JP2011089057A - Coating composition for aluminum alloy - Google Patents
Coating composition for aluminum alloy Download PDFInfo
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- JP2011089057A JP2011089057A JP2009244574A JP2009244574A JP2011089057A JP 2011089057 A JP2011089057 A JP 2011089057A JP 2009244574 A JP2009244574 A JP 2009244574A JP 2009244574 A JP2009244574 A JP 2009244574A JP 2011089057 A JP2011089057 A JP 2011089057A
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- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 36
- 239000008199 coating composition Substances 0.000 title claims abstract description 32
- 229920002125 Sokalan® Polymers 0.000 claims abstract description 51
- 239000004584 polyacrylic acid Substances 0.000 claims abstract description 51
- -1 polyethylene Polymers 0.000 claims abstract description 51
- 239000004698 Polyethylene Substances 0.000 claims abstract description 33
- 229920000573 polyethylene Polymers 0.000 claims abstract description 33
- 239000007787 solid Substances 0.000 claims abstract description 25
- 229920005749 polyurethane resin Polymers 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000000576 coating method Methods 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 239000010409 thin film Substances 0.000 abstract description 11
- 239000010408 film Substances 0.000 description 27
- 239000001993 wax Substances 0.000 description 27
- 238000012360 testing method Methods 0.000 description 18
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 17
- 239000000126 substance Substances 0.000 description 17
- 229920005989 resin Polymers 0.000 description 15
- 239000011347 resin Substances 0.000 description 15
- 239000000463 material Substances 0.000 description 13
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 11
- 239000007864 aqueous solution Substances 0.000 description 10
- 239000006185 dispersion Substances 0.000 description 10
- 239000000178 monomer Substances 0.000 description 10
- 239000002245 particle Substances 0.000 description 10
- 239000004925 Acrylic resin Substances 0.000 description 8
- 229920000178 Acrylic resin Polymers 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 229920001800 Shellac Polymers 0.000 description 7
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 229920001296 polysiloxane Polymers 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 7
- 229940113147 shellac Drugs 0.000 description 7
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920005862 polyol Polymers 0.000 description 4
- 150000003077 polyols Chemical class 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 239000004814 polyurethane Substances 0.000 description 4
- 239000012508 resin bead Substances 0.000 description 4
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
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- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 239000003995 emulsifying agent Substances 0.000 description 3
- 239000003822 epoxy resin Substances 0.000 description 3
- SHZIWNPUGXLXDT-UHFFFAOYSA-N ethyl hexanoate Chemical compound CCCCCC(=O)OCC SHZIWNPUGXLXDT-UHFFFAOYSA-N 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 229920000647 polyepoxide Polymers 0.000 description 3
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- 239000004645 polyester resin Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- FVQMJJQUGGVLEP-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy 2-ethylhexaneperoxoate Chemical compound CCCCC(CC)C(=O)OOOC(C)(C)C FVQMJJQUGGVLEP-UHFFFAOYSA-N 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N 1,4a-dimethyl-7-propan-2-yl-2,3,4,4b,5,6,10,10a-octahydrophenanthrene-1-carboxylic acid Chemical compound C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 2
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 230000003666 anti-fingerprint Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- WMYWOWFOOVUPFY-UHFFFAOYSA-L dihydroxy(dioxo)chromium;phosphoric acid Chemical compound OP(O)(O)=O.O[Cr](O)(=O)=O WMYWOWFOOVUPFY-UHFFFAOYSA-L 0.000 description 2
- 239000004205 dimethyl polysiloxane Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007720 emulsion polymerization reaction Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 2
- 239000003505 polymerization initiator Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- XHAFIUUYXQFJEW-UHFFFAOYSA-N 1-chloroethenylbenzene Chemical compound ClC(=C)C1=CC=CC=C1 XHAFIUUYXQFJEW-UHFFFAOYSA-N 0.000 description 1
- STMDPCBYJCIZOD-UHFFFAOYSA-N 2-(2,4-dinitroanilino)-4-methylpentanoic acid Chemical compound CC(C)CC(C(O)=O)NC1=CC=C([N+]([O-])=O)C=C1[N+]([O-])=O STMDPCBYJCIZOD-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- OBETXYAYXDNJHR-UHFFFAOYSA-N 2-Ethylhexanoic acid Chemical compound CCCCC(CC)C(O)=O OBETXYAYXDNJHR-UHFFFAOYSA-N 0.000 description 1
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
- QOXOZONBQWIKDA-UHFFFAOYSA-N 3-hydroxypropyl Chemical group [CH2]CCO QOXOZONBQWIKDA-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 229910018134 Al-Mg Inorganic materials 0.000 description 1
- 229910018467 Al—Mg Inorganic materials 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- 239000004970 Chain extender Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 239000004166 Lanolin Substances 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- ATMLPEJAVWINOF-UHFFFAOYSA-N acrylic acid acrylic acid Chemical compound OC(=O)C=C.OC(=O)C=C ATMLPEJAVWINOF-UHFFFAOYSA-N 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 125000005907 alkyl ester group Chemical group 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000004203 carnauba wax Substances 0.000 description 1
- 235000013869 carnauba wax Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000013527 degreasing agent Substances 0.000 description 1
- 238000005237 degreasing agent Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 238000005227 gel permeation chromatography Methods 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 125000003010 ionic group Chemical group 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 235000019388 lanolin Nutrition 0.000 description 1
- 229940039717 lanolin Drugs 0.000 description 1
- PBOSTUDLECTMNL-UHFFFAOYSA-N lauryl acrylate Chemical compound CCCCCCCCCCCCOC(=O)C=C PBOSTUDLECTMNL-UHFFFAOYSA-N 0.000 description 1
- 239000000314 lubricant 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
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- FQPSGWSUVKBHSU-UHFFFAOYSA-N methacrylamide Chemical compound CC(=C)C(N)=O FQPSGWSUVKBHSU-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 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
- 239000003607 modifier Substances 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 150000002923 oximes Chemical class 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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Images
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- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
本発明は、薄膜で導電性を確保し、かつ薄膜でも耐疵付き性や耐指紋性に優れる塗膜を形成できるアルミニウム合金用の塗料組成物に関する。 The present invention relates to a coating composition for an aluminum alloy that can ensure conductivity with a thin film and can form a coating film that is excellent in scratch resistance and fingerprint resistance even with a thin film.
従来より、アルミニウム合金板の表面を塗料組成物にてコーティングしてなるプレコートアルミニウム合金板は、耐食性に優れ、軽量でかつ成形後に塗装を施す必要がないという特性を有している。その為、プレコートアルミニウム合金板は、耐疵付き性や耐指紋性が要求される家電製品や電気機器の筐体等の材料として広く用いられている。しかし用いられる塗料組成物による塗膜は、通常、電気的絶縁性を有していることから、帯電防止性能が不十分であるという難点を有している。これを解決する手段として、導電性物質を塗膜中に含有させた種々の金属塗装板が提案されている。 Conventionally, a pre-coated aluminum alloy plate obtained by coating the surface of an aluminum alloy plate with a coating composition has excellent properties such as corrosion resistance, light weight, and no need for coating after forming. For this reason, pre-coated aluminum alloy plates are widely used as materials for home appliances and electrical equipment casings that require scratch resistance and fingerprint resistance. However, since the coating film by the coating composition used usually has electrical insulation, it has a problem that its antistatic performance is insufficient. As means for solving this, various metal-coated plates in which a conductive substance is contained in a coating film have been proposed.
例えば、特許文献１には、アルミニウム材の少なくとも片面に、ポリエステル系樹脂、エポキシ系樹脂、ウレタン系樹脂の１種以上と潤滑粒子とを含有する樹脂被覆層が形成されている樹脂被覆アルミニウム材であって、アース端子などを設けなくても表面に単に金属片を接触させるだけで導電性を得ることができ、かつ耐疵つき性や耐指紋付着性が良好な樹脂被覆アルミニウム材（Ａｌ材）およびその成形品が開示されている。 For example, Patent Document 1 discloses a resin-coated aluminum material in which a resin coating layer containing at least one of a polyester resin, an epoxy resin, and a urethane resin and lubricating particles is formed on at least one surface of an aluminum material. Resin-coated aluminum material (Al material) that can be made conductive by simply bringing a metal piece into contact with the surface without providing a grounding terminal, etc., and also has good anti-sticking and anti-fingerprint properties And molded articles thereof.
