WO2022014137A1 - 光輝性顔料分散体及び複層塗膜形成方法 - Google Patents
光輝性顔料分散体及び複層塗膜形成方法 Download PDFInfo
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- WO2022014137A1 WO2022014137A1 PCT/JP2021/018557 JP2021018557W WO2022014137A1 WO 2022014137 A1 WO2022014137 A1 WO 2022014137A1 JP 2021018557 W JP2021018557 W JP 2021018557W WO 2022014137 A1 WO2022014137 A1 WO 2022014137A1
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- coating film
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- AEXITZJSLGALNH-UHFFFAOYSA-N n'-hydroxyethanimidamide Chemical compound CC(N)=NO AEXITZJSLGALNH-UHFFFAOYSA-N 0.000 description 1
- IONSZLINWCGRRI-UHFFFAOYSA-N n'-hydroxymethanimidamide Chemical compound NC=NO IONSZLINWCGRRI-UHFFFAOYSA-N 0.000 description 1
- ZIUHHBKFKCYYJD-UHFFFAOYSA-N n,n'-methylenebisacrylamide Chemical compound C=CC(=O)NCNC(=O)C=C ZIUHHBKFKCYYJD-UHFFFAOYSA-N 0.000 description 1
- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- DNYZBFWKVMKMRM-UHFFFAOYSA-N n-benzhydrylidenehydroxylamine Chemical compound C=1C=CC=CC=1C(=NO)C1=CC=CC=C1 DNYZBFWKVMKMRM-UHFFFAOYSA-N 0.000 description 1
- VSHTWPWTCXQLQN-UHFFFAOYSA-N n-butylaniline Chemical compound CCCCNC1=CC=CC=C1 VSHTWPWTCXQLQN-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 229910000273 nontronite Inorganic materials 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- HXSACZWWBYWLIS-UHFFFAOYSA-N oxadiazine-4,5,6-trione Chemical compound O=C1ON=NC(=O)C1=O HXSACZWWBYWLIS-UHFFFAOYSA-N 0.000 description 1
- 239000010893 paper waste Substances 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
- 229940083254 peripheral vasodilators imidazoline derivative Drugs 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 229910052628 phlogopite Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001184 polypeptide Polymers 0.000 description 1
- 229920006389 polyphenyl polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 description 1
- 229940099427 potassium bisulfite Drugs 0.000 description 1
- 235000010259 potassium hydrogen sulphite Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 102000004196 processed proteins & peptides Human genes 0.000 description 1
- 108090000765 processed proteins & peptides Proteins 0.000 description 1
- 150000003217 pyrazoles Chemical class 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910000275 saponite Inorganic materials 0.000 description 1
- 125000005372 silanol group Chemical group 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910021647 smectite Inorganic materials 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 1
- RPACBEVZENYWOL-XFULWGLBSA-M sodium;(2r)-2-[6-(4-chlorophenoxy)hexyl]oxirane-2-carboxylate Chemical compound [Na+].C=1C=C(Cl)C=CC=1OCCCCCC[C@]1(C(=O)[O-])CO1 RPACBEVZENYWOL-XFULWGLBSA-M 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000001384 succinic acid Substances 0.000 description 1
- IIACRCGMVDHOTQ-UHFFFAOYSA-M sulfamate Chemical compound NS([O-])(=O)=O IIACRCGMVDHOTQ-UHFFFAOYSA-M 0.000 description 1
- 125000000446 sulfanediyl group Chemical group *S* 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- WMXCDAVJEZZYLT-UHFFFAOYSA-N tert-butylthiol Chemical compound CC(C)(C)S WMXCDAVJEZZYLT-UHFFFAOYSA-N 0.000 description 1
- TUNFSRHWOTWDNC-HKGQFRNVSA-N tetradecanoic acid Chemical compound CCCCCCCCCCCCC[14C](O)=O TUNFSRHWOTWDNC-HKGQFRNVSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- FOETTWZZVDEKIW-UHFFFAOYSA-N triisocyanatomethylbenzene Chemical compound O=C=NC(N=C=O)(N=C=O)C1=CC=CC=C1 FOETTWZZVDEKIW-UHFFFAOYSA-N 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- AVWRKZWQTYIKIY-UHFFFAOYSA-N urea-1-carboxylic acid Chemical compound NC(=O)NC(O)=O AVWRKZWQTYIKIY-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000005418 vegetable material Substances 0.000 description 1
- 239000010455 vermiculite Substances 0.000 description 1
- 229910052902 vermiculite Inorganic materials 0.000 description 1
- 235000019354 vermiculite Nutrition 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
- B05D5/065—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones
- B05D5/066—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects having colour interferences or colour shifts or opalescent looking, flip-flop, two tones achieved by multilayers
-
- 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/57—Three layers or more the last layer being a clear coat
- B05D7/577—Three layers or more the last layer being a clear coat some layers being coated "wet-on-wet", the others not
-
- 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
- C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
- C09D101/02—Cellulose; Modified cellulose
-
- 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
- C09D101/00—Coating compositions based on cellulose, modified cellulose, or cellulose derivatives
- C09D101/08—Cellulose derivatives
- C09D101/16—Esters of inorganic acids
-
- 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
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/001—Pigment pastes, e.g. for mixing in paints in aqueous medium
-
- 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
- C09D17/00—Pigment pastes, e.g. for mixing in paints
- C09D17/004—Pigment pastes, e.g. for mixing in paints containing an inorganic pigment
- C09D17/006—Metal
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/36—Pearl essence, e.g. coatings containing platelet-like pigments for pearl lustre
-
- 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
- C09D7/65—Additives macromolecular
-
- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2350/00—Pretreatment of the substrate
- B05D2350/10—Phosphatation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2401/00—Form of the coating product, e.g. solution, water dispersion, powders or the like
- B05D2401/20—Aqueous dispersion or solution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2508/00—Polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2601/00—Inorganic fillers
- B05D2601/02—Inorganic fillers used for pigmentation effect, e.g. metallic effect
- B05D2601/08—Aluminium flakes or platelets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2602/00—Organic fillers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/10—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by other chemical means
- B05D3/102—Pretreatment of metallic substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- 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
- C08K7/00—Use of ingredients characterised by shape
Definitions
- the present invention relates to a bright pigment dispersion and a method for forming a multi-layer coating film.
- the purpose of painting the paint is mainly to protect the material and give it an aesthetic appearance.
- aesthetics, especially "texture” is important from the viewpoint of enhancing the product power.
- Consumers demand various textures of industrial products, but in recent years, in the fields of automobile outer panels, automobile parts, etc., metal and pearl-like luster are required (hereinafter, metal-like luster).
- metal-like luster The combination of the feeling and the pearly luster is referred to as "metal or pearly luster").
- Metallic or pearly luster does not have a grainy surface like a mirror surface, and when the coated plate is viewed near the specularly reflected light (highlight), it shines brightly, and the comparison of the reflected light intensity away from the specularly reflected light. When viewed in a small area (shade), it looks dark, that is, the texture is characterized by a large difference in brightness between the highlight area and the shade area.
- Patent Document 1 Techniques for imparting such metal or pearly luster to the surface of industrial products include metal plating treatment and metal vapor deposition treatment (for example, Patent Document 1), but it is convenient if metal or pearly luster can be imparted by paint. It is advantageous from the viewpoint of cost and the like, and further, if the paint is water-based, it is still advantageous from the viewpoint of environmental load.
- Patent Document 2 includes a brilliant pigment obtained by crushing a vapor-deposited metal film into metal pieces and an aqueous cellulose derivative having an acid value of 20 to 150 mgKOH / g (solid content), and the main binder is the aqueous cellulose derivative.
- a water-based base coating composition is disclosed, which comprises a resin and the content of the brilliant pigment is 20 to 70% by mass in PWC.
- the coating film formed by the paint described in Patent Document 2 has insufficient metallic or pearly luster.
- Patent Document 3 describes a brilliant pigment dispersion containing water, a scaly aluminum pigment and a cellulose-based viscosity modifier, and has a solid content based on 100 parts by mass of all the components of the brilliant pigment dispersion.
- the viscosity measured with a B-type viscometer is in the range of 400 to 10000 mPa ⁇ sec under the condition of 6 rotations / minute, and the scales in the total solid content.
- Disclosed is a brilliant pigment dispersion containing 30 to 200 parts by mass of a scaly aluminum pigment as a solid content with respect to 100 parts by mass of the total amount of components other than the aluminum pigment.
- An object of the present invention is to provide a bright pigment dispersion capable of forming a coating film having excellent metallic or pearly luster and having stability with respect to shear.
- the present invention includes the subjects described in the following sections.
- a bright pigment dispersion containing (A) a wetting agent, (B) a scaly bright pigment, (C) a sulfonic acid-modified cellulose nanofiber, and (D) water.
- Item 2. The bright pigment dispersion according to Item 1, wherein the content of the wetting agent (A) is in the range of 2 to 30 parts by mass with reference to 100 parts by mass of the solid content in the bright pigment dispersion.
- Item 3 The brilliance according to Item 1 or 2, wherein the content of the scaly brilliant pigment (B) is in the range of 5 to 85 parts by mass with reference to 100 parts by mass of the solid content in the brilliant pigment dispersion. Pigment dispersion.
- Item 4 Any one of Items 1 to 3 in which the content of the sulfonic acid-modified cellulose nanofiber (C) is in the range of 2 to 60 parts by mass with reference to 100 parts by mass of the solid content in the bright pigment dispersion.
- Item 5 The bright pigment dispersion according to any one of Items 1 to 4, wherein the sulfur content in the sulfonic acid-modified cellulose nanofiber (C) is in the range of 0.42 mmol / g to 3.0 mmol / g. ..
- Item 6. The brilliance according to any one of Items 1 to 5, wherein the content of the water (D) is in the range of 50 to 95 parts by mass with respect to 100 parts by mass of all the components of the brilliant pigment dispersion. Sex pigment dispersion.
- Item 7. The bright pigment dispersion according to any one of Items 1 to 6, which contains the resin water dispersion (E).
- Step (1) A step of applying a colored paint (X) on an object to be coated to form a colored coating film.
- Step (2) A step of coating the colored coating film with the glittering pigment dispersion according to any one of Items 1 to 7 to form a glittering coating film.
- Step (3) A step of applying a clear paint (Z) on the brilliant coating film to form a clear coating film, and
- Step (4) The colored coating film formed in the step (1), the brilliant coating film formed in the step (2), and the clear coating film formed in the step (3) are separately or.
- a method for forming a multi-layer coating film which comprises a step of curing by heating at the same time.
- Item 9 The method for forming a multi-layer coating film according to Item 8, wherein the film thickness of the brilliant coating film is in the range of 0.025 to 5 ⁇ m.
- the present invention it is possible to form a coating film having excellent metallic or pearly luster, and it is possible to obtain a bright pigment dispersion having stability with respect to shear.
- the bright pigment dispersion of the present invention is a bright pigment dispersion containing (A) a wetting agent, (B) a scaly bright pigment, (C) a sulfonic acid-modified cellulose nanofiber, and (D) water.
- the bright pigment dispersion contains 0.1 to 10 parts by mass of solid content with respect to 100 parts by mass of all the components of the bright pigment dispersion.
- wetting agent (A) As the wetting agent (A) in the bright pigment dispersion of the present invention, when the bright pigment dispersion is coated on the object to be coated, the bright pigment dispersion is uniformly oriented on the object to be coated. Any material that has a supporting effect can be used without particular limitation.
- a wetting agent Materials having such an action may be referred to as a wetting agent, a leveling agent, a surface conditioner, an antifoaming agent, a surfactant, a super wetter, etc., in addition to the wetting agent.
- Nure agent, leveling agent, surface conditioner, defoamer, surfactant, super wetter are also included.
- wetting agent (A) examples include silicone-based, acrylic-based, vinyl-based, fluorine-based, and acetylenediol-based wetting agents.
- the wetting agents may be used alone or in combination of two or more.
- the wetting agent (A) is an acetylene diol-based material from the viewpoint of obtaining a bright pigment dispersion having excellent water resistance, a metal or pearly luster, and a highly stable method for forming a multi-layer coating film. It is preferable to use a wetting agent and / or a wetting agent having an ethylene oxide chain.
- the wetting agent (A) is preferably a wetting agent which is an ethylene oxide adduct of acetylene diol.
- wetting agent (A) Commercially available products of the wetting agent (A) are, for example, Evonik Industries' Dynol series, Surfinol series, Tego series, Big Chemie's BYK series, Kyoeisha Chemical Co., Ltd.'s Granol series, Polyflow series, Kusumoto Kasei Co., Ltd. Examples include the company-made Disparon series.
- the content of the wetting agent (A) in the bright pigment dispersion of the present invention is based on 100 parts by mass of the solid content of the bright pigment dispersion from the viewpoint that the obtained multi-layer coating film is excellent in metal or pearly luster.
- the solid content is preferably 2 to 30 parts by mass, more preferably 2.5 to 25 parts by mass, and even more preferably 3 to 20 parts by mass.
- Scale-like bright pigment (B) examples of the scaly bright pigment (B) in the bright pigment dispersion of the present invention include vapor-deposited metal flake pigments, aluminum flake pigments, photointerfering pigments and the like. One or two or more of these pigments can be appropriately selected and used depending on the texture required for the obtained coating film. From the viewpoint of obtaining a coating film having excellent metallic luster, a vapor-deposited metal flake pigment and an aluminum flake pigment are suitable. On the other hand, from the viewpoint of obtaining a coating film having excellent pearly luster, a photocoherent pigment is suitable.
- the vapor-filmed metal flake pigment is obtained by depositing a metal film on a base base material, peeling off the base base material, and then crushing the vapor-deposited metal film.
- the base base material include a film and the like.
- the material of the metal is not particularly limited, and examples thereof include aluminum, gold, silver, copper, brass, titanium, chrome, nickel, nickel chrome, and stainless steel. Of these, aluminum or chromium is particularly preferable from the viewpoint of availability and handling.
- the vapor-deposited metal flake pigment obtained by depositing aluminum is referred to as "deposited aluminum flake pigment”
- the vapor-deposited metal flake pigment obtained by vapor-depositing chromium is referred to as "deposited chrome flake pigment”.
- the surface of the vapor-filmed aluminum flake pigment is treated with silica from the viewpoint of storage stability and obtaining a coating film having excellent metallic luster.
- vapor-filmed aluminum flake pigments Commercially available products that can be used as the above-mentioned vapor-filmed aluminum flake pigments include, for example, "METALURE” series (trade name, manufactured by Ekart), "Hydroshine WS” series (trade name, manufactured by Ekart), and “Decomet” series (trade name, manufactured by Schlenk). (Manufactured by BASF), "Metasheen” series (trade name, manufactured by BASF) and the like can be mentioned.
