WO2012096331A1 - アルミホイールの塗装方法及びアルミホイール - Google Patents
アルミホイールの塗装方法及びアルミホイール Download PDFInfo
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- WO2012096331A1 WO2012096331A1 PCT/JP2012/050436 JP2012050436W WO2012096331A1 WO 2012096331 A1 WO2012096331 A1 WO 2012096331A1 JP 2012050436 W JP2012050436 W JP 2012050436W WO 2012096331 A1 WO2012096331 A1 WO 2012096331A1
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- Prior art keywords
- coating composition
- mass
- aluminum wheel
- parts
- coating
- Prior art date
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- 238000000576 coating method Methods 0.000 title claims abstract description 76
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 44
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 239000008199 coating composition Substances 0.000 claims abstract description 64
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 58
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- 238000005260 corrosion Methods 0.000 claims abstract description 21
- 239000007787 solid Substances 0.000 claims abstract description 21
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 16
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- 230000009477 glass transition Effects 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 29
- 239000002245 particle Substances 0.000 claims description 21
- 239000000203 mixture Substances 0.000 claims description 17
- 229920000877 Melamine resin Polymers 0.000 claims description 16
- 239000004640 Melamine resin Substances 0.000 claims description 16
- 229920000642 polymer Polymers 0.000 claims description 15
- 239000000377 silicon dioxide Substances 0.000 claims description 14
- 239000011164 primary particle Substances 0.000 claims description 12
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
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- 239000012965 benzophenone Substances 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- RSOILICUEWXSLA-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)N(C)C(C)(C)C1 RSOILICUEWXSLA-UHFFFAOYSA-N 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical compound C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
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- MEZZCSHVIGVWFI-UHFFFAOYSA-N 2,2'-Dihydroxy-4-methoxybenzophenone Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1O MEZZCSHVIGVWFI-UHFFFAOYSA-N 0.000 description 1
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- 239000003480 eluent Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 description 1
- 229940009714 erythritol Drugs 0.000 description 1
- 235000019414 erythritol Nutrition 0.000 description 1
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 1
- CWAFVXWRGIEBPL-UHFFFAOYSA-N ethoxysilane Chemical compound CCO[SiH3] CWAFVXWRGIEBPL-UHFFFAOYSA-N 0.000 description 1
- IAJNXBNRYMEYAZ-UHFFFAOYSA-N ethyl 2-cyano-3,3-diphenylprop-2-enoate Chemical compound C=1C=CC=CC=1C(=C(C#N)C(=O)OCC)C1=CC=CC=C1 IAJNXBNRYMEYAZ-UHFFFAOYSA-N 0.000 description 1
- TUKWPCXMNZAXLO-UHFFFAOYSA-N ethyl 2-nonylsulfanyl-4-oxo-1h-pyrimidine-6-carboxylate Chemical compound CCCCCCCCCSC1=NC(=O)C=C(C(=O)OCC)N1 TUKWPCXMNZAXLO-UHFFFAOYSA-N 0.000 description 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229960004337 hydroquinone Drugs 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- KBJFYLLAMSZSOG-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)aniline Chemical compound CO[Si](OC)(OC)CCCNC1=CC=CC=C1 KBJFYLLAMSZSOG-UHFFFAOYSA-N 0.000 description 1
- KIDSMXQEOGCSGN-UHFFFAOYSA-N n-(3-tripropoxysilylpropyl)aniline Chemical compound CCCO[Si](OCCC)(OCCC)CCCNC1=CC=CC=C1 KIDSMXQEOGCSGN-UHFFFAOYSA-N 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 1
- DXGLGDHPHMLXJC-UHFFFAOYSA-N oxybenzone Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1 DXGLGDHPHMLXJC-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229960000969 phenyl salicylate Drugs 0.000 description 1
- QCDYQQDYXPDABM-UHFFFAOYSA-N phloroglucinol Chemical compound OC1=CC(O)=CC(O)=C1 QCDYQQDYXPDABM-UHFFFAOYSA-N 0.000 description 1
- 229960001553 phloroglucinol Drugs 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 229940085991 phosphate ion Drugs 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- SQCMCIWNVXFWQF-UHFFFAOYSA-N piperidin-4-yl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCNCC1 SQCMCIWNVXFWQF-UHFFFAOYSA-N 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 125000002572 propoxy group Chemical group [*]OC([H])([H])C(C([H])([H])[H])([H])[H] 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 1
- 229960001755 resorcinol Drugs 0.000 description 1
- 150000003902 salicylic acid esters Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- CXVGEDCSTKKODG-UHFFFAOYSA-N sulisobenzone Chemical compound C1=C(S(O)(=O)=O)C(OC)=CC(O)=C1C(=O)C1=CC=CC=C1 CXVGEDCSTKKODG-UHFFFAOYSA-N 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- VJPIFPYWTTUINA-UHFFFAOYSA-N trimethyl 3-(oxiran-2-ylmethoxy)propyl silicate Chemical compound CO[Si](OC)(OC)OCCCOCC1CO1 VJPIFPYWTTUINA-UHFFFAOYSA-N 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- GBNDTYKAOXLLID-UHFFFAOYSA-N zirconium(4+) ion Chemical compound [Zr+4] GBNDTYKAOXLLID-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B19/00—Wheels not otherwise provided for or having characteristics specified in one of the subgroups of this group
-
- 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
- B05D7/16—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 using synthetic lacquers or varnishes
-
- 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
- B05D7/52—Two layers
- B05D7/53—Base coat plus clear coat type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B23/00—Attaching rim to wheel body
- B60B23/04—Attaching rim to wheel body by bayonet joint, screw-thread, or like attachments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B23/00—Attaching rim to wheel body
- B60B23/06—Attaching rim to wheel body by screws, bolts, pins, or clips
- B60B23/10—Attaching rim to wheel body by screws, bolts, pins, or clips arranged axially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
- B60B25/04—Rims with dismountable flange rings, seat rings, or lock rings
- B60B25/14—Locking means for flange rings or seat rings
- B60B25/20—Arrangement of screws, bolts, or shouldered pins
-
- 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
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/08—Homopolymers or copolymers of acrylic acid esters
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
- C09D163/04—Epoxynovolacs
-
- 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
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/34—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides
- C23C22/36—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates
- C23C22/361—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing fluorides or complex fluorides containing also phosphates containing titanium, zirconium or hafnium compounds
-
- 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
- B05D2202/20—Metallic substrate based on light metals
- B05D2202/25—Metallic substrate based on light metals based on Al
-
- 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
- B05D2502/00—Acrylic polymers
-
- 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
- B05D2504/00—Epoxy polymers
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
Definitions
- the present invention relates to an aluminum wheel coating method and an aluminum wheel obtained by the coating method.
