WO2013084590A1 - 造膜助剤ならびにそれを含有する水性樹脂組成物及び鋼板表面処理剤 - Google Patents
造膜助剤ならびにそれを含有する水性樹脂組成物及び鋼板表面処理剤 Download PDFInfo
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- WO2013084590A1 WO2013084590A1 PCT/JP2012/076470 JP2012076470W WO2013084590A1 WO 2013084590 A1 WO2013084590 A1 WO 2013084590A1 JP 2012076470 W JP2012076470 W JP 2012076470W WO 2013084590 A1 WO2013084590 A1 WO 2013084590A1
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- C08K5/00—Use of organic ingredients
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- C08K5/053—Polyhydroxylic alcohols
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- 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
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
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- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
- C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
- C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
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- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
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- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/24—Catalysts containing metal compounds of tin
- C08G18/242—Catalysts containing metal compounds of tin organometallic compounds containing tin-carbon bonds
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- C08G18/3212—Polyhydroxy compounds containing cycloaliphatic groups
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- C08G18/30—Low-molecular-weight compounds
- C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
- C08G18/348—Hydroxycarboxylic acids
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/40—High-molecular-weight compounds
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- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
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- C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
- C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6633—Compounds of group C08G18/42
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- C08G18/721—Two or more polyisocyanates not provided for in one single group C08G18/73 - C08G18/80
- C08G18/722—Combination of two or more aliphatic and/or cycloaliphatic polyisocyanates
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- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
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- C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
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- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
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- C08K3/20—Oxides; Hydroxides
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
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- C08L33/08—Homopolymers or copolymers of acrylic acid esters
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/47—Levelling agents
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
Definitions
- the present invention relates to a film-forming auxiliary capable of imparting excellent film-forming properties to an aqueous resin composition that can be used, for example, as a coating agent or an adhesive, and an aqueous resin composition containing the same.
- the temperature is approximately 200 to 250 ° C.
- a method for drying a coating film is known.
- a coating agent is applied to the surface of a metal substrate, and the drying temperature is set to a low temperature of about 80 ° C., and the drying process is performed. It tends to be done in a short time. At such a temperature, the coating agent is difficult to form a film (leveling) sufficiently practically, so that there is a problem that a coating film defect or the like is likely to occur.
- a urethane resin having a large amount of urethane bonds or urea bonds is often used from the viewpoint of imparting high hardness to the formed coating film.
- a coating agent containing a urethane resin having a large amount of urethane bonds or urea bonds may not sufficiently form a film even after the high-temperature drying step. Therefore, a film-forming aid is used in combination with the urethane resin. In many cases, the film-forming property is improved.
- N-methyl-2-pyrrolidone is generally known and has been widely used since it can impart excellent film-forming properties to synthetic resins.
- the film-forming aid described above is less toxic or non-toxic compared to N-methyl-2-pyrrolidone, it has a problem that it is significantly inferior in film-forming performance.
- it since it is difficult to impart film-forming properties to urethane resins capable of forming a high-hardness coating film, it may still cause a decrease in solvent resistance, corrosion resistance, and chemical resistance of the coating film.
- the problem to be solved by the present invention is to provide a film-forming aid having a film-forming performance comparable to that of N-methyl-2-pyrrolidone and having a low toxicity.
- the problem to be solved by the present invention is that, for example, a urethane resin or a composite resin composed of a urethane resin and a vinyl resin can be imparted with excellent film-forming performance, and as a result, solvent resistance,
- An object of the present invention is to provide an aqueous resin composition containing a low-toxic film-forming aid capable of forming a coating film excellent in corrosion resistance and chemical resistance.
- the film-forming aid can impart excellent film-forming performance to urethane resins and composite resins having a high urethane bond amount and urea bond amount, and as a result, solvent resistance, countermeasure configuration and chemical resistance. It was found that an excellent coating film can be formed.
- the present invention relates to a film-forming auxiliary comprising at least one selected from the group consisting of 1,3-butanediol (A1) and 1,2-butanediol (2-1). It is.
- the present invention also relates to an aqueous resin composition
- an aqueous resin composition comprising the film-forming aid, a resin (B), and an aqueous medium (C).
- the film-forming auxiliary of the present invention is less toxic than N-methyl-2-pyrrolidone, while imparting a film-forming property comparable to that of N-methyl-2-pyrrolidone to an aqueous resin composition. Is possible.
- the aqueous resin composition of this invention containing the said film-forming auxiliary
- it will be used for various uses, such as coating agents, such as a steel plate surface treating agent, a plastic substrate or the glass substrate surface, and an adhesive agent, for example. It is possible. Moreover, even when the coating film drying temperature is low, it is possible to form a coating film having no coating film defects and having excellent solvent resistance, chemical resistance, corrosion resistance, and the like.
- the aqueous resin composition of the present invention includes, for example, acrylonitrile-butadiene-styrene resin (ABS resin), polycarbonate resin (PC resin), ABS / PC resin, polystyrene resin (PS resin), polymethyl methacrylate resin. Since it can be used suitably for plastic base materials, such as (PMMA resin), it can be used for the coating agent and adhesive agent which are used for manufacture of a mobile phone, a household appliance, an OA apparatus, a vehicle interior material, etc., for example.
- ABS resin polycarbonate resin
- PS resin polystyrene resin
- PMMA resin polymethyl methacrylate resin
- the aqueous resin composition of the present invention includes, for example, plated steel sheets such as galvanized steel sheets and aluminum-zinc alloy steel sheets, and rust on metal substrates such as aluminum plates, aluminum alloy plates, electromagnetic steel plates, copper plates, and stainless steel plates. Because it can form a coating with excellent corrosion resistance that can prevent the occurrence of corrosion, it can be used on surfaces such as building materials such as outer walls and roofs, civil engineering members such as guardrails, soundproof walls, and drainage grooves, home appliances, industrial machinery, and automobile parts. It can be used for painting.
- the film-forming aid of the present invention contains at least one selected from the group consisting of 1,3-butanediol (A1) and 1,2-butanediol (2-1), and other diols as necessary. It is characterized by containing a component.
- the film-forming aid has a relatively high boiling point despite its low molecular weight due to the interaction between the hydroxyl groups. It can be suitably used as a film-forming aid.
- the film-forming aid has a low molecular weight as compared to diethylene glycol dialkyl ether and dipropylene glycol dialkyl ether, which are conventionally known as film-forming aids, and therefore has a large amount of hydroxyl groups per unit mass. It is considered that the formation of a hydrogen bond existing between a urethane bond and a urea bond that can be present in the resin (B) described later is inhibited, and the film forming property of the aqueous resin composition can be improved.
- a film-forming auxiliary comprising at least one selected from the group consisting of 1,3-butanediol (A1) and 1,2-butanediol (2-1) is a variety of aqueous resin compositions. Excellent film forming properties can be imparted.
- 1,4-butanediol and ethylene glycol having a structure similar to that of the diol cannot be used as a substitute for N-methyl-2-pyrrolidone because there is a concern that it has toxicity.
- pentanediol and hexanediol are satisfactory in terms of toxicity, there are cases where sufficient film-forming properties cannot be imparted to the aqueous resin composition.
- the said pentanediol and hexanediol remain easily in a dry coating film, As a result, the solvent resistance of a coating film, chemical resistance, and water resistance may be reduced. Further, the use of 1,3-propanediol alone as a film-forming aid tends to slightly lower the water resistance of the coating film.
- 1,3-butanediol (A1) is an essential component, and 1,2-butanediol (2-1), 1,3-propanediol (2-2), and 1,2,
- the use of a combination of one or more diols (A2) selected from the group consisting of propanediol (2-3) further improves the film-forming property and further improves the solvent resistance; It is preferable when forming a coating film having chemical resistance, corrosion resistance and water resistance.
