WO2022092163A1 - 2液型コーティング組成物 - Google Patents
2液型コーティング組成物 Download PDFInfo
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- WO2022092163A1 WO2022092163A1 PCT/JP2021/039696 JP2021039696W WO2022092163A1 WO 2022092163 A1 WO2022092163 A1 WO 2022092163A1 JP 2021039696 W JP2021039696 W JP 2021039696W WO 2022092163 A1 WO2022092163 A1 WO 2022092163A1
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- polyol
- coating composition
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- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- JMMWKPVZQRWMSS-UHFFFAOYSA-N isopropanol acetate Natural products CC(C)OC(C)=O JMMWKPVZQRWMSS-UHFFFAOYSA-N 0.000 description 1
- 229940011051 isopropyl acetate Drugs 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-N isovaleric acid Chemical compound CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- AYLRODJJLADBOB-QMMMGPOBSA-N methyl (2s)-2,6-diisocyanatohexanoate Chemical compound COC(=O)[C@@H](N=C=O)CCCCN=C=O AYLRODJJLADBOB-QMMMGPOBSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 125000003386 piperidinyl group Chemical group 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 description 1
- QHGNHLZPVBIIPX-UHFFFAOYSA-N tin(ii) oxide Chemical class [Sn]=O QHGNHLZPVBIIPX-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000004034 viscosity adjusting agent Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0838—Manufacture of polymers in the presence of non-reactive compounds
- C08G18/0842—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents
- C08G18/0847—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents in the presence of solvents for the polymers
- C08G18/0852—Manufacture of polymers in the presence of non-reactive compounds in the presence of liquid diluents in the presence of solvents for the polymers the solvents being organic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/227—Catalysts containing metal compounds of antimony, bismuth or arsenic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/24—Catalysts containing metal compounds of tin
- C08G18/244—Catalysts containing metal compounds of tin tin salts of carboxylic acids
- C08G18/246—Catalysts containing metal compounds of tin tin salts of carboxylic acids containing also tin-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3203—Polyhydroxy compounds
- C08G18/3206—Polyhydroxy compounds aliphatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4202—Two or more polyesters of different physical or chemical nature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- 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
- C08G18/4241—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols from dicarboxylic acids and dialcohols in combination with polycarboxylic acids and/or polyhydroxy compounds which are at least trifunctional
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/44—Polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—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
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—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
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1679—Making multilayered or multicoloured articles applying surface layers onto injection-moulded substrates inside the mould cavity, e.g. in-mould coating [IMC]
-
- 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
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3472—Five-membered rings
- C08K5/3475—Five-membered rings condensed with carbocyclic rings
Definitions
- the present invention relates to a two-component coating composition.
- Coating films having various roles are formed on the surface of industrial products and the like.
- the coating film protects the object to be coated and at the same time imparts a beautiful appearance and excellent design.
- the coating film is generally formed by spray-coating a coating composition containing a solvent such as an organic solvent and / or an aqueous solvent, and then drying the coating film.
- a solvent such as an organic solvent and / or an aqueous solvent
- Patent Document 1 As a painting method instead of spray painting, in-mold coating in which painting is performed in a mold has been proposed (for example, Patent Document 1).
- a two-component coating composition containing a main agent and a curing agent.
- the main agent contains a polyol, a curing catalyst and a light stabilizer.
- the curing agent contains an isocyanurate compound and contains.
- the hydroxyl value of the polyol is 300 mgKOH / g or more and 1000 mgKOH / g or less.
- the average number of hydroxyl groups of the polyol is 3 or more
- the content of the curing catalyst is 0.25 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the polyol.
- the light stabilizer contains a hindered amine compound and contains.
- the common logarithm pKb of the base dissociation constant of the hindered amine compound is 6.5 or more and 14 or less.
- a two-component coating composition having a solvent content of 30% by mass or less.
- the ratio of the isocyanate group equivalent of the isocyanate compound to the hydroxyl group equivalent of the polyol: NCO / OH is 0.5 / 1 or more and 2/1 or less, according to any one of [1] to [5] above. Liquid type coating composition.
- the exterior body is a painted body that can be used mainly outdoors.
- the paint for the exterior is a material for a coating film formed on the exterior body.
- the exterior body is required to have strict weather resistance. Therefore, exterior paints are usually blended with light stabilizers and / or UV absorbers.
- light stabilizers and / or UV absorbers In the case of in-mold coating, it was found that the basicity of the light stabilizer greatly affects the physical properties of the coating film. For example, when a highly basic light stabilizer is used, the adhesion of the obtained coating film is lowered, and the water resistance is also greatly lowered.
- HALS hindered amine compound
- HALS having such pKb can be said to be weakly basic to neutral.
- neutral HALS By using this weakly basic to neutral HALS (hereinafter, may be referred to as neutral HALS for convenience), the deterioration of the adhesion of the coating film is suppressed. That is, according to the neutral HALS, the weather resistance can be imparted to the coating film without lowering the water resistance. Therefore, the two-component coating composition according to the present embodiment is for in-mold coating, and is particularly preferably used for exteriors.
- a two-component coating composition may be applied to open press coatings.