一方、特許文献２には、アルミニウム合金板よりなる基板と、該基板の片面又は両面に形成した化成皮膜と、該化成皮膜上に形成したプレコート層とよりなり、該プレコート層は、ベース樹脂中に粒子状合成樹脂よりなる樹脂ビーズ及び導電性物質を分散させてなる上塗り層を有し、上記上塗り層は、さらにインナーワックスを含有していることを特徴とする、耐傷付き性や耐指紋付着性に優れたプレコートアルミニウム合金板が開示されている。 On the other hand, Patent Document 2 includes a substrate made of an aluminum alloy plate, a chemical conversion film formed on one or both surfaces of the substrate, and a precoat layer formed on the chemical conversion film. A resin bead made of particulate synthetic resin and a topcoat layer in which a conductive substance is dispersed, and the topcoat layer further contains an inner wax, and is resistant to scratches and fingerprints. A precoated aluminum alloy sheet having excellent properties is disclosed.
他に、特許文献３には、金属板の両面に形成した化成皮膜と、前記化成皮膜の一方の上に形成した塗膜であって、ポリエステル系樹脂、エポキシ系樹脂及びアクリル系樹脂から成る群から選択される少なくとも１種のベース樹脂と、樹脂ビーズと潤滑剤、さらには導電材を含有する塗膜を特徴とする耐傷付け性
プレコート金属板が開示されている。
In addition, Patent Document 3 discloses a chemical film formed on both surfaces of a metal plate and a film formed on one of the chemical films, the group consisting of a polyester resin, an epoxy resin, and an acrylic resin. There is disclosed a scratch-resistant precoated metal sheet characterized by a coating film containing at least one base resin selected from the group consisting of resin beads, a lubricant, and a conductive material.
特許文献１〜３には、潤滑粒子や樹脂ビースを配合し、耐疵つき性と耐指紋性に優れ、かつ導電性を有する樹脂被覆アルミニウム板について記載されている。しかし、潤滑粒子や樹脂ビースの配向によっては導電性に不具合が生じたり、膜厚を厚くしないと耐疵つき性を確保できない等の不具合がある。 Patent Documents 1 to 3 describe resin-coated aluminum plates that are blended with lubricating particles and resin beads, have excellent scratch resistance and fingerprint resistance, and have conductivity. However, depending on the orientation of the lubricating particles and the resin beads, there are problems such as a problem in electrical conductivity, and the fact that the scratch resistance cannot be secured unless the film thickness is increased.
これに対し、特許文献４には、該基板の片面又は両面に形成した化成皮膜と、該化成皮膜上に形成した導電層とよりなり、該導電層は、ウレタン樹脂、アイオノマー樹脂、ポリエチレン樹脂、エポキシ樹脂、フッ素樹脂、ポリエステル樹脂のうち１種又は２種以上からなる樹脂よりなり、０．０５〜１．０μｍの薄膜とすることにより、導電性物質を含まなくとも優れた導電性を有し、かつ耐指紋性に優れた導電性プレコートアルミニウム合金板が開示されている。 In contrast, Patent Document 4 includes a chemical conversion film formed on one or both surfaces of the substrate and a conductive layer formed on the chemical conversion film. The conductive layer includes a urethane resin, an ionomer resin, a polyethylene resin, It consists of a resin composed of one or more of epoxy resin, fluororesin, and polyester resin, and has excellent conductivity even if it does not contain a conductive substance by making it a thin film of 0.05 to 1.0 μm. In addition, a conductive precoated aluminum alloy plate excellent in fingerprint resistance is disclosed.
しかし、上記の特許文献４では、薄膜で導電性を付与することはできるものの、耐疵付き性や耐指紋性に対しては不十分であった。特にＣＤ−ＲＯＭドライブ用等の電子機器筐体は、何度もドライブを出し入れすることから負荷が大きく、このような用途においても十分に耐疵付き性や耐指紋性に優れる皮膜は得られなかった。 However, in the above-mentioned Patent Document 4, although it is possible to impart conductivity with a thin film, it is insufficient with respect to scratch resistance and fingerprint resistance. In particular, an electronic device casing for a CD-ROM drive or the like has a heavy load because the drive is inserted and removed many times, and even in such an application, a film excellent in scratch resistance and fingerprint resistance cannot be obtained. It was.
発明が解決しようとする課題は、薄膜（膜厚０．０５〜１．０μｍ）で導電性を確保し、かつ薄膜でも耐疵付き性や耐指紋性に優れた塗膜が形成できるアルミニウム合金用の塗料組成物を提供することである。 The problem to be solved by the invention is for an aluminum alloy that can secure a conductive property with a thin film (film thickness: 0.05 to 1.0 μm) and can form a coating film with excellent anti-sticking property and fingerprint resistance even with a thin film. It is providing the coating composition of this.
発明者等は鋭意検討した結果、重量平均分子量３，０００〜３００，０００のポリアクリル酸（Ａ）とポリエチレンワックス（Ｂ）とを、両者の固形分合計に基づいて、ポリアクリル酸（Ａ）を７〜６５質量％、ポリエチレンワックス（Ｂ）を３５〜９３質量％の割合で含有することを特徴とするアルミニウム合金用の塗料組成物（Ｉ）；または、重量平均分子量３，０００〜３００，０００のポリアクリル酸（Ａ）、ポリエチレンワックス（Ｂ）及び水分散性のポリウレタン樹脂（Ｃ）を、これらの固形分合計に基づいて、ポリアクリル酸（Ａ）を３〜４５質量％、ポリエチレンワックス（Ｂ）を２０〜６２質量％、及び水分散性のポリウレタン樹脂（Ｃ）を３５〜７７質量％の割合で含有することを特徴とするアルミニウム合金用の塗料組成物（ＩＩ）；によって、上記課題の解決が達成できることを見出し、本発明を完成するに至った。 As a result of intensive studies, the inventors have determined that polyacrylic acid (A) having a weight average molecular weight of 3,000 to 300,000 and polyethylene wax (B) are based on the total solid content of the polyacrylic acid (A). 7 to 65% by mass and polyethylene wax (B) in a proportion of 35 to 93% by mass; a coating composition (I) for an aluminum alloy, or a weight average molecular weight of 3,000 to 300, 000 polyacrylic acid (A), polyethylene wax (B) and water-dispersible polyurethane resin (C), based on the total solid content of these, 3 to 45% by weight of polyacrylic acid (A), polyethylene wax (B) 20-62 mass% and water-dispersible polyurethane resin (C) are contained in the ratio of 35-77 mass%, The coating material for aluminum alloys characterized by the above-mentioned Narubutsu (II); by, found that the resolution of the problems can be achieved, thereby completing the present invention.
即ち、本発明は、
１．重量平均分子量３，０００〜３００，０００のポリアクリル酸（Ａ）とポリエチレンワックス（Ｂ）とを、両者の固形分合計に基づいて、ポリアクリル酸（Ａ）を７〜６５質量％、ポリエチレンワックス（Ｂ）を３５〜９３質量％の割合で含有することを特徴とするアルミニウム合金用の塗料組成物、
２．重量平均分子量３，０００〜３００，０００のポリアクリル酸（Ａ）、ポリエチレンワックス（Ｂ）及び水分散性のポリウレタン樹脂（Ｃ）を、これらの固形分合計に基づいて、ポリアクリル酸（Ａ）を３〜４５質量％、ポリエチレンワックス（Ｂ）を２０〜６２質量％、及び水分散性のポリウレタン樹脂（Ｃ）を３５〜７７質量％の割合で含有することを特徴とするアルミニウム合金用の塗料組成物、
３．１項又は２項に記載の塗料組成物をアルミニウム合金板に塗装してなる皮膜形成方法、に関する。
That is, the present invention
1. Polyacrylic acid (A) having a weight average molecular weight of 3,000 to 300,000 and polyethylene wax (B), based on the total solid content of both, 7 to 65% by mass of polyacrylic acid (A), polyethylene wax A coating composition for an aluminum alloy, comprising (B) in a proportion of 35 to 93% by mass;
2. A polyacrylic acid (A) having a weight average molecular weight of 3,000 to 300,000, a polyethylene wax (B) and a water dispersible polyurethane resin (C) based on the total solid content thereof. 3 to 45 mass%, polyethylene wax (B) 20 to 62 mass%, and water-dispersible polyurethane resin (C) in a proportion of 35 to 77 mass%. Composition,
The present invention relates to a film forming method in which an aluminum alloy plate is coated with the coating composition according to 3.1 or 2.
