WO2013057918A1 - 新規共重合体 - Google Patents
新規共重合体 Download PDFInfo
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- WO2013057918A1 WO2013057918A1 PCT/JP2012/006596 JP2012006596W WO2013057918A1 WO 2013057918 A1 WO2013057918 A1 WO 2013057918A1 JP 2012006596 W JP2012006596 W JP 2012006596W WO 2013057918 A1 WO2013057918 A1 WO 2013057918A1
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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
- 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
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
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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
- C08F293/00—Macromolecular compounds obtained by polymerisation on to a macromolecule having groups capable of inducing the formation of new polymer chains bound exclusively at one or both ends of the starting macromolecule
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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
- C08F297/00—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer
- C08F297/02—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type
- C08F297/026—Macromolecular compounds obtained by successively polymerising different monomer systems using a catalyst of the ionic or coordination type without deactivating the intermediate polymer using a catalyst of the anionic type polymerising acrylic acid, methacrylic acid or derivatives thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F299/00—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers
- C08F299/02—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates
- C08F299/04—Macromolecular compounds obtained by interreacting polymers involving only carbon-to-carbon unsaturated bond reactions, in the absence of non-macromolecular monomers from unsaturated polycondensates from polyesters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0001—Post-treatment of organic pigments or dyes
- C09B67/0002—Grinding; Milling with solid grinding or milling assistants
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0071—Process features in the making of dyestuff preparations; Dehydrating agents; Dispersing agents; Dustfree compositions
- C09B67/0084—Dispersions of dyes
- C09B67/0085—Non common dispersing agents
- C09B67/009—Non common dispersing agents polymeric dispersing agent
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
- C08F290/062—Polyethers
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
Definitions
- the present invention relates to a novel copolymer useful as a dispersant, particularly to a block copolymer having a tertiary amino group.
- Copolymer type pigment dispersants have been developed in various fields.
- a copolymer type pigment dispersant is used when a color filter is produced by a pigment dispersion method. Performances such as high contrast and high brightness are required for color filters.
- a pigment having an intrinsic transmission absorption spectrum in the visible light wavelength region and a phosphor emission spectrum of the backlight is preferably used.
- the pigment is used by making it into fine particles having a primary particle size of several tens of nm or less.
- a green pigment and various yellow pigments are used in combination in order to achieve high brightness of the green pixel.
- finely divided pigments are likely to re-aggregate, and pigments in which the above-mentioned green pigments and various yellow pigments are combined are particularly susceptible to instability in the dispersion system, and there is no appropriate dispersant.
- Patent Document 1 proposes a dispersant using a brominated zinc phthalocyanine green pigment for the purpose of increasing the brightness of a green pixel.
- This document is a B block copolymer having a solvophilic A block and a functional group containing a nitrogen atom, and has an amine value of 80 mgKOH / g or more and 150 mgKOH / g or less in terms of effective solid content.
- a dispersant has been proposed.
- the color filter is insufficient in terms of the heat resistance of the green pixel.
- An object of the present invention is to provide a novel copolymer having excellent pigment dispersion performance, and further to provide a novel copolymer that can be used as a pigment dispersant capable of improving the heat resistance of a green pixel in a color filter. It is to be.
- the present inventors include a block chain containing a repeating unit having a tertiary amino group and a block chain containing a repeating unit represented by the following formula (I) And it discovered that said subject could be solved by using the block copolymer whose amine value is 80 mgKOH / g or more and 250 mgKOH / g or less, and came to complete this invention.
- the present invention (1) a block chain (A) containing a repeating unit having a tertiary amino group; Formula (I)
- R 1 represents a hydrogen atom or a C1-C3 alkyl group
- R 2 and R 3 each independently represent a hydrogen atom or a C1-C6 alkyl group
- Q represents an alkyl group as a substituent
- An oxygen-containing saturated heterocyclic group which may have, or a C2-C20 alkenyl group, wherein n represents an integer of 0-6.
- the repeating unit having a tertiary amino group is represented by the following formula (II)
- R 4 represents a hydrogen atom or a C1-C3 alkyl group
- R 5 and R 6 each independently represent a C1-C6 alkyl group or a C6-C10 aryl C1-C6 alkyl group
- X represents , A C1-C10 alkylene group or a C1-C10 alkylene-O—C1-C10 alkylene group
- a copolymer according to the above (1) (3) The ratio according to (1) or (2) above, wherein the ratio (Mw / Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is 1.01 to 2.00.
- copolymer of the present invention contains at least one of the following block chains (A) and block chains (B).
- Block chain (A) includes a repeating unit having a tertiary amino group.
- Block chain (B) includes a repeating unit represented by the formula (I).
- the copolymer of this invention may contain other block chains other than the said block chain (A) and block chain (B).
- Block chain (A) In the block chain (A), the repeating unit having a tertiary amino group is not particularly limited as long as it has the tertiary amino group in the side chain of the repeating unit. Specifically, in the block chain (A), one or two or more repeating units having a tertiary amino group are polymerized and these and other copolymerizable monomer-derived repeating units are copolymerized. Including things. Copolymerization includes random, alternating, block, and the like.
