチレン性不飽和基含有化合物(m-5)及び前記多塩基酸無水物(m-6)から選択される一種以上が付加した。
本実施形態のバインダー樹脂(A-1)の一形態は、カルボキシ基を有する共重合体(P)のカルボキシ基の一部に、反応性を有する基を有するエチレン性不飽和基含有化合物(m-4)が付加した樹脂(A-1a)である。上記共重合体(P)は、炭素数10~20の橋かけ環式炭化水素基を有する重合性モノマー(m-1a)(但し、重合性モノマー(m-1b)を除く)及び下記式(1)で示される重合性モノマー(m-1b)からなる群から選択される少なくとも一種の重合性モノマー(m-1)と、アクリル酸(m-2)と、芳香環含有重合性モノマー(m-3)とを含むモノマー(M)の共重合体である。
「共重合体(P)」
本実施形態に用いる共重合体(P)は、構成モノマー(M)として、炭素数10~20の橋かけ環式炭化水素基を有する重合性モノマー(m-1a)及び下記式(1)で示される重合性モノマー(m-1b)からなる群から選択される少なくとも一種の重合性モノマー(m-1)と、アクリル酸(m-2)と、芳香環含有重合性モノマー(m-3)とを含有する。「炭素数10~20の橋かけ環式炭化水素基を有する重合性モノマー(m-1a)」、「下記式(1)で示される重合性モノマー(m-1b)」、「重合性モノマー(m-1)」、「アクリル酸(m-2)」、および「芳香環含有重合性モノマー(m-3)」について、それぞれ「モノマー(m-1a)」、「モノマー(m-1b)」、「モノマー(m-1)」、「モノマー(m-2)」、および「モノマー(m-3)」ということがある。
モノマー(m-1)は、モノマー(m-1a)及びモノマー(m-1b)から選択される少なくとも一種である。
モノマー(m-1a)は、炭素数10~20の橋かけ環式炭化水素基を有する。ここで、橋かけ環式炭化水素とは、下記式(3)又は(4)で表される構造を有するものが好ましい。橋かけ環式炭化水素の例は、アダマンタン、ノルボルナンを含む。橋かけ環式炭化水素基とは、当該構造における一部の水素原子を除いた残りの部分に相当する基を言う。また、モノマー(m-1a)は、後述のモノマー(m-1b)を含まないものとする。
なお、モノマー(m-1a)及びモノマー(m-1b)は、いずれか一方を単独で用いてもよいし、両方を用いてもよい。特に、硬度の観点から、モノマー(m-1)としては、アダマンチル(メタ)アクリレート又は上記式(5)で示される構造を有する(メタ)アクリレートが好ましく、ジシクロペンタニル(メタ)アクリレートがより好ましい。
本実施形態の共重合体(P)は、構成モノマー(M)としてモノマー(m-2)を含有する。モノマー(m-2)がアクリル酸である。バインダー樹脂(A-1)が、モノマー(m-2)由来のカルボキシ基を有することで、アルカリ現像液との親和性が高まり、現像性に優れた着色感光性組成物が得られ、厳密な寸法精度を持つ高精細なカラーフィルターを提供することができる。特にモノマー(m-2)を共重合体(P)として用いることにより、カルボキシ基、スルホ基、ホスホ基等を有する他の酸基含有重合性モノマーと比較して、顔料分散性や保存安定性に優れた顔料分散組成物が得られる。そのため、顔料分散性向上に伴うカラーフィルターの輝度や透過率の向上が期待できる。また、顔料分散性向上に伴い、露光時の顔料粒子による光の産卵も低減できるため、感光性着色組成物としての現像性向上にも寄与する。
本実施形態の共重合体(P)は、本発明の効果を損なわない範囲で、構成モノマーとしてモノマー(m-2)以外の酸基含有重合性モノマーを併用することができるが、上述の理由から、使用しない方が好ましい。
モノマー(m-3)は、モノマー(m-1a)、モノマー(m-1b)、モノマー(m-2)以外であって、芳香環を含む重合性モノマーであれば特に限定されない。モノマー(m-3)が含まれることで、顔料(B)との親和性が向上し、顔料分散性や保存安定性に優れた顔料分散組成物が得られる。それに伴い、顔料の高濃度化により、分散剤やバインダー樹脂の濃度が低減した場合においても、十分な顔料分散性や保存安定性が得られる顔料分散組成物を提供することができる。
本実施形態の共重合体(P)における各モノマーの配合割合(各モノマーのモル比)については、特に制限はないが、モノマー(m-1)、(m-2)、(m-3)の合計を100モル%とした場合に、モノマー(m-1)の割合は、好ましくは1~40モル%、より好ましくは2~20モル%、さらに好ましくは5~15モル%である。なお、モノマー(m-1)内のモノマー(m-1a)及び/又は(m-1b)の割合について制限は無く、任意の配合割合を取ることができる。モノマー(m-1)の配合割合が1モル%以上あると、モノマー(m-1)由来の所望の特性が得られ、この配合割合が40モル%以下であると、他の重合性モノマーを十分に配合することができ、他の特性との両立が図れる。
本実施形態の共重合体(P)は、前記モノマー(m-1)、(m-2)、(m-3)由来の所望の特性を妨げない範囲で、その他重合性モノマー由来の構成単位を含んでもよい。すなわち、前記モノマー(m-1a)、(m-1b)、(m-2)、(m-3)以外に共重合可能なその他重合性モノマーを含んでも良い。その他重合性モノマーは、一般にエチレン性不飽和基を有するラジカル重合性化合物であり、具体例としては、ブタジエン等のジエン類;メチル(メタ)アクリレート、エチル(メタ)アクリレート、n-プロピル(メタ)アクリレート、イソ-プロピル(メタ)アクリレート、n-ブチル(メタ)アクリルレート、sec-ブチル(メタ)アクリレート、イソ-ブチル(メタ)アクリレート、tert-ブチル(メタ)アクリルレート、ペンチル(メタ)アクリレート、ネオペンチル(メタ)アクリレート、イソアミル(メタ)アクリレート、ヘキシル(メタ)アクリレート、2-エチルヘキシル(メタ)アクリレート、ラウリル(メタ)アクリレート、ドデシル(メタ)アクリレート、シクロペンチル(メタ)アクリレート、シクロヘキシル(メタ)アクリレート、メチルシクロヘキシル(メタ)アクリレート、エチルシクロヘキシル(メタ)アクリレート、アリル(メタ)アクリレート、テトラヒドロフルフリル(メタ)アクリレート、3-(N,N-ジメチルアミノ)プロピル(メタ)アクリレート、等の非反応性(メタ)アクリル酸エステル類;2-ヒドロキシエチル(メタ)アクリレート、2-ヒドロキシプロピル(メタ)アクリレート、3-ヒドロキシプロピル(メタ)アクリレート、3-ヒドロキシブチル(メタ)アクリレート、4-ヒドロキシブチル(メタ)アクリレート、3-ヒドロキシペンチル(メタ)アクリレート、4-ヒドロキシペンチル(メタ)アクリレート、5-ヒドロキシペンチル(メタ)アクリレート、4-ヒドロキシヘキシル(メタ)アクリレート、5-ヒドロキシヘキシル(メタ)アクリレート、6-ヒドロキシヘキシル(メタ)アクリレート、5-ヒドロキシ-3-メチル-ペンチル(メタ)アクリレート、シクロヘキサン-1,4-ジメタノール-モノ(メタ)アクリレート、2-(2-ヒドロキシエチルオキシ)エチル(メタ)アクリレート、2,3-ジヒドロキシ(メタ)アクリレート、ブタントリオールモノ(メタ)アクリレート、ペンタントリオールモノ(メタ)アクリレート、グリシジル(メタ)アクリレート、4-ヒドロキシブチル(メタ)アクリレートグリシジルエーテル、3,4-エポキシシクロヘキシルメチル(メタ)アクリレート、 (3-エチルオキセタン-3-イル)メチル(メタ)アクリレート、2-イソシアナトエチル(メタ)アクリレート、2-イソシアナトプロピル(メタ)アクリレート、3-イソシアナトプロピル(メタ)アクリレート、2-イソシアナト-1-メチルエチル(メタ)アクリレート、2-イソシアナト-1,1-ジメチルエチル(メタ)アクリレート、4-イソシアナトシクロヘキシル(メタ)アクリレート、1,1-(ビスアクリロイルオキシメチル)エチルイソシアネート、前記のイソシアナト基を有するエチレン性不飽和化合物のイソシアナト基を、ブロック剤を用いてブロック化したブロックイソシアナト基を有する化合物等の反応性(メタ)アクリル酸エステル類;(メタ)アクリル酸アミド、(メタ)アクリル酸N,N-ジメチルアミド、(メタ)アクリル酸N,N-ジエチルアミド、(メタ)アクリル酸N,N-ジプロピルアミド、(メタ)アクリル酸N,N-ジ-イソ-プロピルアミド、(メタ)アクリル酸アントラセニルアミド等の(メタ)アクリル酸アミド;(メタ)アクリル酸アニリド、(メタ)アクリロイルニトリル、アクロレイン、塩化ビニル、塩化ビニリデン、フッ化ビニル、フッ化ビニリデン、N-ビニルピロリドン、ビニルピリジン、酢酸ビニル、ビニルトルエン等のビニル化合物;N-シクロヘキシルマレイミド、N-ラウリルマレイミド等のマレイミド類;シトラコン酸ジエチル、マレイン酸ジエチル、フマル酸ジエチル、イタコン酸ジエチル等の不飽和ジカルボン酸ジエステル等が挙げられる。これらは、必要に応じて、単独で用いてもよいし、2種以上を組み合わせて用いてもよい。
本実施形態の共重合体(P)におけるその他重合性モノマーの割合は、モノマー(m-1)、(m-2)、(m-3)、その他重合性モノマーの合計を100モル%とした場合、好ましくは10モル%以下、より好ましくは5モル%以下である。
続いて、共重合体(P)に、カルボキシ基と反応性を有する基を有するエチレン性不飽和基含有化合物(m-4)、さらに任意化合物として、イソシアナト基を有するエチレン性不飽和基含有化合物(m-5)及び多塩基酸無水物(m-6)から選択される一種以上を付加したバインダー樹脂(A-1)について説明する。
「カルボキシ基と反応性を有する基を有するエチレン性不飽和基含有化合物(m-4)」、「イソシアナト基を有するエチレン性不飽和基含有化合物(m-5)」、及び「多塩基酸無水物(m-6)」について、それぞれ「化合物(m-4)」、「化合物(m-5)」、及び「化合物(m-6)」をいうことがある。
化合物(m-4)は、カルボキシ基と反応性を有する基とエチレン性不飽和基を有する。カルボキシ基と反応性を有する基としては、エポキシ基、オキセタニル基、イソシアナト基、水酸基、アミノ基が挙げられる。
前記共重合体(P)のモノマー(m-2)由来のカルボキシ基と、化合物(m-4)が有するカルボキシ基と反応性を有する基とが付加することにより、前記共重合体(P)の側鎖にエチレン性不飽和基を導入することができる。バインダー樹脂(A-1)が化合物(m-4)由来のエチレン性不飽和基を有することにより、顔料(B)のブリードアウトを抑制し、耐熱性、耐溶剤性、パターン密着性、現像性等の優れたレジスト特性を発現する顔料分散組成物を提供することができる。
化合物(m-4)としてエポキシ基又はオキセタニル基を有する化合物を用いた場合、必要に応じて、更に(m-5)を用いても良い。化合物(m-5)は、カルボキシ基、エポキシ基、オキセタニル基を有さず、イソシアナト基とエチレン性不飽和基を有するモノマーである。前記樹脂(A-1a)の複数のヒドロキシ基の一部に化合物(m-5)が付加することで、樹脂(A-1b)が得られる。その結果、前記樹脂(A-1a)にさらにエチレン性不飽和基が導入される。前記樹脂(A-1b)を用いることで、耐熱性、耐溶剤性、パターン密着性、現像性等の各種レジスト特性をさらに高めることができる。前記樹脂(A-1a)の前記複数ヒドロキシ基は、前記共重合体(P)のモノマー(m-2)由来のカルボキシ基に化合物(m-4)のエポキシ基、オキセタニル基が開環付加して生じたものである。前記樹脂(A-1a)は、バインダー樹脂(A-1)の一形態であり、前記樹脂(A-1b)は、前記バインダー樹脂(A-1)のその他の形態である。
化合物(m-6)が多塩基酸無水物である。化合物(m-4)としてエポキシ基又はオキセタニル基を有する化合物を用いた場合、必要に応じて、更に化合物(m-6)を用いても良い。化合物(m-6)は、酸無水物構造を有するものであれば特に限定されないが、反応後に副生成物が発生しない環構造を有するものが好ましい。前記樹脂(A-1a)の複数ヒドロキシ基の一部に化合物(m-6)を付加することで、樹脂(A-1b)が得られる。その結果、前記樹脂(A-1a)にカルボキシ基が導入される。前記樹脂(A-1b)を用いることで、感光性着色組成物としての現像性向上に寄与する。前記樹脂(A-1a)の前記複数ヒドロキシ基は、前記共重合体(P)のモノマー(m-2)由来のカルボキシ基に化合物(m-4)のエポキシ基、オキセタニル基が開環付加して生じたものである。前記樹脂(A-1a)は、バインダー樹脂(A-1)の一形態であり、前記樹脂(A-1b)は、前記バインダー樹脂(A-1)のその他の形態である。
前記共重合体(P)に対する化合物(m-4)の導入割合については、モノマー(m-1)~(m-3)の合計を100モル%としたときに、好ましくは5~90モル%、より好ましくは10~70モル%、さらに好ましくは10~40モル%である。また、アクリル酸(m-2)を100モル%としたときに、好ましくは5~90モル%、より好ましくは10~70モル%、さらに好ましくは20~50モル%である。