- vapor-filmed chrome flake pigment examples include the "Metalure Liquid Black” series (trade name, manufactured by Ekart Co., Ltd.) and the like.
- the average thickness of the vapor-filmed metal flake pigment is preferably 0.01 to 1.0 ⁇ m, more preferably 0.015 to 0.1 ⁇ m.
- the average particle size (D50) of the vapor-filmed metal flake pigment is preferably 1 to 50 ⁇ m, more preferably 5 to 20 ⁇ m.
- the average particle size here means the median size of the volume-based particle size distribution measured by the laser diffraction / scattering method using the Microtrack particle size distribution measuring device MT3300 (trade name, manufactured by Nikkiso Co., Ltd.).
- the thickness shall be defined as the average value of 100 or more measured values by observing the cross section of the coating film containing the scaly bright pigment with a microscope and measuring the thickness using image processing software. ..
- the average particle size exceeds the upper limit of 50 ⁇ m, a grainy feeling may occur in the multi-layer coating film, and if it is less than the lower limit of 1 ⁇ m, the change in brightness from the highlight to the shade becomes too small. In either case, the metallic luster may be lacking.
- Aluminum flake pigments are generally produced by pulverizing and grinding aluminum in a ball mill or an attritor mill in the presence of a pulverizing medium solution using a pulverizing aid.
- a pulverizing aid in the manufacturing process of the aluminum flake pigment include higher fatty acids such as oleic acid, stearic acid, isostearic acid, lauric acid, palmitic acid and myristic acid, as well as aliphatic amines, aliphatic amides and fatty alcohols. used.
- Aliphatic hydrocarbons such as mineral spirits are used as the pulverizing medium.
- the aluminum flake pigment can be roughly classified into a reefing type and a non-reefing type depending on the type of pulverizing aid.
- the bright pigment dispersion of the present invention is a non-leaving type scaly aluminum pigment from the viewpoint of forming a dense metallic coating film having excellent water resistance, high gloss in highlights, and a small graininess. Is preferable.
- the non-leafing type scaly aluminum pigment those whose surface is not particularly treated can be used, but those whose surface is coated with resin, those treated with silica, phosphoric acid, molybdic acid, and silane coupling agent. It is also possible to use the one whose surface has been treated with. From the above various surface treatments, one that has been subjected to one type of treatment can be used, but one that has been subjected to a plurality of types of treatment may be used.
- a colored aluminum pigment such as one in which the surface of the aluminum flake pigment is coated with a coloring pigment and further coated with a resin, or one in which the surface of the aluminum flake pigment is coated with a metal oxide such as iron oxide is used. You may.
- the aluminum flake pigment having an average particle size in the range of 1 to 100 ⁇ m is preferable and more preferable from the viewpoint of forming a dense metallic coating film having high glossiness in highlights and a small graininess.
- the average particle size is in the range of 5 to 50 ⁇ m, particularly preferably in the range of 7 to 30 ⁇ m.
- the thickness of the aluminum flake pigment is preferably in the range of 0.01 to 1.0 ⁇ m, and particularly preferably in the range of 0.02 to 0.5 ⁇ m.
- the vapor-deposited metal flake pigment and the aluminum flake pigment can be used in combination.
- the blending ratio of the vapor-filmed metal flake pigment and the aluminum flake pigment is 9/1 to 1/9, preferably 2/8 to 8/2 in terms of mass ratio.
- a photo-interfering pigment it is preferable to use a photo-interfering pigment in which a transparent or translucent base material is coated with titanium oxide.
- a transparent substrate refers to a substrate that transmits at least 90% of visible light.
- the translucent base material refers to a base material that transmits at least 10% or more and less than 90% of visible light.
- the photo-interfering pigment is a metal having a refractive index different from that of the transparent or translucent scaly substrate such as mica, artificial mica, glass, iron oxide, aluminum oxide, and various metal oxides. It is a bright pigment coated with an oxide.
- the metal oxide include titanium oxide and iron oxide, and the photo-interfering pigment can develop various different interference colors depending on the difference in the thickness of the metal oxide.
- photo-interfering pigment examples include the following metal oxide-coated mica pigments, metal oxide-coated alumina flake pigments, metal oxide-coated glass flake pigments, and metal oxide-coated silica flake pigments. can.
- the metal oxide-coated mica pigment is a pigment in which natural mica or artificial mica is used as a base material and the surface of the base material is coated with a metal oxide.
- Natural mica is a scaly base material obtained by crushing ore mica (mica).
- Artificial mica was synthesized by heating industrial raw materials such as SiO 2 , MgO, Al 2 O 3 , K 2 SiF 6 , and Na 2 SiF 6 , melting them at a high temperature of about 1500 ° C, cooling them, and crystallizing them. It has less impurities and is uniform in size and thickness when compared with natural mica.
- the base material of artificial mica are fluorine phlogopite (KMg 3 AlSi 3 O 10 F 2 ), potassium tetrasilicon mica (KMg 2.5 AlSi 4 O 10 F 2 ), and sodium tetrasilicon mica (NaMg 2.5 AlSi 4).
- O 10 F 2 Na teniolite (NaMg 2 LiSi 4 O 10 F 2 ), LiNa teniolite (LiMg 2 LiSi 4 O 10 F 2 ) and the like are known.
- the metal oxide-coated alumina flake pigment is a pigment whose base material is alumina flakes and whose surface is coated with a metal oxide.
- Alumina flakes mean scaly (flaky) aluminum oxide and are colorless and transparent. The alumina flakes do not have to be a single component of aluminum oxide and may contain oxides of other metals.
- the metal oxide-coated glass flake pigment is a pigment in which a scaly glass is used as a base material and the surface of the base material is coated with a metal oxide. Since the surface of the base material of the metal oxide-coated glass flake pigment is smooth, strong light reflection occurs.
- the metal oxide-coated silica flake pigment is a pigment in which a metal oxide coats scaly silica, which is a base material having a smooth surface and a uniform thickness.
- the photo-interfering pigment may be surface-treated to improve dispersibility, water resistance, chemical resistance, weather resistance, and the like.
- the above-mentioned photocoherent pigment having an average particle size in the range of 5 to 30 ⁇ m, particularly 7 to 20 ⁇ m.
- the light interfering pigment from the viewpoint of obtaining a coating film having excellent pearly luster, it is possible to use a pigment having an average thickness in the range of 0.05 to 1 ⁇ m, particularly 0.1 to 0.8 ⁇ m. preferable.
- the average particle size here means the median size of the volume-based particle size distribution measured by the laser diffraction / scattering method using the Microtrack particle size distribution measuring device MT3300 (trade name, manufactured by Nikkiso Co., Ltd.).
- the thickness shall be defined as the average value of 100 or more measured values by observing the cross section of the coating film containing the photocoherent pigment with a microscope and measuring the thickness using image processing software.
- the scaly bright pigment (B) in the bright pigment dispersion it is recommended to use a scaly bright pigment (B) having an average particle size in the range of 1 to 100 ⁇ m. It is preferable from the viewpoint of forming a coating film having a metallic or pearly luster, and more preferably the average particle size is in the range of 5 to 50 ⁇ m, and particularly preferably in the range of 7 to 30 ⁇ m.
- the thickness is preferably in the range of 0.01 to 1.0 ⁇ m, and particularly preferably in the range of 0.02 to 0.5 ⁇ m.
- the content of the scaly bright pigment (B) in the bright pigment dispersion of the present invention is 100 parts by mass of the solid content in the bright pigment dispersion from the viewpoint of obtaining a coating film having excellent metallic or pearly luster.
- it is preferably 5 to 85 parts by mass, more preferably 15 to 80 parts by mass, and even more preferably 30 to 75 parts by mass.
- the sulfonic acid-modified cellulose nanofiber (C) is a cellulose raw material, which is a fiber raw material containing cellulose such as pulp, finely divided to the nanometer level, and is a cellulose (D) constituting the cellulose nanofiber.
- a cellulose raw material which is a fiber raw material containing cellulose such as pulp, finely divided to the nanometer level, and is a cellulose (D) constituting the cellulose nanofiber.
- -At least a part of the hydroxyl group (-OH group) of a chain polymer in which glucose is ⁇ (1 ⁇ 4) glycosidic bonded is sulfonic acid-modified with a sulfo group represented by the following formula (1).
- r is an independent natural number of 1 to 3
- cellulose raw material examples include vegetable materials (for example, wood, bamboo, hemp, jute, kenaf, agricultural land waste, cloth, pulp (coniferous unbleached kraft pulp (NUKP), coniferous bleached kraft pulp (NBKP), broadleaf tree unbleached).
- vegetable materials for example, wood, bamboo, hemp, jute, kenaf, agricultural land waste, cloth, pulp (coniferous unbleached kraft pulp (NUKP), coniferous bleached kraft pulp (NBKP), broadleaf tree unbleached).
- the content of the sulfo group in the sulfonic acid-modified cellulose nanofiber (C) can be expressed by the sulfur content due to the sulfo group, and the content is not particularly limited, but the content of the sulfonic acid-modified cellulose nanofiber (C) is not particularly limited. From the viewpoint of dispersibility, transparency and stability with respect to the share of the sulfonic acid-modified cellulose nanofiber (C) in the bright pigment dispersion, the sulfur content per 1 g (mass) of the sulfonic acid-modified cellulose nanofiber (C) is determined.
- It is preferably 0.42 mmol / g to 3.0 mmol / g, more preferably 0.5 mmol / g to 3.0 mmol / g, and more preferably 0.5 mmol / g to 2.0 mmol / g. Further preferably, it is particularly preferably 0.5 mmol / g to 1.5 mmol / g.
- the sulfur content (that is, the content of the sulfo group) is determined by burning a predetermined amount of the sulfonic acid-modified cellulose nanofiber (C) and measuring the sulfur content in the combustible using a combustion ion chromatograph. It can be measured by a method according to 62321.
- the average fiber length of the sulfonic acid-modified cellulose nanofiber (C) can be indirectly expressed by the degree of polymerization.
- the average fiber length of the sulfonic acid-modified cellulose nanofiber (C) is preferably adjusted to have a degree of polymerization of 280 or more, more preferably 300 to 1000, and further preferably 300 to 600.
- the degree of polymerization of the sulfonic acid-modified cellulose nanofiber (C) is lower than 280, the entanglement of the fibers becomes weak due to the decrease in the fiber length.
- the degree of polymerization of the sulfonic acid-modified cellulose nanofiber (C) exceeds 1000, the dispersibility tends to be low, and the viscosity of the slurry when slurried becomes too high, and the dispersion stability tends to be low.
- the method for measuring the degree of polymerization is not particularly limited, but can be measured by, for example, the copper ethylenediamine method. Specifically, when the sulfonic acid-modified cellulose nanofiber (C) is dissolved in a 0.5 M copper ethylenediamine solution and the viscosity of the solution is measured by the viscosity method, the sulfonic acid-modified cellulose nanofiber (C) is polymerized. The degree can be measured.
- the average fiber width of the sulfonic acid-modified cellulose nanofiber (C) is not particularly limited as long as it has a thickness that makes it easy to obtain transparency when dispersed in an aqueous solvent, but the handling of the sulfonic acid-modified cellulose nanofiber (C) is not limited. From the viewpoint of property and transparency, it is preferably adjusted to 1 nm to 1000 nm, more preferably 2 nm to 100 nm, and further preferably 2 nm to 20 nm.
- the average fiber width can be measured using a known technique.
- the sulfonic acid-modified cellulose nanofiber (C) is dispersed in a solvent such as pure water, and the mixed solution is adjusted so as to have a predetermined mass%. Then, this mixed solution is spin-coated on a silica substrate coated with PEI (polyethyleneimine), and the sulfonic acid-modified cellulose nanofibers (C) on the silica substrate are observed.
- a scanning probe microscope for example, manufactured by Shimadzu Corporation; SPM-9700 can be used.
- Twenty sulfonic acid-modified cellulose nanofibers (C) in the obtained observation image can be randomly selected, and the average fiber width of the sulfonic acid-modified cellulose nanofibers (C) can be obtained by measuring and averaging each fiber width. can.
- the sulfonic acid-modified cellulose nanofiber (C) can be produced by a known method. Specifically, for example, it is obtained by a chemical treatment step of chemically treating a cellulose raw material to introduce a sulfo group, and a micronization treatment step of refining the sulfonic acid-modified pulp fiber obtained in the chemical treatment step. be able to.
- the chemical treatment step is a step of allowing a sulfonate having a sulfo group and urea or / or a derivative thereof to act on the cellulose raw material.
- the sulfonate agent is not particularly limited as long as it is a compound having a sulfo group, and examples thereof include sulfamic acid, sulfamate acid, and a sulfuryl compound having a sulfonyl group having two oxygens that co-bond with sulfur. ..
- the urea derivative is not particularly limited as long as it is a compound containing urea, and examples thereof include a carboxylic acid amide, a complex compound of isocyanate and amine, and thiamide.
- the processing apparatus used in the miniaturization processing step is not particularly limited, but for example, a low-pressure homogenizer, a high-pressure homogenizer, a grinder (stone mill type crusher), a ball mill, a cutter mill, a jet mill, a short-screw extruder, and a twin-screw extruder. , Ultrasonic stirrer, household mixer, etc. can be used.
- the content of the sulfonic acid-modified cellulose nanofibers (C) in the bright pigment dispersion of the present invention is a viewpoint of obtaining a coating film having excellent transparency, stability with respect to shear, and metallic or pearl-like gloss of the bright pigment dispersion. Therefore, it is preferably 2 to 60 parts by mass, more preferably 3 to 50 parts by mass, and 5 to 45 parts by mass based on 100 parts by mass of the solid content in the bright pigment dispersion. More preferred.
- the bright pigment dispersion of the present invention contains (A) a wetting agent, (B) scaly bright pigment, (C) sulfonic acid-modified cellulose nanofibers, and (D) water.
- the dispersion is a bright pigment dispersion containing 0.1 to 10 parts by mass of a solid content with respect to 100 parts by mass of all the components of the bright pigment dispersion.
- the content of water (D) in the bright pigment dispersion of the present invention is 100 parts by mass in total of all the components of the bright pigment dispersion from the viewpoint of obtaining a coating film having excellent metallic or pearly luster. , 50 to 95 parts by mass, more preferably 65 to 90 parts by mass, and even more preferably 75 to 90 parts by mass.
- the solid content in the bright pigment dispersion is low, so that the volume shrinkage after painting occurs.
- the size increases and the orientation of the bright material becomes good. Therefore, the solid content is advantageous in obtaining a coating film having excellent metallic or pearly luster.
- the solid content of the brilliant pigment dispersion is 0.5 to 0.5 to 100 parts by mass in total of all the components of the brilliant pigment dispersion from the viewpoint of obtaining a coating film having excellent metallic or pearly luster. It is preferably in the range of 8 parts by mass, and more preferably in the range of 1.5 to 6 parts by mass.
- the bright pigment dispersion of the present invention preferably further contains the resin aqueous dispersion (E) from the viewpoint of water resistance of the obtained coating film and the like.
- the resin water dispersion (E) is one in which the resin is dispersed in an aqueous solvent, and for example, a urethane resin water dispersion, an acrylic resin water dispersion, a polyester resin water dispersion, an olefin resin water dispersion, and these. It can contain at least one selected from the group consisting of composites of resins.
- the aqueous dispersion may be modified.
- urethane resin aqueous dispersions and acrylic resin aqueous dispersions are preferable, and hydroxyl group-containing urethane resin aqueous dispersions and hydroxyl group-containing acrylic resin aqueous dispersions are preferable from the viewpoint of water resistance of the obtained coating film.
- the hydroxyl group-containing acrylic resin aqueous dispersion is particularly preferably a core-shell type.
- the resin water dispersion (E) When the resin water dispersion (E) is used, its content is preferably in the range of 1 to 60 parts by mass based on 100 parts by mass of the total solid content in the bright pigment dispersion, and 5 to 40. It is more preferably within the range of parts by mass.
- the bright pigment dispersion may further include an organic solvent, a pigment other than the scaly bright pigment (B), a viscosity modifier other than the sulfonic acid-modified cellulose nanofiber (C), and a resin water, if necessary.
- a binder resin other than the dispersion (E), a crosslinkable component, a pigment dispersant, a precipitation inhibitor, an ultraviolet absorber, a light stabilizer and the like may be appropriately blended.
- pigments other than the scaly bright pigment (B) include colored pigments and extender pigments.
- the pigment can be used alone or in combination of two or more.
- the coloring pigment include titanium oxide, zinc oxide, carbon black, molybdenum red, purcian blue, cobalt blue, azo pigment, phthalocyanine pigment, quinacridone pigment, isoindolin pigment, slene pigment, and perylene pigment. , Dioxazine pigments, diketopyrrolopyrrole pigments and the like.
- the extender pigment include clay, kaolin, barium sulfate, barium carbonate, calcium carbonate, talc, silica, alumina white and the like.
- Examples of the viscosity adjusting agent other than the sulfonic acid-modified cellulose nanofiber (C) include a cellulose-based viscosity adjusting agent other than the sulfonic acid-modified cellulose nanofiber, a polyamide-based viscosity adjusting agent, a mineral-based viscosity adjusting agent, and a polyacrylic acid-based viscosity adjusting agent. Agents and the like can be used.
- polyamide-based viscosity modifier examples include polyamide amine salts and fatty acid polyamides.
- Examples of the mineral viscosity modifier include swellable layered silicate having a 2: 1 type structure in its crystal structure.
- smectite clay minerals such as natural or synthetic montmorillonite, saponite, hectorite, stibnsite, byderite, nontronite, bentonite, and laponite, Na-type tetrasilicic fluorine mica, and Li-type tetrasilicic fluorine mica.
- Na salt type fluorine teniolite swellable mica clay minerals such as Li type fluorine teniolite and vermiculite, substitutions and derivatives thereof, or mixtures thereof.
- polyacrylic acid-based viscosity modifier examples include sodium polyacrylate, a polyacrylic acid- (meth) acrylic acid ester copolymer, and the like.
- polyacrylic acid-based viscosity modifier Commercially available products of the polyacrylic acid-based viscosity modifier include, for example, "Primal ASE-60", “Primal TT615", “Primal RM5" (hereinafter, trade name) manufactured by Dow Chemical Co., Ltd., and "SN Thickener” manufactured by San Nopco Ltd. 613 ”,“ SN Thickener 618 ”,“ SN Thickener 630 ”,“ SN Thickener 634 ”,“ SN Thickener 636 ”(above, trade name) and the like can be mentioned.
- solid content acid value of the polyacrylic acid-based viscosity modifier those in the range of 30 to 300 mgKOH / g, preferably 80 to 280 mgKOH / g can be used.
- the content is in the range of 1 to 200 parts by mass in terms of solid content based on 100 parts by mass of solid content of the sulfonic acid-modified cellulose nanofiber (C). It is preferably in the range of 50 to 150 parts by mass.
- the crosslinkable component is a component for crosslinking and curing the resin water dispersion (E), and when it is not contained, the crosslinkable component is self-crosslinking. It may be a component for cross-linking and curing with a part of the colored coating material forming the colored coating film described later or a part of the clear coating material forming the clear coating film described later.
- the crosslinkable component include amino resin, urea resin, polyisocyanate compound, blocked polyisocyanate compound, polyisocyanate compound blocked with active methylene compound, epoxy group-containing compound, carboxyl group-containing compound, carbodiimide group-containing compound, and hydrazide.
- Examples thereof include group-containing compounds, semi-carbodiimide group-containing compounds, and silane coupling agents.
- an amino resin capable of reacting with a hydroxyl group a polyisocyanate compound, a blocked polyisocyanate compound, and a carbodiimide group-containing compound capable of reacting with a carboxyl group are preferable.
- the polyisocyanate compound and the blocked polyisocyanate compound those described in the section of clear paint described later can be used.
- the crosslinkable component can be used alone or in combination of two or more.
- the content thereof is the scaly bright pigment in the bright pigment dispersion of the present invention from the viewpoint of water resistance of the obtained coating film and the like.
- the solid content is preferably in the range of 1 to 100 parts by mass, more preferably in the range of 5 to 95 parts by mass, and 10 to 90 parts by mass. It is more preferable that it is within the range of.
- the bright pigment dispersion of the present invention contains the above-mentioned binder resin (consisting of a binder resin other than the resin water dispersion (E) and the resin water dispersion (E)) and / or a crosslinkable component, the binder resin.
- the total content of the crosslinkable component is 100 parts by mass of the solid content of the scaly bright pigment (B) in the bright pigment dispersion from the viewpoint of the metal or pearly luster of the obtained coating film and the water adhesion resistance.
- the solid content is preferably in the range of 0.1 to 500 parts by mass, more preferably in the range of 1 to 300 parts by mass, and preferably in the range of 10 to 100 parts by mass. More preferred.
- the brilliant pigment dispersion of the present invention has a viscosity of 100 to 10,000 mPa ⁇ sec, preferably 200, under the condition of a rotation speed of 6 rotations / minute (6 rpm) from the viewpoint of the metal or pearly luster of the obtained coating film. It is preferably in the range of about 8000 mPa ⁇ sec, more preferably 300 to 6000 mPa ⁇ sec.
- Viscosity is defined as the viscosity 1 minute after the start of measurement under certain conditions. Specifically, the prepared brilliant pigment dispersion is placed in a predetermined container, the rotation speed is set to 1000 rotations / minute using a rotary stirrer, and the mixture is stirred and mixed until uniform. Then, the measurement is started at a temperature of 20 ° C. with a B-type viscometer under the condition of 6 rpm, and is defined as the viscosity 1 minute after the start (also referred to as “B6 value” in the present specification). At this time, the viscometer used is "LVDV-I" (trade name, manufactured by BROOKFIELD, B-type viscometer). A rotation speed of 6 rpm is a general condition for controlling the viscosity of a quasi-plastic liquid.
- the multi-layer coating film forming method of the present invention is: Step (1): A step of applying a colored paint (X) on an object to be coated to form a colored coating film.
- Step (2) A step of coating the bright pigment dispersion of the present invention on the colored coating film to form a bright coating film.
- Step (4) The colored coating film formed in the step (1), the brilliant coating film formed in the step (2), and the clear coating film formed in the step (3) are separately or. It is a multi-layer coating film forming method including a step of curing by heating at the same time.
- a base coating film made of a transparent base coating film (W) may be formed between the colored coating film and the brilliant coating film.
- the multi-layer coating film of the present invention is formed on the object to be coated shown below.
- Examples of the object to be coated include metals such as iron, zinc and aluminum, metal materials such as alloys containing these, molded products made of these metals, molded products made of glass, plastics, foams and the like, films and the like. Can be done. Depending on these materials, degreasing treatment or surface treatment can be appropriately performed to obtain an object to be coated. Examples of the surface treatment include phosphate treatment, chromate treatment, composite oxide treatment and the like. Further, when the material of the object to be coated is a metal, it is preferable that an undercoat coating film is formed on the surface-treated metal material by a cationic electrodeposition paint or the like. When the material of the object to be coated is plastic, it is preferable that a primer coating film is formed on the degreased plastic material by the primer paint.
- thermosetting paint known per se
- a thermosetting paint which is mainly composed of a substrate resin, a cross-linking agent, a pigment, and a solvent such as an organic solvent and / or water.
- examples of the thermosetting paint include intermediate coating paints and base paints.
- the substrate resin used for the colored paint (X) examples include thermosetting resins and room temperature curable resins, but the resin is a thermosetting resin from the viewpoint of water resistance, chemical resistance, weather resistance, and the like. Is desirable.
- the substrate resin a resin having good weather resistance, transparency and the like is preferable, and specific examples thereof include acrylic resin, polyester resin, epoxy resin and urethane resin.
- acrylic resin examples include (meth) acrylic acid esters having functional groups such as ⁇ , ⁇ -ethylenic unsaturated carboxylic acid, hydroxyl groups, amide groups, methylol groups, and epoxy groups, and other (meth) acrylic acids.
- acrylic acid esters having functional groups such as ⁇ , ⁇ -ethylenic unsaturated carboxylic acid, hydroxyl groups, amide groups, methylol groups, and epoxy groups
- other (meth) acrylic acids examples include a resin obtained by copolymerizing an ester, styrene, or the like.
- polyester resin examples include polyhydric alcohols such as ethylene glycol, propylene glycol, butylene glycol, 1,6-hexanediol, trimethylolpropane, and pentaerythritol, and adipic acid, isophthalic acid, terephthalic acid, phthalic anhydride, and hexahydro.
- a polyester resin or the like obtained by a condensation reaction with a polyvalent carboxylic acid component such as phthalic acid anhydride or trimellitic anhydride can be used.
- epoxy resin examples include so-called bisphenol A type epoxy resins produced by a condensation reaction between bisphenol A and epichlorohydrin.
- urethane resin examples include a compound obtained by an addition reaction between a diisocyanate compound and a polyhydric alcohol, and a resin obtained by reacting the above acrylic resin, polyester resin or epoxy resin with a diisocyanate compound to increase the molecular weight.
- the colored paint (X) may be either a water-based paint or a solvent-based paint, but it is desirable that the colored paint (X) is a water-based paint from the viewpoint of reducing VOC of the paint.
- the coloring paint (X) is a water-based paint
- the substrate resin has a sufficient amount of hydrophilic groups such as a carboxyl group, a hydroxyl group, a methylol group, an amino group, and a sulfonic acid to make the resin water-soluble or water-dispersed.
- a resin containing a carboxyl group, such as a group or a polyoxyethylene bond, is used, and the hydrophilic group is neutralized to form an alkali salt to make the substrate resin water-soluble or water-dispersible.
- the amount of the hydrophilic group, for example, the carboxyl group at that time is not particularly limited and can be arbitrarily selected depending on the degree of water solubility or water dispersion, but generally, about 10 mgKOH / based on the acid value. It can be in the range of g or more, preferably 30 to 200 mgKOH / g.
- the alkaline substance used for neutralization include sodium hydroxide, an amine compound and the like.
- the water-dispersion of the above resin can also be carried out by emulsifying and polymerizing the polymerizable component in the presence of a surfactant or a water-soluble resin. Further, it can also be obtained by dispersing the above resin in water in the presence of, for example, an emulsifier.
- the hydrophilic group may not be contained at all in the substrate resin, or may be contained in a smaller amount than the water-soluble resin.
- the cross-linking agent is for cross-linking and curing the substrate resin by heating, and those exemplified as the cross-linking component in the description column of the bright pigment dispersion of the present invention can be used.
- the ratio of each of the above components in the colored paint (X) can be arbitrarily selected as needed, but from the viewpoint of water resistance, finishability, etc., the substrate resin and the cross-linking agent are generally composed of both components.
- the former is preferably in the range of 60 to 90% by mass, particularly 70 to 85% by mass, and the latter is preferably in the range of 10 to 40% by mass, particularly 15 to 30% by mass.
- the pigment imparts color and base hiding property to the colored coating film formed by the colored paint (X).
- the type and blending amount of the pigment can be appropriately adjusted according to the hue or lightness required for the multi-layer coating film.
- the brightness L * value of the coating film obtained by the colored paint (X) is 0.1 to 90, preferably 0.1 to 70, and more preferably 0. It can be adjusted to be within the range of 1 to 60.
- the pigment include metallic pigments, rust preventive pigments, coloring pigments, extender pigments and the like. Among them, it is preferable to use coloring pigments, and a coating film having excellent base hiding property, metal or pearly luster is obtained. It is more preferable to use a black pigment from the viewpoint of obtaining or the like.
- the type and blending amount of the pigment in the colored paint (X) are preferably adjusted so that the L * of the colored coating film is within the above range.
- the cured film thickness of the colored coating film obtained by the colored coating film (X) is preferably 3 ⁇ m to 50 ⁇ m, more preferably 5 to 50 ⁇ m, from the viewpoint of the hiding property of the base and the metal or pearly luster of the multi-layer coating film. It is 45 ⁇ m, more preferably 8 to 40 ⁇ m.
- the cured film thickness can be 15 ⁇ m to 50 ⁇ m, preferably 18 to 45 ⁇ m, and more preferably 20 to 40 ⁇ m.
- the coating of the coloring paint (X) can be carried out according to a usual method, and when the coloring paint (X) is a water-based paint, for example, deionized water is added to the coloring paint (X), and if necessary, a thickener. After adjusting the solid content to about 30 to 70% by mass and the viscosity to 500 to 6000 cps / 6 rpm (B-type viscosity meter) by adding an additive such as a defoaming agent, the surface to be coated is spray-painted and rotated. It can be done by atomization coating or the like. At the time of painting, electrostatic application can be performed if necessary.
- the colored paint (X) has a black-and-white concealing film thickness of preferably 80 ⁇ m or less, more preferably 10 to 60 ⁇ m, and even more preferably 15 to 50 ⁇ m.
- the “black and white concealment film thickness” refers to the film thickness after the black and white checkered concealment rate test paper specified in 4.1.2 of JIS K5600-4-1 is attached to a steel plate. After the paint is graded and dried or cured so that the film thickness changes continuously, the coated surface is visually observed under diffuse daylight, and the black-and-white boundary of the checkered pattern on the concealment test paper is the minimum that cannot be seen. It is a value measured by an electromagnetic film thickness meter.
- the bright pigment dispersion of the present invention or the base paint (W) which may be transparent is coated on the uncured colored coating film of the colored paint (X), the above-mentioned colored paint (X) is applied. Later, after leaving it at room temperature for 15 to 30 minutes or heating it at a temperature of 50 to 100 ° C. for 30 seconds to 10 minutes, the bright pigment dispersion of the present invention or the base paint (W) which may be transparent is applied. Can be painted.
- the heating temperature is preferably in the range of 110 to 180 ° C, particularly preferably 120 to 160 ° C.
- the heat treatment time is preferably in the range of 10 to 60 minutes, particularly preferably 15 to 40 minutes.
- Base paint (W) that may be transparent
- base paint (W) a paint composition known per se can be used.
- the base paint (W) it is preferable to use a paint composition usually used when painting an automobile body or the like.
- the base paint (W) is preferably a paint containing a substrate resin, a curing agent, and a medium composed of water and / or an organic solvent.
- the substrate resin is preferably a resin having good weather resistance and transparency, and specific examples thereof include acrylic resin, polyester resin, epoxy resin, and urethane resin.
- acrylic resin examples include (meth) acrylic acid esters having functional groups such as ⁇ , ⁇ -ethylenic unsaturated carboxylic acid, hydroxyl groups, amide groups, and methylol groups; other (meth) acrylic acid esters; styrene and the like. Examples thereof include a resin obtained by copolymerizing a monomer component.
- polyester resin examples include those obtained by subjecting a polybasic acid, a polyhydric alcohol, and a modified oil to a condensation reaction by a conventional method.
- the epoxy resin includes, for example, an epoxy resin obtained by synthesizing an epoxy ester by a reaction between an epoxy group and an unsaturated fatty acid and adding ⁇ , ⁇ -unsaturated acid to the unsaturated group, and a hydroxyl group of the epoxy ester.
- Epoxy resins obtained by a method of esterifying a polybasic acid such as phthalic acid and trimellitic acid are examples of epoxy resins obtained by synthesizing an epoxy ester by a reaction between an epoxy group and an unsaturated fatty acid and adding ⁇ , ⁇ -unsaturated acid to the unsaturated group, and a hydroxyl group of the epoxy ester.
- the urethane resin is selected from, for example, at least one diisocyanate compound selected from the group consisting of an aliphatic diisocyanate compound, an alicyclic diisocyanate compound and an aromatic diisocyanate compound, and a group consisting of a polyether polyol, a polyester polyol and a polycarbonate polyol.
- diisocyanate compound selected from the group consisting of an aliphatic diisocyanate compound, an alicyclic diisocyanate compound and an aromatic diisocyanate compound
- a polyether polyol a polyester polyol and a polycarbonate polyol.
- a urethane resin obtained by reacting with at least one kind of polyol compound and a urethane resin obtained by reacting the acrylic resin, polyester resin or epoxy resin with a dipolyisocyanate compound to increase the molecular weight.
- the base paint (W) may be either a water-based paint or a solvent-based paint, but it is desirable that the base paint (W) is a water-based paint from the viewpoint of reducing VOC of the paint.
- the base paint (W) is a water-based paint
- a sufficient amount of hydrophilic groups such as a carboxyl group, a hydroxyl group, a methylol group, an amino group, and a sulfonic acid are used to make the resin water-soluble or water-dispersed.
- the substrate resin water-soluble or water-dispersible by using a resin containing a carboxyl group, such as a group or a polyoxyethylene group, and neutralizing the hydrophilic group to form an alkali salt.
- the amount of the hydrophilic group, for example, the carboxyl group at that time is not particularly limited and can be arbitrarily selected depending on the degree of water solubility or water dispersion, but generally, about 10 mgKOH / based on the acid value. It can be in the range of g or more, preferably 30 to 200 mgKOH / g.
- the alkaline substance used for neutralization include sodium hydroxide and an amine compound.
- the aqueous dispersion of the resin can also be carried out by emulsifying and polymerizing the monomer component in the presence of a surfactant and, optionally, a water-soluble resin. Further, it can also be obtained by dispersing the above resin in water in the presence of, for example, an emulsifier.
- the substrate resin may not contain the hydrophilic groups at all, or may contain less hydrophilic groups than the water-soluble resin.
- the curing agent is for cross-linking and curing the substrate resin by heating, and is, for example, an amino resin, a polyisocyanate compound (including an unblocked polyisocyanate compound and a blocked polyisocyanate compound), an epoxy group-containing compound, and the like.
- examples thereof include a carboxyl group-containing compound, a carbodiimide group-containing compound, a hydrazide group-containing compound, and a semi-carbodiide group-containing compound.
- an amino resin capable of reacting with a hydroxyl group, a polyisocyanate compound, and a carbodiimide group-containing compound capable of reacting with a carboxyl group are preferable.
- the above-mentioned cross-linking agent can be used alone or in combination of two or more.
- an amino resin obtained by condensing or cocondensing melamine, benzoguanamine, urea or the like with formaldehyde, or further etherifying with a lower monohydric alcohol is preferably used.
- a polyisocyanate compound can also be preferably used.
- the ratio of each of the above components in the base paint (W) can be arbitrarily selected as needed, but from the viewpoint of water resistance, finishability, etc., the substrate resin and the cross-linking agent are generally composed of both components.
- the former is preferably in the range of 50 to 90% by mass, particularly 60 to 85% by mass, and the latter is preferably in the range of 10 to 50% by mass, particularly 15 to 40% by mass.
- An organic solvent can be used as the base paint (W) if necessary. Specifically, those usually used for paints can be used.
- the organic solvent include hydrocarbons such as toluene, xylene, hexane and heptane; esters such as ethyl acetate, butyl acetate, ethylene glycol monomethyl ether acetate, diethylene glycol monoethyl ether acetate and diethylene glycol monobutyl acetate; ethylene glycol monomethyl ether, Ethers such as ethylene glycol diethyl ether, diethylene glycol monomethyl ether and diethylene glycol dibutyl ether; alcohols such as butanol, propanol, octanol, cyclohexanol and diethylene glycol; organic solvents of ketones such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone and isophorone can be mentioned. These can be used
- a coloring pigment in addition to the above components, if desired, a coloring pigment, an extender pigment, a bright pigment, an ultraviolet absorber, an antifoaming agent, a viscosity modifier, a basic compound, a rust preventive, and a surface.
- An adjusting agent or the like may be appropriately contained.
- the base paint (W) may be a transparent paint or a colored paint, but is preferably a transparent paint from the viewpoint of obtaining a coating film having excellent metallic or pearly luster.
- the base paint (W) is a transparent paint means that the haze value of a dry film having a film thickness of 35 ⁇ m obtained by painting the base paint (W) is 25% or less.
- the haze value was measured by applying a base paint to a smooth PTFE plate and measuring the cured and peeled coating film with a turbidity meter COH-300A (trade name, manufactured by Nippon Denshoku Kogyo Co., Ltd.). It shall be defined as a numerical value calculated by the following equation (2) from the diffused light transmittance (DF) and the parallel light transmittance (PT).
- an extender pigment can be contained if necessary.
- the extender pigment include barium sulfate, barium carbonate, calcium carbonate, aluminum silicate, silica, magnesium carbonate, talc, and alumina white.
- the blending amount thereof is preferably in the range of 0.1 to 30 parts by mass with respect to 100 parts by mass of the resin solid content in the base paint (W), and more preferably 0.1. It is in the range of about 20 parts by mass.
- the base paint (W) When the base paint (W) is a colored paint, it contains a colored pigment.
- the base paint (W) can contain a coloring pigment such as titanium oxide and carbon black from the viewpoint of controlling light transmission, and further contains a conventionally known coloring pigment other than titanium oxide and carbon black, if necessary. be able to.
- the coloring pigment is not particularly limited, but specifically, an iron oxide pigment, a composite metal oxide pigment such as titanium yellow, an azo pigment, a quinacridone pigment, a diketopyrrolopyrrole pigment, and a perylene pigment.
- the brilliant pigment include those exemplified in the column of the scaly brilliant pigment.
- the blending amount thereof is preferably in the range of 0.1 to 50 parts by mass with respect to 100 parts by mass of the resin solid content in the base paint (W), and more preferably 0.2. It is in the range of about 40 parts by mass.
- the cured film thickness of the base coating film obtained by the base paint (W) is preferably 3 ⁇ m or more, more preferably 3 to 20 ⁇ m, and further preferably 5 to 15 ⁇ m from the viewpoint of smoothness and metallic glossiness. be.
- the base paint (W) can be painted according to a usual method, and examples thereof include air spray painting, airless spray painting, and rotary atomization painting.
- electrostatic coating may be applied as needed.
- electrostatic coating of the rotary atomization method and electrostatic coating of the air spray method are preferable, and the rotary atomization method is used. Electrostatic coating is particularly preferred.
- the base paint (W) is appropriately used as water and / or an organic solvent and, if necessary, an additive such as a viscosity modifier and a defoaming agent. It is preferable to adjust the solid content and viscosity to be suitable for coating.
- the solid content of the base paint (W) is preferably in the range of 10 to 60% by mass, preferably 15 to 55% by mass, and more preferably 20 to 50% by mass.
- the viscosity of the base paint (W) at 20 ° C. and 6 rpm with a B-type viscometer is preferably in the range of 200 to 7000 cps, more preferably 300 to 6000 cps, and even more preferably 500 to 5000 cps.
- the base paint (W) is applied and then left at room temperature for 15 to 30 minutes, or 50.
- the bright pigment dispersion (Y) of the present invention can be coated after heating at a temperature of about 100 ° C. for 30 seconds to 10 minutes.
- the heating temperature is preferably in the range of 110 to 180 ° C, particularly preferably 120 to 160 ° C.
- the heat treatment time is preferably in the range of 10 to 60 minutes, particularly preferably 15 to 40 minutes.
- the bright pigment dispersion of the present invention can be coated by a method such as electrostatic coating, air spray, or airless spray. These coating methods may be electrostatically applied, if necessary. In the method for forming a multi-layer coating film of the present invention, rotary atomization type electrostatic coating is particularly preferable.
- the film thickness 30 seconds after the glitter pigment dispersion (Y) of the present invention adheres to the object to be coated is preferably 3 to 25 ⁇ m, more preferably 3 to 25 ⁇ m, from the viewpoint of obtaining a coating film having excellent metal or pearl-like luster. Is 4 to 24 ⁇ m, more preferably 5 to 23 ⁇ m.
- the dry film thickness of the brilliant coating film is preferably 0.025 to 5 ⁇ m, more preferably 0.15 to 3 ⁇ m.
- the paint may be left at room temperature for 15 to 30 minutes, or heated at a temperature of 50 to 100 ° C. for 30 seconds to 10 minutes, and then the clear paint (Z) may be painted. can.
- thermosetting clear paint composition As the clear paint (Z), any known thermosetting clear paint composition can be used.
- thermosetting clear coating composition include an organic solvent-type thermosetting coating composition containing a base resin having a crosslinkable functional group and a curing agent, an aqueous thermosetting coating composition, and powder thermosetting. Examples include paint compositions.
- Examples of the crosslinkable functional group of the substrate resin include a carboxyl group, a hydroxyl group, an epoxy group, and a silanol group.
- Examples of the type of the substrate resin include acrylic resin, polyester resin, alkyd resin, urethane resin, epoxy resin, fluororesin and the like.
- Examples of the curing agent include polyisocyanate compounds, blocked polyisocyanate compounds, melamine resins, urea resins, carboxyl group-containing compounds, carboxyl group-containing resins, epoxy group-containing resins, and epoxy group-containing compounds.
- the combination of the base resin / curing agent of the clear paint (Z) includes a carboxyl group-containing resin / epoxy group-containing resin, a hydroxyl group-containing resin / polyisocyanate compound, a hydroxyl group-containing resin / blocked polyisocyanate compound, and a hydroxyl group-containing resin / melamine resin. Etc. are preferable.
- the clear paint (Z) may be a one-component paint or a multi-component paint such as a two-component paint.
- the clear paint (Z) is preferably a two-component clear paint containing the following hydroxyl group-containing resin and polyisocyanate compound from the viewpoint of the adhesiveness of the obtained coating film.
- the hydroxyl group-containing resin a conventionally known resin can be used without limitation as long as it contains a hydroxyl group.
- the hydroxyl group-containing resin include a hydroxyl group-containing acrylic resin, a hydroxyl group-containing polyester resin, a hydroxyl group-containing polyether resin, and a hydroxyl group-containing polyurethane resin, and preferred examples thereof include a hydroxyl group-containing acrylic resin and a hydroxyl group-containing polyester resin.
- Acrylic resin containing a hydroxyl group can be mentioned as a particularly preferable one.
- the hydroxyl value of the hydroxyl group-containing acrylic resin is preferably in the range of 80 to 200 mgKOH / g, more preferably in the range of 100 to 180 mgKOH / g, from the viewpoint of scratch resistance and water resistance of the coating film. ..
- the weight average molecular weight of the hydroxyl group-containing acrylic resin is preferably in the range of 2,500 to 40,000, and more preferably in the range of 5,000 to 30,000, from the viewpoint of acid resistance and smoothness of the coating film.
- the weight average molecular weight is a value calculated from a chromatogram measured by a gel permeation chromatograph based on the molecular weight of standard polystyrene.
- the gel permeation chromatograph "HLC8120GPC” (manufactured by Tosoh Corporation) was used.
- Tetrahydrofuran measurement temperature; 40 ° C., flow rate; 1 cc / min, detector; RI conditions.
- the glass transition temperature of the hydroxyl group-containing acrylic resin is preferably ⁇ 40 ° C. to 20 ° C., particularly preferably in the range of ⁇ 30 ° C. to 10 ° C.
- the coating film hardness is sufficient, and when the glass transition temperature is 20 ° C. or lower, the coating surface smoothness of the coating film can be maintained.
- Polyisocyanate compound A polyisocyanate compound is a compound having at least two isocyanate groups in one molecule, and is, for example, an aliphatic polyisocyanate, an alicyclic polyisocyanate, an aromatic aliphatic polyisocyanate, an aromatic polyisocyanate, or the like. Examples thereof include derivatives of polyisocyanate.
- aliphatic polyisocyanate examples include trimethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, pentamethylene diisocyanate, 1,2-propylene diisocyanate, 1,2-butylenediocyanate, 2,3-butylenediocyanate, and 1,3.
- -Adicyclic diisocyanates such as butylene diisocyanate, 2,4,4- or 2,2,4-trimethylhexamethylene diisocyanate, diisocyanate diisocyanate, methyl 2,6-diisocyanatohexanoate (common name: lysine diisocyanate); 2 , 6-Diisocyanatohexanoic acid 2-isocyanatoethyl, 1,6-diisocyanato-3-isocyanatomethylhexane, 1,4,8-triisocyanatooctane, 1,6,11-triisocyanatoundecane, 1, , 8-Diisocyanato-4-isocyanatomethyloctane, 1,3,6-triisocyanatohexane, 2,5,7-trimethyl-1,8-diisocyanato-5-isocyanatomethyloctane and other aliphatic triisocyanates, etc.
- alicyclic polyisocyanate examples include 1,3-cyclopentenediisocyanate, 1,4-cyclohexanediisocyanate, 1,3-cyclohexanediisocyanate, and 3-isocyanatomethyl-3,5,5-trimethylcyclohexylisocyanate (common name).
- Isophorone diisocyanate 4-methyl-1,3-cyclohexylene diisocyanate (common name: hydrogenated TDI), 2-methyl-1,3-cyclohexylene diisocyanate, 1,3- or 1,4-bis (isocyanato) Alicyclic diisocyanates such as methyl) cyclohexane (conventional name: hydrogenated xylylene diisocyanate) or a mixture thereof, methylenebis (4,1-cyclohexanediyl) diisocyanate (conventional name: hydrogenated MDI), norbornan diisocyanate; 1,3,5 -Triisocyanatocyclohexane, 1,3,5-trimethylisocyanatocyclohexane, 2- (3-isocyanatopropyl) -2,5-di (isocyanatomethyl) -bicyclo (2.2.1) heptane, 2- (3-Isocyanatopropyl)
- aromatic aliphatic polyisocyanate examples include methylenebis (4,1-phenylene) diisocyanate (common name: MDI), 1,3- or 1,4-xylylene diisocyanate or a mixture thereof, ⁇ , ⁇ '-diisocyanato-.
- Aromatic aliphatic diisocyanates such as 1,4-diethylbenzene, 1,3- or 1,4-bis (1-isocyanato-1-methylethyl) benzene (common name: tetramethylxylylene diisocyanate) or a mixture thereof; 1,3 , 5-Aroma aliphatic triisocyanates such as triisocyanatomethylbenzene can be mentioned.
- aromatic polyisocyanate examples include m-phenylenedi isocyanate, p-phenylenedi isocyanate, 4,4'-diphenyldiisocyanate, 1,5-naphthalenedi isocyanate, and 2,4-tolylene diisocyanate (common name: 2,4-).
- aromatic diisocyanates such as 4,4'-toluidine diisocyanate, 4,4'-diphenyl ether diisocyanate; triphenylmethane-4 , 4', 4''-triisocyanate, 1,3,5-triisocyanatobenzene, 2,4,6-triisocyanatotoluene and other aromatic triisocyanates; 4,4'-diphenylmethane-2,2' , 5,5'-Aromatic tetraisocyanates such as tetraisocyanates can be mentioned.
- polyisocyanate derivative examples include the above-mentioned polyisocyanate dimer, trimmer, biuret, allophanate, uretdione, uretoimine, isocyanurate, oxadiazine trione, and polymethylene polyphenyl polyisocyanate (crude MDI, polypeptide MDI). , Crude TDI and the like.
- the derivative of the polyisocyanate may be used alone or in combination of two or more.
- the polyisocyanate and its derivatives may be used alone or in combination of two or more.
- Hexamethylene diisocyanate compounds can be preferably used among the aliphatic diisocyanates, and 4,4'-methylenebis (cyclohexylisocyanate) can be preferably used among the alicyclic diisocyanates.
- the hexamethylene diisocyanate derivative is particularly suitable from the viewpoint of adhesion, compatibility and the like.
- the polyisocyanate compound the polyisocyanate and its derivative are reacted with a compound having an active hydrogen group such as a hydroxyl group or an amino group that can react with the polyisocyanate under the condition of excess isocyanate group.
- a compound having an active hydrogen group such as a hydroxyl group or an amino group that can react with the polyisocyanate under the condition of excess isocyanate group.
- Prepolymer may be used.
- the compound capable of reacting with the polyisocyanate include polyhydric alcohols, low molecular weight polyester resins, amines, water and the like.
- a blocked polyisocyanate compound which is a compound in which the isocyanate group in the polyisocyanate and its derivative is blocked with a blocking agent can also be used.
- the blocking agent examples include phenol-based agents such as phenol, cresol, xylenol, nitrophenol, ethylphenol, hydroxydiphenyl, butylphenol, isopropylphenol, nonylphenol, octylphenol, and methyl hydroxybenzoate; Oximes such as ⁇ -butyrolactam and ⁇ -propiolactam; aliphatic alcohols such as methanol, ethanol, propyl alcohol, butyl alcohol, amyl alcohol and lauryl alcohol; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono Ether systems such as butyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, and methoxymethanol; benzyl alcohol, glycolic acid, methyl glycolate, ethyl glycolate, butyl glycolate, lactic acid, methyl lactate, ethyl
- Alcohol systems such as butyl, methylol urea, methylol melamine, diacetone alcohol, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate; formamide oxime, acetoamide oxime, acetooxime, methyl ethyl ketooxime, diacetylmonooxime, benzophenone oxime, cyclohexane oxime, etc.
- Oxime-based active methylene-based such as dimethyl malonate, diethyl malonate, ethyl acetoacetate, methyl acetoacetate, acetylacetone; butyl mercaptan, t-butyl mercaptan, hexyl mercaptan, t-dodecyl mercaptan, 2-mercaptobenzothiazole, thio Melcaptans such as phenol, methylthiophenols and ethylthiophenols; acidamides such as acetoanilides, acetoanisides, acetotolides, acrylamides, methacrylicamides, acetate amides, stearate amides and benzamides; succinic acid imides, phthalic acid imides, maleate imides and the like.
- active methylene-based such as dimethyl malonate, diethyl malonate, ethyl acetoacetate,
- Imid system amine system such as diphenylamine, phenylnaphthylamine, xylidine, N-phenylxylidine, carbazole, aniline, naphthylamine, butylamine, dibutylamine, butylphenylamine; imidazole system such as imidazole, 2-ethylimidazole; urea, thio Urea, oxime urea, ethylenethiourea, dife Urea-based such as nylurea; carbamic acid ester-based such as N-phenylcarbamic acid phenyl; imine-based such as ethyleneimine and propyleneimine; sulfite-based such as sodium bisulfite and potassium bisulfite; azole-based compounds, etc.
- amine system such as diphenylamine, phenylnaphthylamine, xylidine, N-phenylxylidine, carbazo
- azole compound examples include pyrazole, 3,5-dimethylpyrazole, 3-methylpyrazole, 4-benzyl-3,5-dimethylpyrazole, 4-nitro-3,5-dimethylpyrazole, 4-bromo-3, Pyrazole or pyrazole derivative such as 5-dimethylpyrazole, 3-methyl-5-phenylpyrazole; imidazole or imidazole derivative such as imidazole, benzimidazole, 2-methylimidazole, 2-ethylimidazole, 2-phenylimidazole; 2-methylimidazoline , 2-Pyrazole and other imidazoline derivatives such as phenylimidazolin.
- a solvent can be added as needed.
- the solvent used for the blocking reaction may be one that is not reactive with the isocyanate group, for example, acetone, ketones such as methyl ethyl ketone, esters such as ethyl acetate, and N-methyl-2-pyrrolidone (NMP). Such solvents can be mentioned.
- the polyisocyanate compound can be used alone or in combination of two or more.
- the equivalent ratio (OH / NCO) of the hydroxyl group of the hydroxyl group-containing resin to the isocyanate group of the polyisocyanate compound is preferably 0.5 to 2.0, and further, from the viewpoint of curability and scratch resistance of the coating film. It is preferably in the range of 0.8 to 1.5.
- the clear paint (Z) When a two-component clear paint containing a hydroxyl group-containing resin and a polyisocyanate compound is used as the clear paint (Z), it is preferable that the hydroxyl group-containing resin and the polyisocyanate compound are separated from each other in terms of storage stability. Both are mixed and adjusted immediately before use.
- a one-component paint may be used.
- the combination of the base resin / curing agent in the one-component paint include a carboxyl group-containing resin / epoxy group-containing resin, a hydroxyl group-containing resin / blocked polyisocyanate compound, and a hydroxyl group-containing resin / melamine resin.
- the clear paint (Z) can further appropriately contain a solvent such as water or an organic solvent, a curing catalyst, an antifoaming agent, an ultraviolet absorber and the like, if necessary.
- the clear paint (Z) can be appropriately blended with a coloring pigment as long as the transparency is not impaired.
- a coloring pigment one kind or a combination of two or more kinds of pigments conventionally known for inks and paints can be blended.
- the amount to be added may be appropriately determined, but is 30 parts by mass or less, preferably 0.01 to 10 parts by mass, based on 100 parts by mass of the vehicle-forming resin composition in the clear paint.
- the form of the clear paint (Z) is not particularly limited, but it is usually used as an organic solvent type paint composition.
- organic solvent used in this case, various organic solvents for paints, for example, aromatic or aliphatic hydrocarbon solvents; ester solvents; ketone solvents; ether solvents and the like can be used.
- organic solvent to be used the one used at the time of preparation of the hydroxyl group-containing resin or the like may be used as it is, or may be further added as appropriate.
- the solid content concentration of the clear paint (Z) is preferably in the range of about 30 to 70% by mass, more preferably in the range of about 40 to 60% by mass.
- the above-mentioned clear paint (Z) is applied onto the brilliant coating film.
- the coating of the clear paint (Z) is not particularly limited and can be performed by the same method as the colored paint (X), for example, by a coating method such as air spray, airless spray, rotary atomization coating, curtain coat coating or the like. Can be done. These coating methods may be electrostatically applied, if necessary. Of these, rotary atomization coating by electrostatic application is preferable.
- the coating amount of the clear paint (Z) is usually preferably an amount of about 10 to 50 ⁇ m as the cured film thickness.
- the viscosity of the clear paint (Z) is set to a viscosity range suitable for the painting method, for example, in the case of rotary atomization painting by electrostatic application, the Ford Cup No. 4 It is preferable to appropriately adjust the viscosity by using a solvent such as an organic solvent so that the viscosity range is about 15 to 60 seconds as measured by a viscometer.
- the method for forming a multi-layer coating film of the present invention includes a step of curing a colored coating film, a brilliant coating film and a clear coating film by heating them separately or simultaneously.
- the colored coating film, the brilliant coating film and the clear coating film are simultaneously heat-cured from the viewpoint of shortening the process.
- the multi-layer coating film contains a base coating film
- a multi-layer coating film having excellent metallic or pearly luster is obtained, and from the viewpoint of shortening the process, a colored coating film is formed and then heat-cured. After that, it is preferable to heat and cure the three layers of the base coating film, the brilliant coating film, and the clear coating film at the same time.
- the above heating can be performed by a known means, and for example, a drying furnace such as a hot air furnace, an electric furnace, or an infrared induction heating furnace can be applied.
- the heating temperature is preferably in the range of 70 to 150 ° C, preferably 80 to 140 ° C.
- the heating time is not particularly limited, but is preferably in the range of 10 to 40 minutes, more preferably 20 to 30 minutes.
- the present invention can also adopt the following configuration.
- a bright pigment dispersion containing (A) a wetting agent, (B) a scaly bright pigment, (C) a sulfonic acid-modified cellulose nanofiber, and (D) water.
- Item 2. The bright pigment dispersion according to Item 1, wherein the content of the wetting agent (A) is in the range of 2 to 30 parts by mass with reference to 100 parts by mass of the solid content in the bright pigment dispersion.
- the content of the wetting agent (A) is in the range of 2.5 to 25 parts by mass, preferably in the range of 3 to 20 parts by mass, based on 100 parts by mass of the solid content in the bright pigment dispersion.
- Item 2. The bright pigment dispersion according to Item 1.
- Item 4 The bright pigment dispersion according to any one of Items 1 to 3, wherein the wetting agent (A) is an acetylene diol-based wetting agent, a wetting agent having an ethylene oxide chain, or both.
- the wetting agent (A) is an acetylene diol-based wetting agent, a wetting agent having an ethylene oxide chain, or both.
- Item 5 The bright pigment dispersion according to any one of Items 1 to 4, wherein the wetting agent (A) is an ethylene oxide adduct of acetylene diol.
- Item 6 Item 1 to Item 5 in which the content of the scaly bright pigment (B) is in the range of 5 to 85 parts by mass with reference to 100 parts by mass of the solid content in the bright pigment dispersion.
- the bright pigment dispersion according to.
- the content of the scaly bright pigment (B) is in the range of 15 to 80 parts by mass, preferably 30 to 75 parts by mass, based on 100 parts by mass of the solid content in the bright pigment dispersion.
- Item 2. The bright pigment dispersion according to any one of Items 1 to 5, which is within the range.
- Item 8 Item 1 to any one of Items 1 to 7, wherein the scaly bright pigment (B) is one or more selected from the group consisting of vapor-deposited metal flake pigments, aluminum flake pigments, and photocoherent pigments.
- Item 9 The glitter pigment dispersion according to Item 8, wherein the scaly glitter pigment (B) contains a vapor-deposited metal flake pigment, and the vapor-deposited metal flake pigment is a vapor-deposited aluminum flake pigment or a vapor-deposited chrome flake pigment.
- the scaly bright pigment (B) contains a photo-interfering pigment, and the photo-interfering pigment is a metal oxide-coated mica pigment, a metal oxide-coated alumina flake pigment, or a metal oxide-coated glass flake pigment, or a metal oxide.
- the bright pigment dispersion according to Item 8 which contains a coated silica flake pigment.
- Item 11 Item 1 to any one in which the content of the sulfonic acid-modified cellulose nanofiber (C) is in the range of 2 to 60 parts by mass with reference to 100 parts by mass of the solid content in the bright pigment dispersion.
- the content of the sulfonic acid-modified cellulose nanofiber (C) is in the range of 3 to 50 parts by mass, preferably 5 to 45 parts by mass, based on 100 parts by mass of the solid content in the bright pigment dispersion.
- Item 2. The bright pigment dispersion according to any one of Items 1 to 10, which is within the range of.
- Item 13 The bright pigment dispersion according to any one of Items 1 to 12, wherein the sulfur content in the sulfonic acid-modified cellulose nanofiber (C) is in the range of 0.42 mmol / g to 3.0 mmol / g. ..
- Item 14 The brilliance according to any one of Items 1 to 13, wherein the content of the water (D) is in the range of 50 to 95 parts by mass with respect to 100 parts by mass of all the components of the brilliant pigment dispersion. Sex pigment dispersion.
- the content of the water (D) is in the range of 60 to 90 parts by mass, preferably in the range of 75 to 90 parts by mass with respect to 100 parts by mass of all the components of the bright pigment dispersion.
- Item 2. The bright pigment dispersion according to any one of Items 1 to 13.
- Item 16 The bright pigment dispersion according to any one of Items 1 to 15, which contains the resin water dispersion (E).
- the resin water dispersion (E) is at least one selected from the group consisting of a urethane resin water dispersion, an acrylic resin water dispersion, a polyester resin water dispersion, an olefin resin water dispersion, and a composite of these resins.
- the content of the resin water dispersion (E) is in the range of 1 to 60 parts by mass, preferably in the range of 5 to 40 parts by mass with respect to 100 parts by mass of all the components of the bright pigment dispersion.
- Item 6. The bright pigment dispersion according to Item 16 or 17.
- Step (1) A step of applying a colored paint (X) on an object to be coated to form a colored coating film.
- Step (2) A step of coating the colored coating film with the glittering pigment dispersion according to any one of Items 1 to 18 to form a glittering coating film.
- Step (3) A step of applying a clear paint (Z) on the brilliant coating film to form a clear coating film, and
- Step (4) The colored coating film formed in the step (1), the brilliant coating film formed in the step (2), and the clear coating film formed in the step (3) are separately or.
- a method for forming a multi-layer coating film which comprises a step of curing by heating at the same time.
- Item 20 The method for forming a multi-layer coating film according to Item 19, wherein the film thickness of the brilliant coating film is in the range of 0.025 to 5 ⁇ m.
- Item 21 The method for forming a multi-layer coating film according to Item 19 or 20, wherein the film thickness of the brilliant coating film is in the range of 0.15 to 3 ⁇ m.
- Item 22 A step of applying a transparent base paint (W) on the colored coating film to form a base coating film is further provided between the steps (1) and (2).
- Item 2. The method for forming a multi-layer coating film according to any one of Items 19 to 21, wherein the step (2) is a step of coating a bright pigment dispersion on a base coating film to form a bright coating film.
- the remaining monomer emulsion was dropped into a reaction vessel kept at the same temperature for 3 hours, and after aging for 1 hour after the completion of the dropping, 40 parts of a 5% 2- (dimethylamino) ethanol aqueous solution was placed in the reaction vessel.
- the mixture was gradually added and cooled to 30 ° C., and discharged while being filtered through a 100-mesh nylon cloth to obtain an acrylic resin aqueous dispersion (E-1) having a solid content concentration of 45%.
- the obtained acrylic resin aqueous dispersion (E-1) had a hydroxyl value of 43 mgKOH / g and an acid value of 12 mgKOH / g.
- Monomer emulsion 50 parts of deionized water, 10 parts of styrene, 40 parts of methyl methacrylate, 35 parts of ethyl acrylate, 3.5 parts of n-butyl methacrylate, 10 parts of 2-hydroxyethyl methacrylate, 1.5 parts of acrylic acid, "Aqualon" 1.0 part of KH-10 and 0.03 part of ammonium persulfate were mixed and stirred to obtain a monomer emulsion.
- the remaining monomer emulsion (1) was dropped into a reaction vessel kept at the same temperature over 3 hours, and aged for 1 hour after the completion of the dropping.
- the following monomer emulsion (2) was added dropwise over 1 hour, and after aging for 1 hour, 40 parts of a 5% dimethylethanolamine aqueous solution was gradually added to the reaction vessel and cooled to 30 ° C. to cool 100 mesh nylon.
- the mixture was discharged while being filtered with a cloth to obtain an acrylic resin aqueous dispersion (E-2) having a solid content concentration of 30%.
- the obtained acrylic resin aqueous dispersion (E-2) had a hydroxyl value of 25 mgKOH / g and an acid value of 33 mgKOH / g.
- Monomer emulsion (1) 42 parts of deionized water, 0.72 parts of "Aqualon KH-10", 2.1 parts of methylenebisacrylamide, 2.8 parts of styrene, 16.1 parts of methyl methacrylate, 28 parts of ethyl acrylate and 21 parts of n-butyl acrylate were mixed and stirred to obtain a monomer emulsion (1).
- Monomer emulsion (2) 18 parts of deionized water, 0.31 part of "Aqualon KH-10", 0.03 part of ammonium persulfate, 5.1 part of methacrylic acid, 5.1 part of 2-hydroxyethyl acrylate, 3 parts of styrene. Parts, 6 parts of methyl methacrylate, 1.8 parts of ethyl acrylate and 9 parts of n-butyl acrylate were mixed and stirred to obtain a monomer emulsion (2).
- hydroxyl group-containing polyester resin (R-3) solution having a solid content of 70% was obtained.
- the obtained hydroxyl group-containing polyester resin (R-3) had an acid value of 46 mgKOH / g, a hydroxyl value of 150 mgKOH / g, and a number average molecular weight of 1400.
- Production Example 6 of Manufacturing Pigment Dispersion Liquid (P-1) 10.6 parts (solid content 5.8 parts) of the hydroxyl group-containing acrylic resin (R-1) solution obtained in Production Example 1, 11.6 parts of deionized water, "Surfinol 104A” (trade name, manufactured by Ebony Industries) Defoamer, solid content 50%) 0.2 parts (solid content 0.1 parts), and "Varifine BF-20” (trade name, manufactured by Sakai Chemical Industry Co., Ltd., barium sulfate powder, average particle size 0. 03 ⁇ m) 8.1 parts (solid content 8.1 parts) were mixed.
- the obtained mixed solution was placed in a wide-mouthed glass bottle, glass beads having a diameter of about 1.3 mm ⁇ were added as a dispersion medium, sealed, and dispersed with a paint shaker for 1 hour to disperse the extender pigment dispersion (P-1).
- Production Example 7 of Production of White Pigment Dispersion Liquid (P-2) 56 parts (solid content 25 parts) of the hydroxyl group-containing polyester resin (R-2) solution obtained in Production Example 4, 100 parts of "JR-806" (trade name, manufactured by Teika Co., Ltd., rutyl-type titanium dioxide), "carbon MA”.
- Example 1 of Production of Glittering Pigment Dispersion In a stirring and mixing container, 24.6 parts of distilled water, "Dynol-604" (trade name, manufactured by Ebonic Industries, Inc., acetylene diol-based surface conditioner, 100% solid content) 0.3 part (solid content 0.3 part) , “Hydrosine WS-3001” (trade name, aqueous vaporized aluminum flake pigment, manufactured by Eckart, solid content: 10%, internal solvent: isopropanol, average particle diameter D50: 13 ⁇ m, thickness: 0.05 ⁇ m, surface silica 12.1 parts (solid content 1.2 parts), sulfonic acid-modified cellulose nanofiber dispersion liquid (C-1) (sulfur content 0.97 mmol / g, degree of polymerization 404, average fiber width 20 nm or less) , Water dispersion with 1% solid content) 51.0 parts (solid content 0.5 part), 2.4 parts of acrylic resin aqueous dispersion (E-2)
- Comparative Example 7 Commercially available "WBC-713T No. 1F7" (trade name, manufactured by Kansai Paint Co., Ltd., acrylic melamine resin-based water-based base coat paint, silver coating color, solid content 23%, sulfonic acid) as a bright pigment dispersion (Y-15) Acid-modified cellulose nanofibers are not used).
- Viscosity stability of the paint 320 g of the obtained brilliant pigment dispersion was prepared, of which 20 g was allowed to stand at a temperature of 23 ° C. for 6 hours, and then the temperature was increased by a rheometer (Thermo Fisher Scientific Co., Ltd., HAAKE RS150). The viscosity at 23 ° C. and a shear rate of 0.1 (s-1) was measured (viscosity before stirring). The remaining 300 g of the bright pigment dispersion was transferred to a 500 mL beaker, and the inside of the beaker was stirred up and down to make it uniform, and then stirred at a temperature of 23 ° C. and 1000 rpm for 24 hours using a magnetic stirrer.
- the mouth of the beaker was sealed with a parafilm to prevent evaporation of water during stirring.
- the glittering pigment dispersion stirred for 24 hours was allowed to stand at a temperature of 23 ° C. for 6 hours, and then measured by a leometer (Thermo Fisher Scientific Co., Ltd., HAAKE RS150) at a temperature of 23 ° C. and a shear rate of 0.1 (s).
- the viscosity in -1) was measured (viscosity after stirring).
- the viscosity change rate (%) at a shear rate of 0.1 (s-1) was calculated from the following formula, and the viscosity stability was evaluated according to the following criteria. B or above is a pass.
- Viscosity change rate Is 70% or more.
- the evaluation results are also shown in Table 1.
- the bright pigment dispersions of Examples 1 to 8 are excellent in viscosity stability, whereas they do not contain sulfonic acid-modified cellulose nanofibers and contain a viscosity modifier other than the sulfonic acid-modified cellulose nanofibers (C).
- the bright pigment dispersions of Examples 1 to 6 had low viscosity stability.
- the bright pigment dispersion (Y-15) of Comparative Example 7 is a commercially available product that does not use cellulose nanofibers and has a high solid content, so that the viscosity stability of the paint is good.
- Colored paint (X-1): "TP-65 dark gray” (trade name, manufactured by Kansai Paint Co., Ltd., polyester resin solvent intermediate coating paint, L * value of the obtained coating film: 20) was used as a colored paint (X-1).
- Colored paint (X-2): "TP-65” (trade name, manufactured by Kansai Paint Co., Ltd., polyester resin solvent intermediate coating paint, L * value of the obtained coating film: 85) is used as a colored paint (X-2). ).
- Preparation of clear paint (Z) Clear paint (Z-1) "KINO6510” (trade name: Kansai Paint Co., Ltd., hydroxyl group / isocyanate group curable acrylic resin / urethane resin two-component organic solvent type paint) was used as the clear paint (Z-1).
- Example 9 The above 1.
- the colored paint (X-1) was electrostatically coated on the object to be coated prepared in 1. using a rotary atomization type bell-shaped coating machine so that the cured film thickness was 25 ⁇ m, and heated at 140 ° C. for 30 minutes. And cross-linked and cured to form a colored coating film.
- the transparent base paint (W-1) prepared in Production Example 8 was electrostatically coated on the colored coating film using a rotary atomization type bell-shaped coating machine so as to have a cured film thickness of 25 ⁇ m. It was left for 2 minutes to form an uncured base coating.
- the bright pigment dispersion (Y-1) prepared in Example 1 was placed on a robot bell manufactured by ABB Ltd. under the conditions of a booth temperature of 23 ° C. and a humidity of 68%. , The dry coating film was coated so that the film thickness was 1.0 ⁇ m. It was left for 3 minutes and then preheated at 80 ° C. for 3 minutes to form a brilliant coating.
- the clear paint (Z-1) was applied onto the uncured brilliant coating film using a robot bell manufactured by ABB Ltd. under the conditions of a booth temperature of 23 ° C. and a humidity of 68%, and the film thickness of the dry coating film was increased.
- a clear coating film was formed by painting so as to have a thickness of 35 ⁇ m. After painting, it was left at room temperature for 7 minutes and then heated at 140 ° C. for 30 minutes using a hot air circulation type drying furnace to simultaneously dry the multi-layer coating film to obtain a test plate.
- Example 15 The above 1.
- the colored paint (X-3) was electrostatically coated on the object to be coated prepared in 1 using a rotary atomization type bell-shaped coating machine so that the cured film thickness was 25 ⁇ m, and left for 3 minutes to be uncured. A colored coating film was formed.
- the bright pigment dispersion (Y-2) prepared in Example 2 was placed on a robot bell manufactured by ABB Ltd. under the conditions of a booth temperature of 23 ° C. and a humidity of 68%. , The dry coating film was coated so that the film thickness was 1.0 ⁇ m. It was left for 3 minutes and then preheated at 80 ° C. for 3 minutes to form a brilliant coating.
- the clear paint (Z-1) was applied onto the uncured brilliant coating film using a robot bell manufactured by ABB Ltd. under the conditions of a booth temperature of 23 ° C. and a humidity of 68%, and the film thickness of the dry coating film was increased.
- a clear coating film was formed by painting so as to have a thickness of 35 ⁇ m. After painting, it was left at room temperature for 7 minutes and then heated at 140 ° C. for 30 minutes using a hot air circulation type drying furnace to simultaneously dry the multi-layer coating film to obtain a test plate.
- Example 16 and Comparative Example 14 A test plate was obtained in the same manner as in Example 15 except that the paints and film thicknesses shown in Table 2 were used.
- Bright area Sa Bright area Sa (75 °) A CCD chip that images the measurement target surface is placed in a direction perpendicular to the plane direction of the measurement target surface, and the CCD is exposed to light emitted from an angle of 75 ° with respect to the vertical direction.
- the bright area Sa (75 °) was calculated by taking an image with the chip and analyzing the obtained image with an image analysis algorithm using a histogram of the brightness level.
- a multi-angle colorimeter manufactured by BYK, trade name, BYK-mac i was used for the measurement. The lower the value, the better.
- 60 ° mirror gloss 60 ° gloss
- the 60 ° gloss value of the test plate obtained above was measured using a gloss meter (micro-TRI-gloss, manufactured by BYK-Gardner). The higher the value, the better.
- Table 2 shows the results of the coating film evaluation.
- the multi-layer coating films of Examples 9 and 10 had better bright areas Sa and 60 ° gloss as compared with the multi-layer coating films of Comparative Examples 8 and 10.
- the multi-layer coating film of Examples 11 and 12 had a better bright area Sa and / or 60 ° gloss as compared with the multi-layer coating film of Comparative Examples 9 and 11.
- the multi-layer coating film of Example 13 had a better bright area Sa and 60 ° gloss than the multi-layer coating film of Comparative Example 12.
- the multi-layer coating film of Example 14 had a better bright area Sa and 60 ° gloss than the multi-layer coating film of Comparative Example 13.
- the multi-layer coating film of Example 15 has the same bright pigment dispersion (Y-2) as the multi-layer coating film of Example 10, and does not have the composition of the coloring paint (X-3) and the base paint (W). Although the points were different from the multi-layer coating film of Example 10, the bright area Sa and the 60 ° gloss were both good.
- the multi-layer coating film of Example 16 has a composition of the bright pigment dispersion (Y-7) similar to that of the bright pigment dispersion (Y-5) of Example 13, but has a bright area Sa and a bright area Sa. All 60 ° glosses were good.
- the multi-layer coating film of Example 17 contains primal ASE-60, which is a polyacrylic acid-based viscosity adjusting agent, in addition to the sulfonic acid-modified cellulose nanofibers, as the viscosity adjusting agent of the bright pigment dispersion (Y-8). These points are different from the multi-layer coating films of Examples 1 and 2, and the bright area Sa and the 60 ° gloss are slightly inferior to those of the multi-layer coating films of Examples 1 and 2, but both are good. rice field.
- the multi-layer coating film of Example 18 has a different clear paint (Z-2) from the multi-layer coating film of Example 10, and has a better bright area Sa than the multi-layer coating film of Example 10, 60. ° The gloss value was low.
- the multi-layer coating film of Comparative Example 14 was produced by using the bright pigment dispersion (Y-15) of Comparative Example 7. Manufactured with a standard film thickness of 15 ⁇ m for the brilliant pigment dispersion (Y-15), but with a 60 ° gloss compared to Examples 11 and 12 and Comparative Examples 9 and 11 using aluminum flake pigments. The value was low. Since the bright pigment dispersion (Y-15) has a high solid content, it is difficult to coat it with a thin film.
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Abstract
Description
前記光輝性顔料分散体の全成分合計100質量部に対して、固形分を0.1~10質量部含む光輝性顔料分散体。
工程(2):該着色塗膜上に、項1~7のいずれか1項に記載の光輝性顔料分散体を塗装して、光輝性塗膜を形成する工程、
工程(3):該光輝性塗膜上に、クリヤ塗料(Z)を塗装してクリヤ塗膜を形成する工程、ならびに、
工程(4):前記工程(1)で形成された着色塗膜、前記工程(2)で形成された光輝性塗膜、及び、前記工程(3)で形成されたクリヤ塗膜を別々に又は同時に加熱することにより、硬化させる工程を含む複層塗膜形成方法。
本発明の光輝性顔料分散体における湿潤剤(A)としては、被塗物への光輝性顔料分散体の塗装時に、該光輝性顔料分散体を被塗物上に一様に配向するのを支援する効果のある材料であれば特に制限なく使用することができる。
本発明の光輝性顔料分散体における鱗片状光輝性顔料(B)としては、例えば、蒸着金属フレーク顔料、アルミニウムフレーク顔料、光干渉性顔料等を挙げることができる。これらの顔料は得られる塗膜に求められる質感によって1種又は2種以上を適宜選択して用いることができる。金属調光沢に優れた塗膜を得る観点では、蒸着金属フレーク顔料、アルミニウムフレーク顔料が好適である。一方、真珠調光沢に優れた塗膜を得る観点では、光干渉性顔料が好適である。
本発明において、スルホン酸変性セルロースナノファイバー(C)は、パルプなどのセルロースを含む繊維原料であるセルロース原料がナノメートルレベルまで微細化されたものであって、セルロースナノファイバーを構成するセルロース(D-グルコースがβ(1→4)グリコシド結合した鎖状の高分子)の水酸基(-OH基)の少なくとも一部が下記式(1)で示されるスルホ基でスルホン酸変性されたものである。
(ここで、rは、独立した1~3の自然数であり、Zr+は、r=1のとき、水素イオン、アルカリ金属の陽イオン、アンモニウムイオン、脂肪族アンモニウムイオン、芳香族アンモニウムイオンよりなる群から選ばれる少なくとも1種であり、r=2のとき、アルカリ土類金属の陽イオンであり、r=3のとき、多価金属の陽イオンである。式(1)で示されるスルホ基は、r=1であるスルホ基、r=2であるスルホ基、r=3であるスルホ基、又はこれらの組み合わせであってもよい。)
(原料)
セルロース原料としては、例えば、植物性材料(例えば、木材、竹、麻、ジュート、ケナフ、農地残廃物、布、パルプ(針葉樹未漂白クラフトパルプ(NUKP)、針葉樹漂白クラフトパルプ(NBKP)、広葉樹未漂白クラフトパルプ(LUKP)、広葉樹漂白クラフトパルプ(LBKP)、針葉樹未漂白サルファイトパルプ(NUSP)、針葉樹漂白サルファイトパルプ(NBSP)、サーモメカニカルパルプ(TMP)、再生パルプ、古紙等)、動物性材料(例えば、ホヤ類)、藻類、微生物(例えば、酢酸菌(アセトバクター))、微生物産生物を起源とするものを挙げることができ、いずれも使用することができる。好ましくは、セルロース原料は植物又は微生物由来のセルロース原料であり、より好ましくは、植物由来のセルロース原料である。
スルホン酸変性セルロースナノファイバー(C)におけるスルホ基の含有量は、スルホ基に起因する硫黄含有量で表すことができ、その含有量はとくに限定されないが、スルホン酸変性セルロースナノファイバー(C)の分散性、透明性及び光輝性顔料分散体におけるスルホン酸変性セルロースナノファイバー(C)のシェアに対する安定性の観点から、スルホン酸変性セルロースナノファイバー(C)1g(質量)あたりの硫黄含有量は、0.42mmol/g~3.0mmol/gであることが好ましく、0.5mmol/g~3.0mmol/gであることがより好ましく、0.5mmol/g~2.0mmol/gであることがさらに好ましく、0.5mmol/g~1.5mmol/gであることが特に好ましい。
スルホン酸変性セルロースナノファイバー(C)の平均繊維長は、重合度で間接的に表すことができる。
スルホン酸変性セルロースナノファイバー(C)の平均繊維幅は、水系溶媒に分散させた際に透明性を得やすい太さであれば、とくに限定されないが、スルホン酸変性セルロースナノファイバー(C)の取り扱い性及び透明性の観点から、1nm~1000nmとなるように調製するのが好ましく、より好ましくは2nm~100nmであり、さらに好ましくは2nm~20nmである。
スルホン酸変性セルロースナノファイバー(C)の製造方法は、公知の方法により製造することができる。具体的には、例えば、セルロース原料を化学的に処理してスルホ基を導入する化学処理工程と、該化学処理工程で得られたスルホン酸変性パルプ繊維を微細化する微細化処理工程とにより得ることができる。
本発明の光輝性顔料分散体は、(A)湿潤剤、(B)鱗片状光輝性顔料、(C)スルホン酸変性セルロースナノファイバー及び(D)水を含有する光輝性顔料分散体であって、前記光輝性顔料分散体の全成分合計100質量部に対して、固形分を0.1~10質量部含む光輝性顔料分散体である。
樹脂水分散体(E)としては、樹脂が水性溶媒に分散されているもので、例えば、ウレタン樹脂水分散体、アクリル樹脂水分散体、ポリエステル樹脂水分散体、オレフィン樹脂水分散体及びこれらの樹脂の複合体からなる群から選択される少なくとも一種を含有することができる。該水分散体は変性されていてもよい。
光輝性顔料分散体には、さらに必要に応じて、有機溶剤、前記鱗片状光輝性顔料(B)以外の顔料、スルホン酸変性セルロースナノファイバー(C)以外の粘性調整剤、樹脂水分散体(E)以外のバインダー樹脂、架橋性成分、顔料分散剤、沈降防止剤、紫外線吸収剤及び光安定剤等を適宜配合しても良い。
本発明の光輝性顔料分散体が上記架橋性成分を含有する場合、その含有量は、得られる塗膜の耐水性等の点から、本発明の光輝性顔料分散体中の鱗片状光輝性顔料(B)の含有量100質量部を基準として、固形分として1~100質量部の範囲内であることが好ましく、5~95質量部の範囲内であることがより好ましく、10~90質量部の範囲内であることがさらに好ましい。
本発明の光輝性顔料分散体は、得られる塗膜の金属又は真珠調光沢の観点から、回転数が6回転/分(6rpm)の条件における粘度が、100~10000mPa・sec、好ましくは200~8000mPa・sec、さらに好ましくは300~6000mPa・secの範囲内であることが好適である。
本発明の複層塗膜形成方法は、
工程(1):被塗物上に、着色塗料(X)を塗装して、着色塗膜を形成する工程、
工程(2):該着色塗膜上に、本発明の光輝性顔料分散体を塗装して、光輝性塗膜を形成する工程、
工程(3):該光輝性塗膜上に、クリヤ塗料(Z)を塗装してクリヤ塗膜を形成する工程、ならびに、
工程(4):前記工程(1)で形成された着色塗膜、前記工程(2)で形成された光輝性塗膜、及び、前記工程(3)で形成されたクリヤ塗膜を別々に又は同時に加熱することにより、硬化させる工程を含む複層塗膜形成方法である。
本発明の複層塗膜は、以下に示す被塗物上に形成される。
着色塗料(X)としては、具体的には、基体樹脂、架橋剤、顔料ならびに有機溶剤及び/又は水等の溶媒を主成分とするそれ自体既知の熱硬化性塗料を使用することができる。上記熱硬化性塗料としては、例えば中塗り塗料及びベース塗料等が挙げられる。
透明であってもよいベース塗料(W)(以下単に「ベース塗料(W)」と称することがある)としては、それ自体既知の塗料組成物を使用することができる。特に、ベース塗料(W)として、自動車車体などを塗装する場合に通常用いられる塗料組成物を使用することが好適である。
ベース塗料(W)が透明塗料である場合には、必要に応じて体質顔料を含有することができる。体質顔料としては、例えば、硫酸バリウム、炭酸バリウム、炭酸カルシウム、ケイ酸アルミニウム、シリカ、炭酸マグネシウム、タルク、アルミナホワイトなどを挙げることができる。
本発明の光輝性顔料分散体は、静電塗装、エアスプレー、エアレススプレーなどの方法で塗装することができる。これらの塗装方法は、必要に応じて、静電印加してもよい。本発明の複層塗膜形成方法においては、特に回転霧化式の静電塗装が好ましい。
クリヤ塗料(Z)は、公知の熱硬化性クリヤ塗料組成物をいずれも使用できる。該熱硬化性クリヤ塗料組成物としては、例えば、架橋性官能基を有する基体樹脂及び硬化剤を含有する有機溶剤型熱硬化性塗料組成物、水性熱硬化性塗料組成物、粉体熱硬化性塗料組成物等を挙げることができる。
水酸基含有樹脂としては、水酸基を含有するものであれば従来公知の樹脂が制限なく使用できる。該水酸基含有樹脂としては例えば、水酸基含有アクリル樹脂、水酸基含有ポリエステル樹脂、水酸基含有ポリエーテル樹脂、水酸基含有ポリウレタン樹脂などを挙げることができ、好ましいものとして、水酸基含有アクリル樹脂、水酸基含有ポリエステル樹脂を挙げることができ、特に好ましいものとして水酸基含有アクリル樹脂を挙げることができる。
ポリイソシアネート化合物は、1分子中に少なくとも2個のイソシアネート基を有する化合物であって、例えば、脂肪族ポリイソシアネート、脂環族ポリイソシアネート、芳香脂肪族ポリイソシアネート、芳香族ポリイソシアネート、該ポリイソシアネートの誘導体などを挙げることができる。
前記光輝性顔料分散体の全成分合計100質量部に対して、固形分を0.1~10質量部含む光輝性顔料分散体。
工程(2):該着色塗膜上に、項1~18のいずれか1項に記載の光輝性顔料分散体を塗装して、光輝性塗膜を形成する工程、
工程(3):該光輝性塗膜上に、クリヤ塗料(Z)を塗装してクリヤ塗膜を形成する工程、ならびに、
工程(4):前記工程(1)で形成された着色塗膜、前記工程(2)で形成された光輝性塗膜、及び、前記工程(3)で形成されたクリヤ塗膜を別々に又は同時に加熱することにより、硬化させる工程を含む複層塗膜形成方法。
工程(2)は、ベース塗膜上に、光輝性顔料分散体を塗装して光輝性塗膜を形成する工程である項19~21のいずれか1項に記載の複層塗膜形成方法。
脱脂及びりん酸亜鉛処理した鋼板(JISG3141、大きさ400mm×300mm×0.8mm)にカチオン電着塗料「エレクロンGT-10」(商品名:関西ペイント株式会社製、エポキシ樹脂ポリアミン系カチオン樹脂に硬化剤としてブロックポリイソシアネート化合物を使用したもの)を硬化塗膜に基づいて膜厚が20μmになるように電着塗装し、170℃で20分加熱して架橋硬化させ、電着塗膜を形成せしめ、被塗物とした。
水酸基含有アクリル樹脂(R-1)の製造
製造例1
温度計、サーモスタット、撹拌装置、還流冷却器、窒素導入管及び滴下装置を備えた反応容器にプロピレングリコールモノプロピルエーテル35部を仕込み85℃に昇温後、メチルメタクリレート32部、n-ブチルアクリレート27.7部、2-エチルヘキシルアクリレート20部、4-ヒドロキシブチルアクリレート10部、ヒドロキシプロピルアクリレート3部、アクリル酸6.3部、2-アクリロイルオキシエチルアシッドフォスフェート1部、プロピレングリコールモノプロピルエーテル15部及び2,2’-アゾビス(2,4-ジメチルバレロニトリル)2.3部の混合物を4時間かけて滴下し、滴下終了後1時間熟成した。その後さらにプロピレングリコールモノプロピルエーテル10部及び2,2’-アゾビス(2,4-ジメチルバレロニトリル)1部の混合物を1時間かけて滴下し、滴下終了後1時間熟成した。さらにジエタノールアミン7.4部を加え、固形分55%の水酸基含有アクリル樹脂(R-1)溶液を得た。得られた水酸基含有アクリル樹脂(R-1)は酸価が51mgKOH/g、水酸基価が52mgKOH/gであった。
製造例2
温度計、サーモスタット、撹拌装置、還流冷却器及び滴下装置を備えた反応容器に、脱イオン水70.7部及び「アクアロンKH-10」(商品名、第一工業製薬株式会社製、乳化剤、有効成分97%)0.52部を仕込み、窒素気流中で撹拌混合し、80℃に昇温した。次いで、下記のモノマー乳化物のうちの全量の1%量及び6%過硫酸アンモニウム水溶液5部を反応容器内に導入し80℃で15分間保持した。その後、残りのモノマー乳化物を3時間かけて、同温度に保持した反応容器内に滴下し、滴下終了後1時間熟成した後、5%2-(ジメチルアミノ)エタノール水溶液40部を反応容器に徐々に加えながら30℃まで冷却し、100メッシュのナイロンクロスで濾過しながら排出し、固形分濃度45%のアクリル樹脂水分散体(E-1)を得た。得られたアクリル樹脂水分散体(E-1)の水酸基価は43mgKOH/g、酸価は12mgKOH/gであった。
製造例3
温度計、サーモスタット、撹拌器、還流冷却器及び滴下装置を備えた反応容器に、脱イオン水130部及び「アクアロンKH-10」0.52部を仕込み、窒素気流中で撹拌混合し、80℃に昇温した。次いで下記のモノマー乳化物(1)のうちの全量の1%量及び6%過硫酸アンモニウム水溶液5.3部を反応容器内に導入し80℃で15分間保持した。その後、残りのモノマー乳化物(1)を3時間かけて、同温度に保持した反応容器内に滴下し、滴下終了後1時間熟成を行なった。その後、下記のモノマー乳化物(2)を1時間かけて滴下し、1時間熟成した後、5%ジメチルエタノールアミン水溶液40部を反応容器に徐々に加えながら30℃まで冷却し、100メッシュのナイロンクロスで濾過しながら排出し、固形分濃度30%のアクリル樹脂水分散体(E-2)を得た。得られたアクリル樹脂水分散体(E-2)は、水酸基価が25mgKOH/g、酸価が33mgKOH/gであった。
製造例4
温度計、サーモスタット、攪拌装置、還流冷却器及び水分離器を備えた反応容器に、トリメチロールプロパン174部、ネオペンチルグリコール327部、アジピン酸352部、イソフタル酸109部及び1,2-シクロヘキサンジカルボン酸無水物101部を仕込み、160℃から230℃まで3時間かけて昇温させた後、生成した縮合水を水分離器により留去させながら230℃で保持し、酸価が3mgKOH/g以下となるまで反応させた。この反応生成物に、無水トリメリット酸59部を添加し、170℃で30分間付加反応を行った後、50℃以下に冷却し、2-(ジメチルアミノ)エタノールを酸基に対して当量添加し中和してから、脱イオン水を徐々に添加することにより、固形分濃度45%、pH7.2の水酸基含有ポリエステル樹脂(R-2)溶液を得た。得られた水酸基含有ポリエステル樹脂(R-2)は、水酸基価が128mgKOH/g、酸価が35mgKOH/g、重量平均分子量が13000であった。
製造例5
温度計、サーモスタット、攪拌装置、還流冷却器及び水分離器を備えた反応容器に、トリメチロールプロパン109部、1,6-ヘキサンジオール141部、1,2-シクロヘキサンジカルボン酸無水物126部及びアジピン酸120部を仕込み、160℃から230℃迄3時間かけて昇温させた後、230℃で4時間縮合反応させた。次いで、得られた縮合反応生成物に、カルボキシル基を導入するために、無水トリメリット酸38.3部を加えて、170℃で30分間反応させた後、2-エチル-1-ヘキサノールで希釈し、固形分70%の水酸基含有ポリエステル樹脂(R-3)溶液を得た。得られた水酸基含有ポリエステル樹脂(R-3)は、酸価が46mgKOH/g、水酸基価が150mgKOH/g、数平均分子量が1400であった。
製造例6
製造例1で得た水酸基含有アクリル樹脂(R-1)溶液10.6部(固形分5.8部)、脱イオン水11.6部、「サーフィノール104A」(商品名、エボニックインダストリーズ社製消泡剤、固形分50%)0.2部(固形分0.1部)、及び「バリファインBF-20」(商品名、堺化学工業株式会社製、硫酸バリウム粉末、平均粒子径0.03μm)8.1部(固形分8.1部)を混合した。次いで、得られた混合液を広口ガラスビン中に入れ、分散メジアとして直径約1.3mmφのガラスビーズを加えて密封し、ペイントシェイカーにて1時間分散して、体質顔料分散液(P-1)を得た。
製造例7
製造例4で得た水酸基含有ポリエステル樹脂(R-2)溶液56部(固形分25部)、「JR-806」(商品名、テイカ株式会社製、ルチル型二酸化チタン)100部、「カーボンMA-100」(商品名、三菱化学株式会社製、カーボンブラック)0.03部、「バリエースB-35」(商品名、堺化学工業株式会社製、硫酸バリウム粉末)15部、「MICRO ACE S-3」(商品名、日本タルク株式会社製、タルク粉末)3部及び脱イオン水5部を混合し、2-(ジメチルアミノ)エタノールでpH8.0に調整した。次いで、得られた混合液を広口ガラスビン中に入れ、分散メジアとして直径約1.3mmφのガラスビーズを加えて密封し、ペイントシェイカーにて30分間分散して、白色顔料分散液(P-2)を得た。
製造例8
攪拌混合容器に、製造例6で得た体質顔料分散液(P-1)30.5部、製造例3で得たアクリル樹脂水分散体(E-2)133.3部(固形分40部)、製造例5で得た水酸基含有ポリエステル樹脂(R-3)溶液32.9部(固形分23部)、「ユーコートUX-310」(商品名、三洋化成株式会社製、ウレタン樹脂水分散体、固形分含有率40%)25部(固形分10部)、及び「サイメル251」(商品名、日本サイテックインダストリーズ社製、メラミン樹脂、固形分含有率80%)33.4部(固形分27部)となるように添加して攪拌混合し、透明ベース塗料(W-1)を調製した。
製造例9
製造例7で得た白色顔料分散液(P-2)179.03部、製造例2で得たアクリル樹脂水分散体(E-1)44.4部(固形分20部)、「バイヒジュールVPLS2310」(商品名、住化バイエルウレタン株式会社製、ブロック化ポリイソシアネート化合物、固形分38%)78部(固形分30部)及び「ユーコートUX-8100」(商品名、三洋化成工業株式会社製、ウレタンエマルション、固形分35%)72部(固形分25部)を添加して攪拌混合し、白色ベース塗料(W-2)を調製した。
実施例1
攪拌混合容器に、蒸留水24.6部、「Dynol-604」(商品名、エボニックインダストリーズ社製、アセチレンジオール系表面調整剤、固形分100%)0.3部(固形分0.3部)、「Hydroshine WS-3001」(商品名、水性用蒸着アルミニウムフレーク顔料、Eckart社製、固形分:10%、内部溶剤:イソプロパノール、平均粒子径D50:13μm、厚さ:0.05μm、表面がシリカ処理されている)12.1部(固形分1.2部)、スルホン酸変性セルロースナノファイバー分散液(C-1)(硫黄含有量0.97mmol/g、重合度404、平均繊維幅20nm以下、固形分1%の水分散液)51.0部(固形分0.5部)、製造例3で得たアクリル樹脂水分散体(E-2)2.4部(固形分0.7部)、「TINUVIN 479-DW(N)」(商品名、BASF社製、紫外線吸収剤、固形分40%)0.3部(固形分0.1部)、「TINUVIN 123-DW(N)」(商品名、BASF社製、光安定剤、固形分50%)0.2部(固形分0.1部)、2-エチルヘキサノール0.5部及びイソプロピルアルコール8.5部を添加して攪拌混合し、光輝性顔料分散体(Y-1)を調整した。得られた光輝性顔料分散体(Y-1)の固形分は2.9%であり、塗料粘度「B6値」は860mPa・sであった。
表1に記載の配合とする以外は全て実施例1と同様にして光輝性顔料分散体(Y-2)~(Y-14)を得た。
(*2)「Xirallic T61-10 Micro Silver」:商品名、メルク株式会社製、固形分100%、酸化チタン被覆アルミナフレーク顔料、平均粒子径11.8μm、
(*3)「Xirallic T60-10 Crystal Silver」:商品名、メルク株式会社製、固形分100%、酸化チタン被覆アルミナフレーク顔料、平均粒子径18.5μm、
(*4)スルホン酸変性セルロースナノファイバー分散液(C-2):硫黄含有量0.56mmol/g、重合度408、平均繊維幅20nm以下、固形分1%の水分散液、
(*5)「プライマル ASE-60」:商品名、ダウケミカル社製、ポリアクリル酸系粘性調整剤、固形分28%の水分散液、
(*6)「レオクリスタ」:商品名、第一工業製薬株式会社製、カルボン酸変性セルロースナノファイバー、固形分2%の水分散液、
(*7)リン酸基含有セルロースナノファイバー分散液:数平均繊維径4nm、リン酸基導入量が1.50mmol/g、固形分濃度2%の水分散液。
光輝性顔料分散体(Y-15)として、市販の「WBC-713T No.1F7」(商品名、関西ペイント株式会社製、アクリルメラミン樹脂系水性ベースコート塗料、シルバー塗色、固形分23%、スルホン酸変性セルロースナノファイバー不使用)を使用した。
得られた光輝性顔料分散体を320g用意し、このうち20gは温度23℃で6時間静置した後、レオメーター(サーモフィッシャーサイエンティフィック株式会社、HAAKE RS150)により、温度23℃、せん断速度が0.1(s-1)における粘度を測定した(撹拌前の粘度)。残りの光輝性顔料分散体300gを500mLビーカーに移し、ビーカー内を上下撹拌して均一の状態にしてから、マグネットスターラーを用いて、温度23℃、1000rpmで24時間撹拌した。なお、撹拌時に水の蒸発を防止するためビーカーの口をパラフィルムで密閉した。上記24時間撹拌した光輝性顔料分散体を温度23℃で6時間静置した後、レオメーター(サーモフィッシャーサイエンティフィック株式会社、HAAKE RS150)により、温度23℃、せん断速度が0.1(s-1)における粘度を測定した(撹拌後の粘度)。
A:粘度変化率が30%未満
B:粘度変化率が30%以上40%未満
C:粘度変化率が40%以上60%未満
D:粘度変化率が60%以上70%未満
E:粘度変化率が70%以上。
着色塗料(X-1):「TP-65 ダークグレー」(商品名、関西ペイント株式会社製、ポリエステル樹脂系溶剤中塗り塗料、得られる塗膜のL*値:20)を、着色塗料(X-1)として用いた。
クリヤ塗料(Z)の調製
クリヤ塗料(Z-1)
「KINO6510」(商品名:関西ペイント株式会社、水酸基/イソシアネート基硬化型アクリル樹脂・ウレタン樹脂系2液型有機溶剤型塗料)を、クリヤ塗料(Z-1)として用いた。
「KINO6510」に含まれる樹脂固形分100質量部に対して「PARIOGEN MAROON L3920」(商品名、BASF社製、有機ペリレン顔料)を1.21部添加したものを、クリヤ塗料(Z-2)として用いた。
試験板の作成
実施例9
前記1.で作製した被塗物上に、着色塗料(X-1)を回転霧化型のベル型塗装機を用いて、硬化膜厚25μmになるように静電塗装し、140℃で30分加熱して架橋硬化させ着色塗膜を形成した。
x=sc/sg/S*10000
x:膜厚[μm]
sc:塗着固形分[g]
sg:塗膜比重[g/cm3]
S:塗着固形分の評価面積[cm2]
実施例10~14、17~18及び比較例8~13
表2に記載の塗料、膜厚とする以外は全て実施例1と同様にして試験板を得た。
前記1.で作製した被塗物上に、着色塗料(X-3)を回転霧化型のベル型塗装機を用いて、硬化膜厚25μmになるように静電塗装し、3分間放置し、未硬化の着色塗膜を形成した。
表2に記載の塗料、膜厚とする以外は全て実施例15と同様にして試験板を得た。
上記のようにして得られた各試験板を下記の項目について評価した。
光輝面積Sa(75°):測定対象面の平面方向に対する垂直方向に、該測定対象面を撮像するCCDチップを配置し、該垂直方向に対し75°の角度から照射した光に対し、該CCDチップにて、それぞれ画像を撮り、得られた画像を明るさレベルのヒストグラムを用いた画像解析アルゴリズムで解析することにより、光輝面積Sa(75°)を算出した。測定には、多角度測色器(BYK社製、商品名、BYK-mac i)を使用した。値が低いほうが、良好である。
上記で得られた試験板について、光沢計(micro-TRI-gloss、BYK-Gardner社製)を用いて60°グロス値を測定した。値が高い方が良好である。
Claims (9)
- (A)湿潤剤、(B)鱗片状光輝性顔料、(C)スルホン酸変性セルロースナノファイバー及び(D)水を含有する光輝性顔料分散体であって、
前記光輝性顔料分散体の全成分合計100質量部に対して、固形分を0.1~10質量部含む光輝性顔料分散体。 - 前記湿潤剤(A)の含有量が、前記光輝性顔料分散体中の固形分100質量部を基準として、2~30質量部の範囲内である請求項1に記載の光輝性顔料分散体。
- 前記鱗片状光輝性顔料(B)の含有量が、前記光輝性顔料分散体中の固形分100質量部を基準として、5~85質量部の範囲内である請求項1又は2に記載の光輝性顔料分散体。
- 前記スルホン酸変性セルロースナノファイバー(C)の含有量が、前記光輝性顔料分散体中の固形分100質量部を基準として、2~60質量部の範囲内である請求項1~3のいずれか1項に記載の光輝性顔料分散体。
- 前記スルホン酸変性セルロースナノファイバー(C)中の硫黄含有量が、0.42mmol/g~3.0mmol/gの範囲内である請求項1~4のいずれか1項に記載の光輝性顔料分散体。
- 前記水(D)の含有量が、前記光輝性顔料分散体の全成分合計100質量部に対して、50~95質量部の範囲内である請求項1~5のいずれか1項に記載の光輝性顔料分散体。
- さらに、樹脂水分散体(E)を含有する請求項1~6のいずれか1項に記載の光輝性顔料分散体。
- 工程(1):被塗物上に、着色塗料(X)を塗装して、着色塗膜を形成する工程、
工程(2):該着色塗膜上に、請求項1~7のいずれか1項に記載の光輝性顔料分散体を塗装して、光輝性塗膜を形成する工程、
工程(3):該光輝性塗膜上に、クリヤ塗料(Z)を塗装してクリヤ塗膜を形成する工程、ならびに、
工程(4):前記工程(1)で形成された着色塗膜、前記工程(2)で形成された光輝性塗膜、及び、前記工程(3)で形成されたクリヤ塗膜を別々に又は同時に加熱することにより、硬化させる工程を含む複層塗膜形成方法。 - 前記光輝性塗膜の膜厚が、0.025~5μmの範囲内である請求項8に記載の複層塗膜形成方法。
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