- an aluminum wheel is obtained by performing a shot process in which a small piece of metal such as a stainless alloy is struck against an aluminum-based alloy formed by means such as casting or forging, and then cutting a necessary portion.
- the aluminum wheel that has been subjected to such processing is further subjected to chemical conversion treatment, and thereafter, the entire surface or a part thereof is subjected to coating for imparting anticorrosion properties, cosmetic properties, and weather resistance. Since aluminum wheels are required to have a high level of cosmetics and anticorrosion properties under harsh conditions, such coatings have been studied to obtain excellent appearance and high anticorrosion performance. I came.
- the chromate treatment conventionally used in the chemical conversion treatment is not performed, and a chemical conversion treatment with a zirconium-based compound is performed as a non-chromate treatment.
- the non-chromate chemical conversion treatment with a zirconium-based compound may not be as effective as the chromate treatment in terms of anti-corrosion properties, and it is a multi-layer coating including non-chromate chemical conversion treatment coating, anti-corrosion coating, and clear coating. Is secured.
- Patent Document 1 describes an anticorrosive coating composition containing an acrylic resin, an epoxy resin, powdered silica, and crosslinkable polymer particles having specific physical properties. Furthermore, a thick film coating composition containing an acrylic resin, a blocked isocyanate compound, powdered silica and crosslinkable polymer particles is also described. Furthermore, a method for forming a coating film using these anticorrosive coating composition and thick film coating composition is also described.
- Patent Document 2 describes an antirust primer coating composition containing an acrylic resin, an epoxy resin, a block polyisocyanate compound, an organic bentonite, and an amide-based wetting and dispersing agent.
- Patent Document 3 describes a coating film forming method using a rust-preventing primer coating composition containing an acrylic resin, an epoxy resin, a block polyisocyanate compound, an organic bentonite, and an amide-based wetting and dispersing agent.
- a rust-preventing primer coating composition containing an acrylic resin, an epoxy resin, a block polyisocyanate compound, an organic bentonite, and an amide-based wetting and dispersing agent.
- the coating film formation method using any of the coating compositions described in any patent document cannot completely suppress the deterioration of the coating film due to salt damage, and the multilayer in the case of non-chromate chemical conversion treatment. None of the coatings satisfied the anticorrosion properties under severe use conditions.
- the present invention forms a coating film having corrosion resistance and adhesion that can prevent corrosion even in use in an area that is susceptible to salt damage, and having excellent cosmetic properties.
- Another object of the present invention is to provide an aluminum wheel coating method using such a paint composition and an aluminum wheel obtained thereby.
- the present invention provides an aluminum wheel coating method in which a clear multilayer coating film is formed by applying a clear coating composition after an anticorrosion coating composition is applied on an aluminum wheel.
- the anticorrosion coating composition has a mass average molecular weight.
- Acrylic resin (1) having a glass transition temperature of 50,000 to 140,000, a glass transition point of 20 to 50 ° C., a hydroxyl value of 10 to 50 mgKOH / g, an acid value of 10 to 40 mgKOH / g, and an epoxy equivalent of 210 to 1,000 g / eq It is an anticorrosive coating composition containing an epoxy resin (2) and containing 5 to 20 parts by mass of the epoxy resin (2) in terms of solid content with respect to 100 parts by mass of the acrylic resin (1). This is a method for painting aluminum wheels.
- the number average diameter of primary particles is 7 to 9 nm and the specific surface area (BET method) is 200 to 380 m 2 with respect to 100 parts by mass of the total solid content of the components (1) and (2).
- the clear coating composition comprises an acrylic resin (5) and a melamine resin (6), and further, an ultraviolet absorber (100 parts by mass for the total solids of the components (5) and (6)). 7) and 1 to 5 parts by mass of the light stabilizer (8) may be blended.
- the present invention is also an aluminum wheel characterized by being painted by any of the methods described above.
- the coating method of the present invention it is possible to produce an aluminum wheel having anticorrosion properties and excellent cosmetic properties that hardly cause deterioration even against salt damage.
