WO2014141731A1 - ブロックイソシアナト基含有ポリマー、該ポリマーを含む組成物及びその用途 - Google Patents
ブロックイソシアナト基含有ポリマー、該ポリマーを含む組成物及びその用途 Download PDFInfo
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- WO2014141731A1 WO2014141731A1 PCT/JP2014/050435 JP2014050435W WO2014141731A1 WO 2014141731 A1 WO2014141731 A1 WO 2014141731A1 JP 2014050435 W JP2014050435 W JP 2014050435W WO 2014141731 A1 WO2014141731 A1 WO 2014141731A1
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
- C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
- C08F299/06—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polyurethanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/81—Unsaturated isocyanates or isothiocyanates
- C08G18/8108—Unsaturated isocyanates or isothiocyanates having only one isocyanate or isothiocyanate group
- C08G18/8116—Unsaturated isocyanates or isothiocyanates having only one isocyanate or isothiocyanate group esters of acrylic or alkylacrylic acid having only one isocyanate or isothiocyanate group
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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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
- G03F7/09—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers
- G03F7/105—Photosensitive materials characterised by structural details, e.g. supports, auxiliary layers having substances, e.g. indicators, for forming visible images
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
Definitions
- the present invention relates to a novel curable polymer containing a block isocyanate group and use thereof, and more specifically, a curable polymer suitable as a photosensitive material for a color filter, a polymer composition containing the curable polymer, Photosensitive polymer composition in which photopolymerization initiator is blended with polymer composition, color filter formed from the photosensitive polymer composition, method for producing the color filter, and image comprising the color filter
- the present invention relates to a display element.
- photosensitive polymer compositions that can be cured by active energy rays such as ultraviolet rays and electron beams have been widely used in the fields of various coatings, printing, paints, adhesives and the like from the viewpoint of resource saving and energy saving.
- active energy rays such as ultraviolet rays and electron beams
- photosensitive polymer compositions that can be cured by active energy rays are used for solder resists, color filter resists, and the like.
- the color filter generally includes a transparent substrate such as a glass substrate, red (R), green (G) and blue (B) pixels formed on the transparent substrate, a black matrix formed at the pixel boundary, It is comprised from the protective film formed on a pixel and a black matrix.
- a color filter having such a configuration is usually manufactured by sequentially forming a black matrix, a pixel, and a protective film on a transparent substrate.
- the pixel and the black matrix are referred to as “colored pattern”.
- a pigment / dye dispersion method created by a photolithography method using a photosensitive polymer composition as a resist and repeating coating, exposure, development and baking is excellent in durability such as light resistance and heat resistance, Since it gives a colored pattern with few defects such as pinholes, it is the current mainstream.
- a photosensitive polymer composition used in a photolithography method contains an alkali-soluble resin, a reactive diluent, a photopolymerization initiator, a colorant, and a solvent. While the pigment / dye dispersion method has the above-mentioned advantages, the pattern of black matrix, R, G, and B is repeatedly formed, so that the alkali-soluble resin that is the binder of the coating film has high thermal decomposition resistance and heat resistance. Yellowing is required.
- a photosensitive polymer composition having superior heat decomposability and heat yellowing resistance is obtained as compared with a resin having a conventionally known maleimide-containing monomer as a copolymerization component.
- the copolymer preferably contains a carboxyl group in the molecule and has an acid value of 20 to 300 KOH mg / g (see claim 2 of Patent Document 1), and further, an unsaturated group in the molecule. (Refer to claim 3 of Patent Document 1).
- the photosensitive polymer composition prepared using this copolymer is capable of obtaining a pattern exhibiting excellent performance when the coating film after alkali development is baked at a high temperature such as 230 ° C.
- the solvent resistance of the pattern to be formed is not sufficient, and as a result, it cannot be said that the obtained color filter has sufficient reliability.
- a dye when used as a colorant, it is expected that a colored pattern having higher luminance than that obtained when a pigment is used is obtained. When used, the performance expected of the original dye-based color filter material could often not be obtained.
- a photosensitive polymer composition containing a polymer (a) having a structural unit derived from a block isocyanate compound, a photopolymerizable monomer (b), and a photopolymerization initiator (c) is a resin. It is reported that the adhesion of the pattern to the substrate is excellent (Patent Document 3). It is described that the polymer (a) preferably contains an acid group in the molecule, and thereby can have good developability (see paragraph 0024). However, although this material is excellent in terms of adhesion of the resin pattern to the substrate, there is a problem that developability is difficult when the exposure amount is small.
- the present invention has been made in order to solve the above-described problems.
- the main object of the present invention is that when used as a material for a photosensitive polymer composition, the sensitivity and developability are good, and the pattern It is an object of the present invention to provide a novel curable polymer having sufficient solvent resistance even when the baking temperature at the time of formation is lowered.
- Another object is to provide a polymer composition capable of forming a coating film excellent in solvent resistance.
- a photosensitive polymer composition suitable as a material for a color filter which has good sensitivity and developability and can form a pattern with excellent solvent resistance even when the baking temperature is lowered. It is to provide a highly reliable color filter and a method for producing the same, and to provide an image display element including the color filter.
- an acid group, a polymerizable unsaturated group and a block isocyanate group are contained in the molecule, and the weight average molecular weight in terms of polystyrene is 1,000 to 50,000.
- Certain curable polymers are provided.
- a polymer composition containing the curable polymer (A), a solvent (B) and an optional reactive diluent (C) is provided.
- a photosensitive polymer composition containing the curable polymer (A), a solvent (B), a reactive diluent (C), a photopolymerization initiator (D), and a colorant (E) optionally added.
- a color filter formed using the photosensitive polymer composition is provided.
- the photosensitive material containing a coloring material is applied to a substrate and exposed through a mask.
- a method for producing a color filter is provided in which a pattern is formed by alkali development and then baked at a temperature of 210 ° C. or lower.
- an image display device comprising the color filter is provided.
- a curable polymer having good sensitivity and developability and capable of forming a cured coating film having sufficient solvent resistance even when the baking temperature during pattern formation is low, and the curing A photosensitive polymer composition containing a photopolymer is obtained.
- the cured coating film formed from the photosensitive polymer composition of the present invention has excellent sensitivity and developability, and also has excellent solvent resistance, and thus has an extremely high utility value in various resist fields.
- a color filter having a colored pattern excellent in solvent resistance can be obtained.
- the crosslinking reaction proceeds sufficiently even when the baking temperature is lowered, it is possible to use even a coloring material having difficulty in heat resistance, and energy consumption can be reduced.
- the curable polymer of the present invention contains an acid group, a polymerizable unsaturated group and a block isocyanate group in the molecule, and has a polystyrene-equivalent weight average molecular weight of 1,000 to 50,000.
- this polymer since the polymerizable unsaturated group which exists in a polymer molecule contributes to the crosslinking reaction between polymers, this polymer is called "curable polymer.”
- the structure of the curable polymer is not particularly limited as long as it contains an acid group, a polymerizable unsaturated group and a block isocyanate group in the molecule.
- the following (a) polymerized units of a block isocyanate group-containing monomer are used.
- (I) Unsaturation containing functional group reactive to acid group in copolymer of (a) block isocyanate group-containing monomer, (b) unsaturated acid monomer, and (d) other monomer optionally used A modified polymer in which a monomer is reacted to introduce a polymerizable unsaturated bond into a side chain.
- the curable polymer represented by the above (I) is obtained by copolymerizing (a) a block isocyanate group-containing monomer, (b) an unsaturated acid monomer, and (d) other monomers used as required according to a conventional method. After producing the precursor of the curable polymer, (b) the unsaturated acid monomer-derived acid group is reacted with an unsaturated monomer having a functional group reactive with the acid group to form a polymerizable unsaturated bond on the side chain. Can be obtained.
- the block isocyanato group-containing monomer used in the production of the copolymer is a block agent that isocyanato groups in isocyanate compounds having reactive ethylenically unsaturated groups such as vinyl groups and (meth) acryloyloxy groups in the molecule. It is a blocked compound.
- a preferable isocyanate compound a compound represented by the following formula (1) can be exemplified.
- R 1 represents a hydrogen atom or a methyl group
- R 2 represents —CO—, —COOR 3 —
- R 3 represents an alkylene group having 2 to 6 carbon atoms
- R 4 is an alkylene group having 2 to 6 carbon atoms
- R 5 is an alkylene or arylene group having 2 to 12 carbon atoms which may have a substituent. .
- R 2 is preferably —COOR 3 —, and particularly preferably R 3 is an alkylene group having 1 to 4 carbon atoms.
- isocyanate compound represented by the above formula (1) examples include 2-isocyanatoethyl (meth) acrylate, 2-isocyanatopropyl (meth) acrylate, 3-isocyanatopropyl (meth) acrylate, 2 -Isocyanato-1-methylethyl (meth) acrylate, 2-isocyanato-1,1-dimethylethyl (meth) acrylate, 4-isocyanatocyclohexyl (meth) acrylate, methacryloyl isocyanate and the like.
- a 1: 1 reaction product of 2-hydroxyalkyl (meth) acrylate (the alkyl group is preferably an ethyl group or an n-propyl group, and particularly preferably an ethyl group) and a diisocyanate compound can also be used.
- diisocyanate compound examples include hexamethylene diisocyanate, 2,4- (or 2,6-) tolylene diisocyanate (TDI), 4,4′-diphenylmethane diisocyanate (MDI), 3,5,5-trimethyl-3- Examples include isocyanatomethylcyclohexyl isocyanate (IPDI), m- (or p-) xylene diisocyanate, 1,3- (or 1,4-) bis (isocyanatomethyl) cyclohexane, lysine diisocyanate, and the like.
- IPDI isocyanatomethylcyclohexyl isocyanate
- m- (or p-) xylene diisocyanate 1,3- (or 1,4-) bis (isocyanatomethyl) cyclohexane, lysine diisocyanate, and the like.