化合物(m-4)の配合割合を前記の範囲内にすることで、エチレン性不飽和基を導入することによる効果を発揮することができ、さらに未反応の化合物(m-4)の残存も低減できる。
前記共重合体(P)に対する化合物(m-5)及び化合物(m-6)の合計の導入割合については、モノマー(m-1)~(m-3)の合計を100モル%としたときに、好ましくは3~70モル%、より好ましくは5~50モル%、さらに好ましくは5~25モル%である。また、化合物(m-4)を100モル%としたときに、好ましくは5~90モル%、より好ましくは20~80モル%、さらに好ましくは40~70モル%である。
エチレン性不飽和基含有化合物(m-5)及び多塩基酸無水物(m-6)の合計の導入割合を前記の範囲内にすることで、導入することによる効果を発揮することができ、さらに未反応モノマーの残存も低減できる。
(m-5)及び化合物(m-6)の導入割合を上述のように調整することで、所望の性能を付加価値的に得ることができる。
本実施形態におけるバインダー樹脂(A-1)の酸価(JIS K6901 5.3等に示す規格に沿って測定された値)は、アクリル酸(m-2)由来のカルボン酸が含まれており、0mgKOH/g以上であれば特に限定されないが、好ましくは10~400mgKOH/gであり、より好ましくは30~300mgKOH/g、最も好ましくは50~200mgKOH/gである。バインダー樹脂(A-1)の酸価が10mgKOH/g以上であれば、感光性着色組成物としての現像性が良好である。一方、バインダー樹脂(A-1)の酸価が400mgKOH/g以下であれば、顔料分散組成物および感光性着色組成物に含まれる他成分との親和性を損なうことなく、均一な組成物を提供することができる。
バインダー樹脂(A-1)の前駆体である共重合体(P)は、当該技術分野における公知のラジカル重合方法に従って共重合反応を行うことによって得られる。例えば、共重合に用いるモノマーを溶剤に溶解した後、その溶液に重合開始剤を添加し、50~130℃で1~20時間反応させればよい。また、50~130℃に調整した溶剤に、共重合に用いるモノマーと重合開始剤を滴下しながら反応させてもよい。
本実施形態における顔料(B)は、組成物中に均一に分散しカラーフィルターの画素を形成することができれば、特に限定されない。赤、緑、青といった光の三原色の顔料をはじめ、補色として利用できる黄、橙、紫等の顔料、及びブラックマトリックスで利用される黒、茶等の顔料等、各色の顔料を使用することができる。また、顔料(B)の化学構造としては、イソインドリノン、イソインドリン、アゾメチン、アントラキノン、アントロン、キサンテン、ジケトピロロピロール、ペリレン、ペリノン、キナクリドン、インジゴイド、ジオキサジン、インジゴイド、フタロシアニン、アントシアニン、アゾ系等のあらゆる有機顔料や、カーボンブラックやチタンブラック、二酸化チタン等の無機顔料が挙げられる。
自ら準備する場合は、公知の製造方法を利用する。例えば、芳香環の水素原子の一部又は全てがハロゲン原子に置換されたフタロ酸やフタロニトリル等を出発原料とし、モリブデン酸アンモニウム等の触媒下フタロシアニン骨格を形成する方法や、フタロシアニンを塩素ガスや臭素ガスでハロゲン化する方法が挙げられる。これらの方法で得られた粗顔料をボールミル、振動ミル等の粉砕機内で乾式摩砕し、公知のソルベントソルトミリング法等で処理することで、所望の緑色顔料を得ることができる。
高分子分散剤(C)は、顔料(B)を分散することができるものであれば、特に限定されない。顔料分散性や保存安定性の観点からは、3級アミノ基及び4級アンモニウムカチオン基からなる群から選択される少なくとも1種の置換基を有する高分子化合物が好ましい。例えば、3級アミノ基とエチレン性不飽和基を有するモノマーや4級アンモニウムカチオン基とエチレン性不飽和基を有するモノマーを単独重合又は共重合させたポリアミン(あるいはポリアンモニウムカチオン塩)、またはこれらのモノマーと他のエチレン性不飽和基を有するモノマーと共重合させたポリアミン(あるいはポリアンモニウムカチオン塩)、1級及び/又は2級アミノ基を1つ以上含む高分子化合物をアルキル化させ3級アミノ基を形成させた化合物や、3級アミノ基にさらに酸性化合物やハロゲン化アルキル化合物を作用させ4級アンモニウムカチオン塩を形成させた化合物等が挙げられる。
前記高分子分散剤(C)が、3級アミノ基とエチレン性不飽和基を有するモノマー及び4級アンモニウムカチオン基とエチレン性不飽和基を有するモノマーからなる群から選択される少なくとも1種のモノマーと、他のエチレン性不飽和基を有するモノマーと、のブロック重合物であることが好ましい。前記他のエチレン性不飽和基を有するモノマーとしては、一例として、アルキル基、アリール基、アラルキル基、シクロアルキル基、アルキレングリコール基等を有する(メタ)アクリレートが挙げられる。
なお、他の顔料分散組成物と親和性を高められる他のエチレン性不飽和基を有するモノマーの一例として、アルキル基、アリール基、アラルキル基、シクロアルキル基、アルキレングリコール基等を有する(メタ)アクリレートが挙げられる。
4級アンモニウムカチオン基とエチレン性不飽和基を有するモノマーの具体例としては、3級アミノ基を有するモノマーの有機ハロゲン化合物塩が挙げられる。有機ハロゲン化合物塩に特に制限は無いが、入手のし易さの観点から、具体例として、塩化メチル、塩化エチル、塩化プロピル、塩化ブチル、塩化ベンジル、塩化エチルアルコール、臭化メチル、臭化エチル、臭化プロピル、臭化ブチル、臭化ベンジル、臭化エチルアルコール、ヨウ化メチル、ヨウ化エチル、ヨウ化プロピル、ヨウ化ブチル、ヨウ化ベンジル、ヨウ化エチルアルコール等が挙げられる。なお、4級アンモニウムカチオン基の導入は、上記モノマーを使わずとも、3級アミノ基を有するモノマーと他のエチレン性不飽和基を有するモノマーをブロック重合した後、有機ハロゲン化合物塩を3級アミンに任意の温度、触媒存在下で付加し、3級アミンの一部または全部を4級アンモニウムカチオン基に置き換えることで導入しても良い。