本発明のアルミニウム合金用の塗料組成物は、薄膜（膜厚０．０５〜１．０μｍ）で導電性を確保し、かつ薄膜でも耐疵付き性や耐指紋性に優れる塗装物品を提供できる。特に、電子機器筐体用に有用である。 The coating composition for an aluminum alloy of the present invention can provide a coated article that ensures conductivity with a thin film (film thickness: 0.05 to 1.0 μm) and is excellent in scratch resistance and fingerprint resistance even with a thin film. In particular, it is useful for an electronic device casing.
本発明のアルミニウム合金用の塗料組成物は、重量平均分子量３，０００〜３００，０００のポリアクリル酸（Ａ）とポリエチレンワックス（Ｂ）とを、両者の固形分合計に基づいて、ポリアクリル酸（Ａ）を７〜６５質量％、ポリエチレンワックス（Ｂ）を３５〜９３質量％の割合で含有することを特徴とするアルミニウム合金用の塗料組成物（Ｉ）である。 The coating composition for an aluminum alloy of the present invention comprises a polyacrylic acid (A) having a weight average molecular weight of 3,000 to 300,000 and a polyethylene wax (B) based on the total solid content of both. It is a coating composition (I) for an aluminum alloy, containing (A) in a proportion of 7 to 65% by mass and polyethylene wax (B) in a proportion of 35 to 93% by mass.
または、重量平均分子量３，０００〜３００，０００のポリアクリル酸（Ａ）、ポリエチレンワックス（Ｂ）及び水分散性のポリウレタン樹脂（Ｃ）を、これらの固形分合計に基づいて、ポリアクリル酸（Ａ）を３〜４５質量％、ポリエチレンワックス（Ｂ）を２０〜６２質量％、及び水分散性のポリウレタン樹脂（Ｃ）を３５〜７７質量％の割合で含有することを特徴とするアルミニウム合金用の塗料組成物（ＩＩ）である。以下、詳細に述べる。 Alternatively, a polyacrylic acid (A) having a weight average molecular weight of 3,000 to 300,000, a polyethylene wax (B), and a water dispersible polyurethane resin (C) are converted into polyacrylic acid ( The aluminum alloy is characterized by containing A to 3 to 45% by mass, polyethylene wax (B) to 20 to 62% by mass, and water dispersible polyurethane resin (C) to 35 to 77% by mass. The coating composition (II). Details will be described below.
ポリアクリル酸（Ａ）：
本発明のアルミニウム合金用の塗料組成物は、ポリアクリル酸（Ａ）を含有する。また、ポリアクリル酸（Ａ）は、水酸化ナトリウム、水酸化カリウム等の水酸化金属塩、アンモニア等により部分中和して使用することもできる。ポリアクリル酸（Ａ）を中和したものを使用することによって、他の成分との相溶性が向上し、塗料安定性が向上する。
Polyacrylic acid (A):
The coating composition for an aluminum alloy of the present invention contains polyacrylic acid (A). The polyacrylic acid (A) can also be used after partially neutralized with a metal hydroxide salt such as sodium hydroxide or potassium hydroxide, ammonia or the like. By using a neutralized polyacrylic acid (A), the compatibility with other components is improved and the coating stability is improved.
このような、ポリアクリル酸（Ａ）の重量平均分子量は、３，０００〜３００，０００、特に４，０００〜３０，０００の範囲にある。重量平均分子量が、３，０００未満であると耐疵付き性が十分でなく、重量平均分子量が３００，０００を超えると導電性が劣るので好ましくない。 Such polyacrylic acid (A) has a weight average molecular weight in the range of 3,000 to 300,000, particularly 4,000 to 30,000. If the weight average molecular weight is less than 3,000, scratch resistance is not sufficient, and if the weight average molecular weight exceeds 300,000, the conductivity is inferior.
本明細書において重量平均分子量は、溶媒としてテトラヒドロフランを使用し、ゲルパーミュエーションクロマトグラフィにより測定した保持時間（保持容量）をポリスチレンの重量平均分子量を基準にして換算した値である。 In the present specification, the weight average molecular weight is a value obtained by converting the retention time (retention capacity) measured by gel permeation chromatography using tetrahydrofuran as a solvent, based on the weight average molecular weight of polystyrene.
ゲルパーミエーションクロマトグラフは、「ＨＬＣ８１２０ＧＰＣ」（東ソー社製）を使用した。カラムとしては、「ＴＳＫｇｅｌ Ｇ−４０００ＨＸＬ」、「ＴＳＫｇｅｌ Ｇ−３０００ＨＸＬ」、「ＴＳＫｇｅｌ Ｇ−２５００ＨＸＬ」、「ＴＳＫｇｅｌ Ｇ−２０００ＨＸＬ」（いずれも東ソー（株）社製、商品名）の４本を用い、移動相；テトラヒドロフラン、測定温度；４０℃、流速；１ｍｌ／分、検出器；ＲＩの条件で行ったものである。 As the gel permeation chromatograph, “HLC8120GPC” (manufactured by Tosoh Corporation) was used. As the column, four columns of “TSKgel G-4000HXL”, “TSKgel G-3000HXL”, “TSKgel G-2500HXL”, “TSKgel G-2000HXL” (both manufactured by Tosoh Corporation, trade name) were used, Mobile phase: Tetrahydrofuran, measurement temperature: 40 ° C., flow rate: 1 ml / min, detector: under the conditions of RI.
ポリアクリル酸（Ａ）の市販品としては、例えば、ジュリマーＡＣ−１０Ｌ、ジュリマーＡＣ−１０ＬＨＰ（以上、日本純薬（株）製）が挙げられる。 Examples of commercially available products of polyacrylic acid (A) include Jurimer AC-10L, Jurimer AC-10LHP (manufactured by Nippon Pure Chemical Co., Ltd.).
ポリエチレンワックス（Ｂ）：
本発明のアルミニウム合金用の塗料組成物は、ポリエチレンワックス（Ｂ）を含有する。ポリエチレンワックス（Ｂ）は、重量平均分子量が６００〜１２，０００、融点１０５〜１４０℃を有するものが好適に用いられる。
Polyethylene wax (B):
The coating composition for an aluminum alloy of the present invention contains polyethylene wax (B). As the polyethylene wax (B), those having a weight average molecular weight of 600 to 12,000 and a melting point of 105 to 140 ° C. are suitably used.
ポリエチレンワックス（Ｂ）は、通常、水分散体として用いられ、その水分散体の平均粒径は、０．０５μｍから７．５μｍを有するものが好適に用いられる。好ましい範囲は、１．０μｍから５．０μｍの範囲が、耐疵付き性向上のためによい。なお平均粒径は、ＬＡ−５００（堀場製作所社製、レーザー回折式粒度分布測定装置）を用いて測定した値である。 The polyethylene wax (B) is usually used as an aqueous dispersion, and an aqueous dispersion having an average particle size of 0.05 μm to 7.5 μm is preferably used. A preferable range is 1.0 μm to 5.0 μm for improving the scratch resistance. The average particle diameter is a value measured using LA-500 (manufactured by Horiba, Ltd., laser diffraction particle size distribution analyzer).
