WO2020004001A1 - 水性樹脂組成物、コーティング剤、及び物品 - Google Patents
水性樹脂組成物、コーティング剤、及び物品 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/10—Block- or graft-copolymers containing polysiloxane sequences
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C08G81/024—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/04—Acids; Metal salts or ammonium salts thereof
- C08F220/06—Acrylic acid; Methacrylic acid; Metal salts or ammonium salts thereof
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- 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
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- 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
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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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
- C08F230/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal
- C08F230/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal
- C08F230/08—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon
- C08F230/085—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing phosphorus, selenium, tellurium or a metal containing a metal containing silicon the monomer being a polymerisable silane, e.g. (meth)acryloyloxy trialkoxy silanes or vinyl trialkoxysilanes
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- 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
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/12—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polysiloxanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/18—Polysiloxanes containing silicon bound to oxygen-containing groups to alkoxy or aryloxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/80—Siloxanes having aromatic substituents, e.g. phenyl side groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0016—Plasticisers
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/10—Block or graft copolymers containing polysiloxane sequences
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2150/00—Compositions for coatings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/442—Block-or graft-polymers containing polysiloxane sequences containing vinyl polymer sequences
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/54—Aqueous solutions or dispersions
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
Definitions
- the present invention relates to an aqueous resin composition, a coating agent, and an article having a cured coating film of the coating agent.
- the problem to be solved by the present invention is to form a coating film excellent in coating film appearance, substrate adhesion, water resistance, hot water resistance, solvent resistance, weather resistance, stain resistance, and substrate followability. It is to provide a suitable aqueous resin composition.
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, a specific composite resin is dissolved or dispersed, and an aqueous resin composition containing a plasticizer has a coating film appearance, substrate adhesion. It has been found that a coating film excellent in water resistance, hot water resistance, solvent resistance, weather resistance, stain resistance, bleed-out resistance, and substrate followability can be formed, and the present invention has been completed.
- the composite resin (ABC) in which the polysiloxane segment (C) derived from the condensate (c) of the alkyltrialkoxysilane (3) is bonded through a silicon-oxygen bond is dissolved or dispersed in an aqueous medium, and the plastic resin is further plasticized.
- the present invention relates to an aqueous resin composition characterized by the following.
- the aqueous resin composition of the present invention can form a coating film having excellent physical properties such as weather resistance and substrate followability.
- a coating film having excellent physical properties such as weather resistance and substrate followability.
- an exterior wall, a roof, a building member such as a membrane structure, a guard rail, a soundproof wall, and a drain ditch.
- Such as galvanized steel sheet, aluminum-zinc alloy steel sheet, etc. used for civil engineering materials such as civil engineering parts, home appliances, industrial machinery, and automobile parts, aluminum sheet, aluminum alloy sheet, electromagnetic steel sheet, copper sheet, stainless steel sheet, etc. It can be suitably used as a coating material for metal substrates, mobile phones, home appliances, OA equipment, plastic products such as automobile interior materials, cloths, and the like.
- the aqueous resin composition of the present invention comprises: a polysiloxane segment (B) of a composite resin (AB) in which a polymer segment (A) having a neutralized acid group and a polysiloxane segment (B) are chemically bonded; A composite resin (ABC) in which a polysiloxane segment (C) derived from a condensate (c) of an alkyltrialkoxysilane having 1 to 3 carbon atoms is bonded via a silicon-oxygen bond in an aqueous medium
- An aqueous resin composition which is dissolved or dispersed and further contains a plasticizer (D), and contains the total of the polysiloxane segment (B) and the polysiloxane segment (C) in the composite resin (ABC). The proportion is 15 to 85% by mass.
- the composite resin (ABC) comprises a polysiloxane segment (B) of a composite resin (AB) in which a polymer segment (A) having a neutralized acid group and a polysiloxane segment (B) are chemically bonded, and an alkyl group A polysiloxane segment (C) derived from a condensate (c) of an alkyltrialkoxysilane having 1 to 3 carbon atoms is bonded via a silicon-oxygen bond.
- Examples of the composite resin (ABC) include a composite resin having a graft structure in which a polysiloxane segment (B) is chemically bonded to a side chain of a polymer segment (A) having a neutralized acid group; A polysiloxane segment (B) of a composite resin having a block structure in which a polysiloxane segment (B) is chemically bonded to the terminal of the polymer segment (A); and an alkyl trialkoxy having 1 to 3 carbon atoms in the alkyl group.
- a composite resin having a structure in which a polysiloxane segment (C) derived from a condensate (c) of silane is chemically bonded via a silicon-oxygen bond is exemplified.
- Examples of the chemical bond between the polymer segment (A) and the polysiloxane segment (B) included in the composite resin (ABC) include a bonding mode represented by the following general formula (3) or (4). Among them, it is preferable to use a composite resin having the bonding mode of the general formula (3) because a coating film having excellent weather resistance can be formed.
- the polymer segment (A) must be a polymer segment having a neutralized acid group in order to disperse or dissolve the composite resin (ABC) in an aqueous medium.
- (B) and the raw material for synthesis thereof easily hydrolyze and condense with a hydroxyl group bonded to a silicon atom or a hydrolyzable group bonded to a silicon atom and chemically bond in the bonding mode of the general formula (3).
- a polymer having a hydroxyl group bonded to a silicon atom and / or a hydrolyzable group bonded to a silicon atom hereinafter abbreviated as “a hydroxyl group and / or a hydrolyzable group bonded to a silicon atom”) together with the group (a ′).
- the polymer (a ′) and the polymer (a) may be polymers having an acid group or a neutralized acid group other than polysiloxane, and examples thereof include an acrylic polymer and a fluoropolymer.
- Examples of the acid group in the polymer (a ′) include a carboxyl group, a phosphoric acid group, an acidic phosphoric acid ester group, a phosphorous acid group, a sulfonic acid group, a sulfinic acid group, and among others, a composite resin (ABC) Carboxyl groups are preferred because they can be easily introduced into the skeleton.
- Examples of the basic compound used for neutralizing such an acid group include organic amine compounds such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, 2-aminoethanol, and 2-dimethylaminoethanol.
- organic amine compounds such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, 2-aminoethanol, and 2-dimethylaminoethanol.
- Inorganic basic compounds such as ammonia, sodium hydroxide and potassium hydroxide; quaternary ammonium hydroxides such as tetramethylammonium hydroxide, tetra-n-butylammonium hydroxide and trimethylbenzylammonium hydroxide; Among them, it is preferable to use an organic amine compound and ammonia (aqueous ammonia).
- the amount of the neutralized acid groups in the polymer (a) is determined in view of maintaining good storage stability of an aqueous dispersion or an aqueous solution obtained by dispersing or dissolving the composite resin (ABC) in an aqueous medium. Therefore, the amount is preferably 0.1 to 20 parts by mass, more preferably 0.2 to 10 parts by mass, based on 100 parts by mass of the composite resin (ABC).
- the hydrolyzable group bonded to a silicon atom in the polymer (a ′) is a functional group capable of generating a hydroxyl group (silanol group) bonded to a silicon atom by being hydrolyzed.
- halogen atoms bonded to silicon atoms alkoxy groups bonded to silicon atoms, acyloxy groups bonded to silicon atoms, phenoxy groups bonded to silicon atoms, mercapto groups bonded to silicon atoms, bonded to silicon atoms
- Examples include an amino group, an amide group bonded to a silicon atom, an aminooxy group bonded to a silicon atom, an iminooxy group bonded to a silicon atom, and an alkenyloxy group bonded to a silicon atom.
- An alkoxy group bonded to a silicon atom is preferable because it is possible to easily remove by-products after the reaction.
- the polymer segment (A) has a functional group other than a neutralized acid group, a hydroxyl group bonded to a silicon atom and a hydrolyzable group bonded to a silicon atom, as long as the effects of the present invention are not impaired. It may be.
- examples of such other functional groups include a carboxyl group that is not neutralized, a blocked carboxyl group, a carboxylic acid anhydride group, a hydroxyl group, a blocked hydroxyl group, a cyclocarbonate group, an epoxy group, a carbonyl group, and a primary amide group.
- a secondary amide group a carbamate group, a polyethylene glycol group, a polypropylene glycol group, and a group represented by the following general formula (5).
- polysiloxane segment (B) constituting the composite resin (ABC) for example, a segment derived from a polysiloxane having a hydroxyl group and / or a hydrolyzable group having a silicon atom bond is exemplified.
- hydrolyzable group bonded to the silicon atom include those similar to the hydrolyzable group bonded to the silicon atom described in the polymer segment (A), and preferred examples are also the same.
- polysiloxane segment (B) those having a structure represented by the following general formula (1) or (2) are preferable. Since the polysiloxane segment having a structure represented by the following general formula (1) or (2) has a three-dimensional network-like polysiloxane structure, the resulting coating film has excellent solvent resistance, weather resistance, and the like. It is a thing.
- R 1 is an organic group having 4 to 12 carbon atoms bonded to a silicon atom, and R 2 and R 3 are each independently methyl bonded to a silicon atom.
- R 1 is preferably a hydrocarbon group having 4 to 12 carbon atoms bonded to a silicon atom, R 1 is a phenyl group or an alkyl group having 4 carbon atoms.
- Each of R 2 and R 3 is preferably a methyl group bonded to a silicon atom or an ethyl group bonded to a silicon atom, and both are a methyl group bonded to a silicon atom. Is more preferable.
- an organoalkoxysilane preferably an organic group having 4 to 12 carbon atoms bonded to a silicon atom (hereinafter referred to as “silicon atom bond”)
- organic group having 4 to 12 carbon atoms Abbreviated as “organic group having 4 to 12 carbon atoms”
- sicon group Abbreviated as “atom-bonded methyl group and / or ethyl group”.
- These polysiloxane segments are composed of a silicon atom-bonded organic group having 4 to 12 carbon atoms, a silicon atom-bonded hydroxyl group and / or a hydrolyzable group, and / or a silicon atom-bonded methyl group and / or an ethyl group. It has a hydroxyl group and / or a hydrolyzable group having a silicon atom bond and a silicon atom bond, and may have any of linear, branched, and cyclic structures.
- Examples of the organic group having 4 to 12 carbon atoms bonded to a silicon atom include an alkyl group, a cycloalkyl group, an aryl group, and an aralkyl group each having 4 to 12 carbon atoms bonded to a silicon atom. Can be Note that these organic groups may have a substituent.
- an organic group having 4 to 12 carbon atoms bonded to a silicon atom a hydrocarbon group bonded to a silicon atom is preferable.
- a hydrocarbon group bonded to a silicon atom is preferable.
- a phenyl group bonded to a silicon atom or an alkyl group having 4 carbon atoms bonded to a silicon atom is more preferable.
- the polysiloxane segment (C) constituting the composite resin (ABC) is a segment derived from a condensate (c) of an alkyl trialkoxysilane having 1 to 3 carbon atoms in the alkyl group.
- the condensate (c) of an alkyltrialkoxysilane having 1 to 3 carbon atoms in the group has a hydroxyl group bonded to a silicon atom and / or an alkoxy group bonded to a silicon atom.