- the present invention is a coating method for an aluminum wheel in which after applying an anticorrosive coating composition, a clear coating composition is applied to form a transparent multilayer coating film.
- the present invention by using a paint containing an epoxy resin as the anticorrosive paint composition, a paint film having good adhesion to the substrate and the clear paint film layer is formed.
- a paint containing an epoxy resin as the anticorrosive paint composition
- the coating film is soft, so that the swelling of the coating film increases and the corrosion resistance is poor. Therefore, in the present invention, an acrylic resin having a high glass transition point is used as the anticorrosive coating composition, and the anticorrosion factor is improved by improving the crosslink density of the coating film, thereby reducing the swelling of the paint and improving the corrosion resistance. I let you. Furthermore, adhesion with the base material was enhanced by adding an epoxy resin.
- the paint viscosity is increased to ensure edge cover properties, and by combining these, excellent anticorrosion performance is obtained. Furthermore, the present invention has excellent performance even in a paint for a wheel that requires appearance (smoothness), chipping resistance, and weather resistance.
- the aluminum wheel that is the object to be coated of the present invention mainly uses, for example, an aluminum alloy base material such as an AC4C alloy or an AC4CH alloy classified as an Al—Si—Mg alloy.
- an aluminum wheel is formed into a wheel shape by means of casting, forging or the like of an aluminum-based alloy. After that, for the purpose of removing the release agent and oxide film remaining on the surface and making the surface roughness uniform, it is struck against a molded aluminum alloy such as a stainless steel alloy piece. After that, necessary parts are cut for the purpose of mounting on the axle, mounting of the tire and design.
- zirconium-based chemical conversion treatment In painting an aluminum wheel that has undergone a cutting process, it is preferable to perform a zirconium-based chemical conversion treatment in order to improve the adhesion of the paint and enhance the corrosion resistance of the painted surface.
- the method for the chemical conversion treatment based on zirconium is not particularly limited, and a known method can be applied. More specifically, for example, the method described in JP-A-2008-80286 can be exemplified.
- the aluminum wheel coating method of the present invention is a coating method of an aluminum wheel in which a clear multilayer coating film is formed by applying a clear coating composition after applying an anticorrosion coating composition on the aluminum wheel that has been molded as described above. It is.
- the said anticorrosion coating composition contains an acrylic resin (1) and an epoxy resin (2). These acrylic resins (1) and epoxy resins (2) are as described in detail below.
- the acrylic resin (1) has a mass average molecular weight (hereinafter abbreviated as Mw) of 50,000 to 140,000, a glass transition point (hereinafter abbreviated as Tg) at 20 to 50 ° C., a hydroxyl value of 10 to 50 mgKOH / g and an acid. It is an acrylic resin having a value of 10 to 40 mg KOH / g.
- Mw is 50,000 to 140,000, preferably 50,000 to 100,000. When Mw is in the range of 50,000 to 140,000, good adhesion and corrosion resistance can be obtained. Mw is a value obtained by conversion using a polystyrene standard using GPC (gel permeation chromatography). In this specification, Mw is more specifically determined by using a GPC column (TSKgelsuperHZM-M, 4.6 mm ID ⁇ 15 cm, column temperature 40 ° C.) with THF (tetrahydrofuran) as an eluent and a flow rate of 0.35 ml / min. It is a value measured by.
- GPC gel permeation chromatography
- the acrylic resin (1) has a Tg of 20 to 50 ° C. If it is less than 20 ° C., the corrosion resistance is lowered, and if it exceeds 50 ° C., the chipping resistance is lowered. Tg is preferably 25 to 35 ° C. In addition, Tg in this specification is a glass transition temperature theoretically calculated from the weighted average of each monomer from the glass transition temperature of the homopolymer of each monomer.
- the acrylic resin (1) has a hydroxyl value of 10 to 50 mgKOH / g.
- the hydroxyl value is less than 10 mgKOH / g, the adhesion with the coating film formed by the clear coating composition becomes insufficient, and a desired effect cannot be obtained.
- the hydroxyl value exceeds 50 mgKOH / g, the anticorrosive effect is lowered, so that sufficient corrosion resistance cannot be obtained.
- the hydroxyl value is more preferably 10 to 30 mg KOH / g.
- the hydroxyl value can be determined by a method based on JIS K1557-1.
- the acrylic resin (1) has an acid value of 10 to 40 mgKOH / g.
- the acid value is less than 10 mgKOH / g, it is not preferable in that the adhesion is deteriorated or the corrosion resistance is deteriorated due to insufficient coating cross-linking density.
- the acid value exceeds 40 mgKOH / g, it is not preferable in that a problem that chipping property at a low temperature is lowered is caused.
- the acid value is more preferably 15 to 30 mg KOH / g.
- the acid value can be determined by a method based on JIS K1557-5.
- the acrylic resin (1) is not particularly limited in its chemical structure as long as it satisfies the physical properties described above, and is a composition comprising a monomer having an ethylenically unsaturated group capable of radical polymerization in the molecule. And the like obtained by polymerization.
- Examples of the compound having an ethylenically unsaturated group capable of radical polymerization in the molecule include hydroxylmethyl (meth) acrylate, hydroxylethyl (meth) acrylate, hydroxylpropyl (meth) acrylate, and hydroxylbutyl (meth) acrylate.