一方、他の顔料分散組成物と親和性を高められる他のエチレン性不飽和基を有するモノマーとしては、一例として、アルキル基、アリール基、アラルキル基、シクロアルキル基、(ポリ)オキシアルキレン骨格等を有する(メタ)アクリレートが挙げられるが、他の顔料分散組成物と親和性を損なうものでなければ特に制限は無い。具体例としては、メチル(メタ)アクリレート、エチル(メタ)アクリレート、n-プロピル(メタ)アクリレート、イソプロピル(メタ)アクリレート、n-ブチル(メタ)アクリレート、イソブチル(メタ)アクリレート、t-ブチル(メタ)アクリレート、2-エチルヘキシル(メタ)アクリレート、シクロヘキシル(メタ)アクリレート、ステアリル(メタ)アクリレート、ラウリル(メタ)アクリレート、テトラヒドロフルフリル(メタ)アクリレート、イソボルニル(メタ)アクリレート、フェニル(メタ)アクリレート、ベンジル(メタ)アクリレート、フェノキシエチル(メタ)アクリレート、フェノキシジエチレングリコール(メタ)アクリレート、メトキシポリプロピレングリコール(メタ)アクリレート、又はエトキシポリエチレングリコール(メタ)アクリレート等の(メタ)アクリレート類;スチレン又はα-メチルスチレン等のスチレン類;エチルビニルエーテル、n-プロピルビニルエーテル、イソプロピルビニルエーテル、n-ブチルビニルエーテル、又はイソブチルビニルエーテル等のビニルエーテル類;酢酸ビニル、又はプロピオン酸ビニル等の脂肪酸ビニル類等が挙げられる。これらのモノマーは単独で用いても良いし、2種以上を用いても良い。
溶剤(D-1)は、本実施形態の顔料分散組成物、または感光性着色組成物に含まれる各成分と反応せず、かつこれらを溶解または分散可能な溶剤であれば特に限定されない。溶剤(D-1)としては、バインダー樹脂(A-1)や高分子分散剤(C)を製造する際に用いた溶剤と同じものを用いることができ、反応後に含まれている溶剤をそのまま用いることもでき、更に加えることもできる。また、その他の成分を加える際に、そこに共存しているものでもよい。
本実施形態の顔料分散組成物における、各成分の好適な配合量は以下の通りである。
本実施形態の顔料分散組成物は、バインダー樹脂(A-1)、顔料(B)、高分子分散剤(C)、溶剤(D-1)を所定量秤量し、公知の分散処理工程を用いて顔料(B)を微細化し分散する。この分散処理工程において、ペイントシェイカー、ビーズミル、ボールミル、ロールミル、ストーンミル、ジェットミル、ホモジナイザー、プラネタリミキサー、自転公転ミキサー等の装置が多用される。また、この分散処理工程において、直径0.01~10mmのビーズを用いると、顔料(B)の均一な微細化を効率良く行うことができる。ビーズの材質に制限は無いが、硬さや顔料分散組成物へのコンタミ等を踏まえると、ガラスビーズやジルコニアビーズの使用が好ましい。分散処理の好適な時間、温度、ビーズの直径、使用量に関しては、顔料分散組成物の組成や装置の大きさ等により適正な条件が異なるため、適宜調整すればよい。
最後に、顔料分散組成物に微細なゴミ、ならびに顔料(B)の粗粒や凝集物を除去する目的で、顔料分散組成物をガラスフィルター等でろ過処理することが好ましい。
本実施形態の感光性着色組成物は、上記顔料分散組成物と、バインダー樹脂(A-2)と、反応性希釈剤(E)と、光重合開始剤(F)と、を含有する。本実施形態の感光性着色組成物は溶剤(D-2)を含んでもよい。本実施形態の感光性着色組成物において、顔料(B)100質量部に対して、前記バインダー樹脂(A-1)とバインダー樹脂(A-2)との合計バインダー樹脂(A)を50~280質量部、前記反応性希釈剤(E)を40~200質量部、および前記光重合開始剤(F)を0.1~10質量部含有する好ましい。
溶剤(D-2)は、上記顔料分散組成物に含まれている溶剤(D-1)と共通のものを使用してもよく、異なるものを追添しても良い。
感光性着色組成物に使われるバインダー樹脂(A-2)としては、特に限定されないが、ネガ型レジストに一般的に用いられる(メタ)アクリル樹脂、エポキシ(メタ)アクリル樹脂、ビニルエステル樹脂といった樹脂が好ましく、具体的な骨格として、ビニル基、(メタ)アクリロイル基等のエチレン性不飽和二重結合と、カルボン酸やリン酸、スルホン酸等のアルカリ可溶性に寄与する置換基とを含む樹脂が好ましい。これらの樹脂を用いることで、優れたパターン密着性や現像性を有する感光性着色組成物を提供することができる。
反応性希釈剤(E)は、ビニル基、(メタ)アクリロイルオキシ基等のエチレン性不飽和二重結合を含む低分子化合物であれば特に限定されない。反応性希釈剤(E)の具体例としては、スチレン、α-メチルスチレン、α-クロロメチルスチレン、ビニルトルエン、ジビニルベンゼン、ジアリルフタレート、ジアリルベンゼンホスホネート等の芳香族ビニル系モノマー類;酢酸ビニル、アジピン酸ビニル等のポリカルボン酸モノマー類;メチル(メタ)アクリレート、エチル(メタ)アクリレート、プロピル(メタ)アクリレート、ブチル(メタ)アクリレート、β-ヒドロキシエチル(メタ)アクリレート、ヒドロキシプロピル(メタ)アクリレート、エチレングリコールジ(メタ)アクリレート、ジエチレングリコールジ(メタ)アクリレート、プロピレングリコールジ(メタ)アクリレート、エチレングリコールジ(メタ)アクリレート、トリメチロールプロパンジ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、ペンタエリスリトールテトラ(メタ)アクリレート、ジペンタエリスリトールヘキサ(メタ)アクリレート、トリス(ヒドロキシエチル)イソシアヌレートのトリ(メタ)アクリレート等の(メタ)アクリル系モノマー;トリアリルシアヌレート等が挙げられる。これらは、単独で用いてもよいし、2種以上を組み合わせて用いてもよい。これらの中でも、(メタ)アクリロイルオキシ基を複数有する化合物が好ましく、トリメチロールプロパントリ(メタ)アクリレート、ペンタエリスリトールテトラ(メタ)アクリレート、ジペンタエリスリトールヘキサ(メタ)アクリレート、トリス(ヒドロキシエチル)イソシアヌレートのトリ(メタ)アクリレート等の(メタ)アクリロイルオキシ基を3個以上有する化合物がより好ましい。
光重合開始剤(F)は光ラジカル発生剤が好ましく、その具体例としては、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等のベンゾインとそのアルキルエーテル類;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)アセトフェノン等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等のアントラキノン類;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等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等のケタール類;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)ベンゾフェノン等のベンゾフェノン類;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;アシルホスフィンオキサイド類;及びキサントン類等が挙げられる。これらは、単独で用いてもよいし、2種以上を組み合わせて用いてもよい。