このようなポリエチレンワックス（Ｂ）の市販品としては、ＨＩ−ＤＩＳＰＥＲ Ａ−３７５、ＨＩ−ＤＩＳＰＥＲ ＡＢ−５０、ＨＩ−ＤＩＳＰＥＲ ＡＦ−４１、ＨＩ−ＤＩＳＰＥＲ ＡＧ−７３、ＨＩ−ＤＩＳＰＥＲ Ａ−５１２、ＨＩ−ＤＩＳＰＥＲ Ａ−３３２、ＨＩ−ＤＩＳＰＥＲ ＡＥ−０４、ＨＩ−ＤＩＳＰＥＲ Ａ−５１４（以上、岐阜セラック社製）、ケミパールＷ１００、ケミパールＷ３００、ケミパールＷ４０１、ケミパールＷ５００、ケミパールＷ７００、ケミパールＷ９００、（以上、三井化学社製）が挙げられる。 Examples of such commercially available polyethylene wax (B) include HI-DISPER A-375, HI-DISPER AB-50, HI-DISPER AF-41, HI-DISPER AG-73, HI-DISPER A-512, HI. -DISPER A-332, HI-DISPER AE-04, HI-DISPER A-514 (above, manufactured by Gifu Shellac Co., Ltd.), Chemipearl W100, Chemipearl W300, Chemipearl W401, Chemipearl W500, Chemipearl W700, Chemipearl W900, (above, Mitsui Chemical Co., Ltd.).
本発明では、塗料組成物（Ｉ）として、上記ポリアクリル酸（Ａ）とポリエチレンワックス（Ｂ）とを、両者の固形分合計に基づいて、ポリアクリル酸（Ａ）を７〜６５質量％、好ましくは４０〜６３質量％、ポリエチレンワックス（Ｂ）を３５〜９３質量％、好ましくは３７〜６０質量％の割合で含有することが、耐疵付き性や耐指紋性の向上の為に必須である。 In the present invention, as the coating composition (I), the polyacrylic acid (A) and the polyethylene wax (B), based on the total solid content of both, the polyacrylic acid (A) is 7 to 65% by mass, Preferably 40 to 63% by mass, polyethylene wax (B) is contained in a proportion of 35 to 93% by mass, preferably 37 to 60% by mass, in order to improve the anti-fouling property and fingerprint resistance. is there.
水分散性のウレタン樹脂（Ｃ）：
水分散性ポリウレタン樹脂は、ポリエステルポリオール、ポリエーテルポリオール等のポリオールとジイソシアネートからなるポリウレタンを必要に応じて、ジオール、ジアミン等のような２個以上の活性水素をもつ低分子量化合物である鎖伸長剤の存在下で鎖伸長し、水中に安定に分散もしくは溶解させたものであり、公知のものを広く使用することができる。
Water dispersible urethane resin (C):
Water dispersible polyurethane resin is a chain extender which is a low molecular weight compound having two or more active hydrogens such as diol, diamine, etc., if necessary, a polyurethane comprising a polyol and a diisocyanate such as polyester polyol and polyether polyol The chain is elongated in the presence of water and is stably dispersed or dissolved in water, and known materials can be widely used.
ポリウレタン樹脂を水中に安定に分散もしくは溶解させる方法としては、例えば下記の方法が利用できる。（１）ポリウレタンポリマーの側鎖または末端に、水酸基、アミノ基、カルボキル基等のイオン性基を導入することにより親水性を付与し自己乳化により水中に分散または溶解する方法；（２）反応の完結したポリマーまたは末端イソシアネート基を、オキシム、アルコール、フェノール、メルカプタン、アミン、重亜硫酸ソーダ等のブロック剤でブロックしたポリマーを、乳化剤と機械的せん断力を用いて強制的に水中に分散する方法；（３）末端イソシアネート基を持つウレタンプレポリマーを、水、乳化剤及び伸長剤と混合し、機械的せん断力を用いて分散化と高分子化を同時に行う方法；（４）ポリウレタン主原料のポリオールとしてポリエチレングリコールのような水溶性ポリオールを使用し、水に可溶なポリウレタンとして水中に分散または溶解する方法が挙げられる。なおポリウレタン樹脂の分子量は特に限定するものではないが、重量平均分子量で１０，０００〜１，０００，０００、好ましくは５０，０００〜５００，０００が好ましい。
上記ポリウレタン樹脂の市販品としては、例えばハイドランＨＷ−３３０、ハイドランＨＷ−３４０、ハイドランＨＷ−３５０（いずれも大日本インキ化学工業社製）、スーパーフレックス１００、スーパーフレックス１１０、スーパーフレックス１５０、スーパーフレックスＦ−８４３８Ｄ、スーパーフレックス４２０（いずれも第一工業製薬社製）、アデカボンタイダーＨＵＸ−２３２、アデカボンタイダーＨＵＸ−２６０、アデカボンタイダーＨＵＸ−３２０、アデカボンタイダーＨＵＸ−３５０、アデカボンタイダーＨＵＸ−５４０、アデカボンタイダーＵＸ−２０６（いずれも旭電化社製）などを挙げることができる。
As a method for stably dispersing or dissolving the polyurethane resin in water, for example, the following method can be used. (1) A method of imparting hydrophilicity by introducing an ionic group such as a hydroxyl group, an amino group, or a carboxy group into the side chain or terminal of a polyurethane polymer, and dispersing or dissolving in water by self-emulsification; A method of forcibly dispersing a completed polymer or a polymer in which a terminal isocyanate group is blocked with a blocking agent such as oxime, alcohol, phenol, mercaptan, amine, sodium bisulfite, etc. in water using an emulsifier and mechanical shearing force; (3) A method in which a urethane prepolymer having a terminal isocyanate group is mixed with water, an emulsifier, and an extender, and simultaneously dispersed and polymerized using mechanical shearing force; (4) As a polyol as a main polyurethane material Using water-soluble polyols such as polyethylene glycol, water-soluble polyurethane as water A method of dispersing or dissolving the like. The molecular weight of the polyurethane resin is not particularly limited, but is preferably 10,000 to 1,000,000, preferably 50,000 to 500,000 in terms of weight average molecular weight.
Examples of commercially available polyurethane resins include Hydran HW-330, Hydran HW-340, Hydran HW-350 (all manufactured by Dainippon Ink and Chemicals), Superflex 100, Superflex 110, Superflex 150, Superflex. F-8438D, Superflex 420 (all manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Adeka Bon Tider HUX-232, Adeka Bon Tider HUX-260, Adeka Bon Tider HUX-320, Adeka Bon Tider HUX-350, Adeka Bon Tider HUX -540, Adekabon Tider UX-206 (all manufactured by Asahi Denka Co., Ltd.) and the like.
本発明では、塗料組成物（ＩＩ）として、上記ポリアクリル酸（Ａ）、ポリエチレンワックス（Ｂ）及び水分散性のポリウレタン樹脂（Ｃ）を、これらの固形分合計に基づいて、ポリアクリル酸（Ａ）を３〜４５質量％、ポリエチレンワックス（Ｂ）を２０〜６２質量％、及び水分散性のポリウレタン樹脂（Ｃ）を３５〜７７質量％の割合で含有することが、耐疵付き性、耐指紋性、導電性の面から必須である。 In the present invention, the polyacrylic acid (A), the polyethylene wax (B), and the water-dispersible polyurethane resin (C) are used as the coating composition (II) based on the total solid content of the polyacrylic acid ( A) is 3 to 45% by mass, polyethylene wax (B) is 20 to 62% by mass, and water-dispersible polyurethane resin (C) is contained in a proportion of 35 to 77% by mass. Essential from the viewpoint of fingerprint resistance and conductivity.
シリコーン系界面活性剤：
本発明のアルミニウム合金用の塗料組成物は、基材への濡れ性向上を目的として、必要に応じてシリコーン系界面活性剤を含有することができる。シリコーン系界面活性剤としては、ポリエステル変性シリコーンやポリエーテル変性シリコーンを用いることが好ましく、ポリエーテル変性ポリジメチルシロキサン又はポリエステル変性ポリジメチルシロキサンを用いることが特に好ましい。具体例としては、ＢＹＫ−３４７、ＢＹＫ−３４８、ＢＹＫ−ＵＶ３５００、ＢＹＫ−３５１０、ＢＹＫ−３５３０、ＢＹＫ−３５７０（ビックケミー・ジャパン株式会社製）などの市販品を挙げることができる。
Silicone surfactant:
The coating composition for an aluminum alloy of the present invention can contain a silicone-based surfactant as necessary for the purpose of improving wettability to a substrate. As the silicone-based surfactant, polyester-modified silicone or polyether-modified silicone is preferably used, and polyether-modified polydimethylsiloxane or polyester-modified polydimethylsiloxane is particularly preferably used. Specific examples include commercially available products such as BYK-347, BYK-348, BYK-UV3500, BYK-3510, BYK-3530, BYK-3570 (manufactured by BYK Japan Japan).