- Ethylenic monomer having a hydroxyl group such as N-methylolacrylamine
- ethylenic monomer having a carboxyl group such as (meth) acrylic acid, crotonic acid, itaconic acid, fumaric acid, maleic acid
- dodecyl Monomers such as alkyl esters of crylic acid
- monomers that can be polymerized by a usual method using a monomer composition comprising an ethylenic monomer copolymerizable with the above-mentioned monomers such as (meth) acrylonitrile and
- the acrylic resin (1) can be obtained by a known polymerization method such as emulsion polymerization, solution polymerization, suspension polymerization, etc., using the compound having an ethylenically unsaturated group as a raw material.
- the acrylic resin can adjust the molecular weight, acid value, and hydroxyl value by adjusting the amount of components used and the synthesis conditions during synthesis. Synthetic methods for acrylic resins and specific methods for adjusting the molecular weight, acid value, and hydroxyl value of acrylic resins are well known.
- acrylic resin (1) A commercially available thing can also be used as acrylic resin (1) in this invention.
- examples of commercially available acrylic resins that can be used as the acrylic resin (1) include Dianal HR-2079 and Dianal AS-1545 (manufactured by Mitsubishi Rayon Co., Ltd.).
- the epoxy resin (2) is an epoxy resin having an epoxy equivalent of 210 to 1,000 g / eq.
- the epoxy resin (2) is a general-purpose epoxy resin composed of a compound containing two or more epoxy groups in one molecule. By mix
- the epoxy equivalent is less than 210 g / eq, the chipping resistance at low temperature is lowered or the cross-linking density of the coating film is insufficient and the corrosion resistance is lowered, and when it exceeds 1,000 g / eq, the water resistance is lowered.
- the epoxy equivalent is preferably 270 to 1,000 g / eq.
- the epoxy resin (2) include glycidyl ether epoxy resins of polyphenol compounds such as bisphenol A, bisphenol F, 1,1,2,2-tetrakis (4′-hydroxyphenyl) ethane; Glycidyl ether epoxy resin of polyhydric phenols such as catechol, resorcin, hydroquinone, phloroglucin; Glycidyl ether epoxy resin of polyhydric alcohols such as ethylene glycol, butanediol, glycerol, erythritol, polyoxyalkylene glycol; Novolac type epoxy Resin; Cycloaliphatic epoxy resin such as vinylcyclohexene dioxide, limonene dioxide, dicyclopentadiene dioxide; Polycarbohydrate such as phthalic acid, cyclohexane-1,2-dicarboxylic acid Polyglycidyl ester epoxy resin ester condensate of acid; polyglycidyl amine epoxy resins. Of these, a
- epoxy resin (2) in this invention a commercially available thing can also be used.
- examples of commercially available epoxy resins that can be used as the epoxy resin (2) include EP-0150 (manufactured by Nippon Kayaku Epoxy Manufacturing Co., Ltd.).
- the blending ratio (parts by mass) of the solid content of the acrylic resin (1) and the epoxy resin (2) is 100/5 to 100/20 as (1) / (2), preferably 100/5 to 100 / 15.
- the blending ratio of the component (1) is lower than 100/5, the water-resistant adhesion is lowered, and when it exceeds 100/20, the chipping resistance at a low temperature is lowered.
- the anticorrosion coating composition used in the present invention is a powder in which the acrylic resin (1) and the epoxy resin (2) have a number average primary particle size of 7 to 9 nm and a specific surface area (BET method) of 200 to 380 m 2 / g. Silica (3) and crosslinkable polymer particles (4) having a primary particle number average diameter of 50 to 80 nm may be contained. By containing these components, the fluidity of the resin at the time of thermosetting is controlled after coating, and good edge cover properties are obtained, which is preferable in terms of obtaining excellent anticorrosion properties.
- the powder silica (3) used in the present invention is a powder silica having a primary particle number average diameter of 7 to 9 nm and a specific surface area of 200 to 380 m 2 / g by BET method (constant pressure / volume method with nitrogen gas using gas adsorption). It is preferable that The number average diameter of primary particles is an average value of the diameters of 3000 to 5000 particles obtained by observation with an electron microscope. By setting the number average diameter of the primary particles within the above range, it is preferable in that an effect of obtaining a good appearance (skin feeling) can be obtained.
- the specific surface area is a value obtained by a measurement method called BET method (constant pressure by nitrogen gas using gas adsorption, quantitative method). By setting the specific surface area within the above range, the fluidity of the resin at the time of thermosetting is controlled after coating, and a good edge cover property is obtained.
- silica that satisfies the above numerical range
- commercially available silica examples thereof include Aerosil 300 (manufactured by Nippon Aerosil Co., Ltd.), KONASIL K-300 (manufactured by OCI Company Ltd.), and the like.
- the blending amount (parts by mass) of the powdered silica (3) is preferably 5 to 20 when the total solid mass of the acrylic resin (1) and the epoxy resin (2) is 100. It is more preferable. By setting it within the above-mentioned range, it is preferable in that an effect that it is possible to achieve both good appearance and imparting edge cover properties can be obtained.
- the crosslinkable polymer particles (4) having a primary particle number average diameter of 50 to 80 nm used in the present invention are any resin particles used in the coating material as long as they satisfy the above particle diameter. Can be used.
- the number average diameter is a value measured by a particle diameter and particle size distribution measuring method (ELS-800, manufactured by Otsuka Electronics Co., Ltd.) using a dynamic light scattering method.