- (meth) acrylate particularly 2-isocyanatoethyl (meth), in which R 3 in the above formula (1) is an alkylene group having 1 to 4 carbon atoms because of excellent alkali developability and availability.
- R 3 in the above formula (1) is an alkylene group having 1 to 4 carbon atoms because of excellent alkali developability and availability.
- Acrylate and 2-isocyanatopropyl (meth) acrylate are preferred.
- (meth) acrylate in this specification means that either acrylate or methacrylate may be used, and (meth) acrylic acid may be expressed using either acrylic acid or methacrylic acid. Means.
- the blocking agent examples include lactams such as ⁇ -caprolactam, ⁇ -valerolactam, ⁇ -butyrolactam, ⁇ -propiolactam; methanol, ethanol, propanol, butanol, ethylene glycol, methyl cellosolve, butyl cellosolve, methyl carbitol, Alcohols such as benzyl alcohol, phenyl cellosolve, furfuryl alcohol, cyclohexanol; butylphenols such as phenol, cresol, xylenol, ethylphenol, o-isopropylphenol, p-tert-butylphenol, p-tert-octylphenol, nonylphenol, dinonylphenol , Styrenated phenol, oxybenzoate, thymol, p-naphthol, p-nitrophenol, p-chloroph Phenols such as diol; active methylenes
- Imine series such as formaldoxime, acetaldoxime, acetoxime, methyl ethyl ketoxime, methylisobutyl ketoxime, cyclohexanone oxime; bisulfite series such as sodium bisulfite and potassium bisulfite.
- blocking agents may be used alone or in combination of two or more.
- lactam-based and alcohol-based blocking agents are preferable, and ⁇ -caprolactam and 1-methoxy-2-propanol (that is, propylene glycol monomethyl ether) are particularly preferable.
- the blocking group protects the highly reactive isocyanato group, but the blocking group is eliminated by heating, and the isocyanato group appears.
- the isocyanate group reacts with a reactive functional group contained in the curable polymer or reactive diluent (that is, an acid group, a hydroxy group, an amino group, or the like, if desired), and has a high crosslinking density. Form a cured product.
- Preferred blocked isocyanate compounds are those having a dissociation temperature of 100 ° C. to 200 ° C., further 140 ° C. to 190 ° C., particularly 150 ° C. to 180 ° C. Specific examples of such compounds are shown by the following formula (2).
- Methacryloyloxyethyl isocyanate that is, a reaction product of 2-isocyanatoethyl methacrylate and ⁇ -caprolactam (dissociation temperature of 160 ° C.), methacryloyloxyethyl isocyanate represented by the following formula (3) and propylene glycol monomethyl ether: Reaction product (dissociation temperature 160 ° C.), Karenz MOI-BM (reaction product of methacroyloxyethyl isocyanate and methyl ethyl ketoxime, manufactured by Showa Denko KK, dissociation temperature 130 ° C.), Karenz MOI-BP (methacloyloxyethyl) With isocyanate 5- reaction product of dimethyl pyrazole, manufactured by Showa Denko KK, methacrylates such as dissociation temperature 110 ° C.), such as acrylates corresponding to these are exemplified.
- the dissociation temperature of the blocked isocyanate compound was adjusted by adding an n-octanol solution having a compound concentration of 20% by mass, and adding 1% by mass of dibutyltin laurate and 3% by mass of phenothiazine (polymerization inhibitor). Then, the mixture was heated at a predetermined temperature, and the reduction rate of the compound after 30 minutes was measured by HPLC analysis. The temperature at which the reduction rate was 80% or more was defined as the dissociation temperature.
- the dissociation temperature of the blocked isocyanate compound When the dissociation temperature of the blocked isocyanate compound is excessively low, the storage stability of the polymer to be produced is lowered, and an unintended crosslinking reaction is likely to occur during the modification reaction described later. Conversely, when the dissociation temperature is excessively high, the baking temperature is decreased. If the dissociation temperature is not exceeded, it becomes difficult to improve the solvent resistance of the cured coating film.
- the reaction between the isocyanate compound and the blocking agent can be performed regardless of the presence or absence of a solvent.
- a solvent it is necessary to use a solvent inert to the isocyanato group.
- organometallic salts such as tin, zinc and lead, tertiary amines and the like may be used as a catalyst.
- the reaction can be generally carried out at ⁇ 20 to 150 ° C., but is preferably carried out at 0 to 100 ° C.
- the unsaturated acid monomer (b) used in the production of the copolymer may be any monomer having a polymerizable unsaturated bond and an acid group, such as an unsaturated carboxylic acid or an anhydride thereof, an unsaturated sulfonic acid, Examples thereof include unsaturated phosphonic acid.
- preferred unsaturated acid monomers include (meth) acrylic acid, ⁇ -bromo (meth) acrylic acid, ⁇ -furyl (meth) acrylic acid, crotonic acid, propiolic acid, cinnamic acid, ⁇ -cyanocinnamic acid, Unsaturated carboxylic acids such as maleic acid, maleic anhydride, monomethyl maleate, monoethyl maleate, monoisopropyl maleate, fumaric acid, itaconic acid, itaconic anhydride, citraconic acid, citraconic anhydride, or anhydrides thereof; 2-acrylamide Examples include unsaturated sulfonic acids such as -2-methylpropane sulfonic acid, tert-butylacrylamide sulfonic acid, and p-styrene sulfonic acid; unsaturated phosphonic acids such as vinyl phosphonic acid, and the like.
- (meth) acrylic acid is preferable. These monomers may be used independently and may be used in combination of 2 or more type.
- a block isocyanate group-containing monomer and (b) an unsaturated acid monomer can be used in combination with (d) another monomer copolymerizable therewith.
- D Specific examples of other monomers include styrene, ⁇ -methylstyrene, o-vinyltoluene, m-vinyltoluene, p-vinyltoluene, o-chlorostyrene, m-chlorostyrene, p-chlorostyrene, o Aromatic vinyl compounds such as methoxystyrene, m-methoxystyrene, p-methoxystyrene, p-nitrostyrene, p-cyanostyrene, p-acetylaminostyrene;
- (Meth) acrylic acid amide (meth) acrylic acid N, N-dimethylamide, (meth) acrylic acid N, N-diethylamide, (meth) acrylic acid N, N-dipropylamide, (meth) acrylic acid N, (Meth) acrylic amides such as N-di-isopropylamide, (meth) acrylic acid anthracenyl amide; Vinyl compounds such as (meth) acrylic acid anilide, (meth) acrylonitrile, acrolein, vinyl chloride, vinylidene chloride, vinyl fluoride, vinylidene fluoride, N-vinyl pyrrolidone, vinyl pyridine, vinyl acetate, vinyl toluene; Unsaturated dicarboxylic acid diesters such as diethyl citraconic acid, diethyl maleate, diethyl fumarate, diethyl itaconate; Monomaleimides such as N-phenylmaleimide, N-cyclohexy
- aromatic vinyl compounds and cyclic olefins are preferably used.
- aromatic vinyl compound is copolymerized, heat resistance and pigment dispersibility are improved, and when a cyclic olefin is copolymerized, heat resistance, yellowing resistance and pigment dispersibility are improved.
- the ratio of the (a) block isocyanate group-containing monomer, (b) unsaturated acid monomer, and (d) other monomer used in the production of the precursor is usually (a) a block isocyanate group-containing monomer from 1 to 50 mol%, preferably 3 to 40 mol%, more preferably 5 to 20 mol%, and (b) 20 to 90 mol%, preferably 30 to 70 mol%, more preferably, unsaturated acid monomer. Is 40 to 60 mol%, and (d) the other monomer is 0 to 79 mol%, preferably 5 to 67 mol%, more preferably 20 to 55 mol%.
- the copolymerization reaction of (a) a block isocyanate group-containing monomer, (b) an unsaturated acid monomer and (d) other monomer used as desired is carried out in the presence of a polymerization solvent in accordance with a radical polymerization method known in the art. Or it can be performed in the absence.
- these monomers may be dissolved in a solvent, if desired, and a polymerization initiator may be added to the solution, and the polymerization reaction may be carried out at 50 to 130 ° C. for 1 to 20 hours.
- the isocyanato group generated by the dissociation reacts with the acid group to form a gel, so that the temperature is lower than the dissociation temperature of the block isocyanate group, preferably
- the polymerization is preferably performed at a temperature lower than the dissociation temperature by about 20 to 50 ° C.
- Solvents that can be used in this copolymerization reaction are not particularly limited.
- ethers such as diethylene glycol dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, tetrahydrofuran; Ketones such as methyl ethyl ketone, cyclohexanone, 2-heptanone, 3-heptanone; Methyl 2-hydroxypropionate, ethyl 2-hydroxypropionate, methyl 2-hydroxy-2-methylpropionate, ethyl 2-hydroxy-2-methylpropionate, methyl 3-methoxypropionate, ethyl 3-methoxypropionate, Methyl 3-ethoxypropionate, ethyl 3-ethoxypropionate, ethyl ethoxyacetate, ethyl hydroxyacetate, methyl 2-hydroxy-3-methylbutyrate, 3-methyl-3-methoxybutyl acetate, 3-methyl-3-methoxybutyl acetate, 3-methyl-3-methoxybutyl Propionate,
- (poly) alkylene glycol monoalkyl ether solvents such as propylene glycol monomethyl ether and (poly) alkylene glycol monoalkyl ether acetate solvents such as propylene glycol monomethyl ether acetate, that is, glycol ether solvents are preferable.
- the amount of the polymerization solvent used is not particularly limited, but is generally 30 to 1,000 parts by mass, preferably 50 to 800 parts by mass when the total amount of monomers charged is 100 parts by mass.
- the amount of the solvent used is 1,000 parts by mass or less, a decrease in the molecular weight of the copolymer due to chain transfer action can be suppressed, and the viscosity of the copolymer can be controlled within an appropriate range.
- the blending amount of the solvent to 30 parts by mass or more, an abnormal polymerization reaction can be prevented, the polymerization reaction can be stably performed, and the coloring and gelation of the copolymer can also be prevented. .