シリコーン系界面活性剤の配合量としては、ポリアクリル酸（Ａ）とポリエチレンワックス（Ｂ）、（及び水分散性のウレタン樹脂（Ｃ））の固形分合計１００質量部に対して、シリコーン系界面活性剤０．１〜１０質量部、好ましくは０．２〜５質量部が、基材への濡れ性向上の為にも好ましい。 The compounding amount of the silicone-based surfactant is based on the silicone-based interface with respect to the total solid content of 100 parts by mass of the polyacrylic acid (A) and the polyethylene wax (B) (and the water-dispersible urethane resin (C)). 0.1 to 10 parts by mass, preferably 0.2 to 5 parts by mass of the activator is also preferable for improving wettability to the substrate.
また、本発明の塗料組成物には、必要に応じて、ポリアクリル酸（Ａ）以外のアクリル樹脂を配合することができる。ポリアクリル酸（Ａ）以外のアクリル樹脂は、ビニル系モノマー混合物を、乳化重合、懸濁重合又は溶液重合し、必要に応じて、中和、水性化した樹脂または該樹脂を変性した樹脂であり、代表例として下記のものを挙げることができる。 Moreover, acrylic resin other than polyacrylic acid (A) can be mix | blended with the coating composition of this invention as needed. The acrylic resin other than polyacrylic acid (A) is a resin obtained by subjecting a vinyl monomer mixture to emulsion polymerization, suspension polymerization or solution polymerization, and neutralizing or making it water-based or modifying the resin as necessary. As typical examples, the following can be mentioned.
（１）乳化剤又は高分子量樹脂分散安定剤の存在下で、水中にてビニル系モノマー混合物を乳化重合した水分散性樹脂。
（２）有機溶剤中にて、カルボキシル基含有モノマー又はアミノ基含有モノマーを含有するビニル系モノマー混合物を溶液重合し、塩基又は酸である中和剤にて中和し、水性化した水分散性樹脂、が挙げられる。
(1) A water dispersible resin obtained by emulsion polymerization of a vinyl monomer mixture in water in the presence of an emulsifier or a high molecular weight resin dispersion stabilizer.
(2) Solution-polymerization of a vinyl monomer mixture containing a carboxyl group-containing monomer or amino group-containing monomer in an organic solvent, neutralized with a neutralizer that is a base or an acid, and water-dispersed water dispersibility Resin.
上記アクリル樹脂の作成のために使用されるビニル系モノマーとしては、例えば（メタ）アクリル酸メチル、（メタ）アクリル酸エチル、（メタ）アクリル酸ｎ−プロピル、（メタ）アクリル酸イソプロピル、（メタ）アクリル酸ブチル（ｎ−，ｉ−，ｔ−）、（メタ）アクリル酸ヘキシル、（メタ）アクリル酸２−エチルヘキシル、（メタ）アクリル酸ｎ−オクチル、（メタ）アクリル酸デシル、（メタ）アクリル酸ラウリル、（メタ）アクリル酸ステアリル、（メタ）アクリル酸シクロヘキシル等のアクリル酸又はメタクリル酸の炭素数１〜１８（１〜２４）のアルキルエステル又はシクロアルキルエステル；（メタ）アクリル酸メトキシブチル、（メタ）アクリル酸メトキシエチル、（メタ）アクリル酸エトキシブチル等のアクリル酸又はメタクリル酸の炭素数２〜１８のアルコキシアルキルエステル；アクリル酸、メタクリル酸、クロトン酸、イタコン酸、マレイン酸、フマル酸等のカルボキシル基含有不飽和モノマー；２−ヒドロキシエチル（メタ）アクリレート、２−又は３−ヒドロキシプロピル（メタ）アクリレート等のアクリル酸又はメタクリル酸の炭素数２〜８のヒドロキシアルキルエステル；Ｎ，Ｎ−ジメチルアミノエチル（メタ）アクリレ−ト、Ｎ，Ｎ−ジエチルアミノエチル（メタ）アクリレート等の含窒素アルキル（メタ）アクリレート；アクリルアミド、メタクリルアミド、Ｎ−ブトキシメチル（メタ）アクリルアミド、Ｎ，Ｎ−ジメチルアミノプロピル（メタ）アクリルアミド、Ｎ，Ｎ−ジメチルアミノエチル（メタ）アクリルアミド等の重合性アミド類；グリシジル（メタ）アクリレート、アリルグリシジルエーテル等のエポキシ基含有不飽和モノマー；酢酸ビニル、スチレン、α−メチルスチレン、ビニルトルエン、α−クロロスチレン、アクリロニトリル等を挙げることができる。これらは１種又は２種以上混合して用いることができる。 Examples of vinyl monomers used for the preparation of the acrylic resin include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, (meth ) Butyl acrylate (n-, i-, t-), hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, decyl (meth) acrylate, (meth) C1-C18 (1-24) alkyl ester or cycloalkyl ester of acrylic acid or methacrylic acid such as lauryl acrylate, stearyl (meth) acrylate, cyclohexyl (meth) acrylate; methoxybutyl (meth) acrylate Acrylic acid such as methoxyethyl (meth) acrylate and ethoxybutyl (meth) acrylate Is an alkoxyalkyl ester of methacrylic acid having 2 to 18 carbon atoms; carboxyl group-containing unsaturated monomer such as acrylic acid, methacrylic acid, crotonic acid, itaconic acid, maleic acid, fumaric acid; 2-hydroxyethyl (meth) acrylate, 2 -Or C2-C8 hydroxyalkyl ester of acrylic acid or methacrylic acid such as 3-hydroxypropyl (meth) acrylate; N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl (meta ) Nitrogen-containing alkyl (meth) acrylates such as acrylate; acrylamide, methacrylamide, N-butoxymethyl (meth) acrylamide, N, N-dimethylaminopropyl (meth) acrylamide, N, N-dimethylaminoethyl (meth) acrylamide, etc. Polymerizable a Earth; glycidyl (meth) acrylate, epoxy group-containing unsaturated monomers such as allyl glycidyl ether, vinyl acetate, styrene, alpha-methyl styrene, vinyl toluene, alpha-chlorostyrene, and acrylonitrile. These can be used alone or in combination.
さらに、本発明の塗料組成物には、必要に応じて、顔料、顔料分散剤、流動性調整剤、レベリング剤、ワキ防止剤、防腐剤、有機溶剤、樹脂粒子、安定化剤等を配合することができる。 Furthermore, the coating composition of the present invention is blended with a pigment, a pigment dispersant, a fluidity modifier, a leveling agent, an anti-bacterial agent, an antiseptic, an organic solvent, resin particles, a stabilizer, and the like as necessary. be able to.
皮膜形成方法について
本発明の塗料組成物を塗装するアルミニウム合金板は、ＣＤ−ＲＯＭドライブ用の電子機器筐体などで何度もドライブを出し入れするのに要求される強度、及び加工性を備えた種々のアルミニウム合金板が挙げられる。なお塗装に際して、上記アルミニウム合金板を脱脂し、リン酸クロメート等で化成処理を施すことが望ましい。
具体的には、強度、耐食性の他、シャッター材に必要な、曲げ成形性にも優れ、合成樹脂系塗膜を形成して塗膜密着性、色彩性、耐指紋性、摺動性が良好なアルミニウム合金板が挙げられ、例えばＡｌ−Ｍｇ系合金板、とくにＭｇ３．０〜６．０ ％（質量％、以下同じ）を主要合金成分として含有し、必要に応じてＭｎ１．５％以下、Ｃｒ０．３ ％以下、Ｃｕ０．５％以下、Ｔｉ０．１％以下のうちの１種以上を含む、アルミニウム合金板が好適に使用できる。
Regarding the film forming method, the aluminum alloy plate to which the coating composition of the present invention is applied has the strength and workability required to insert and remove the drive many times in an electronic device casing for a CD-ROM drive. Various aluminum alloy plates are mentioned. In the coating, it is desirable to degrease the aluminum alloy plate and perform chemical conversion treatment with phosphoric acid chromate or the like.