- crosslinkable polymer particles (4) that can be used include, for example, 0.1% by mass or more of a monomer having two or more radically polymerizable ethylenically unsaturated groups in the molecule.
- examples thereof include acrylic resin particles obtained by further using emulsion polymerization or solution polymerization.
- Specific examples include crosslinkable polymer particles obtained by the method for producing crosslinkable polymer fine particles (microgel) described in JP-A-62-79873.
- the blending amount (parts by mass) of the crosslinkable polymer particles (4) when the total solid content of the acrylic resin (1) and the epoxy resin (2) is 100 is preferably 1-10. 5 is more preferable. By setting it within the above-mentioned range, it is preferable in terms of obtaining the effect that the fluidity of the resin at the time of thermosetting becomes appropriate after coating and the edge cover property is excellent.
- the anticorrosive coating composition may contain components other than the components (1) to (4) as long as the performance as a coating composition is not affected.
- components that can be blended include waxes such as silane coupling agents and polyethylene waxes, plasticizers, leveling agents, dispersants, thickeners, surface conditioners, and the like.
- blend a silane coupling agent By blending a silane coupling agent, the adhesion between the anticorrosive coating composition and the substrate is improved, and this is preferable in terms of improving the anticorrosion performance.
- the silane coupling agent reacts with an organic functional group having reactivity and / or affinity for an organic polymer (such as a cured resin) and an inorganic material (such as a pigment contained in an anticorrosive coating composition). And / or an inorganic functional group exhibiting affinity.
- an organic functional group having reactivity and / or affinity for an organic polymer such as a cured resin
- an inorganic material such as a pigment contained in an anticorrosive coating composition
- an inorganic functional group exhibiting affinity By using such a silane coupling agent, it becomes possible to improve the adhesion of the interface where the organic polymer and the inorganic material are in contact, and the anticorrosion and anticorrosion resistance of the coating film can be improved.
- the organic functional group showing reactivity and / or affinity for the organic polymer include a vinyl group, an epoxy group, a methacryl group, an amino group, and a mercapto group.
- silane coupling agent examples include ⁇ -glycidoxyalkyl such as ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxytriethoxysilane, and ⁇ -glycidoxypropoxytrimethoxysilane.
- ⁇ -glycidoxypropyltrimethoxysilane is particularly preferable from the viewpoint of excellent reactivity with organic polymers.
- the silane coupling agent is preferably used in a proportion of 0.5 to 10 parts by mass, more preferably 1 to 5 parts by mass, with respect to 100 parts by mass of the resin solid content in the coating composition.
- the anticorrosion coating composition can be a coating composition of any form such as water-based or solvent-based, but is preferably a solvent-based coating.
- the anticorrosive coating composition can be applied by a usual method. In the method for coating an aluminum wheel of the present invention, it is preferable to perform baking after coating the anticorrosive coating composition. Baking is preferably performed under conditions where the baking temperature is room temperature to 160 ° C. and the baking time is 1 to 30 minutes. The film thickness on the cut surface after baking of the anticorrosion coating composition is preferably 10 to 30 ⁇ m.
- the anticorrosion paint composition is preferably a clear paint having transparency.
- the aluminum wheel coating method of the present invention includes a step of coating the clear coating composition after coating the anticorrosion coating composition.
- the clear coating composition it is preferable to use a coating composition containing a predetermined amount of acrylic resin (5), melamine resin (6), ultraviolet absorber (7) and light stabilizer (8).
- acrylic resin (5), melamine resin (6), ultraviolet absorber (7) and light stabilizer (8) By using such a clear coating composition, the adhesion with the anticorrosion coating is improved, and as a multilayer coating consisting of a chemical conversion coating, an anticorrosion coating, and a clear coating, Even in use, a favorable effect can be obtained in that corrosion resistance and adhesion that can prevent corrosion can be realized.
- the acrylic resin (5) is preferably an acrylic resin having a Mw of 7,000 to 20,000, a Tg of 0 to 40 ° C., and a hydroxyl value of 50 to 100 mgKOH / g.
- the acrylic resin (5) has a mass average molecular weight of 7,000 to 20,000, a favorable effect can be obtained in terms of smoothness of the resulting coating film surface and adhesion to the anticorrosion coating film.
- the acrylic resin (5) has a preferable effect in terms of chipping resistance by setting the Tg to 0 to 40 ° C.
- the acrylic resin (5) has a hydroxyl value of 50 to 100 mgKOH / g, a favorable effect can be obtained in terms of adhesion to the anticorrosive coating film.
- Such an acrylic resin (5) can be obtained by the same polymerization method using the same raw material as the acrylic resin (1) described above.
- the acrylic resin (5) is preferably contained in an amount of 60 to 80% by mass with respect to the total mass of the coating resin solid content. If the content is below the lower limit, the chipping property may be insufficient, and if it exceeds the upper limit, the weather resistance may be insufficient.
- the melamine resin (6) is not particularly limited, and a methylated melamine resin, a butylated melamine resin, a methyl / butyl mixed melamine resin, or the like can be used.
- Examples of commercially available products include “Cymel 303” and “Cymel 254” commercially available from Nippon Cytec Co., Ltd., “Uban 128” and “Uban 20N60” commercially available from Mitsui Chemicals, Sumitomo Chemical Co., Ltd.