- repeating unit having a tertiary amino group Although there is no restriction
- the repeating unit represented by the following general formula (II) is illustrated.
- R 4 represents a hydrogen atom or a C1-C3 alkyl group
- R 5 and R 6 are each independently a C1-C6 alkyl group or a C6-C10 aryl C1-C6 alkyl group
- X represents a C1-C10 alkylene group or a C1-C10 alkylene-O—C1-C10 alkylene group.
- the C1-C3 alkyl group or the C1-C6 alkyl group includes methyl, ethyl, n-propyl, i-propyl, n-butyl, s-butyl, i-butyl, t-butyl, n-pentyl, n -Hexyl and the like are exemplified.
- Examples of the C1-C10 alkylene group include a methylene chain, an ethylene chain, a propylene chain, a methylethylene chain, a butylene chain, a 1,2-dimethylethylene chain, a pentylene chain, a 1-methylbutylene chain, a 2-methylbutylene chain, and a hexylene chain. Is exemplified.
- C6-C10 aryl C1-C6 alkyl groups include benzyl, phenethyl, 3-phenyl-n-propyl, 1-phenyl-n-hexyl, naphthalen-1-ylmethyl, naphthalen-2-ylethyl, 1-naphthalene-2 Examples include -yl-n-propyl, inden-1-ylmethyl and the like.
- diethylamino Examples include propyl (meth) acrylate, diethylaminobutyl (meth) acrylate, dimethylaminoethoxyethyl (meth) acrylate, dimethylaminoethoxypropyl (meth) acrylate, diethylaminobutoxybutyl (meth) acrylate, and the like.
- repeating units that can be contained examples include repeating units derived from (meth) acrylic acid monomers, aromatic vinyl monomers, conjugated diene monomers, and the like.
- (meth) acrylic acid-based monomer, aromatic vinyl-based monomer, and conjugated diene-based monomer that are the raw materials for the repeating unit include the following.
- (Meth) acrylic acid monomers include (meth) acrylic acid; methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, (meth ) N-butyl acrylate, i-butyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, glycidyl (meth) acrylate, (meth (Meth) acrylate compounds such as cyclohexyl acrylate, 2-ethylhexyl (meth) acrylate, 1-ethylcyclohexyl (meth) acrylate,
- Aromatic vinyl monomers include styrene; o-methyl styrene, p-methyl styrene, pt-butyl styrene, ⁇ -methyl styrene, pt-butoxy styrene, mt-butoxy styrene, p- (1 -Ethoxyethoxy) styrene, 2,4-dimethylstyrene, vinylaniline, vinylbenzoic acid and other styrene derivatives; 2-vinylpyridine, 4-vinylpyridine, 2-vinylquinoline, 4-vinylquinoline, 2-vinylthiophene, 4 -Heteroaryl compounds such as vinylthiophene; vinylnaphthalene, vinylanthracene and the like can be mentioned, and these can be used singly or in combination of two or more.
- Conjugated diene monomers include 1,3-butadiene, isoprene, 2-ethyl-1,3-butadiene, 2-t-butyl-1,3-butadiene, 2-phenyl-1,3-butadiene, 2,3 -Dimethyl-1,3-butadiene, 1,3-pentadiene, 2-methyl-1,3-pentadiene, 3-methyl-1,3-pentadiene, 1,3-hexadiene, 2-methyl-1,3-octadiene 4,5-diethyl-1,3-octadiene, 3-butyl-1,3-octadiene, 1,3-cyclopentadiene, 1,3-cyclohexadiene, 1,3-cyclooctadiene, 1,3-tri Examples thereof include cyclodecadiene, myrcene, chloroprene, and the like. These can be used alone or in combination of two or more.
- Block chain (B) includes those obtained by polymerizing one or more repeating units represented by the formula (I) and those obtained by copolymerizing these and other copolymerizable repeating units derived from a monomer. To do. Copolymerization includes random, alternating, block, and the like.
- the block chain (B) contains at least one repeating unit represented by the following formula (I).
- R 1 represents a hydrogen atom or a C1-C3 alkyl group
- R 2 and R 3 each independently represent a hydrogen atom or a C1-C6 alkyl group
- Q has a substituent.
- n represents an integer of 0-6.
- examples of the C1-C3 alkyl group and the C1-C6 alkyl group for R 1 include the same repeating units having the tertiary amino group as in the formula (II).
- the oxygen-containing saturated heterocyclic group of Q may have a substituent on any carbon atom on the ring.
- the oxygen-containing saturated heterocyclic group means a 3- to 8-membered saturated heterocyclic ring which contains at least one oxygen atom and may further contain one heteroatom selected from N, S and O, preferably It is a 3-6 membered saturated heterocycle.
- examples of the oxygen-containing saturated heterocyclic group include an oxiranyl group, an oxetanyl group, a tetrahydrofuranyl group, a tetrahydropyranyl group, a morpholinyl group, and a thiomorpholinyl group.