Specifically, in addition to strength and corrosion resistance, it also has excellent bend formability, which is necessary for shutter materials, and forms a synthetic resin-based coating film that provides good coating adhesion, color, fingerprint resistance, and slidability. For example, an Al—Mg alloy plate, particularly Mg 3.0 to 6.0% (mass%, hereinafter the same) is contained as a main alloy component, and if necessary, Mn 1.5% or less, An aluminum alloy plate containing one or more of Cr 0.3% or less, Cu 0.5% or less, and Ti 0.1% or less can be suitably used.
本発明のアルミニウム合金用の塗料組成物を用いた塗膜形成は、上記アルミニウム合金板上に、アルミニウム合金用の塗料組成物を塗装し乾燥させることによって塗膜を形成することができる。塗装方法は、例えば、浸漬塗装、シャワー塗装、スプレー塗装、ロール塗装、電着塗装などによって塗装することができる。 The coating film formation using the coating composition for an aluminum alloy of the present invention can form a coating film by coating the aluminum alloy coating composition on the aluminum alloy plate and drying it. The coating method can be applied by, for example, dip coating, shower coating, spray coating, roll coating, electrodeposition coating, or the like.
上記塗膜の乾燥条件は、通常、素材到達最高温度が６０〜２５０℃となる条件で、２秒間〜３０分間乾燥させることが好適である。また、導電性確保の点から乾燥膜厚は、０．０５〜１．０μｍ、特に０．１〜０．３μｍの範囲の薄膜であることが望ましい、本発明の塗料組成物によれば、かかる薄膜であっても耐疵付き性、耐指紋性に優れた皮膜を形成できる。 As for the drying conditions of the said coating film, it is suitable to make it dry normally for 2 second-30 minutes on the conditions from which a raw material highest temperature becomes 60-250 degreeC. Moreover, according to the coating composition of the present invention, the dry film thickness is preferably 0.05 to 1.0 μm, particularly preferably 0.1 to 0.3 μm from the viewpoint of ensuring conductivity. Even a thin film can form a film excellent in scratch resistance and fingerprint resistance.
以下、製造例、実施例及び比較例により、本発明をさらに詳細に説明するが、本発明はこれに限定されるものではない。各例中の「部」は質量部、「％」は質量％を示す。 Hereinafter, the present invention will be described in more detail with reference to Production Examples, Examples, and Comparative Examples, but the present invention is not limited thereto. In the examples, “parts” represents parts by mass, and “%” represents mass%.
製造例１ ポリアクリル酸Ｎｏ．１水溶液の製造
重量平均分子量が５，０００のポリアクリル酸（注１）８０部を水５３３部に溶解させ、固形分１５％のポリアクリル酸Ｎｏ．１水溶液を得た。
（注１）和光純薬（株）製のポリアクリル酸、重量平均分子量５，０００、酸価７７９ｍｇＫＯＨ／ｇ、試薬。
Production Example 1 Polyacrylic acid No. 1 Preparation of 1 aqueous solution 80 parts of polyacrylic acid (Note 1) having a weight average molecular weight of 5,000 was dissolved in 533 parts of water, and polyacrylic acid No. 1 having a solid content of 15% was dissolved. 1 aqueous solution was obtained.
(Note 1) Polyacrylic acid manufactured by Wako Pure Chemical Industries, Ltd., weight average molecular weight 5,000, acid value 779 mgKOH / g, reagent.
製造例２ ポリアクリル酸Ｎｏ．２水溶液の製造
重量平均分子量が２５，０００のポリアクリル酸（注２）８０部を水５３３部に溶解させ、固形分１５％のポリアクリル酸Ｎｏ．２水溶液を得た。
Production Example 2 Polyacrylic acid No. 1 Preparation of aqueous solution 80 parts of polyacrylic acid (Note 2) having a weight average molecular weight of 25,000 was dissolved in 533 parts of water, and polyacrylic acid No. 1 having a solid content of 15% was dissolved. Two aqueous solutions were obtained.
（注２）和光純薬（株）製のポリアクリル酸、重量平均分子量２５，０００、酸価７７９ｍｇＫＯＨ／ｇ、試薬。 (Note 2) Polyacrylic acid manufactured by Wako Pure Chemical Industries, Ltd., weight average molecular weight 25,000, acid value 779 mgKOH / g, reagent.
製造例３ ポリアクリル酸Ｎｏ．３水溶液の製造
重量平均分子量が２５０，０００のポリアクリル酸（注３）８０部を水５３３部に溶解させ、固形分１５％のポリアクリル酸Ｎｏ．３水溶液を得た。
Production Example 3 Polyacrylic acid No. 1 3 aqueous solution of polyacrylic acid (Note 3) having a weight average molecular weight of 250,000 was dissolved in 533 parts of water, and polyacrylic acid No. 3 having a solid content of 15% was dissolved. Three aqueous solutions were obtained.
（注３）和光純薬（株）製のポリアクリル酸、重量平均分子量２５０，０００、酸価７７９ｍｇＫＯＨ／ｇ、試薬。 (Note 3) Polyacrylic acid manufactured by Wako Pure Chemical Industries, Ltd., weight average molecular weight 250,000, acid value 779 mgKOH / g, reagent.
製造例４ ポリアクリル酸Ｎｏ．４水溶液の製造
重量平均分子量が１，０００，０００のポリアクリル酸（注４）８０部を水５３３部に溶解させ、固形分１５％のポリアクリル酸Ｎｏ．４水溶液を得た。
Production Example 4 Polyacrylic acid No. 4 4. Preparation of aqueous solution 80 parts of polyacrylic acid (Note 4) having a weight average molecular weight of 1,000,000 was dissolved in 533 parts of water, and polyacrylic acid No. 1 having a solid content of 15% was dissolved. Four aqueous solutions were obtained.
（注４）和光純薬（株）製のポリアクリル酸、重量平均分子量１，０００，０００、酸価７７９ｍｇＫＯＨ／ｇ、試薬。 (Note 4) Polyacrylic acid manufactured by Wako Pure Chemical Industries, Ltd., weight average molecular weight 1,000,000, acid value 779 mgKOH / g, reagent.
製造例５ ポリアクリル酸Ｎｏ．５水溶液（中和タイプ）の製造
重量平均分子量が２５，０００のポリアクリル酸（注２）８０部を水５３３部に溶解させ、さらに２５％アンモニア水７１．３部を加えた後に３０分攪拌し、固形分１４．３％のポリアクリル酸Ｎｏ．５水溶液（中和タイプ）を得た。
Production Example 5 Polyacrylic acid No. Production of 5 aqueous solution (neutralization type) 80 parts of polyacrylic acid (Note 2) having a weight average molecular weight of 25,000 was dissolved in 533 parts of water, and further 71.3 parts of 25% aqueous ammonia was added and stirred for 30 minutes. Polyacrylic acid No. 1 having a solid content of 14.3%. 5 aqueous solution (neutralization type) was obtained.
製造例６ カルボキシル基含有アクリル樹脂Ｎｏ．１溶液の製造
ｎ−ブタノール８５０部を窒素気流下で１００℃に加熱し、単量体混合物及び重合開始剤「メタクリル酸４５０部、スチレン４５０部、エチルアクリレート１００部、ｔ−ブチルパーオキシ−２−エチルヘキサノエート ４０部」を３時間で滴下し、滴下後１時間熟成した。
次いで、ｔ−ブチルパーオキシ−２−エチルヘキサノエート１０部とｎ−ブタノール１００部との混合溶液を３０分間かけて滴下し、滴下後２時間熟成した。次いで、ｎ−ブタノール９３３部、エチレングリコールモノブチルエーテル４００部を加え、固形分約３０％のカルボキシル基含有アクリル樹脂Ｎｏ．１を得た。得られた樹脂は、樹脂酸価３００ｍｇＫＯＨ／ｇ、重量平均分子量約１７，０００を有していた。
Production Example 6 Carboxyl group-containing acrylic resin 1 Preparation of solution 850 parts of n-butanol were heated to 100 ° C. under a nitrogen stream, and the monomer mixture and polymerization initiator “450 parts of methacrylic acid, 450 parts of styrene, 100 parts of ethyl acrylate, t-butylperoxy-2” -40 parts of ethylhexanoate "was added dropwise over 3 hours, and the mixture was aged for 1 hour after the addition.