- the two-component coating composition according to the present embodiment is interposed between the colored coating film located on the outermost side of the painted article, the clear coating film located on the outermost side of the painted article, and the clear coating film and the object to be coated. It can be used as a material for intermediate coatings and / or basecoats.
- the two-component coating composition contains a main agent and a curing agent.
- the main agent contains a polyol, a curing catalyst and a light stabilizer.
- the curing agent contains an isocyanurate compound.
- the base agent and / or the curing agent may be heated and / or vacuum degassed before mixing, respectively. As a result, the amount of water contained in the two-component coating composition obtained by mixing the two is reduced, and the appearance of the obtained coating film is easily improved.
- the main agent contains a polyol, a curing catalyst and a light stabilizer.
- the polyol is a coating film forming resin.
- the polyol reacts with the curing agent, for example by heating, to form a three-dimensional cured coating.
- curable resins containing a polyol contained in a two-component coating composition may be collectively referred to as a coating film-forming resin.
- the light stabilizer suppresses deterioration of the coating film due to ultraviolet rays.
- the light stabilizer efficiently traps alkyl radicals (R ⁇ ) and peroxy radicals (ROO ⁇ ) generated by ultraviolet rays.
- the main agent used in this embodiment contains a hindered amine compound (HALS) as a light stabilizer.
- HALS hindered amine compound
- HALS has, for example, one or more piperidine skeletons (typically 2,2,6,6-tetraalkylpiperidine skeletons) in the molecule. Such HALS is used alone by one type and in combination of two or more types.
- HALS is generally basic.
- the common logarithm pKb of the base dissociation constant of neutral HALS used in this embodiment is 6.5 or more and 14 or less. This increases the compatibility of HALS with polyols.
- the pKb of neutral HALS is preferably 6.8 or more, more preferably 7.0 or more, and particularly preferably 8 or more.
- the pKb of neutral HALS is preferably 13 or less, and particularly preferably 12 or less.
- the molecular weight of neutral HALS is not particularly limited. Among them, the molecular weight of neutral HALS is preferably 400 or more and 800 or less. This tends to increase the compatibility with the polyol. In addition, elution or bleed-out of neutral HALS from the coating film is likely to be suppressed.
- the molecular weight of neutral HALS is more preferably 410 or more, and even more preferably 420 or more. When the neutral HALS does not have a hydroxyl group in the molecule, the molecular weight of the neutral HALS is more preferably 700 or less, further preferably 600 or less. Neutral HALS having a hydroxyl group has high compatibility with a polyol even if it has a relatively large molecular weight. Therefore, the upper limit of the molecular weight of the neutral HALS having a hydroxyl group may be 790 or 780.
- HALS having a hydroxyl group is also preferable in that elution or bleed-out from the coating film is unlikely to occur.
- HALS with a large molecular weight are generally prone to elution or bleed out from the coating.
- the hydroxyl group of HALS having a hydroxyl group can react with the curing agent, elution or bleed-out from the coating film is likely to be suppressed even if it has a relatively large molecular weight.
- the nitrogen atom (typically, the nitrogen atom of the piperidin skeleton) constituting the hindered amino group of neutral HALS may be bonded to hydrogen (NH type) or to an alkyl group (typically).
- N-R type may have an ether bond (N-OR type), may have a hydroxyl group via an ether bond (N-OR-OH type), and may be bonded to an acyl group. (N-CO-R type).
- the hindered amino group is preferably N-OR type or N-CO-R type in that pKb tends to be large.
- Tinuvin249 (pKb about 8, N-R) Type)
- the main agent may contain other light stabilizers.
- Other light stabilizers include, for example, HALS with a pKb of less than 6.5, HALS with a pKb of greater than 14, and hindered phenolic compounds.
- Examples of the hindered phenolic compound include IRGANOX (registered trademark) 1010 and IRGANOX1098 (both manufactured by BASF).
- the content of the light stabilizer (PHR: mass%) with respect to the resin solid content of the coating composition is preferably 1% by mass or more and less than 5% by mass.
- the PHR of the light stabilizer is more preferably 4% by mass or less, further preferably 3% by mass or less.
- the neutral HALS preferably occupies 50% by mass or more, and preferably 70% by mass or more.
- the resin solid content of the coating composition is the total solid content of the coating film-forming resin and the curing agent. PHR is a ratio to 100% by mass of the resin solid content.
- UV absorber An ultraviolet absorber (UVA) may be used together with the light stabilizer. Thereby, the weather resistance can be further improved.
- UVA include benzotriazole-based compounds, triazine-based compounds, benzophenone-based compounds and benzoate-based compounds.
- Specific examples of UVA include Tinuvin326, Tinuvin384-2, Tinuvin900, Tinuvin400, Tinuvin405, Tinuvin460, Tinuvin477, and Tinuvin479 (all manufactured by BASF).
- the UVA content (PHR: mass%) with respect to 100% by mass of the resin solid content of the coating composition is, for example, 5% by mass or less.
- the PHR of UVA is preferably 4% by mass or less, and may be 0%.
- the polyol is a coating film forming resin.
- the polyol reacts with the curing agent, for example by heating, to form a three-dimensional cured coating.
- Polyols have two or more hydroxyl groups per molecule.