本実施形態の感光性着色組成物は、公知の混合装置を用い、上記の各成分を混合することによって製造することができる。例えば、先に顔料分散組成物を調整した後、バインダー樹脂(A-2)、反応性希釈剤(E)、光重合開始剤(F)等を順番に混合することで製造することができる。また、必要に応じて、顔料分散組成物に含まれている溶剤(D-1)以外に、溶剤(D-2)を添加してもよい。その場合、感光性着色組成物に含まれている溶剤(D)が、溶剤(D-1)と溶剤(D-2)とを含む。なお、溶剤(D-2)は、溶剤(D-1)と共通のものを使用してもよく、異なるものでもよい。
次に、本発明の感光性着色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、上記の感光性着色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)が上記の感光性着色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。
本実施形態の画像表示素子は、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。本実施形態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。
下記記載の重量平均分子量とは、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:バインダー樹脂(A-1)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
JIS K6901 5.3.2に従って、バインダー樹脂(A-1)の固形分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数を測定した。
測定器:776 Dosimat(Metrohm社)
混合指示薬:ブロモチモールブルーとフェノールレッドの混合指示薬
エチレン性不飽和基のモル数当たりのバインダー樹脂(A-1)の質量であり、モノマーの使用量に基づいて算出した計算値である。
3級アミノ基及び4級アンモニウムカチオン基のモル数当たりの高分子分散剤(C)の質量であり、モノマーの使用量に基づいて算出した計算値である。計算は、アミン価(JIS K7237等に示す規格に沿って測定された値)の定義に従い、高分子分散剤(C)の固形分1g中に含まれるアミン成分を中和するのに要する水酸化カリウムのmg数として表した。
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、67.2g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(モノマー(m-1a)と(m-2)と(m-3)との合計100質量部に対して50.0質量部)を入れた。その後、窒素ガスで置換しながら撹拌し、120℃に昇温した。次に、16.2gのジシクロペンタニルメタクリレート(m-1a)、26.5gのアクリル酸(m-2)、51.8gのベンジルメタクリレート(m-3)からなるモノマー混合物に、重合開始剤として8.0gのt-ブチルパーオキシ-2-エチルヘキサノエート(モノマー(m-1a)と(m-2)と(m-3)との合計100質量部に対して8.4質量部)を添加したものを滴下ロートから前記フラスコ中に滴下した。滴下終了後、120℃で2時間攪拌して共重合反応を行い、共重合体(P)を得た。
次に、前記フラスコ内をドライエアーに置換した後、15.7gのグリシジルメタクリレート(m-4)、触媒として0.3gのトリフェニルホスフィン(モノマー(m-1a)と(m-2)と(m-3)と(m-4)との合計100質量部に対して0.3質量部)及び重合禁止剤として0.2gのハイドロキノンモノメチルエーテル(モノマー(m-1a)と(m-2)と(m-3)と(m-4)との合計100質量部に対して0.2質量部)を加え、共重合体(P)への付加反応を120℃で5時間攪拌して行った。その後、溶剤として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固形分が40.0%となるように添加し、エチレン性不飽和二重結合と、アルカリ可溶性基としてカルボキシ基を有するバインダー樹脂(A-1)の溶液として試料No.1を得た。
モノマー(m-1a)と(m-2)と(m-3)との合計を100モル%として換算した際の各モノマーの配合割合と、バインダー樹脂(A-1)の重量平均分子量、酸価、不飽和基当量を表1に示した。
表1に記載のモノマーの配合割合とする以外は、合成例1と同様にして、バインダー樹脂(A-1)としての試料No.2、試料No.5~10を得た。各モノマーの配合割合と、バインダー樹脂(A-1)の重量平均分子量、酸価、不飽和基当量を表1に示した。
合成例1と同様にして、共重合体(P)を得た。
次に、前記フラスコ内をドライエアーに置換した後、15.7gのグリシジルメタクリレート(m-4)、触媒として0.3gのトリフェニルホスフィン(モノマー(m-1a)と(m-2)と(m-3)と(m-4)との合計100質量部に対して0.3質量部)及び重合禁止剤として0.2gのハイドロキノンモノメチルエーテル(モノマー(m-1a)と(m-2)と(m-3)と(m-4)との合計100質量部に対して0.2質量部)を加え、共重合体(P)への付加反応を120℃で5時間攪拌して行った。さらに、10.4gの2-イソシアナトエチルアクリレート(m-5)を加え、共重合体(P)への付加反応を100℃で1時間攪拌して行った後、溶剤として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固形分が40.0%となるように添加し、エチレン性不飽和二重結合と、アルカリ可溶性基としてカルボキシ基を有するバインダー樹脂(A-1)の溶液として試料No.3を得た。
