WO2022138159A1 - 共重合体およびその共重合体の製造方法 - Google Patents

共重合体およびその共重合体の製造方法 Download PDF

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Publication number
WO2022138159A1
WO2022138159A1 PCT/JP2021/045077 JP2021045077W WO2022138159A1 WO 2022138159 A1 WO2022138159 A1 WO 2022138159A1 JP 2021045077 W JP2021045077 W JP 2021045077W WO 2022138159 A1 WO2022138159 A1 WO 2022138159A1
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Prior art keywords
solvent
copolymer
resin composition
structural unit
monomer
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PCT/JP2021/045077
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English (en)
French (fr)
Japanese (ja)
Inventor
英理 永井
健宏 木下
恭章 川口
正義 柳
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昭和電工株式会社
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Priority to KR1020237019828A priority Critical patent/KR20230107324A/ko
Priority to CN202180085824.1A priority patent/CN116745327A/zh
Priority to JP2022572102A priority patent/JPWO2022138159A1/ja
Publication of WO2022138159A1 publication Critical patent/WO2022138159A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/46—Polymerisation initiated by wave energy or particle radiation
    • C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
    • C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/10—Esters
    • C08F220/34—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate
    • C08F220/36—Esters containing nitrogen, e.g. N,N-dimethylaminoethyl (meth)acrylate containing oxygen in addition to the carboxy oxygen, e.g. 2-N-morpholinoethyl (meth)acrylate or 2-isocyanatoethyl (meth)acrylate
    • 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
    • C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
    • C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
    • 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
    • C08F8/00—Chemical modification by after-treatment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
    • C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
    • C08F220/04—Acids; Metal salts or ammonium salts thereof
    • C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
    • 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
    • C08F220/20—Esters of polyhydric alcohols or phenols, e.g. 2-hydroxyethyl (meth)acrylate or glycerol mono-(meth)acrylate

Definitions

  • the present invention relates to a copolymer, a resin composition, a color filter, an image display element, and a method for producing a copolymer.
  • an image display element such as a liquid crystal display element, an integrated circuit element, and an image image pickup element such as a solid-state image sensor.
  • a film such as a color filter, a black matrix, a color filter protective film, a photo spacer, a protrusion for liquid crystal alignment, a microlens, an insulating film for a touch panel, and a fine pattern.
  • Patent Document 1 discloses a photosensitive coloring composition containing the following (a) to (e).
  • Patent Document 2 discloses a photosensitive composition for a color filter containing a compound containing a frill group, a compound containing a photopolymerizable functional group, a photopolymerization initiator, and a colorant.
  • the conventional resin composition has good developability and storage stability when used as a photosensitive material, and does not provide a cured product having excellent solvent resistance when cured at a low temperature. rice field.
  • the present invention has been made in view of the above circumstances, has good developability when used as a photosensitive material, has excellent storage stability, and has excellent solvent resistance even when cured at a low temperature. It is an object of the present invention to provide a resin composition for obtaining a cured product, a copolymer useful for preparing the resin composition, and a method for producing the copolymer.
  • the present invention provides a color filter having a coloring pattern made of a cured product of a resin composition, which has good developability and a cured product having excellent solvent resistance even when cured at a low temperature, and a color filter thereof. It is an object of the present invention to provide an image display element provided.
  • R 1 and R 2 each independently represent an alkyl group having 1 to 10 carbon atoms. * Represents a linking site.
  • R 3 represents an alkyl group having 1 to 10 carbon atoms. * Represents a linking site.
  • [5] [1] to [4] contain the structural unit (a) in an amount of 1 to 40 mol%, the structural unit (b) in an amount of 1 to 60 mol%, and the structural unit (c) in an amount of 1 to 60 mol%.
  • the copolymer according to any one of. [6] The molar ratio of the total amount of ester groups contained in the group represented by the formula (1) or the above formula (2) to the total amount of hydroxy groups contained in the structural unit (b) is 10:90.
  • the copolymer (A) is 10 to 90 parts by mass, 30 to 1000 parts by mass of the solvent (B), 10 to 90 parts by mass of the reactive diluent (C), 0.1 to 30 parts by mass of the photopolymerization initiator (D),
  • An image display element comprising the color filter according to [12].
  • the solvent heating step (I) in which the temperature of the solvent (B-1) is raised to 60 to 90 ° C. to prepare the heated solvent (B-1h), and A solvent (ma) having a group represented by the following formula (1) or the following formula (2), a hydroxy group-containing monomer (mb), and an acid group-containing monomer (mc) are used as a solvent.
  • the monomer solution dissolved in B-2) is added dropwise to the heated solvent (B-1h), and the solution is added dropwise.
  • a dropping polymerization step (II) in which a polymerization initiator solution in which a polymerization initiator is dissolved in the solvent (B-2) is added dropwise to the solvent (B-1h) to form a mixed solution.
  • R 1 and R 2 each independently represent an alkyl group having 1 to 10 carbon atoms. * Represents a linking site.
  • R 3 represents an alkyl group having 1 to 10 carbon atoms. * Represents a linking site.
  • a resin composition capable of obtaining a cured product having good alkali developability when used as a photosensitive material, excellent storage stability, and excellent solvent resistance even when cured at a low temperature.
  • a product, a copolymer useful for preparing the resin composition, and a method for producing the copolymer can be provided.
  • An image display element provided with a color filter can be provided.
  • the copolymer of the present invention the method for producing the copolymer, the resin composition, the color filter, and the image display element will be described in detail.
  • the present invention is not limited to the embodiments shown below.
  • the copolymer (A) of the present embodiment is a structural unit (a) having a group represented by the following formula (1) or the following formula (2) (hereinafter, also simply referred to as “constituent unit (a)”).
  • a structural unit (b) having a hydroxy group hereinafter, also simply referred to as “constituent unit (b)”
  • a structural unit (c) having an acid group hereinafter, also simply referred to as “constituent unit (c)”.
  • a structural unit (a) having a group represented by the following formula (1) or the following formula (2) hereinafter, also simply referred to as “constituent unit (a)”.
  • a structural unit (b) having a hydroxy group hereinafter, also simply referred to as “constituent unit (b)”
  • a structural unit (c) having an acid group hereinafter, also simply referred to as “constituent unit (c)”.
  • R 1 and R 2 each independently represent an alkyl group having 1 to 10 carbon atoms. * Represents a linking site.
  • R 3 represents an alkyl group having 1 to 10 carbon atoms. * Represents a linking site.
  • the structural unit (a) is derived from a monomer (ma) having a group represented by the above formula (1) or the above formula (2) (hereinafter, also simply referred to as “monomer (ma)”). It is a structural unit.
  • the group represented by the above formula (1) or the above formula (2) of the structural unit (a) contained in the copolymer (A) is a thermosetting resin composition containing the copolymer (A). By allowing the resin to be exchanged with the hydroxy group of the structural unit (b), a crosslinked structure is formed. Therefore, the resin composition containing the copolymer (A) can be cured at a low temperature of 50 ° C. to 150 ° C. to obtain a cured film having excellent solvent resistance.
  • R 1 and R 2 in the above formula (1) are independently alkyl groups having 1 to 10 carbon atoms.
  • R 1 and R 2 are each independently preferably an alkyl group having 2 to 6 carbon atoms, more preferably an alkyl group having 2 to 3 carbon atoms, and both R 1 and R 2 are carbon atoms. Most preferably, it is an ethyl group of number 2.
  • R 1 and R 2 are ethyl groups, when the resin composition containing the copolymer (A) is thermally cured, R 1 and R 2 are ester-exchanged with the hydroxy group of the structural unit (b) to carry out ethanol. Is generated. Ethanol produced during thermosetting of the resin composition is preferable because it is easily evaporated and removed by heating for thermosetting the resin composition.
  • R3 in the above formula ( 2 ) is an alkyl group having 1 to 10 carbon atoms.
  • R 3 is preferably an alkyl group having 2 to 6 carbon atoms, more preferably an alkyl group having 2 to 3 carbon atoms, and further preferably an ethyl group having 2 carbon atoms.
  • R 3 is an ethyl group
  • the monomer (ma) that gives the structural unit (a) is not particularly limited as long as it is a compound that can be copolymerized with the hydroxy group-containing monomer (mb) and the acid group-containing monomer (mc) described later. ..
  • the monomer (ma) is, for example, ethylenically unsaturated with the group represented by the above formula (1) or the above formula (2) from the viewpoint of reactivity when synthesizing the copolymer (A).
  • Monomers with bonds can be used.
  • Specific examples of the group having an ethylenically unsaturated bond include a vinyl group and a (meth) acryloyloxy group.
  • Examples of the monomer (ma) having a group represented by the above formula (1) or the above formula (2) and an ethylenically unsaturated bond include an ethylenically unsaturated group-containing isocyanate compound and a malonic acid diester. Alternatively, a reaction product with an acetate acetate may be mentioned. These monomers (ma) may be used alone or in combination of two or more.
  • the ethylenically unsaturated group-containing isocyanate compound that produces the monomer (ma) is preferably a compound represented by the following formula (3).
  • R 4 represents a hydrogen atom or a methyl group.
  • R 5 is -CO-, -COOR 6- (where R 6 is an alkylene group having 1 to 6 carbon atoms. ) Or -COO-R 7 O-CONH-R 8- (Here, R 7 is an alkylene group having 2 to 6 carbon atoms.
  • R 8 may have a substituent and has 2 to 2 carbon atoms. It represents 12 alkylene groups or arylene groups having 6 to 12 carbon atoms.
  • R4 in the formula (3) represents a hydrogen atom or a methyl group.
  • R 5 in the formula (3) represents -CO-, -COOR 6- or -COO-R 7 O-CONH-R 8- .
  • R 6 is an alkylene group having 1 to 6 carbon atoms.
  • R 7 is an alkylene group having 2 to 6 carbon atoms.
  • R 8 is an alkylene group having 2 to 12 carbon atoms or an arylene group having 6 to 12 carbon atoms which may have a substituent.