- the main agent contains a polyol having an average of 3 or more hydroxyl groups per molecule. As a result, the hardness of the obtained coating film tends to increase.
- the polyol may be used alone or in combination of two or more.
- the main agent may contain a polyol (A1) having 3 or more hydroxyl groups per molecule and a polyol (A2) having 2 hydroxyl groups per molecule.
- the proportion of the polyol (A2) is not particularly limited.
- the ratio of the polyol (A2) may be 50% by mass or less, 40% by mass or less, and 30% by mass or less of the total of the polyol (A1) and the polyol (A2).
- the hydroxyl value of the polyol is 300 mgKOH / g or more and 1000 mgKOH / g or less.
- the reaction rate between the polyol and the isocyanate compound becomes high when the main agent and the curing agent are mixed. Therefore, the painted product can be quickly released from the mold, and the productivity is improved.
- the adhesion of the coating film to the resin base material tends to be improved.
- the apparent hydroxyl value calculated based on the hydroxyl value and mass ratio of each polyol may be 300 mgKOH / g or more and 1000 mgKOH / g or less. That is, the main agent may contain a polyol having a hydroxyl value of less than 300 mgKOH / g and / or a polyol having a hydroxyl value of more than 1000 mgKOH / g.
- the hydroxyl value of the polyol (including the apparent hydroxyl value; the same applies hereinafter) is preferably 350 mgKOH / g or more, and more preferably 500 mgKOH / g or more.
- the hydroxyl value of the polyol is preferably 800 mgKOH / g or less, more preferably 700 mgKOH / g or less.
- the type of polyol is not particularly limited.
- the polyol include polyester polyols, polyether polyols, polycarbonate polyols, polyacrylate polyols and polyhydric alcohols. These may be used alone or in combination of two or more.
- the polyol preferably contains at least one selected from the group consisting of polyester polyols, polyether polyols and polycarbonate polyols.
- the polyester polyol preferably has a branched structure.
- the polyester polyol having a branched structure is prepared, for example, by reacting a trihydric or higher polyhydric alcohol compound with a 2 or higher polyvalent carboxylic acid and repeating the above reaction as necessary.
- polyester polyols include, for example, Desmophen VPLS2249 / 1 (manufactured by Sumika Cobestrourethane Co., Ltd.), Desmophen 800 (manufactured by Sumika Cobestrourethane Co., Ltd.), and Desmophen XP2488 (manufactured by Sumika Cobestrourethane Co., Ltd.). , Kuraray polyol P-510 (manufactured by Kuraray Co., Ltd.) and Kuraray polyol F-510 (manufactured by Kuraray Co., Ltd.).
- polyether polyol examples include polyethylene glycol, polypropylene glycol, polytetramethylene glycol and blocks thereof.
- Polyether polyols may be prepared by adding ethylene oxide and / or propylene oxide to the polyhydric alcohol compound. By the above procedure, a polyether polyol having a divalent or trivalent or higher number of OH functional groups per molecule can be prepared.
- Examples of commercially available products of the polyether polyol include the Sanniks series manufactured by Sanyo Chemical Industries, Ltd. Specific examples thereof include Sanniks GP-250, Sanniks GP-400, Sanniks PP-200 and Sanniks GP-600.
- Polycarbonate polyol can be prepared, for example, by reacting a polyvalent polyol with dimethyl carbonate.
- Examples of commercially available polycarbonate polyols include Duranol T5650E (manufactured by Asahi Kasei Corporation), C-590 (manufactured by Kuraray Co., Ltd.) and ETERNCOLL PH-50 (manufactured by Ube Kosan Co., Ltd.).
- polyhydric alcohol examples include ethylene glycol, glycerin, trimethylolpropane, propylene glycol, tetramethylene glycol and pentaerythritol.
- the weight average molecular weight (Mw) of the polyol is not particularly limited.
- the Mw of the polyol may be appropriately set according to the hydroxyl value and the like.
- the main agent may contain a polyol having an average number of hydroxyl groups less than 3.
- the main agent may contain a coating film-forming resin other than the polyol.
- the coating film-forming resin include acrylic resin, polyester resin, alkyd resin, polyether resin, polyolefin resin, polyurethane resin, polycarbonate resin, melamine resin, epoxy resin and carbodiimide resin.
- Other coating film forming resins may be used alone or in combination of two or more.
- the curing catalyst promotes the curing reaction.
- the curing catalyst is not particularly limited. From the viewpoint of the accelerating effect, as the curing catalyst, for example, at least one organic metal catalyst containing a metal element selected from the group consisting of Bi, Zn, Al, Zr and Sn is preferable. Among them, at least one organometallic catalyst containing a metal element selected from the group consisting of Bi, Zn, Al and Zr is preferable.
- Examples of the organometallic catalyst containing Bi include bismuth carboxylic acid and a salt thereof.
- Examples of the Zn-containing organometallic catalyst include zinc complex catalysts.
- Examples of the organometallic catalyst containing Al include an aluminum complex catalyst.
- Examples of the organometallic catalyst containing Zr include a zirconium chelate catalyst.
- Examples of the organic metal catalyst containing Sn include dialkyl tin dicarboxylate such as dibutyl tin dilaurate, dioctyl tin dilaurate, and dibutyl tin diacetate; tin oxide compounds such as dibutyl tin oxide; tin carboxylates such as tin 2-ethylhexanoate. ..