- the film forming aid it is possible to use a combination of 1,3-butanediol (A1) and 1,2-propanediol (2-2), which has a high urethane bond amount and urea bond amount. It is preferable because even better film-forming performance can be imparted to urethane resins and composite resins.
- the 1,3-butanediol (A1) and the diol (A2) are used in combination as the film-forming aid, their mass ratio [the diol (A2) / the 1,3-butanediol (A1) ] Is preferably used in the range of 0.1 to 3, and in the range of 0.2 to 2, the film-forming property is further improved, and as a result, solvent resistance, chemical resistance and corrosion resistance are improved. It is more preferable in forming a coating film excellent in the thickness.
- the aqueous resin composition of the present invention contains the film-forming aid, the resin (B), the aqueous medium (C), and other additives as necessary.
- the aqueous resin composition of the present invention contains the film-forming aid, it has excellent film-forming properties, and as a result, can form a coating film with excellent solvent resistance, chemical resistance, and corrosion resistance. it can.
- aqueous resin composition of the present invention examples include an embodiment in which the film-forming aid and the resin (B) are dissolved or dispersed in the aqueous medium (C). Moreover, as said aqueous resin composition, the aspect which a part or all of the said film forming adjuvant exists in the aqueous medium (C) in the state which was inherent in the said resin (B) particle
- grains is mentioned.
- the aqueous resin composition preferably has a nonvolatile content of 10% by mass to 60% by mass.
- the non-volatile content is the mass of the aqueous resin composition after drying with respect to the mass of the aqueous resin composition before drying when the aqueous resin composition is left in an environment of 140 ° C. for 90 minutes and dried. It is a ratio.
- the film-forming aid is preferably in the range of 1% by mass to 30% by mass, more preferably 2% by mass to 15% by mass, and further preferably 2% by mass to 10% by mass with respect to the total amount of the aqueous resin composition.
- the mass ratio of the film-forming aid to the aqueous medium (C) described later is preferably 0.01 to 1, more preferably 0.8. It can be used in the range of 02 to 0.3, more preferably 0.02 to 0.2.
- the resin (B) is preferably contained in the range of 10% by mass to 60% by mass and more preferably in the range of 20% by mass to 45% by mass with respect to the total amount of the aqueous resin composition. preferable.
- Various resins can be used as the resin (B) used in the aqueous resin composition.
- a urethane resin (b1) suitably used for a coating agent or an adhesive or a composite resin (b2) composed of a urethane resin and a vinyl resin, alone or in combination. It is preferable for imparting substrate followability and adhesion.
- the resin (B) may not be able to sufficiently improve its film-forming property even if a general film-forming aid is used due to the presence of urethane bonds and urea bonds. If the film-forming auxiliary of the present invention is used, excellent film-forming properties can be imparted to the resin (B) without imparting toxicity.
- the “total amount of urethane bond and urea bond” can be used when the amount of the isocyanate group of the polyisocyanate used when producing the resin (B) is produced when the resin (B) is produced. It refers to the value divided by the total mass of polyisocyanate, polyol and chain extender.
- the total amount of urethane bonds and urea bonds is 1.2 mmol / g to 5 mmol with respect to the total amount of the urethane resin (b1). Even if it exists in the range of / g, it can be used. In particular, it is preferable to use a coating film in the range of 2 mmol / g to 4 mmol / g from the viewpoint of achieving both high hardness of the coating film to be formed and excellent film forming properties and low toxicity.
- urethane is used with respect to the total amount of the urethane resin constituting the composite resin (b2). Even if the total amount of the bond and the urea bond is in the range of 1.2 mmol / g to 5 mmol / g, it can be used. In particular, it is preferable to use a coating film in the range of 2 mmol / g to 4 mmol / g from the viewpoint of achieving both high hardness of the coating film to be formed and excellent film forming properties and low toxicity.
- the urethane resin which comprises the said composite resin (b2) points out the structure formed with the polyol and polyisocyanate which comprise it, and the chain extender used as needed.
- the “total amount of urethane bond and urea bond” possessed by the composite resin (b2) refers to the amount of the isocyanate group of the polyisocyanate used when producing the composite resin (b2). It refers to the value divided by the total mass of the polyisocyanate, polyol and chain extender used when producing b2).
- the resin (B) preferably has a hydrophilic group for stable dispersion in the aqueous medium (C).
- hydrophilic group for example, an ionic group such as an anionic group or a cationic group, or a nonionic group can be used. Of these, the use of an ionic group is preferable for imparting good water dispersion stability.
- examples of the anionic group include a carboxyl group, a sulfonic acid group, a carboxylate group formed by neutralizing them, a sulfonate group, a sulfate ester group, a phosphonate group, and a phosphoric acid monoester.
- a carboxyl group, a sulfonic acid group, a carboxylate group formed by neutralizing them a sulfonate group, a sulfate ester group, a phosphonate group, and a phosphoric acid monoester.
- a carboxyl group or a carboxylate group obtained by neutralizing the carboxyl group is preferable.
- examples of the cationic group include a quaternary ammonium base, a tertiary amino group, a secondary amino group, and a primary amino group.
- a tertiary amino group is preferred.
- the tertiary amino group may be present in the main chain constituting the resin (B). However, in order to obtain an aqueous resin composition exhibiting high water dispersibility and excellent film forming properties. As shown in the following general formula [I], it may be present in the side chain.
- R 1 represents an alkylene group, a dihydric phenol residue, or a polyoxyalkylene group
- R 2 and R 3 each independently represent an alkyl group that may contain an aliphatic cyclic structure
- R 4 represents a hydrogen atom or a residue of a quaternizing agent introduced by a quaternization reaction
- X ⁇ represents an anionic counter ion.
- the anionic group or cationic group is preferably present in the range of 10 mmol / kg to 2,000 mmol / kg, particularly preferably 10 mmol / kg with respect to the resin (B). It is in the range of ⁇ 700 mmol / kg.
- the resin (B) those having a weight average molecular weight in the range of 5,000 to 500,000 are used from the viewpoint of forming a coating film having excellent film forming properties and excellent solvent resistance and chemical resistance. It is preferable to do.
- urethane resin (b1) a urethane resin obtained by reacting a polyol, a polyisocyanate, and, if necessary, a chain extender can be used.
- the urethane resin (b1) is a precursor (b1) that is a urethane prepolymer by reacting a polyol with a polyisocyanate in the absence of a solvent or in the presence of an organic solvent different from the film-forming aid. '), And then, if necessary, neutralizing a part or all of the hydrophilic group is mixed with the aqueous medium (C), and if necessary, subjected to chain extension reaction and dispersed in water. Can be manufactured by.
- polyol that can be used in the production of the urethane resin (b1) for example, a polyol having the hydrophilic group and, if necessary, another polyol can be used in combination.
- polyol having a hydrophilic group for example, a polyol having an anionic group and a polyol having a cationic group can be used.
- polyol having an anionic group for example, a polyol having a carboxyl group or a polyol having a sulfonic acid group can be used.
- polyol having a carboxyl group for example, 2,2-dimethylolpropionic acid, 2,2-dimethylolbutanoic acid, 2,2-dimethylolvaleric acid and the like can be used.
- polyester polyol which has a carboxyl group obtained by making the polyol which has the said carboxyl group, and polycarboxylic acid react can also be used.
- polyol having a sulfonic acid group examples include dicarboxylic acids such as 5-sulfoisophthalic acid, sulfoterephthalic acid, 4-sulfophthalic acid, and 5 [4-sulfophenoxy] isophthalic acid, and salts thereof, and the low molecular weight polyol.
- dicarboxylic acids such as 5-sulfoisophthalic acid, sulfoterephthalic acid, 4-sulfophthalic acid, and 5 [4-sulfophenoxy] isophthalic acid, and salts thereof, and the low molecular weight polyol.
- a polyester polyol having a sulfonic acid group obtained by reacting with can be used.
- the anionic group is preferably partially or completely neutralized with a basic compound or the like in order to develop good water dispersibility.
- Examples of basic compounds that can be used for neutralizing the anionic group include organic amines such as ammonia, triethylamine, and morpholine, alkanolamines such as monoethanolamine and diethylethanolamine, sodium, potassium, and lithium.
- organic amines such as ammonia, triethylamine, and morpholine
- alkanolamines such as monoethanolamine and diethylethanolamine, sodium, potassium, and lithium.
- the metal etc. which contain can be used.
- polyol having a cationic group for example, a polyol having a tertiary amino group can be used.
- N-alkyl dialkanolamines such as N-methyl-diethanolamine and N-butyl-diethanolamine can be used.
- polyol having a tertiary amino group a polyol obtained by reacting a compound having two epoxy groups with a secondary amine can be used.
- a polyol having a tertiary amino group obtained by reacting a compound having two epoxy groups represented by the following general formula [II] with a secondary amine can be used.
- R 1 represents an alkylene group, a residue of a dihydric phenol, or a polyoxyalkylene group.
- the R 1 is an aliphatic alkyl chain such as ethylene, propylene, butene, pentene or the like.
- an alkylene chain having an aliphatic cyclic structure such as cyclohexene, a residue of a dihydric phenol such as bisphenol A, a polyoxyalkylene chain derived from polyethylene glycol, polypropylene glycol, or the like.
- diglycidyl ether of polyoxyalkylene glycol in which R 1 in the general formula [II] is a polyoxyalkylene group in particular, polyoxyethylene glycol-diglycidyl ether, polyoxypropylene glycol-diglycidyl ether And diglycidyl ether of ethylene oxide-propylene oxide copolymer can be preferably used.
- Examples of the secondary amine that can react with the compound having two epoxy groups include dimethylamine, diethylamine, di-n-propylamine, diisopropylamine, di-n-butylamine, di-tert-butylamine, and di-sec-.
- Butylamine, di-n-pentylamine, di-n-peptylamine, di-n-octylamine, diisooctylamine, dinonylamine, diisononylamine, di-n-decylamine, di-n-undecylamine, di-n- Dodecylamine, di-n-pentadecylamine, di-n-octadecylamine, di-n-nonadecylamine, di-n-eicosylamine and the like can be used.
- reaction between the compound having two epoxy groups and the secondary amine is compounded so that the equivalent of the secondary amino group is 1 equivalent to 1 equivalent of the epoxy group of the compound. Can be done below.
- the cationic group is preferably partially or completely neutralized with the following acidic compound.
- the acidic compound include organic acids such as formic acid, acetic acid, propionic acid, succinic acid, glutaric acid, butyric acid, lactic acid, malic acid, citric acid, tartaric acid, malonic acid, adipic acid, sulfonic acid, and paratoluenesulfonic acid.
- Organic sulfonic acids such as methanesulfonic acid
- inorganic acids such as hydrochloric acid, sulfuric acid, nitric acid, orthophosphoric acid, polyphosphoric acid, polymetaphosphoric acid, orthophosphorous acid, boric acid, and hydrofluoric acid can be used. These acids can be used alone or in combination of two or more, and it is particularly preferable to use orthophosphoric acid or orthophosphorous acid.
- the acidic compound is preferably in the range of 0.1 equivalents to 3 equivalents, more preferably in the range of 0.3 equivalents to 2.0 equivalents, with respect to 1 equivalent of the cationic group. .
- a part or all of the tertiary amino group in the cationic group is quaternized.
- the quaternizing agent usable for the quaternization of the tertiary amino group include dialkyl sulfates such as dimethyl sulfate and diethyl sulfate, methyl chloride, ethyl chloride, benzyl chloride, methyl bromide, ethyl bromide, and benzyl.
- Alkyl halides such as bromide, methyl iodide, ethyl iodide, benzyl iodide, alkyl or aryl sulfonates such as methyl methanesulfonate and methyl paratoluenesulfonate, ethylene oxide, propylene oxide, butylene oxide, styrene Epoxys such as oxide, epichlorohydrin, allyl glycidyl ether, butyl glycidyl ether, 2-ethylhexyl glycidyl ether, phenyl glycidyl ether, etc. can be used. It is preferred to use chill sulfate.
- the quaternizing agent is preferably in the range of 0.1 to 3 equivalents relative to 1 equivalent of the tertiary amino group, and more preferably in the range of 0.3 to 2 equivalents. .
- the polyol having a hydrophilic group as described above is preferably used in the range of 3% by mass to 20% by mass with respect to the total polyol used for the production of the urethane resin (b1).
- Examples of other polyols that can be used for the polyol used in the production of the urethane resin (b1) include polyester polyols, polyether polyols, polycarbonate polyols, polyacetal polyols, polyacrylate polyols, polyester amide polyols, and polythioether polyols.
- Polyolefin polyols such as polybutadiene can be used.
- polyester polyol examples include those obtained by esterifying low molecular weight polyols and polycarboxylic acids, polyesters obtained by ring-opening polymerization reaction of cyclic ester compounds such as ⁇ -caprolactone, and copolymers thereof. Polyester or the like can be used.
- low molecular weight polyol examples include ethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, and 1,5-pentanediol.
- polycarboxylic acid examples include succinic acid, adipic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, maleic acid, fumaric acid, 1,3-cyclopentanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, and 1,4.
- polyether polyol examples include addition polymerization of alkylene oxides such as ethylene oxide and propylene oxide using one or more compounds having two or more active hydrogen atoms such as ethylene glycol and diethylene glycol as an initiator. Can be used.
- the initiator examples include ethylene glycol, diethylene glycol, triethylene glycol, trimethylene glycol, 1,2-propanediol, 1,3-propanediol, 1,3-butanediol, and 1,4-butane.
- alkylene oxide for example, ethylene oxide, propylene oxide, butylene oxide, styrene oxide, epichlorohydrin, tetrahydrofuran, cyclohexylene and the like can be used.
- polycarbonate polyol examples include diols such as 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and cyclohexanedimethanol, and carbonate esters such as dimethyl carbonate, diethyl carbonate, and ethylene carbonate. What was obtained by reacting with phosgene etc. can be used.
- the polyester polyol or the polycarbonate polyol from the viewpoint of forming a coating film excellent in heat discoloration.
- the polyol preferably has a number average molecular weight of 300 to 10,000, preferably 500 to 6,000.
- Examples of the other polyols include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, hexamethylene glycol, and hydrogenation.
- Glycols such as bisphenol A, cyclohexanedimethanol, saccharose, methylene glycol, glycerin, trimethylolpropane, sorbitol; bisphenol A, 4,4′-dihydroxydiphenyl, 4,4′-dihydroxydiphenyl ether, 4,4′-dihydroxydiphenyl Phenols such as sulfone and hydroquinone, water, and the like can be used.
- polyisocyanate used when manufacturing the said urethane resin (b1) aliphatic polyisocyanate, polyisocyanate which has an aliphatic cyclic structure, or aromatic polyisocyanate is used individually, or 2 or more types Can be used in combination.
- aliphatic polyisocyanate hexamethylene diisocyanate, lysine diisocyanate methyl ester, xylylene diisocyanate, tetramethyl xylylene diisocyanate and the like can be used alone or in combination of two or more. .
- polyisocyanate having an aliphatic cyclic structure examples include isophorone diisocyanate, bis (isocyanatomethyl) cyclohexane, dicyclohexylmethane diisocyanate, cyclohexane diisocyanate, methylcyclohexane diisocyanate, dicyclohexyldimethylmethane diisocyanate, 2,2′-.