モノマー(m-1a)と(m-2)と(m-3)との合計を100モル%として換算した際の各モノマーの配合割合と、バインダー樹脂(A-1)の重量平均分子量、酸価、不飽和基当量を表1に示した。
合成例1と同様にして、共重合体(P)を得た。
次に、前記フラスコ内をドライエアーに置換した後、15.7gのグリシジルメタクリレート(m-4)、触媒として0.3gのトリフェニルホスフィン(モノマー(m-1a)と(m-2)と(m-3)と(m-4)との合計100質量部に対して0.3質量部)及び重合禁止剤として0.2gのハイドロキノンモノメチルエーテル(モノマー(m-1a)と(m-2)と(m-3)と(m-4)との合計100質量部に対して0.2質量部)を加え、共重合体(P)への付加反応を120℃で5時間攪拌して行った。さらに、7.4gの無水コハク酸(m-6)を加え、共重合体(P)への付加反応を120℃で1時間攪拌して行った。その後、溶剤として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固形分が40.0%となるように添加し、エチレン性不飽和二重結合と、アルカリ可溶性基としてカルボキシ基を有するバインダー樹脂(A-1)の溶液として試料No.4を得た。
モノマー(m-1a)と(m-2)と(m-3)との合計を100モル%として換算した際の各モノマーの配合割合と、バインダー樹脂(A-1)の重量平均分子量、酸価、不飽和基当量を表1に示した。
攪拌装置、滴下ロート、コンデンサー、温度計およびガス導入管を備えたフラスコに、133g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、80.5gのイソボルニルメタクリレート及び触媒として13.2gのテトラメチルエチレンジアミンを入れ、フラスコ内を窒素に置換しながら50℃で1時間攪拌した。その後、触媒として9.3gのブロモイソ酪酸エチル及び5.6gの塩化第一銅を入れ、フラスコを110℃に昇温した後4時間重合反応を行った。反応後、溶液をサンプリングし不揮発分を測定し、不揮発分から換算し重合転化率が98%以上であることを確認した後、61g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及び3級アミノ基を有するモノマーとして19.5gのジメチルアミノエチルメタクリレートを加え、さらに110℃で2時間反応を行った。反応後、再度溶液をサンプリングし不揮発分を測定し、不揮発分から換算し重合転化率が98%以上であることを確認した後、溶液を冷却した。最後に、溶剤として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固形分が40.0%となるように添加し、3級アミノ基を有する高分子分散剤(C)の溶液となる試料No.11(アミン価70mgKOH/g、重量平均分子量5500)を得た。
攪拌装置、滴下ロート、コンデンサー、温度計およびガス導入管を備えたフラスコに、133g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、70.0gのイソボルニルメタクリレート及び触媒として13.2gのテトラメチルエチレンジアミンを入れ、フラスコ内を窒素に置換しながら50℃で1時間攪拌した。その後、触媒として9.3gのブロモイソ酪酸エチル及び5.6gの塩化第一銅を入れ、フラスコを110℃に昇温した後4時間重合反応を行った。反応後、溶液をサンプリングし不揮発分を測定し、不揮発分から換算し重合転化率が98%以上であることを確認した後、61g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及び4級アンモニウムカチオン基を有するモノマーとして30.0gのメタクリロイルオキシエチルベンジルジメチルアンモニウムクロライドを加え、さらに110℃で2時間反応を行った。反応後、再度溶液をサンプリングし不揮発分を測定し、不揮発分から換算し重合転化率が98%以上であることを確認した後、溶液を冷却した。最後に、溶剤として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固形分が40.0%となるように添加し、4級アンモニウムカチオン基を有する高分子分散剤(C)の溶液となる試料No.12(アミン価60mgKOH/g、重量平均分子量5000)を得た。
直径0.1mmのジルコニアビーズ(ニッカトー製YTZボール)200gを充填したSUS容器(内径50mm×高さ100mm)に、顔料(B)としてC.I.ピグメントグリーン58(DIC株式会社製Fastogen Green A110)を7.5g、高分子分散剤(C)として3級アミノ基を有する試料No.11又は4級アンモニウムカチオン基を有する試料No.12のいずれか、バインダー樹脂(A-1)として前記試料No.1~No.10のいずれかを表2に示す組成で混合し、溶剤(D-1)として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、ジルコニアビーズを除いた固形分が24%となるように加え、ペイントシェイカー(Red Devil Equipment製Red Devil 5400)で室温下、2時間混合して分散させた。その後、内容物をガラスフィルターで吸引ろ過することにより、顔料分散組成物No.1~7、10~13を得た。
顔料(B)としてC.I.ピグメントグリーン58を9.4g、高分子分散剤(C)としてEFKA-PX4300、バインダー樹脂(A-1)として前記試料No.1、No.6、又はNo.10のいずれかを表2に示す組成で混合した以外は、実施例1と同様にして、顔料分散組成物No.8~9、及び14を得た。
調製した直後の顔料分散組成物の粘度をE型粘度計(東機産業株式会社製RE-80L、測定温度25℃、コーンNo.3、回転数20rpm)で測定することで評価した。また、粘度の測定結果より、顔料分散性及び顔料分散組成物の保存安定性を下記基準により◎、○、×の3段階で評価し、◎及び○を合格とした。評価結果を表2に示した。
◎:6.0mPa・s未満
○:6.0mPa・s以上10.0mPa・s未満
×:10.0mPa・s以上
調製した顔料分散組成物を室温で2週間保管した後の顔料分散組成物の粘度をE型粘度計で測定することで評価した。室温で2週間保管した後の顔料分散組成物の粘度の上昇率を調製した直後と比較し、下記基準により○、△、×の3段階で評価し、○及び△を合格とした。評価結果を表2に示した。