- the condensate (c) of the alkyl trialkoxysilane preferably has a structure represented by the following general formula (6). Since the polysiloxane segment derived from the condensate of the alkyltrialkoxysilane having the structure represented by the following general formula (6) has a three-dimensional network polysiloxane structure, the resulting coating film has solvent resistance, It is excellent in weather resistance and the like.
- R 4 in the general formula (6) is an alkyl group having 1 to 3 carbon atoms.
- the polysiloxane segment is added to 100 parts by mass of the composite resin (ABC).
- the total amount (B + C) of (B) and the polysiloxane segment (C) derived from the condensate (c) of alkyl trialkoxysilane is preferably from 15 to 85 parts by mass, more preferably from 25 to 65 parts by mass. Is more preferred.
- the composite resin (ABC) since the base material following property is further improved while maintaining durability such as weather resistance and stain resistance, 100 parts by mass of the composite resin (ABC) is used.
- the amount of the polysiloxane segment (C) derived from the alkyltrialkoxysilane condensate (c) is preferably from 10 to 60 parts by mass, more preferably from 20 to 50 parts by mass.
- the above-mentioned composite resin (ABC) can be produced by various methods, and among them, it is preferable to produce the composite resin (ABC) by a process comprising the following production steps (I) and (II).
- a polymer (a ′) having both an acid group and a hydroxyl group and / or a hydrolyzable group bonded to a silicon atom, an organoalkoxysilane (b) and / or a hydrolyzed condensate thereof (b- 1) is hydrolyzed and condensed to form a composite resin (C) in which a polymer segment (A ′) derived from the polymer (a ′) and a polysiloxane segment (B) derived from the organoalkoxysilane (b) are chemically bonded.
- a composite resin (C) in which a polymer segment (A ′) derived from the polymer (a ′) and a polysiloxane segment (B) derived from the organoalkoxysilane (b) are chemically bonded.
- the condensate (c) of the obtained composite resin (A′B) and an alkyl trialkoxysilane having 1 to 3 carbon atoms in the alkyl group is hydrolyzed and condensed to obtain a composite resin (A 'B) the polysiloxane segment (B) and the polysiloxane segment (C) derived from the condensate (c) of an alkyl trialkoxysilane having 1 to 3 carbon atoms in the alkyl group via a silicon-oxygen bond
- the acid group in the composite resin (A′B) is neutralized with a basic compound to obtain a composite resin (AB)
- a condensate (c) of an alkyl trialkoxysilane having 1 to 3 carbon atoms in the alkyl group Is hydrolyzed and con
- the hydrolysis-condensation reaction in the above-mentioned production step can be advanced by various methods. However, a method in which water and a catalyst are supplied during the production step to advance the reaction is simple and preferable.
- hydrolytic condensation reaction refers to a condensation reaction in which a part of the hydrolyzable group is hydrolyzed under the influence of water or the like to form a hydroxyl group, and then proceeds between the hydroxyl group and the hydrolyzable group.
- the polymer (a ′) is a polymer having both an acid group and a hydroxyl group and / or a hydrolyzable group having a silicon atom bond, except that the acid group is not neutralized. It is exactly the same as the polymer (a) having both a hydroxyl group and / or a hydrolyzable group having a silicon atom bond with a group.
- the vinyl polymer may be, for example, an acid group-containing vinyl monomer and a hydroxyl group-containing vinyl monomer bonded to a silicon atom and / or a silicon atom. It can be produced by polymerizing a hydrolyzable group-containing vinyl monomer bonded to a polymer and, if necessary, other vinyl monomers.
- the acid group-containing vinyl monomer examples include various vinyl monomers containing an acid group such as a carboxyl group, a phosphate group, an acid phosphate group, a phosphite group, a sulfonic acid group, and a sulfinic acid group. Of these, a vinyl monomer containing a carboxyl group (which may be a carboxylic anhydride group) is preferred.
- carboxyl group-containing vinyl monomer examples include unsaturated carboxylic acids such as (meth) acrylic acid, 2-carboxyethyl (meth) acrylate, crotonic acid, itaconic acid, maleic acid, and fumaric acid; Anhydrides of unsaturated polycarboxylic acids such as itaconic anhydride; anhydrides of unsaturated monocarboxylic acids such as acrylic anhydride and methacrylic anhydride; unsaturated carboxylic acids such as acrylic acid and methacrylic acid; and acetic acid and propionic acid; Mixed acid anhydrides with saturated carboxylic acids such as benzoic acid; monomethyl itaconate, mono-n-butyl itaconate, monomethyl maleate, mono-n-butyl maleate, monomethyl fumarate, mono-n-butyl fumarate and the like Monoesters (half esters) of a saturated dicarboxylic acid and a saturated monohydric alcohol; adipic acid Monovinyl esters
- the carboxyl group may be blocked.
- the vinyl monomer having the blocked carboxyl group include trimethylsilyl (meth) acrylate, dimethyl-tert-butylsilyl (meth) acrylate, and trimethylsilylcroto.
- hydroxyl-containing vinyl monomer bonded to the silicon atom examples include trihydroxyvinylsilane, ethoxydihydroxyvinylsilane, diethoxyhydroxyvinylsilane, dichlorohydroxyvinylsilane, 3- (meth) acryloyloxypropyltrihydroxysilane, and -(Meth) acryloyloxypropylmethyldihydroxysilane and the like.
- a vinyl monomer having a hydrolyzable group represented by the following general formula (7) can be used.
- R 5 in the general formula (7) is a monovalent organic group such as an alkyl group, an aryl group, and an aralkyl group
- R 6 is a halogen atom, an alkoxy group, an acyloxy group, a phenoxy group, an aryloxy group, a mercapto group.
- Examples of the vinyl monomer having a hydrolyzable group represented by the general formula (7) include vinyltrimethoxysilane, vinyltriethoxysilane, vinylmethyldimethoxysilane, vinyltri (2-methoxyethoxy) silane, and vinyltriacetoxy. Silane, vinyltrichlorosilane, 2-trimethoxysilylethyl vinyl ether, 3- (meth) acryloyloxypropyltrimethoxysilane, 3- (meth) acryloyloxypropyltriethoxysilane, 3- (meth) acryloyloxypropylmethyldimethoxysilane, 3- (meth) acryloyloxypropyltrichlorosilane and the like.
- vinyl trimethoxysilane since hydrolysis reaction can easily proceed and by-products after the reaction can be easily removed, 3- Meth) acryloyloxy propyl trimethoxy silane is preferred.
- Examples of the other vinyl monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, n-butyl (meth) a, 2-ethylhexyl (meth) acrylate, Alkyl (meth) acrylate having an alkyl group having 1 to 22 carbon atoms, such as lauryl (meth) acrylate; aralkyl (meth) acrylate such as benzyl (meth) acrylate and 2-phenylethyl (meth) acrylate; cyclohexyl (meth) Cycloalkyl (meth) acrylates such as acrylate and isobornyl (meth) acrylate; ⁇ -alkoxyalkyl (meth) acrylates such as 2-methoxyethyl (meth) acrylate and 4-methoxybutyl (meth) acrylate; styrene, p
- Hydroxyalkyl (meth) acrylates such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate and 4-hydroxybutyl (meth) acrylate; containing hydroxyl groups such as 2-hydroxyethyl vinyl ether and 4-hydroxybutyl vinyl ether Vinyl ethers; hydroxyl-containing allyl ethers such as 2-hydroxyethyl allyl ether and 2-hydroxybutyl allyl ether; addition products of a vinyl monomer having a hydroxyl group bonded to a carbon atom with a lactone such as ⁇ -caprolactone;
- the types and amounts of the other vinyl monomers can be appropriately selected in accordance with the properties imparted to the aqueous resin composition of the present invention within a range that does not impair the effects of the present invention.
- the polymer (a ′) is selected from the group consisting of an anionic group, a cationic group and a nonionic group for the purpose of improving the solubility or dispersibility of the composite resin (ABC) in an aqueous medium. Those having at least one kind of hydrophilic group can be used.
- Examples of the vinyl polymer usable as the polymer (a ′) include an acid group-containing vinyl monomer, a hydroxyl group-containing vinyl monomer bonded to a silicon atom and / or a hydrolyzable compound bonded to a silicon atom. It can be produced by polymerizing a group-containing vinyl monomer and, if necessary, other vinyl monomers by a polymerization method such as a bulk radical polymerization method, a solution radical polymerization method, or a non-aqueous dispersion radical polymerization method. Among them, it is preferable to apply a so-called solution radical polymerization method for producing a vinyl polymer by subjecting the vinyl monomer to radical polymerization in an organic solvent, since it is easy to produce.
- a so-called solution radical polymerization method for producing a vinyl polymer by subjecting the vinyl monomer to radical polymerization in an organic solvent, since it is easy to produce.
- a polymerization initiator When polymerizing the vinyl monomer by the radical polymerization method, a polymerization initiator can be used as necessary.
- Such polymerization initiators include, for example, 2,2'-azobis (isobutyronitrile), 2,2'-azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (2-methylbutyronitrile) Azo compounds such as nitrile); tert-butyl peroxypivalate, tert-butyl peroxybenzoate, tert-butyl peroxy-2-ethylhexanoate, di-tert-butyl peroxide, cumene hydroperoxide, diisopropyl per And peroxides such as oxycarbonate.
- organic solvent examples include aliphatic or alicyclic hydrocarbons such as n-hexane, n-heptane, n-octane, cyclohexane, and cyclopentane; aromatic hydrocarbons such as toluene, xylene, and ethylbenzene; Alcohols such as methanol, ethanol, n-butanol, ethylene glycol monomethyl ether and propylene glycol monomethyl ether; esters such as ethyl acetate, n-butyl acetate, n-amyl acetate, ethylene glycol monomethyl ether acetate and propylene glycol monomethyl ether acetate Ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, methyl n-amyl ketone and cyclohexanone; polyketones such as diethylene glycol dimethyl ether and diethylene glycol dibutan
- Alkylene glycol dialkyl ethers such as 1,2-dimethoxyethane, tetrahydrofuran and dioxane; N-methylpyrrolidone, dimethylformamide, dimethylacetamide, ethylene carbonate and the like, each of which may be used alone or in combination of two or more. can do.
- the polymer (a ′) preferably has a number average molecular weight in the range of 500 to 200,000, more preferably 700 to 100,000, and more preferably 1,000 to 50,000. Is particularly preferable.
- a number average molecular weight within such a range, it is possible to prevent thickening and gelation during production of the composite resin (ABC), and to provide a coating film excellent in durability. Can be formed.
- organoalkoxysilane (b) and / or its hydrolytic condensate (b-1) used for forming the polysiloxane segment (B) in the production step (I) will be described.
- the organoalkoxysilane (b) is not particularly limited, but among these, a composite resin (ABC) having excellent dispersion stability can be produced, and a coating film having excellent durability can be formed. And a monoorganotrialkoxysilane having an organic group having 4 to 12 carbon atoms and a diorganodialkoxysilane having two methyl groups and / or ethyl groups are both preferable.
- the hydrolyzed condensate (b-1) of the organoalkoxysilane (b) is not particularly limited as long as it is obtained by hydrolyzing and condensing the organoalkoxysilane (b).
- Preferred are monoorganotrialkoxysilanes having 4 to 12 organic groups and / or those obtained by hydrolytic condensation of diorganodialkoxysilanes having two silicon-bonded methyl and / or ethyl groups. .
- Examples of the monoorganotrialkoxysilane having an organic group having 4 to 12 carbon atoms with a silicon atom bond include, for example, iso-butyltrimethoxysilane, cyclohexyltrimethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 3- (Meth) acryloyloxypropyltrimethoxysilane, 3- (meth) acryloyloxypropyltriethoxysilane and the like can be mentioned.
- diorganodialkoxysilane having two silicon-bonded methyl and / or ethyl groups examples include dimethyldimethoxysilane, dimethyldiethoxysilane, dimethyldi-n-butoxysilane, dimethyldiacetoxysilane, and diethyldimethoxysilane. Examples include silane and diethyldiacetoxysilane.
- organoalkoxysilanes (b) iso-butyltrimethoxysilane, phenyltrimethoxysilane, and dimethyldimethoxysilane are preferred because the hydrolysis reaction can easily proceed and by-products after the reaction can be easily removed. preferable.
- organoalkoxysilanes (b) may be used alone or in combination of two or more.
- the hydrolysis-condensation product (b-1) of the organoalkoxysilane (b) can be used alone. It is preferable to use the organoalkoxysilane (b) alone, or to use the organoalkoxysilane (b) and its hydrolysis condensate (b-1) in combination because the production is easy.
- the organoalkoxysilane (b) is used alone. Is particularly preferred.
- the single use of the organoalkoxysilane (b) means that only the organoalkoxysilane (b) is used, and the case where two or more kinds of the organoalkoxysilane (b) are used in combination is also included.
- the hydrolysis-condensation reaction in the production step (I) can be caused to proceed by various methods.
- the catalyst examples include: inorganic acids such as hydrochloric acid, sulfuric acid, and phosphoric acid; organic acids such as p-toluenesulfonic acid, monoisopropyl phosphate, and acetic acid; inorganic bases such as sodium hydroxide and potassium hydroxide; tetraisopropyl titanate; Titanate such as titanate; 1,8-diazabicyclo [5.4.0] undecene-7 (DBU), 1,5-diazabicyclo [4.3.0] nonene-5 (DBN), 1,4-diazabicyclo [2.2.2] Compounds containing a basic nitrogen atom such as octane (DABCO), tri-n-butylamine, dimethylbenzylamine, monoethanolamine, imidazole, 1-methylimidazole; tetramethylammonium salt, tetrabutyl Quaternary ammonium such as ammonium salt and dilauryl dimethyl ammonium salt A quatern
- the catalyst is preferably used in an amount of 0.0001 to 10 parts by mass, based on 100 parts by mass of the organoalkoxysilane (b) and / or its hydrolytic condensate (b-1), and 0.0005 to 0.0005 parts by mass. It is more preferably used in the range of from 3 to 3 parts by mass, particularly preferably in the range of from 0.001 to 1 part by mass.
- water used when the hydrolysis-condensation reaction proceeds is based on 1 mol of the hydrolyzable group and the hydroxyl group of the organoalkoxysilane (b) and / or the hydrolyzed condensate (b-1).
- 0.05 mol or more is appropriate, preferably 0.1 mol or more, and particularly preferably 0.5 to 3.0 mol.
- the catalyst and water may be supplied collectively or sequentially, or a mixture of the catalyst and water in advance may be supplied.
- the reaction temperature of the hydrolysis-condensation reaction is suitably in the range of 0 to 150 ° C, and preferably in the range of 20 to 100 ° C.
- the reaction can be performed under any conditions of normal pressure, increased pressure or reduced pressure.
- alkyltrialkoxysilane having 1 to 3 carbon atoms in the alkyl group examples include methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, iso- Methyl trimethoxy silane and ethyl trimethoxy silane are preferred, because propyl trimethoxy silane and the like can be mentioned. Among them, hydrolysis reaction can easily proceed and by-products after the reaction can be easily removed. These alkyl trialkoxysilanes may be used alone or in combination of two or more.
- the method for obtaining the condensate (c) from the alkyl trialkoxysilane is not particularly limited, and includes various methods.
- a simple method is to supply water and a catalyst to advance the hydrolysis / condensation reaction. Is preferred.
- Examples of the other silane compound include a tetrafunctional alkoxysilane compound such as tetramethoxysilane, tetraethoxysilane or tetra-n-propoxysilane; and a hydrolytic condensate of the tetrafunctional alkoxysilane compound. These can be used together as long as the effects of the present invention are not impaired.
- the tetrafunctional alkoxysilane compound (B) and the polysiloxane segment (C) are used in an amount of 100 mol% based on 100 mol% of the total silicon atoms. It is preferable to use the silane compound and the hydrolytic condensate together in an amount not exceeding 20 mol% of silicon atoms.
- plasticizer (D) examples include phthalate esters such as dibutyl phthalate, diheptyl phthalate, di (2-ethylhexyl) phthalate, and butylbenzyl phthalate; and aliphatic esters such as butyl oleate and methyl acetyl risilinolate.
- Aliphatic dibasic acid esters such as dioctyl adipate, dibutyl sebacate and isodecyl succinate; trimellitic acid esters such as 2-ethylhexyl trimellitate and tridecyl trimellitate; pentaerythritol esters; diethylene glycol diethylene glycol Ether esters such as benzoate, dibutyl carbitol adipate, dibutoxyethoxyethyl adipate, triethylene glycol diacetate, and polyethylene glycol di-2-ethylhexanoate; Benzoic acid esters such as dimethyl glycol dibenzoate, dipropylene glycol dibenzoate, triethylene glycol dibenzoate, and polyethylene glycol dibenzoate; phosphate esters such as tricresyl phosphate and tributyl phosphate; chlorinated paraffin, alkyl diphenyl, and carbonized Hydrogen-based oil, process oil,
- plasticizers (D) may be used alone or in combination of two or more.
- the molecular weight of the plasticizer (D) is preferably in the range of 200 to 2,000, and more preferably in the range of 300 to 1500, since the compatibility with the resin is further improved.
- the plasticizer (D) further improves the substrate followability and the water resistance while maintaining excellent weather resistance and stain resistance
- the plasticizer (D) is added in an amount of 0.1 to 100 parts by mass of the composite resin (ABC).
- the range is preferably 1 to 60 parts by mass, more preferably 0.5 to 45 parts by mass, and still more preferably 1 to 35 parts by mass.
- Examples of the aqueous medium used in the present invention include water, an organic solvent miscible with water, and a mixture thereof.
- water-miscible organic solvents include alcohols such as methanol, ethanol, n- and isopropanol; ketones such as acetone and methyl ethyl ketone; polyalkylene glycols such as ethylene glycol, diethylene glycol and propylene glycol; alkyl ethers of polyalkylene glycol; Lactams such as N-methyl-2-pyrrolidone;
- water alone or a mixture of water and an organic solvent miscible with water is preferred, and water alone is particularly preferred.
- the aqueous resin composition of the present invention is one in which the composite resin (ABC) is dispersed or dissolved in an aqueous medium and further contains a plasticizer (D).
- a plasticizer D
- the composite resin (ABC) and the aqueous medium And dispersing or dissolving the composite resin (ABC) in an aqueous medium, and then mixing the plasticizer (D).
- the method include a method of mixing with a medium, and a method of mixing a plasticizer (D) in a system in advance and mixing them with an aqueous medium when producing a composite resin (ABC).
- the aqueous resin composition of the present invention has a viscosity of 20 to 20 from the viewpoint of suppressing a sharp increase in viscosity during production, and improving the productivity of the aqueous resin composition, the ease of application thereof, the drying property, and the like. It preferably has a non-volatile content of 70% by mass, more preferably 30 to 60% by mass.
- the aqueous resin composition of the present invention can contain a thermosetting resin as needed.
- thermosetting resins include vinyl resins, polyester resins, polyurethane resins, epoxy resins, epoxy ester resins, acrylic resins, phenol resins, petroleum resins, ketone resins, silicone resins, and modified resins thereof.
- various inorganic particles such as clay minerals, metals, metal oxides, and glass can be used as needed.
- the type of metal include gold, silver, copper, platinum, titanium, zinc, nickel, aluminum, iron, silicon, germanium, antimony, and metal oxides thereof.
- the aqueous resin composition of the present invention may contain a photocatalytic compound or an inorganic pigment, an organic pigment, an extender, a wax, a surfactant, a stabilizer, a flow regulator, a dye, a leveling agent, a rheology control agent, and an ultraviolet ray, if necessary.
- a photocatalytic compound or an inorganic pigment an organic pigment, an extender, a wax, a surfactant, a stabilizer, a flow regulator, a dye, a leveling agent, a rheology control agent, and an ultraviolet ray, if necessary.
- Various additives such as an absorbent and an antioxidant can be used.
- a coating film having more excellent durability can be obtained.
- the curing agent (E) a compound having a functional group that reacts with a hydrophilic group or a silanol group of the composite resin (ABC) or the like can be used.
- the curing agent (E) include compounds having a silanol group and / or a hydrolyzable silyl group, polyepoxy compounds, polyoxazoline compounds, polycarbodiimide compounds, and polyisocyanate compounds.
- a resin having a carboxyl group or a carboxylate group is used as the composite resin, a compound having an epoxy group and a silanol group and / or a hydrolyzable silyl group, a polyepoxy compound, a polyoxazoline compound, a polycarbodiimide compound Is preferably used.
- Examples of the compound having a silanol group and / or a hydrolyzable silyl group include those similar to the silane compounds exemplified as usable in the production of the composite resin, and 3-glycidoxypropyltriyl.
- polyepoxy compound examples include polyglycidyl ether having a structure derived from an aliphatic or alicyclic polyol such as ethylene glycol, hexanediol, neopentyl glycol, trimethylolpropane, pentaerythritol, sorbitol, hydrogenated bisphenol A; Polyglycidyl ethers of aromatic diols such as bisphenol A, bisphenol S and bisphenol F; polyglycidyl ethers of polyether polyols such as polyethylene glycol, polypropylene glycol and polytetramethylene glycol; tris (2-hydroxyethyl) isocyanurate Polyglycidyl ether; polyglycidyl of aliphatic or aromatic polycarboxylic acid such as adipic acid, butanetetracarboxylic acid, phthalic acid, terephthalic acid Esters; Bisepoxides of hydrocarbon dienes such as cyclooo
- polyoxazoline compound examples include 2,2′-p-phenylene-bis (1,3-oxazoline), 2,2′-tetramethylene-bis (1,3-oxazoline), and 2,2′-octaline.
- Methylene-bis (2-oxazoline), 2-isopropenyl-1,3-oxazoline, or a polymer thereof can be used.