- isophorone diisocyanate, dicyclohexylmethane diisocyanate, norbornene diisocyanate is used from the viewpoint of further improving the solvent resistance, chemical resistance, corrosion resistance, and water resistance of the coating film formed by the aqueous resin composition of the present invention. It is preferable to do.
- a urethane resin obtained by using a polyisocyanate having an aliphatic cyclic structure such as isophorone diisocyanate has excellent coating performance as described above, the film forming property tends to be slightly lowered.
- the aliphatic cyclic structure can be used even when used in combination with a urethane resin obtained using the polyisocyanate having the aliphatic cyclic structure. It is possible to improve the film forming property without impairing the performance due to the polyisocyanate possessed.
- aromatic polyisocyanate specifically, phenylene diisocyanate, tolylene diisocyanate, diphenylmethane diisocyanate, naphthalene diisocyanate and the like can be used alone or in combination of two or more.
- the polyisocyanate it is possible to use the one in which the sum of the contents of the aliphatic polyisocyanate and the polyisocyanate having an aliphatic cyclic structure is 10% by mass to 100% by mass with respect to the polyisocyanate. It is preferable for obtaining an aqueous resin composition capable of forming a coating film having high heat discoloration.
- the reaction between the polyol and the polyisocyanate is preferably carried out, for example, when the equivalent ratio of the isocyanate group of the polyisocyanate to the hydroxyl group of the polyol is in the range of 1.05 to 3, preferably 1.05 to 2. It is more preferable to carry out within a range.
- the reaction of the polyol and polyisocyanate used for producing the urethane resin (b1) can be usually performed in a temperature range of 50 ° C to 150 ° C.
- amine properties such as mechanical properties and thermal properties, specifically, for the purpose of imparting high hardness and toughness to the coating film, are polyamines as necessary.
- Chain extenders such as hydrazine compounds and other compounds may be used.
- polyamines examples include ethylenediamine, 1,2-propanediamine, 1,6-hexamethylenediamine, piperazine, 2,5-dimethylpiperazine, isophoronediamine, 4,4'-dicyclohexylmethanediamine, 3,3'- Diamines such as dimethyl-4,4′-dicyclohexylmethanediamine, 1,4-cyclohexanediamine; N-hydroxymethylaminoethylamine, N-hydroxyethylaminoethylamine, N-hydroxypropylaminopropylamine, N-ethylaminoethylamine, N -A diamine having one primary amino group and one secondary amino group such as methylaminopropylamine; polyamines such as diethylenetriamine, dipropylenetriamine and triethylenetetramine can be used. That.
- hydrazine compound for example, hydrazine such as hydrazine, N, N′-dimethylhydrazine, 1,6-hexamethylenebishydrazine can be used.
- Examples of other compounds used for the chain extender include dihydrazides such as succinic acid dihydrazide, adipic acid dihydrazide, glutaric acid dihydrazide, sebacic acid dihydrazide, and isophthalic acid dihydrazide; ⁇ -semicarbazide propionic acid hydrazide, 3-semicarbazide Semicarbazides such as -propyl-carbazate, semicarbazide-3-semicarbazidemethyl-3,5,5-trimethylcyclohexane can be used.
- dihydrazides such as succinic acid dihydrazide, adipic acid dihydrazide, glutaric acid dihydrazide, sebacic acid dihydrazide, and isophthalic acid dihydrazide
- ⁇ -semicarbazide propionic acid hydrazide 3-semicarbazide
- Semicarbazides such as -propyl-carbazate,
- the equivalent ratio of the amino group to the isocyanate group of the urethane prepolymer (B ′) may be used within a range of 1.9 or less (equivalent ratio). It is preferable to use in the range of 0.3 to 1.0 (equivalent ratio).
- the urethane resin (b1) may have other functional groups as required in addition to the carboxyl group, the carboxylate group, the hydrolyzable silyl group, and the silanol group.
- An amino group, an imino group, a hydroxyl group, an epoxy group, etc. are mentioned.
- a crosslinking agent having a functional group capable of reacting with them when forming a coating film is mentioned.
- the composite resin (b2) a composite resin composed of a urethane resin and a vinyl resin can be used.
- the composite resin (b2) is a composite resin in which some or all of the vinyl polymer is contained in urethane resin particles.
- the vinyl polymer is a polymer of a monomer having a polymerizable unsaturated double bond, and refers to, for example, a polymer of a (meth) acryl monomer or an olefin.
- the urethane resin and the vinyl polymer do not form a chemical bond, specifically, a covalent bond, in order to easily improve the film forming property of the aqueous resin composition obtained. That is, it is preferable that the composite resin (b2) does not partially form covalent bonds with the urethane resin particles when a part or all of the vinyl polymer is contained in the urethane resin particles.
- the composite resin (b2) preferably has a mass ratio [urethane resin / vinyl resin] of the urethane resin and vinyl resin constituting the composite resin (b2) in the range of 0.1 to 10, More preferably, it is the range.
- the composite resin (b2) it is possible to use a resin composed of a urethane resin having an anionic group as a hydrophilic group and a vinyl resin having an amino group, preferably a tertiary amino group. It is preferable for improving solvent resistance and chemical resistance.
- the anionic group can be introduced into the urethane resin by using a compound having an acid group such as 2,2-dimethylolpropionic acid when the urethane resin is produced.
- the amino group can be introduced into the vinyl resin by using a vinyl monomer having a (tertiary) amino group such as dimethylaminoethyl (meth) acrylate when the vinyl resin is produced. it can.
- (meth) acrylate refers to one or both of acrylate and methacrylate.
- the composite resin (b2) can be produced, for example, by the following method.
- Step (X2) of producing a urethane resin which is a precursor (b2 ′) of the composite resin (b2) in the absence of a solvent or in the presence of an organic solvent, neutralizing as necessary, the precursor ( b2 ′) is dispersed in the aqueous medium (C) (Y2), and the precursor (b2 ′) is subjected to chain extension reaction (Z2) as necessary, and then the vinyl monomer is divided.
- the polymerization initiators are separated separately, or the mixture thereof is batched or divided, and supplied to the aqueous dispersion of urethane resin as the precursor (b2 ′), By polymerizing the vinyl monomer in the urethane resin particles, an aqueous dispersion of the composite resin (b2) can be produced.
- the aqueous dispersion of the precursor (b2 ′) does not contain an emulsifier.
- Method 2 A step (X3) of producing a urethane resin which is a precursor (b2 ′) of the composite resin (b2) by reacting a polyol and polyisocyanate in the presence of a vinyl monomer, if necessary.
- the step of neutralizing and dispersing the precursor (b2 ′) in the aqueous medium (C) (Y3), and the step of subjecting the precursor (b2 ′) to chain extension (Z3) as necessary Thereafter, a method for producing a composite resin (b2) by adding vinyl monomers in a divided or batch manner and polymerizing the vinyl monomers as necessary.
- the vinyl monomer in the step (X3) for producing the urethane resin those having no reactive functional group, particularly those having no reactivity with the isocyanate group are used. It is preferable to do.
- the vinyl monomer added after the step (Z3) of chain extension reaction is not particularly limited.
- vinyl monomer examples include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, t-butyl (meth) acrylate, 2-ethylhexyl (meth) ) (Meth) acrylates such as acrylate, cyclohexyl (meth) acrylate, dodecyl (meth) acrylate, stearyl (meth) acrylate, isobornyl (meth) acrylate, dicyclopentanyl (meth) acrylate, etc .; vinyl acetate, etc.
- unsaturated nitriles such as (meth) acrylonitrile
- vinyl compounds having an aromatic ring such as styrene, ⁇ -methylstyrene, divinylstyrene; butadiene, isoprene, N-vinylpyrrolidone, etc.
- the vinyl monomer having no reactive functional group includes methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, t-butyl.