- Examples of commercially available organometallic catalysts containing Bi include K-KAT 348 (manufactured by Kusumoto Kasei Co., Ltd.) and K-KAT XK-640 (manufactured by Kusumoto Kasei Co., Ltd.).
- Examples of commercially available products of organometallic catalysts containing Zr include K-KAT 4205, K-KAT XC-9213, K-KAT XC-A209, and K-KAT 6212 (all manufactured by Kusumoto Kasei Co., Ltd.).
- Examples of commercially available products of organometallic catalysts containing Al include K-KAT 5218 (manufactured by Kusumoto Kasei Co., Ltd.).
- organometallic catalysts containing Zn include, for example, K-KAT XK-314, K-KAT XK-635, K-KAT XK-639, K-KAT XK-620 (all manufactured by Kusumoto Kasei Co., Ltd.). Can be mentioned.
- organometallic catalysts containing Sn include TVSTINLAU (manufactured by Nitto Kasei Co., Ltd.).
- the content of the curing catalyst is, for example, 0.25 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the coating film forming resin. As a result, the curing reaction of the coating film-forming resin proceeds rapidly. Therefore, a coating film having excellent appearance and physical characteristics can be obtained by forming a layer by in-mold coating.
- the content of the curing catalyst is more preferably 0.5 parts by mass or more with respect to 100 parts by mass of the coating film forming resin.
- the content of the curing catalyst is more preferably 7 parts by mass or less with respect to 100 parts by mass of the coating film forming resin.
- the curing agent crosslinks the coating film-forming resin such as polyol, and the corrosion resistance and durability of the obtained coating film are improved.
- the curing agent contains an isocyanurate compound.
- the isocyanurate compound is a trimer of an isocyanate compound and has a ring structure.
- the isocyanate compound is not particularly limited, and a known curing agent for a two-component reaction type composition is used.
- examples of the isocyanate compound include tolylene diisocyanate (TDI), 4,4'-diphenylmethane diisocyanate (MDI), and the like.
- Aromatic diisocyanates such as xylylene diisocyanate (XDI) and metaxylylene diisocyanate (MXDI); hexamethylene diisocyanate (HDI), tetramethylene diisocyanate, 2-methyl-pentane-1,5-diisocyanate, 3-methyl-pentane-1 , 5-Diisocyanate, lysine diisocyanate, trioxyethylene diisocyanate and other aliphatic diisocyanates; isophorone diisocyanate (IPDI), cyclohexyl diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, norbornan diisocyanate, hydrogenated tolylene diisocyanate, hydrogenated xylene diisocyanate, Examples thereof include alicyclic diisocyanates such as hydrogenated tetramethylxylene diisocyanate. These may be used alone or in combination of two or more
- aliphatic diisocyanates are preferable, and HDI is more preferable because the viscosity is relatively low.
- isocyanate trimers are particularly reactive with polyols. Therefore, it is more preferably used as a coating layer forming method by in-mold coating.
- Ratio of isocyanate group equivalent of isocyanate compound to hydroxyl group equivalent of polyol: NCO equivalent / OH equivalent is preferably 0.5 / 1.0 or more and 2.0 / 1.0 or less, and 0.9 / 1.0 or more 1 .2 / 1.0 or less is more preferable.
- the equivalent ratio is within the above range, the curability is high, and it is particularly preferably used for forming a coating layer by in-mold coating.
- the curing agent may contain a curing agent other than the isocyanurate compound.
- examples of other curing agents include amino resins, the monomer or dimer of the isocyanate compound, the biuret of the isocyanate compound, the blocked product of the isocyanate compound, the epoxy compound, the aziridine compound, the carbodiimide compound, and the oxazoline compound. .. These may be used alone or in combination of two or more.
- the content of the curing agent is, for example, 35% by mass or more and 90% by mass or less of the resin solid content of the coating composition.
- the content of the curing agent is preferably 45% by mass or more, more preferably 55% by mass or more.
- the content of the curing agent is preferably 85% by mass or less, more preferably 70% by mass or less.
- the content of the solvent contained in the coating composition is 30% by mass or less. As a result, a cured coating film can be obtained quickly. Therefore, a coating film having excellent appearance and physical characteristics can be obtained by forming a layer by in-mold coating.
- the content of the solvent is preferably 10% by mass or less, and may be 0%.
- the solvent is not particularly limited.
- the solvent is usually an organic solvent.
- the organic solvent include ester solvents such as ethyl acetate, butyl acetate, isopropyl acetate, ethylene glycol monoethyl ether acetate, propylene glycol monomethyl ether acetate, and propylene glycol monoethyl ether acetate; propylene glycol monomethyl ether and ethylene glycol monomethyl ether.
- the main agent may contain a pigment.
- the pigment include a coloring pigment, a bright pigment and an extender pigment.
- the content of the pigment is not particularly limited. The content of the pigment may be appropriately set according to the type, purpose and the like.
- the glittering pigment is, for example, coated with a metal piece (aluminum, chromium, gold, silver, copper, brass, titanium, nickel, nickel chromium, stainless steel, etc.), a metal oxide piece, a pearl pigment, a metal or a metal oxide. Glass flakes, silica flakes coated with metal oxides, graphite, hologram pigments and cholesteric liquid crystal polymers. These may be used alone or in combination of two or more.