- polyisocyanate compound examples include aromatic diisocyanates such as tolylene diisocyanate and diphenylmethane-4,4′-diisocyanate; meta-xylylene diisocyanate, ⁇ , ⁇ , ⁇ ′, ⁇ ′-tetramethyl-meta-xylylene diisocyanate
- Aralkyl diisocyanates such as isocyanates; hexamethylene diisocyanate, lysine diisocyanate, 1,3-bisisocyanatomethylcyclohexane, 2-methyl-1,3-diisocyanatocyclohexane, 2-methyl-1,5-diisocyanatocyclohexane, isophorone Diisocyanates and the like can be used.
- polyisocyanate compound various prepolymers having an isocyanate group, a prepolymer having an isocyanurate ring, a polyisocyanate having a biuret structure, and a vinyl monomer having an isocyanate group can also be used.
- the isocyanate group of the polyisocyanate compound as a curing agent may be blocked by a conventionally known blocking agent such as methanol, if necessary.
- the curing agent (E) is preferably used, for example, in a range of 0.1 to 50 parts by mass, and preferably in a range of 0.5 to 30 parts by mass, based on 100 parts by mass of the composite resin (ABC). Is more preferably used in the range of 1 to 20 parts by mass.
- the curing agent (E) is an epoxy contained in the curing agent with respect to one equivalent of the carboxyl group in the composite resin (A).
- the equivalent of a reactive functional group such as a group, a cyclocarbonate group, a hydroxyl group, an oxazoline group, a carbodiimide group, a hydrazino group is preferably in the range of 0.2 to 5.0 equivalents, and 0.5 to 3.0. It is more preferably in the range of equivalents, and particularly preferably in the range of 0.7 to 2.0 equivalents.
- the aqueous resin composition of the present invention can contain a curing catalyst, if necessary.
- curing catalyst examples include lithium hydroxide, sodium hydroxide, potassium hydroxide, sodium methylate, tetraisopropyl titanate, tetra-n-butyl titanate, tin octylate, lead octylate, cobalt octylate, and zinc octylate.
- the aqueous resin composition of the present invention can form a coating film having excellent substrate followability, it can be used for various applications such as a coating agent and an adhesive.
- the aqueous resin composition of the present invention is preferably used as a coating agent since it can form a coating film having excellent stain resistance, durability and weather resistance as well as the above-mentioned substrate following property, and is preferably used as a coating agent. It is more preferable to use it as a coating agent or a coating agent for forming a primer layer.
- Examples of the substrate capable of forming a coating film by applying the coating agent include an inorganic substrate, a plastic substrate, a metal substrate, cloth, paper, and a wood substrate.
- the inorganic base material examples include, for example, a cement base material, a silicate base material such as calcium silicate, a gypsum base material or a base material containing an inorganic material represented by a ceramic base material as a main component.
- a cement base material a silicate base material such as calcium silicate
- a gypsum base material a base material containing an inorganic material represented by a ceramic base material as a main component.
- ALC light-weight cellular concrete
- asbestos cement glass fiber
- glass fiber examples include reinforced calcium silicate, calcined clay such as gypsum board and tile, and glass.
- the plastic substrate for example, a substrate composed of a polyolefin such as polyethylene, polypropylene, ethylene-propylene copolymer; a substrate composed of a polyester such as polyethylene isophthalate, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate; nylon 1, a substrate made of polyamide such as nylon 11, nylon 6, nylon 66, nylon MX-D; polystyrene, styrene-butadiene block copolymer, styrene-acrylonitrile copolymer, styrene-butadiene-acrylonitrile copolymer (ABS A substrate made of a styrene polymer such as resin); a substrate made of an acrylic polymer such as polymethyl methacrylate or a methyl methacrylate / ethyl acrylate copolymer; Substrate, and the like consisting of over preparative.
- the plastic substrate may have a single
- the plastic substrate may have an antistatic agent, an antifogging agent, an antiblocking agent, an antioxidant, a light stabilizer, a crystal nucleating agent, a lubricant, etc., as long as the effects of the present invention are not impaired. May be included.
- the plastic substrate may be subjected to various surface treatments on the substrate surface in order to further improve the adhesion with the coating agent of the present invention.
- surface treatments include corona discharge treatment, A plasma treatment, a flame plasma treatment, an electron beam irradiation treatment, an ultraviolet irradiation treatment, and the like can be given, and a treatment combining one or more of these treatments may be performed.
- the shape of the substrate is not particularly limited, and may be, for example, a sheet, plate, sphere, film, large-sized structure, or an assembly or molded product having a complicated shape.
- the surface of the substrate may be previously coated with an undercoat or the like, and the coating agent of the present invention can be applied even if the coated portion has deteriorated.
- undercoat paint examples include various water-soluble paints, water dispersion paints, organic solvent paints, organic solvent dispersion paints, and powder paints. Specifically, acrylic resin paint, polyester resin paint, alkyd resin paint, epoxy resin paint, fatty acid modified epoxy resin paint, silicone resin paint, polyurethane resin paint, fluoroolefin paint, amine modified epoxy resin Various types such as resin paints can be used.
- the undercoat paint may be a clear paint containing no pigment, or may be an enamel paint containing the pigment, or a metallic paint containing aluminum flake or the like.
- Examples of the method for applying the coating agent of the present invention to the substrate include, for example, brush coating, roller coating, spray coating, dip coating, flow coater coating, roll coater coating, and electrodeposition coating. It is possible to apply various coating methods such as a coating method.
- the coating agent of the present invention After applying the coating agent of the present invention to the substrate surface by the coating method, the coating agent is allowed to stand at room temperature for about 1 to 10 days, or is heated at a temperature range of 40 to 250 ° C. for about 10 seconds to 2 hours, A coated article having a coating film excellent in durability, crack resistance, weather resistance, stain resistance and the like can be obtained.
- Articles having a coating film formed using the coating agent of the present invention by the above method include, for example, housings of home electric appliances such as televisions, refrigerators, washing machines, and air conditioners; personal computers, smartphones, and mobile phones. Housings for electronic devices such as digital cameras and game machines; housings for OA equipment such as printers and facsimile machines; and various plastic members such as various parts used for interior materials of various vehicles such as automobiles and railway vehicles. In addition, interior and exterior materials of buildings such as outer walls, roofs, membrane structures, glass, decorative panels, etc .; civil engineering members such as soundproof walls and drains; galvanized steel sheets used for home appliances, industrial machines, automobile parts, etc.
- metal members such as an aluminum-zinc alloy steel plate, a plated steel plate, an aluminum plate, an aluminum alloy plate, an electromagnetic steel plate, a copper plate, and a stainless steel plate. Furthermore, since the coating agent of the present invention can form a coating film having excellent substrate followability, various functional films constituting a polarizing plate of a liquid crystal display may be used.
- the condensate obtained by the above-mentioned hydrolysis-condensation reaction is subjected to a reduced pressure of 40 to 1.3 kPa (under reduced pressure conditions at the start of methanol distillation at 40 kPa and finally reduced to 1.3 kPa).
- a reduced pressure 40 to 1.3 kPa (under reduced pressure conditions at the start of methanol distillation at 40 kPa and finally reduced to 1.3 kPa).
- the condensate (c-1) of MTMS having a number average molecular weight of 1,000 was removed by distillation under conditions of a temperature of 40 to 60 ° C. to remove methanol and water generated in the reaction process.
- 1,000 parts by mass of a liquid active ingredient: 70% by mass
- active ingredient refers to a value obtained by dividing the theoretical yield (parts by mass) when all methoxy groups of a silane monomer such as MTMS have undergone a condensation reaction by the actual yield (parts by mass) after the condensation reaction [methoxy silane of silane monomer]. The theoretical yield (parts by mass) when all the groups undergo the condensation reaction / the actual yield (parts by mass) after the condensation reaction].
- MMA methyl methacrylate
- CHMA cyclohexyl methacrylate
- BA butyl acrylate
- TPEH tert-butylperoxy-2-ethylhexanoate
- a composite resin (A'B-1) comprising a polymer segment having a hydrolyzable group and a polysiloxane segment derived from PTMS and DMDMS was obtained.
- 14 parts by mass of triethylamine (hereinafter abbreviated as “TEA”) was added to neutralize the carboxyl groups in the composite resin (A′B-1) to form a composite resin (AB-1).
- TEA triethylamine
- c-1 of methyltrimethoxysilane a condensate of methyltrimethoxysilane are added, and 550 parts by mass of deionized water are further added to form a mixture of the composite resin (AB-1) by hydrolysis and condensation with methyltrimethoxysilane.
- An aqueous dispersion of (ABC-1) was obtained.
- the obtained aqueous dispersion was distilled under reduced pressure of 40 to 1.3 kPa at a temperature of 40 to 60 ° C. for 2 hours to remove IPA, generated methanol and water, and to obtain a nonvolatile content of 40%.
- 1,000 parts by mass of an aqueous dispersion of 0.0% of the composite resin (ABC-1) was obtained.
- Synthesis example 3 Production of aqueous dispersion of composite resin (ABC-2)
- a reaction vessel similar to that of Synthesis Example 1 36 parts by mass of PnP, 80 parts by mass of IPA, 32 parts by mass of PTMS, and 19 parts by mass of DDMMS were charged and heated to 80 ° C.
- a mixture containing 99 parts by mass of MMA, 86 parts by mass of butyl methacrylate (hereinafter abbreviated as “BMA”), 67 parts by mass of BA, 16 parts by mass of AA, 5 parts by mass of MPTS, 14 parts by mass of PnP and 14 parts by mass of TBPEH was prepared.
- a mixture of 0.9 parts by mass of the catalyst (1) and 24 parts by mass of deionized water was added dropwise over 5 minutes, and the mixture was further stirred at the same temperature for 10 hours for hydrolysis and condensation.
- a composite resin (A ′) comprising a polymer segment having both a carboxyl group and a hydrolyzable group bonded to a silicon atom and a polysiloxane segment derived from PTMS and DMDMS. -2) was obtained.
- Synthesis example 4 Production of aqueous dispersion of composite resin (ABC-3)
- the same reaction vessel as in Synthesis Example 1 was charged with 60 parts by mass of PnP, 50 parts by mass of IPA, 54 parts by mass of PTMS, and 32 parts by mass of DDMMS, and heated to 80 ° C.
- 40 parts by mass of MMA, 84 parts by mass of BMA, 51 parts by mass of 2-ethylhexyl methacrylate (hereinafter abbreviated as "EHMA"), 19 parts by mass of AA, 6 parts by mass of MPTS, 10 parts by mass of PnP and 10 parts by mass of TBPEH are contained.
- the mixture was dropped into the reaction vessel in 4 hours, and after completion of the dropping, the mixture was further reacted at the same temperature for 2 hours to have a number average molecular weight of 17,000 having both a carboxyl group and a hydrolyzable group bonded to a silicon atom.
- a mixture of 0.9 parts by mass of the catalyst (1) and 24 parts by mass of deionized water was added dropwise over 5 minutes, and the mixture was further stirred at the same temperature for 10 hours to add water.