○:10%未満
△:10%以上(室温で1週間保管した後では10%未満)
×:10%以上(室温で1週間保管した後で既に10%以上)
上記合成例1において、16.2gのジシクロペンタニルメタクリレート(m-1a)の代わりに、11.9gのジシクロペンタニルメタクリレート;51.8gのベンジルメタクリレート(m-3)の代わりに、42.7gのベンジルメタクリレート;26.5gのアクリル酸(m-2)の代わりに、20.9gのメタクリル酸;重合開始剤として8.0gのt-ブチルパーオキシ-2-エチルヘキサノエートを代わりに、1.6gのt-ブチルパーオキシ-2-エチルヘキサノエート;15.7gのグリシジルメタクリレート(m-4)を代わりに、11.5gのグリシジルメタクリレートを用いた以外は、合成例1と同様の方法に従い、バインダー樹脂(A-2)の溶液として試料No.13(分子量32000、固形分酸価104mgKOH/g、エチレン性不飽和基当量1100g/mol)を得た。
前記顔料分散組成物No.1~13の固形分を100質量部としたときに、バインダー樹脂(A-2)として前記試料No.13を固形分として80質量部、反応性希釈剤(E)としてジペンタエリスリトールヘキサアクリレートを80質量部、光重合開始剤(F)として1-[9-エチル-6-(2-メチルベンゾイル)-9H-カルバゾール-3-イル-]-,-1-(O-アセチルオキシム)を4質量部混合し、溶剤(D-2)として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、全体の固形分が30%となるように加え、感光性着色組成物No.1~14を調製した。なお、顔料(B)100質量部に対する各成分配合量としては、感光性着色組成物No.1~7、No.10~13では、バインダー樹脂(A-2)が120質量部、反応性希釈剤(E)が120質量部、光重合開始剤(F)が6質量部である。また、感光性着色組成物No.8、No.9及びNo.14では、バインダー樹脂(A-2)が112質量部、反応性希釈剤(E)が112質量部、光重合開始剤(F)が5.6質量部である。
調製した感光性着色組成物と、調整後室温で2週間保管した後の感光性着色組成物の粘度をE型粘度計(東機産業株式会社製RE-80L、測定温度25℃、コーンNo.3、回転数20rpm)で測定することで評価した。室温で2週間保管した後の感光性着色組成物の粘度の上昇率が、調製直後と比較し、下記基準により○(合格)及び×(不合格)の2段階で評価した。評価結果を表3及び表4に示した。
○:10%未満
×:10%以上
感光性着色組成物No.1~7、No.10~13を、5cm角ガラス基板(無アルカリガラス基板)上に、最終の硬化塗膜の平均厚さが2.0μmとなるようにスピンコートした後、100℃で3分間加熱し溶剤を揮発させた。次に塗膜の全面を露光(ランプとして、ウシオ電機株式会社製USH-250BYを使用、露光量40mJ/cm2)させた後、さらに230℃で30分間ベーキングすることで硬化塗膜である緑色カラーレジスト(1)を得た。
感光性着色組成物No.1~7、No.10~13を、5cm角ガラス基板(無アルカリガラス基板)上に、最終の硬化塗膜の平均厚さが2.0μmとなるようにスピンコートした後、100℃で3分間加熱し溶剤を揮発させた。次に、基板上にラインアンドスペースやドットパターンのフォトマスクを設置して塗膜を露光(ランプとして、ウシオ電機株式会社製USH-250BYを使用、露光量40mJ/cm2)し、光硬化させた。その後、0.2質量%の水酸化カリウム水溶液で現像した。さらに230℃で30分間ベーキングすることで硬化塗膜である緑色カラーレジスト(2)を得た。
感光性着色組成物No.1、No.7~9、No.14を、5cm角ガラス基板(無アルカリガラス基板)上に、後述の平均厚さを調整した以外は、緑色カラーレジスト(1)の作製方法と同様にして、硬化塗膜である緑色カラーレジスト(3)を得た。上記平均厚さは、最終の硬化塗膜の色座標が、(株)島津製作所製 分光光度計UV-1650PCを用いてx=0.26±0.005、y=0.45±0.005となるような平均厚さである。
上記緑色カラーレジスト(3)の膜厚を段差計(株式会社小坂研究所製ET4000M)で測定した。膜厚を下記基準により◎、○、×の3段階で評価し、◎及び○を合格とした。評価結果を表4に示した。
◎:膜厚1.9μm未満
○:膜厚1.9~2.1μm
×:膜厚2.1μm以上
上記緑色カラーレジスト(1)及び(3)の525nmにおける透過率を、(株)島津製作所製 分光光度計UV-1650PCを用いて測定した。透過率95.0%以上を○(合格)、94.9%以下を×(不合格)とし、測定結果を表3及び表4に示した。
上記緑色カラーレジスト(1)の全面を60℃又は80℃のN-メチルピロリドンに3分間浸漬させた。その後、緑色カラーレジストを取り出し、空気乾燥させた。緑色カラーレジスト全面の剥がれ具合を目視で確認することで、剥がれの有無で感光性着色組成物の耐溶剤性を下記基準により◎、○、×の3段階で評価し、◎及び○を合格とした。評価結果を表3に示した。
◎:60℃及び80℃で一カ所も剥がれ無し
○:80℃では一カ所以上の剥がれが見られたが、60℃では一カ所も剥がれ無し
×:60℃及び80℃で一カ所以上の剥がれが見られた
現像性試験は、現像速度とパターン形状の2つを評価した。
現像速度については、上記緑色カラーレジスト(2)の現像工程において、0.2質量%の水酸化カリウム水溶液での現像中、パターンが見え終わるまでに掛かる時間を測定し、下記基準により◎、○、×の3段階で評価し、◎及び○を合格とした。評価結果を表3に示した。
◎:40秒未満
○:40秒以上80秒未満
×:80秒以上
○:端面形状が良い(逆テーパー形状ではない)
×:端面が逆テーパー形状となる
特に、実施例4及び13では、実施例1及び10と比べ側鎖に多くのエチレン性不飽和基を導入したバインダー樹脂(A-1)を用いたことで、大変優れた感光性着色組成物の耐溶剤性が得られた。しかし、一方、実施例5及び14では、実施例1及び10と比べ側鎖に多くのカルボン酸を導入したバインダー樹脂(A-1)を用いたことで、大変優れた感光性着色組成物の現像性が得られた。
Claims (13)
- バインダー樹脂(A-1)と、
顔料(B)と、
高分子分散剤(C)と、
溶剤(D-1)と、
を含有し、
前記バインダー樹脂(A-1)が、樹脂(A-1a)及び樹脂(A-1b)からなる群から選択される少なくとも1種の樹脂であり、