- coloring pigment examples include azochelate pigments, insoluble azo pigments, condensed azo pigments, diketopyrrolopyrrole pigments, benzimidazolone pigments, phthalocyanine pigments, indigo pigments, perinone pigments, perylene pigments, and dioxane.
- Organic coloring pigments such as based pigments, quinacridone based pigments, isoindolinone based pigments and metal complex pigments: Inorganic coloring pigments such as yellow lead, yellow iron oxide, red iron oxide, carbon black and titanium dioxide can be mentioned. These may be used alone or in combination of two or more.
- extender pigment examples include calcium carbonate, barium sulfate, clay and talc. These may be used alone or in combination of two or more.
- the two-component coating composition may contain other components as needed.
- Other ingredients include, for example, additives commonly used in the coating and paint fields. Specific examples thereof include various pigments, surface modifiers, viscosity modifiers, antioxidants, ultraviolet inhibitors, defoamers, catalyst aids, rust inhibitors, sedimentation inhibitors, dispersants and the like. These additives may be added to the main agent or the curing agent. The amount of the additive is not particularly limited and can be appropriately set as needed.
- In-mold coating is a method of forming a coating layer in a mold.
- the coated body is a step of injecting the above-mentioned two-component coating composition between the surface of the object to be coated and the cavity surface and / or the core surface of the mold, and the injected two-component type.
- Manufactured by a method comprising a step of curing the coating composition. The curing step may be performed in the mold.
- the coating layer is formed in the mold, it is possible to prevent dust and the like from adhering between the object to be coated and the coating layer and dust and the like from being mixed inside the coating layer. Will be done.
- the pattern of the mold can be transferred to the coating layer with high accuracy.
- the amount of the solvent contained in the coating composition is small, a drying step for removing the solvent is not required, and the productivity is improved. Furthermore, it is possible to form a thick coating layer in which sagging and armpits are suppressed.
- the resin object to be coated may also be molded in the same mold.
- the coated body is formed between the step of molding the resin-made object to be coated in the mold, the surface of the obtained object to be coated, and the cavity surface and / or the core surface of the mold. It is produced by a method comprising a step of injecting a liquid coating composition and a step of curing the injected two-component coating composition. The curing step may be performed in the mold.
- the viscosity of the two-component coating composition when injected into the mold is preferably 100 mPa ⁇ s or more and 500 mPa ⁇ s or less. If necessary, the main agent and / or the curing agent of the two-component coating composition may be heated to adjust the viscosity.
- the resin object to be coated may be a thermoplastic resin or a thermosetting resin.
- the resin constituting the object to be coated made of the resin include polypropylene (PP) resin, acrylonitrile / butadiene / styrene copolymer (ABS resin), polycarbonate (PC) / ABS resin, and PC / acrylonitrile / ethylene-propylene-.
- AES resin Diene-styrene copolymer
- AES resin PC / polybutylene terephthalate (PBT) resin, PC / polyethylene terephthalate (PET) resin, PC resin, polymethylmethacrylate (PMMA) resin, GF-PBT resin, GF -Polyforme (PA) resin, noryl / GTX resin, polyvinyl chloride (PVC resin), acrylonitrile / styrene / acrylic (ASA) resin, carbon fiber reinforced plastic (CFRP resin), glass fiber reinforced plastic (GFRP resin) can be mentioned. ..
- the coating layer formed by the above two-component coating composition has excellent weather resistance and water resistance. Therefore, the obtained painted body is suitably used for, for example, an automobile exterior body and a building application.
- curing catalyst K
- the amount of HALS and each UVA is described as a ratio (PHR) to 100% by mass of the resin solid content (polyforme and curing agent).
- PHR ratio
- 218 parts of an isocyanurate compound (Death Module N3600, manufactured by Sumika Cobestro Urethane Co., Ltd., Nurate form of HDI) was prepared as a curing agent.
- NCO / OH 1.0 / 1.0
- the solvent content as a two-component coating composition was 0%.
- Examples 2 to 19 and Comparative Examples 1 to 11 The main agent and the curing agent were prepared by the same procedure as in Example 1 except that the type and amount of each component were changed as described in Tables 1 to 3.
- ethyl acetate which is an organic solvent, was mixed with the main agent.
- Tables 1 to 3 show the amount of solvent as a ratio to the two-component coating composition.
- TVS TIN LAU Organometallic catalyst containing Sn, manufactured by Nitto Kasei Co., Ltd.
- Coating workability A curing agent was added to the prepared main agent. After the addition of the curing agent, the mixture was mixed for 15 seconds and the sample was taken out. The time for taking out the sample was set to 0 seconds for starting the coating work time, and the taken out sample was stirred with a spatula. The time required for the sample to reach a state where it did not drop immediately after the fluidity was lost due to the curing reaction of the main agent and the curing agent was measured as the coating work time and evaluated according to the following criteria.
- a test plate for evaluation was prepared.
- the main agent and the curing agent of the obtained two-component coating composition were mixed.
- the ABS plate was placed in a mold (mold inner area: 100 cm 2 ), and the coating composition was injected.
- the mold was then heated at 80 ° C. for 5 minutes. In this way, a test plate having an ABS plate and a coating layer having a thickness of 150 ⁇ m formed on the surface thereof was obtained.
- the evaluation test plate was left at 23 ° C for 72 hours, and then heated at 80 ° C for 20 minutes. The appearance of the obtained test plate was visually evaluated according to the following criteria.
- Gloss retention rate is 80% or more Possible: Gloss retention rate is 60% or more and less than 80% Defective: Gloss retention rate is less than 60%
- the test plate obtained in the same manner as above was immersed in a water tank maintained at 40 ° C. for 240 hours. Then, the test plate was withdrawn from water and dried at room temperature for 1 hour. Next, 10 vertical and horizontal cuts were made in the coating film of the test plate at intervals of 1 mm by a cutter, and cellophane tape (registered trademark) (manufactured by Nichiban Co., Ltd.) was attached onto the cuts and then peeled off. Of the 100 squares, the number of squares in which the coating film remained was counted. The more squares the coating film remains, the better the adhesion after the water resistance test and the higher the water resistance. The number of counted squares was evaluated according to the following criteria.
- the two-component coating composition of the present invention can be suitably used in a coating method different from conventional spray coating, such as a coating layer forming method by in-mold coating. According to the two-component coating composition of the present invention, a coating film having excellent weather resistance and water resistance can be obtained, and therefore, it is particularly preferably used for exterior use.
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Abstract
Description
[1]
主剤および硬化剤を含む2液型コーティング組成物であって、
前記主剤は、ポリオール、硬化触媒および光安定剤を含み、
前記硬化剤は、イソシアヌレート化合物を含み、
前記ポリオールの水酸基価は、300mgKOH/g以上1000mgKOH/g以下であり、
前記ポリオールの平均水酸基数は、3以上であり、
前記硬化触媒の含有量は、前記ポリオール100質量部に対して0.25質量部以上10質量部以下であり、
前記光安定剤は、ヒンダードアミン系化合物を含み、
前記ヒンダードアミン系化合物の塩基解離定数の常用対数pKbは、6.5以上14以下であり、
溶媒の含有量は、30質量%以下である、2液型コーティング組成物。
前記ヒンダードアミン系化合物の分子量は、400以上800以下である、上記[1]に記載の2液型コーティング組成物。
前記イソシアヌレート化合物は、ヘキサメチレンジイソシアネートの三量体を含む、上記[1]または[2]に記載の2液型コーティング組成物。
前記主剤は、さらに、紫外線吸収剤を含む、上記[1]~[3]のいずれかに記載の2液型コーティング組成物。
前記ポリオールは、ポリエステルポリオール、ポリエーテルポリオールおよびポリカーボネートポリオールよりなる群から選択される少なくとも1種である、上記[1]~[4]のいずれかに記載の2液型コーティング組成物。
前記イソシアネート化合物のイソシアネート基当量と前記ポリオールの水酸基当量との比:NCO/OHは、0.5/1以上2/1以下である、上記[1]~[5]のいずれかに記載の2液型コーティング組成物。