- a polymer segment having both a carboxyl group and a hydrolyzable group bonded to a silicon atom and a polysiloxane segment derived from PTMS and DMDMS are subjected to a decomposition condensation reaction.
- a composite resin (A'B-3) was obtained.
- the formation of the composite resin (ABC-3) to which (C-1) was bonded and the dispersion of the composite resin (ABC-3) in an aqueous medium were performed to obtain an aqueous dispersion of the composite resin (ABC-3).
- aqueous dispersion was distilled under reduced pressure of 40 to 1.3 kPa at a temperature of 40 to 60 ° C. for 2 hours to remove IPA, generated methanol and water, and to obtain a nonvolatile content of 40%.
- IPA generated methanol and water
- Synthesis Example 5 Production of aqueous dispersion of composite resin (ABC-4)
- a reaction vessel similar to that of Synthesis Example 1 126 parts by mass of PnP, 59 parts by mass of PTMS, and 62 parts by mass of DDMMS were charged and heated to 80 ° C. Then, at the same temperature, a mixture containing 21 parts by mass of MMA, 20 parts by mass of BMA, 14 parts by mass of BA, 13 parts by mass of AA, 2 parts by mass of MPTS, 3.5 parts by mass of PnP and 3.5 parts by mass of TBPEH was put into the reaction vessel in 4 hours.
- a′-4 having a carboxyl group and a hydrolyzable group bonded to a silicon atom and having a number average molecular weight of 10,100.
- a mixture of 0.016 parts by mass of the catalyst (1) and 45 parts by mass of deionized water was added dropwise over 5 minutes, and the mixture was further stirred at the same temperature for 1 hour to carry out a hydrolytic condensation reaction.
- a composite resin (A'B-4) comprising a polymer segment having combined hydrolyzable groups and a polysiloxane segment derived from PTMS and DMDMS was obtained.
- Synthesis Example 6 Production of aqueous dispersion of composite resin (ABC-5)
- the same reaction vessel as in Synthesis Example 1 was charged with 50 parts by mass of PnP, 80 parts by mass of IPA, 24 parts by mass of PTMS, and 14 parts by mass of DDMMS, and the temperature was raised to 80 ° C. Then, at the same temperature, a mixture containing 70 parts by mass of MMA, 141 parts by mass of BMA, 113 parts by mass of BA, 11 parts by mass of AA, 18 parts by mass of MPTS, 18 parts by mass of IPA and 18 parts by mass of TBPEH was dropped into the reaction vessel in 4 hours.
- a polymer (a'-5) having a carboxyl group and a hydrolyzable group bonded to a silicon atom and having a number average molecular weight of 20,000 and a catalyst ( 1)
- a mixture of 0.4 parts by mass and 11 parts by mass of deionized water was added dropwise over 5 minutes, and the mixture was further stirred at the same temperature for 10 hours to carry out a hydrolytic condensation reaction.
- a composite resin (A'B-5) comprising a polymer segment having a decomposable group and a polysiloxane segment derived from PTMS and DMDMS was obtained.
- the obtained dispersion was distilled under reduced pressure of 40 to 1.3 kPa at a temperature of 40 to 60 ° C. for 2 hours to remove IPA, formed methanol and water, and to obtain a nonvolatile matter of 40.
- 1,000 parts by mass of an aqueous dispersion of a 0% composite resin (ABC-7) was obtained.
- Synthesis Example 7 Production of aqueous dispersion of composite resin (ABC-6)
- a reaction vessel similar to that of Synthesis Example 1 149 parts by mass of PnP, 154 parts by mass of PTMS, and 94 parts by mass of DDMMS were charged, and the temperature was raised to 80 ° C.
- a mixture containing 7 parts by mass of MMA, 13 parts by mass of BMA, 7 parts by mass of BA, 7 parts by mass of AA, 1 part by mass of MPTS, 1 part by mass of PnP and 1.4 parts by mass of TBPEH was dropped into the reaction vessel at the same temperature in 4 hours.
- a polymer (a'-6) having a carboxyl group and a hydrolyzable group bonded to a silicon atom and having a number average molecular weight of 9,900
- a mixture of 0.03 parts by mass of the catalyst (1) and 70 parts by mass of deionized water was added dropwise over 5 minutes, and the mixture was further stirred at the same temperature for 1 hour to carry out a hydrolytic condensation reaction, whereby the carboxyl group was bonded to the silicon atom.
- a composite resin (A'B-6) comprising a polymer segment having a hydrolyzable group and a polysiloxane segment derived from PTMS and DMDMS was obtained.
- reaction solution containing the composite resin (A'BC-6) in which the polysiloxane segment (C-1) derived from the condensate (c-1) of the composite resin (A'B-6) and methyltrimethoxysilane is bound Obtained.
- the resulting reaction solution was distilled under reduced pressure of 40 to 1.3 kPa at a temperature of 40 to 60 ° C. for 2 hours to remove generated methanol and water, and then 8 parts by mass of TEA was added.
- the carboxyl groups in the composite resin (A'BC-6) are neutralized into the composite resin (ABC-6), and then dispersed in an aqueous medium by adding 500 parts by mass of deionized water to obtain a nonvolatile resin.
- 1,000 parts by mass of an aqueous dispersion of a composite resin (ABC-6) having a content of 35.0% was obtained.
- Example 1 Production and evaluation of aqueous resin composition (1)
- 100 parts by mass of the aqueous dispersion of the composite resin (ABC-1) obtained in Synthesis Example 2, a plasticizer (D-1) (“ADEKASIZER RS-1000” manufactured by ADEKA Corporation, a polyetherester plasticizer) 5 Parts by mass and 4 parts by mass of 3-glycidoxypropyltrimethoxysilane (hereinafter abbreviated as “GPTMS”) were uniformly mixed to obtain an aqueous resin composition (1).
- Examples 2 to 4 Production and evaluation of aqueous resin compositions (2) to (4)
- the aqueous resin compositions (2) to (2) were prepared in the same manner as in Example 1 except that the composite resin (ABC-1) used in Example 1 was changed to composite resins (ABC-2) to (ABC-4). 4) was obtained.
- Example 5 Production and evaluation of aqueous resin composition (5)
- Example 6 Production and evaluation of aqueous resin composition (6)
- a plasticizer (D-3) "Monosizer PB-3A" manufactured by DIC Corporation, a benzoate-based plasticizer
- Example 7 Production and evaluation of aqueous resin composition (7)
- An aqueous resin was prepared in the same manner as in Example 5 except that the plasticizer (2) used in Example 5 was changed to a plasticizer (D-4) (“Monosizer DOA”, manufactured by DIC Corporation, dioctyl adipate). Composition (7) was obtained.
- Example 8 Production and evaluation of aqueous resin composition (8)
- An aqueous resin was prepared in the same manner as in Example 5, except that the plasticizer (2) used in Example 5 was changed to a plasticizer (D-5) (“Monosizer DBP” manufactured by DIC Corporation, dibutyl phthalate). Composition (8) was obtained.
- Example 9 Production and evaluation of aqueous resin composition (9)
- Example 1 was the same as Example 1 except that the plasticizer (2) used in Example 5 was changed to a plasticizer (D-6) (“ADEKASIZER C-8” manufactured by ADEKA Corporation, a trimellitic ester plasticizer). Similarly, an aqueous resin composition (9) was obtained.
- Example 10 Production and evaluation of aqueous resin composition (10)
- the same reaction vessel as in Synthesis Example 1 was charged with 36 parts by mass of PnP, 80 parts by mass of IPA, 32 parts by mass of PTMS, 19 parts by mass of DDMMS, and 5 parts by mass of plasticizer (D-1), and the temperature was raised to 80 ° C.
- a mixture containing 99 parts by mass of MMA, 86 parts by mass of BMA, 67 parts by mass of BA, 16 parts by mass of AA, 5 parts by mass of MPTS, 14 parts by mass of PnP and 14 parts by mass of TBPEH was dropped into the reaction vessel at the same temperature in 4 hours, and the mixture was dropped.
- a polymer (a'-10) having a carboxyl group containing a plasticizer and a hydrolyzable group bonded to a silicon atom and having a number average molecular weight of 18,000. Got.
- a mixture of 0.9 parts by mass of the catalyst (1) and 24 parts by mass of deionized water was added dropwise over 5 minutes, and the mixture was further stirred at the same temperature for 10 hours to carry out a hydrolytic condensation reaction.
- a composite resin (A'B-10) comprising a polymer segment having a hydrolyzable group combined with a polysiloxane segment derived from PTMS and DMDMS was obtained.
- the resulting reaction solution was distilled under reduced pressure of 40 to 1.3 kPa at a temperature of 40 to 60 ° C. for 2 hours to remove generated methanol, IPA and water, and the nonvolatile content was reduced to 40.0%.
- 1,000 parts by weight of an aqueous resin composition (10 ′) was obtained.
- 100 parts by mass of the aqueous resin composition (10 ′) and 7 parts by mass of GPTMS were uniformly mixed to obtain an aqueous resin composition (10).
- Example 11 Production and evaluation of aqueous resin composition (11)
- 493 parts of the composite resin (A'B-2) obtained in Synthesis Example 3 and 5 parts by mass of a plasticizer (D-1) were added to the same reaction vessel as in Synthesis Example 1, and mixed and stirred.
- 124 parts by mass of the condensate (c-1) of methoxysilane are charged to carry out a hydrolytic condensation reaction, and the condensate (c-1) of the composite resin (A'B-11) and methyltrimethoxysilane is derived.
- a reaction liquid containing a composite resin having a polysiloxane segment bonded thereto and a plasticizer was obtained.
- Example 12 Production and evaluation of aqueous resin composition (12) Except that the composite resin (ABC-1) used in Example 1 was changed to the composite resin (ABC-2) and 5 parts by mass of the plasticizer (1) was changed to 1 part by mass of the plasticizer (D-3), An aqueous resin composition (12) was obtained in the same manner as in Example 1.
- Example 13 Production and evaluation of aqueous resin composition (13) Except that the composite resin (ABC-1) used in Example 1 was changed to the composite resin (ABC-2), and 5 parts by mass of the plasticizer (1) was changed to 10 parts by mass of the plasticizer (D-3). An aqueous resin composition (13) was obtained in the same manner as in Example 1.
- Example 14 Production and evaluation of aqueous resin composition (14) Except that the composite resin (ABC-1) used in Example 1 was changed to the composite resin (ABC-2) and 5 parts by mass of the plasticizer (D-1) was changed to 30 parts by mass of the plasticizer (3). An aqueous resin composition (14) was obtained in the same manner as in Example 1.
- Example 15 Production and evaluation of aqueous resin composition (15) Except that the composite resin (ABC-1) used in Example 1 was changed to the composite resin (ABC-2) and 5 parts by mass of the plasticizer (D-1) was changed to 50 parts by mass of the plasticizer (3).
- An aqueous resin composition (15) was obtained in the same manner as in Example 1.