- (meth) acrylate monomers such as (meth) acrylate, 2-ethylhexyl (meth) acrylate, cyclohexyl (meth) acrylate, and isobornyl (meth) acrylate, which are used for the production of vinyl polymers. It is preferable to use it in the range of 70% by mass to 100% by mass with respect to the total amount of vinyl monomers to be used because the resulting coating film is excellent in solvent resistance, water resistance, chemical resistance and the like.
- a vinyl monomer having a reactive functional group can be used.
- a polymerizable monomer having an epoxy group such as glycidyl (meth) acrylate or allyl glycidyl ether
- 2-hydroxy Polymerizable monomers having a hydroxyl group such as ethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, polyethylene glycol mono (meth) acrylate
- polymerizable monomers having a carboxyl group such as acrylic acid, methacrylic acid, and itaconic acid
- Polymeric monomer having an amide group such as (meth) acrylamide, N-monoalkyl (meth) acrylamide, N, N-dialkyl (meth) acrylamide
- carbonyl group such as acrolein or diacetone (meth) acrylamide
- the vinyl monomer having a reactive functional group is preferably used in the range of 0.1 to 30% by mass with respect to the total amount of the vinyl monomer used for the production of the vinyl polymer.
- Examples of the polymerization initiator that can be used for producing the vinyl polymer include radical polymerization initiators such as persulfates, organic peroxides, and hydrogen peroxide, and 4,4′-azobis (4-cyano).
- An azo initiator such as valeric acid) or 2,2′-azobis (2-amidinopropane) dihydrochloride can be used.
- the radical polymerization initiator may be used as a redox polymerization initiator in combination with a reducing agent described later.
- persulfates examples include potassium persulfate, sodium persulfate, and ammonium persulfate.
- organic peroxides include, for example, peroxidation. Diacyl peroxides such as benzoyl, lauroyl peroxide and decanoyl peroxide, dialkyl peroxides such as t-butylcumyl peroxide and dicumyl peroxide, t-butylperoxylaurate, t-butylperoxybenzoate, etc. Peroxyesters, cumene hydroperoxide, paramentane hydroperoxide, hydroperoxides such as t-butyl hydroperoxide, and the like can be used.
- reducing agent examples include ascorbic acid and its salt, erythorbic acid and its salt, tartaric acid and its salt, citric acid and its salt, metal salt of formaldehyde sulfoxylate, sodium thiosulfate, sodium bisulfite, chloride Ferric iron or the like can be used.
- the polymerization initiator may be used in an amount that allows the polymerization to proceed smoothly. However, a smaller amount is preferable from the viewpoint of maintaining excellent water resistance of the resulting coating film, and it is used for the production of a vinyl polymer.
- the content is preferably 0.01% by mass to 0.5% by mass with respect to the total amount of the vinyl monomer. Moreover, when using the said polymerization initiator together with the said reducing agent, it is preferable that the usage-amount of those total amounts is also in the above-mentioned range.
- aqueous medium (C) used in the present invention only water may be used, or a mixed solution of water and a water-soluble solvent may be used.
- the water-soluble solvent include monoalcohols such as methyl alcohol, ethyl alcohol, isopropyl alcohol, ethyl carbitol, ethyl cellosolve, and butyl cellosolve, and polar solvents such as methyl ethyl ketone and N-methyl-2-pyrrolidone.
- polar solvents such as methyl ethyl ketone and N-methyl-2-pyrrolidone.
- the amount of the water-soluble solvent used is preferably reduced as much as possible in consideration of the danger of ignition and the harmfulness of the aqueous resin composition of the present invention. Therefore, it is particularly preferable to use water alone as the aqueous medium (C).
- the aqueous dispersion of the resin (B) obtained above and a film-forming aid can be mixed and stirred.
- the method for producing the aqueous resin composition of the present invention includes a method for producing the aqueous dispersion of the resin (B) obtained above by producing a film-forming aid in the course of producing the aqueous dispersion.
- the film-forming aid is passed through the step (Y1). The method of supplying an agent is mentioned.
- a step of producing a urethane resin that is a precursor (b2 ′) of the composite resin (b2) in the absence of a solvent or in the presence of an organic solvent (X2) Step (Y2) of neutralizing the precursor (b2 ′) in the aqueous medium (C), if necessary, and chain extension of the precursor (b2 ′) if necessary
- step (Z2) of reacting when the composite monomer (b2) is produced by polymerizing the vinyl monomer by adding the vinyl monomer in a divided or batch, after the step (Y2), A method for supplying the film-forming aid may be mentioned.
- the process (X3) which manufactures the urethane resin which is a precursor (b2 ') of the said composite resin (b2) by making a polyol and polyisocyanate react in presence of a vinyl monomer, It neutralizes as needed. Necessary after passing through the step (Y3) of dispersing the precursor (b2 ′) in the aqueous medium (C), and the step (Z3) of chain extension reaction of the precursor (b2 ′) as necessary When the composite resin (b2) is produced by adding vinyl monomers in a divided or batchwise manner and polymerizing the vinyl monomer, the film-forming aid is supplied after the step (Y3). The method of doing is mentioned.
- Examples of the organic solvent that can be used in the reaction include ketones such as acetone and methyl ethyl ketone; tetrahydrofuran, dioxane, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, propylene glycol dimethyl ether, and propylene glycol diethyl.
- Ethers such as ether and dipropylene glycol dimethyl ether; and acetates such as ethyl acetate and butyl acetate can be used alone or in combination of two or more.
- aqueous urethane resin composition it is preferable to use methyl ethyl ketone having high urethane resin solubility when the organic solvent is distilled off, and dipropylene glycol dimethyl ether having low toxicity when the organic solvent remains. .
- the solvent may be removed as necessary.
- a compound having a hydrophilic group may be used as an aid for assisting the water solubility or water dispersibility of the resin (B).
- a compound having an anionic group a compound having a cationic group, a compound having an amphoteric group, or a compound having a nonionic group can be used. From the viewpoint of maintaining excellent storage stability of the product, it is preferable to use a compound having a nonionic group.
- Examples of the compound having a nonionic group include a group having at least one active hydrogen atom in a molecule and consisting of a repeating unit of ethylene oxide, and a repeating unit of ethylene oxide and another alkylene oxide.
- a compound having at least one functional group selected from the group consisting of can be used.
- polyoxyethylene glycol or polyoxyethylene-polyoxypropylene having a number average molecular weight of 300 to 20,000 having at least 30% by mass or more of ethylene oxide repeating units and having at least one active hydrogen atom in the polymer
- Nonionic group compounds such as copolymer glycols, polyoxyethylene-polyoxybutylene copolymer glycols, polyoxyethylene-polyoxyalkylene copolymer glycols or monoalkyl ethers thereof, or polyesters obtained by copolymerization thereof
- Compounds such as polyether polyols can be used.
- a curing agent or a curing catalyst may be used in combination as necessary within a range not impairing the effects of the present invention.
- a compound having a silanol group and / or a hydrolyzable silyl group for example, a compound having a silanol group and / or a hydrolyzable silyl group, a polyepoxy compound, a polyoxazoline compound, a polyisocyanate, or the like can be used.
- a compound having a silanol group and / or a hydrolyzable silyl group as the curing agent in order to form a crosslinked coating film having excellent solvent resistance.
- the hydrolyzable silyl group or silanol group of the compound improves the adhesion with the metal of the substrate, and as a result, A coating film excellent in corrosion resistance can be formed.
- an alkoxysilyl group is preferably used because of its high crosslinkability and improved solvent resistance.
- a trimethoxysilyl group and a triethoxysilyl group are preferable because of excellent crosslinkability and improved solvent resistance.
- Examples of the compound having a silanol group and / or a hydrolyzable silyl group include ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, ⁇ -glycidoxypropylmethyldimethoxysilane, ⁇ -Epoxysilane compounds such as glycidoxypropylmethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane, and ⁇ -aminopropyl Aminosilanes such as trimethoxysilane, ⁇ -aminopropyltriethoxysilane, ⁇ -aminopropylmethyldimethoxysilane, and ⁇ -aminopropylmethyldiethoxysilane can be used.
- At least one selected from the group consisting of ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, and 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane is used. It is preferable because the crosslinking density of the coating film is improved and the chemical resistance and solvent resistance are improved.
- the total amount of the resin (B) is preferably 0.1 to 10% by mass.
- Examples of the curing catalyst that can be used in the aqueous resin composition of the present invention include lithium hydroxide, sodium hydroxide, potassium hydroxide, sodium methylate, tetraisopropyl titanate, tetra-n-butyl titanate, and tin octylate.
- the aqueous resin composition of the present invention may contain an emulsifier, a dispersion stabilizer and a leveling agent as necessary, but from the viewpoint of suppressing a decrease in water resistance of the crosslinked coating film, it may not contain as much as possible. Preferably, it is 0.5% by mass or less based on the solid content of the aqueous resin composition.
- the aqueous resin composition of the present invention can be used for various coating agents for the purpose of protecting the surface of various substrates and imparting design properties to various substrates.
- the substrate examples include various plastics and films thereof, metal, glass, paper, and wood.
- the coating agent of the present invention when used for various plastic substrates, a coating film having excellent solvent resistance and water resistance can be formed even in a drying process at a relatively low temperature, and the coating film from the plastic substrate can be formed. Peeling can be prevented.
- ABS resin acrylonitrile-butadiene-styrene resin
- PC resin polycarbonate resin
- ABS / PC resin polystyrene resin
- PS resin polystyrene resin
- PMMA resin polymethylmethacrylate resin
- acrylic resin polypropylene resin
- polyethylene resin polyethylene resin
- plastic film base materials include polyethylene terephthalate film, polyester film, A polyethylene film, a polypropylene film, a TAC (triacetyl cellulose) film, a polycarbonate film, a polyvinyl chloride film and the like can be used.
- the coating agent of the present invention can form a densely formed crosslinked coating film that can suppress corrosion of the metal material itself, it can be suitably used as a coating agent for metal substrates.
- metal substrates examples include galvanized steel sheets used for applications such as automobiles, home appliances, and building materials, and plated steel sheets such as aluminum-zinc alloy steel sheets, aluminum plates, aluminum alloy plates, electromagnetic steel plates, copper plates, stainless steel plates, etc. Can be used.
- the coating agent of the present invention can form a coating film excellent in chemical resistance including acid resistance and alkali resistance, even if the crosslinked coating film has a thickness of about 5 ⁇ m. Moreover, even if the coating agent of this invention is a film thickness of about 1 micrometer, it can form the coating film excellent in chemical resistance including acid resistance, alkali resistance, etc.
- the coating agent of the present invention can be formed on a substrate by coating, drying and curing.
- Examples of the coating method of the coating agent include a spray method, a curtain coater method, a flow coater method, a roll coater method, a brush coating method, and a dipping method.
- the drying may be natural drying at normal temperature, but may be heat-dried. Heat drying is preferably carried out usually at 40 to 250 ° C. for a time of about 1 to 600 seconds.
- the drying temperature of a coating film it is preferable to adjust the drying temperature of a coating film to about 80 degrees C or less.
- the coating film obtained by drying the conventional coating agent at a low temperature of 80 ° C. or lower may not have sufficient solvent resistance.
- the film-forming aid improves the film-forming property of the coating film even when it is dried at a low temperature of 80 ° C. or lower for a few seconds.
- a coating film exhibiting excellent solvent resistance, water resistance and chemical resistance can be formed.
- Example 1 Preparation of aqueous resin composition (I-1) Polyester polyol (1,6-hexanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. And 100 parts by mass of a polyester polyol obtained by reacting adipic acid with a hydroxyl group equivalent of 1000 g / equivalent), and dehydration was carried out at 120 to 130 ° C. at a reduced pressure of 0.095 MPa.
- the sum of the amount of urethane bonds and urea bonds relative to the total amount of urethane resin was 3.0 mmol / g, and an aqueous resin composition (I-1) having a nonvolatile content of 30% by mass was obtained.
- Example 2 Preparation of aqueous resin composition (I-2) Polyester polyol (1,6-hexanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. And 100 parts by mass of a polyester polyol obtained by reacting adipic acid with a hydroxyl group equivalent of 1000 g / equivalent), and dehydration was carried out at 120 to 130 ° C. at a reduced pressure of 0.095 MPa.
- the sum of the urethane bond amount and the urea bond amount relative to the total amount of the urethane resin was 3.0 mmol / g, and an aqueous dispersion of urethane resin having a nonvolatile content of 30% by mass was obtained.
- aqueous resin composition (I-2) comprising an aqueous dispersion of a vinyl composite resin and having a nonvolatile content of 30% by mass was obtained.
- the urethane resin and the vinyl resin did not form a chemical bond.
- Example 3 Preparation of aqueous resin composition (I-3) Polyester polyol (1,6-hexanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. And 100 parts by mass of a polyester polyol obtained by reacting adipic acid with a hydroxyl group equivalent of 1000 g / equivalent), and dehydration was carried out at 120 to 130 ° C. at a reduced pressure of 0.095 MPa.
- the sum of the amount of urethane bonds and urea bonds relative to the total amount of urethane resin was 3.0 mmol / g, and an aqueous resin composition (I-3) having a nonvolatile content of 30% by mass was obtained.
- Example 4 Preparation of aqueous resin composition (I-4) Polyester polyol (1,6-hexanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. And 100 parts by mass of a polyester polyol obtained by reacting adipic acid with a hydroxyl group equivalent of 1000 g / equivalent), and dehydration was carried out at 120 to 130 ° C. at a reduced pressure of 0.095 MPa.
- the sum of the amount of urethane bonds and urea bonds relative to the total amount of urethane resin was 3.0 mmol / g, and an aqueous resin composition (I-4) having a nonvolatile content of 30% by mass was obtained.
- Example 5 Preparation of aqueous resin composition (I-5) Polyester polyol (1,6-hexanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. And 50 parts by weight of a polyester polyol obtained by reacting adipic acid with a hydroxyl group equivalent of 500 g / equivalent), and dehydration was performed at 120 to 130 ° C. at a reduced pressure of 0.095 MPa.
- Example 6 Preparation of aqueous resin composition (I-6) Polyester polyol (1,6-hexanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. And 100 parts by mass of a polyester polyol obtained by reacting adipic acid with a hydroxyl group equivalent of 1000 g / equivalent), and dehydration was carried out at 120 to 130 ° C. at a reduced pressure of 0.095 MPa.
- aqueous resin composition (I-6) having a total urea bond amount of 3.0 mmol / g and a nonvolatile content of 30% by mass was obtained.
- Example 7 Preparation of aqueous resin composition (I-7) Polyester polyol (1,6-hexanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube and a stirrer. And 100 parts by mass of a polyester polyol obtained by reacting adipic acid with a hydroxyl group equivalent of 1000 g / equivalent), and dehydration was carried out at 120 to 130 ° C. at a reduced pressure of 0.095 MPa.
- the sum of the amount of urethane bonds and urea bonds relative to the total amount of urethane resin was 3.0 mmol / g, and an aqueous resin composition (I-7) having a nonvolatile content of 30% by mass was obtained.
- Example 8 Preparation of aqueous resin composition (I-8) Polyester polyol (1,6-hexanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. And 100 parts by mass of a polyester polyol obtained by reacting adipic acid with a hydroxyl group equivalent of 1000 g / equivalent), and dehydration was carried out at 120 to 130 ° C. at a reduced pressure of 0.095 MPa.
- the sum of the amount of urethane bonds and urea bonds relative to the total amount of urethane resin was 3.0 mmol / g, and an aqueous resin composition (I-8) having a nonvolatile content of 30% by mass was obtained.
- Example 9 Preparation of aqueous resin composition (I-9) Polyester polyol (1,4-butanediol and neopentyl glycol) was placed in a nitrogen-substituted container equipped with a thermometer, nitrogen gas inlet tube and stirrer. Polyol obtained by reacting terephthalic acid with adipic acid, 80 parts by mass of hydroxyl group equivalent of 1399 g / equivalent, and polycarbonate polyol obtained by reacting polycarbonate polyol (1,6-hexanediol and diethyl carbonate) (Polyol, hydroxyl group equivalent: 1516 g / equivalent) 43 parts by mass was added, and dehydration was performed at 120 ° C. to 130 ° C. at a reduced pressure of 0.095 MPa.
- the organic solvent solution of the urethane prepolymer was cooled to 50 ° C., reacted with 2 parts by mass of A1100 (aminopropyltriethoxysilane), then added with 47 parts by mass of methyl ethyl ketone, cooled to 50 ° C., and 5 parts by mass of triethylamine.
- A1100 aminopropyltriethoxysilane
- methyl ethyl ketone cooled to 50 ° C.
- triethylamine triethylamine
- aqueous resin composition (I-10) Polypropylene glycol-diglycidyl ether (epoxy equivalent 201 g / equivalent) was added to a four-necked flask equipped with a thermometer, a stirring device, a reflux condenser, and a dropping device. ) After charging 590 parts by mass, the flask was purged with nitrogen. Next, after heating using an oil bath until the temperature in the flask reached 70 ° C., 380 parts by mass of di-n-butylamine was added dropwise over 30 minutes using a dropping device. The reaction was allowed for 10 hours.
- polyester polyol polyester polyol obtained by reacting 1,6-hexanediol, neopentyl glycol and adipic acid, in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas introduction tube, and a stirrer, 50 parts by mass of a hydroxyl group equivalent of 1000 g / equivalent) and 60 parts by mass of a polycarbonate polyol (a polycarbonate polyol obtained by reacting 1,6-hexanediol and diethyl carbonate, a hydroxyl group equivalent of 500 g / equivalent) were added. Dehydration was performed at 120 ° C. to 130 ° C. at 0.095 MPa.
- the organic solvent solution of the urethane prepolymer is cooled to 50 ° C. and reacted with 6 parts by mass of A1100 (aminopropyltriethoxysilane), and then 168 parts by mass of methyl ethyl ketone and 3 parts by mass of ethylenediamine are added and sufficiently stirred and mixed. By doing so, the polyurethane resin was chain-extended.
- the tertiary amino group of the urethane prepolymer is neutralized, and further by adding 533 parts by mass of water and sufficiently stirring, the tertiary amino group is converted to phosphoric acid.
- An aqueous dispersion of a urethane resin having a cationic group formed by neutralization was obtained.
- a urethane resin composition (I-10) having a non-volatile content of 30% by mass was obtained by adding the urethane bond amount and urea bond amount to 2.0 mmol / g.
- aqueous resin composition (I'-1) Polyester polyol (1,6-hexanediol and neopentyl) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. 100 parts by mass of a polyester polyol obtained by reacting glycol and adipic acid (hydroxyl equivalent: 1000 g / equivalent) was added, and dehydration was performed at 120 ° C. to 130 ° C. at a reduced pressure of 0.095 MPa.
- aqueous resin composition (I'-2) Polyester polyol (1,6-hexanediol and neopentyl) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas inlet tube, and a stirrer. 100 parts by mass of a polyester polyol obtained by reacting glycol and adipic acid (hydroxyl equivalent: 1000 g / equivalent) was added, and dehydration was performed at 120 ° C. to 130 ° C. at a reduced pressure of 0.095 MPa.
- aqueous resin composition (I′-3) having a non-volatile content of 30% by mass was 3.0 mmol / g.
- aqueous resin composition (I'-4) Polyester polyol (1,6-hexanediol and neopentyl) was placed in a nitrogen-substituted container equipped with a thermometer, a nitrogen gas introduction tube, and a stirrer. 100 parts by mass of a polyester polyol obtained by reacting glycol and adipic acid (hydroxyl equivalent: 1000 g / equivalent) was added, and dehydration was performed at 120 ° C. to 130 ° C. at a reduced pressure of 0.095 MPa.
- the aqueous resin composition was applied onto a base material made of a polypropylene film using a bar coater so that the film thickness of the dried coating film was 50 ⁇ m, and was dried in an environment of room temperature 23 ° C. and humidity 65% by a casting method. .
- the film forming property after drying for 24 hours was visually evaluated according to the following criteria. The case where no crack was generated was evaluated as “A”, the case where a very small crack was generated was evaluated as “B”, and the case where a clear crack was generated on the entire surface of the coating film was evaluated as “C”.
- amount (% by mass) of film-forming aid represents the mass ratio of the film-forming aid to the total amount of the aqueous resin composition.
- film-forming auxiliary / aqueous medium represents a mass ratio [film-forming auxiliary / aqueous medium (C)] of the film-forming auxiliary and the aqueous medium (C).
- aqueous resin composition of the said Example 1 and 2 very excellent film forming property can be provided to an aqueous resin composition without toxicity, As a result, the coating film excellent in alkali resistance and corrosion resistance is formed. It was possible.
- the aqueous resin composition of Example 3 is different from the embodiment of Examples 1 and 2 in terms of the combination of the film-forming aids, but has no toxicity and can impart very excellent film-forming properties to the aqueous resin composition. As a result, it was possible to form a coating film having excellent alkali resistance and good corrosion resistance.
- the aqueous resin compositions of Examples 4 and 5 differ from the embodiment of Example 1 in terms of the amount of the film-forming aid used in combination, the aqueous resin composition has a certain degree of good film-forming properties without toxicity. As a result, it was possible to form a coating film having good alkali resistance and corrosion resistance.
- N-methyl-2-pyrrolidone used in Comparative Example 1 has excellent film forming properties and can form a coating film excellent in alkali resistance and corrosion resistance, but is harmful to a level that adversely affects the human body and the environment. There was a problem with sex. Although the film-forming aid used in Comparative Examples 2 and 3 does not have the harmful effects of N-methyl-2-pyrrolidone, it is not sufficient in terms of film-forming performance. As a result, the alkali resistance and corrosion resistance are reduced. An excellent coating film could not be formed. Further, the film-forming auxiliary used in Comparative Example 4 is excellent in film-forming property, but is highly harmful like N-methyl-2-pyrrolidone, and the formed coating film is also in terms of alkali resistance and corrosion resistance. It was not enough.
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Abstract
Description
本発明の水性樹脂組成物は、前記造膜助剤と、樹脂(B)と、水性媒体(C)と、必要に応じてその他の添加剤を含有するものである。
を含む金属等を使用することができる。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は500g/当量)50質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,4-ブタンジオールとネオペンチルグリコールとテレフタル酸とアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1399g/当量)80質量部と、ポリカーボネートポリオール(1,6-ヘキサンジオールと炭酸ジエチルとを反応させて得られたポリカーボネートポリオール、水酸基当量は1516g/当量)43質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、撹拌装置、還流冷却管及び滴下装置を備えた4ツ口フラスコに、ポリプロピレングリコール-ジグリシジルエーテル(エポキシ当量201g/当量。)590質量部を仕込んだ後、フラスコ内を窒素置換した。次いで、前記フラスコ内の温度が70℃になるまでオイルバスを用いて加熱した後、滴下装置を使用してジ-n-ブチルアミン380質量部を30分間で滴下し、滴下終了後、90℃で10時間反応させた。反応終了後、赤外分光光度計(FT/IR-460Plus、日本分光株式会社製)を用いて、反応生成物のエポキシ基に起因する842cm-1付近の吸収ピークが消失していることを確認し、3級アミノ基を有するポリオール(X-1)(アミン当量339g/当量、水酸基当量339g/当量。)を調製した。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
温度計、窒素ガス導入管、攪拌器を備えた窒素置換された容器中に、ポリエステルポリオール(1,6-ヘキサンジオールとネオペンチルグリコールとアジピン酸とを反応させて得られたポリエステルポリオール、水酸基当量は1000g/当量)100質量部を加え、減圧度0.095MPaにて120℃~130℃で脱水を行った。
水性樹脂組成物に含有される造膜助剤に関して、欧州規則No.1272/2008(CLP規則)Annex VIのTable3.1にCMR物質(発がん性、変異原性、生殖毒性のある物質)として記載されているか否かを確認し、記載が無いものを「○」、記載が有るものを「×」と評価した。
ポリプロピレンフィルムからなる基材上に水性樹脂組成物を乾燥塗膜の膜厚が50μmとなるようにバーコーターを用いて塗布し、キャスト法により室温23℃、湿度65%の環境下で乾燥させた。24時間乾燥後における造膜性を目視にて次の基準で評価した。クラックが全く発生していなかったものを「A」、ごく僅かに微細なクラックが発生したものを「B」、塗膜全面に明確なクラックが発生していたものを「C」と評価した。
フィルムアプリケーターを用いて、亜鉛メッキ鋼板に製造直後の各種水性樹脂組成物を0.1g/100cm2の塗布量になるようにそれぞれ塗布し、80℃で30秒間乾燥することにより試験片を作製した。次いで、該試験片に5%水酸化ナトリウム水溶液を0.5mL滴下し30分間放置した。放置後、液付着部分の塗膜外観を次の基準で評価した。外観変化無しを「A」、塗膜が黒色変化又は溶解した面積が10%未満を「B」、塗膜が黒色変化又は溶解した面積が10%以上30%未満を「C」、塗膜が黒色変化又は溶解した面積が30%以上を「D」と評価した。
フィルムアプリケーターを用いて、亜鉛メッキ鋼板に製造直後の各種水性樹脂組成物を0.1g/100cm2の塗布量になるようにそれぞれ塗布し、80℃で30秒間乾燥することにより試験片を作製した。次いで、JIS Z2371に記載されている塩水噴霧試験方法に準じて、雰囲気温度35℃で、5質量%の塩化ナトリウム水溶液を試験板に吹き付け、240時間後の白錆発生率を測定し以下の基準で評価した。尚、水性樹脂組成物の未塗工部(端面部、裏面部)はテープシールを行った。白錆発生無しを「A」、白錆発生した面積が塗布面積全体に対して5%未満を「B」、白錆発生した面積が塗布面積全体に対して5%以上20%未満を「C」、白錆発生した面積が塗布面積全体に対して20%以上を「D」と評価した。
Claims (9)
- 1,3-ブタンジオール(A1)及び1,2-ブタンジオール(a2-1)からなる群より選ばれる1種以上を含有することを特徴とする造膜助剤。
- 1,3-ブタンジオール(A1)と、1,2-ブタンジオール(a2-1)、1,3-プロパンジオール(a2-2)及び1,2-プロパンジオール(a2-3)からなる群より選ばれる1種以上のジオール(A2)とを含有する請求項1に記載の造膜助剤。
- 前記1,3-ブタンジオール(A1)と、前記ジオール(A2)との質量比[前記ジオール(A2)/前記1,3-ブタンジオール(A1)]が0.1~3の範囲である請求項2に記載の造膜助剤。
- 請求項1~3のいずれか1項に記載の造膜助剤と、樹脂(B)と、水性媒体(C)とを含有することを特徴とする水性樹脂組成物。
- 前記造膜助剤が、前記水性樹脂組成物の全量に対して1質量%~30質量%の範囲で含まれ、かつ、前記造膜助剤と前記水性媒体(C)との質量割合[造膜助剤/水性媒体(C)]が、0.01~1の範囲である請求項4に記載の水性樹脂組成物。
- 前記樹脂(B)が、ウレタン樹脂(b1)、及び、ウレタン樹脂とビニル樹脂とによって構成される複合樹脂(b2)からなる群より選ばれる1種以上である請求項4に記載の水性樹脂組成物。
- 前記ウレタン樹脂(b1)が、前記ウレタン樹脂(b1)の全量に対してウレタン結合及びウレア結合を合計1.2mmol/g~5mmol/gの範囲で有するものである請求項6に記載の水性樹脂組成物。
- 前記複合樹脂(b2)が、前記複合樹脂(b2)を構成するウレタン樹脂の全量に対してウレタン結合及びウレア結合を合計1.2mmol/g~5mmol/gの範囲で有するものである請求項6に記載の水性樹脂組成物。
- 請求項1~8のいずれか1項に記載の水性樹脂組成物からなる鋼板表面処理剤。
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EP12854990.4A EP2754694A4 (en) | 2011-12-09 | 2012-10-12 | FILMOGENIC AUXILIARY, AQUEOUS RESIN COMPOSITION AND SURFACE TREATMENT AGENT OF A STEEL SHEET CONTAINING THE SAME |
JP2013500275A JP5257804B1 (ja) | 2011-12-09 | 2012-10-12 | 造膜助剤ならびにそれを含有する水性樹脂組成物及び鋼板表面処理剤 |
CN201280060177.XA CN103975017A (zh) | 2011-12-09 | 2012-10-12 | 成膜助剂、含有其的水性树脂组合物及钢板表面处理剂 |
US14/363,716 US20140364552A1 (en) | 2011-12-09 | 2012-10-12 | Aqueous resin composition comprising film-forming aid, and steel sheet surface treatment agent containing the same |
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JP (1) | JP5257804B1 (ja) |
CN (1) | CN103975017A (ja) |
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JP2016503440A (ja) * | 2012-11-02 | 2016-02-04 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | 水性ポリウレタン分散液の、成形体を貼り合わせるための使用 |
JP2022119251A (ja) * | 2021-02-04 | 2022-08-17 | 日信化学工業株式会社 | コーティング組成物、コーティング被膜及び該被膜を有する物品 |
WO2023090237A1 (ja) * | 2021-11-18 | 2023-05-25 | Dic株式会社 | ウレタン樹脂組成物、及び、積層体 |
WO2023120585A1 (ja) * | 2021-12-21 | 2023-06-29 | 東洋紡株式会社 | ポリエステル樹脂水性分散体組成物 |
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JP2016503440A (ja) * | 2012-11-02 | 2016-02-04 | ビーエーエスエフ ソシエタス・ヨーロピアBasf Se | 水性ポリウレタン分散液の、成形体を貼り合わせるための使用 |
JP2022119251A (ja) * | 2021-02-04 | 2022-08-17 | 日信化学工業株式会社 | コーティング組成物、コーティング被膜及び該被膜を有する物品 |
JP7409331B2 (ja) | 2021-02-04 | 2024-01-09 | 日信化学工業株式会社 | コーティング組成物、コーティング被膜及び該被膜を有する物品 |
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JP7505651B2 (ja) | 2021-11-18 | 2024-06-25 | Dic株式会社 | ウレタン樹脂組成物、及び、積層体 |
WO2023120585A1 (ja) * | 2021-12-21 | 2023-06-29 | 東洋紡株式会社 | ポリエステル樹脂水性分散体組成物 |
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JPWO2013084590A1 (ja) | 2015-04-27 |
EP2754694A4 (en) | 2015-05-06 |
CN103975017A (zh) | 2014-08-06 |
US20140364552A1 (en) | 2014-12-11 |
TW201323497A (zh) | 2013-06-16 |
JP5257804B1 (ja) | 2013-08-07 |
EP2754694A1 (en) | 2014-07-16 |
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