- the polymerization initiator that can be used for the copolymerization reaction is not particularly limited, and examples thereof include azobisisobutyronitrile, azobisisovaleronitrile, benzoyl peroxide, t-butylperoxy-2- Examples include ethyl hexanoate. These can be used alone or in combination of two or more.
- the amount of the polymerization initiator used is generally 0.5 to 20 parts by mass, preferably 1.0 to 10 parts by mass, when the total amount of monomers charged is 100 parts by mass.
- the addition copolymer thus produced is used as a precursor of the curable polymer (I).
- This precursor contains an acid group derived from (b) an unsaturated acid monomer, and (c) an unsaturated monomer having a functional group reactive with the acid group is reacted with this acid group to form a side chain.
- the target acid group, polymerizable unsaturated group and block isocyanate group are contained in the molecule, and the weight average molecular weight in terms of polystyrene is 1,000 to 50, A curable polymer (I) of 000 can be obtained.
- the presence of a polymerizable unsaturated bond in the molecule greatly improves the sensitivity and developability when this curable polymer is used as a photosensitive material for a color filter.
- Preferred examples of the unsaturated monomer having a functional group reactive with the acid group (c) subjected to this reaction are unsaturated compounds having a functional group such as an epoxy group, a hydroxy group, an amino group, and a vinyl ether group, Specific examples thereof include glycidyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate having an alicyclic epoxy, and a lactone adduct thereof (for example, Cyclomer A200, M100 manufactured by Daicel Chemical Industries, Ltd.), Mono (meth) acrylate of 3,4-epoxycyclohexylmethyl-3 ', 4'-epoxycyclohexanecarboxylate, epoxidized product of dicyclopentenyl (meth) acrylate, epoxidized product of dicyclopentenyloxyethyl (meth) acrylate Radicals with epoxy groups such as Compatible monomers: 2-hydroxyethyl (meth)
- the reaction between the above precursor and (c) an unsaturated monomer having a functional group reactive with an acid group can be carried out according to a conventional method.
- both components are added to the reaction solvent, a polymerization inhibitor and a catalyst are further added, and the reaction is performed at a temperature at which the block isoanato group in the precursor does not dissociate, for example, 50 to 150 ° C., preferably 80 to 130 ° C. Can be done.
- a temperature at which the block isoanato group in the precursor does not dissociate for example, 50 to 150 ° C., preferably 80 to 130 ° C. Can be done.
- the modification reaction can be performed without removing the solvent after the copolymerization reaction is completed.
- a polymerization inhibitor is added as necessary to prevent gelation.
- a polymerization inhibitor For example, hydroquinone, methyl hydroquinone, hydroquinone monomethyl ether, etc. are mentioned.
- the catalyst is not particularly limited, and examples thereof include tertiary amines such as triethylamine, quaternary ammonium salts such as triethylbenzylammonium chloride, phosphorus compounds such as triphenylphosphine, and chelate compounds of chromium. Can be mentioned.
- a curable polymer (I) having a weight average molecular weight in terms of polystyrene of 1,000 to 50,000, preferably 3,000 to 40,000 can be obtained. If this molecular weight is less than 1,000, chipping of a colored pattern is likely to occur after alkali development when used as a photosensitive polymer composition. Conversely, if the molecular weight exceeds 50,000, the development time becomes longer. It will be too short to be practical.
- the acid value (JIS K6901 5.3) of the curable polymer can be selected as appropriate, but when used as a photosensitive polymer, it is usually in the range of 20 to 300 KOHmg / g, preferably 30 to 200 KOHmg / g. It is.
- the acid value is less than 20 KOHmg / g, the alkali developability as a photosensitive polymer may be lowered.
- the acid value exceeds 300 KOHmg / g, the exposed portion (photocured portion) is easily dissolved in the alkali developer, and the pattern shape may be insufficient.
- the unsaturated group equivalent of the curable polymer (I) is not particularly limited, but is usually in the range of 100 to 4,000 g / mol, preferably 300 to 2,000 g / mol.
- the unsaturated group equivalent is 100 g / mol or more, it is more effective for enhancing the physical properties of the coating film and the alkali developability.
- the unsaturated group equivalent is less than 4,000 g / mol, the sensitivity is further improved. It is effective.
- the unsaturated bond equivalent is the mass of the polymer per 1 mol of unsaturated bonds in the polymer, and can be determined by dividing the mass of the polymer by the amount of unsaturated bonds in the polymer (g / Mol). In the present invention, the unsaturated bond equivalent is a theoretical value calculated from the amount of raw materials used for introducing unsaturated bonds.
- the curable polymer (I) of the present invention contains a block isocyanate group in the molecule.
- the content of the block isocyanato group may be selected as appropriate, but is usually selected in such a range that the block isocyanato group equivalent is 400 to 6,000, preferably 1,000 to 5,000.
- the block isocyanate group equivalent is the mass of the polymer per 1 mol of the block isocyanato group contained in the polymer, and is obtained by dividing the mass of the polymer by the number of moles of the block isocyanato group contained in the polymer. Is possible (g / mol).
- the block isocyanato group equivalent is a theoretical value calculated from the charged amount of the block isocyanato group-containing monomer.
- the curable polymer represented by (II) includes (a) a block isocyanate group-containing monomer, (c) an unsaturated monomer having a functional group reactive with an acid group, and (d) other monomers used as required.
- the method for producing the precursor is the same as that for the curable polymer (I).
- an unsaturated monobasic acid and (f) a polybasic acid or an anhydride thereof By reacting the obtained precursor with (e) an unsaturated monobasic acid and (f) a polybasic acid or an anhydride thereof, an acid group and a polymerizable unsaturated bond are formed.
- the unsaturated monobasic acid used here may be exemplified as the (b) unsaturated acid monomer used in the production of the curable polymer (I), and (f) the polybasic acid or its anhydride is (B) Not only unsaturated polybasic acids and anhydrides exemplified as unsaturated acid monomers, but also unsaturated polybasic acids and anhydrides having no polymerizability, saturated polybasic acids and anhydrides thereof Good.
- Such compounds include malonic acid, succinic acid, glutaric acid, adipic acid, tetrahydrophthalic acid, methyltetrahydrophthalic acid, hexahydrophthalic acid, 5-norbornene-2,3-dicarboxylic acid, methyl-5- Examples thereof include dibasic acids such as norbornene-2,3-dicarboxylic acid and phthalic acid, tribasic acids such as trimellitic acid, tetrabasic acids such as pyromellitic acid, and anhydrides thereof. Of these, dicarboxylic acid anhydride is preferably used.
- the precursor is a copolymer of an unsaturated monomer having an epoxy group
- (e) by reacting with an unsaturated monobasic acid the epoxy group in the molecule is cleaved and an unsaturated bond is introduced into the side chain.
- a hydroxy group is formed.
- an acid group is introduced.
- the precursor is a copolymer of an unsaturated monomer having a hydroxy group
- the side chain can be obtained by reacting the hydroxy group with (e) an unsaturated monobasic acid and (f) a polybasic acid or an anhydride thereof. It is possible to introduce an unsaturated group and an acid group.
- modification reactions may be carried out in accordance with conventional methods. For example, both components are added to a reaction solvent, a polymerization inhibitor and a catalyst are added, and at a temperature at which the block isocyanate group in the precursor is not dissociated, for example, 50
- the reaction may be performed at ⁇ 150 ° C., preferably 80 ° C. to 130 ° C.
- a curable polymer containing the target acid group, polymerizable unsaturated group and block isocyanate group in the molecule and having a polystyrene-equivalent weight average molecular weight of 1,000 to 50,000 ( II) can be obtained.
- the ranges of the weight average molecular weight, acid value, and unsaturated bond equivalent of the curable polymer (II) are the same as those of the curable polymer (I).
- the curable polymer in the present invention is typified by the modified polymers of the above (I) and (II), but if it contains an acid group, a polymerizable unsaturated group and a block isocyanate group, it depends on its production method. It is not limited.
- the target curable polymer can also be obtained by the following method.
- a polymer composition containing a solvent (B) and optionally a reactive diluent (C) in addition to the curable polymer (A).
- the solvent (B) is not particularly limited as long as it is an inert solvent that does not react with the curable polymer (A), and a solvent having the same category as the solvent used in producing the curable polymer (A) may be used. it can. Specific examples thereof are as described above.
- (poly) alkylene glycol monoalkyl ether solvents such as propylene glycol monomethyl ether and (poly) alkylene glycol monoalkyl ether acetate solvents such as propylene glycol monomethyl ether acetate, That is, a glycol ether solvent is used.
- the polymer composition of the present invention can be prepared by appropriately mixing the desired solvent (B) with the curable polymer (A) isolated from the polymerization system, but the curable polymer (A) is not necessarily polymerized.
- the solvent contained at the end of the copolymerization reaction can be used as it is, and a desired solvent can be further added as necessary.
- the solvent contained in the other component used when preparing a polymer composition can also be used as a component of a solvent (B).
- the reactive diluent (C) is a compound having at least one polymerizable ethylenically unsaturated group as a polymerizable functional group in the molecule, and preferably has a plurality of polymerizable functional groups.
- a reactive diluent is not necessarily an essential component of the polymerizable composition, but when used in combination with the curable polymer (A), the strength of the cured product formed and the adhesion to the substrate are improved. Can be improved.
- Monofunctional monomers used as reactive diluents include (meth) acrylamide, methylol (meth) acrylamide, methoxymethyl (meth) acrylamide, ethoxymethyl (meth) acrylamide, propoxymethyl (meth) acrylamide, butoxymethoxymethyl (meth) ) Acrylamide, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4 -Hydroxybutyl (meth) acrylate, 2-phenoxy-2-hydroxypropyl (meth) acrylate, 2- (meth) acryloyloxy-2-hydroxypropyl phthalate, glycerol mono (Meth) acrylate, tetrahydrofurfuryl (meth) acrylate,
- the blending amounts of the curable polymer (A), the solvent (B), and the reactive diluent (C) in the polymer composition may be appropriately selected according to the purpose of use.