Next, a mixed solution of 10 parts of t-butylperoxy-2-ethylhexanoate and 100 parts of n-butanol was added dropwise over 30 minutes, followed by aging for 2 hours. Subsequently, 933 parts of n-butanol and 400 parts of ethylene glycol monobutyl ether were added, and carboxyl group-containing acrylic resin No. 1 having a solid content of about 30% was added. 1 was obtained. The obtained resin had a resin acid value of 300 mgKOH / g and a weight average molecular weight of about 17,000.
製造例７ カルボキシル基含有アクリル樹脂Ｎｏ．２溶液の製造
ｎ−ブタノール１，４００部を窒素気流下で１００℃に加熱し、単量体混合物及び重合開始剤「メタクリル酸 ６７０部、スチレン２５０部、エチルアクリレート８０部、ｔ−ブチルパーオキシ−２−エチルヘキサノエート５０部 」を３時間で滴下し、滴下後１時間熟成した。次いで、 ｔ−ブチルパーオキシ−２−エチルヘキサノエート１０部とｎ−ブタノール１００部との混合溶液を３０分間かけて滴下し、滴下後２時間熟成した。次いで、 ｎ−ブタノール３７３部、エチレングリコールモノブチルエーテル４００部を加え、固形分約３０％のカルボキシル基含有アクリル樹脂Ｎｏ．２を得た。得られた樹脂は、樹脂酸価４５０ｍｇＫＯＨ／ｇ、重量平均分子量約１４，０００を有していた。
Production Example 7 Carboxyl group-containing acrylic resin Preparation of two solutions 1,400 parts of n-butanol were heated to 100 ° C. under a nitrogen stream, and the monomer mixture and the polymerization initiators “670 parts of methacrylic acid, 250 parts of styrene, 80 parts of ethyl acrylate, t-butylperoxy” 2-ethylhexanoate 50 parts "was added dropwise in 3 hours, and the mixture was aged for 1 hour. Next, a mixed solution of 10 parts of t-butylperoxy-2-ethylhexanoate and 100 parts of n-butanol was added dropwise over 30 minutes, followed by aging for 2 hours. Next, 373 parts of n-butanol and 400 parts of ethylene glycol monobutyl ether were added, and carboxyl group-containing acrylic resin No. 1 having a solid content of about 30% was added. 2 was obtained. The obtained resin had a resin acid value of 450 mgKOH / g and a weight average molecular weight of about 14,000.
アルミニウム合金用の塗料組成物の製造
実施例１
製造例１で得たポリアクリル酸Ｎｏ．１を６０部（固形分）、ＨＩ−ＤＩＳＰＥＲ ＡＥ−０４（注５）４０部（固形分）を加え、さらに脱イオン水で固形分を調整して、固形分２．５質量％のアルミニウム合金用の塗料組成物Ｎｏ．
１を得た。
（注５）ＨＩ−ＤＩＳＰＥＲ ＡＥ−０４：岐阜セラック社製、商品名、ポリエチレンワックスの水分散体、平均粒径：２．５μｍ。
Manufacture of paint compositions for aluminum alloys
Example 1
Polyacrylic acid No. 1 obtained in Production Example 1. 60 parts (solid content) 1 and HI-DISPER AE-04 (Note 5) 40 parts (solid content) were added, and the solid content was adjusted with deionized water to obtain an aluminum alloy having a solid content of 2.5% by mass. Coating composition No.
1 was obtained.
(Note 5) HI-DISPER AE-04: manufactured by Gifu Shellac Co., Ltd., trade name, water dispersion of polyethylene wax, average particle size: 2.5 μm.
実施例２〜２１
下記表１及び表２に示す配合に従って各成分を攪拌機で十分に混合し、脱イオン水を加えて固形分を調整し、固形分２．５質量％のアルミニウム合金用の塗料組成物Ｎｏ．２〜Ｎｏ．２１を作成した。
Examples 2 to 21
Each component is sufficiently mixed with a stirrer according to the formulation shown in Tables 1 and 2 below, deionized water is added to adjust the solid content, and the coating composition No. 2-No. 21 was created.
（注６）ＨＩ−ＤＩＳＰＥＲ Ａ−５１４：岐阜セラック社製、商品名、ポリエチレンワックスの水分散体、平均粒径０．５μｍ
（注７）ＨＩ−ＤＩＳＰＥＲ Ａ−３３２：岐阜セラック社製、商品名、ポリエチレンワックスの水分散体、平均粒径２．５μｍ
（注８）アデカポンタイダーＵＸ−２０６：アデカ社製、商品名、ポリウレタン樹脂の水分散体
（注９）アデカポンタイダーＨＵＸ−５４０：アデカ社製、商品名、ポリウレタン樹脂の水分散体
（注１０）スーパーフレックス１５０：第一工業製薬社製、商品名、ポリウレタン樹脂の水分散体
（注１１）スーパーフレックス５００：第一工業製薬社製、商品名、ポリウレタン樹脂の水分散体
（注１２）ＢＹＫ−３４８：ビックケミー・ジャパン株式会社製、商品名、シリコン系界面活性剤。
(Note 6) HI-DISPER A-514: Gifu Shellac Co., Ltd., trade name, water dispersion of polyethylene wax, average particle size 0.5 μm
(Note 7) HI-DISPER A-332: manufactured by Gifu Shellac Co., Ltd., trade name, water dispersion of polyethylene wax, average particle size 2.5 μm
(Note 8) Adekapon Tider UX-206: Made by Adeka, trade name, polyurethane resin aqueous dispersion (Note 9) Adeka Pontideer HUX-540: Made by Adeka, trade name, polyurethane resin aqueous dispersion (Note 10) Superflex 150: Daiichi Kogyo Seiyaku Co., Ltd., trade name, polyurethane resin aqueous dispersion (Note 11) Superflex 500: Daiichi Kogyo Seiyaku Co., Ltd., trade name, polyurethane resin aqueous dispersion (Note 12) BYK-348: manufactured by Big Chemie Japan, trade name, silicon-based surfactant.
比較例１〜１４
下記表３に示す配合に従って各成分を攪拌機で十分に混合し、脱イオン水を加えて固形分を調整して、固形分２．５％のアルミニウム合金用の塗料組成物Ｎｏ．２２〜Ｎｏ．３５を作成した。
Comparative Examples 1-14
Each component was sufficiently mixed with a stirrer in accordance with the formulation shown in Table 3 below, deionized water was added to adjust the solid content, and the coating composition No. 22-No. 35 was created.
（注１３）ＨＬ−４１５：日本触媒社製、ポリアクリル酸、重量平均分子量１，
０００
（注１４）ＨＩ−ＤＩＳＰＥＲ ＸＤ−０７５：岐阜セラック社製、商品名、
カルナバワックス
（注１５）ＨＩ−ＤＩＳＰＥＲ Ｘ−８５１２：岐阜セラック社製、商品名、
ラノリンワックス
（注１６）ＨＩ−ＤＩＳＰＥＲ ＡＤ−６２：岐阜セラック社製、商品名、パラフィンワックス。
(Note 13) HL-415: manufactured by Nippon Shokubai Co., Ltd., polyacrylic acid, weight average molecular weight 1,
000
(Note 14) HI-DISPER XD-075: Gifu Shellac Co., Ltd., trade name,
Carnauba wax (Note 15) HI-DISPER X-8512: manufactured by Gifu Shellac Co., Ltd., trade name,
Lanolin wax (Note 16) HI-DISPER AD-62: Gifu Shellac Co., Ltd., trade name, paraffin wax.