前記樹脂(A-1a)は、炭素数10~20の橋かけ環式炭化水素基を有する重合性モノマー(m-1a)(但し、重合性モノマー(m-1b)を除く)及び下記式(1)で示される重合性モノマー(m-1b)からなる群から選択される少なくとも一種の重合性モノマー(m-1)と、アクリル酸(m-2)と、芳香環含有重合性モノマー(m-3)とを含むモノマー(M)の共重合体(P)のカルボキシ基の一部にカルボキシ基と反応性を有する基を有するエチレン性不飽和基含有化合物(m-4)が付加した樹脂であり、
前記樹脂(A-1b)は、前記樹脂(A-1a)において、前記エチレン性不飽和基含有化合物(m-4)がエポキシ基又はオキセタニル基を有するモノマーであり、それらの開環付加により生じるヒドロキシ基の一部にイソシアナト基を有するエチレン性不飽和基含有化合物(m-5)及び多塩基酸無水物(m-6)から選択される一種以上が付加した樹脂である
ことを特徴とする顔料分散組成物。
- 前記顔料(B)が、ハロゲン化フタロシアニン骨格を有する顔料を含む請求項1に記載の顔料分散組成物。
- 前記高分子分散剤(C)が、3級アミノ基及び4級アンモニウムカチオン基からなる群から選択される少なくとも1種の基を有する請求項1または2に記載の顔料分散組成物。
- 前記高分子分散剤(C)が、
3級アミノ基とエチレン性不飽和基を有するモノマー、及び4級アンモニウムカチオン基とエチレン性不飽和基を有するモノマーからなる群から選択される少なくとも1種のモノマーと、
他のエチレン性不飽和基を有するモノマーと
のブロック重合物であることを特徴とする、請求項1~3のいずれか一項に記載の顔料分散組成物。 - 前記エチレン性不飽和基含有化合物(m-4)が有するカルボキシ基と反応性を有する基が、エポキシ基又はオキセタニル基である請求項1~4のいずれか一項に記載の顔料分散組成物。
- 前記共重合体(P)の前記重合性モノマー(m-1)、前記アクリル酸(m-2)、前記芳香族含有重合性モノマー(m-3)の合計を100モル%とした場合に、前記芳香族含有重合性モノマー(m-3)の割合が9~70モル%であることを特徴とする、請求項1~5のいずれか一項に記載の顔料分散組成物。
- 前記バインダー樹脂(A-1)が、前記樹脂(A-1b)である請求項1~6のいずれか一項に記載の顔料分散組成物。
- 前記顔料(B)100質量部に対して、
前記バインダー樹脂(A-1)を10~50質量部を含有し、
前記高分子分散剤(C)を10~80質量部を含有する
請求項1~7のいずれか一項に記載の顔料分散組成物。 - 請求項1~8のいずれか一項に記載の顔料分散組成物と、
バインダー樹脂(A-2)と、
反応性希釈剤(E)と、
光重合開始剤(F)と
を含有することを特徴とする感光性着色組成物。 - 前記顔料(B)100質量部に対して、
前記バインダー樹脂(A-1)と(A-2)との合計を50~280質量部含有し、
前記高分子分散剤(C)を10~80質量部を含有し、
前記反応性希釈剤(E)を40~200質量部含有し、
前記光重合開始剤(F)を0.1~10質量部含有する請求項9に記載の感光性着色組成物。 - 請求項9または10に記載の感光性着色組成物を硬化させてなる樹脂硬化膜。
- 請求項9または10に記載の感光性着色組成物の硬化物を有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画像表示素子。
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CN202180073365.5A CN116490533A (zh) | 2020-11-13 | 2021-10-21 | 颜料分散组合物和感光性着色组合物 |
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JP2002293837A (ja) * | 2001-03-30 | 2002-10-09 | Dainippon Printing Co Ltd | 硬化性樹脂及びその製造方法 |
JP2005345521A (ja) * | 2004-05-31 | 2005-12-15 | Toppan Printing Co Ltd | 硬化性樹脂組成物及びそれを用いて形成したフォトスペーサを有するカラーフィルタ |
JP2007137947A (ja) * | 2005-11-15 | 2007-06-07 | Nof Corp | 光硬化性樹脂組成物、およびこれを用いた液晶表示素子または固体撮像素子用の部材 |
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JP5617177B2 (ja) * | 2009-03-27 | 2014-11-05 | 東洋インキScホールディングス株式会社 | カラーフィルタ用着色組成物及びカラーフィルタ |
KR102131590B1 (ko) * | 2016-12-02 | 2020-07-08 | 미쯔비시 케미컬 주식회사 | 착색 감광성 수지 조성물, 안료 분산액, 격벽, 유기 전계 발광 소자, 화상 표시 장치 및 조명 |
JP6403357B1 (ja) | 2017-12-21 | 2018-10-10 | 昭和電工株式会社 | 樹脂組成物、感光性樹脂組成物、樹脂硬化膜、画像表示素子およびカラーフィルター |
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JP2002293837A (ja) * | 2001-03-30 | 2002-10-09 | Dainippon Printing Co Ltd | 硬化性樹脂及びその製造方法 |
JP2005345521A (ja) * | 2004-05-31 | 2005-12-15 | Toppan Printing Co Ltd | 硬化性樹脂組成物及びそれを用いて形成したフォトスペーサを有するカラーフィルタ |
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KR20230076845A (ko) | 2023-05-31 |
CN116490533A (zh) | 2023-07-25 |
TW202235514A (zh) | 2022-09-16 |
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