前記硬化触媒は、Bi、Zn、Al、ZrおよびSnよりなる群から選択される金属元素を含む有機金属触媒を少なくとも1種含む、上記[1]~[6]のいずれかに記載の2液型コーティング組成物。
外装用であり、かつ、インモールドコーティング用である、上記[1]~[7]のいずれかに記載の2液型コーティング組成物。
本実施形態に係る2液型コーティング組成物は、主剤および硬化剤を含む。主剤は、ポリオールと硬化触媒と光安定剤とを含む。硬化剤は、イソシアヌレート化合物を含む。主剤および硬化剤を混合することにより、ポリオールとイソシアヌレート化合物とが反応して、硬化塗膜が得られる。主剤および/または硬化剤はそれぞれ、混合前に加温および/または真空脱気されてもよい。これにより、両者を混合して得られる2液型コーティング組成物に含まれる水分量が少なくなって、得られる塗膜の外観が向上し易くなる。
主剤は、ポリオール、硬化触媒および光安定剤を含む。ポリオールは、塗膜形成樹脂である。ポリオールは、例えば加熱によって硬化剤と反応して、三次元の硬化塗膜を形成する。以下、2液型コーティング組成物に含まれるポリオールを含む硬化性の樹脂を、塗膜形成樹脂と総称する場合がある。
〈光安定剤〉
光安定剤は、塗膜の紫外線による劣化を抑制する。光安定剤は、紫外線によって生じるアルキルラジカル(R・)やパーオキシラジカル(ROO・)を効率よくトラップする。本実施形態で用いられる主剤は、光安定剤として、ヒンダードアミン系化合物(HALS)を含む。
光安定剤とともに、紫外線吸収剤(UVA)を用いてもよい。これにより、耐候性をさらに向上することができる。UVAとしては、例えば、ベンゾトリアゾール系化合物、トリアジン系化合物、ベンゾフェノン系化合物およびベンゾエート系化合物が挙げられる。UVAとしては、具体的には、Tinuvin326、Tinuvin384-2、Tinuvin900、Tinuvin400、Tinuvin405、Tinuvin460、Tinuvin477、Tinuvin479(いずれもBASF社製)が挙げられる。
ポリオールは、塗膜形成樹脂である。ポリオールは、例えば加熱によって硬化剤と反応して、三次元の硬化塗膜を形成する。ポリオールは、1分子あたり水酸基を2またはそれ以上有する。本実施形態において、主剤は、1分子あたり平均3以上の水酸基を有するポリオールを含む。これにより、得られる塗膜の硬度が高くなり易い。ポリオールは、1種を単独で、あるいは2種以上を組み合わせて用いられる。
硬化触媒は、硬化反応を促進する。硬化触媒は特に限定されない。促進効果の観点から、硬化触媒としては、例えば、Bi、Zn、Al、ZrおよびSnよりなる群から選択される金属元素を含む有機金属触媒の少なくとも1種が好ましい。なかでも、Bi、Zn、AlおよびZrよりなる群から選択される金属元素を含む有機金属触媒の少なくとも1種が好ましい。
硬化剤により、ポリオール等の塗膜形成樹脂が架橋されて、得られる塗膜の耐食性および耐久性が向上する。
塗料組成物に含まれる溶媒の含有量は、30質量%以下である。これにより、速やかに硬化塗膜が得られる。よって、インモールドコーティングによる層形成により、外観および物性に優れた塗膜が得られる。溶媒の含有量は、10質量%以下が好ましく、0%であってよい。
主剤は、顔料を含んでよい。顔料としては、例えば、着色顔料、光輝性顔料および体質顔料が挙げられる。顔料の含有量は特に限定されない。顔料の含有量は、その種類や目的等に応じて、適宜設定すればよい。
2液型コーティング組成物は、必要に応じて他の成分を含んでもよい。他の成分としては、例えば、コーティング分野および塗料分野において通常用いることができる添加剤が挙げられる。具体的には、各種顔料、表面調整剤、粘性調整剤、酸化防止剤、紫外線防止剤、消泡剤、触媒助剤、防錆剤、沈降防止剤、分散剤等が挙げられる。 これらの添加剤は、主剤に添加されてもよいし、硬化剤に添加されてもよい。添加剤の量は特に限定されず、必要に応じて適宜設定できる。
インモールドコーティングは、金型内でコーティング層を形成する方法である。インモールドコーティングにおいて、塗装体は、被塗物の表面と、金型のキャビティ表面および/またはコア表面との間に、上記2液型コーティング組成物を注入する工程と、注入された2液型コーティング組成物を硬化する工程と、を備える方法により製造される。硬化工程は、金型内で行われてもよい。
ポリオール(サンニックス GP-250、三洋化成工業株式会社製、水酸基価670mgKOH/g、平均水酸基数3)100部、HALS(HOSTAVIN3058、クラリアントケミカルズ株式会社製、pKb=11.4、分子量449、N-CO-R型)、硬化触媒(K-KAT XK-640、楠本化成株式会社製、Biを含む有機金属触媒)3部(有効成分量)、UVA(Tinuvin384-2、BASF社製、ベンゾトリアゾール系化合物)、UVA(Tinuvin400、BASF社製、トリアジン系化合物)を混合して、主剤を調製した。表中、HALSおよび各UVAの量は、樹脂固形分(ポリオールおよび硬化剤)100質量%に対する割合(PHR)として記載されている。
別途、硬化剤として、イソシアヌレート化合物(デスモジュールN3600、住化コベストロウレタン株式会社製、HDIのヌレート体)218部を準備した。
NCO/OH=1.0/1.0であり、2液型コーティング組成物としての溶媒含有量は0%であった。
各成分の種類および量を、表1~表3に記載の通りに変更したこと以外は、実施例1と同様の手順により、主剤および硬化剤を調製した。
なお、実施例13~15および比較例9においては、有機溶媒である酢酸エチルを主剤に混合した。表1~表3には、溶媒量を、2液型コーティング組成物に対する割合として記載している。
(ポリオール)
サンニックスGP-250:三洋化成工業株式会社製、ポリエーテルポリオール、水酸基価670mgKOH/g、平均水酸基数3
サンニックスGP-400:三洋化成工業株式会社製、ポリエーテルポリオール、水酸基価400mgKOH/g、平均水酸基数3