- Example 16 Production and evaluation of aqueous resin composition (16) 66.6 parts by mass of pigment dispersion (1), 100 parts by mass of aqueous dispersion of composite resin (ABC-2) obtained in Synthesis Example 2, 5 parts by mass of plasticizer (D-2), and 5.3 parts by mass of GPTMS Parts were uniformly mixed to obtain an aqueous resin composition (16).
- Example 17 Production and evaluation of aqueous resin composition (17) 66.6 parts by mass of the pigment dispersion (1), 100 parts by mass of the aqueous dispersion of the composite resin (ABC-2) obtained in Synthesis Example 2, 20 parts by mass of the plasticizer (D-2), and 5.3 parts by mass of GPTMS Parts were uniformly mixed to obtain an aqueous resin composition (17).
- aqueous resin composition (R1) Production and evaluation of aqueous resin composition (R1)
- the aqueous resin was prepared in the same manner as in Example 1 except that the composite resin (ABC-1) used in Example 1 was changed to the composite resin (ABC-2) and the plasticizer (D-1) was not used.
- a composition (R1) was obtained.
- aqueous resin composition (R2) (Comparative Example 2: Production and evaluation of aqueous resin composition (R2))
- the composite resin (ABC-1) used in Example 1 was changed to a composite resin (ABC-2), and diethylene glycol monobutyl ether (hereinafter, abbreviated as "BDG") was used instead of 5 parts by mass of the plasticizer (D-1). )
- BDG diethylene glycol monobutyl ether
- An aqueous resin composition (R2) was obtained in the same manner as in Example 1 except that 10 parts by mass was used.
- aqueous resin composition (R3) was obtained in the same manner as in Example 16, except that 10 parts by mass of BDG was used instead of 5 parts by mass of the plasticizer (D-2) used in Example 16.
- aqueous resin composition (R4) was obtained in the same manner as in Example 14, except that the composite resin (ABC-2) used in Example 14 was changed to the composite resin (ABC-5).
- Example 5 Production and evaluation of aqueous resin composition (R5)
- an aqueous resin composition (R5) was obtained.
- the elongation of the test coating film was measured using "Autograph AGS-1kNG (distance between chucks: 20 mm, pulling speed: 300 mm / min, measurement atmosphere: 22 ° C., 60% RH)" manufactured by Shimadzu Corporation.
- the evaluation was performed based on the elongation percentage of the coating film before the tensile test. It is practically preferable that the elongation is 20% or more.
- Tables 1 to 4 show the evaluation results of Examples 1 to 4 described above.
- Table 5 shows the evaluation results of Comparative Examples 1 to 5 described above.
- Comparative Examples 1 to 3 are examples containing no plasticizer (D), but it was confirmed that the obtained cured coating film had insufficient water resistance and substrate followability.
- Comparative Example 4 is an example in which the polysiloxane segment in the composite resin is less than the lower limit of 15% by mass of the present invention, but the cured coating film obtained has insufficient water resistance, weather resistance, and stain resistance. Was confirmed.
- Comparative Example 5 is an example in which the polysiloxane segment in the composite resin is more than the upper limit of 85% by mass of the present invention, but the water resistance, weather resistance and substrate followability of the obtained cured coating film are insufficient. It was confirmed that.
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Abstract
Description
示される構造を有することが好ましい。下記一般式(6)で示される構造を有するア
ルキルトリアルコキシシランの縮合物に由来のポリシロキサンセグメントは、三次元網目状のポリシロキサン構造を有することから、得られる塗膜は、耐溶剤性、耐候性などに優れたものである。
攪拌機、温度計、滴下ロート、冷却管及び窒素ガス導入口を備えた反応容器に、メチルトリメトキシシラン(以下、「MTMS」と略記する。)1,421質量部を仕込んで、60℃まで昇温した。次いで、前記反応容器中にiso-プロピルアシッドホスフェート(堺化学株式会社製「A-3」、以下「触媒(1)」と略記する。)0.17質量部と脱イオン水207質量部との混合物を5分間で滴下した後、80℃の温度で4時間撹拌して加水分解縮合反応させた。
攪拌機、温度計、滴下ロート、冷却管及び窒素ガス導入口を備えた反応容器に、プロピレングリコールモノプロピルエーテル(以下、「PnP」と略記する。)50質量部、イソプロピルアルコール(以下、「IPA」と略記する。)80質量部、フェニルトリメトキシシラン(以下、「PTMS」と略記する。)26質量部及びジメチルジメトキシシラン(以下、「DMDMS」と略記する。)15質量部を仕込んで、80℃まで昇温した。
次いで、同温度で、メチルメタクリレート(以下、「MMA」と略記する。)96質量部、シクロヘキシルメタクリレート(以下、「CHMA」と略記する。)99質量部、ブチルアクリレート(以下、「BA」と略記する。)96質量部、アクリル酸(以下、「AA」と略記する。)13質量部、3-メタクリルオキシプロピルトリメトキシシラン(以下、「MPTS」と略記する。)16質量部、IPA 16質量部及びtert-ブチルパーオキシ-2-エチルヘキサノエート(以下、「TBPEH」と略記する。)16質量部を含有する混合物を、前記反応容器中へ4時間で滴下した後、更に同温度で2時間反応させることによって、カルボキシル基と加水分解性基とを有する数平均分子量が19,000のアクリル重合体(a’-1)の有機溶剤溶液を得た。
次いで、触媒(1)0.4質量部と脱イオン水11質量部との混合物を5分間で滴下し、更に同温度で10時間撹拌して加水分解縮合反応させることで、カルボキシル基と珪素原子に結合した加水分解性基を併有する重合体セグメントとPTMS及びDMDMS由来のポリシロキサンセグメントからなる複合樹脂(A’B-1)を得た。
次いで、トリエチルアミン(以下、「TEA」と略記する。)14質量部を添加して複合樹脂(A’B-1)中のカルボキシル基を中和して複合樹脂(AB-1)とした後、メチルトリメトキシシランの縮合物(c-1)81質量部を添加し、更に、脱イオン水550質量部を添加して、加水分解縮合による前記複合樹脂(AB-1)とメチルトリメトキシシランの縮合物(c-1)由来のポリシロキサンセグメント(C-1)が結合した複合樹脂(ABC-1)の生成と、複合樹脂(ABC-1)の水性媒体中への分散を行ない、複合樹脂(ABC-1)の水性分散体を得た。
次いで、得られた水性分散体を、40~1.3kPaの減圧下、温度40~60℃の条件で2時間蒸留することにより、IPA、生成したメタノール及び水を除去して、不揮発分が40.0%の複合樹脂(ABC-1)の水性分散体1,000質量部を得た。
合成例1と同様の反応容器に、PnP36質量部、IPA80質量部、PTMS32質量部及びDMDMS19質量部を仕込んで、80℃まで昇温した。次いで、同温度でMMA99質量部、ブチルメタクリレート(以下、「BMA」と略記する。)86質量部、BA67質量部、AA16質量部、MPTS5質量部、PnP14質量部及びTBPEH14質量部を含有する混合物を、前記反応容器中へ4時間で滴下し、滴下終了後、更に同温度で2時間反応させてカルボキシル基と珪素原子に結合した加水分解性基を併有する数平均分子量が18,000の重合体(a’-2)を得た後、触媒(1)0.9質量部と脱イオン水24質量部との混合物を、5分間で滴下し、更に同温度で10時間撹拌して加水分解縮合反応を行ない、カルボキシル基と珪素原子に結合した加水分解性基を併有する重合体セグメントとPTMS及びDMDMS由来のポリシロキサンセグメントからなる複合樹脂(A’B-2)を得た。次いで、TEA18質量部を添加して複合樹脂(A’B-2)中のカルボキシル基を中和して複合樹脂(AB-2)とした後、メチルトリメトキシシランの縮合物(c-1)124質量部を添加し、更に、脱イオン水550質量部を添加して、加水分解縮合による前記複合樹脂(AB-2)とメチルトリメトキシシランの縮合物(c-1)由来のポリシロキサンセグメント(C-1)が結合した複合樹脂(ABC-2)の生成と、複合樹脂(ABC-2)の水性媒体中への分散を行ない、複合樹脂(ABC-2)の水性分散体を得た。次いで、得られた水性分散体を、40~1.3kPaの減圧下、温度40~60℃の条件で2時間蒸留することにより、IPA、生成したメタノール及び水を除去して、不揮発分が40.0%の複合樹脂(ABC-2)の水性分散体1,000質量部を得た。
合成例1と同様の反応容器に、PnP60質量部、IPA50質量部、PTMS54質量部及びDMDMS32質量部を仕込んで、80℃まで昇温した。次いで、同温度でMMA40質量部、BMA84質量部、2-エチルヘキシルメタクリレート(以下、「EHMA」と略記する。)51質量部、AA19質量部、MPTS6質量部、PnP10質量部及びTBPEH10質量部を含有する混合物を、前記反応容器中へ4時間で滴下し、滴下終了後、更に同温度で2時間反応させてカルボキシル基と珪素原子に結合した加水分解性基を併有する数平均分子量が17,000の重合体(a’-3)を得た後、触媒(1)0.9質量部と脱イオン水24質量部との混合物を、5分間で滴下し、更に同温度で10時間攪拌して加水分解縮合反応を行ない、カルボキシル基と珪素原子に結合した加水分解性基を併有する重合体セグメントとPTMS及びDMDMS由来のポリシロキサンセグメントからなる複合樹脂(A’B-3)を得た。次いで、TEA21質量部を添加して複合樹脂(A’B-3)中のカルボキシル基を中和して複合樹脂(AB-3)とした後、メチルトリメトキシシランの縮合物(c-1)207質量部を添加し、更に、脱イオン水570質量部を添加して、加水分解縮合による前記複合樹脂(AB-3)とメチルトリメトキシシランの縮合物(c-1)由来のポリシロキサンセグメント(C-1)が結合した複合樹脂(ABC-3)の生成と、複合樹脂(ABC-3)の水性媒体中への分散を行ない、複合樹脂(ABC-3)の水性分散体を得た。次いで、得られた水性分散体を、40~1.3kPaの減圧下、温度40~60℃の条件で2時間蒸留することにより、IPA、生成したメタノール及び水を除去して、不揮発分が40.0%の複合樹脂(ABC-3)の水性分散体1,000質量部を得た。
合成例1と同様の反応容器に、PnP126質量部、PTMS59質量部及びDMDMS62質量部を仕込んで、80℃まで昇温した。次いで、同温度でMMA21質量部、BMA20質量部、BA14質量部、AA13質量部、MPTS2質量部、PnP3.5質量部及びTBPEH3.5質量部を含有する混合物を、前記反応容器中へ4時間で滴下し、滴下終了後、更に同温度で2時間反応させてカルボキシル基と珪素原子に結合した加水分解性基を併有する数平均分子量が10,100の重合体(a’-4)を得た後、触媒(1)0.016質量部と脱イオン水45質量部との混合物を5分間で滴下し、更に同温度で1時間撹拌して加水分解縮合反応を行ない、カルボキシル基と珪素原子に結合した加水分解性基を併有する重合体セグメントとPTMS及びDMDMS由来のポリシロキサンセグメントからなる複合樹脂(A’B-4)を得た。次いで、メチルトリメトキシシランの縮合物(c-1)290質量部を添加し、更に、脱イオン水59質量部を添加して同温度で16時間撹拌し、加水分解縮合反応を行なって、前記複合樹脂(A’B-4)とメチルトリメトキシシランの縮合物(c-1)由来のポリシロキサンセグメント(C-1)が結合した複合樹脂(A’BC-4)を含有する反応液を得た。次いで、得られた反応液を、40~1.3kPaの減圧下、温度40~60℃の条件で2時間蒸留することにより、生成したメタノール及び水を除去した後、TEA15質量部を添加して複合樹脂(A’BC-4)中のカルボキシル基を中和して複合樹脂(ABC-4)とし、次いで、脱イオン水497質量部を添加することにより水性媒体中への分散を行ない、不揮発分が35.0%の複合樹脂(ABC-4)の水性分散体1,000質量部を得た。
合成例1と同様の反応容器に、PnP50質量部、IPA80質量部、PTMS24質量部及びDMDMS14質量部を仕込んで、80℃まで昇温した。次いで、同温度でMMA70質量部、BMA141質量部、BA113質量部、AA11質量部、MPTS18質量部、IPA18質量部及びTBPEH18質量部を含有する混合物を、前記反応容器中へ4時間で滴下し、滴下終了後、更に同温度で2時間反応させてカルボキシル基と珪素原子に結合した加水分解性基を併有する数平均分子量が20,000の重合体(a′-5)を得た後、触媒(1)0.4質量部と脱イオン水11質量部との混合物を、5分間で滴下し、更に同温度で10時間撹拌して加水分解縮合反応を行ない、カルボキシル基と珪素原子に結合した加水分解性基を併有する重合体セグメントとPTMS及びDMDMS由来のポリシロキサンセグメントからなる複合樹脂(A′B-5)を得た。次いで、TEA12質量部を添加して複合樹脂(A′B-5)中のカルボキシル基を中和して複合樹脂(AB-5)とした後、メチルトリメトキシシランの縮合物(c-1)34質量部を添加し、更に、脱イオン水550質量部を添加して、加水分解縮合による前記複合樹脂(AB-7)とメチルトリメトキシシランの縮合物(c-1)由来のポリシロキサンセグメント(C-1)が結合した複合樹脂(ABC-5)の生成と、複合樹脂(ABC-5)の水性媒体中への分散を行ない、複合樹脂(ABC-5)の分散体を得た。次いで、得られた分散体を、40~1.3kPaの減圧下、温度40~60℃の条件で2時間蒸留することにより、IPA、生成したメタノール及び水を除去して、不揮発分が40.0%の複合樹脂(ABC-7)の水性分散体1,000質量部を得た。
合成例1と同様の反応容器に、PnP149質量部、PTMS154質量部及びDMDMS94質量部を仕込んで、80℃まで昇温した。次いで、同温度でMMA7質量部、BMA13質量部、BA7質量部、AA7質量部、MPTS1質量部、PnP1質量部及びTBPEH1.4質量部を含有する混合物を、前記反応容器中へ4時間で滴下し、滴下終了後、更に同温度で2時間反応させてカルボキシル基と珪素原子に結合した加水分解性基を併有する数平均分子量が9,900の重合体(a′-6)を得た後、触媒(1)0.03質量部と脱イオン水70質量部との混合物を5分間で滴下し、更に同温度で1時間撹拌して加水分解縮合反応を行ない、カルボキシル基と珪素原子に結合した加水分解性基を併有する重合体セグメントとPTMS及びDMDMS由来のポリシロキサンセグメントからなる複合樹脂(A′B-6)を得た。次いで、メチルトリメトキシシランの縮合物(c-1)224質量部を添加し、更に、脱イオン水38質量部を添加して同温度で16時間撹拌し、加水分解縮合反応を行なって、前記複合樹脂(A′B-6)とメチルトリメトキシシランの縮合物(c-1)由来のポリシロキサンセグメント(C-1)が結合した複合樹脂(A′BC-6)を含有する反応液を得た。次いで、得られた反応液を、40~1.3kPaの減圧下、温度40~60℃の条件で2時間蒸留することにより、生成したメタノール及び水を除去した後、TEA8質量部を添加して複合樹脂(A′BC-6)中のカルボキシル基を中和して複合樹脂(ABC-6)とし、次いで、脱イオン水500質量部を添加することにより水性媒体中への分散を行ない、不揮発分が35.0%の複合樹脂(ABC-6)の水性分散体1,000質量部を得た。
合成例2で得られた複合樹脂(ABC-1)の水性分散体100質量部、可塑剤(D-1)(株式会社ADEKA製「アデカサイザー RS-1000」、ポリエーテルエステル系可塑剤)5質量部、及び3-グリシドキシプロピルトリメトキシシラン(以下、「GPTMS」と略記する。)4質量部を均一に混合し、水性樹脂組成物(1)を得た。
実施例1で使用した複合樹脂(ABC-1)を複合樹脂(ABC-2)~(ABC-4)に変更した以外は、実施例1と同様にして、水性樹脂組成物(2)~(4)を得た。
合成例3で得られた複合樹脂(ABC-2)の水性分散体100質量部、可塑剤(D-2)(DIC株式会社製「モノサイザー W-260」、エーテルエステル系可塑剤)5質量部、及びGPTMS5.3質量部を均一に混合し、水性樹脂組成物(5)を得た。
実施例5で使用した可塑剤(2)を可塑剤(D-3)(DIC株式会社製「モノサイザー PB-3A」、安息香酸エステル系可塑剤)に変更した以外は、実施例5と同様にして、水性樹脂組成物(6)を得た。
実施例5で使用した可塑剤(2)を可塑剤(D-4)(DIC株式会社製「モノサイザー DOA」、アジピン酸ジオクチル)に変更した以外は、実施例5と同様にして、水性樹脂組成物(7)を得た。
実施例5で使用した可塑剤(2)を可塑剤(D-5)(DIC株式会社製「モノサイザー DBP」、フタル酸ジブチル)に変更した以外は、実施例5と同様にして、水性樹脂組成物(8)を得た。
実施例5で使用した可塑剤(2)を可塑剤(D-6)(株式会社ADEKA製「アデカサイザー C-8」、トリメリット酸エステル系可塑剤)に変更した以外は、実施例1と同様にして、水性樹脂組成物(9)を得た。
合成例1と同様の反応容器に、PnP36質量部、IPA80質量部、PTMS32質量部、DMDMS19質量部及び可塑剤(D-1)5質量部を仕込んで、80℃まで昇温した。次いで、同温度でMMA99質量部、BMA86質量部、BA67質量部、AA16質量部、MPTS5質量部、PnP14質量部及びTBPEH14質量部を含有する混合物を、前記反応容器中へ4時間で滴下し、滴下終了後、更に同温度で2時間反応させることによって、可塑剤を含有するカルボキシル基と珪素原子に結合した加水分解性基を併有する数平均分子量が18,000の重合体(a’-10)を得た。次いで、触媒(1)0.9質量部と脱イオン水24質量部との混合物を、5分間で滴下し、更に同温度で10時間撹拌して加水分解縮合反応を行ない、カルボキシル基と珪素原子に結合した加水分解性基を併有する重合体セグメントとPTMS及びDMDMS由来のポリシロキサンセグメントからなる複合樹脂(A’B-10)を得た。次いで、メチルトリメトキシシランの縮合物(c-1)124質量部を投入して、加水分解縮合反応を行ない、前記複合樹脂(A’B-10)とメチルトリメトキシシランの縮合物(c-1)由来のポリシロキサンセグメントが結合した複合樹脂を含有する反応液を得た。次いで、DMEA9.9質量部を添加して複合樹脂(A’Bc-10)中のカルボキシル基を中和して複合樹脂(ABC-10)を得、次いで、脱イオン水580質量部を添加することにより水性媒体中への分散を行った。次いで、得られた反応液を、40~1.3kPaの減圧下、温度40~60℃の条件で2時間蒸留することにより、生成したメタノール、IPA及び水を除去し、不揮発分が40.0重量%の水性樹脂組成物(10’)を1,000質量部得た。
水性樹脂組成物(10’)100質量部、及びGPTMS7質量部を均一に混合し、水性樹脂組成物(10)を得た。
合成例1と同様の反応容器に、合成例3で得られた複合樹脂(A’B-2)493部と可塑剤(D-1)5質量部を添加して混合撹拌した後、メチルトリメトキシシランの縮合物(c-1)124質量部を投入して、加水分解縮合反応を行ない、前記複合樹脂(A’B-11)とメチルトリメトキシシランの縮合物(c-1)由来のポリシロキサンセグメントが結合した複合樹脂と可塑剤を含有する反応液を得た。次いで、DMEA9.9質量部を添加して複合樹脂(A’Bc-11)中のカルボキシル基を中和して複合樹脂(ABC-11)とし、次いで、脱イオン水580質量部を添加することにより水性媒体中への分散を行った。次いで、得られた反応液を、40~1.3kPaの減圧下、温度40~60℃の条件で2時間蒸留することにより、生成したメタノール、IPA及び水を除去し、可塑剤を内包した複合樹脂を含有する不揮発分40.0重量%の水性樹脂組成物(11’)を得た。
水性樹脂組成物(11’)100質量部、及びGPTMS7質量部を均一に混合し、水性樹脂組成物(11)を得た。
実施例1で使用した複合樹脂(ABC-1)を複合樹脂(ABC-2)に変更し、可塑剤(1)5質量部を可塑剤(D-3)1質量部に変更した以外は、実施例1と同様にして、水性樹脂組成物(12)を得た。
実施例1で使用した複合樹脂(ABC-1)を複合樹脂(ABC-2)に変更し、可塑剤(1)5質量部を可塑剤(D-3)10質量部に変更した以外は、実施例1と同様にして、水性樹脂組成物(13)を得た。
実施例1で使用した複合樹脂(ABC-1)を複合樹脂(ABC-2)に変更し、可塑剤(D-1)5質量部を可塑剤(3)30質量部に変更した以外は、実施例1と同様にして、水性樹脂組成物(14)を得た。
実施例1で使用した複合樹脂(ABC-1)を複合樹脂(ABC-2)に変更し、可塑剤(D-1)5質量部を可塑剤(3)50質量部に変更した以外は、実施例1と同様にして、水性樹脂組成物(15)を得た。
サンドミル(Grind to Hegman 8)の専用ポットに水47質量部、ビックケミー・ジャパン株式会社製「DISPERBYK-190」12質量部、ケマーズ株式会社製「Ti-Pure R-706」140質量部、ポッターズ・バロティーニ株式会社製「GB201」を仕込んで、25℃、3000rpmの条件下で30分間混練し、顔料分散体(1)を得た。
顔料分散体(1)66.6質量部、合成例2で得られた複合樹脂(ABC-2)の水性分散体100質量部、可塑剤(D-2)5質量部、及びGPTMS5.3質量部を均一に混合し、水性樹脂組成物(16)を得た。
顔料分散体(1)66.6質量部、合成例2で得られた複合樹脂(ABC-2)の水性分散体100質量部、可塑剤(D-2)20質量部、及びGPTMS5.3質量部を均一に混合し、水性樹脂組成物(17)を得た。
実施例1で使用した複合樹脂(ABC-1)を複合樹脂(ABC-2)に変更し、可塑剤(D-1)を使用しなかった以外は、実施例1と同様にして、水性樹脂組成物(R1)を得た。
実施例1で使用した複合樹脂(ABC-1)を複合樹脂(ABC-2)に変更し、可塑剤(D-1)5質量部の代わりにジエチレングリコールモノブチルエーテル(以下、「BDG」と略記する。)10質量部を用いた以外は、実施例1と同様にして、水性樹脂組成物(R2)を得た。
実施例16で使用した可塑剤(D-2)5質量部の代わりにBDG10質量部を用いた以外は、実施例16と同様にして、水性樹脂組成物(R3)を得た。
実施例14で使用した複合樹脂(ABC-2)を複合樹脂(ABC-5)に変更した以外は、実施例14と同様にして、水性樹脂組成物(R4)を得た。
実施例14で使用した複合樹脂(ABC-2)を複合樹脂(ABC-10)に変更し、GPTMS5.3質量部をGPTMS 4.5質量部に変更した以外は、実施例14と同様にして、水性樹脂組成物(R5)を得た。
株式会社エンジニアリングテストサービス製のクロメート処理されたアルミ板にアクリル-ウレタン系の白色塗料を塗装後、水研ぎした基材に、上記で得た水性樹脂組成物を乾燥後の膜厚が30μmとなるように塗装し、25℃の環境下で1週間乾燥させて評価用硬化塗膜Xを得た。
株式会社エンジニアリングテストサービス製のガラス板に上記で得た水性樹脂組成物を乾燥後の膜厚が30μmとなるように塗装し、5℃の環境下で24時間乾燥させて評価用硬化塗膜Yを得た。
上記で得られた評価用硬化塗膜Xを目視で観察し、下記の基準で塗膜外観を評価した。
○:クラックの発生が認められない。
△:若干のクラックの発生が認められる。
×:クラックの発生が認められる。
上記で得られた評価用硬化塗膜Xについて、JIS K-5600 碁盤目試験法に基づいて測定した。前記硬化塗膜の上にカッターで1mm幅の切込みを入れ碁盤目の数を100個とし、全ての碁盤目を覆うようにセロハンテープを貼り付け、すばやく引き剥がして付着して残っている碁盤目の数を数え、下記の基準で評価した。
○:はがれなし。
△:はがれの面積は、全碁盤目面積の1~64%。
×:はがれの面積は、全碁盤目面積の65%以上。
上記で得られた評価用硬化塗膜Xについて、50℃の温水に7日間浸漬した後に温水から取り出した直後の外観を目視で観察し、下記の基準1で評価した。但し、水性樹脂組成物(16)及び(17)については、浸漬前の塗膜が白色であるため、基準2で評価した。
(基準1)
○:白化が認められない。
△:白化が認められる。
×:基材からの剥がれが認められる。
(基準2)
○:光沢保持率が80%以上
△:光沢保持率が40%以上80%未満
×:光沢保持率が40%未満
耐水性試験前後の鏡面光沢反射率を、BYK株式会社製のマイクロ-トリ-グロスを用いて測定し、その光沢保持率を下記式に基づいて求めた。この光沢保持率の値が大きいほど、耐水性が良好であることを示す。
光沢保持率(%)=100×(耐水性試験後の塗膜の鏡面反射率)/(耐水性試験前の塗膜の鏡面反射率)
上記で得られた評価用硬化塗膜について、50℃の温水に7日間浸漬した後に温水から取り出し1時間静置した。その後、塗膜の上にカッターで1mm幅の切込みを入れ碁盤目の数を100個とし、全ての碁盤目を覆うようにセロハンテープを貼り付け、すばやく引き剥がして付着して残っている碁盤目の数を数え、下記の基準で評価した。
○:はがれなし。
△:はがれの面積は、全碁盤目面積の1~64%。
×:はがれの面積は、全碁盤目面積の65%以上。
上記で得られた評価用硬化塗膜Yについて、25℃の水に24時間浸漬した後に水から取り出した直後の外観を目視で観察し、下記の基準1で評価した。但し、水性樹脂組成物(16)及び(17)については、浸漬前の塗膜が白色であるため、基準2で評価した。
(基準1)
○:白化が認められない。
△:一部に白化が認められる。
×:基材からの剥がれが認められる。
(基準2)
○:光沢保持率が80%以上
△:光沢保持率が40%以上80%未満
×:光沢保持率が40%未満
上記で得られた評価用硬化塗膜について、エタノールを浸み込ませたフェルトで、硬化塗膜上を往復50回ラビングしたのちの硬化塗膜の状態を、指触及び目視により判定し、下記の基準で評価した。
○:軟化及び光沢低下が認められない。
△:若干の軟化又は光沢低下が認められる。
×:著しい軟化又は光沢低下が認められる。
上記で得られた評価用硬化塗膜について、硬化塗膜の一部を5%硫酸水溶液に浸し、25℃で7日間放置した後、硬化塗膜を水洗いし、乾燥した後の硬化塗膜の表面状態を目視で観察し、下記の基準で評価した。
○:エッチング跡が認められる
△:若干エッチング跡が認められる。
×:エッチングが著しく認められる。
上記で得られた評価用硬化塗膜について、デューパネル光ウェザーメーター(スガ試験機株式会社製、光照射時:30W/m2、70℃;湿潤時:湿度90%以上、50℃、光照射/湿潤サイクル=8時間/4時間)で1,000時間曝露を行なった後の塗膜を目視で観察し、下記の基準で塗膜外観を評価した。
○:クラックの発生が認められない。
△:若干のクラックの発生が認められる。
×:クラックの発生が認められる。
作製直後の評価用硬化塗膜の鏡面反射率(光沢値)(%)と、前記硬化塗膜を、デューパネル光ウェザーメーター(スガ試験機株式会社製、光照射時:30W/m2、70℃;湿潤時:湿度90%以上、50℃、光照射/湿潤サイクル=8時間/4時間)で1,000時間曝露した後の塗膜の鏡面反射率(光沢値)(%)の、曝露前の硬化塗膜の鏡面反射率(光沢値)に対する保持率(光沢保持率:%)〔(100×曝露後の塗膜の鏡面反射率)/(曝露前の硬化塗膜の鏡面反射率)〕で評価した。保持率の値が大きいほど、耐候性が良好であることを示す。鏡面反射率はBYK株式会社製のマイクロ-トリ-グロスを用いて測定した。
上記で得られた評価用硬化塗膜について、大阪府高石市のDIC株式会社堺工場内において3か月間曝露を行なった。曝露試験後の未洗浄の塗膜と、曝露試験前の塗膜との色差(ΔE)を、コニカミノルタセンシング株式会社製「CM-3500d」を用いて評価した。前記色差(ΔE)が小さいほど、耐汚染性が良好であることを示す。
上記で得られた評価用硬化塗膜について、70℃、相対湿度95%の雰囲気下に1ヶ月間静置した後、硬化塗膜の表面状態を指触により可塑剤の滲み出しの有無を評価した。評価基準は下記の通りである。
○:滲み出しなし。
△:若干滲み出しあり。
×:滲み出し著しい。
基材追従性の評価として、塗膜の伸度を測定した。
(塗膜伸度の測定方法)
ポリプロピレンフィルムからなる基材上に上記で得られた水性樹脂組成物を、膜厚が200μmとなるように塗装し、140℃の環境下で5分間乾燥させた後、更に25℃の環境下で24時間乾燥させ、該基材から剥離したものを試験塗膜(10mm×70mm)とした。
前記試験塗膜の伸度の測定は、株式会社島津製作所製「オートグラフAGS-1kNG(チャック間距離;20mm、引っ張り速度;300mm/分、測定雰囲気:22℃、60%RH)」を用いて行い、引張試験前の塗膜に対する伸び率に基づいて評価した。前記伸度は、20%以上であることが実用上好ましい。
Claims (5)
- 中和された酸基を有する重合体セグメント(A)及びポリシロキサンセグメント(B)が化学結合した複合樹脂(AB)のポリシロキサンセグメント(B)と、アルキル基の炭素原子数が1~3のアルキルトリアルコキシシランの縮合物(c)由来のポリシロキサンセグメント(C)とが珪素-酸素結合を介して結合している複合樹脂(ABC)が水性媒体中に溶解又は分散し、さらに可塑剤(D)を含有している水性樹脂組成物であり、前記複合樹脂(ABC)中の前記ポリシロキサンセグメント(B)及び前記ポリシロキサンセグメント(C)の合計の含有比率が15~85質量%であることを特徴とする水性樹脂組成物。
- 前記複合樹脂(ABC)100質量部に対して、前記可塑剤(D)を0.1~60質量部含有する請求項1又は2記載の水性樹脂組成物。
- 請求項1~3いずれか1項記載の水性樹脂組成物を含有することを特徴とするコーティング剤。
- 請求項4記載のコーティング剤の硬化塗膜を有することを特徴とする物品。
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US8138261B2 (en) * | 2006-07-27 | 2012-03-20 | Dic Corporation | Photocatalyst-containing water-based curable coating compositions and process for production thereof |
CN101153196B (zh) * | 2006-09-27 | 2012-05-23 | 大日本油墨化学工业株式会社 | 金属板一次防锈处理用水性组合物及一次防锈处理金属板 |
WO2013094769A1 (en) * | 2011-12-20 | 2013-06-27 | Kaneka Corporation | Waterproof coating material and building roof having coating film formed therefrom |
CA2864252C (en) * | 2012-02-14 | 2016-08-09 | Emerald Kalama Chemical, Llc | Monobenzoate useful as a plasticizer in adhesive preparations |
CN102702949A (zh) * | 2012-06-01 | 2012-10-03 | 安徽省金盾涂料有限责任公司 | 水性涂料组合物 |
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EP2995637B1 (en) * | 2014-09-11 | 2019-11-06 | Sherwin-Williams Deutschland GmbH | Coating composition for wood finishing |
WO2016137881A1 (en) * | 2015-02-23 | 2016-09-01 | King Industries | Curable coating compositions of silane functional polymers |
CN106519834A (zh) * | 2016-11-25 | 2017-03-22 | 广东国立科技股份有限公司 | 一种改性高分子涂料及其制备方法 |
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CN112368338A (zh) | 2021-02-12 |
EP3816233A1 (en) | 2021-05-05 |
JP6741172B2 (ja) | 2020-08-19 |
US20210189131A1 (en) | 2021-06-24 |
EP3816233A4 (en) | 2022-03-30 |
JPWO2020004001A1 (ja) | 2020-07-02 |
CN112368338B (zh) | 2022-06-14 |
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