- the “Sumimar series” commercially available from
- the melamine resin (6) is preferably contained in an amount of 10 to 30% by mass relative to the total mass of the coating resin solid content. If the content is lower than the lower limit, the curability may be insufficient, and if the content exceeds the upper limit, the cured coating film may be too hard and brittle.
- the content of the melamine resin (6) is more preferably 15 to 25% by mass.
- Salicylates such as phenyl salicylate, 4-t-butylphenyl salicylate, 2,4-di-t-butylphenyl-3,5'-di-t-butyl-4'-hydroxylbenzoate, 4-t-octylphenyl salicylate UV absorber; 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-methoxybenzophenone-5-sulfonic acid, 2-hydroxy-4-n-octoxybenzophenone, 2-hydroxy- 4-n-dodecyloxybenzophenone, 2-hydroxy-4-benzyloxybenzophenone, bis (5-benzoyl-4-hydroxy-2-methoxyphenyl) methane, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2 '-Dihydroxy-4,4'-dimeth Xylbenzophenone
- the content of the ultraviolet absorber is preferably 1 to 5 parts by mass as a solid content with respect to 100 parts by mass as a total of (6) solid contents of the acrylic resin (5) and the melamine resin. If it is less than 1 part by mass, cracks may occur during the weather resistance test, and if it exceeds 5 parts by mass, curability may be reduced.
- the light stabilizer (8) is not particularly limited, and examples thereof include phenyl-4-piperidinyl carbonate, bis- (2,2,6,6-tetramethyl-4-piperidinyl) sebacate, bis- (N -Methyl-2,2,6,6-tetramethyl-4-piperidinyl) sebacate, bis- (1,2,2,6,6-pentamethyl-4-piperidyl) -2- (3,5-di-t -Butyl-4-hydroxybenzyl) -2-n-butylmalonate, bis- (1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, 1,2,2,6,6-pentamethyl- Hindered amine light stabilizers such as 4-piperidyl methacrylate and 2,2,6,6-tetramethyl-4-piperidyl methacrylate; ethyl-2-cyano-3,3-diphenyl acrylate; Hexyl-2-cyano-3,3'-diphenyl
- the content of the light stabilizer is preferably 1 to 5 parts by mass as a solid content with respect to 100 parts by mass as a total of the solid contents of the acrylic resin (5) and the melamine resin (6). If it is less than 1 part by mass, cracks may occur during the weather resistance test, and if it exceeds 5 parts by mass, curability may be reduced.
- the coating composition containing the acrylic resin (5), the melamine resin (6), the ultraviolet absorber (7) and the light stabilizer (8) described above in a predetermined amount can be produced by a known method. Or a solvent-based paint.
- the clear coating composition may contain components other than the components (5) to (8) as long as the performance as a coating composition is not affected.
- components that can be blended include waxes such as silane coupling agents and polyethylene waxes, plasticizers, leveling agents, dispersants, thickeners, and the like.
- the clear coating composition can be a coating composition of any form such as water-based or solvent-based, but is preferably a solvent-based coating.
- the clear coating composition can be applied by an ordinary method. In the method for coating an aluminum wheel of the present invention, the above-described anticorrosion coating composition is baked after coating, and the clear coating composition is applied, and the clear coating composition is applied without baking after coating the anticorrosion coating composition. There is a case, either. Further, the clear coating composition may be applied after repeatedly applying the anticorrosion coating composition several times. Baking is preferably performed under the conditions of a baking temperature of 80 to 160 ° C. and a baking time of 5 to 30 minutes. The film thickness on the cut surface after baking of the clear coating composition is preferably 25 to 60 ⁇ m.
- the aluminum wheel painted by the above-described aluminum wheel coating method has excellent corrosion resistance, sufficient corrosion resistance can be obtained even when used in areas where problems due to salt damage are likely to occur. Is.
- a solvent hereinafter abbreviated as a mixed solvent
- a hydrocarbon solvent / alcohol solvent / ester solvent is mixed at a blending ratio (parts by mass) shown in Table 1, and acrylic resin, powdered silica, and mixed solvent are prepared.
- the powdered silica was dispersed at a ratio shown in Table 1 with a batch type disperser using glass beads until the tube gauge became 5 ⁇ m or less (JIS K-5600-2-5). The dispersion was taken out into a separate container, and the epoxy resin varnish based on Table 1 was added while stirring, and then the crosslinkable polymer particle solution and the additive were added in the same manner to produce each anticorrosive coating composition.
- epoxy resin EXS-1003 (manufactured by Nippon Paint) Epoxy equivalent 480 g / eq Powdered silica; Aerosil 300 (manufactured by Nippon Aerosil Co., Ltd.) Number average particle diameter 7 nm, specific surface area 300 m 2 / g Crosslinkable polymer particles; AZS-1230 (manufactured by Nippon Paint) primary particle number average diameter 69 nm Adhesion imparting agent; silane coupling agent KBM-403 (3-glycidoxypropyltrimethoxysilane; manufactured by Shin-Etsu Chemical Co., Ltd.) Surface conditioner; Regix (Mitsui Chemicals)
- Acrylic resin M and acrylic resin N are mixed so that the solid content mass ratio is 1: 2, and the total mass of acrylic resin M and acrylic resin N and the solid content mass ratio of melamine resin are 70:30.
- Melamine resin was mixed so that Furthermore, with respect to 100 parts of the total solid mass of acrylic resin M, acrylic resin N and melamine resin, 2 parts of crosslinkable polymer particles, 4 parts of ultraviolet absorber, and 2 parts of light stabilizer are added uniformly. The resulting mixture was mixed to prepare a clear paint.
- each raw material used is as follows.
- Acrylic resin M Dianar HR554 (manufactured by Mitsubishi Rayon Co., Ltd.) Mw 4000, Tg 10 ° C., hydroxyl value 95 mgKOH / g, acid value 22 mgKOH / g Acrylic resin N; ACR-461 (manufactured by Nippon Paint Co., Ltd.) Mw8300, Tg 25 ° C., hydroxyl value 70 mgKOH / g, acid value 20 mgKOH / g Melamine resin; MFS1000 (manufactured by Nippon Paint) Mw1500 Crosslinkable polymer particles; AZS-797 (manufactured by Nippon Paint Co., Ltd.) Number average diameter of primary particles 94 nm UV absorber; CHISORB234 (manufactured by Double Bond Chemical) Light stabilizer; CISORB 292 (manufactured by Double Bond Chemical)
- Pretreatment method of specimen The aluminum wheel was degreased, rinsed, pickled, and rinsed, then subjected to chemical conversion treatment under the conditions shown below, washed with water, dried, and then coated with an anticorrosive coating composition. Each process was processed by a dip method, and drying was performed at 120 ° C. for 15 minutes with an electric dryer.
- the chemical conversion treatment liquid one having the following composition was used.
- Chemical conversion treatment solution zirconium ion 0.025 g / liter, phosphate ion 0.07 g / liter, aluminum ion 0.04 g / liter, total fluorine ion (F ⁇ ) 0.115 g / liter, free fluorine ion (F ⁇ ) 0
- Chemical conversion solution (pH 3.2) having a composition of 0.005 g / liter, treatment temperature: 40 ° C., immersion treatment time: 45 seconds.
- each anticorrosive coating composition was air-sprayed on the entire surface so as to have a film thickness of 20 ⁇ m on the cut surface after thermosetting.
- a clear paint is sprayed on the entire surface to a film thickness of 30 ⁇ m on the cutting surface and baked (the surface temperature of the aluminum wheel is raised to 140 ° C. and held for 20 minutes) for thermosetting. did.
- the coating method of the present invention is a coating method that imparts particularly excellent anticorrosion properties and cosmetics, and can be suitably used as a coating method for aluminum wheels.
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Abstract
Description
上記範囲内とすることで、良好な外観とエッジカバー性の付与を両立することができるという効果が得られる点で好ましい。
このようなクリヤー塗料組成物を使用することによって、防食塗膜との密着性が良好となり、化成処理皮膜、防食塗膜、クリヤー塗膜からなる複層塗膜として、塩害を受けやすい地域での使用においても、腐食を防ぐことができるような防食性、密着性を実現することができるという点で好ましい効果が得られる。
(1,1,3,3-テトラメチルブチル)-6-(2N-ベンゾトリアゾール-2-イル)フェノール]等のベンゾトリアゾール系紫外線吸収剤等を挙げることができる。これらは、単独で使用してもよく、2種以上を併用してもよい。上記紫外線吸収剤の含有量は、上記アクリル樹脂(5)と上記メラミン樹脂の(6)固形分合計100質量部に対して、固形分として1~5質量部であることが好ましい。1質量部未満であると、耐候性試験時にクラックが発生するおそれがあり、5質量部を超えると、硬化性が低下するおそれがある。
炭化水素系溶剤/アルコール系溶剤/エステル系溶剤を表1に記載の配合比率(質量部)で混合した溶剤(以下、混合溶剤と略す)を用意し、アクリル樹脂、粉末シリカ、混合溶剤を、表1に記載した比率で、ガラスビーズを用いたバッチ式分散機でツブゲージ5μm以下(JIS K-5600-2-5)になるまで粉末シリカを分散した。分散物を別容器に取り出し攪拌しながら表1に基づくエポキシ樹脂ワニスを加え、次いで同様に架橋性重合体粒子溶液および添加剤を加えて各防食塗料組成物を製造した。
なお、表中のアクリル樹脂以外の各成分は、以下のものである。
エポキシ樹脂;EXS-1003(日本ペイント社製) エポキシ当量480g/eq
粉末シリカ;アエロジル300(日本アエロジル社製)個数平均粒子径7nm、比表面積300m2/g
架橋性重合体粒子;AZS-1230(日本ペイント社製)一次粒子の個数平均径69nm
密着性付与剤;シランカップリング剤KBM-403(3-グリシドキシプロピルトリメトキシシラン;信越化学工業社製)
表面調整剤;レジミックス(三井化学社製)
アクリル樹脂Mとアクリル樹脂Nとを固形分質量比が1:2になるように混合し、更にアアクリル樹脂Mとアクリル樹脂Nとの合計量とメラミン樹脂との固形分質量比が70:30になるようにメラミン樹脂を混合した。さらに、アクリル樹脂Mとアクリル樹脂Nとメラミン樹脂の合計固形分質量100部に対し、架橋性重合体粒子を2部、紫外線吸収剤を4部、光安定剤を2部添加して、均一になるように混合し、クリヤー塗料を製造した。
アクリル樹脂M;ダイヤナールHR554(三菱レイヨン社製) Mw4000、Tg10℃、水酸基価 95mgKOH/g、酸価 22mgKOH/g
アクリル樹脂N;ACR-461(日本ペイント社製) Mw8300、Tg 25℃、水酸基価 70mgKOH/g、酸価 20mgKOH/g
メラミン樹脂;MFS1000(日本ペイント社製)Mw1500
架橋性重合体粒子;AZS-797(日本ペイント社製)一次粒子の個数平均径94nm
紫外線吸収剤;CHISORB234(Double Bond Chemical社製)
光安定剤;CHISORB292(Double Bond Chemical社製)
アルミホイールに対して脱脂、水洗、酸洗処理、水洗を行った後、以下に示した条件で化成処理を行い、水洗、乾燥後、防食塗料組成物による塗装を行った。各工程は、全てディップ方式で処理を行い、乾燥は、電気乾燥機で120℃、15分間行った。化成処理液は、以下の組成を有するものを使用した。
化成処理液:ジルコニウムイオン0.025g/リットル、リン酸イオン0.07g/リットル、アルミニウムイオン0.04g/リットル、全フッ素イオン(F-)0.115g/リットル、遊離フッ素イオン(F-)0.005g/リットルの組成を有する化成処理液(pH3.2)、処理温度:40℃、浸漬処理時間:45秒。
切削加工されたアルミホイールに上記前処理を行った後に、各防食塗料組成物を、熱硬化後に切削面上で20μmの膜厚になるように、全面にエアースプレーした。その上にクリヤー塗料を、切削面上で、30μmの膜厚になるように全面にエアースプレーし、焼付(アルミホイールの表面温度を140℃まで上昇させ、20分間保持すること)して熱硬化した。
CASS試験用各試験片の表面をカッターナイフにより10cm長さでカットし、JISZ2371-2000で調整されたCASS試験液を50±2℃で240時間噴霧を行い、カット部の周辺3mm以内における腐食の度合いを評価した。その結果において、塗膜の片側最大錆幅が3mm以下を良好とした。得られた結果を表2に示す。
CASS試験において、切削エッジ部の腐食の度合いを評価した。錆が全くないものをA錆が1~3点発生しているものをB、錆が4点以上発生しているものをCとした。
塗膜にカットを入れ、「塩水噴霧を24時間行い、その後、120時間、湿潤(湿度85%、40℃)させ、続いて、24時間、室温で自然乾燥させる」とのサイクルを8サイクル行い、カット部の片側の錆幅を測定した。その結果において、塗膜の錆幅が2mm以下を良好とした。得られた結果を表2に示す。
上述したCASS試験の方法による試験を行った後に、上述した耐糸錆性試験による塩水噴霧を行って、その後のカット部片側の錆幅を測定した。その結果において、片側最大錆幅10mm以下を良好とした。得られた結果を表2に示す。
塩水噴霧試験用に適当な大きさに切断した各試験片の表面を、カッターナイフによりクロスカットした後、5質量%のNaCl水溶液を用いて、35℃で1200時間塩水噴霧を行った。塩水噴霧終了後、24時間放置後のクロスカット部片側の錆幅を測定した。その結果において、片側最大錆幅2mm以下を良好とした。得られた結果を表2に示す。
グラベロ試験機(スガ試験機製、JA-400LA)にて、飛び石試験機と試験片の距離が350mmとなるようにセットし、玄武岩6号砕石(日本舗道製)を篩にかけ、4.8~8.0mmの大きさに調節した新品の飛び石100gを、射出圧力0.4MPaで試験片に射出した。評価は各試験片において傷の大きなものから10点を選択し、10点の長径の平均値が2.81mm未満をA、2.81mm以上をCとした。
Claims (4)
- アルミホイール上に防食塗料組成物を塗布した後、クリヤー塗料組成物を塗布して透明複層塗膜を形成させるアルミホイールの塗装方法において、
前記防食塗料組成物は、質量平均分子量50,000~140,000、ガラス転移点20~50℃、水酸基価10~50mgKOH/g、酸価10~40mgKOH/gのアクリル樹脂(1)、及び、エポキシ当量210~1,000g/eqのエポキシ樹脂(2)を含有し、
アクリル樹脂(1)固形分100質量部に対してエポキシ樹脂(2)を固形分換算で5~20質量部含有する防食塗料組成物であることを特徴とするアルミホイールの塗装方法。 - 前記防食塗料組成物が、更に、上記成分(1)及び(2)の合計固形分100質量部に対して、一次粒子の個数平均径が7~9nm、比表面積(BET法)200~380m2/gの粉末シリカ(3)5~20質量部、及び、一次粒子の個数平均径が50~80nmの架橋性重合体粒子(4)1~10質量部を配合した防食塗料組成物である請求項1に記載のアルミホイールの塗装方法。
- 前記クリヤー塗料組成物は、アクリル樹脂(5)と、メラミン樹脂(6)とを配合し、更に、上記成分(5)と(6)との固形分の合計100質量部に対して、紫外線吸収剤(7)、及び、光安定剤(8)をそれぞれ1~5質量部を含有することを特徴とする請求項1又は2に記載のアルミホイールの塗装方法。
- 請求項1~3のいずれか1項に記載の方法により塗装されたことを特徴とするアルミホイール。
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CN109111817A (zh) * | 2018-07-18 | 2019-01-01 | 廊坊立邦涂料有限公司 | 一种具有高闪烁度效应的珠光清漆及其制备方法 |
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