サンニックス GP-600:三洋化成工業株式会社製、ポリエーテルポリオール、水酸基価280mgKOH/g、平均水酸基数3
デスモフェンVPLS2249/1:住化コベストロウレタン株式会社製、ポリエステルポリオール、水酸基価512mgKOH/g、平均水酸基数3以上
デスモフェンXP2488:住化コベストロウレタン株式会社製、ポリエステルポリオール、水酸基価528mgKOH/g、平均水酸基数3以上
サンニックス PP-200:三洋化成工業株式会社製、ポリエーテルポリオール、水酸基価560mgKOH/g、平均水酸基数2
サンニックス PP-600:三洋化成工業株式会社製、ポリエーテルポリオール、水酸基価187mgKOH/g、平均水酸基数2
デュラノールT5650E:旭化成株式会社製、ポリカーボネートポリオール、水酸基価225mgKOH/g、平均水酸基数2
Tinuvin292:BASF社製、pKb=5.1、分子量509,370、N-R型
HOSTAVIN3050:クラリアントケミカルズ株式会社製、pKb=6.1、分子量616.2、N-H型
Tinuvin152:BASF社製、pKb=7.0、9.4、分子量757、N-OR型
TVS TIN LAU:日東化成株式会社製、Snを含む有機金属触媒
デュラネート24A-100:旭化成株式会社製、HDIのビウレット体
デスモジュールN3400:住化コベストロウレタン株式会社製、HDIのダイマー
調製された主剤に硬化剤を添加した。硬化剤の添加後、15秒間混合して、サンプルを取り出した。サンプルを取り出した時間を、塗工作業時間スタート:0秒とし、取り出したサンプルをスパチュラで攪拌した。主剤および硬化剤の硬化反応により流動性がなくなり、サンプルが直ちに落下しない状態に達するまでに要した時間を、塗工作業時間として測定し、下記基準により評価した。
良:塗工作業時間が10秒以上60秒未満
可:塗工作業時間が60秒以上180秒未満
不良:塗工作業時間が10秒未満、または、180秒以上
まず、評価用の試験板を作製した。
得られた2液型コーティング組成物の主剤および硬化剤を混合した。ABS板を金型内(金型内面積:100cm2)に配置し、コーティング組成物を注入した。次いで、金型を、80℃で5分間加熱した。このようにして、ABS板と、その表面に形成された厚さ150μmのコーティング層と、を有する試験板を得た。
良:粒状物発生、泡の巻き込み、巣穴(空気がたまりやすい穴)の発生のいずれも認められない
可:泡の巻き込みが若干認められる
不良:粒状物発生、泡の巻き込み、巣穴(空気がたまりやすい穴)の発生のうち、1またはそれ以上が明確に認められる
上記と同様にして得られた試験板に対し、サンシャインウェザオメーターS80(サンシャインカーボンアーク式促進耐候試験機、スガ試験機社製)を用いて、JIS B 7753に準拠して、800時間の促進耐候性試験を行った。試験前後の塗膜の60°光沢値を光沢計GN-268Plus(コニカミノルタ社製)により測定し、以下の式を用いて光沢保持率を算出した。算出された光沢保持率を、以下の基準に従って評価した。
光沢保持率=100×{(試験前の60°光沢値)-(試験後の60°光沢値)}/(試験前の60°光沢値)
良:光沢保持率が80%以上
可:光沢保持率が60%以上80%未満
不良:光沢保持率が60%未満
上記と同様にして得られた試験板を、40℃に保持された水槽に240時間浸漬した。その後、試験板を水から引き揚げて、常温で1時間乾燥した。次いで、試験板の塗膜に、カッターにより1mmの間隔で縦横10本ずつの切れ目を入れ、その上にセロテープ(登録商標)(ニチバン社製)を貼付した後、はがした。100個のマス目のうち、塗膜が残存しているマス目の数をカウントした。塗膜が残存しているマス目が多いほど、耐水試験後の付着性に優れており、耐水性が高い。カウントされたマス目の数を、以下の基準に従って評価した。
良:カウントされたマス目の数が81個以上
可:カウントされたマス目の数が60個以上80個以下
不良:カウントされたマス目の数が59個以下
Claims (8)
- 主剤および硬化剤を含む2液型コーティング組成物であって、
前記主剤は、ポリオール、硬化触媒および光安定剤を含み、
前記硬化剤は、イソシアヌレート化合物を含み、
前記ポリオールの水酸基価は、300mgKOH/g以上1000mgKOH/g以下であり、
前記ポリオールの平均水酸基数は、3以上であり、
前記硬化触媒の含有量は、前記ポリオール100質量部に対して0.25質量部以上10質量部以下であり、
前記光安定剤は、ヒンダードアミン系化合物を含み、
前記ヒンダードアミン系化合物の塩基解離定数の常用対数pKbは、6.5以上14以下であり、
溶媒の含有量は、30質量%以下である、2液型コーティング組成物。 - 前記ヒンダードアミン系化合物の分子量は、400以上800以下である、請求項1に記載の2液型コーティング組成物。
- 前記イソシアヌレート化合物は、ヘキサメチレンジイソシアネートの三量体を含む、請求項1または2に記載の2液型コーティング組成物。
- 前記主剤は、さらに、紫外線吸収剤を含む、請求項1~3のいずれか一項に記載の2液型コーティング組成物。
- 前記ポリオールは、ポリエステルポリオール、ポリエーテルポリオールおよびポリカーボネートポリオールよりなる群から選択される少なくとも1種である、請求項1~4のいずれか一項に記載の2液型コーティング組成物。
- 前記イソシアネート化合物のイソシアネート基当量と前記ポリオールの水酸基当量との比:NCO/OHは、0.5/1以上2/1以下である、請求項1~5のいずれか一項に記載の2液型コーティング組成物。
- 前記硬化触媒は、Bi、Zn、Al、ZrおよびSnよりなる群から選択される金属元素を含む有機金属触媒を少なくとも1種含む、請求項1~6のいずれか一項に記載の2液型コーティング組成物。
- 外装用であり、かつ、インモールドコーティング用である、請求項1~7のいずれか一項に記載の2液型コーティング組成物。
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