- crosslinkable functional groups such as an oxiranyl group, an oxetanyl group, a tetrahydrofuranyl group, and a tetrahydropyranyl group are preferable.
- the substituent of the oxygen-containing saturated heterocyclic group is a C1-6 alkyl group.
- Examples of the C1-C6 alkyl group include the same repeating units having the tertiary amino group as in the formula (II).
- Examples of the C2-C20 alkenyl group of Q include a vinyl group, 1-propenyl group, 2-propenyl group, 1-butenyl group, 2-butenyl group, 3-butenyl group, 1-methyl-2-propenyl group, 2 -Methyl-2-propenyl group, 1-pentenyl group, 2-pentenyl group, 3-pentenyl group, 4-pentenyl group, 1-methyl-2-butenyl group, 2-methyl-2-butenyl group, 1-hexenyl group 2-hexenyl group, 3-hexenyl group, 4-hexenyl group, 5-hexenyl group, heptenyl group, octenyl group, decenyl group, pentadecenyl group, eicosenyl group, tricocenyl group and the like. Of these, a C2-C6 alkenyl group is preferable.
- Examples of the monomer used as a raw material for the repeating unit represented by the formula (I) include oxetane-2-ylmethyl (meth) acrylate, oxetane-3-ylmethyl (meth) acrylate, and (meth) acrylic acid (2-methyloxetane).
- repeating units that can be contained examples include repeating units derived from (meth) acrylic acid monomers, aromatic vinyl monomers, conjugated diene monomers, and the like.
- (meth) acrylic acid-based monomer, aromatic vinyl-based monomer, and conjugated diene-based monomer that are the raw materials for the repeating unit include the following.
- (Meth) acrylic acid monomers include (meth) acrylic acid; methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, i-propyl (meth) acrylate, (meth ) N-butyl acrylate, i-butyl (meth) acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, glycidyl (meth) acrylate, (meth (Meth) acrylate compounds such as cyclohexyl acrylate, 2-ethylhexyl (meth) acrylate, 1-ethylcyclohexyl (meth) acrylate,
- Aromatic vinyl monomers include styrene; o-methyl styrene, p-methyl styrene, pt-butyl styrene, ⁇ -methyl styrene, pt-butoxy styrene, mt-butoxy styrene, p- (1 -Ethoxyethoxy) styrene, 2,4-dimethylstyrene, vinylaniline, vinylbenzoic acid and other styrene derivatives; 2-vinylpyridine, 4-vinylpyridine, 2-vinylquinoline, 4-vinylquinoline, 2-vinylthiophene, 4 -Heteroaryl compounds such as vinylthiophene; vinylnaphthalene, vinylanthracene and the like can be mentioned, and these can be used singly or in combination of two or more.
- Conjugated diene monomers include 1,3-butadiene, isoprene, 2-ethyl-1,3-butadiene, 2-t-butyl-1,3-butadiene, 2-phenyl-1,3-butadiene, 2,3 -Dimethyl-1,3-butadiene, 1,3-pentadiene, 2-methyl-1,3-pentadiene, 3-methyl-1,3-pentadiene, 1,3-hexadiene, 2-methyl-1,3-octadiene 4,5-diethyl-1,3-octadiene, 3-butyl-1,3-octadiene, 1,3-cyclopentadiene, 1,3-cyclohexadiene, 1,3-cyclooctadiene, 1,3-tri Examples thereof include cyclodecadiene, myrcene, chloroprene and the like, and these can be used alone or in combination of two or more.
- the copolymer of the present invention may have other block chains in addition to the block chains (A) and (B).
- Examples of such other block chains include block chains containing repeating units derived from (meth) acrylic acid monomers, aromatic vinyl monomers, conjugated diene monomers, and the like.
- Examples of these block chains include homopolymerized block chains, random copolymerized block chains, and alternating copolymerized block chains. Examples of the (meth) acrylic acid monomer, aromatic vinyl monomer, conjugated diene monomer, and the like are exemplified.
- the ratio of the block chain (A) to the block chain (B) in the copolymer of the present invention is not particularly limited, but is 20 to 80:80 to 20, preferably 40 to 60:60 in terms of% by weight. ⁇ 40.
- the amine value of the copolymer is 80 mgKOH / g or more and 250 mgKOH / g or less, preferably 120 mgKOH / g or more and 250 mgKOH / g or less, more preferably 140 mgKOH / g or more and 200 mgKOH / g or less.
- the amine value can be measured with an automatic potentiometric titrator (AT-510, manufactured by Kyoto Electronics Industry Co., Ltd.).
- the weight average molecular weight measured using GPC is 1,000 to 200,000, and the dispersant is preferably 2,000 to 50,000, more preferably 5,000 to 30,000.
- the ratio of the weight average molecular weight to the number average molecular weight, measured using GPC, is 1.0 to 2.5, and the dispersant is particularly preferably 1.0 to 2.0.
- the production method of the block copolymer of the present invention is not particularly limited and can be produced by a known method.
- the monomer is polymerized by living polymerization to produce block copolymer Can be combined.
- living polymerization include living radical polymerization and living anion polymerization, and among these, living anion polymerization is more preferable.
- another block monomer may be continuously polymerized to form a block copolymer, Each block of A) and the block chain (B) may be reacted separately to produce a block, and then each block may be combined.
- Living anionic polymerization is preferable because the composition and molecular weight can be strictly controlled.
- a desired monomer can be dropped and polymerized in a solvent to which an additive and a polymerization initiator are added.
- the monomers of each block are sequentially added dropwise so as to have a desired sequence and reacted.
- the dropping of the monomer of the next block is started after completion of the polymerization reaction of the previous block. The progress of the polymerization reaction can be confirmed by detecting the remaining amount of the monomer by gas chromatography or liquid chromatography.
- the dropping of the monomer of the next block can be started after stirring for 1 minute to 1 hour.
- a plurality of types of monomers are included in each block, they may be dropped separately or simultaneously.
- the reaction can be carried out in the same manner as living anion polymerization, or after polymerizing a certain block of monomer and before polymerizing the next monomer, the polymer is once purified, It is also possible to polymerize the next monomer after removing the remainder of the monomer in the reaction. When it is preferable that the monomers of each block do not mix with each other, it is preferable to purify the polymer.
- the anionic polymerization initiator used for the polymerization of the monomer is not particularly limited as long as it is a nucleophile and has a function of initiating the polymerization of the anionic polymerizable monomer.
- alkali metal, organic Alkali metal compounds and the like can be used.
- alkali metal examples include lithium, sodium, potassium, cesium and the like.
- organic alkali metal compound examples include alkylated products, allylated products, arylated products, and lithium amide compounds of the above alkali metals. Specifically, ethyl lithium, n-butyl lithium, sec-butyl lithium, t-butyl lithium, ethyl sodium, lithium biphenyl, lithium naphthalene, lithium triphenyl, sodium naphthalene, potassium naphthalene, methyl 2-lithioisobutyrate, 2- Ethyl lithioisobutyrate, isopropyl 2-lithioisobutyrate, ⁇ -methylstyrene sodium dianion, 1,1-diphenylhexyllithium, 1,1-diphenyl-3-methylpentyllithium, 1,4-dilithio-2-butene, 1,6 -Dilithiohexane, poly
- the amount of the anionic polymerization initiator used is usually from 0.0001 to 0.2 equivalent, preferably from 0.0005 to 0.1 equivalent, based on the whole anionic polymerizable monomer to be used. By using an anionic polymerization initiator in this range, the target polymer can be produced with high yield.
- the polymerization temperature in the present invention is not particularly limited as long as it does not cause side reactions such as transfer reaction and termination reaction, and the monomer is consumed and the polymerization is completed, but it is carried out in the temperature range of ⁇ 100 ° C. or more and the solvent boiling point or less. It is preferred that
- the concentration of the monomer with respect to the polymerization solvent is not particularly limited, but is usually 1 to 40% by weight, and preferably 2 to 15% by weight.
- the polymerization solvent used in the production method of the present invention is not particularly limited as long as it does not participate in the polymerization reaction and is compatible with the polymer, and specifically includes diethyl ether, tetrahydrofuran (THF), dioxane.
- Polar compounds such as ether compounds such as trioxane, tertiary amines such as tetramethylethylenediamine and hexamethylphosphoric triamide, and non-aliphatic, aromatic or alicyclic hydrocarbon compounds such as hexane and toluene
- a polar solvent or a low polarity solvent can be illustrated. These solvents can be used alone or as a mixed solvent of two or more.
- polymerization can be accurately controlled even when a nonpolar solvent or a low polarity solvent is used in combination with a polar solvent.
- the nonpolar solvent or the low polarity solvent is based on the whole solvent. 5 vol% or more can be used, 20 vol% or more may be used, and 50 vol% or more may be used.
- a dialkyl zinc such as diethyl zinc, a dialkyl magnesium such as dibutyl magnesium, or an organic metal such as triethylaluminum can be used as a polymerization stabilizer, a monomer or a solvent purifier, if necessary.
- an additive such as an alkali metal salt or an alkaline earth metal salt can be added at the start of the polymerization or during the polymerization, if necessary.
- additives include mineral salts and halides such as sodium, potassium, barium and magnesium sulfates, nitrates and borates. More specifically, lithium And barium chloride, bromide, iodide, lithium borate, magnesium nitrate, sodium chloride, potassium chloride and the like.
- lithium halides such as lithium chloride, lithium bromide, lithium iodide, and lithium fluoride are preferable, and lithium chloride is particularly preferable.
- the copolymer of the present invention is used for the dispersion of various organic pigments in paints, printing inks, inkjet inks, pigment dispersions for color filters, metal oxides, metal waters, etc. It is useful for dispersing inorganic particles such as oxides, metal carbonates, metal sulfates, metal silicates, metal nitrides, and carbon nanotubes. In particular, it is very useful for pigment dispersion in pigment dispersions for color filters.
- THF tetrahydrofuran
- lithium chloride 2.6 wt% THF solution
- MMA methyl methacrylate
- THFMA tetrahydrofurfuryl methacrylate
- GC gas chromatography
- DMMA 2- (dimethylamino) ethyl methacrylate
- the obtained copolymer was analyzed by gel permeation chromatography (hereinafter abbreviated as GPC) (mobile phase DMF, PMMA standard).
- GPC gel permeation chromatography
- Mw molecular weight
- Mw / Mn molecular weight distribution
- the amine value was 130 mgKOH / g.
- nBMA n-butyl methacrylate
- PME-200 methoxypolyethylene glycol monomethacrylate
- EEMA 2-ethoxyethyl methacrylate
- the pigment dispersions prepared using the copolymer solutions obtained in Examples 1 to 3 and Comparative Example 1 showed a vivid green color, and after storage at 40 ° C. for 1 week, Unchanged viscosity value was shown.
- the pigment dispersion prepared using the copolymer solution obtained in Example 1 and Comparative Example 1 is the pigment prepared using the copolymer solution obtained in Example 2 and Example 3.
- the initial viscosity was about 30% higher and the thixotropic property was slightly worse.
- the pigment dispersion prepared using the copolymer obtained in Comparative Example 2 showed a bright green color, but was prepared using the copolymer solution obtained in Examples 2 and 3.
- the initial viscosity was about 100% higher and the thixotropy was poor.
- the viscosity value increased by 50% compared to immediately after preparation.
- the obtained pigment dispersion was diluted with a 40% by weight solution of polymethyl methacrylate, applied to a glass substrate, and then heated at 230 ° C. for 1 hour to obtain a green coating film.
- the obtained coating film was confirmed with an optical microscope, no foreign matter was observed on the coating film for the pigment dispersions prepared using the copolymers obtained in Examples 1 to 3 and Comparative Example 2. I could't.
- the pigment dispersion prepared using the copolymer obtained in Comparative Example 1 generation of foreign matters having a size of several ⁇ m to several tens of ⁇ m was observed on the coating film.
- the novel copolymer of the present invention has excellent pigment dispersion performance, and can further improve the heat resistance of the green pixel in the color filter.
Abstract
Description
本願は、2011年10月20日に出願された日本国特許出願第2011-230390号に対し優先権を主張し、その内容をここに援用する。
しかしながら、同文献においては、カラーフィルタにおいて、緑色画素の耐熱性等の点で不十分であった。
(1)3級アミノ基を有する繰り返し単位を含むブロック鎖(A)と、
下記式(I)
アミン価が80mgKOH/g以上250mgKOH/g以下であることを特徴とする共重合体、
(2)3級アミノ基を有する繰り返し単位が、下記式(II)
(3)重量平均分子量(Mw)と数平均分子量(Mn)の比(Mw/Mn)が1.01~2.00であることを特徴とする上記(1)又は(2)に記載の共重合体、及び、
(4)重量平均分子量(Mw)が2,000~50,000であることを特徴とする上記(1)~(3)のいずれかに記載の共重合体に関する。
本発明の共重合体は、以下のブロック鎖(A)及びブロック鎖(B)を、それぞれ少なくとも1個含有する。
ブロック鎖(A):3級アミノ基を有する繰り返し単位を含む。
ブロック鎖(B):式(I)で表される繰り返し単位を含む。
また、本発明の共重合体は、上記ブロック鎖(A)及びブロック鎖(B)以外に他のブロック鎖を含有していてもよい。
ブロック鎖(A)において、3級アミノ基を有する繰り返し単位とは、繰り返し単位の側鎖に上記3級アミノ基を有しているものであれば、特に制限されない。
具体的には、ブロック鎖(A)は、3級アミノ基を有する繰り返し単位の1種又は2種以上が重合したもの及びこれらと他の共重合しうるモノマー由来の繰り返し単位とが共重合したものを包含する。共重合は、ランダム、交互、ブロックなどを包含する。
上記3級アミノ基を有する繰り返し単位としては、3級アミノ基を有する限り特に制限はないが、例えば、下記一般式(II)で表される繰り返し単位が例示される。
C1~C10アルキレン基としては、メチレン鎖、エチレン鎖、プロピレン鎖、メチルエチレン鎖、ブチレン鎖、1,2-ジメチルエチレン鎖、ペンチレン鎖、1-メチルブチレン鎖、2-メチルブチレン鎖又はヘキシレン鎖等が例示される。
C6~C10アリールC1~C6アルキル基としては、ベンジル、フェネチル、3-フェニル-n-プロピル、1-フェニル-n-へキシル、ナフタレン-1-イルメチル、ナフタレン-2-イルエチル、1-ナフタレン-2-イル-n-プロピル、インデン-1-イルメチル等が例示される。
ブロック鎖(A)中の他の含有しうる繰り返し単位としては、(メタ)アクリル酸系モノマー、芳香族ビニル系モノマー、共役ジエン系モノマー等由来の繰り返し単位が例示される。
(メタ)アクリル酸系モノマーとしては、(メタ)アクリル酸;(メタ)アクリル酸メチル、(メタ)アクリル酸エチル、(メタ)アクリル酸n-プロピル、(メタ)アクリル酸i-プロピル、(メタ)アクリル酸n-ブチル、(メタ)アクリル酸i-ブチル、(メタ)アクリル酸s-ブチル、(メタ)アクリル酸t-ブチル、(メタ)アクリル酸ヘキシル、(メタ)アクリル酸グリシジル、(メタ)アクリル酸シクロヘキシル、(メタ)アクリル酸2-エチルへキシル、(メタ)アクリル酸1-エチルシクロヘキシル、(メタ)アクリル酸ベンジル等の(メタ)アクリル酸エステル化合物;2-メトキシエチル(メタ)アクリレート、メトキシポリエチレングリコール(エチレングリコールの単位数は2~100)(メタ)アクリレート、エトキシポリエチレングリコール(メタ)アクリレート、フェノキシポリエチレングリコール(メタ)アクリレート等を例示することができ、これらは1種単独で、あるいは2種以上混合して、用いることができる。
ブロック鎖(B)は、式(I)で表される繰り返し単位の1種又は2種以上が重合したもの及びこれらと他の共重合しうるモノマー由来の繰り返し単位とが共重合したものを包含する。共重合は、ランダム、交互、ブロックなどを包含する。
ブロック鎖(B)は、次式(I)で表される繰り返し単位の少なくとも1種を含有する。
本発明において、Qの含酸素飽和ヘテロ環基は、環上の任意の炭素原子に置換基を有していてもよい。含酸素飽和へテロ環基とは、酸素原子を少なくとも1個含み、更にN,S及びOから選ばれるヘテロ原子を1つ含んでいてもよい3~8員飽和ヘテロ環を意味し、好ましくは、3~6員飽和へテロ環である。
ここで、含酸素飽和へテロ環基としては、オキシラニル基、オキセタニル基、テトラヒドロフラニル基、テトラヒドロピラニル基、モルホルニル基及びチオモルホルニル基等を例示することができる。これらのうち、好ましくは、オキシラニル基、オキセタニル基、テトラヒドロフラニル基及びテトラヒドロピラニル基等の架橋性官能基である。
ブロック鎖(B)中の他の含有しうる繰り返し単位としては、(メタ)アクリル酸系モノマー、芳香族ビニル系モノマー、共役ジエン系モノマー等由来の繰り返し単位が例示される。
(メタ)アクリル酸系モノマーとしては、(メタ)アクリル酸;(メタ)アクリル酸メチル、(メタ)アクリル酸エチル、(メタ)アクリル酸n-プロピル、(メタ)アクリル酸i-プロピル、(メタ)アクリル酸n-ブチル、(メタ)アクリル酸i-ブチル、(メタ)アクリル酸s-ブチル、(メタ)アクリル酸t-ブチル、(メタ)アクリル酸ヘキシル、(メタ)アクリル酸グリシジル、(メタ)アクリル酸シクロヘキシル、(メタ)アクリル酸2-エチルへキシル、(メタ)アクリル酸1-エチルシクロヘキシル、(メタ)アクリル酸ベンジル等の(メタ)アクリル酸エステル化合物;2-メトキシエチル(メタ)アクリレート、メトキシポリエチレングリコール(エチレングリコールの単位数は2~100)(メタ)アクリレート、エトキシポリエチレングリコール(メタ)アクリレート、フェノキシポリエチレングリコール(メタ)アクリレート等を例示することができ、これらは1種単独で、あるいは2種以上混合して、用いることができる。
(共重合体中のブロック鎖(A)、ブロック鎖(B)以外の含有しうるブロック鎖)
本発明の共重合体は、ブロック鎖(A)及び(B)以外に、他のブロック鎖を有していてもよい。
そのような他のブロック鎖としては、(メタ)アクリル酸系モノマー、芳香族ビニル系モノマー、共役ジエン系モノマー等由来の繰り返し単位を含有するブロック鎖が挙げられる。これらのブロック鎖としては、単独重合したブロック鎖、ランダム共重合したブロック鎖、交互共重合したブロック鎖等が例示される。
(メタ)アクリル酸系モノマー、芳香族ビニル系モノマー、共役ジエン系モノマー等については、上記と同様のものが例示される。
本発明の共重合体中のブロック鎖(A)とブロック鎖(B)の比は、特に制限はないが、重量%比で、20~80対80~20、好ましくは、40~60対60~40である。また、共重合体のアミン価は、80mgKOH/g以上250mgKOH/g以下、好ましくは120mgKOH/g以上250mgKOH/g以下、さらに好ましくは140mgKOH/g以上200mgKOH/g以下である。
アミン価は、電位差自動滴定装置(京都電子工業株式会社製AT-510)により測定することができる。
また、GPCを用いて測定した、重量平均分子量は、1,000~200,000であり、分散剤としては2,000~50,000が好ましく、より好ましくは5,000~30,000である。GPCを用いて測定した、重量平均分子量と数平均分子量との比は、1.0~2.5であり、分散剤としては特に、1.0~2.0が好ましい。
本発明のブロック共重合体の製造方法は、特に制限されず、公知の方法により製造することができるが、たとえば、モノマーをリビング重合で重合させ、ブロック共重合体とすることができる。リビング重合としてはリビングラジカル重合、リビングアニオン重合が挙げられるが、このうちリビングアニオン重合がさらに好ましい。
ブロック共重合体とするには、ブロック鎖(A)又は(B)のモノマーを重合した後、連続的に別のブロックのモノマーを重合させてブロック共重合体化してもよいし、ブロック鎖(A)とブロック鎖(B)の各モノマーを別々に反応させてブロックを作製した後、各ブロックを結合してもよい。リビングアニオン重合は、厳密に組成や分子量をコントロールすることができる点から好ましい。
あるブロックのモノマーを重合し、次のブロックのモノマーを重合するには、先のブロックの重合反応の終了後、次のブロックのモノマーの滴下を開始する。重合反応の進行は、モノマーの残量をガスクロマトグラフィーや液体クロマトグラフフィーで検出することによって確認できる。また、先のブロックのモノマー滴下終了後、モノマーや溶媒の種類により異なるが、1分から1時間攪拌後、次のブロックのモノマーの滴下を開始することもできる。
各ブロックに複数種類のモノマーが含まれる場合には、それらを別々に滴下してもよいし、同時に滴下することもできる。
モノマーの重合に使用するアニオン重合開始剤としては、求核剤であって、アニオン重合性モノマーの重合を開始させる働きを有するものであれば特に制限されるものではなく、例えば、アルカリ金属、有機アルカリ金属化合物等を使用することができる。
本発明における重合温度は、移動反応や停止反応などの副反応が起こらず、モノマーが消費され重合が完結する温度範囲であれば特に制限されないが、-100℃以上溶媒沸点以下の温度範囲で行なわれることが好ましい。また、モノマーの重合溶媒に対する濃度は、特に制限されないが、通常、1~40重量%であり、2~15重量%であることが好ましい。
本発明においては、必要に応じて、ジエチル亜鉛等のジアルキル亜鉛、ジブチルマグネシウム等のジアルキルマグネシウム、トリエチルアルミニウム等の有機金属を、重合安定化剤、モノマーや溶媒の精製剤として使用することもできる。
本発明の共重合体は、塗料、印刷インク、インクジェットインク、カラーフィルタ用顔料分散物等における各種の有機顔料の分散を始め、金属酸化物、金属水酸化物、金属炭酸塩、金属硫酸塩、金属ケイ酸塩、金属窒化物等の無機粒子の分散やカーボンナノチューブの分散に有用である。特に、カラーフィルタ用顔料分散物における顔料分散にきわめて有用である。
以下実施例を用いて本発明を詳細に説明するが、本発明の技術的範囲はこれらの例示に限定されるものではない。
得られた前駆体ポリマーの30重量%濃度のPGMEA溶液に調整後、水130gを加え、100℃に加温し7時間反応させた。水分を留去し、40重量%濃度のPGMEA溶液に調整した。
得られた共重合体をGPC(移動相DMF、PMMAスタンダード)により分析し、分子量(Mw)が10640、分子量分布(Mw/Mn)が1.27、組成比がDMMA-[nBMA/PME200/THFMA/MA]=44-[25/17/8/6]重量%の共重合体であることを確認した(MAは、メタクリル酸を表す)。アミン価は149mgKOH/gであった。
1000mLフラスコにTHF524.3g、塩化リチウム(4.1重量%濃度THF溶液)49.6gを加え、-60℃まで冷却した。n-ブチルリチウム10.8g(15.4重量%濃度ヘキサン溶液)を加え、10分間撹拌後、ジイソプロピルアミン(2.3g)を加えて15分間撹拌し、次いでイソ酪酸メチル(2.4g)を加えさらに15分間撹拌した。MMA52.8g、PME-200(日油株式会社製)22.4gの混合液を滴下し、15分間反応を継続した。GCにより、モノマー消失を確認した後、DMMA36.9gを滴下し、滴下後30分反応継続した。GCにより、モノマー消失を確認した後、メタノール3.8gを加えて反応を停止した。得られた共重合体をGPC(移動相DMF、PMMAスタンダード)により分析し、分子量(Mw)が9300、分子量分布(Mw/Mn)が1.19、組成比がDMMA-[MMA/PME-200]=33-[47/20]重量%の共重合体であることを確認した。また、アミン価は113mgKOH/gであった。
1000mLフラスコにTHF472.2g、塩化リチウム(2.6重量%濃度THF溶液)90.2gを加え、-60℃まで冷却した。n-ブチルリチウム12.2g(15.4重量%濃度ヘキサン溶液)を加え、5分間撹拌後、ジフェニルエチレン(4.8g)を加えて15分間撹拌した。MMA47.8g、PME-200(日油株式会社製)24.7g、THFMA25.0gの混合液を滴下し、15分間反応を継続した。GCにより、モノマー消失を確認した後、DMMA27.3gを滴下し、滴下後30分反応継続した。GCにより、モノマー消失を確認した後、メタノール4.6gを加えて反応を停止した。得られた共重合体を40重量%濃度のPGMEA溶液に調整した。得られた共重合体をGPC(移動相DMF、PMMAスタンダード)により分析し、分子量(Mw)が11280、分子量分布(Mw/Mn)が1.16、組成比がDMMA-[MMA/PME-200/THFMA]=22-[38/20/20]重量%の共重合体であることを確認した。また、アミン価は74mgKOH/gであった。
上記実施例1~3及び比較例1~2で得られた共重合体溶液について、固形分濃度を40重量%濃度のPGMEA溶液に調整した後、これらを顔料分散剤として用いて、以下の顔料分散液を調製した。
顔料としてC.I.ピグメントグリーン58を12重量部及びC.I.ピグメントイエロー138を3重量部、顔料分散剤として上記実施例1~3及び比較例1~2で得られたいずれかの共重合体溶液を10重量部、溶媒としてPGMEA75重量部を用いて、ビーズミルにより12時間混合・分散して顔料分散液を調製した。その結果、実施例1~3及び比較例1で得られた共重合体溶液を用いて調製された顔料分散液は、鮮やかな緑色を示し、40℃で1週間保管した後も、調製直後と変わらぬ粘度値を示した。但し、実施例1及び比較例1で得られた共重合体溶液を用いて調製された顔料分散液は、実施例2及び実施例3で得られた共重合体溶液を用いて調製された顔料分散液に比べて、初期粘度が30%程度高く、チキソトロピー性も若干悪かった。一方、比較例2で得られた共重合体を用いて調製された顔料分散液は、鮮やかな緑色を示したが、実施例2及び実施例3で得られた共重合体溶液を用いて調製された顔料分散液に比べて、初期粘度が100%程度高く、チキソトロピー性も悪かった。比較例2で得られた共重合体を用いて調製された顔料分散液は、40℃で1週間保管した後、粘度値が調製直後対比で50%増加した。
また、得られた顔料分散液をポリメタクリル酸メチルの40重量%溶液にて希釈し、ガラス基板に塗布した後、230℃で1時間加熱し緑色の塗膜を得た。得られた塗膜を光学顕微鏡にて確認したところ、実施例1~3及び比較例2で得られた共重合体を用いて調製された顔料分散液については、塗膜上に異物は全く認められなかった。一方、比較例1で得られた共重合体を用いて調製された顔料分散液については、塗膜上に数μm~数十μmサイズの異物の発生が認められた。
Claims (4)
- 重量平均分子量(Mw)と数平均分子量(Mn)の比(Mw/Mn)が1.01~2.00であることを特徴とする請求項1又は2に記載の共重合体。
- 重量平均分子量(Mw)が2,000~50,000であることを特徴とする請求項1~3のいずれかに記載の共重合体。
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- 2012-10-15 WO PCT/JP2012/006596 patent/WO2013057918A1/ja active Application Filing
- 2012-10-15 CN CN201280050462.3A patent/CN103906777B/zh active Active
- 2012-10-15 IN IN2836CHN2014 patent/IN2014CN02836A/en unknown
- 2012-10-15 KR KR1020167033153A patent/KR101781316B1/ko active IP Right Grant
- 2012-10-15 EP EP12841303.6A patent/EP2769999A4/en not_active Withdrawn
- 2012-10-15 US US14/350,726 patent/US9562128B2/en active Active
- 2012-10-18 TW TW101138505A patent/TWI473825B/zh active
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WO2014109308A1 (ja) * | 2013-01-11 | 2014-07-17 | 日本曹達株式会社 | 無機粒子用分散剤、該分散剤を含有する組成物、硬化性組成物、硬化物および薄膜 |
JP6031125B2 (ja) * | 2013-01-11 | 2016-11-24 | 日本曹達株式会社 | 無機粒子用分散剤、該分散剤を含有する組成物、硬化性組成物、硬化物および薄膜 |
US9833405B2 (en) | 2014-03-19 | 2017-12-05 | Nano And Advanced Materials Institute Limited | Biodegradable microdepot delivery system for topical delivery |
Also Published As
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TW201326235A (zh) | 2013-07-01 |
KR20160140978A (ko) | 2016-12-07 |
EP2769999A1 (en) | 2014-08-27 |
KR20140061536A (ko) | 2014-05-21 |
TWI473825B (zh) | 2015-02-21 |
IN2014CN02836A (ja) | 2015-07-03 |
CN103906777B (zh) | 2016-09-14 |
US9562128B2 (en) | 2017-02-07 |
JP2013087232A (ja) | 2013-05-13 |
CN103906777A (zh) | 2014-07-02 |
US20140256884A1 (en) | 2014-09-11 |
KR101781316B1 (ko) | 2017-09-22 |
EP2769999A4 (en) | 2015-05-20 |
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