- C) The total amount of components is 100 parts by mass, the curable polymer (A) is 10 to 100 parts by mass, the solvent (B) is 30 to 1,000 parts by mass, and the reactive diluent (C) is 0 to 90 parts by mass, preferably 20 to 80 parts by mass of the curable polymer (A), 50 to 800 parts by mass of the solvent (B), and 20 to 80 parts by mass of the reactive diluent (C), More preferably, the curable polymer (A) is 30 to 75 parts by mass, the solvent (B) is 100 to 700 parts by mass, and the reactive diluent (C) is 25 to 70 parts by mass.
- the blending amount is within this range, it becomes a polymer composition having an appropriate viscosity and can be used to prepare a photosensitive polymer composition described later, as well as various coatings, adhesives, binders for printing ink, etc. It can also be used.
- a photosensitive polymer composition comprising a curable polymer (A), a solvent (B), a reactive diluent (C), a photopolymerization initiator (D), and optionally a colorant (E).
- the photopolymerization initiator (D) is not particularly limited.
- benzoins such as benzoin, benzoin methyl ether, benzoin ethyl ether, and benzoin butyl ether; acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1,1 -Dichloroacetophenone, 4- (1-t-butyldioxy-1-methylethyl) acetophenone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholino-propan-1-one, 2-benzyl-2 -Acetophenones such as dimethylamino-1- (4-morpholinophenyl) butanone-1; anthraquinones such as 2-methylanthraquinone, 2-amylanthraquinone, 2-t-butylanthraquinone, 1-chloroanthraquinone; xanthone, thioxanthone, Thioxanthones such as 1,4-dimethylthioxanth
- the compounding amount of the photopolymerization initiator (D) in the photosensitive polymer composition is generally 0.1 with respect to 100 parts by mass of the total amount of the component (A) and the component (C) in the photosensitive polymer composition. -30 parts by mass, preferably 0.5-20 parts by mass, more preferably 1-15 parts by mass. If it is the compounding quantity of this range, it will become the photosensitive polymer composition which has appropriate photocurability.
- the colorant (E) is not particularly limited as long as it dissolves or disperses in the solvent (B), and examples thereof include dyes and pigments.
- the dye has an acidic group such as carboxylic acid or sulfonic acid from the viewpoint of solubility in the solvent (B) or alkali developer, interaction with other components in the photosensitive polymer composition, heat resistance, and the like. It is preferable to use acid dyes, salts of acid dyes with nitrogen compounds, sulfonamides of acid dyes, and the like.
- 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, 92, 112, 113, 120, 129, 147; acid chrome violetolK; acid Fuchsin; acidacgreen1, 3, 5, 25, 27, 50; acid range6, 7, 8, 10, 12, 50, 51, 52, 56, 63, 74, 95; acid red 1, 4, 8, 14, 17, 18, 26, 27, 29, 31, 34, 35, 37, 42, 44, 50, 51, 52, 57, 69, 73 80, 87, 88, 91, 92, 94, 97, 103, 111, 114, 129, 133 134, 138, 143, 145, 150, 151, 158, 176, 183, 198, 211, 215, 216, 217, 249, 252, 257, 260, 266, 274; acid violet 6B, 7, 9, 17, 19; acid yellow 1, 3, 9, 11, 17,
- pigments examples include C.I. I. Pigment Yellow 1, 3, 12, 13, 14, 15, 16, 17, 20, 24, 31, 53, 83, 86, 93, 94, 109, 110, 117, 125, 128, 137, 138, 139, Yellow pigments such as 147, 148, 150, 153, 154, 166, 173, 194, 214; I. CI orange pigments such as CI Pigment Orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, 71, 73; I.
- Red pigments such as CI Pigment Red 9, 97, 105, 122, 123, 144, 149, 166, 168, 176, 177, 180, 192, 209, 215, 216, 224, 242, 254, 255, 264, 265; C. I. Blue pigments such as CI Pigment Blue 15, 15: 3, 15: 4, 15: 6, 60; I. Violet color pigments such as C.I. Pigment Violet 1, 19, 23, 29, 32, 36, 38; I. Green pigments such as CI Pigment Green 7, 36, 58; I. Brown pigments such as CI Pigment Brown 23 and 25; I. And black pigments such as CI pigment blacks 1 and 7, carbon black, titanium black, and iron oxide.
- Blue pigments such as CI Pigment Blue 15, 15: 3, 15: 4, 15: 6, 60
- I. Violet color pigments such as C.I. Pigment Violet 1, 19, 23, 29, 32, 36, 38
- Green pigments such as CI Pigment Green 7, 36, 58
- Brown pigments such as
- the blending amount of the colorant (E) is generally 5 to 80 parts by mass, preferably 5 to 70 parts by mass with respect to 100 parts by mass of the total amount of the components (A) and (C) in the photosensitive polymer composition. Part, more preferably 10 to 60 parts by weight.
- a known dispersant may be added to the photosensitive polymer composition from the viewpoint of improving the dispersibility of the pigment.
- the dispersant it is preferable to use a polymer dispersant excellent in dispersion stability over time.
- polymer dispersants include urethane dispersants, polyethyleneimine dispersants, polyoxyethylene alkyl ether dispersants, polyoxyethylene glycol diester dispersants, sorbitan aliphatic ester dispersants, and aliphatic modified esters. System dispersants and the like.
- EFKA EFKA Chemicals Beebuy
- Disperbyk manufactured by Big Chemie
- Disparon manufactured by Enomoto Kasei Co., Ltd.
- SOLPERSE manufactured by GENEKA
- the photosensitive polymer composition contains the colorant (E), the curable polymer (A), the solvent (B), the reactive diluent (C), the photopolymerization initiator (D), and the colorant (E).
- the blending amount is generally 10 to 90 parts by mass of the curable polymer (A) and the solvent (B) with respect to 100 parts by mass of the total amount of the components (A) and (C) in the photosensitive polymer composition. Is 30 to 1,000 parts by weight, the reactive diluent (C) is 10 to 90 parts by weight, the photopolymerization initiator (D) is 0.1 to 30 parts by weight, and the colorant (E) is 5 to 80 parts by weight.
- the curable polymer (A) is 20 to 80 parts by mass
- the solvent (B) is 50 to 800 parts by mass
- the reactive diluent (C) is 20 to 80 parts by mass
- the photopolymerization initiator (D ) Is 0.5 to 20 parts by mass
- the colorant (E) is 5 to 70 parts by mass
- the curable polymer (A) is 30 to 75 parts by mass.
- solvent (B) 100 to 700 parts by weight
- the above numerical range is applicable.
- the polymer composition and photosensitive polymer composition of the present invention may be added with known coupling agents, leveling agents, thermal polymerization inhibitors and the like in order to impart predetermined characteristics.
- An agent may be blended. The amount of these additives is not particularly limited as long as it does not impair the effects of the present invention.
- the photosensitive polymer composition of the present invention can be produced by mixing the above components using a known mixing apparatus. Further, if desired, after preparing a polymer composition containing the curable polymer (A) and the solvent (B), the reactive diluent (C), the photopolymerization initiator (D), and optional components. It is also possible to manufacture by mixing the colorant (E).
- the photosensitive polymer composition obtained as described above has alkali developability, it is suitable as a resist.
- the baking temperature may be appropriately selected within a range of 250 ° C. or lower.
- the curable polymer of the present invention is excellent in curability at low temperatures, so it is compared with conventional materials.
- the baking temperature can be lowered.
- the photosensitive polymer composition is used in a pigment / dye dispersion method, the baking temperature can be suppressed to 210 ° C. or lower. The lower the baking temperature, the more advantageous in terms of energy consumption. In the case of the dye dispersion method, it becomes easier to obtain the original characteristics of the dye.
- the baking temperature is desirably 210 ° C. or less, preferably 200 ° C. or less, and more preferably 190 ° C. or less.
- the lower limit of the baking temperature is not necessarily uniform depending on the type of the block isocyanate group contained in the curable polymer, but it is necessary to be not less than the dissociation temperature of the block isocyanate group, and usually 100 ° C. or more, preferably Is 150 ° C. or higher, more preferably 160 ° C. or higher.
- the time required for baking can be appropriately selected, but is usually 10 minutes to 4 hours, preferably 20 minutes to 2 hours.
- the photosensitive polymer composition of the present invention is suitable as a resist used for producing various resists, in particular, color filters incorporated in organic EL displays, liquid crystal display devices, solid-state imaging devices such as CCDs and CMOSs, and the like. Moreover, since the photosensitive polymer composition of the present invention provides a cured film excellent in solvent resistance, low temperature curing characteristics, etc., it can also be used for various coatings, adhesives, printing ink binders, and the like.
- the color filter of the present invention has a colored pattern formed using the above-described photosensitive polymer composition.
- the color filter is generally composed of a substrate, RGB pixels formed thereon, a black matrix formed at the boundary between the pixels, and a protective film formed on the pixels and the black matrix. In this configuration, other configurations can be adopted except that the pixels and the black matrix (colored pattern) are formed using the above-described photosensitive polymer composition.
- a colored pattern is formed on a substrate. Specifically, a black matrix and RGB pixels are sequentially formed on the substrate.
- the material of the base material is not particularly limited, and a glass substrate, a silicon substrate, a polycarbonate substrate, a polyester substrate, a polyamide substrate, a polyamideimide substrate, a polyimide substrate, an aluminum substrate, a printed wiring substrate, an array substrate, or the like is appropriately used. Can do.
- the colored pattern can be formed by a photolithography method. Specifically, after applying the above-mentioned photosensitive polymer composition onto a substrate to form a coating film, the coating film is exposed through a photomask having a predetermined pattern, and the exposed portion is photocured. And a predetermined pattern can be formed by developing after baking an unexposed part with aqueous alkali solution, and baking.
- a method for applying the photosensitive polymer composition is not particularly limited, and screen printing, roll coating, curtain coating, spray coating, spin coating, and the like can be used.
- coating of the photosensitive polymer composition you may volatilize a solvent (B) by heating using heating means, such as a circulation type oven, an infrared heater, a hotplate, as needed.
- the heating conditions are not particularly limited, and may be set as appropriate according to the type of the photosensitive polymer composition to be used. In general, heating may be performed at a temperature of 50 ° C. to 120 ° C. for 30 seconds to 30 minutes.
- the formed coating film is partially exposed by irradiating 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
- the energy dose to be irradiated may be appropriately selected according to the composition of the photosensitive polymer composition, and is preferably 30 to 2000 mJ / cm 2 , for example.
- the light source used for exposure is not particularly limited, and a low-pressure mercury lamp, a medium-pressure mercury lamp, a high-pressure mercury lamp, a xenon lamp, a metal halide lamp, or the like can be used.
- the aqueous alkali solution used for development is not particularly limited, but an aqueous solution of sodium carbonate, potassium carbonate, calcium carbonate, sodium hydroxide, potassium hydroxide, etc .; an aqueous solution of an amine compound such as ethylamine, diethylamine, dimethylethanolamine; Methylammonium, 3-methyl-4-amino-N, N-diethylaniline, 3-methyl-4-amino-N-ethyl-N- ⁇ -hydroxyethylaniline, 3-methyl-4-amino-N-ethyl- P-phenylenediamine such as N- ⁇ -methanesulfonamidoethylaniline, 3-methyl-4-amino-N-ethyl-N- ⁇ -methoxyethylaniline and their sulfate, hydrochloride or p-toluenesulfonate An aqueous solution of a compound can be used. In addition, you
- the baking conditions are not particularly limited, and the heat treatment may be performed according to the type of the photosensitive polymer composition to be used.
- Conventionally known photosensitive polymer compositions become insufficient in solvent resistance when the baking temperature is 200 ° C. or lower.
- the photosensitive polymer composition of the present invention was baked at a temperature of 200 ° C. or lower. Even if it is a case, the coating film which shows sufficient solvent resistance can be obtained (refer Example 6 and Example 8). Therefore, the baking temperature can be lowered, and when baking at a high temperature, the processing time can be shortened, which is a great advantage in manufacturing.
- the heating is usually performed at a temperature of 210 ° C. or lower, preferably 200 ° C. or lower, particularly preferably 190 ° C. or lower, for 10 minutes to 4 hours, preferably 20 minutes to 2 hours.
- Coating, exposure, development and baking as described above are repeated in order using a photosensitive polymer composition for a black matrix and a photosensitive polymer composition for red, green and blue pixels, thereby obtaining a desired color.
- a pattern can be formed.
- the formation method of the coloring pattern by photocuring was demonstrated above, if the photosensitive polymer composition which mix
- the color filter manufactured in this way is excellent in sensitivity and developability, and is manufactured using a photosensitive polymer composition that gives a colored pattern with excellent solvent resistance, so it has excellent color change. With a colored pattern.
- the image display element of the present invention is a display element having the above-described color filter, and specific examples thereof include liquid crystal display elements, organic EL display elements, solid-state imaging elements such as CCD elements and CMOS elements.
- a conventional method may be used except that the above-described color filter is used.
- 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, and both may be bonded together to inject and seal a predetermined amount of liquid crystal.
- an acid value The acid value of the curable polymer (A) measured according to JIS K6901 5.3, which is water required to neutralize the acidic component contained in 1 g of the curable polymer (A). It means the number of mg of potassium oxide.
- the unsaturated group equivalent is a molecular weight per mole of polymerizable unsaturated bonds, and is a calculated value calculated based on the amount of monomer used.
- the block isocyanato group equivalent is a molecular weight per mole of the block isocyanato group, and is a calculated value calculated based on the amount of monomer used.
- the weight average molecular weight (Mw) means a standard polystyrene equivalent weight average molecular weight measured under the following conditions using gel permeation chromatography (GPC).
- Example 1 162.2 g of propylene glycol monomethyl ether acetate was added to a flask equipped with a stirrer, a dropping funnel, a condenser, a thermometer, and a gas introduction tube, and the mixture was stirred while purging with nitrogen and heated to 120 ° C.
- the reaction was continued for 10 hours at 110 ° C., and a polymerizable unsaturated bond was introduced into the side chain of the polymer by the reaction of the carboxyl group derived from acrylic acid and the epoxy group of glycidyl methacrylate to obtain a curable polymer (A).
- the acid value of this polymer was 131.5 mgKOH / g
- the unsaturated group equivalent was 851 g / mol
- the block isocyanate group equivalent was 2,700 g / mol
- the weight average molecular weight was 10,500.
- 82.0 g of propylene glycol monomethyl ether was added to the reaction solution to prepare a polymer solution having a polymer content concentration of 34% of the curable polymer (A). This is designated as Sample 1.
- Example 2 To a flask equipped with a stirrer, a dropping funnel, a condenser, a thermometer, and a gas introduction tube, 232.8 g of propylene glycol monomethyl ether acetate was added, stirred while purging with nitrogen, and the temperature was raised to 120 ° C.
- a polymerizable unsaturated bond is introduced into the side chain of the polymer by the reaction between the epoxy group derived from glycidyl methacrylate and the carboxyl group of acrylic acid, and tetrahydrophthalic anhydride 48. 0 g (0.29 mol) was added, and the reaction was continued at 110 ° C. for 3 hours to react the hydroxy group generated by the cleavage of the epoxy group with the anhydride group of tetrahydrophthalic anhydride.
- the acid value of the polymerizable polymer (B) thus obtained is 92.5 mgKOH / g
- the unsaturated group equivalent is 392 g / mol
- the block isocyanate group equivalent is 4,100 g / mol
- the weight average molecular weight was 12,000.
- 106.53 g of propylene glycol monomethyl ether was added to the reaction solution to prepare a polymer solution having a polymer content concentration of 44.5% of the polymerizable polymer (B). This is designated as Sample 2.
- Example 3 2-isocyanatoethyl methacrylate represented by the formula (2) instead of 12.25 g (0.05 mol) of the reaction product of methacryloyloxyethyl isocyanate represented by the formula (3) and propylene glycol monomethyl ether
- a polymerizable polymer (C) was obtained in the same manner as in Example 1, except that 13.4 g (0.05 mol) of a reaction product of ⁇ -caprolactam with a dissociation temperature of 160 ° C. was used.
- the acid value of this polymer was 130.2 mgKOH / g
- the unsaturated group equivalent was 859 g / mol
- the block isocyanate group equivalent was 2,700 g / mol
- the weight average molecular weight was 15,900.
- 106.53 g of propylene glycol monomethyl ether was added to the reaction solution to prepare a polymer solution having a polymer content concentration of 34% of the polymerizable polymer (C). This is designated as Sample
- Example 4 2-isocyanatoethyl methacrylate represented by the above formula (2) instead of 15.88 g (0.06 mol) of the reaction product of methacryloyloxyethyl isocyanate represented by the above formula (3) and propylene glycol monomethyl ether
- a polymerizable polymer (D) was obtained in the same manner as in Example 2 except that 17.37 g (0.06 mol) of a reaction product of ⁇ -caprolactam was used.
- the acid value of this polymer was 92.5 mgKOH / g
- the unsaturated group equivalent was 392 g / mol
- the block isocyanate group equivalent was 4,100 g / mol
- the weight average molecular weight was 18,000.
- 106.53 g of propylene glycol monomethyl ether was added to the reaction solution to prepare a polymer solution having a polymer content concentration of 44.5% of the polymerizable polymer (D). This is designated as Sample 4.
- Comparative Example 1 Do not use 15.88 g (0.06 mol) of the reaction product of methacryloyloxyethyl isocyanate and propylene glycol monomethyl ether represented by the formula (3), and use 76.48 g (0.
- the polymerizable polymer (E) was obtained in the same manner as in Example 2 except that the amount was 65 mol).
- the acid value of this polymer was 138.5 mgKOH / g, the unsaturated group equivalent was 800 g / mol, and the weight average molecular weight was 9,000.
- 103.3 g of propylene glycol monomethyl ether was added to the reaction solution to prepare a polymer solution having a polymer content concentration of 35% of the polymerizable polymer (E). This is designated as Sample 5.
- Example 5 and Comparative Example 3 ⁇ Preparation of photosensitive polymer composition (pigment type)>
- a stainless steel container filled with 180 parts of zirconia beads having a diameter of 0.5 mm C.I. 10 parts of I Pigment Green 36, 33.75 parts of propylene glycol monomethyl ether acetate, and 6.25 parts of dispersant (Disperbyk-161 manufactured by Big Chemie Japan Co., Ltd.) are added and dispersed by mixing for 3 hours in a paint shaker. By doing so, a green pigment dispersion was prepared.
- the photosensitive polymer composition shown in Table 2 is mixed with the other ingredients shown in Table 1 (that is, curable polymer, reactive diluent, photopolymerization initiator and solvent). (Composition Nos. 1 to 6) were prepared. The blending ratio of each component is as shown in Table 1. In addition, the quantity of the curable polymer in Table 1 does not contain the solvent, and the quantity of the solvent used for the preparation of the polymer solution is added to the solvent as the blending component.
- Example 6 and Comparative Example 4 ⁇ Evaluation of color resist (pigment type)> The performance when using the photosensitive polymer composition obtained in Example 5 as a color resist (pigment type) was evaluated as follows. (1) Pattern formation by color resist After spin coating the prepared color resist (pigment type) on a 5 cm square glass substrate (non-alkali glass substrate) so that the thickness after exposure is 2.5 ⁇ m, The solvent was volatilized by heating at 90 ° C. for 3 minutes. Next, a photomask having a predetermined pattern was disposed at a distance of 100 ⁇ m from the coating film, and the coating film was exposed through this photomask (exposure amount 150 mJ / cm 2 ), and the exposed portion was photocured.
- an unexposed part was dissolved and developed by spraying an aqueous solution containing 0.1% by mass of sodium carbonate at a temperature of 23 ° C. and a pressure of 0.3 MPa, and then baked at 230 ° C. for 30 minutes. A predetermined pattern was formed.
- alkali developability and sensitivity were evaluated as follows.
- the color resists (experiment numbers 5-1 to 5-4) using the photosensitive polymer compositions of Examples 1 to 4 have good alkali developability and sensitivity
- the color resists (experiment numbers 5-5 to 5-6) using the photosensitive polymer compositions of Comparative Examples 1 and 2 had good alkali developability or sensitivity, while giving a pattern having excellent solvent properties.
- the baking temperature was as low as 180 ° C. and 200 ° C., the solvent resistance was insufficient.
- Example 7 and Comparative Example 5 ⁇ Preparation of photosensitive polymer composition (dye type)> According to the blending components and blending ratios shown in Table 3, a photosensitive polymer composition (dye type) containing a dye (acid green 3) was prepared. In addition, the quantity of the curable polymer in Table 3 does not include a solvent, and the quantity of the solvent used for the preparation of the polymer solution is added to the solvent as a blending component.
- Example 8 and Comparative Example 6 ⁇ Evaluation of color resist (dye type)> The performance when using the photosensitive polymer composition obtained in Example 7 as a color resist (dye type) was evaluated by the same method as in Example 8. The results are shown in Table 4.
- the color resists (experiment numbers 7-1 to 7-4) using the photosensitive polymer compositions of Examples 1 to 4 have good alkali developability and sensitivity
- the color resists (experiment numbers 7-5 to 7-6) using the photosensitive polymer compositions of Comparative Examples 1 and 2 are not good in alkali developability or sensitivity while being excellent in solvent property.
- the baking temperature is as low as 180 ° C. or 200 ° C., the solvent resistance is poor.
- Comparative Example 7 A polymerizable polymer (G) was obtained in the same manner as in Example 1 except that the modification reaction with glycidyl methacrylate was not performed.
- the acid value of this polymer was 324.0 mgKOH / g
- the blocked isocyanate group equivalent was 2,300 g / mol
- the weight average molecular weight was 9,000.
- 52.2 g of propylene glycol monomethyl ether was added to the reaction solution to prepare a polymer solution having a polymer content concentration of 35.0% of the polymerizable polymer (G). Except for using this polymer solution, a photosensitive polymer composition (dye type) was prepared in the same manner as in Example 7, and the performance as a color resist was evaluated. The solvent resistance was insufficient.
- the sensitivity and developability are good, and sufficient solvent resistance can be obtained even when the baking temperature during pattern formation is lowered.
- the curable polymer which can form the cured coating film which has can be provided. Further, by using the curable polymer, a photosensitive polymer composition excellent in sensitivity, developability and solvent resistance and suitable as a color filter resist can be obtained. Furthermore, by using the photosensitive polymer composition, a color filter having excellent solvent resistance and high reliability can be obtained.
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Abstract
Description
(I)(a)ブロックイソシアナト基含有モノマー、(b)不飽和酸モノマー、および所望により用いられる(d)その他のモノマーの共重合体に、酸基と反応性の官能基を含む不飽和モノマーを反応させて側鎖に重合性不飽和結合を導入した変性ポリマー。
(II)(a)ブロックイソシアナト基含有モノマー、(c)酸基と反応性の官能基を有する不飽和モノマーおよび所望により用いられる(d)その他のモノマーの共重合体に、(e)不飽和一塩基酸および(f)二塩基酸またはその無水物モノマーを反応させて側鎖に酸基および重合性不飽和結合を導入した変性ポリマー。
上記(I)で示される硬化性ポリマーは、(a)ブロックイソシアナト基含有モノマー、(b)不飽和酸モノマー、および所望により用いられる(d)その他のモノマーを常法に従って共重合することにより硬化性ポリマーの前駆体を製造した後、(b)不飽和酸モノマー由来の酸基に、該酸基と反応性の官能基を有する不飽和モノマーを反応させて側鎖に重合性不飽和結合を導入することにより得ることができる。
共重合体の製造に用いられるブロックイソシアナト基含有モノマーは、分子中にビニル基、(メタ)アクリロイルオキシ基等の反応性のエチレン性不飽和基を有するイソシアネート化合物におけるイソシアナト基を、ブロック剤でブロック化した化合物である。好ましいイソシアネート化合物としては、下記式(1)で表される化合物を挙げることができる。
ブタジエン、イソプレン、クロロプレンなどのジエン;
(メタ)アクリル酸アニリド、(メタ)アクリロニトリル、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、ビニルトルエンなどのビニル化合物;
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などの不飽和ジカルボン酸ジエステル;
N-フェニルマレイミド、N-シクロヘキシルマレイミド、N-ラウリルマレイミド、N-(4-ヒドロキシフェニル)マレイミドなどのモノマレイミド;
などが挙げられる。これらは、単独で又は2種以上を組み合わせて用いることができる。
エチレングリコールモノメチルエーテルアセテート、エチレングリコールモノエチルエーテルアセテート、プロピレングリコールモノメチルエーテルアセテート、プロピレングリコールモノエチルエーテルアセテート等の(ポリ)アルキレングリコールモノアルキルエーテルアセテート類;
メチルエチルケトン、シクロヘキサノン、2-ヘプタノン、3-ヘプタノン等のケトン類;
2-ヒドロキシプロピオン酸メチル、2-ヒドロキシプロピオン酸エチル、2-ヒドロキシ-2-メチルプロピオン酸メチル、2-ヒドロキシ-2-メチルプロピオン酸エチル、3-メトキシプロピオン酸メチル、3-メトキシプロピオン酸エチル、3-エトキシプロピオン酸メチル、3-エトキシプロピオン酸エチル、エトキシ酢酸エチル、ヒドロキシ酢酸エチル、2-ヒドロキシ-3-メチル酪酸メチル、3-メチル-3-メトキシブチルアセテート、3-メチル-3-メトキシブチルプロピオネート、酢酸エチル、酢酸n-ブチル、酢酸n-プロピル、酢酸i-プロピル、酢酸n-ブチル、酢酸i-ブチル、酢酸n-アミル、酢酸i-アミル、プロピオン酸n-ブチル、酪酸エチル、酪酸n-プロピル、酪酸i-プロピル、酪酸n-ブチル、ピルビン酸メチル、ピルビン酸エチル、ピルビン酸n-プロピル、アセト酢酸メチル、アセト酢酸エチル、2-オキソ酪酸エチル等のエステル類;
トルエン、キシレン等の芳香族炭化水素類;
N-メチルピロリドン、N,N-ジメチルホルムアミド、N,N-ジメチルアセトアミド等のカルボン酸アミド類等
を挙げることができる。これらの溶剤は、単独でまたは2種以上を混合して使用することができる。
本発明においては、かくして製造される付加共重合体が、硬化性ポリマー(I)の前駆体として使用される。この前駆体には、(b)不飽和酸モノマーに由来する酸基が含まれており、この酸基に(c)酸基と反応性の官能基を有する不飽和モノマーを反応させて側鎖に重合性不飽和結合を導入することにより、目的とする酸基、重合性不飽和基およびブロックイソシアナト基を分子中に含有し、且つ、ポリスチレン換算の重量平均分子量が1,000~50,000である硬化性ポリマー(I)を得ることができる。分子中に重合性不飽和結合が存在することにより、この硬化性ポリマーをカラーフィルター用の感光性材料として用いる際の感度や現像性が大きく向上する。
また、硬化性ポリマーの酸価(JIS K6901 5.3)は、適宜選択できるが、感光性重合体として使用する場合には、通常、20~300KOHmg/g、好ましくは30~200KOHmg/gの範囲である。この酸価が20KOHmg/g未満であると、感光性重合体としてのアルカリ現像性が低下してしまうことがある。一方、この酸価が300KOHmg/gを超えると、アルカリ現像液に対して露光部分(光硬化部分)が溶解し易くなり、パターン形状が不十分になることがある。
上記(II)で示される硬化性ポリマーは、(a)ブロックイソシアナト基含有モノマー、(c)酸基と反応性の官能基を有する不飽和モノマー、および所望により用いられる(d)その他のモノマーを常法に従って共重合することにより硬化性ポリマー(II)の前駆体を製造した後、該前駆体に(e)不飽和一塩基酸および(f)多塩基酸またはその無水物を反応させて側鎖に酸基および重合性不飽和結合を導入することにより得ることができる。
この前駆体を製造するために用いられる(a)ブロックイソシアナト基含有モノマーおよび(d)その他のモノマーは、上記の硬化性ポリマー(I)の製造に用いられるものと同様である。硬化性ポリマー(I)の場合には、必須成分として(b)不飽和酸モノマーが用いられるが、硬化性ポリマー(II)の場合には、(b)不飽和酸モノマーに代えて(c)酸基と反応性の官能基を有する不飽和モノマーが用いられる。なお、この(c)成分の具体例は、硬化性ポリマー(I)の製造に用いられるものと同様であり、なかでも、エポキシ基を有する不飽和モノマー、とくにグリシジル(メタ)アクリレートが好ましく使用される。
(1)ブロックイソシアナト基を有するモノマーとエポキシ基を含む不飽和モノマーを用いて前駆体を合成した後、多塩基酸無水物を反応させて酸基を導入した後、2-(メタ)アクリロイルオキシエチルイソシアネート、2-(メタ)アクリロイルエチルイソシアネートなどの不飽和結合を含むイソシアネート化合物を、エポキシ基の開裂によって生成したヒドロキシ基と反応させる方法。
(2)ブロックイソシアネート基を有するモノマーとヒドロキシ基を含む不飽和モノマーを用いて前駆体を合成した後、分子内のヒドロキシ基と、多塩基酸無水物および不飽和結合を含むイソシアネート化合物をそれぞれ反応させて酸基および不飽和結合を導入する方法。
(3)ブロックイソシアナト基含有モノマーを用いずに、酸基およびイソシアナト基と反応性の官能基(例えば、ヒドロキシ基やアミノ基)を含む前駆体を製造した後、上記に説明したいずれかの方法で不飽和結合を導入し、その後、分子内のイソシアナト基と反応性の官能基と、片末端をブロックしたジイソシアネート化合物とを反応させることによりポリマー中にブロックイソシアナト基を導入する方法。
本発明においては、かかる硬化性ポリマー(A)に加えて、溶剤(B)および任意に反応性希釈剤(C)を含む重合体組成物が提供される。溶剤(B)は、硬化性ポリマー(A)と反応しない不活性な溶剤であれば特に限定されず、硬化性ポリマー(A)を製造する際に用いた溶剤と同じ範疇のものを用いることができる。その具体例は、前述のとおりであり、好ましくは、プロピレングリコールモノメチルエーテルなどの(ポリ)アルキレングリコールモノアルキルエーテル系溶剤およびプロピレングリコールモノメチルエーテルアセテートなどの(ポリ)アルキレングリコールモノアルキルエーテルアセテート系溶剤、すなわち、グリコールエーテル系溶剤が用いられる。
また、本発明においては、硬化性ポリマー(A)、溶剤(B)、反応性希釈剤(C)、光重合開始剤(D)および任意に着色剤(E)を含む感光性重合体組成物が提供される。光重合開始剤(D)としては、特に限定されないが、例えば、ベンゾイン、ベンゾインメチルエーテル、ベンゾインエチルエーテル、ベンゾインブチルエーテルなどのベンゾイン類; アセトフェノン、2,2-ジメトキシ-2-フェニルアセトフェノン、1,1-ジクロロアセトフェノン、4-(1-t-ブチルジオキシ-1-メチルエチル)アセトフェノン、2-メチル-1-[4-(メチルチオ)フェニル]-2-モルホリノ-プロパン-1-オン、2-ベンジル-2-ジメチルアミノ-1-(4-モルホリノフェニル)ブタノン-1などのアセトフェノン類; 2-メチルアントラキノン、2-アミルアントラキノン、2-t-ブチルアントラキノン、1-クロロアントラキノンなどのアントラキノン類; キサントン、チオキサントン、2,4-ジメチルチオキサントン、2,4-ジイソプロピルチオキサントン、2-クロロチオキサントンなどのチオキサントン類; アセトフェノンジメチルケタール、ベンジルジメチルケタールなどのケタール類; ベンゾフェノン、4-(1-t-ブチルジオキシ-1-メチルエチル)ベンゾフェノン、3,3’,4,4’-テトラキス(t-ブチルジオキシカルボニル)ベンゾフェノンなどのベンゾフェノン類; アシルホスフィンオキサイド類;などが挙げられる。これらは、単独で又は2種以上を組み合わせて用いることができる。
次に、本発明の感光性重合体組成物を用いて調製した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、上記の感光性重合体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およ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)が上記の感光性重合体組成物を用いて形成されることを除けば、その他の構成は公知のものを採用することができる。
本発明の画像表示素子は、上記のカラーフィルターを有する表示素子であり、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。かかる画像表示素子を製造するにあたっては、上記のカラーフィルターを使用すること以外、常法に従って行えばよい。例えば、液晶表示素子を製造する場合には、基板上に、上記カラーフィルターを形成し、次いで、電極、スペーサー等を順次形成する。そして、もう一枚の基板上に電極等を形成し、両者を張り合わせて所定量の液晶を注入、封止すればよい。
(1)酸価: JIS K6901 5.3に従って測定された硬化性ポリマー(A)の酸価であって、該硬化性ポリマー(A)1g中に含まれる酸性成分を中和するのに要する水酸化カリウムのmg数を意味する。
(2)不飽和基当量は、重合性不飽和結合のモル数当たりの分子量であり、モノマーの使用量に基づいて算出した計算値である。
(3)ブロックイソシアナト基当量は、ブロックイソシアナト基のモル数当たりの分子量であり、モノマーの使用量に基づいて算出した計算値である。
(4)重量平均分子量(Mw)とは、ゲルパーミエーションクロマトグラフィー(GPC)を用いて、下記条件にて測定した標準ポリスチレン換算重量平均分子量を意味する。
カラム:ショウデックス(登録商標) LF-804+LF-804(昭和電工株式会社製)
カラム温度:40℃
試料:共重合体の0.2%テトラヒドロフラン溶液
展開溶媒:テトラヒドロフラン
検出器:示差屈折計(ショウデックス RI-71S)(昭和電工株式会社製)
流速: 1mL/min
攪拌装置、滴下ロート、コンデンサー、温度計及びガス導入管を備えたフラスコに、プロピレングリコールモノメチルエーテルアセテート162.2gを加え、窒素置換しながら攪拌し、120℃に昇温した。
次いで、ノルボルンネン4.7g(0.05モル)、ビニルトルエン53.0g(0.45モル)、アクリル酸32.4g(0.45モル)および前記式(3)で示されるメタクロイルオキシエチルイソシアネートとプロピレングリコールモノメチルエーテルとの反応生成物(解離温度160℃)12.25g(0.05モル)からなるモノマー混合物に、10.3gのt-ブチルパーオキシ-2-エチルヘキサノエート(重合開始剤、日油社製、パーブチルO)を添加したものを、滴下ロートから2時間にわたって前記フラスコ中に滴下した。滴下終了後、120℃でさらに2時間攪拌して共重合反応を行い、付加共重合体(硬化性ポリマーの前駆体)を生成させた。その後、フラスコ内を空気に置換して、グリシジルメタクリレート22.5g(0.16モル)、トリフェニルホスフィン(触媒)0.4gおよびメチルハイドロキノン0.4gを上記の付加共重合体溶液中に投入し、110℃で10時間にわたり反応を続け、アクリル酸由来のカルボキシル基とグリシジルメタクリレートのエポキシ基の反応によりポリマーの側鎖に重合性不飽和結合を導入し、硬化性ポリマー(A)を得た。このポリマーの酸価は131.5mgKOH/gであり、不飽和基当量は851g/molであり、ブロックイソシアナト基当量は 2,700g/molであり、重量平均分子量は10,500であった。
次に、反応溶液に82.0gのプロピレングリコールモノメチルエーテルを加え、硬化性ポリマー(A)のポリマー分濃度34%の重合体溶液を調製した。これを試料1とする。
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、プロピレングリコールモノメチルエーテルアセテート232.8gを加え、窒素置換しながら攪拌し、120℃に昇温した。次いで、ノルボルンネン6.09g(0.06モル)、ビニルトルエン68.33g(0.58モル)、グリシジルメタクリレート82.0g(0.58モル)および前記式(3)で示されるメタクロイルオキシエチルイソシアネートとプロピレングリコールモノメチルエーテルとの反応生成物(解離温度160℃)15.88g(0.06モル)からなるモノマー混合物に、13.3gのt-ブチルパーオキシ-2-エチルヘキサノエート(重合開始剤、日油社製、パーブチルO)を添加したものを、滴下ロートから2時間にわたって前記フラスコ中に滴下した。滴下終了後、120℃でさらに2時間攪拌して共重合反応を行い、付加共重合体を生成させた。その後、フラスコ内を空気に置換して、アクリル酸42.0g(0.58モル)、トリフェニルホスフィン(触媒)0.5gおよびメチルハイドロキノン0.5gを上記の付加共重合体溶液中に投入し、110℃で10時間にわたり反応を続け、グリシジルメタクリレート由来のエポキシ基とアクリル酸のカルボキシル基との反応によりポリマーの側鎖に重合性不飽和結合を導入し、さらに、テトラヒドロフタル酸無水物48.0g(0.29モル)を加えて110℃で3時間にわたり反応を続けて、エポキシ基の開裂により生じたヒドロキシ基とテトラヒドロフタル酸無水物の無水物基とを反応させた。このようにして得られた重合性ポリマー(B)の酸価は92.5mgKOH/gであり、不飽和基当量は392g/molであり、ブロックイソシアナト基当量は4,100g/molであり、重量平均分子量は12,000であった。
次に、反応溶液に、106.53gのプロピレングリコールモノメチルエーテルを加え、重合性ポリマー(B)のポリマー分濃度44.5%の重合体溶液を調製した。これを試料2とする。
前記式(3)で示されるメタクロイルオキシエチルイソシアネートとプロピレングリコールモノメチルエーテルとの反応生成物12.25g(0.05モル)に代えて前記式(2)で示される2-イソシアナトエチルメタアクリレートとε-カプロラクタムとの反応生成物、解離温度160℃)13.4g(0.05モル)を使用すること以外は実施例1と同様にして、重合性ポリマー(C)を得た。このポリマーの酸価は130.2mgKOH/gであり、不飽和基当量は859g/molであり、ブロックイソシアナト基当量は2,700g/molであり、重量平均分子量は15,900であった。
次いで、反応溶液に、106.53gのプロピレングリコールモノメチルエーテルを加え、重合性ポリマー(C)のポリマー分濃度34%の重合体溶液を調製した。これを試料3とする。
前記式(3)で示されるメタクロイルオキシエチルイソシアネートとプロピレングリコールモノメチルエーテルとの反応生成物15.88g(0.06モル)に代えて前記式(2)で示される2-イソシアナトエチルメタアクリレートとε-カプロラクタムとの反応生成物17.37g(0.06モル)を使用すること以外は実施例2と同様にして、重合性ポリマー(D)を得た。このポリマーの酸価は92.5mgKOH/gであり、不飽和基当量は392g/molであり、ブロックイソシアナト基当量は4,100g/molであり、重量平均分子量は18,000であった。
次いで、反応溶液に、106.53gのプロピレングリコールモノメチルエーテルを加え、重合性ポリマー(D)のポリマー分濃度44.5%の重合体溶液を調製した。これを試料4とする。
前記式(3)で示されるメタクロイルオキシエチルイソシアネートとプロピレングリコールモノメチルエーテルとの反応生成物15.88g(0.06モル)を使用しないこと、およびビニルトルエンの使用量を76.48g(0.65モル)とすること以外は実施例2と同様にして、重合性ポリマー(E)を得た。このポリマーの酸価は138.5mgKOH/gであり、不飽和基当量は800g/molであり、重量平均分子量は9,000であった。
次いで、反応溶液に、103.3gのプロピレングリコールモノメチルエーテルを加え、重合性ポリマー(E)のポリマー分濃度35%の重合体溶液を調製した。これを試料5とする。
前記式(2)で示される2-イソシアナトエチルメタアクリレートとε-カプロラクタムとの反応生成物13.4g(0.05モル)を使用しないこと、およびビニルトルエンの使用量を59.0g(0.5モル)とすること以外は実施例3と同様にして、重合性ポリマー(F)を得た。このポリマーのポリマー分酸価は142.2mgKOH/gであり、不飽和基当量は800g/molであり、重量平均分子量は10,000であった。
次いで、反応溶液に、106.53gのプロピレングリコールモノメチルエーテルを加え、重合性ポリマー(F)のポリマー分濃度44.5%の重合体溶液を調製した。これを試料6とする。
<感光性重合体組成物(顔料タイプ)の調製>
直径0.5mmのジルコニアビーズ180部を充填したステンレス製容器に、C.Iピグメントグリーン36を10部、プロピレングリコールモノメチルエーテルアセテートを33.75部、分散剤(ビッグケミー・ジャパン株式会社製Disperbyk-161)を6.25部投入して、ペイントシェーカーで3時間混合して分散させることにより、緑色顔料分散液を調製した。
この緑色顔料分散液を用いて、表1に示すその他の配合成分(すなわち、硬化性ポリマー、反応性希釈剤、光重合開始剤および溶剤)と混合して、表2に示す感光性重合体組成物(組成物No.1~6)を調製した。それぞれの成分の配合割合は、表1に示すとおりである。なお、表1における硬化性ポリマーの量は溶剤を含んでおらず、重合体溶液の調製に用いられた溶剤の量は、配合成分としての溶剤の中に合算されている。
<カラーレジスト(顔料タイプ)の評価>
実施例5で得られた感光性重合体組成物をカラーレジスト(顔料タイプ)として使用する際の性能を以下のようにして評価した。
(1)カラーレジストによるパターン形成
調製されたカラーレジスト(顔料タイプ)を、5cm角ガラス基板(無アルカリガラス基板)上に、露光後の厚さが2.5μmとなるようにスピンコートした後、90℃で3分間加熱することで溶剤を揮発させた。次に、塗布膜から100μmの距離に所定のパターンのフォトマスクを配置し、このフォトマスクを介して塗布膜を露光(露光量150mJ/cm2)し、露光部分を光硬化させた。次に、0.1質量%の炭酸ナトリウムを含む水溶液を23℃の温度及び0.3MPaの圧力でスプレーすることによって未露光部分を溶解して現像した後、230℃で30分間ベーキングすることで所定のパターンを形成した。
上記のようにして形成されたパターンについて、アルカリ現像性および感度を以下のようにして評価した。
(2-1)アルカリ現像性
アルカリ現像性は、アルカリ現像後の残渣、及び現像形態により確認した。アルカリ現像後の残渣は、アルカリ現像後のパターンを、(株)日立ハイテクノロジーズ製電子顕微鏡S-3400を用いて観察することにより確認した。この評価の基準は以下の通りである。
○:残渣なし
×:残渣あり
(2-2)感度
上記のスプレーを用いたアルカリ現像を30秒間行い、アルカリ現像前後におけるパターン厚さの減少量を測定することにより、感度の良否を判定した。このパターン厚さは、減少量が少ないほど感度が良好であると言えるため、この評価の基準は以下の通りとした。
○:0.20μm未満
×:0.20μm以上
5cm角ガラス基板(無アルカリガラス基板)上に、上記のカラーレジストから顔料を抜いたタイプの重合体組成物を、露光後の厚さが2.5μmとなるようにスピンコートした後、90℃で3分間加熱して溶剤を揮発させた。次に、塗布膜に波長365nmの光を露光し、露光部分を光硬化させたのち、ベーキング温度180℃、200℃および230℃の乾燥器中に1時間放置して硬化塗膜を作成した。容量500mLの蓋付きガラス瓶に200mLのn-メチル-2-ピロリドンを入れ、その中に上記の硬化塗膜付き試験片を浸漬した後、23℃で1時間経過後の色変化を分光光度計UV-1650PC(株式会社島津製作所製)にて測定し、その結果に基づいて耐溶剤性の評価を行った。この評価の基準は、以下の通りである。
○:ΔE*abが0.3未満
×:ΔE*abが0.3以上
上記のアルカリ現像性、感度及び耐溶剤性の評価結果を表2に示す。
<感光性重合体組成物(染料タイプ)の調製>
表3に示す配合成分および配合割合に従って、染料(acid green3)を含む感光性重合体組成物(染料タイプ)を調製した。なお、表3における硬化性ポリマーの量は溶剤を含んでおらず、重合体溶液の調製に用いられた溶剤の量は、配合成分としての溶剤の中に合算されている。
<カラーレジスト(染料タイプ)の評価>
実施例7で得られた感光性重合体組成物をカラーレジスト(染料タイプ)として使用する際の性能を、実施例8と同様の手法により評価した。結果を表4に示す。
グリシジルメタクリレートによる変性反応を行わないこと以外は実施例1と同様にして、重合性ポリマー(G)を得た。このポリマーの酸価は324.0mgKOH/gであり、ブロックイソシアネート基当量は2,300g/molであり、重量平均分子量は9,000であった。次いで、反応溶液に、52.2gのプロピレングリコールモノメチルエーテルを加え、重合性ポリマー(G)のポリマー分濃度35.0%の重合体溶液を調製した。この重合体溶液を用いること以外は、実施例7と同様にして感光性重合体組成物(染料タイプ)を調製し、カラーレジストとしての性能を評価したところ、本発明例に比較して感度および耐溶剤性において不十分なものであった。
Claims (19)
- 酸基、重合性不飽和基およびブロックイソシアナト基を分子中に含有し、且つ、ポリスチレン換算の重量平均分子量が1,000~50,000であることを特徴とする硬化性ポリマー。
- 酸価が20~300KOHmg/gであり、不飽和基当量が100~4,000g/molであり、ブロックイソシアナト基当量が400~6,000g/molである請求項1記載の硬化性ポリマー。
- 前記硬化性ポリマーが、エチレン性不飽和結合を有するブロックイソシアナト基含有モノマーの重合単位を主鎖中に有し、且つ側鎖に重合性不飽和基を有するものである請求項1または2記載の硬化性ポリマー。
- 酸基が、カルボキシル基または酸無水物基である請求項1~3のいずれかに記載の硬化性ポリマー。
- 硬化性ポリマーが、下記のいずれかである請求項1~4のいずれかに記載の硬化性ポリマー。
(I)(a)ブロックイソシアナト基含有モノマー、(b)不飽和酸モノマー、および所望により用いられる(d)その他のモノマーの共重合体に、(c)酸基と反応性の官能基を有する不飽和モノマーを反応させて側鎖に重合性不飽和結合を導入した変性ポリマー。
(II)(a)ブロックイソシアナト基含有モノマー、(c)酸基と反応性の官能基を有する不飽和モノマー、および所望により用いられる(d)その他のモノマーの共重合体に、(e)不飽和一塩基酸および(f)多塩基酸またはその無水物を反応させて側鎖に重合性不飽和結合および酸基を導入した変性ポリマー。 - ブロックイソシアナト基の解離温度が、100~200℃である請求項1~5のいずれかに記載の硬化性ポリマー。
- ブロックイソシアナト基含有モノマーが、イソシアネート基含有(メタ)アクリレートとブロック剤で形成されるブロック体である請求項5または6記載の硬化性ポリマー。
- ブロック剤が、ラクタム系化合物またはアルコール系化合物である請求項7記載の硬化性ポリマー。
- (d)その他のモノマーが、芳香族ビニル化合物および環状オレフィンから選択される少なくとも一種である請求項5~8のいずれかに記載の硬化性ポリマー。
- 請求項1~9のいずれかに記載の硬化性ポリマー(A)および溶剤(B)を含有する重合体組成物。
- さらに反応性希釈剤(C)を含有する請求項10記載の重合体組成物。
- さらに光重合開始剤(D)を含有する、感光性を有する請求項11記載の重合体組成物。
- さらに着色剤(E)を含有する請求項12記載の重合体組成物。
- 着色剤(E)が染料である請求項13記載の重合体組成物。
- 請求項13または14記載の重合体組成物からなるカラーフィルター用感光性材料。
- 請求項15記載のカラーフィルター用感光性材料を用いて形成されるカラーフィルター。
- 請求項15記載のカラーフィルター用感光性材料を基板に塗布し、マスクを通して露光し、アルカリ現像してパターンを形成した後、210℃以下の温度でベーキングすることを特徴とするカラーフィルターの製造方法。
- 着色剤(E)が染料である請求項17記載のカラーフィルターの製造方法。
- 請求項16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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KR20210121169A (ko) | 2019-01-31 | 2021-10-07 | 스미또모 베이크라이트 가부시키가이샤 | 감광성 수지 조성물, 폴리머, 패턴, 컬러 필터, 블랙 매트릭스, 표시 장치 및 촬상 소자 |
WO2022102368A1 (ja) * | 2020-11-13 | 2022-05-19 | 昭和電工株式会社 | 顔料分散組成物、及び感光性着色組成物 |
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JPWO2014141731A1 (ja) | 2017-02-16 |
TWI511986B (zh) | 2015-12-11 |
TW201439128A (zh) | 2014-10-16 |
CN105008411B (zh) | 2018-07-13 |
CN105008411A (zh) | 2015-10-28 |
KR20150119067A (ko) | 2015-10-23 |
JP6255006B2 (ja) | 2017-12-27 |
KR101855239B1 (ko) | 2018-05-08 |
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