  • R 5 in the formula (3) is preferably ⁇ COOR 6 ⁇ .
  • R 6 is preferably an alkylene group having 1 to 4 carbon atoms.
  • ethylenically unsaturated group-containing isocyanate compound represented by the above formula (3) include 2-isocyanatoethyl (meth) acrylate, 2-isocyanatopropyl (meth) acrylate, and 3-isocyanatopropyl.
  • an equimolar (1 mol: 1 mol) reaction product of a 2-hydroxyalkyl (meth) acrylate and a diisocyanate compound can also be used. ..
  • an alkyl group contained in the above-mentioned 2-hydroxyalkyl (meth) acrylate an ethyl group or an n-propyl group is preferable, and an ethyl group is more preferable.
  • diisocyanate compound examples include hexamethylene diisocyanate, 2,4- (or 2,6-) toluene diisocyanate (TDI), 4,4'-diphenylmethane diisocyanate (MDI), and 3,5,5-trimethyl-.
  • examples thereof include 3-isocyanatomethylcyclohexylisocyanate (IPDI), m- (or p-) xylene diisocyanate, 1,3- (or 1,4-) bis (isocyanatomethyl) cyclohexane, and lysine diisocyanate.
  • These ethylenically unsaturated group-containing isocyanate compounds may be used alone or in combination of two or more.
  • Examples of the malonic acid diester to be reacted with the ethylenically unsaturated group-containing isocyanate compound include dimethyl malonate, diethyl malonate, di (n-propyl) malonate, di (i-propyl) malonate, and the like. Diethyl malonate or dimethyl malonate is preferable in terms of ease of use, cost, and quality.
  • Examples of the acetoacetic ester to be reacted with the ethylenically unsaturated group-containing isocyanate compound include methyl acetoacetate and ethyl acetoacetate.
  • the reaction between the ethylenically unsaturated group-containing isocyanate compound and the malonic acid diester or acetoacetic ester can be carried out with or without the presence of a solvent.
  • a solvent that is inert to the isocyanato group is used.
  • an organometallic salt such as tin, zinc, lead or the like, a tertiary amine or the like may be used as a catalyst.
  • the structural unit (b) having a hydroxy group contained in the copolymer (A) does not have a group represented by the above formula (1) or the above formula (2), but has a hydroxy group.
  • the structural unit (b) is a structural unit derived from a monomer (mb) having a hydroxy group (hereinafter, also simply referred to as “monomer (mb)”) (however, in the structural unit (a)). Applicable ones are excluded).
  • the hydroxy group of the structural unit (b) contained in the copolymer (A) is formed by the formula (1) of the structural unit (a) by thermally curing the resin composition containing the copolymer (A). ) Or ester exchange with the group represented by the formula (2) to form a crosslinked structure.
  • the monomer (mb) giving the structural unit (b) may be a monomer having no group represented by the above formula (1) or the above formula (2) and having a polymerizable unsaturated bond and a hydroxy group. It is not particularly limited.
  • the monomer (mb) include (meth) acrylic acid ester derivatives having a hydroxy group. Specific examples of such a monomer (mb) include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, and 2,3-dihydroxypropyl. Examples thereof include (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 2-hydroxy-3-phenoxypropyl (meth) acrylate. These monomers (mb) may be used alone or in combination of two or more.
  • the monomer (mb) among the above-mentioned monomers, the reactivity at the time of synthesizing the copolymer (A) and the low-temperature curability of the resin composition containing the copolymer (A) are available. From the viewpoint of ease, hydroxyalkyl (meth) acrylate is preferable. As the hydroxyalkyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 4-hydroxybutyl (meth) acrylate are preferable, and the glass transition temperature of the copolymer (A) is reduced. 4-Hydroxybutyl (meth) acrylate is more preferable from the viewpoint of
  • the structural unit (c) having an acid group contained in the copolymer (A) does not have a group represented by the above formula (1) or the above formula (2), and does not have a hydroxy group, but has an acid group.
  • the structural unit (c) is a structural unit derived from a monomer (mc) having an acid group (hereinafter, also simply referred to as “monomer (mc)”) (however, the structural unit (a) and the constitutional unit (c)). Excluding those corresponding to unit (b)). Since the copolymer (A) contains the structural unit (c), the alkali developability becomes good when the resin composition containing the copolymer (A) is used as a photosensitive material.
  • Examples of the acid group contained in the structural unit (c) include a carboxy group, a sulfo group, a phospho group and the like. Among these acid groups, a carboxy group is preferable as the acid group of the structural unit (c) from the viewpoint of easy availability.
  • the monomer (mc) that gives the structural unit (c) does not have a group represented by the above formula (1) or the above formula (2), or a hydroxy group, and has a polymerizable unsaturated bond and an acid group. Any monomer may be used, and is not particularly limited. Examples of the monomer (mc) include unsaturated carboxylic acid or an anhydride thereof, unsaturated sulfonic acid, unsaturated phosphonic acid and the like.
  • the monomer (mc) include (meth) acrylic acid, ⁇ -bromo (meth) acrylic acid, ⁇ -frill (meth) acrylic acid, crotonic acid, propiole acid, silicic acid, and ⁇ -.
  • Unsaturated carboxylic acids such as cyanosilicate skin acid, maleic acid, maleic anhydride, monomethyl maleate, monoethyl maleate, monoisopropyl maleate, fumaric acid, itaconic acid, itaconic anhydride, citraconic acid, and citraconic anhydride, or their anhydrides.
  • the monomer (mc) among these monomers, an unsaturated carboxylic acid is easily available and the resin composition containing the copolymer (A) has excellent alkali developability. It is preferable to use, and it is more preferable to use (meth) acrylic acid.
  • the ratio of the structural unit (a), the structural unit (b), and the structural unit (c) contained in the copolymer (A) will be described.
  • the ratio of the structural unit (a) contained in the copolymer (A) is not particularly limited, but is preferably 1 to 40 mol%, more preferably 5 to 30 mol%, and most preferably 10 to 20 mol%. Is.
  • the ratio of the structural unit (b) contained in the copolymer (A) is not particularly limited, but is preferably 1 to 60 mol%, more preferably 10 to 50 mol%, and most preferably 20 to 40 mol%.
  • the ratio of the structural unit (c) contained in the copolymer (A) is not particularly limited, but is preferably 1 to 60 mol%, more preferably 10 to 50 mol%, and most preferably 15 to 40 mol%. Is.
  • the copolymer (A) contains 1 to 40 mol% of the constituent unit (a), 1 to 60 mol% of the constituent unit (b), and 1 to 60 mol% of the constituent unit (c). ..
  • the copolymer (A) of the present embodiment when the ratio of the structural unit (a) and the structural unit (b) is 1 mol% or more, the resin composition containing the copolymer (A) is thermally cured. As a result, the hydroxy group of the structural unit (b) and the group represented by the formula (1) or the formula (2) of the structural unit (a) are ester-exchanged. Therefore, a sufficiently crosslinked structure is generated.
  • the resin composition containing the copolymer (A) containing 1 mol% or more of the structural unit (a) and the structural unit (b), respectively, is a cured product having good solvent resistance even when thermally cured at a low temperature. Is obtained.
  • the proportion of the structural unit (a) in the copolymer (A) is 40 mol% or less, the storage stability of the resin composition containing the copolymer (A) becomes better. Further, when the ratio of the constituent unit (a) is 40 mol% or less, it becomes easy to secure the contents of the constituent unit (b) and the constituent unit (c). Therefore, the effect of including the constituent unit (b) and the constituent unit (c) can be easily obtained.
  • the ratio of the constituent unit (b) in the copolymer (A) is 60 mol% or less, gelation during the polymerization reaction for producing the copolymer (A) can be prevented. Further, the crosslinked structure is not excessively generated by the transesterification reaction between the structural unit (a) and the structural unit (b), and the storage stability of the resin composition containing the copolymer (A) is better. Will be. Further, when the ratio of the constituent unit (b) is 60 mol% or less, it becomes easy to secure the contents of the constituent unit (a) and the constituent unit (c). Therefore, it becomes easy to obtain the effect of including the constituent unit (a) and the constituent unit (c).
  • the resin composition containing the copolymer (A) has a sufficiently high alkaline development rate. ..
  • the ratio of the constituent unit (c) in the copolymer (A) is 60 mol% or less
  • the alkaline development speed of the resin composition containing the copolymer (A) is appropriately suppressed, so that it is precise. It becomes easier to form a pattern.
  • the ratio of the structural unit (c) in the copolymer (A) is 60 mol% or less, it becomes easy to secure the contents of the structural unit (a) and the structural unit (b). Therefore, even when the resin composition containing the copolymer (A) is cured at a low temperature, it becomes easy to obtain a cured product having better solvent resistance.
  • the molar ratio of the ester group to the hydroxy group ((a): (b)) is preferably 10:90 to 90:10, preferably 30:70 to 70:30. Is more preferable, and 40:60 to 60:40 is even more preferable.
  • the molar ratio of the ester group to the hydroxy group ((a): (b)) is the total amount of the ester groups represented by the above formula (1) or the above formula (2) of the constituent unit (a) and the constituent unit ().
  • b) is a molar ratio with the total amount of hydroxy groups contained in b).
  • the resin composition containing the copolymer (A) is thermally cured to obtain the hydroxy of the constituent unit (b).
  • a crosslinked structure is easily generated by ester exchange between the group and the group represented by the formula (1) or the formula (2) having the structural unit (a). Therefore, a cured product having even better solvent resistance can be obtained.
  • the total amount of the content of the structural unit (a) and the content of the structural unit (b) contained in the copolymer (A) is preferably 20 to 80 mol%, preferably 20 to 60 mol%. It is more preferably present, and even more preferably 25 to 40 mol%.
  • the resin composition containing the copolymer (A) has more storage stability. It is possible to obtain a cured product having excellent solvent resistance even when cured at a low temperature. Further, since the content of the structural unit (c) can be easily secured, it becomes easy to obtain a resin composition having better alkaline developability when used as a photosensitive material.
  • the resin composition containing the copolymer (A) contains a compound having a hydroxy group as the reactive diluent (C) in addition to the copolymer (A), it is contained in the copolymer (A).
  • the total amount of hydroxy groups contained in the structural unit (b) is preferably reduced according to the amount of hydroxy groups contained in the reactive diluent (C).
  • the molar ratio of the total amount of ester groups in the above formula (1) or the above formula (2) of the structural unit (a) to the total amount of hydroxy groups contained in the resin composition is 10 :. It is preferably 90 to 90:10, more preferably 30:70 to 70:30, and even more preferably 40:60 to 60:40.
  • the total amount of hydroxy groups contained in the resin composition is the total of the hydroxy groups contained in the structural unit (b) and the hydroxy groups contained in the reactive diluent (C).
  • the resin composition containing the copolymer (A) is thermally cured to contain the hydroxy group contained in the resin composition and the formula (1) having the structural unit (a).
  • the crosslinked structure by ester exchange with the group represented by the formula (2) is likely to be generated. Therefore, a cured product having even better solvent resistance can be obtained.
  • the copolymer (A) of the present embodiment includes the structural units (a) to (c) as well as other structural units (d) that can be copolymerized with the structural units (a) to (c) (however, the structural units (a) to (a) to the same. (Excluding those corresponding to (c)) may be contained.
  • the monomer (md) that provides the other structural unit (d) may not contain a blocking agent such as a compound having a blocking isocyanate group. preferable.
  • a resin composition containing the copolymer (A) is put into a cured product obtained by heating and curing after coating, exposure and development. Blocking agents may remain.
  • the blocking agent remaining in the cured product may adversely affect the insulating property of the cured product or deteriorate the solvent resistance of the cured product. Further, the blocking agent remaining in the cured product may generate dark spots due to degassing in the image display element provided with the color filter having a coloring pattern made of the cured product.
  • the monomer (md) that gives the other structural unit (d) include an aromatic vinyl compound, a cyclic olefin having a norbornene structure, a diene, a (meth) acrylic acid ester, and a (meth) acrylic acid ester.
  • examples thereof include (meth) acrylic acid amides, vinyl compounds, unsaturated dicarboxylic acid diesters, monomaleimides, glycidyl (meth) acrylates, (meth) acrylic acid anilides, (meth) acrylonitrile, and achlorine.
  • aromatic vinyl compound examples include styrene, ⁇ -methylstyrene, o-vinyltoluene, p-vinyltoluene, o-chlorostyrene, m-chlorostyrene, methoxystyrene, p-nitrostyrene, p-cyanostyrene, and p-acetyl. Amino styrene and the like can be mentioned. Cyclic olefins having a norbornene structure include norbornene (bicyclo [2.2.1] hept-2-ene), 5-methylbicyclo [2.2.1] hept-2-ene, and tetracyclo [4.4.0].
  • Pentadeca-4-en and the like can be mentioned.
  • diene include butadiene, isoprene, and chloroprene.
  • (meth) acrylic acid ester include methyl (meth) acrylate, ethyl (meth) acrylate, iso-propyl (meth) acrylate, tert-butyl (meth) acrylic rate, pentyl (meth) acrylate, and benzyl (meth) acrylate.
  • the (meth) acrylic acid amide includes (meth) acrylic acid amide, (meth) acrylic acid N, N-dimethylamide, (meth) acrylic acid N, N-di-isopropylamide, and (meth) acrylic acid anthracenyl.
  • examples include amide.
  • Examples of the vinyl compound include vinyl chloride, vinylidene chloride, vinyl fluoride, vinylidene fluoride, N-vinylpyrrolidone, vinylpyridine, vinyl acetate, vinyltoluene and the like.
  • unsaturated dicarboxylic acid diesters include diethyl citraconic acid, diethyl maleate, diethyl fumarate, and diethyl itaconic acid.
  • Examples of the monomaleimide include N-phenylmaleimide, N-cyclohexylmaleimide, N-laurylmaleimide, N- (4-hydroxyphenyl) maleimide and the like.
  • (meth) acrylic acid ester as the monomer (md), and from the viewpoint of adjusting the glass transition temperature of the copolymer (A) to 30 ° C. or lower, the glass transition of the homopolymer.
  • the temperature is preferably ⁇ 20 ° C. or lower, and it is particularly preferable to use 2-ethylhexyl (meth) acrylate or 4-hydroxybutyl acrylate.
  • These monomers (md) may be used alone or in combination of two or more.
  • the ratio thereof is not particularly limited, but is preferably more than 0 mol% to 80 mol% or less, and more preferably 10 to 60 mol. %, Most preferably 15 to 50 mol%.
  • the copolymer (A) contains the other structural unit (d)
  • the properties such as solvent resistance of the cured product of the resin composition containing the copolymer (A) can be appropriately improved.
  • the content of the other structural unit (d) is 80 mol% or less, it becomes easy to secure the content of the structural unit (a) to the structural unit (c), and the structural unit (a) to the structural unit (c). ) Is included, and the effect is remarkable.
  • the polystyrene-equivalent weight average molecular weight of the copolymer (A) is not particularly limited, but is preferably 1,000 to 50,000, more preferably 3,000 to 40,000.
  • the weight average molecular weight of the copolymer (A) is 1,000 or more, the alkali developability when the resin composition containing the copolymer (A) is used as a photosensitive material becomes good, and the pattern is obtained after the alkali development. It becomes difficult for the chip to occur.
  • the weight average molecular weight of the copolymer (A) is 50,000 or less, the development time when the resin composition containing the copolymer (A) is used as a photosensitive material becomes appropriate and practical. Is secured.
  • the glass transition temperature (Tg) of the copolymer (A) is 30 ° C. or lower, preferably 20 ° C. or lower, and more preferably 0 ° C. or lower. If the glass transition temperature of the copolymer (A) is more than 30 ° C., the curability at a low temperature is adversely affected. Therefore, the glass transition temperature of the copolymer (A) is set to 30 ° C. or lower.
  • the glass transition temperature of the copolymer (A) is preferably ⁇ 50 ° C. or higher, more preferably ⁇ 40 ° C. or higher, and even more preferably ⁇ 30 ° C. or higher. When the glass transition temperature of the copolymer (A) is ⁇ 50 ° C. or higher, the resin composition containing the copolymer (A) can obtain a cured film having excellent heat resistance.
  • the acid value of the copolymer (A) (JIS K6901 5.3) can be appropriately selected.
  • the acid value of the copolymer (A) is preferably 20 to 300 KOH mg / g, more preferably 30 to 200 KOH mg / g when the resin composition containing the copolymer (A) is used as a photosensitive material. g.
  • the acid value of the copolymer (A) is 20 KOHmg / g or more, the alkali developability becomes good when the resin composition containing the copolymer (A) is used as a photosensitive material.
  • the acid value of the copolymer (A) is 300 KOHmg / g or less
  • the resin composition containing the copolymer (A) is used as a photosensitive material
  • the exposed portion is exposed portion to the alkaline developer. Since the photocured portion) is difficult to dissolve, the pattern shape becomes good.
  • the copolymer (A) contains a group represented by the above formula (1) or the above formula (2) in the molecule.
  • the equivalent number of the groups represented by the above formula (1) or the above formula (2) may be appropriately selected, but is preferably 300 to 6000, and more preferably 1000 to 3000.
  • the equivalent number of the groups represented by the above formula (1) or the above formula (2) is 300 or more, the hydroxy group is sufficiently present in the resin composition containing the copolymer (A).
  • thermosetting this a crosslinked structure by ester exchange between the hydroxy group in the resin composition and the group represented by the formula (1) or the formula (2) having the structural unit (a) is sufficiently obtained. It will be generated. Therefore, a cured product having even better solvent resistance can be obtained.
  • the equivalent number of the groups represented by the above formula (1) or the above formula (2) in the copolymer (A) is the above formula (1) or the above formula (2) contained in the copolymer (A). It is the mass of the copolymer (A) per 1 mol of the group represented.
  • the equivalent number of groups represented by the above formula (1) or the above formula (2) is the above formula (1) or the above formula (2) in which the mass of the copolymer (A) is contained in the copolymer (A). It is obtained by dividing by the number of moles of the group represented by (g / mol).
  • the equivalent number of groups represented by the above formula (1) or the above formula (2) is a theoretical value calculated from the charged amount of the monomer (ma).
  • the group represented by the above formula (1) or the above formula (2) in the copolymer (A) is a part thereof.
  • the copolymer (A) of the present embodiment can be produced, for example, by using a method in which the solvent heating step (I), the dropping polymerization step (II), and the post-polymerization step (III) shown below are performed in this order.
  • solvent heating step (I) The temperature of the solvent (B-1) is raised to 60 to 90 ° C. to prepare the heated solvent (B-1h). In the solvent heating step (I), the temperature may be raised after the chain transfer agent described later is added to the solvent (B-1).
  • the concentration of the chain transfer agent in the solvent (B-1) can be, for example, 0.1 to 10% by mass, and is not particularly limited.
  • the polymerization initiator solution is added dropwise to the heated solvent (B-1h) together with the monomer solution to obtain a mixed solution.
  • the monomer solution includes a monomer (ma) having a group represented by the above formula (1) or the above formula (2), a hydroxy group-containing monomer (mb), and an acid group-containing monomer (mc).
  • the monomer (md) used as needed are dissolved in a solvent (B-2).
  • the polymerization initiator solution is obtained by dissolving the polymerization initiator in a solvent (B-2).
  • either one or both of the solvent (B-1) and the solvent (B-2) contains a hydroxy group-containing solvent.
  • the chain transfer agent solution described later may be added while dropping instead of the chain transfer agent that can be added in the solvent heating step (I).
  • the chain transfer agent solution is a solution of the chain transfer agent in a solvent (B-2). Further, in the solvent heating step (I), a part of the chain transfer agent used for producing the copolymer (A) is put into the solvent (B-1) and then the temperature is raised, and in the subliquid polymerization step (II). A chain transfer agent solution obtained by dissolving a portion of the chain transfer agent to be used in a solvent (B-2) may be added dropwise to the heated solvent (B-1h).
  • solvent (B-1) The solvent (B-1) used in the solvent heating step (I) may be only a hydroxy group-containing solvent, may be only a hydroxy group-free solvent, or may be a hydroxy group-containing solvent and a hydroxy group. It may contain both of the solvents which do not contain.
  • the solvent (B-1) preferably contains a hydroxy group-containing solvent containing a hydroxy group, and more preferably only a hydroxy group-containing solvent.
  • hydroxy group-containing solvent examples include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, diethylene glycol monomethyl ether, diethylene glycol mono-n-butyl ether, triethylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether, and tri.
  • (Poly) alkylene glycol monoalkyl ethers such as propylene glycol monoethyl ether; methyl 2-hydroxypropionate, ethyl 2-hydroxypropionate, methyl 2-hydroxy-2-methylpropionate, 2-hydroxy-2-methylpropion Hydroxy group-containing carboxylic acid esters such as ethyl acid, ethyl hydroxyacetate, and methyl 2-hydroxy-3-methylbutyrate; 3-methoxy-1-butanol; diethylene glycol and the like can be mentioned.
  • hydroxy group-free solvent examples include (poly) alkylene glycol monoalkyl ether acetates such as ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate; diethylene glycol.
  • Ethers such as dimethyl ether, diethylene glycol methyl ethyl ether, diethylene glycol diethyl ether, tetrahydrofuran; ketones such as methyl ethyl ketone, cyclohexanone, 2-heptanone, 3-heptanone; methyl 3-methoxypropionate, methyl 3-ethoxypropionate, ethyl ethoxyacetate , 3-Methyl-3-methoxybutyl acetate, 3-methyl-3-methoxybutyl propionate, ethyl acetate, n-butyl acetate, i-propyl acetate, i-butyl acetate, n-amyl acetate, i-amyl acetate , Esters such as n-butyl propionate, ethyl butyrate, n-propyl butyrate, i-propyl butyrate, ethyl pyru
  • ether solvent from the viewpoint of availability, cost and quality, and it is more preferable to use propylene glycol monomethyl ether acetate and diethylene glycol methyl ethyl ether.
  • propylene glycol monomethyl ether acetate and diethylene glycol methyl ethyl ether.
  • These hydroxy group-free solvents may be used alone or in combination of two or more.
  • the content ratio of the hydroxy group-containing solvent in the solvent (B-1) is 10 to 100% by mass. Is more preferable, 20 to 90% by mass is more preferable, and 40 to 80% by mass is further preferable.
  • the content of the hydroxy group-containing solvent is 10% by mass or more, the ester group and the monomer (mb) derived from the monomer (ma) in the dropping polymerization step (II) and / or the post-polymerization step (III). ) Sufficiently obtains the effect of inhibiting the ester exchange reaction with the hydroxy group derived from).
  • the solvent (B-1) contains a solvent that does not contain a hydroxy group
  • the residual amount of the ester group derived from the monomer (ma) in the copolymer (A) is improved, and the resin composition is cured.
  • the effect of improving the amount of the cross-linking reaction by the ester exchange reaction between the ester group derived from the monomer (ma) and the hydroxy group derived from the monomer (mb) can be obtained.
  • solvent and mixed solution temperature In the production method of the present embodiment, in the solvent heating step (I), the solvent (B-1) is put into the reaction vessel and the temperature is raised to 60 to 90 ° C. Further, in the dropping polymerization step (II) and the post-polymerization step (III), the mixed solution is reacted at 60 to 90 ° C. for 1 to 5 hours while stirring.
  • the temperature of the solvent (B-1h) in the solvent heating step (I) and the temperature of the mixed solution in the dropping polymerization step (II) and the post-polymerization step (III) may be the same or different. good.
  • the temperature of the solvent (B-1h) in the solvent heating step (I) is 60 ° C. or higher
  • the temperature of the mixed solution in the dropping polymerization step (II) and the post-polymerization step (III) is 60 ° C. or higher. Therefore, in the dropping polymerization step (II) and the post-polymerization step (III), the polymerization reaction of the monomers (ma) to (mc) and the monomer (md) used as needed is sufficient. proceed.
  • the dropping polymerization is performed.
  • the step (II) and the post-polymerization step (III) it is possible to suppress the ester exchange reaction between the ester group derived from the monomer (ma) and the hydroxy group derived from the monomer (mb).
  • the temperature is 90 ° C.
  • the polymerization initiator solution and the monomer solution are dropped onto the solvent (B-1h) heated to 60 to 90 ° C. in the solvent heating step (I), and polymerized while forming a mixed solution. I do.
  • the chain transfer agent solution may be further added dropwise to the heated solvent (B-1h) to prepare a mixed solution containing the chain transfer agent.
  • the dropping polymerization step (II) it is preferable to simultaneously drop the polymerization initiator solution and the monomer solution into the heated solvent (B-1h). In this case, the molecular weight of the copolymer (A) can be controlled accurately, and the copolymer (A) in the process of production can be prevented from gelling.
  • the chain transfer agent solution is dropped onto the heated solvent (B-1h) in the dropping polymerization step (II)
  • the chain transfer agent solution may be dropped at the same time as the polymerization initiator solution and the monomer solution. Further, the chain transfer agent solution may be added dropwise before or after the polymerization initiator solution and the monomer solution are added dropwise.
  • the dropping rate of the polymerization initiator solution, monomer solution, and chain transfer agent solution depends on the reaction scale such as the volume of the reaction vessel, the volume of the heated solvent (B-1h) and the polymerization initiator solution, the monomer solution, and the chain transfer agent solution. It can be decided as appropriate.
  • the dropping rate of the polymerization initiator solution, the monomer solution, and the chain transfer agent solution is preferably 0.1 to 5 mL / min, for example, when a 1 L reaction vessel is used.
  • the dropping time of the polymerization initiator solution, the monomer solution, and the chain transfer agent solution can be, for example, 30 minutes to 1 hour.
  • the dropping rate and dropping time of the polymerization initiator solution, the monomer solution, and the chain transfer agent solution may be different from each other, or may be partially or wholly the same.
  • the polymerization initiator solution, the monomer solution, and the chain transfer agent solution used as needed are prepared individually.
  • the polymerization initiator solution is obtained by dissolving the polymerization initiator in a solvent (B-2).
  • the polymerization initiator is not particularly limited, but is, for example, 2,2'-azobis (2,4-dimethylvaleronitrile), azobisisobutyronitrile, azobisisobutyronitrile, benzoyl peroxide, t-butylper. Examples thereof include oxy-2-ethylhexanoate. These polymerization initiators may be used alone or in combination of two or more.
  • the concentration of the polymerization initiator in the polymerization initiator solution is preferably a concentration at which a mixed solution having a uniform concentration can be easily obtained, and is, for example, 16 to 50% by mass, and is not particularly limited.
  • the amount of the polymerization initiator solution to be used is preferably such that the amount of the polymerization initiator contained in the polymerization initiator solution is 0.5 to 20 parts by mass with respect to 100 parts by mass of the total amount of the monomers charged. More preferably, the amount is 1.0 to 10 parts by mass.
  • the total amount of the monomer charged is the mass of the monomer (ma) to the monomer (md) in the monomer solution.
  • the monomer solution includes a monomer (ma) having a group represented by the above formula (1) or the above formula (2), a hydroxy group-containing monomer (mb), and an acid group-containing monomer (mc). And the monomer (md) used as needed are dissolved in a solvent (B-2).
  • a solvent (B-2) As the monomer (ma) to the monomer (md), those exemplified in the item of the copolymer (A) can be used.
  • the monomer solution may be produced by a method in which the monomers (ma) to (md) are individually dissolved in a solvent (B-2) and then mixed, or the monomers (ma) to the monomer solution may be produced. (Md) may be mixed and then dissolved in a solvent (B-2).
  • the total concentration of the monomers (ma) to (md) in the monomer solution is preferably a concentration at which a mixed solution having a uniform concentration can be easily obtained, and can be, for example, 50 to 95% by mass. , Not particularly limited.
  • the ratio of each of the monomers (ma) to (mc) used in the production of the copolymer (A) is not particularly limited, but the monomer (ma) is 1 to 40 mol% and the monomer (m).
  • -B) 1 to 60 mol%, preferably 1 to 60 mol% of the monomer (mc), 5 to 30 mol% of the monomer (ma), 10 to 50 mol% of the monomer (mb), It is more preferably 10 to 50 mol% of the monomer (mc), 10 to 20 mol% of the monomer (ma), 20 to 40 mol% of the monomer (mb), and 15 to 15 mol% of the monomer (mc). It is more preferably 40 mol%.
  • the ratio of each of the monomers (ma) to (md) used in the production of the copolymer (A) is not particularly limited. However, 1 to 40 mol% of the monomer (ma), 1 to 60 mol% of the monomer (mb), 1 to 60 mol% of the monomer (mc), and more than 0 to 80 mol% of the monomer (md).
  • the content is preferably 5 to 30 mol% of the monomer (ma), 10 to 50 mol% of the monomer (mb), 10 to 50 mol% of the monomer (mc), and 10 to 10 to the monomer (md).
  • the monomer (ma) More preferably, it is 60 mol%, 10 to 20 mol% of the monomer (ma), 20 to 40 mol% of the monomer (mb), 15 to 40 ru% of the monomer (mc), and the monomer (m-). d) It is more preferably 15 to 50 mol%.
  • the chain transfer agent solution is a solution of the chain transfer agent in a solvent (B-2).
  • the chain transfer agent is not particularly limited, but for example, a polyfunctional thiol can be preferably used.
  • a polyfunctional thiol is a compound having two or more mercapto groups in the molecule.
  • the polyfunctional thiol is not particularly limited, and is, for example, thioglycolic acid, 1,2-ethanedithiol, 1,4-bis (3-mercaptobutyryloxy) butane, tetraethylene glycolbis (3-mercaptopropionate).
  • Trimethylolethane (3-mercaptobutyrate), trimethylolpropanetris (3-mercaptobutyrate), trimethylolpropanetris (3-mercaptopropionate), pentaerythritol tetrakis (3-mercaptobutyrate), Pentaerythritol tetrakis (3-mercaptopropionate), 1,3,5-tris (3-mercaptobutyloxyethyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -trion , Tris-[(3-mercaptopropionyloxy) -ethyl] -isocyanurate, dipentaethritol hexakis (3-mercaptopropionate) and the like.
  • the chain transfer agents include pentaerythritol tetrakis (3-mercaptobutyrate) and / or thioglycolic acid and pentaerythritol tetrakis (3-mercaptopropio) from the viewpoint of availability, cost and quality. Nate) is preferably used.
  • the concentration of the chain transfer agent in the polymerization initiator solution is preferably a concentration at which a mixed solution having a uniform concentration can be easily obtained, and is, for example, 0.1 to 10% by mass, and is not particularly limited.
  • the amount of the chain transfer agent solution to be used is preferably such that the amount of the chain transfer agent contained in the mixed solution is, for example, 0.5 to 20 parts by mass with respect to 100 parts by mass of the total amount of the monomer charged. More preferably, the amount is 1.0 to 10 parts by mass.
  • the total amount of the monomer charged is, that is, the mass of the monomer (ma) to the monomer (md) in the monomer solution.
  • solvent (B-2) As the solvent (B-2) used in the dropping polymerization step (II), the same solvent as the solvent (B-1) used in the solvent heating step (I) can be used. Like the solvent (B-1), the solvent (B-2) may be only a hydroxy group-containing solvent, may be only a hydroxy group-free solvent, or may be a hydroxy group-containing solvent and hydroxy. It may contain both groups-free solvents.
  • the solvent (B-2) preferably contains a hydroxy group-containing solvent containing a hydroxy group, and more preferably only a hydroxy group-containing solvent.
  • either one or both of the solvent (B-1) and the solvent (B-2) contains a hydroxy group-containing solvent. Therefore, when the solvent (B-1) used in the solvent heating step (I) does not contain a hydroxy group-containing solvent, the solvent (B-2) used in the dropping polymerization step (II) is a hydroxy group-containing solvent. include.
  • the content ratio of the hydroxy group-containing solvent contained in the total amount of the solvent (B-1) used in the solvent heating step (I) and the solvent (B-2) used in the dropping polymerization step (II) is 10 to 100. It is preferably by mass, more preferably 20 to 90% by mass, and even more preferably 40 to 80% by mass.
  • the content of the hydroxy group-containing solvent is 10% by mass or more, the ester group and the monomer (mb) derived from the monomer (ma) in the dropping polymerization step (II) and / or the post-polymerization step (III). ) Sufficiently obtains the effect of inhibiting the ester exchange reaction with the hydroxy group derived from).
  • the copolymer ( A) When one or both of the solvent (B-1) and the solvent (B-2) contain a solvent containing no hydroxy group, when the content ratio of the hydroxy group-containing solvent is 90% by mass or less, the copolymer ( A) The residual amount of the ester group derived from the monomer (ma) in the resin composition is improved to form the ester group and the monomer (mb) derived from the monomer (ma) when the resin composition is cured. The effect of improving the amount of the cross-linking reaction by the ester exchange reaction with the derived hydroxy group can be obtained.
  • the solvent (B-1) used in the solvent heating step (I) and / or the solvent (B-2) used in the dropping polymerization step (II) contains a hydroxy group-containing solvent.
  • the monomers (ma) (mb) (mc) and, if necessary, the monomer (md) used are polymerized at 60 to 90 ° C.
  • the ester group derived from the monomer (ma) easily undergoes an ester exchange reaction with the hydroxy group of the hydroxy group-containing solvent.
  • the monomer (ma) has a group represented by the formula (1)
  • the produced compound has a group.
  • the group that has reacted with R 1 in the formula (1) becomes a steric disorder, and the ester exchange reaction between R 2 and the hydroxy group in the formula (1) is less likely to occur.
  • the monomer (ma) has a group represented by the formula (1)
  • only a part of the ester groups derived from the monomer (ma) is a hydroxy group contained in the hydroxy group-containing solvent. It is presumed that the ester group derived from the monomer (ma) remains moderately after the ester exchange reaction with the monomer (ma).
  • the ester group derived from the monomer (ma) and the hydroxy group contained in the hydroxy group-containing solvent are esterified. Since the exchange reaction occurs, the ester exchange reaction between the ester group derived from the monomer (ma) and the hydroxy group derived from the monomer (mb) is appropriately inhibited. Therefore, in the post-polymerization step (III), it is possible to prevent the copolymer (A) during production from gelling. In addition, the storage stability of the resin composition containing the copolymer (A) is improved.
  • the ester exchange reaction in the dropping polymerization step (II) and / or the post-polymerization step (III) is appropriately inhibited to heat the resin composition containing the copolymer (A). It is possible to prevent a decrease in the ester group derived from the monomer (ma) and the hydroxy group derived from the monomer (mb) before curing. Therefore, the copolymer (A) in which the ester group derived from the monomer (ma) and the hydroxy group derived from the monomer (mb) are appropriately left can be obtained.
  • the compound produced by transesterification of the ester group derived from the monomer (ma) and the hydroxy group of the hydroxy group-containing solvent has a crosslinked structure by transesterifying with the monomer (mb). Generate. Therefore, by thermosetting the resin composition containing the copolymer (A), the ester group derived from the monomer (ma) and the hydroxy group derived from the monomer (mb) are exchanged with each other. A crosslinked structure is sufficiently produced, and a cured product having good solvent resistance can be obtained.
  • the amount of the solvent (B-1) used in the solvent heating step (I) and the solvent (B-2) used in the dropping polymerization step (II) is not particularly limited, but the total amount of the monomer charged (that is, the monomer solution).
  • the total amount of the solvent (B-1) and the solvent (B-2) is 30 to 1,000 with respect to 100 parts by mass of the monomer (ma) to the monomer (md) in the mixture. It is preferably parts by mass, more preferably 50 to 800 parts by mass.
  • the total amount of the solvent (B-1) and the solvent (B-2) is 1,000 parts by mass or less with respect to 100 parts by mass of the total amount of the monomer charged, the common weight obtained in the post-polymerization step (III) is obtained.
  • the viscosity of the reaction solution containing the coalescence (A) becomes appropriate. Further, by setting the total amount of the solvent (B-1) and the solvent (B-2) to 1,000 parts by mass or less, the chain transfer action is performed when the chain transfer agent solution is dropped in the dropping polymerization step (II). It is possible to suppress a decrease in the molecular weight of the copolymer (A) due to the above. Further, by setting the total amount of the solvent (B-1) and the solvent (B-2) to 30 parts by mass or more with respect to 100 parts by mass of the total amount of the monomer charged, abnormal polymerization in the post-polymerization step (III) is performed. The reaction can be prevented and the polymerization reaction can be stably carried out. As a result, it is possible to prevent the copolymer (A) during production from gelling, and the copolymer (A) without coloring can be obtained.
  • the mixed solution obtained in the dropping polymerization step (II) is reacted at 60 to 90 ° C. for 1 to 5 hours while stirring.
  • the reaction time in the post-polymerization step (III) can be 1 to 5 hours, preferably 1 to 4 hours, and more preferably 2 to 3 hours.
  • the copolymer (A) having an appropriate molecular weight can be produced in good yield.
  • the copolymer (A) of the present embodiment has a structural unit (a) having a group represented by the above formula (1) or the above formula (2), a structural unit (b) having a hydroxy group, and an acid group.
  • the glass transition temperature is 30 ° C. or lower. Therefore, the resin composition containing the copolymer (A) of the present embodiment has good alkali developability when used as a photosensitive material, has excellent storage stability, and is cured at a low temperature. However, a cured product having excellent solvent resistance can be obtained.
  • the solvent (B-1) used in the solvent heating step (I) and / or the solvent (B-2) used in the dropping polymerization step (II) is used. It is a solvent containing a hydroxy group-containing solvent.
  • the solvent (B-1) is heated to 60 to 90 ° C.
  • the post-polymerization step (III) the mixed solution is reacted at 60 to 90 ° C.
  • the transesterification reaction between the ester group derived from the monomer (ma) and the hydroxy group derived from the monomer (mb) is carried out. Moderately inhibited.
  • the copolymer of the present embodiment sufficiently containing the structural unit (a) having a group represented by the above formula (1) or the above formula (2) and the structural unit (b) having a hydroxy group. (A) is obtained.
  • the resin composition of the present embodiment contains the copolymer (A) of the present embodiment and the solvent (B).
  • the resin composition of the present embodiment further contains not only the copolymer (A) and the solvent (B), but also the reactive diluent (C) and the photopolymerization initiator (D). May be good.
  • Such a resin composition can be preferably used as a photosensitive resin composition.
  • the resin composition of the present embodiment may further contain a colorant (E) in addition to the above-mentioned copolymer (A) to the photopolymerization initiator (D).
  • Such a resin composition can be preferably used as a material for forming a coloring pattern such as a color filter, a black matrix, and a black column spacer.
  • the solvent (B) contains a hydroxy group-containing solvent.
  • the solvent (B) may be only a hydroxy group-containing solvent.
  • the hydroxy group of the contained solvent undergoes an ester exchange reaction, and the ester exchange reaction between the ester group of the constituent unit (a) and the hydroxy group of the constituent unit (b) is appropriately inhibited, and the storage stability is improved. ..
  • the hydroxy group-containing solvent used as the solvent (B) is not particularly limited as long as it is a hydroxy group-containing solvent, and the solvent (B-1) and the solvent (B-) are used in the step of producing the copolymer (A).
  • the same as the one that can be used as 2) can be used.
  • the content ratio of the hydroxy group-containing solvent in the solvent (B) can be set in the same manner as the content ratio of the hydroxy group-containing solvent in the solvent (B-1) used in the step of producing the copolymer (A).
  • the solvent (B) may be the same as or different from the solvent (B-1) and / or the solvent (B-2) used in the step of producing the copolymer (A).
  • the resin composition of the present embodiment is the same as the copolymer (A) isolated from the reaction solution containing the copolymer (A) obtained in the post-polymerization step (III) for producing the copolymer (A).
  • the reaction solution containing the copolymer (A) obtained when the copolymer (A) is produced may be used as it is. In this case, it is not necessary to isolate the copolymer (A) from the reaction solution.
  • the solvent (B-1) and / or the solvent (B-2) used for producing the copolymer (A) is contained in the reaction solution, the solvent (B-1) in the reaction solution is contained.
  • And / or the solvent (B-2) can be used as it is as the solvent (B). If necessary, the solvent (B) may be added to the reaction solution.
  • the blending amounts of the copolymer (A) and the solvent (B) may be appropriately adjusted according to the purpose of use of the resin composition.
  • the resin composition of the present embodiment for example, it is preferable to contain 30 to 1,000 parts by mass of the solvent (B) with respect to 100 parts by mass of the copolymer (A), and more preferably 50 to 800 parts by mass. preferable.
  • the content of the solvent (B) is 30 parts by mass or more, the viscosity of the resin composition becomes appropriate.
  • the blending amount of the solvent (B) to 30 parts by mass or more, an abnormal polymerization reaction can be prevented, curing as a resin composition can be stably performed, and coloring and gel of the resin composition can be performed. It is possible to prevent the conversion.
  • the content of the solvent (B) is 1,000 parts by mass or less, the viscosity of the resin composition can be controlled in an appropriate range.
  • the reactive diluent (C) is contained together with the photopolymerization initiator (D), if necessary.
  • the reactive diluent (C) is a compound having at least one polymerizable ethylenically unsaturated group as a polymerizable functional group in the molecule.
  • the reactive diluent (C) may be a monofunctional monomer or a polyfunctional monomer, and is preferably a polyfunctional monomer having a plurality of polymerizable functional groups.
  • Examples of the monofunctional monomer used as the reactive diluent (C) include (meth) acrylamide, methylol (meth) acrylamide, methoxymethyl (meth) acrylamide, ethoxymethyl (meth) acrylamide, propoxymethyl (meth) acrylamide, and butoxymethoxy.
  • (Meta) acrylates aromatic vinyl compounds such as styrene, ⁇ -methylstyrene, ⁇ -chloromethylstyrene, vinyltoluene; and carboxylic acid esters such as vinyl acetate and vinyl propionate can be mentioned. These monofunctional monomers may be used alone or in combination of two or more.
  • Examples of the polyfunctional monomer used as the reactive diluent (C) include ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, and polypropylene glycol.
  • (meth) acrylates such as tri (meth) acrylate of tris (hydroxyethyl) isocyanurate; divinylbenzene, diallylphthalate, diallyl.
  • Aromatic vinyl compounds such as benzenephosphonate; dicarboxylic acid esters such as divinyl adipate; triallyl cyanurate, methylenebis (meth) acrylamide, (meth) acrylamide methylene ether, polyhydric alcohols and N-methylol (meth) acrylamide. Examples thereof include the condensate of.
  • These polyfunctional monomers may be used alone or in combination of two or more.
  • a polyfunctional (meth) acrylate as the reactive diluent (C), and trimethylolpropane tri (meth) acrylate
  • the blending amount of each component is the same weight with respect to 100 parts by mass of the total amount of the copolymer (A) and the reactive diluent (C).
  • the coalescence (A) is preferably 10 to 90 parts by mass
  • the solvent (B) is preferably 30 to 1,000 parts by mass
  • the reactive diluent (C) is preferably 10 to 90 parts by mass
  • the copolymer (A) is. It is more preferable that the amount 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 copolymer (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 resin composition has an appropriate viscosity and can be suitably used for various coatings, adhesives, binders for printing inks and the like.
  • the photopolymerization initiator (D) is not particularly limited, and is, for example, benzophenones such as benzoin, benzoin methyl ether, benzoin ethyl ether, and benzoin butyl ether; acetophenone, 2,2-dimethoxy-2-phenylacetophenone, 1,1.
  • the content thereof is 0.1 to 100 parts by mass with respect to 100 parts by mass of the total amount of the copolymer (A) and the reactive diluent (C). It is preferably 30 parts by mass, more preferably 0.5 to 20 parts by mass, and even more preferably 1 to 15 parts by mass.
  • the colorant (E) is contained as needed.
  • 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 colorant (E) may be used alone or in combination of two or more, depending on the color of the cured product of the target resin composition. As the colorant (E), only the dye may be used, only the pigment may be used, or the dye and the pigment may be used in combination.
  • the dye examples include acidic dyes having an acidic group such as carboxylic acid and sulfonic acid from the viewpoints of solubility in the solvent (B) and the alkaline developing solution, interaction with other components in the resin composition, heat resistance, and the like. It is preferable to use a salt of the acidic dye with the nitrogen compound, a sulfonamide of the acidic dye, or the like.
  • dyes examples 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 violet K; acid Fuchsin; acid green 1, 3, 5, 25, 27, 50; acid orange 6, 7, 8, 10, 12, 50, 51, 52, 56, 63, 74, 95; acid red1, 4, 8, 14, 17, 18, 26, 27, 29, 31, 34, 35, 37, 42, 44, 50, 51, 52, 57, 69, 73.
  • dyes it is preferable to use azo-based, xanthene-based, anthraquinone-based or phthalocyanine-based acid dyes. These dyes may be used alone or in combination of two or more, depending on the color of the cured product of the target resin composition.
  • 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; C.I. I. Pigment Orange 13, 31, 36, 38, 40, 42, 43, 51, 55, 59, 61, 64, 65, 71, 73 and other orange pigments; I.
  • a known dispersant may be contained in the resin composition from the viewpoint of improving the dispersibility of the pigment.
  • the dispersant it is preferable to use a polymer dispersant having excellent 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. Examples include system dispersants.
  • EFKA manufactured by EFKA
  • Disperbyk-161 manufactured by Big Chemie
  • Disparon manufactured by Kusumoto Kasei Co., Ltd.
  • SOLPERSE manufactured by Zeneca. You may use what has been done.
  • the type and blending amount of the dispersant may be appropriately set according to the type of pigment to be used and the like.
  • the content thereof is 3 to 80 parts by mass with respect to 100 parts by mass of the total amount of the copolymer (A) and the reactive diluent (C). Is preferable, 5 to 70 parts by mass is more preferable, and 10 to 60 parts by mass is further preferable.
  • the resin composition containing the copolymer (A) of the present embodiment has excellent storage stability, and a cured product having excellent solvent resistance can be obtained even when cured at a low temperature. Therefore, for example, the content of the colorant (E) can be 20 parts by mass or more with respect to 100 parts by mass of the total amount of the copolymer (A) and the reactive diluent (C). By using the resin composition containing 20 parts by mass or more of the colorant (E) as a material of the color filter, the color reproducibility in the image display element provided with the color filter can be enhanced.
  • the resin composition of the present embodiment may contain known additives such as a coupling agent, a leveling agent, and a thermal polymerization inhibitor in order to impart predetermined properties.
  • additives such as a coupling agent, a leveling agent, and a thermal polymerization inhibitor in order to impart predetermined properties.
  • the blending amount of these additives is not particularly limited as long as it does not impair the effects of the present invention.
  • the resin composition of the present embodiment contains the copolymer (A) of the present embodiment, the crosslinking reaction proceeds sufficiently even at a low temperature. Therefore, the resin composition of the present embodiment can be cured at a low temperature. Specifically, the resin composition of the present embodiment is preferably cured at a temperature of 150 ° C. or lower, more preferably 100 ° C. or lower, and most preferably 80 ° C. or lower. When the temperature at which the resin composition is cured is 150 ° C. or lower, the amount of energy required to cure the resin composition is small.
  • the resin composition contains a colorant (E) having inferior heat resistance
  • deterioration of the colorant (E) due to heat curing can be suppressed, and a cured product exhibiting the original characteristics of the colorant (E) can be obtained. Easy to get rid of. Therefore, as the colorant (E), those made of various materials can be used.
  • a cured product is formed by a method of applying a resin composition on a substrate and thermally curing the substrate, the cured product can be formed even if the substrate is made of a material having inferior heat resistance. Therefore, as the substrate, for example, a substrate made of various materials such as a resin for a flexible display can be used.
  • the resin composition of the present embodiment is preferably cured at a temperature of 50 ° C. or higher, more preferably 60 ° C. or higher, and even more preferably 70 ° C. or higher.
  • the temperature at which the resin composition is cured is 50 ° C. or higher, a crosslinked structure is sufficiently produced by transesterification in a short time, and a cured product having good solvent resistance can be efficiently formed.
  • the heating time (curing time) for curing the resin composition of the present embodiment can be appropriately determined according to the size, thickness, curing temperature, etc. of the cured product, and is, for example, 10 minutes to 4 hours. It can be done, preferably 20 minutes to 2 hours.
  • the resin composition of the present embodiment can be produced by a method of mixing the above components using a known mixing device.
  • the solvent contained in each component used as a raw material in producing the resin composition of the present embodiment can be used as the solvent (B).
  • the resin composition of the present embodiment contains components other than the copolymer (A) and the solvent (B), for example, in the resin composition containing the copolymer (A) and the solvent (B) prepared in advance. , The reactive diluent (C), the photopolymerization initiator (D), and the colorant (E) may be added and mixed.
  • the resin composition of the present embodiment contains the copolymer (A) of the present embodiment, a cured product having excellent storage stability and excellent solvent resistance even when cured at a low temperature can be obtained. .. Therefore, the resin composition of the present embodiment is, for example, a color filter, a black matrix, a color filter protective film, a photo spacer, a protrusion for liquid crystal alignment, a microlens, an insulating film for a touch panel, and an adhesive for electronic materials around a flexible printed wiring board. It can be preferably used as a material for agents, adhesive sheets and the like.
  • the resin composition of the present embodiment contains the copolymer (A) of the present embodiment, the solvent (B), the reactive diluent (C), and the photopolymerization initiator (D), it is alkaline. It can be preferably used as a photosensitive material having good developability. In particular, for organic electroluminescence (EL) displays (for black Pixel Defining Layer (PDL)), liquid crystal displays, charge-coupled devices (CCD), and solid-state imaging devices using complementary metal oxide semiconductor (CMOS) elements. It is suitable as a resist used for a built-in color filter.
  • EL organic electroluminescence
  • LCD liquid crystal displays
  • CCD charge-coupled devices
  • CMOS complementary metal oxide semiconductor
  • the resin composition of the present embodiment contains the copolymer (A) of the present embodiment, the solvent (B), the reactive diluent (C), the photopolymerization initiator (D), and the colorant (
  • E) When E is contained, a colored pattern made of a cured product having excellent solvent resistance can be formed at a low temperature. Therefore, deterioration of the colorant (E) due to heat curing is suppressed, and a coloring pattern in which the original characteristics of the colorant (E) are exhibited can be formed. Therefore, the above resin composition can be preferably used as a photosensitive material for a color filter.
  • the color filter of the present embodiment includes a substrate, a plurality of pixels composed of three coloring patterns of a red (R) pattern, a green (G) pattern, and a blue (B) pattern formed on the substrate, and each coloring pattern. It has a black matrix formed at the boundary and a protective film formed on the pixels and the black matrix.
  • a known substrate can be adopted, and for example, 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 is used. be able to.
  • an organic substrate such as a polycarbonate substrate, a polyester substrate, a polyamide substrate, a polyamide-imide substrate, or a polyimide substrate having a relatively low heat resistant temperature can be used, which is suitable as a flexible substrate. ..
  • the black matrix and the three coloring patterns forming each pixel are the copolymer (A) of the present embodiment, the solvent (B), and the reactive diluent (C).
  • a coloring pattern comprising a cured product of the resin composition of the present embodiment containing a photopolymerization initiator (D) and a coloring agent (E).
  • the protective film is not particularly limited, and a known one can be used.
  • a coloring pattern to be a black matrix and three coloring patterns forming each pixel are formed on a substrate.
  • a coloring pattern that becomes a black matrix is formed on the substrate, and then a red pattern, a green pattern, and a blue pattern that form each pixel are formed within the range partitioned by the black matrix.
  • the order in which the red pattern, the green pattern, and the blue pattern are formed is not particularly limited.
  • Each coloring pattern can be formed by a photolithography method using the resin composition of the present embodiment.
  • the resin composition of the present embodiment is applied onto the substrate to form a coating film.
  • the coating film is exposed through a photomask having a predetermined pattern shape, and the exposed portion is photocured.
  • the unexposed portion of the coating film is alkaline-developed with an alkaline aqueous solution and removed.
  • the exposed portion of the coating film is heated and cured.
  • the method of applying the resin composition for forming the coloring pattern is not particularly limited, and for example, a screen printing method, a roll coating method, a curtain coating method, a spray coating method, a spin coating method, or the like is used. Can be done.
  • the solvent (B) contained in the coating film is volatilized by heating the coating film using a heating means such as a circulating oven, an infrared heater, or a hot plate, if necessary. May be removed.
  • the heating for removing the solvent (B) in the coating film can be performed at a temperature of, for example, 50 ° C to 120 ° C. Further, heating for removing the solvent (B) in the coating film can be performed, for example, for 30 seconds to 30 minutes.
  • the heating temperature and heating time for removing the solvent (B) in the coating film can be appropriately set according to the composition of the resin composition, the thickness of the coating film, and the like.
  • a known negative type mask can be used as the photomask.
  • active energy rays such as ultraviolet rays and excimer laser light.
  • the light source used for the exposure is not particularly limited, and for example, 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 energy dose to be applied to the coating film can be appropriately selected depending on the thickness of the coating film, the composition of the resin composition, and the like, and can be, for example, 30 to 2000 mJ / cm 2 .
  • the alkaline aqueous solution used for alkaline development is not particularly limited, and is, for example, an aqueous solution of sodium carbonate, potassium carbonate, calcium carbonate, sodium hydroxide, potassium hydroxide and the like; amine-based compounds such as ethylamine, diethylamine and dimethylethanolamine.
  • An aqueous solution of a p-phenylenediamine-based compound or the like can be used, and can be appropriately selected depending on the composition of the resin composition and the like. If necessary, an additive such as a defoaming agent and a surfactant may be added to these alkaline aqueous solutions. Further, in the present embodiment, it is preferable to wash the substrate with water after alkaline development with an alkaline aqueous solution and before baking to remove the alkaline aqueous solution and dry the substrate.
  • the temperature at which the exposed portion of the coating film is heated and cured by baking can be appropriately selected according to the thickness of the coating film, the composition of the resin composition, and the like.
  • the coating film is formed by using the resin composition containing the copolymer (A) of the present embodiment, the exposed portion of the coating film can be cured even at a low temperature.
  • the temperature for heating the exposed portion of the coating film can be, for example, 210 ° C or lower, 150 ° C or lower, 100 ° C or lower, or even 80 ° C or lower, if necessary.
  • a material having low heat resistance such as a substrate having low heat resistance can be used as the material for the color filter.
  • the temperature for heating the exposed portion of the coating film is 150 ° C. or lower, the amount of energy required to cure the coating film is small, which is preferable. Further, when the temperature at which the exposed portion of the coating film is heated is set to 150 ° C.
  • the coloring pattern containing the coloring agent (E) having inferior heat resistance which has been difficult to use as a material for the coloring pattern in the past, is deteriorated by the coloring agent (E). Can be formed while suppressing.
  • the temperature for heating the exposed portion of the coating film is set to 150 ° C. or lower, a coloring pattern can be formed on a substrate having poor heat resistance, which has been difficult to use as a substrate for a conventional color filter.
  • the temperature for heating the exposed portion of the coating film is preferably 50 ° C. or higher, more preferably 60 ° C. or higher, and even more preferably 70 ° C. or higher.
  • the temperature at which the exposed portion of the coating film is heated is 50 ° C. or higher, the copolymer (A) and the reactive diluent (C) are sufficiently crosslinked, so that the solvent resistance of the coloring pattern becomes good, which is good. A pattern shape is obtained.
  • the temperature for heating the exposed portion of the coating film is 50 ° C. or higher, the exposed portion of the coating film can be heated in a short time, and a colored pattern can be efficiently produced.
  • the time for heating the exposed portion of the coating film can be appropriately selected depending on the temperature for heating the exposed portion of the coating film, the thickness of the coating film, the composition of the resin composition, and the like, for example, 10 minutes to 4 hours. It can be done, preferably 20 minutes to 2 hours.
  • a protective film is formed by a known method on a coloring pattern that becomes a black matrix and three coloring patterns that form each pixel.
  • the three coloring patterns and the black matrix forming each pixel are composed of the copolymer (A), the solvent (B), and the reactive diluent (C) of the present embodiment.
  • a coloring pattern comprising a cured product of the resin composition of the present embodiment containing a photopolymerization initiator (D) and a coloring agent (E).
  • the resin composition of the present embodiment has good alkali developability, and a cured product having excellent solvent resistance can be obtained even when cured at a low temperature. Therefore, in the color filter of the present embodiment, the pixels and the black matrix can be formed by using the method of curing the resin composition at a low temperature, and the selection of materials that can be used for the color filter can be increased.
  • the color filter of the present embodiment may have, for example, a pixel and / or a black matrix containing a colorant (E) having a poor heat resistance and having a good pattern shape. Further, by forming the pixels and the black matrix by using a method of curing the resin composition at a low temperature, a color filter having a substrate made of a material having inferior heat resistance can be obtained.
  • the temperature at which the exposed portion of the coating film is heated and cured is less than 210 ° C.
  • the solvent resistance of the colored pattern, which is a cured product, is insufficient. Therefore, when the coloring pattern is formed using the conventional resin composition, the temperature for heating the exposed portion of the coating film cannot be set to 210 ° C. or lower. Therefore, in the conventional technique, it is difficult to use the colorant (E) having inferior heat resistance as the material of the coloration pattern. Further, it is difficult to use a substrate having inferior heat resistance as the substrate of the color filter.
  • the coloring pattern is the copolymer (A) of the present embodiment, the solvent (B), the reactive diluent (C), the photopolymerization initiator (D), and the coloring.
  • the case of having a pixel and a black matrix made of a cured product of the resin composition containing the agent (E) has been described as an example.
  • the photopolymerization initiator (D) instead of the photopolymerization initiator (D), a resin composition containing a curing accelerator and a known epoxy resin may be used.
  • the coloring pattern can be formed by the method shown below.
  • the resin composition is applied onto the substrate by an inkjet method to form a coating film having a predetermined pattern shape.
  • the coating film is heated and cured.
  • a resin composition containing a curing accelerator and a known epoxy resin instead of the photopolymerization initiator (D) can also be cured at a low temperature to obtain a cured product having excellent solvent resistance. Therefore, even in this case, the pixels and the black matrix can be formed by using the method of curing the resin composition at a low temperature, and the choice of materials that can be used for the color filter can be increased.
  • the image display element of this embodiment for example, a first substrate having a color filter and a first electrode formed on the surface and a second substrate having a second electrode formed on the surface thereof can be used. Examples thereof include a device in which a first electrode and a second electrode are arranged so as to face each other via a spacer, and a liquid crystal composition is sandwiched between the first substrate and the second substrate.
  • the liquid crystal display element of the present embodiment includes the color filter of the present embodiment as the color filter.
  • known members other than the color filter can be used.
  • the liquid crystal display element of the present embodiment can be manufactured, for example, by using the manufacturing method shown below. First, a color filter and a first electrode are formed on the first substrate in this order.
  • the color filter can be formed by using the manufacturing method described above.
  • the first electrode can be formed by using a known method.
  • the second electrode and the spacer are formed on the second substrate by a known method. After that, the first substrate and the second substrate are arranged and bonded with the first electrode and the second electrode facing each other, and the liquid crystal composition is injected and sealed between the first substrate and the second substrate.
  • the liquid crystal display element of the present embodiment can be obtained.
  • the liquid crystal display element of the present embodiment includes the color filter of the present embodiment, the pixels of the color filter and the black matrix can be formed by using a method of curing the resin composition at a low temperature. Therefore, as a material that can be used for the liquid crystal display element, it is possible to use a material having inferior heat resistance, and it is possible to increase the choices of usable materials.
  • a liquid crystal display element has been described as an example of the image display element of the present embodiment, but the image display element of the present embodiment may include the color filter of the present embodiment. It is not limited to the liquid crystal display element.
  • the image display element of the present embodiment may be, for example, an organic EL display element, a solid-state image pickup device using a CCD element / CMOS element.
  • 2-Ethylhexyl acrylate (2EHA) (mol%) was dissolved in 60.5 g of propylene glycol monomethyl ether as a solvent (B-2) and then mixed to prepare a monomer solution. After that, the polymerization initiator solution and the monomer solution were added dropwise to the flask containing the solvent (B-1h) heated to 78 ° C. while stirring the solvent (B-1h) in the flask. The drop polymerization was carried out simultaneously by dropping the mixture into a mixed solution (drop polymerization step (II)). The dropping rate was 1.7 ml / min for both the polymerization initiator solution and the monomer solution.
  • the mixed solution was reacted at 78 ° C. for 3 hours while stirring to form the copolymer (A) (post-polymerization step (III)).
  • Propylene glycol monomethyl ether as the solvent (B) was added to the reaction solution containing the copolymer (A) thus obtained so that the content other than the solvent was 35% by mass, and the weight of Synthesis Example 1 was increased. A coalesced composition was obtained.
  • the polymerization initiator solution and the monomer solution were added dropwise to the flask containing the solvent (B-1h) heated to 78 ° C. while stirring the solvent (B-1h) in the flask.
  • the drop polymerization was carried out simultaneously by dropping the mixture into a mixed solution (drop polymerization step (II)).
  • the dropping rate was 1.7 ml / min for both the polymerization initiator solution and the monomer solution.
  • the mixed solution was reacted at 78 ° C. for 3 hours while stirring to form the copolymer (A) (post-polymerization step (III)).
  • Propylene glycol monomethyl ether as the solvent (B) was added to the reaction solution containing the copolymer (A) thus obtained so that the content other than the solvent was 35% by mass, and the weight of Synthesis Example 12 was increased. A coalesced composition was obtained.
  • (ma) represents a monomer having a group represented by the above formula (1) or the above formula (2).
  • (Mb) represents a hydroxy group-containing monomer.
  • (Mc) indicates an acid group-containing monomer.
  • (D) indicates other monomers that do not correspond to (ma), (mb), and (mc).
  • (the equivalent number of the formulas (1) and (2)) is represented by the above formula (1) or the above formula (2) contained in the molecule of the copolymer (A). The number of equivalents of the group is shown.
  • MOI-DEM Karens (registered trademark) MOI-DEM (reaction product of 2-isocyanatoethyl methacrylate and diethyl malonate, manufactured by Showa Denko KK)
  • AOI-DEM Karenz (registered trademark) AOI-DEM (reaction product of 2-isocyanatoethyl acrylate and diethyl malonate, manufactured by Showa Denko KK) ⁇ 4-Hydroxybutyl acrylate (manufactured by Mitsubishi Chemical Corporation) ⁇ 2-Hydroxyethyl methacrylate (manufactured by Kyoeisha Chemical Co., Ltd.) ⁇ 2-Hydroxyethyl acrylate (manufactured by Kyoeisha Chemical Co., Ltd.) ⁇ 2-Hydroxypropyl acrylate (HOP-A (N)) (manufactured by Kyoeish
  • ⁇ 2EHA 2-Ethylhexyl acrylate (manufactured by Toagosei Co., Ltd.) -TCDMA: Tricyclo [5.2.1.0 2,6 ] decanyl-8-methacrylate (manufactured by Hitachi Chemical Co., Ltd.) ⁇ GMA: Glycidyl methacrylate (manufactured by NOF CORPORATION)
  • MOI-BP Karenz (registered trademark) MOI-BP (2-[(3,5-dimethylpyrazolyl) carbonylamino] ethyl methacrylate, manufactured by Showa Denko KK)
  • MOI-BM Karenz (registered trademark) MOI-BM (2-"0- (1'-methylpropanolamino) carboxyamino] ethylmethacrylate, manufactured by Showa Denko KK)
  • ⁇ Weight average molecular weight (Mw)> The weight average molecular weight (Mw) of each of the copolymers (A) contained in the polymer compositions of Synthesis Examples 1 to 12 and Comparative Synthesis Examples 1 to 3 was measured.
  • the weight average molecular weight is a standard polystyrene-equivalent weight average molecular weight measured under the following conditions using gel permeation chromatography (GPC).
  • Tg Glass transition temperature
  • the polymer compositions of Synthesis Examples 1 to 12 and Comparative Synthesis Examples 1 to 3 were applied to a glass substrate and dried at 50 ° C. under reduced pressure for 24 hours. Then, it was redissolved in acetone and dried again at 50 ° C. under reduced pressure for 24 hours.
  • DSC differential scanning calorimetry, measuring instrument: Seiko DSC6200
  • JIS- JIS- at a temperature rise rate of 10 ° C./min under a nitrogen stream. Measured according to K7121 (midpoint glass transition point). The obtained result was taken as the glass transition temperature (Tg) of the copolymer (A).
  • the viscosity increase rate of the viscosity after standing for 3 months with respect to the viscosity before standing in the incubator ⁇ (1- (Viscosity after standing for 3 months / Viscosity before standing) Viscosity)) ⁇ 100 (%) ⁇ was calculated and evaluated according to the criteria shown below.
  • ⁇ Thickness increase rate 10% or less
  • ⁇ Thickness increase rate 10.1% to 20%
  • the polymer compositions of Synthesis Examples 1 to 12 and Comparative Synthesis Examples 1 to 3 all have an evaluation of storage stability of ⁇ or ⁇ , and have excellent storage stability. I was able to confirm that it was done.
  • the acid values of the polymer compositions of Synthesis Examples 1 to 12 and Comparative Synthesis Examples 1 to 3 were measured and used as the acid value of the copolymer (A).
  • the copolymer (A) shown in Table 4 does not include the amount of the solvent contained in the reaction solution used for producing the copolymer (A).
  • the amount of the solvent (B) shown in Table 4 is the sum of the solvent contained in the polymer composition (propylene glycol monomethyl ether) and the solvent added during the production of the resin composition (propylene glycol monomethyl ether acetate). Is.
  • the content ratio of the hydroxy group-containing solvent in the solvent (B) shown in Table 4 is 79.1% by mass.
  • the resin compositions of Examples 1 to 12 and Comparative Examples 1 to 3 were evaluated for alkali developability and solvent resistance by the methods shown below.
  • (1) Alkaline Developability The resin compositions of Examples and Comparative Examples are placed on a square glass substrate (non-alkali glass substrate) having a length of 5 cm and a width of 5 cm, respectively, and have a thickness of 2.5 ⁇ m after exposure.
  • the coating film was formed by spin coating as described above. Then, the solvent in the coating film was volatilized and removed by heating at 100 ° C. for 3 minutes.
  • a photomask having a predetermined pattern is placed at a distance of 100 ⁇ m from the coating film, and the coating film is exposed to ultraviolet rays having a wavelength of 365 nm at an energy dose of 40 mJ / cm 2 through the photomask to expose the exposed portion. It was photocured. Next, an aqueous solution containing 0.1% by mass of sodium carbonate was sprayed at a temperature of 23 ° C. and a pressure of 0.3 MPa to dissolve and develop the unexposed portion. Then, it was baked at 100 ° C. for 20 minutes to form a predetermined pattern.
  • the coating film was exposed to ultraviolet rays having a wavelength of 365 nm at an energy dose of 40 mJ / cm 2 , and the exposed portion was photocured. Then, the coating film was cured by baking at 80 ° C. for 30 minutes or 100 ° C. for 20 minutes to obtain a cured film.
  • the prepared cured film was immersed in 20 g of propylene glycol monomethyl ether at 23 ° C. for 15 minutes, and the color change ( ⁇ Eab) before and after the immersion was measured with a spectrophotometer UV-1650PC (manufactured by Shimadzu Corporation). The solvent resistance was evaluated based on the above. The results are shown in Table 5.
  • the cured films obtained by curing the resin compositions of Examples 1 to 12 had a good evaluation of alkali developability. Further, in the cured film obtained by curing the resin compositions of Examples 1 to 12, the temperature for curing the coating film was 80 ° C. and the time was 30 minutes, and the temperature was 100 ° C. and the time was 20 minutes. In all of these cases, ⁇ Eab was less than 3, and the solvent resistance was good.
  • the cured film obtained by curing the resin compositions of Comparative Examples 1 to 3 had a good evaluation of alkali developability, but when the temperature at which the coating film was cured was 80 ° C. and the time was 30 minutes. ⁇ Eab was 3 or more, and the solvent resistance was insufficient.
  • a resin composition capable of obtaining a cured product having good alkali developability when used as a photosensitive material, excellent storage stability, and excellent solvent resistance even when cured at a low temperature.
  • a product, a copolymer useful for preparing the resin composition, and a method for producing the copolymer are provided.
  • an image display element including the color filter thereof.
  • the resin composition of the present invention can be preferably used in a wide range of applications as a material such as a transparent film, a protective film, an insulating film, an overcoat, a photo spacer, a black matrix, a black column spacer, and a resist for a color filter.

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