試験板の作成
アルミニウム合金板（材質：ＪＩＳ Ａ５０５２、板厚：０．６ｍｍ）の両面を、市販のアルミニウム用脱脂剤にて脱脂処理を行い、水洗後に、市販のリン酸クロメート処理液により両面を化成処理した。次いで、一方の化成処理面のみにアルミニウム合金用の塗料組成物Ｎｏ．１〜Ｎｏ．３５を塗装し、被塗物の最高到達温度（ＰＭＴ）１７０℃で６秒間乾燥して、乾燥膜厚０．２μｍの試験板Ｎｏ．１〜Ｎｏ．３５を得た。
各々の試験板を用いて、下記に述べる試験方法に従って試験に供した結果を表４〜表６に示す。
Preparation of test plate Both surfaces of an aluminum alloy plate (material: JIS A5052, plate thickness: 0.6 mm) were degreased with a commercially available aluminum degreasing agent, washed with water, and then washed with a commercially available phosphoric acid chromate treatment solution. Chemical conversion treatment. Subsequently, the coating composition No. for aluminum alloy was applied only to one chemical conversion treatment surface. 1-No. 35, and dried for 6 seconds at a maximum temperature (PMT) 170 ° C. of the object to be coated. 1-No. 35 was obtained.
Tables 4 to 6 show the results of the test using each test plate according to the test method described below.
（注１７）導電性：
アルミニウム合金用の塗料組成物を塗布し形成された皮膜表面と反対面にテスターの端子を接続し、皮膜形成表面にもう一方のテスターの端子を接続し、真鍮棒に２０ｇ重の荷重で接触させ、この状態で電気抵抗を測定した。つまり、皮膜形成されたアルミニウム材の皮膜表面にテスター端子を２０ｇ重の荷重で接触させ、この端子と母材のアルミニウム材との間の電気抵抗値を測定した。
テスターはカスタム社製のＣＸ２７０Ｎを用い、テスターの内部抵抗の影響を取り除く為、測定前にテスターの端子同士を接触させた状態でゼロ点補正を行った。また、測定にはテスターにおける最も敏感なレンジを使用し、テスターの表示が止まったときの抵抗値を測定値とした。測定は任意に１０箇所について行い、通電した回数とその平均値を採用した。
(Note 17) Conductivity:
The tester terminal is connected to the surface opposite to the coating surface formed by applying the coating composition for the aluminum alloy, the other tester terminal is connected to the coating surface, and the brass rod is brought into contact with a 20 g load. In this state, the electrical resistance was measured. That is, a tester terminal was brought into contact with the surface of the aluminum film on which the film was formed with a load of 20 g, and the electrical resistance value between the terminal and the aluminum material of the base material was measured.
The tester used CX270N made by Custom Co., Ltd., and zero point correction was performed with the terminals of the tester in contact with each other before measurement in order to remove the influence of the internal resistance of the tester. In addition, the most sensitive range in the tester was used for measurement, and the resistance value when the display of the tester stopped was taken as the measurement value. The measurement was arbitrarily performed at 10 locations, and the number of energizations and the average value thereof were adopted.
〇は、通電回数が１０回で、かつその電気抵抗値の平均値が２Ω未満で導電性が良好である。 O indicates that the number of energizations is 10, and the average electrical resistance value is less than 2Ω, and the conductivity is good.
△は、通電回数が７回以上９回以下か、もしくは通電回数の電気抵抗値の平均値が２Ω以上で、かつ５Ω未満である
×は、通電回数が６回以下、もしくは通電回数の電気抵抗値の平均値が５Ω以上で、導電性が不十分である。
Δ is the number of energizations is 7 or more and 9 or less, or the average value of the electrical resistance value of the energization times is 2Ω or more and less than 5Ω. × is the electrical resistance of the energization frequency is 6 times or less or the energization frequency The average value is 5Ω or more, and the conductivity is insufficient.
（注１８）耐指紋性：
各試験板の皮膜形成面を素手で触った際に指紋が付着する前後の色差（ΔＥ値）を測定することで、耐指紋付着性を評価した。色差は色彩色差計（ミノルタ社製ＣＲ−３００型）を用いて測定した。
◎は、色差（ΔＥ値）が０．５以下、
〇は、色差（ΔＥ値）が０．５を超えて、かつ０．６以下、
△は、色差（ΔＥ値）が０．６を超えて、かつ０．７以下、
×は、色差（ΔＥ値）が０．７を超える。
(Note 18) Fingerprint resistance:
The fingerprint resistance was evaluated by measuring the color difference (ΔE value) before and after the fingerprint adhered when the film-formed surface of each test plate was touched with bare hands. The color difference was measured using a color difference meter (CR-300 manufactured by Minolta).
◎ indicates a color difference (ΔE value) of 0.5 or less,
◯ indicates that the color difference (ΔE value) exceeds 0.5 and is 0.6 or less.
Δ is a color difference (ΔE value) exceeding 0.6 and 0.7 or less,
In x, the color difference (ΔE value) exceeds 0.7.
（注１９）耐疵付き性試験：
耐疵付き性試験はバウデン式摩擦試験機を使用して行なった。耐傷付け性試験において、試験片と鋼球（直径４．７６ｍｍ＝３／１６インチ）の位置関係を模式的に図１に示す。
図１おいて、１は鋼球、２は試験片、３は架台である。試験片２は、各試験板を１５ｍｍ×１５０ｍｍの短冊状に切断したものである。その試験片を平面の一軸方向に移動可能な架台３上に重ねて載置し、荷重検出器が設置された鋼球を先端部に有するアームを試験片の上に配置して１ｋｇ重の荷重を印加した。架台３の移動速度は３．５ｍｍ／秒とし、架台３を一軸方向に移動させることによる皮膜形成されたアルミニウム材上を鋼球が滑る。
移動距離が３５ｍｍとなった時点で往復するように試験機を設定し、２０往復させた時点での疵が形成されているかどうか評価した。疵の評価は触針式の凹凸計（αステップ ＡＳ−５００型）を用いた。評価方法について具体的に記す。バウデン式摩擦試験機にて疵を付けた各試験板の疵部に対し、垂直方向に針をスキャンさせて、スキャン速度：５０μｍ／秒の速さで表面の凹凸を測定する。このときのＲａを測定することで行った。
耐疵付き性評価は、
◎は、Ｒａの値が７０ｎｍ未満、
〇は、Ｒａの値が７０ｎｍ以上で、かつ１００ｎｍ未満、
△は、Ｒａの値が１００ｎｍ以上で、かつ２００ｎｍ未満、
×は、Ｒａの値が２００ｎｍ以上
(Note 19) Scratch resistance test:
The scratch resistance test was performed using a Bowden friction tester. In the scratch resistance test, the positional relationship between the test piece and the steel ball (diameter 4.76 mm = 3/16 inch) is schematically shown in FIG.
In FIG. 1, 1 is a steel ball, 2 is a test piece, and 3 is a mount. The test piece 2 is obtained by cutting each test plate into 15 mm × 150 mm strips. The test piece is placed on a pedestal 3 movable in a uniaxial direction on a plane, and a load having a weight of 1 kg is placed on the test piece by placing an arm having a steel ball with a load detector on its tip. Was applied. The moving speed of the gantry 3 is 3.5 mm / second, and the steel ball slides on the aluminum material on which the film is formed by moving the gantry 3 in the uniaxial direction.
The test machine was set so as to reciprocate when the moving distance reached 35 mm, and it was evaluated whether or not wrinkles were formed when it was reciprocated 20 times. For evaluation of the wrinkles, a stylus-type unevenness meter (α step AS-500 type) was used. The evaluation method will be specifically described. A needle is scanned in the vertical direction with respect to the heel portion of each test plate with a ridge by a Bowden friction tester, and the surface unevenness is measured at a scanning speed of 50 μm / second. The measurement was performed by measuring Ra at this time.
Scratch resistance evaluation is
◎, Ra value is less than 70nm,
◯ indicates that Ra is 70 nm or more and less than 100 nm,
Δ is that Ra is 100 nm or more and less than 200 nm,
X: Ra value is 200 nm or more
薄膜で導電性が良好で、かつ耐疵付き性や耐指紋性に優れる電子機器部品を提供できる。 It is possible to provide an electronic device component that is a thin film, has good conductivity, and has excellent scratch resistance and fingerprint resistance.
１．バウデン鋼球を示す
２．試験片を示す
３．架台を示す
1. Shows Bauden steel ball. 2. Indicates a test piece. Show the mount
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Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |