JP4790902B2 - Water-based paint composition - Google Patents
Water-based paint composition Download PDFInfo
- Publication number
- JP4790902B2 JP4790902B2 JP2000352086A JP2000352086A JP4790902B2 JP 4790902 B2 JP4790902 B2 JP 4790902B2 JP 2000352086 A JP2000352086 A JP 2000352086A JP 2000352086 A JP2000352086 A JP 2000352086A JP 4790902 B2 JP4790902 B2 JP 4790902B2
- Authority
- JP
- Japan
- Prior art keywords
- acid
- diisocyanate
- component
- glycol
- coating film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000003973 paint Substances 0.000 title claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 9
- 239000000203 mixture Substances 0.000 title description 14
- 238000000576 coating method Methods 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 40
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 40
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims description 24
- 229920001225 polyester resin Polymers 0.000 claims description 20
- 239000004645 polyester resin Substances 0.000 claims description 20
- 229920002554 vinyl polymer Polymers 0.000 claims description 19
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 17
- 229920000877 Melamine resin Polymers 0.000 claims description 12
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 230000009477 glass transition Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 9
- 239000004640 Melamine resin Substances 0.000 claims description 7
- 239000008199 coating composition Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000003431 cross linking reagent Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims 1
- 230000007704 transition Effects 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 description 30
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 21
- 239000005056 polyisocyanate Substances 0.000 description 21
- 229920001228 polyisocyanate Polymers 0.000 description 21
- -1 alicyclic dicarboxylic acids Chemical class 0.000 description 19
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 14
- 239000000178 monomer Substances 0.000 description 13
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 239000002253 acid Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 9
- 239000002981 blocking agent Substances 0.000 description 8
- 150000005846 sugar alcohols Polymers 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 6
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 150000008064 anhydrides Chemical class 0.000 description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 5
- 125000005442 diisocyanate group Chemical group 0.000 description 5
- 239000000049 pigment Substances 0.000 description 5
- 150000007519 polyprotic acids Polymers 0.000 description 5
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- 239000002585 base Substances 0.000 description 4
- 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 4
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 4
- 229960002887 deanol Drugs 0.000 description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 4
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 4
- 229920005862 polyol Polymers 0.000 description 4
- 150000003077 polyols Chemical class 0.000 description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- GAWIXWVDTYZWAW-UHFFFAOYSA-N C[CH]O Chemical group C[CH]O GAWIXWVDTYZWAW-UHFFFAOYSA-N 0.000 description 3
- AEMRFAOFKBGASW-UHFFFAOYSA-N Glycolic acid Chemical compound OCC(O)=O AEMRFAOFKBGASW-UHFFFAOYSA-N 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 239000001361 adipic acid Substances 0.000 description 3
- 235000011037 adipic acid Nutrition 0.000 description 3
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 3
- 125000002091 cationic group Chemical group 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 239000012972 dimethylethanolamine Substances 0.000 description 3
- 150000002009 diols Chemical class 0.000 description 3
- 238000004070 electrodeposition Methods 0.000 description 3
- 238000005886 esterification reaction Methods 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 201000006747 infectious mononucleosis Diseases 0.000 description 3
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 3
- 230000003472 neutralizing effect Effects 0.000 description 3
- 229920001748 polybutylene Polymers 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 3
- RMVRSNDYEFQCLF-UHFFFAOYSA-N thiophenol Chemical compound SC1=CC=CC=C1 RMVRSNDYEFQCLF-UHFFFAOYSA-N 0.000 description 3
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 3
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 3
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- NNOZGCICXAYKLW-UHFFFAOYSA-N 1,2-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC=C1C(C)(C)N=C=O NNOZGCICXAYKLW-UHFFFAOYSA-N 0.000 description 2
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 2
- UNVGBIALRHLALK-UHFFFAOYSA-N 1,5-Hexanediol Chemical compound CC(O)CCCCO UNVGBIALRHLALK-UHFFFAOYSA-N 0.000 description 2
- PMBXCGGQNSVESQ-UHFFFAOYSA-N 1-Hexanethiol Chemical compound CCCCCCS PMBXCGGQNSVESQ-UHFFFAOYSA-N 0.000 description 2
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 description 2
- GJYCVCVHRSWLNY-UHFFFAOYSA-N 2-butylphenol Chemical compound CCCCC1=CC=CC=C1O GJYCVCVHRSWLNY-UHFFFAOYSA-N 0.000 description 2
- YIWUKEYIRIRTPP-UHFFFAOYSA-N 2-ethylhexan-1-ol Chemical compound CCCCC(CC)CO YIWUKEYIRIRTPP-UHFFFAOYSA-N 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- KXDAEFPNCMNJSK-UHFFFAOYSA-N Benzamide Chemical compound NC(=O)C1=CC=CC=C1 KXDAEFPNCMNJSK-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-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
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 150000001299 aldehydes Chemical class 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- 229920003180 amino resin Polymers 0.000 description 2
- HUMNYLRZRPPJDN-UHFFFAOYSA-N benzaldehyde Chemical compound O=CC1=CC=CC=C1 HUMNYLRZRPPJDN-UHFFFAOYSA-N 0.000 description 2
- QMKYBPDZANOJGF-UHFFFAOYSA-N benzene-1,3,5-tricarboxylic acid Chemical compound OC(=O)C1=CC(C(O)=O)=CC(C(O)=O)=C1 QMKYBPDZANOJGF-UHFFFAOYSA-N 0.000 description 2
- PXKLMJQFEQBVLD-UHFFFAOYSA-N bisphenol F Chemical class C1=CC(O)=CC=C1CC1=CC=C(O)C=C1 PXKLMJQFEQBVLD-UHFFFAOYSA-N 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- WQAQPCDUOCURKW-UHFFFAOYSA-N butanethiol Chemical compound CCCCS WQAQPCDUOCURKW-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000011258 core-shell material Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 2
- 239000000539 dimer Substances 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- LZCLXQDLBQLTDK-UHFFFAOYSA-N ethyl 2-hydroxypropanoate Chemical compound CCOC(=O)C(C)O LZCLXQDLBQLTDK-UHFFFAOYSA-N 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- 125000001841 imino group Chemical group [H]N=* 0.000 description 2
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 description 2
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 description 2
- 150000002596 lactones Chemical class 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 2
- 239000011976 maleic acid Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- WHIVNJATOVLWBW-UHFFFAOYSA-N n-butan-2-ylidenehydroxylamine Chemical compound CCC(C)=NO WHIVNJATOVLWBW-UHFFFAOYSA-N 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- IXQGCWUGDFDQMF-UHFFFAOYSA-N o-Hydroxyethylbenzene Natural products CCC1=CC=CC=C1O IXQGCWUGDFDQMF-UHFFFAOYSA-N 0.000 description 2
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- FIWHJQPAGLNURC-UHFFFAOYSA-N oxiran-2-ylmethyl 7,7-dimethyloctanoate Chemical compound CC(C)(C)CCCCCC(=O)OCC1CO1 FIWHJQPAGLNURC-UHFFFAOYSA-N 0.000 description 2
- 150000002924 oxiranes Chemical class 0.000 description 2
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 2
- WLJVNTCWHIRURA-UHFFFAOYSA-N pimelic acid Chemical compound OC(=O)CCCCCC(O)=O WLJVNTCWHIRURA-UHFFFAOYSA-N 0.000 description 2
- XUWHAWMETYGRKB-UHFFFAOYSA-N piperidin-2-one Chemical compound O=C1CCCCN1 XUWHAWMETYGRKB-UHFFFAOYSA-N 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N propane-1,3-diol Chemical compound OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- WGYKZJWCGVVSQN-UHFFFAOYSA-N propylamine Chemical compound CCCN WGYKZJWCGVVSQN-UHFFFAOYSA-N 0.000 description 2
- CYIDZMCFTVVTJO-UHFFFAOYSA-N pyromellitic acid Chemical compound OC(=O)C1=CC(C(O)=O)=C(C(O)=O)C=C1C(O)=O CYIDZMCFTVVTJO-UHFFFAOYSA-N 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- TYFQFVWCELRYAO-UHFFFAOYSA-N suberic acid Chemical compound OC(=O)CCCCCCC(O)=O TYFQFVWCELRYAO-UHFFFAOYSA-N 0.000 description 2
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- ARCGXLSVLAOJQL-UHFFFAOYSA-N trimellitic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C(C(O)=O)=C1 ARCGXLSVLAOJQL-UHFFFAOYSA-N 0.000 description 2
- GETQZCLCWQTVFV-UHFFFAOYSA-N trimethylamine Chemical compound CN(C)C GETQZCLCWQTVFV-UHFFFAOYSA-N 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 239000004711 α-olefin Substances 0.000 description 2
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 2
- SZCWBURCISJFEZ-UHFFFAOYSA-N (3-hydroxy-2,2-dimethylpropyl) 3-hydroxy-2,2-dimethylpropanoate Chemical compound OCC(C)(C)COC(=O)C(C)(C)CO SZCWBURCISJFEZ-UHFFFAOYSA-N 0.000 description 1
- MUTGBJKUEZFXGO-OLQVQODUSA-N (3as,7ar)-3a,4,5,6,7,7a-hexahydro-2-benzofuran-1,3-dione Chemical compound C1CCC[C@@H]2C(=O)OC(=O)[C@@H]21 MUTGBJKUEZFXGO-OLQVQODUSA-N 0.000 description 1
- 125000003837 (C1-C20) alkyl group Chemical group 0.000 description 1
- ZQHJVIHCDHJVII-OWOJBTEDSA-N (e)-2-chlorobut-2-enedioic acid Chemical compound OC(=O)\C=C(\Cl)C(O)=O ZQHJVIHCDHJVII-OWOJBTEDSA-N 0.000 description 1
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- QXRRAZIZHCWBQY-UHFFFAOYSA-N 1,1-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1(CN=C=O)CCCCC1 QXRRAZIZHCWBQY-UHFFFAOYSA-N 0.000 description 1
- ZWVMLYRJXORSEP-UHFFFAOYSA-N 1,2,6-Hexanetriol Chemical compound OCCCCC(O)CO ZWVMLYRJXORSEP-UHFFFAOYSA-N 0.000 description 1
- MTZUIIAIAKMWLI-UHFFFAOYSA-N 1,2-diisocyanatobenzene Chemical compound O=C=NC1=CC=CC=C1N=C=O MTZUIIAIAKMWLI-UHFFFAOYSA-N 0.000 description 1
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- 150000001993 dienes Chemical class 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 description 1
- 229940105990 diglycerin Drugs 0.000 description 1
- GPLRAVKSCUXZTP-UHFFFAOYSA-N diglycerol Chemical compound OCC(O)COCC(O)CO GPLRAVKSCUXZTP-UHFFFAOYSA-N 0.000 description 1
- LVTYICIALWPMFW-UHFFFAOYSA-N diisopropanolamine Chemical compound CC(O)CNCC(C)O LVTYICIALWPMFW-UHFFFAOYSA-N 0.000 description 1
- BEPAFCGSDWSTEL-UHFFFAOYSA-N dimethyl malonate Chemical compound COC(=O)CC(=O)OC BEPAFCGSDWSTEL-UHFFFAOYSA-N 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Natural products C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- LQZZUXJYWNFBMV-UHFFFAOYSA-N dodecan-1-ol Chemical compound CCCCCCCCCCCCO LQZZUXJYWNFBMV-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl 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])C([H])([H])C([H])([H])* 0.000 description 1
- ODQWQRRAPPTVAG-GZTJUZNOSA-N doxepin Chemical compound C1OC2=CC=CC=C2C(=C/CCN(C)C)/C2=CC=CC=C21 ODQWQRRAPPTVAG-GZTJUZNOSA-N 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000007720 emulsion polymerization reaction Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 238000006266 etherification reaction Methods 0.000 description 1
- ZANNOFHADGWOLI-UHFFFAOYSA-N ethyl 2-hydroxyacetate Chemical compound CCOC(=O)CO ZANNOFHADGWOLI-UHFFFAOYSA-N 0.000 description 1
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 1
- 125000004494 ethyl ester group Chemical group 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229940116333 ethyl lactate Drugs 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- VLKZOEOYAKHREP-UHFFFAOYSA-N hexane Substances CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 1
- TZMQHOJDDMFGQX-UHFFFAOYSA-N hexane-1,1,1-triol Chemical compound CCCCCC(O)(O)O TZMQHOJDDMFGQX-UHFFFAOYSA-N 0.000 description 1
- ACCCMOQWYVYDOT-UHFFFAOYSA-N hexane-1,1-diol Chemical compound CCCCCC(O)O ACCCMOQWYVYDOT-UHFFFAOYSA-N 0.000 description 1
- QVTWBMUAJHVAIJ-UHFFFAOYSA-N hexane-1,4-diol Chemical compound CCC(O)CCCO QVTWBMUAJHVAIJ-UHFFFAOYSA-N 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 1
- OHMBHFSEKCCCBW-UHFFFAOYSA-N hexane-2,5-diol Chemical compound CC(O)CCC(C)O OHMBHFSEKCCCBW-UHFFFAOYSA-N 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- 150000002460 imidazoles Chemical class 0.000 description 1
- YAMHXTCMCPHKLN-UHFFFAOYSA-N imidazolidin-2-one Chemical compound O=C1NCCN1 YAMHXTCMCPHKLN-UHFFFAOYSA-N 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 150000002466 imines Chemical class 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
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- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000594 mannitol Substances 0.000 description 1
- 235000010355 mannitol Nutrition 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- VHWYCFISAQVCCP-UHFFFAOYSA-N methoxymethanol Chemical compound COCO VHWYCFISAQVCCP-UHFFFAOYSA-N 0.000 description 1
- AYLRODJJLADBOB-QMMMGPOBSA-N methyl (2s)-2,6-diisocyanatohexanoate Chemical compound COC(=O)[C@@H](N=C=O)CCCCN=C=O AYLRODJJLADBOB-QMMMGPOBSA-N 0.000 description 1
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 1
- 150000004702 methyl esters Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 229940057867 methyl lactate Drugs 0.000 description 1
- SOOARYARZPXNAL-UHFFFAOYSA-N methyl-thiophenol Natural products CSC1=CC=CC=C1O SOOARYARZPXNAL-UHFFFAOYSA-N 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
- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 1
- SCZVXVGZMZRGRU-UHFFFAOYSA-N n'-ethylethane-1,2-diamine Chemical compound CCNCCN SCZVXVGZMZRGRU-UHFFFAOYSA-N 0.000 description 1
- IONSZLINWCGRRI-UHFFFAOYSA-N n'-hydroxymethanimidamide Chemical compound NC=NO IONSZLINWCGRRI-UHFFFAOYSA-N 0.000 description 1
- QHJABUZHRJTCAR-UHFFFAOYSA-N n'-methylpropane-1,3-diamine Chemical compound CNCCCN QHJABUZHRJTCAR-UHFFFAOYSA-N 0.000 description 1
- DNYZBFWKVMKMRM-UHFFFAOYSA-N n-benzhydrylidenehydroxylamine Chemical compound C=1C=CC=CC=1C(=NO)C1=CC=CC=C1 DNYZBFWKVMKMRM-UHFFFAOYSA-N 0.000 description 1
- VSHTWPWTCXQLQN-UHFFFAOYSA-N n-butylaniline Chemical compound CCCCNC1=CC=CC=C1 VSHTWPWTCXQLQN-UHFFFAOYSA-N 0.000 description 1
- KYTZHLUVELPASH-UHFFFAOYSA-N naphthalene-1,2-dicarboxylic acid Chemical compound C1=CC=CC2=C(C(O)=O)C(C(=O)O)=CC=C21 KYTZHLUVELPASH-UHFFFAOYSA-N 0.000 description 1
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 1
- OTLDLKLSNZMTTA-UHFFFAOYSA-N octahydro-1h-4,7-methanoindene-1,5-diyldimethanol Chemical compound C1C2C3C(CO)CCC3C1C(CO)C2 OTLDLKLSNZMTTA-UHFFFAOYSA-N 0.000 description 1
- 150000002923 oximes Chemical class 0.000 description 1
- QNGNSVIICDLXHT-UHFFFAOYSA-N para-ethylbenzaldehyde Natural products CCC1=CC=C(C=O)C=C1 QNGNSVIICDLXHT-UHFFFAOYSA-N 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- WCVRQHFDJLLWFE-UHFFFAOYSA-N pentane-1,2-diol Chemical compound CCCC(O)CO WCVRQHFDJLLWFE-UHFFFAOYSA-N 0.000 description 1
- GLOBUAZSRIOKLN-UHFFFAOYSA-N pentane-1,4-diol Chemical compound CC(O)CCCO GLOBUAZSRIOKLN-UHFFFAOYSA-N 0.000 description 1
- GTCCGKPBSJZVRZ-UHFFFAOYSA-N pentane-2,4-diol Chemical compound CC(O)CC(C)O GTCCGKPBSJZVRZ-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- XVNKRRXASPPECQ-UHFFFAOYSA-N phenyl n-phenylcarbamate Chemical compound C=1C=CC=CC=1OC(=O)NC1=CC=CC=C1 XVNKRRXASPPECQ-UHFFFAOYSA-N 0.000 description 1
- XKJCHHZQLQNZHY-UHFFFAOYSA-N phthalimide Chemical compound C1=CC=C2C(=O)NC(=O)C2=C1 XKJCHHZQLQNZHY-UHFFFAOYSA-N 0.000 description 1
- 229920001515 polyalkylene glycol Polymers 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
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- 229920002635 polyurethane Polymers 0.000 description 1
- DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 description 1
- 229940099427 potassium bisulfite Drugs 0.000 description 1
- 235000010259 potassium hydrogen sulphite Nutrition 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- 150000003217 pyrazoles Chemical class 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
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- 229910052710 silicon Inorganic materials 0.000 description 1
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- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
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- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
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Landscapes
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- Polyurethanes Or Polyureas (AREA)
- Paints Or Removers (AREA)
Description
【0001】
【発明の属する技術分野】
本発明は、耐チッピング性がすぐれた塗膜を形成する水性塗料組成物に関する。
【0002】
【従来の技術とその課題】
自動車車体の外板部は、防食及び美感の付与を目的として、通常、下塗り塗膜、中塗り塗膜及び上塗り塗膜からなる複層塗膜により被覆されている。そして、自動車の走行中に路面上の小石、砂利、凍結防止剤、氷塊などを巻き上げ、これらが車体外板部に衝突して複層塗膜をキズをつけ、はなはだしくはその複層塗膜が局所的に破損・脱落せしめ、外観をそこなったり、金属素地面を露出させ、発錆、腐食する(この現象を「チッピング」という)という欠陥が生じる。
【0003】
従来、これらの複層塗膜を形成するための中塗り塗料として水酸基含有ポリエステル樹脂とメラミン樹脂を含有する塗料が使用されているが、チッピングを防止することは困難であった。
【0004】
【課題を解決するための手段】
本発明の目的は上記した欠陥を解消することであり、鋭意研究の結果、1分子中に水酸基及びブロックイソシアネート基が併存するウレタン変性ポリエステル樹脂、架橋剤及びコア部とシェル部のガラス転移温度が異なるビニル樹脂粒子を含有する水性塗料組成物が、耐チッピング性にすぐれた塗膜を形成することを見出し、本発明を完成するに至った。
【0005】
すなわち、本発明は、(A)1分子中に水酸基及びブロックイソシアネート基が併存するウレタン変性ポリエステル樹脂、(B)架橋剤としてメラミン樹脂及び(C)コア部のガラス転移温度が−80〜0℃で、シェル部のガラス転移温度が40〜120℃であるビニル樹脂粒子を含有し、(C)成分の含有量が(A)成分と(B)成分との合計100重量部あたり5〜30重量部であることを特徴とする水性塗料組成物(以下、「本組成物」という)を提供するものである。
【0006】
【発明の実施の形態】
以下に、本組成物について具体的に説明する。
【0007】
(A)成分:1分子中に水酸基及びブロックイソシアネート基が併存するウレタン変性ポリエステル樹脂
(A)成分は、例えば、水酸基含有ポリエステル樹脂中の水酸基の一部に、部分ブロックポリイソシアネート化合物をウレタン化反応せしめることによって得ることができる。
【0008】
水酸基含有ポリエステル樹脂は1分子中に2個以上の水酸基を有しており、多塩基酸と多価アルコールとのエステル化反応により調製することができる。
【0009】
多塩基酸は1分子中に2個以上のカルボキシル基を有する化合物であり、例えば、テレフタル酸、イソフタル酸、フタル酸、ナフタレンジカルボン酸、4,4′−ビフェニルジカルボン酸、ジフェニルメタン−4,4′−ジカルボン酸などの芳香族ジカルボン酸及びその無水物;ヘキサヒドロイソフタル酸、ヘキサヒドロテレフタル酸、ヘキサヒドロフタル酸、テトラヒドロフタル酸などの脂環族ジカルボン酸及びその無水物;アジピン酸、セバシン酸、スベリン酸、コハク酸、グルタル酸、マレイン酸、クロロマレイン酸、フマル酸、ドデカン二酸、ピメリン酸、アゼライン酸、イタコン酸、シトラコン酸、ダイマー酸などの脂肪族ジカルボン酸及びその無水物;これらのジカルボン酸のメチルエステル、エチルエステルなどの低級アルキルエステル;トリメリット酸、無水トリメリット酸、ピロメリット酸、無水ピロメット酸、トリメシン酸、メチルシクロヘキセントリカルボン酸、テトラクロロヘキセントリカルボン酸及びその無水物などの3価以上の多塩基酸などがあげられる。
【0010】
多価アルコールは1分子中に2個以上の水酸基を有する化合物であり、例えば、エチレングリコール、プロピレングリコール、ジエチレングリコール、トリメチレングリコール、テトラエチレングリコール、トリエチレングリコール、ジプロピレングリコール、1,4−ブタンジオール、1,3−ブタンジオール、2,3−ブタンジオール、1,2−ブタンジオール、3−メチル−1,2−ブタンジオール、1,2−ペンタンジオール、1,5−ペンタンジオール、1,4−ペンタンジオール、2,4−ペンタンジオール、2,3−ジメチルトリメチレングリコール、テトラメチレングリコール、3−メチル−4,3−ペンタンジオール、3−メチル−4,5−ペンタンジオール、2,2,4−トリメチル−1,3−ペンタンジオール、1,6−ヘキサンジオール、1,5−ヘキサンジオール、1,4−ヘキサンジオール、2,5−ヘキサンジオール、ネオペンチルグリコール、ヒドロキシピヴァリン酸ネオペンチルグリコールエステルなどの2価アルコール;これらの2価アルコールにε−カプロラクトンなどのラクトン類を付加したポリラクトンジオール;ビス(ヒドロキシエチル)テレフタレートなどのエステルジオール類;ビスフェノールAのアルキレンオキサイド付加物、ポリエチレングリコール、ポリプロピレングリコール、ポリブチレングリコールなどのポリエーテルジオール類;プロピレンオキサイド及びブチレンオキサイドなどのα−オレフィンエポキシド、カージュラE10[シェル化学社製、商品名、合成高分岐飽和脂肪酸のグリシジルエステル]などのモノエポキシ化合物;グリセリン、トリメチロールプロパン、トリメチロールエタン、ジグリセリン、トリグリセリン、1,2,6−ヘキサントリオール、ペンタエリスリトール、ジペンタエリスリトール、ソルビトール、マンニットなどの3価以上のアルコール;これらの3価以上のアルコールにε−カプロラクトンなどのラクトン類を付加させたポリラクトンポリオール類;1,4−シクロヘキサンジメタノール、トリシクロデカンジメタノール、水添ビスフェノールA、水添ビスフェノールF、水添ビスフェノールA及び水添ビスフェノールFなど脂環族多価アルコールなどがあげられる。
【0011】
水酸基含有ポリエステル樹脂を調製するための上記多塩基酸と多価アルコールとのエステル化反応は水酸基過剰でそれ自体既知の方法により行なうことができる。
【0012】
部分ブロックポリイソシアネート化合物は、1分子中にブロックされていない遊離のイソシアネート基及びブロック剤で封鎖されたブロックイソシアネート基が併存する化合物であり、例えば、ポリイソシアネート化合物中の遊離イソシアネート基の一部をブロック剤で封鎖することにより得られる。
【0013】
ポリイソシアネート化合物は、1分子中に、封鎖されていない遊離のイソシアネート基を2個以上有する化合物である。具体的には、ヘキサメチレンジイソシアネート、トリメチレンジイソシアネート、1,4−テトラメチレンジイソシアネート、ペンタメチレンジイソシアネート、1,2−プロピレンジイソシアネート、1,2−ブチレンジイソシアネート、2,3−ブチレンジイソシアネート、1,3−ブチレンジイソシアネート、トリメチルヘキサメチレンジイソシアネート、ダイマー酸ジイソシアネート、リジンジイソシアネートなどの脂肪族系ジイソシアネート化合物;イソホロンジイソシアネート、4,4′−メチレンビス(シクロヘキシルイソシアネート)、メチルシクロヘキサン−2,4−(又は−2,6−)ジイソシアネート、1,3−(又は1,4−)ジ(イソシアナトメチル)シクロヘキサン、1,4−シクロヘキサンジイソシアネート、1,3−シクロペンタンジイソシアネート、1,2−シクロヘキサンジイソシアネートなどの脂環式系ジイソシアネート化合物;キシリレンジイソシアネート、メタキシリレンジイソシアネート、テトラメチルキシリレンジイソシアネート、トリレンジイソシアネート、4,4′−ジフェニルメタンジイソシアネート、1,5−ナフタレンジイソシアネート、1,4−ナフタレンジイソシアネート、4,4′−トルイジンジイソシアネ−ト、4,4′−ジフェニルエーテルジイソシアネート、(m−又はp−)フェニレンジイソシアネート、4,4′−ビフェニレンジイソシアネート、3,3′−ジメチル−4,4′−ビフェニレンジイソシアネート、ビス(4−イソシアナトフェニル)スルホン、イソプロピリデンビス(4−フェニルイソシアネート)などの芳香族ジイソシアネート化合物;トリフェニルメタン−4,4′,4″−トリイソシアネート、1,3,5−トリイソシアナトベンゼン、2,4,6−トリイソシアナトトルエン、4,4′−ジメチルジフェニルメタン−2,2′,5,5′−テトライソシアネートなどの1分子中に3個以上のイソシアネ−ト基を有するポリイソシアネート化合物;エチレングリコール、プロピレングリコール、1,4−ブチレングリコール、ジメチロールプロピオン酸、ポリアルキレングリコール、トリメチロ−ルプロパン、ヘキサントリオ−ルなどのポリオールの水酸基にイソシアネート基が過剰量となる比率でポリイソシアネート化合物を反応させてなるウレタン化付加物;ヘキサメチレンジイソシアネート、イソホロンジイソシアネート、トリレンジイソシアネート、キシリレンジイソシアネート、4,4′−ジフェニルメタンジイソシアネート、4,4′−メチレンビス(シクロヘキシルイソシアネート)などのビューレットタイプ付加物、イソシアヌル環タイプ付加物などがあげられる。
【0014】
ブロック剤は遊離のイソシアネート基を封鎖するものであり、例えば100℃以上、好ましくは130℃以上に加熱すると、水酸基などと容易に反応することができる。
【0015】
かかるブロック剤として、例えば、フェノール、クレゾール、キシレノール、ニトロフェノール、エチルフェノール、ヒドロキシジフェニル、ブチルフェノール、イソプロピルフェノール、ノニルフェノール、オクチルフェノール、ヒドロキシ安息香酸メチルなどのフェノール系;ε−カプロラクタム、δ−バレロラクタム、γ−ブチロラクタム、β−プロピオラクタムなどのラクタム系;メタノール、エタノール、プロピルアルコール、ブチルアルコール、アミルアルコール、ラウリルアルコールなどの脂肪族系;エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールモノブチルエーテル、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、プロピレングリコールモノメチルエーテル、メトキシメタノールなどのエーテル系;ベンジルアルコール;グリコール酸;グリコール酸メチル、グリコール酸エチル、グリコール酸ブチルなどのグリコール酸エステル;乳酸、乳酸メチル、乳酸エチル、乳酸ブチルなどの乳酸エステル;メチロール尿素、メチロールメラミン、ジアセトンアルコール、2−ヒドロキシエチルアクリレ−ト、2−ヒドロキシエチルメタクリレ−トなどのアルコール系;ホルムアミドキシム、アセトアルドキシム、アセトキシム、メチルエチルケトキシム、ジアセチルモノオキシム、ベンゾフェノンオキシム、シクロヘキサンオキシムなどのオキシム系;マロン酸ジメチル、マロン酸ジエチル、アセト酢酸エチル、アセト酢酸メチル、アセチルアセトンなどの活性メチレン系;ブチルメルカプタン、t−ブチルメルカプタン、ヘキシルメルカプタン、t−ドデシルメルカプタン、2−メルカプトベンゾチアゾール、チオフェノール、メチルチオフェノール、エチルチオフェノールなどのメルカプタン系;アセトアニリド、アセトアニシジド、アセトトルイド、アクリルアミド、メタクリルアミド、酢酸アミド、ステアリン酸アミド、ベンズアミドなどの酸アミド系;コハク酸イミド、フタル酸イミド、マレイン酸イミドなどのイミド系;ジフェニルアミン、フェニルナフチルアミン、キシリジン、N−フェニルキシリジン、カルバゾール、アニリン、ナフチルアミン、ブチルアミン、ジブチルアミン、ブチルフェニルアミンなどアミン系;イミダゾール、2−エチルイミダゾールなどのイミダゾール系;ピラゾール;尿素、チオ尿素、エチレン尿素、エチレンチオ尿素、ジフェニル尿素などの尿素系;N−フェニルカルバミン酸フェニルなどのカルバミン酸エステル系;エチレンイミン、プロピレンイミンなどのイミン系;重亜硫酸ソーダ、重亜硫酸カリなどの亜硫酸塩系などがあげられる。
【0016】
(A)成分を調製するにあたり、ポリイソシアネート化合物中のイソシアネート基の一部をブロック剤で封鎖して、1分子中に遊離のイソシアネート基及び封鎖されたブロックイソシアネート基を併存する部分ブロックポリイソシアネート化合物をあらかじめ準備しておくことが好ましい。ポリイソシアネート化合物とブロック剤との反応は既知の条件で行なうことができる。また、両成分の比率は、得られる部分ブロックポリイソシアネート化合物が、1分子中に、遊離のイソシアネート基及び封鎖されたブロックイソシアネート基をそれぞれ少なくとも1個づつ有している範囲内であれば、特に制限はない。
【0017】
かかる部分ブロックポリイソシアネート化合物を、水酸基含有ポリエステル樹脂中の一部の水酸基に反応せしめることにより(A)成分が得られる。部分ブロックポリイソシアネート化合物と水酸基含有ポリエステル樹脂とのウレタン化反応は既知の方法で行なうことができる。
【0018】
また、水酸基含有ポリエステル樹脂中の水酸基の一部に未ブロックのポリイソシアネート化合物の一部のイソシアネート基を反応せしめてなる生成物の残りのイソシアネート基をブロック剤で封鎖することによっても(A)成分が得られる。
【0019】
また、上記の多価アルコール(ジメチロールプロピオン酸などのカルボキシル基含有多価アルコールも含まれる)、部分ブロックポリイソシアネート化合物及び未ブロックポリイソシアネート化合物をイソシアネート基過剰の比率で反応せしめてなる生成物を、水酸基含有ポリエステル樹脂中の一部の水酸基に反応せしめることにより(A)成分が得られる。
【0020】
かくして得られる(A)成分は、水酸基価が20〜200mgKOH/g、特に40〜120mgKOH/g、イソシアネート基価が5〜120mgKOH/g、特に10〜50、酸価が100mgKOH/g以下、特に10〜60mgKOH/g、数平均分子量が1000〜20000、特に1500〜10000の範囲内が好ましい。
【0021】
(B)成分:架橋剤
上記の(A)成分の水酸基と反応しうる成分を(B)成分として好適に使用することができ、具体的には、メラミン樹脂及びブロックポリイソシアネート化合物などがあげられる。
【0022】
メラミン樹脂としては、メラミンとアルデヒドとの反応によって得られるメチロール化アミノ樹脂があげられる。アルデヒドとしては、ホルムアルデヒド、パラホルムアルデヒド、アセトアルデヒド、ベンツアルデヒド等がある。また、このメチロール化アミノ樹脂のメチロール基の一部又は全部をモノアルコールによってエーテル化したものも使用できる。エーテル化に用いられるモノアルコールとしてはメチルアルコール、エチルアルコール、n−プロピルアルコール、i−プロピルアルコール、n−ブチルアルコール、i−ブチルアルコール、2−エチルブタノール、2−エチルヘキサノールなどがあげられる。
【0023】
本組成物では、(B)成分として、トリアジン核1個あたりメチロール基が平均3個以上メチルエーテル化されたメラミンや、そのメトキシ基の一部を炭素数2個以上のモノアルコールで置換したメラミン樹脂であって、さらにイミノ基を有し、かつ平均縮合度約2以下で1核体の割合が約50重量%以上である親水性メラミンが好適に使用できる。
【0024】
ブロックポリイソシアネート化合物は、1分子中に遊離のイソシアネート基を2個以上有するポリイソシアネート化合物のすべてのイソシアネート基をブロック剤で封鎖した化合物が使用できる。ポリイソシアネート化合物及びブロック剤としては、上記の(A)成分で例示したものが好適に使用でき、該両成分による反応は既知の方法で行なうことができる。
【0025】
(C)成分:コア部とシェル部のガラス転移温度が異なるビニル樹脂粒子
コア部(芯部)の周囲にシェル部(皮部)が形成されてなるいわゆるコアシェル型の複層構造を有する粒子であり、この両部はいずれもビニル単量体の重合によるビニル樹脂で構成されていることが好ましい。
【0026】
本組成物では、(C)成分におけるコア部とシェル部のビニル樹脂のガラス転移温度(Tg)が異なっていることが必要である。具体的には、コア部のTgが−80〜0℃、特に−20〜−60℃、シェル部のTgが40〜120℃、特に80〜110℃の範囲内にそれぞれ含まれていることが適している。これらのTgの調整はビニル単量体の組成及び比率などによって容易に行なうことができる。
【0027】
コア部及びシェル部のビニル樹脂を形成するのに使用されるビニル単量体は、1分子中に1個以上の重合性不飽和結合を有する化合物であり、特に制限はなく、以下に例示する単量体があげられる。
【0028】
1)メチル(メタ)アクリレート、エチル(メタ)アクリレート、プロピル(メタ)アクリレート、ブチル(メタ)アクリレート、2−エチルヘキシル(メタ)アクリレート、ラウリル(メタ)アクリレートなどの炭素数1〜20のアルキル(メタ)アクリレート、
2)酢酸ビニル、プロピオン酸ビニルなどのビニルエステル、
3)塩化ビニル、フッ化ビニル、塩化ビニリデン、フッ化ビニリデンなどのビニルハライド又はビニリデンハライド、
4)(メタ)アクリロニトリル、(メタ)アクリルアミド、メチロール(メタ)アクリルアミドなどの含窒素ビニル単量体、
5)スチレン、α−メチルスチレン、ビニルトルエンなどの芳香族ビニル単量体、
6)ヒドロキシエチル(メタ)アクリレート、ヒドロキシエチル(メタ)アクリレート、ヒドロキシプロピル(メタ)アクリレート、ヒドロキシブチル(メタ)アクリレートなどの(メタ)アクリル酸のC2〜C8のヒドロキシアルキルエステル;ポリエチレングリコール、ポリプロレングリコール、ポリブチレングリコールなどのポリエーテルポリオールと(メタ)アクリル酸などの不飽和カルボン酸とのモノエステル;ポリエチレングリコール、ポリプロレングリコール、ポリブチレングリコールなどのポリエーテルポリオールとヒドロキシエチル(メタ)アクリレートなどの水酸基含有不飽和単量体とのモノエーテル;α,β−不飽和カルボン酸と、カージュラE10(シェル化学社製、商品名)やα―オレフィンエポキシドのようなモノエポキシ化合物との付加物;グリシジル(メタ)アクリレートと酢酸、プロピオン酸、p−t−ブチル安息香酸、脂肪酸類などの一塩基酸類との付加物;無水マレイン酸や無水イタコン酸のごとき酸無水基含有不飽和単量体と、エチレングリコール、1,6−ヘキサングリコール、ネオペンチルグリコールなどのグリコール類とのモノエステル化物又はジエステル化物;ヒドロキシエチルビニルエーテルのごときヒドロキシアルキルビニルエーテル類;3−クロロー2−ヒドロキシプロピル(メタ)アクリレートのような塩素を含んだ水酸基含有ビニル単量体;アリルアルコールなどの水酸基含有ビニル単量体、
7)(メタ)アクリル酸、マレイン酸等のカルボキシル基含有ビニル単量体、
8)ブタジエン、イソプレンなどのジエン系単量体。
【0029】
(C)成分は、上記のビニル単量体を用い、既知の乳化重合又は懸濁重合などにより調製することができ、その形状は微粒子状であり、粒径は50〜1000nm、特に80〜700nmの範囲内が適している。
【0030】
本組成物における上記の(A)成分、(B)成分及び(C)成分の構成比率は特に制限されず、目的に応じて任意に選択できるが、例えば、(A)成分と(B)成分との合計重量を基準に(A)成分は50〜90重量%、特に65〜85重量%、(B)成分は50〜10重量%、特に35〜15重量%の範囲内が好ましい。(C)成分は、(A)成分と(B)成分との合計100重量部あたり、5〜30重量部、特に8〜15重量部が適している。
【0031】
本組成物は上記の(A)成分、(B)成分及び(C)成分を水に混合・分散せしめることにより調製することができる。このうち(A)成分は、その分子中にカルボキシル基を有していれば、それを中和剤で中和することにより、水分散性が改良されるのでより好ましい。中和剤として、例えば、水酸化ナトリウム、水酸化カリウム、水酸化リチウム、水酸化カルシウム、水酸化バリウムなどのアルカリ金属又はアルカリ土類金属の水酸化物;アンモニア;エチルアミン、プロピルアミン、ブチルアミン、ベンジルアミン、モノエタノールアミン、ネオペンタノールアミン、2−アミノプロパノール、3−アミノプロパノールなどの第1級モノアミン;ジエチルアミン、ジエタノールアミン、ジ−n−またはジ−iso −プロパノールアミン、N−メチルエタノールアミン、N−エチルエタノールアミンなどの第2級モノアミン;ジメチルエタノールアミン、トリメチルアミン、トリエチルアミン、トリイソプロピルアミン、メチルジエタノールアミン、ジメチルアミノエタノールなどの第3級モノアミン;ジエチレントリアミン、ヒドロキシエチルアミノエチルアミン、エチルアミノエチルアミン、メチルアミノプロピルアミンなどのポリアミンを挙げることができる。
【0032】
本組成物は上記の(A)成分、(B)成分及び(C)成分に加え、さらに必要に応じて、水酸基含有ポリエステル樹脂、水酸基含有ウレタン樹脂、ソリッドカラー顔料、メタリック顔料、光干渉性顔料、体質顔料、分散剤、沈降防止剤、有機溶剤、ウレタン化反応促進用触媒(例えば有機スズ化合物など)、水酸基とメラミン樹脂との架橋反応促進用触媒(例えば、酸触媒)、消泡剤、増粘剤、防錆剤、表面調整剤などを適宜に配合することができる。
【0033】
このうち、水酸基含有ポリエステル樹脂は、上記の(A)成分で例示した多塩基酸と多価アルコールを使用し、既知の方法でエステル化反応せしめることによって調製することができ、水酸基価が50〜200mgKOH/g、特に70〜150mgKOH/g、酸価が5〜100mgKOH/g、特に10〜60mgKOH/g、数平均分子量が1000〜20000、特に1500〜10000の範囲内が好ましく、このものは分子中に(ブロック)イソシアネート基を有していない。
【0034】
又、水酸基含有ウレタン樹脂は、(A)成分の説明で例示したポイソシアネート化合物、多価アルコール及び水酸基含有ポリエステル樹脂を使用して、既知の方法によりウレタン化反応せしめることにより調製することができ、水酸基価が50〜200mgKOH/g、特に70〜150mgKOH/g、酸価が5〜100mgKOH/g、特に10〜60mgKOH/g、数平均分子量が1000〜20000、特に1500〜10000の範囲内が好ましく、このものは分子中に(ブロック)イソシアネート基を有していない。
【0035】
これらの水酸基含有ポリエステル樹脂及び水酸基含有ウレタン樹脂は、必要に応じてその分子中に含まれることがあるカルボキシル基を上記と同様にして中和してから、上記(A)成分の一部をこれらに置換して配合することができ、その比率は、(A)成分の上記配合比率の内、75重量%以下をこれらの樹脂に置換して配合することができる。
【0036】
本組成物は、既知の方法、例えば、刷け塗り、エアースプレー、エアレススプレー、静電塗装などにより塗装することができ、その膜厚は硬化塗膜で10〜100μm、特に20〜60μmの範囲内が好ましく、その塗膜は120〜170℃、特に130〜160℃で、10〜40分間加熱することにより架橋硬化させることができる。
【0037】
本組成物によって形成される塗膜は耐チッピング性がすぐれているので、自動車車体の外板部などに形成する下塗り塗膜、中塗り塗膜及び上塗り塗膜からなる複層塗膜における中塗り塗膜の形成に使用することが好ましい。
【0038】
具体的には、自動車車体にカチオン電着塗料などの下塗り塗料を塗装し、その塗膜を加熱硬化してから、又は硬化せずに、その塗面に本組成物を塗装し、その塗膜を加熱硬化してから、又は硬化せずに、その塗面に上塗り塗料を塗装し、加熱してこれらの塗膜を硬化させることによって行われる。
【0039】
上塗り塗料として、ソリッドカラー塗料、メタリック塗料、光干渉性塗料及びクリヤ塗料などが使用でき、これらから選ばれた1種又は2種以上用いて、単層、2層以上の複層上塗り塗膜を形成することができる。これらのカチオン電着塗料及び上塗り塗料(有機溶剤系、水系のいずれでも適用可能である)としてそれ自体既知の塗料が使用できる。
【0040】
本組成物を、自動車車体の外板部などに形成する下塗り塗膜、中塗り塗膜及び上塗り塗膜からなる複層塗膜における中塗り塗膜の形成に使用することにより、複層塗膜の耐チッピング性を顕著に向上することができた。
【0041】
【実施例】
以下に、本発明に関する実施例及び比較例について説明する。部及び%はいずれも重量に基いており、又塗膜の膜厚は硬化塗膜についてである。
【0042】
1.試料の調製
1)(A)成分
(A−1):トリメチロールプロパン0.2モル、1,6−ヘキサンジオール0.8モル、シクロヘキシルジカルボン酸0、4モル及びアジピン酸0.3モルを反応させた後、さらに無水トリメリット酸0.05モルを付加してなるポリエステル樹脂(100部)に、4,4‘−メチレンビス(シクロヘキシルイソシアネート)2モルとジメチロールプロピオン酸1モルを反応させてなるポリウレタン(30部)とをメチルエチルケトン中で反応させてなる生成物(130部)に含まれる水酸基の一部に、メチルエチルケトンオキシムと4,4‘−メチレンビス(シクロヘキシルイソシアネート)とを等モル比で反応させてなる半ブロックポリイソシアネート化合物(10部)を反応せしめ、ついで脱溶剤し、ジメチルエタノールアミンを加えて中和し、水に混合して水分散液とした。かくして得られた(A−1)成分の水酸基価は90mgKOH/g、酸価は38mgKOH/g、NCO価は10、数平均分子量は2000であった。
【0043】
(A−2):上記の(A−1)成分の「4,4‘−メチレンビス(シクロヘキシルイソシアネート)」を「テトラメチルキシリレンジイソシアネート」に変更した以外は、(A−1)成分に準じて行なって(A−2)成分を得た。得られた(A−2)成分の水酸基価は90mgKOH/g、酸価は38mgKOH/g、NCO価は10、数平均分子量は2000であった。
【0044】
2)(B)成分
(B−1):「サイメル325」(三井サイテック社製、商品名、イミノ基含有メラミン樹脂)。
3)(C)成分
(C−1):「スタフィロイドAC4030」(武田薬品工業社製、商品名、コア・シェル型ビニル樹脂粒子)。コア部のガラス転移温度―40℃、シェル部のガラス転移温度110℃、粒径500nm。
【0045】
(C−2):「スタフィロイドAC3364」(武田薬品工業社製、商品名、コア・シェル型ビニル樹脂粒子)。コア部のガラス転移温度―40℃、シェル部のガラス転移温度110℃、粒径100nm。
【0046】
4)他の成分
ポリエステル樹脂:ネオペンチルグリコール0.27モル、トリメチロールプロパン0.33モル、ブチルエチルプロパンジオール0.4モル、イソフタル酸0.25モル、アジピン酸0.3モル及びヘキサヒドロ無水フタル酸0.3モルを反応せしめてなる生成物に無水トリメリット酸0.05モルを付加せしめた後、脱溶剤を行ない、ジメチルエタノールアミンで中和してから、水に混合して水分散液とした。得られたポリエステル樹脂の水酸基価は130mgKOH/g、酸価は25mgKOH/g、数平均分子量は1800であった。
【0047】
5)顔料
チタン白:「JR806」(テイカ社製、商品名)
カーボンブラック:「カーボンブラックMA100」(三菱化学社製、商品名)
2.実施例及び比較例
上記の試料を用い、表1に記載した比率(固形分比)で配合し、固形分含有率50%の本発明の水性塗料組成物を得た。
【0048】
表面をりん酸亜鉛で化成処理した鋼板にカチオン電着塗料(「エレクロンGT10」、関西ペイント社製、商品名、エポキシ樹脂系)を膜厚20μmになるように塗装し、170℃で30分加熱して塗膜を硬化してから、その塗面に表1に記載の水性塗料組成物を膜厚30μmに塗装し、150℃30分加熱して硬化し、ついでその塗面にメタリック塗料(「マジクロンTB515」関西ペイント社製、商品名、ポリエステル・メラミン樹脂系)を膜厚15μmに塗装し、室温で3分間放置してから、その未硬化塗面にクリヤ塗料(「マジクロンTC71」関西ペイント社製、商品名、アクリル・メラミン樹脂系)を膜厚35μmに塗装し、140℃で30分加熱してこの両塗膜を一緒に硬化せしめた。
【0049】
かくして形成された複層塗膜の性能試験を行ない、その結果を表1に併記した。試験方法は次のとおりである。
【0050】
耐チッピング性:米国Q−PANEL社製、Q−G−Rグラベロメータ(チッピング試験装置)の試片保持台に試験板を設置し、−20℃において、3kg/cm2の圧縮空気により粒度7号の花崗岩砕石50gを塗面に吹き付け、これによる塗膜のキズの発生程度などを目視で観察し評価した。○はキズの大きさは小さく、中塗り塗膜(本組成物の塗膜)が露出している程度、△はキズの大きさは小さいが、素地の鋼板が露出している、×は△はキズの大きさはかなり大きく、素地の鋼板も大きく露出しているを示す。
【0051】
平滑性:複層塗膜の表面を目視観察した結果である。○は平滑性良好、△は平滑性やや劣る、
×は平滑性非常に劣るを示す。
【0052】
付着性:カッター素地に達するように切り込み、大きさ2mm×2mmのゴバン目を100個作り、その塗面に粘着セロハンテープを貼着し、20℃においてテープを急激に剥離したあとの残存ゴバン目塗膜数を調べた。○は100個残存している、△は99〜95個残存している×は94個以下残存しているを示す。
【0053】
耐水性:試験板を40℃の温水に10日間浸漬した後の塗面を目視観察した結果である。○はブリスターなどの発生が全く認められない、△はブリスターなどの発生が少し認められる、×はブリスターなどの発生が多く認められるを示す。
【0054】
【表1】
表1
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an aqueous coating composition that forms a coating film with excellent chipping resistance.
[0002]
[Prior art and its problems]
The outer plate portion of an automobile body is usually coated with a multilayer coating film composed of an undercoating film, an intermediate coating film, and a top coating film for the purpose of providing corrosion protection and aesthetics. And while driving a car, roll up pebbles, gravel, antifreezing agent, ice block, etc. on the road surface, and these collide with the outer plate of the vehicle body and scratch the multilayer coating film. Damages or drops off locally, resulting in defects such as loss of appearance, exposure of the metal base, rusting and corrosion (this phenomenon is called “chipping”).
[0003]
Conventionally, a paint containing a hydroxyl group-containing polyester resin and a melamine resin has been used as an intermediate coating material for forming these multilayer coating films, but it has been difficult to prevent chipping.
[0004]
[Means for Solving the Problems]
The object of the present invention is to eliminate the above-mentioned defects, and as a result of intensive studies, the urethane-modified polyester resin in which a hydroxyl group and a blocked isocyanate group coexist in one molecule, a crosslinking agent, and the glass transition temperature of the core part and the shell part are It has been found that an aqueous coating composition containing different vinyl resin particles forms a coating film excellent in chipping resistance, and has completed the present invention.
[0005]
That is, the present invention includes (A) a urethane-modified polyester resin in which a hydroxyl group and a blocked isocyanate group coexist in one molecule, and (B) a crosslinking agent.As melamine resinAnd (C)The glass transition temperature of the core part is −80 to 0 ° C., and the glass transition temperature of the shell part is 40 to 120 ° C.Contains vinyl resin particlesAnd the content of the component (C) is 5 to 30 parts by weight per 100 parts by weight of the total of the components (A) and (B).An aqueous coating composition (hereinafter referred to as “the present composition”) is provided.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Below, this composition is demonstrated concretely.
[0007]
(A) Component: Urethane-modified polyester resin in which hydroxyl group and blocked isocyanate group coexist in one molecule
The component (A) can be obtained, for example, by subjecting a part of hydroxyl groups in the hydroxyl group-containing polyester resin to a urethanization reaction with a partially blocked polyisocyanate compound.
[0008]
The hydroxyl group-containing polyester resin has two or more hydroxyl groups in one molecule, and can be prepared by an esterification reaction of a polybasic acid and a polyhydric alcohol.
[0009]
A polybasic acid is a compound having two or more carboxyl groups in one molecule. For example, terephthalic acid, isophthalic acid, phthalic acid, naphthalenedicarboxylic acid, 4,4'-biphenyldicarboxylic acid, diphenylmethane-4,4 ' -Aromatic dicarboxylic acids such as dicarboxylic acids and anhydrides; alicyclic dicarboxylic acids such as hexahydroisophthalic acid, hexahydroterephthalic acid, hexahydrophthalic acid, tetrahydrophthalic acid and anhydrides; adipic acid, sebacic acid, Aliphatic dicarboxylic acids such as suberic acid, succinic acid, glutaric acid, maleic acid, chloromaleic acid, fumaric acid, dodecanedioic acid, pimelic acid, azelaic acid, itaconic acid, citraconic acid, dimer acid and the anhydrides thereof; Lower alkyl such as methyl ester and ethyl ester of dicarboxylic acid Examples of esters include tribasic or higher polybasic acids such as trimellitic acid, trimellitic anhydride, pyromellitic acid, pyrometic anhydride, trimesic acid, methylcyclohexentricarboxylic acid, tetrachlorohexenticarboxylic acid, and anhydrides thereof.
[0010]
The polyhydric alcohol is a compound having two or more hydroxyl groups in one molecule, such as ethylene glycol, propylene glycol, diethylene glycol, trimethylene glycol, tetraethylene glycol, triethylene glycol, dipropylene glycol, 1,4-butane. Diol, 1,3-butanediol, 2,3-butanediol, 1,2-butanediol, 3-methyl-1,2-butanediol, 1,2-pentanediol, 1,5-pentanediol, 1, 4-pentanediol, 2,4-pentanediol, 2,3-dimethyltrimethylene glycol, tetramethylene glycol, 3-methyl-4,3-pentanediol, 3-methyl-4,5-pentanediol, 2,2 , 4-trimethyl-1,3-pentanediol, 1, -Dihydric alcohols such as hexanediol, 1,5-hexanediol, 1,4-hexanediol, 2,5-hexanediol, neopentyl glycol, and hydroxypivalic acid neopentyl glycol ester; Polylactone diols added with lactones such as ε-caprolactone; ester diols such as bis (hydroxyethyl) terephthalate; alkylene oxide adducts of bisphenol A, polyether diols such as polyethylene glycol, polypropylene glycol, polybutylene glycol; Mono, such as α-olefin epoxides such as propylene oxide and butylene oxide, Cardura E10 [manufactured by Shell Chemical Co., Ltd., trade name, glycidyl ester of synthetic hyperbranched saturated fatty acid] Poxy compounds; trivalent or higher alcohols such as glycerin, trimethylolpropane, trimethylolethane, diglycerin, triglycerin, 1,2,6-hexanetriol, pentaerythritol, dipentaerythritol, sorbitol, mannitol; Polylactone polyols obtained by adding a lactone such as ε-caprolactone to an alcohol having a valency or higher; 1,4-cyclohexanedimethanol, tricyclodecane dimethanol, hydrogenated bisphenol A, hydrogenated bisphenol F, hydrogenated bisphenol A, and Examples thereof include alicyclic polyhydric alcohols such as hydrogenated bisphenol F.
[0011]
The esterification reaction of the polybasic acid and the polyhydric alcohol for preparing the hydroxyl group-containing polyester resin can be carried out by a method known per se with an excess of hydroxyl groups.
[0012]
The partially blocked polyisocyanate compound is a compound in which a free isocyanate group not blocked in one molecule and a blocked isocyanate group blocked with a blocking agent coexist, for example, a part of the free isocyanate group in the polyisocyanate compound. It is obtained by blocking with a blocking agent.
[0013]
The polyisocyanate compound is a compound having two or more free isocyanate groups not blocked in one molecule. Specifically, hexamethylene diisocyanate, trimethylene diisocyanate, 1,4-tetramethylene diisocyanate, pentamethylene diisocyanate, 1,2-propylene diisocyanate, 1,2-butylene diisocyanate, 2,3-butylene diisocyanate, 1,3- Aliphatic diisocyanate compounds such as butylene diisocyanate, trimethylhexamethylene diisocyanate, dimer acid diisocyanate, lysine diisocyanate; isophorone diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), methylcyclohexane-2,4- (or -2,6- ) Diisocyanate, 1,3- (or 1,4-) di (isocyanatomethyl) cyclohexane, 1,4-cyclohexane diisocyanate Cycloaliphatic diisocyanate compounds such as 1,3-cyclopentane diisocyanate and 1,2-cyclohexane diisocyanate; xylylene diisocyanate, metaxylylene diisocyanate, tetramethylxylylene diisocyanate, tolylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, 1,4-naphthalene diisocyanate, 4,4'-toluidine diisocyanate, 4,4'-diphenyl ether diisocyanate, (m- or p-) phenylene diisocyanate, 4,4'-biphenylene Diisocyanate, 3,3′-dimethyl-4,4′-biphenylene diisocyanate, bis (4-isocyanatophenyl) sulfone, isopropylidenebis (4-phenyl ester) Aromatic diisocyanate compounds such as cyanate); triphenylmethane-4,4 ′, 4 ″ -triisocyanate, 1,3,5-triisocyanatobenzene, 2,4,6-triisocyanatotoluene, 4,4 ′ -Polyisocyanate compounds having three or more isocyanate groups in one molecule such as dimethyldiphenylmethane-2,2 ', 5,5'-tetraisocyanate; ethylene glycol, propylene glycol, 1,4-butylene glycol, di Urethane adducts obtained by reacting a polyisocyanate compound in an excess ratio of isocyanate groups with hydroxyl groups of polyols such as methylolpropionic acid, polyalkylene glycol, trimethylolpropane, hexanetriol; hexamethylene diisocyanate, isophorone dii Soshi Examples thereof include burette type adducts such as anate, tolylene diisocyanate, xylylene diisocyanate, 4,4'-diphenylmethane diisocyanate, 4,4'-methylenebis (cyclohexyl isocyanate), isocyanuric ring type adducts, and the like.
[0014]
The blocking agent blocks a free isocyanate group, and can easily react with a hydroxyl group or the like when heated to, for example, 100 ° C. or higher, preferably 130 ° C. or higher.
[0015]
Examples of such blocking agents include phenols such as phenol, cresol, xylenol, nitrophenol, ethylphenol, hydroxydiphenyl, butylphenol, isopropylphenol, nonylphenol, octylphenol, and hydroxybenzoic acid methyl; ε-caprolactam, δ-valerolactam, γ -Lactams such as butyrolactam and β-propiolactam; aliphatics such as methanol, ethanol, propyl alcohol, butyl alcohol, amyl alcohol, lauryl alcohol; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, Diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, propylene Ether series such as recall monomethyl ether and methoxymethanol; benzyl alcohol; glycolic acid; glycolic acid esters such as methyl glycolate, ethyl glycolate, and butyl glycolate; lactic acid esters such as lactic acid, methyl lactate, ethyl lactate, and butyl lactate; methylol Alcohol systems such as urea, methylol melamine, diacetone alcohol, 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate; formamidoxime, acetoaldoxime, acetoxime, methyl ethyl ketoxime, diacetyl monooxime, benzophenone oxime, Oxime systems such as cyclohexane oxime; active methylene systems such as dimethyl malonate, diethyl malonate, ethyl acetoacetate, methyl acetoacetate, acetylacetone; Mercaptans such as butyl mercaptan, t-butyl mercaptan, hexyl mercaptan, t-dodecyl mercaptan, 2-mercaptobenzothiazole, thiophenol, methylthiophenol, ethylthiophenol; Acid amides such as stearamide, benzamide; imides such as succinimide, phthalimide, maleic imide; diphenylamine, phenylnaphthylamine, xylidine, N-phenylxylidine, carbazole, aniline, naphthylamine, butylamine, dibutylamine Amines such as butylphenylamine; imidazoles such as imidazole and 2-ethylimidazole; pyrazoles; Urea, such as silicon, thiourea, ethyleneurea, ethylenethiourea, diphenylurea; carbamates such as phenyl N-phenylcarbamate; imines such as ethyleneimine and propyleneimine; sodium bisulfite, potassium bisulfite, etc. Examples thereof include sulfite.
[0016]
In preparing the component (A), a part of the isocyanate group in the polyisocyanate compound is blocked with a blocking agent, and a partially blocked polyisocyanate compound in which a free isocyanate group and a blocked blocked isocyanate group coexist in one molecule. It is preferable to prepare in advance. The reaction between the polyisocyanate compound and the blocking agent can be carried out under known conditions. Further, the ratio of both components is particularly within the range in which the resulting partially blocked polyisocyanate compound has at least one free isocyanate group and one blocked isocyanate group per molecule. There is no limit.
[0017]
(A) component is obtained by making this partial block polyisocyanate compound react with the one part hydroxyl group in a hydroxyl-containing polyester resin. The urethanization reaction between the partially blocked polyisocyanate compound and the hydroxyl group-containing polyester resin can be performed by a known method.
[0018]
The component (A) is also blocked by blocking the remaining isocyanate groups of the product obtained by reacting a part of the isocyanate groups of the unblocked polyisocyanate compound with a part of the hydroxyl groups in the hydroxyl group-containing polyester resin. Is obtained.
[0019]
In addition, a product obtained by reacting the above polyhydric alcohol (including a carboxyl group-containing polyhydric alcohol such as dimethylolpropionic acid), a partially blocked polyisocyanate compound and an unblocked polyisocyanate compound in an excess ratio of isocyanate groups. The component (A) can be obtained by reacting with some hydroxyl groups in the hydroxyl group-containing polyester resin.
[0020]
The component (A) thus obtained has a hydroxyl value of 20 to 200 mgKOH / g, particularly 40 to 120 mgKOH / g, an isocyanate group value of 5 to 120 mgKOH / g, particularly 10 to 50, and an acid value of 100 mgKOH / g or less, particularly 10 -60 mgKOH / g, number average molecular weight is 1000-20000, Especially within the range of 1500-10000 is preferable.
[0021]
(B) Component: Crosslinking agent
The component that can react with the hydroxyl group of the component (A) can be suitably used as the component (B), and specific examples include melamine resins and block polyisocyanate compounds.
[0022]
Examples of the melamine resin include a methylolated amino resin obtained by a reaction between melamine and an aldehyde. Examples of aldehydes include formaldehyde, paraformaldehyde, acetaldehyde, and benzaldehyde. Moreover, what methylated the methylol group of this methylolated amino resin partially or entirely with monoalcohol can also be used. Examples of the monoalcohol used for etherification include methyl alcohol, ethyl alcohol, n-propyl alcohol, i-propyl alcohol, n-butyl alcohol, i-butyl alcohol, 2-ethylbutanol, 2-ethylhexanol and the like.
[0023]
In the present composition, as component (B), melamine in which 3 or more methylol groups are averaged as a methyl ether per triazine nucleus, or a melamine in which a part of the methoxy group is substituted with a monoalcohol having 2 or more carbon atoms. A hydrophilic melamine which is a resin and further has an imino group and has an average degree of condensation of about 2 or less and a mononuclear ratio of about 50% by weight or more can be suitably used.
[0024]
As the block polyisocyanate compound, a compound in which all isocyanate groups of a polyisocyanate compound having two or more free isocyanate groups in one molecule are blocked with a blocking agent can be used. As the polyisocyanate compound and the blocking agent, those exemplified in the above component (A) can be preferably used, and the reaction by both components can be carried out by a known method.
[0025]
Component (C): Vinyl resin particles having different glass transition temperatures between the core and shell
Particles having a so-called core-shell type multilayer structure in which a shell part (skin part) is formed around the core part (core part), both of which are composed of a vinyl resin obtained by polymerization of a vinyl monomer. It is preferable that
[0026]
In this composition, it is necessary for the glass transition temperature (Tg) of the vinyl resin of the core part and shell part in (C) component to differ. Specifically, the Tg of the core part is within the range of −80 to 0 ° C., particularly −20 to −60 ° C., and the Tg of the shell part is within the range of 40 to 120 ° C., particularly 80 to 110 ° C. Is suitable. These Tg adjustments can be easily performed by the composition and ratio of the vinyl monomer.
[0027]
The vinyl monomer used to form the vinyl resin of the core part and the shell part is a compound having one or more polymerizable unsaturated bonds in one molecule, and is not particularly limited, and is exemplified below. Monomer.
[0028]
1) C1-C20 alkyl (meta) such as methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, lauryl (meth) acrylate, etc. ) Acrylate,
2) Vinyl esters such as vinyl acetate and vinyl propionate,
3) Vinyl halides or vinylidene halides such as vinyl chloride, vinyl fluoride, vinylidene chloride, vinylidene fluoride,
4) Nitrogen-containing vinyl monomers such as (meth) acrylonitrile, (meth) acrylamide, methylol (meth) acrylamide,
5) Aromatic vinyl monomers such as styrene, α-methylstyrene, vinyltoluene,
6) C2-C8 hydroxyalkyl esters of (meth) acrylic acid such as hydroxyethyl (meth) acrylate, hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate; polyethylene glycol, polyprolene Monoesters of polyether polyols such as glycol and polybutylene glycol and unsaturated carboxylic acids such as (meth) acrylic acid; polyether polyols such as polyethylene glycol, polyprolene glycol and polybutylene glycol and hydroxyethyl (meth) acrylate, etc. Mono-ethers with hydroxyl group-containing unsaturated monomers; α, β-unsaturated carboxylic acids, monos such as Cardura E10 (manufactured by Shell Chemical Co., Ltd., trade name) and α-olefin epoxides Adducts with epoxy compounds; Adducts of glycidyl (meth) acrylate with monobasic acids such as acetic acid, propionic acid, pt-butylbenzoic acid and fatty acids; acid anhydride groups such as maleic anhydride and itaconic anhydride Monoester or diesterified product of an unsaturated monomer containing and glycols such as ethylene glycol, 1,6-hexane glycol, neopentyl glycol; hydroxyalkyl vinyl ethers such as hydroxyethyl vinyl ether; 3-chloro-2-hydroxy Hydroxyl group-containing vinyl monomers containing chlorine such as propyl (meth) acrylate; hydroxyl group-containing vinyl monomers such as allyl alcohol,
7) Carboxyl group-containing vinyl monomers such as (meth) acrylic acid and maleic acid,
8) Diene monomers such as butadiene and isoprene.
[0029]
The component (C) can be prepared by known emulsion polymerization or suspension polymerization using the above-mentioned vinyl monomer, the shape thereof is fine particles, and the particle size is 50 to 1000 nm, particularly 80 to 700 nm. The range of is suitable.
[0030]
The constituent ratios of the components (A), (B) and (C) in the present composition are not particularly limited and can be arbitrarily selected according to the purpose. For example, the components (A) and (B) The component (A) is preferably in the range of 50 to 90% by weight, particularly 65 to 85% by weight, and the component (B) is preferably in the range of 50 to 10% by weight, particularly 35 to 15% by weight. The component (C) is suitably 5 to 30 parts by weight, particularly 8 to 15 parts by weight per 100 parts by weight of the total of the components (A) and (B).
[0031]
This composition can be prepared by mixing and dispersing the above components (A), (B) and (C) in water. Among these, it is more preferable that the component (A) has a carboxyl group in the molecule because the water dispersibility is improved by neutralizing it with a neutralizing agent. Examples of the neutralizing agent include hydroxides of alkali metals or alkaline earth metals such as sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, barium hydroxide; ammonia; ethylamine, propylamine, butylamine, benzyl Primary monoamines such as amine, monoethanolamine, neopentanolamine, 2-aminopropanol, 3-aminopropanol; diethylamine, diethanolamine, di-n- or di-iso-propanolamine, N-methylethanolamine, N -Secondary monoamines such as ethylethanolamine; Tertiary monoamines such as dimethylethanolamine, trimethylamine, triethylamine, triisopropylamine, methyldiethanolamine, dimethylaminoethanol; And polyamines such as triamine, hydroxyethylaminoethylamine, ethylaminoethylamine, and methylaminopropylamine.
[0032]
In addition to the component (A), the component (B) and the component (C), the composition further comprises a hydroxyl group-containing polyester resin, a hydroxyl group-containing urethane resin, a solid color pigment, a metallic pigment, and a light interference pigment. Extender pigments, dispersants, anti-settling agents, organic solvents, catalysts for promoting urethanization reactions (for example, organotin compounds), catalysts for promoting crosslinking reaction between hydroxyl groups and melamine resins (for example, acid catalysts), antifoaming agents, A thickener, a rust preventive agent, a surface conditioner, etc. can be mix | blended suitably.
[0033]
Among these, the hydroxyl group-containing polyester resin can be prepared by using an esterification reaction by a known method using the polybasic acid and polyhydric alcohol exemplified in the component (A), and having a hydroxyl value of 50 to 50. 200 mg KOH / g, especially 70 to 150 mg KOH / g, acid value 5 to 100 mg KOH / g, especially 10 to 60 mg KOH / g, number average molecular weight is preferably 1000 to 20000, especially 1500 to 10,000, (Block) has no isocyanate group.
[0034]
Further, the hydroxyl group-containing urethane resin can be prepared by urethanization reaction by a known method using the polyisocyanate compound, polyhydric alcohol and hydroxyl group-containing polyester resin exemplified in the description of the component (A), A hydroxyl value of 50 to 200 mgKOH / g, particularly 70 to 150 mgKOH / g, an acid value of 5 to 100 mgKOH / g, particularly 10 to 60 mgKOH / g, and a number average molecular weight of 1000 to 20000, particularly preferably in the range of 1500 to 10,000, This has no (blocked) isocyanate groups in the molecule.
[0035]
These hydroxyl group-containing polyester resins and hydroxyl group-containing urethane resins neutralize the carboxyl groups that may be contained in the molecules as necessary in the same manner as described above, and then, part of the above component (A) is used. The ratio can be blended by replacing 75% by weight or less of these blending ratios of component (A) with these resins.
[0036]
The composition can be applied by known methods such as brush coating, air spray, airless spray, electrostatic coating, etc., and the film thickness is in the range of 10 to 100 μm, particularly 20 to 60 μm, as a cured coating film. The inside is preferable, and the coating film can be crosslinked and cured by heating at 120 to 170 ° C., particularly 130 to 160 ° C. for 10 to 40 minutes.
[0037]
Since the coating film formed by this composition has excellent chipping resistance, the intermediate coating in a multi-layer coating film comprising an undercoat film, an intermediate coating film and an upper coating film formed on the outer plate portion of an automobile body, etc. It is preferably used for forming a coating film.
[0038]
Specifically, an undercoating paint such as a cationic electrodeposition paint is applied to an automobile body, and the coating film is applied to the coating surface with or without curing the coating film. Is heated or cured, or without being cured, by applying a top coating on the coated surface and heating to cure these coatings.
[0039]
Solid color paints, metallic paints, light interference paints, clear paints, etc. can be used as the top coat, and one or more kinds selected from these can be used to form a single layer, two or more layers of top coat. Can be formed. As these cationic electrodeposition paints and topcoat paints (which can be applied in either an organic solvent system or water system), paints known per se can be used.
[0040]
By using this composition for the formation of an intermediate coating film in a multilayer coating film comprising an undercoat film, an intermediate coating film and an upper coating film formed on the outer plate portion of an automobile body, etc., a multilayer coating film The chipping resistance was significantly improved.
[0041]
【Example】
Below, the Example and comparative example regarding this invention are described. Both parts and% are based on weight, and the film thickness is for the cured film.
[0042]
1. Sample preparation
1) Component (A)
(A-1): Trimethylolpropane 0.2 mol, 1,6-hexanediol 0.8 mol, cyclohexyldicarboxylic acid 0, 4 mol and adipic acid 0.3 mol were reacted, and trimellitic anhydride was further reacted Polyester resin (100 parts) obtained by adding 0.05 mol to polyurethane (30 parts) obtained by reacting 2 mol of 4,4'-methylenebis (cyclohexyl isocyanate) and 1 mol of dimethylolpropionic acid in methyl ethyl ketone. A half-blocked polyisocyanate compound (10) obtained by reacting methyl ethyl ketone oxime with 4,4′-methylenebis (cyclohexyl isocyanate) in an equimolar ratio to a part of the hydroxyl group contained in the product (130 parts) obtained by the reaction of Part), then remove the solvent and add dimethylethanolamine. Neutralized and mixed with water to obtain an aqueous dispersion. The component (A-1) thus obtained had a hydroxyl value of 90 mgKOH / g, an acid value of 38 mgKOH / g, an NCO value of 10, and a number average molecular weight of 2000.
[0043]
(A-2): According to component (A-1), except that “4,4′-methylenebis (cyclohexyl isocyanate)” in component (A-1) is changed to “tetramethylxylylene diisocyanate”. (A-2) component was obtained. The hydroxyl value of the obtained component (A-2) was 90 mgKOH / g, the acid value was 38 mgKOH / g, the NCO value was 10, and the number average molecular weight was 2000.
[0044]
2) Component (B)
(B-1): “Cymel 325” (trade name, imino group-containing melamine resin, manufactured by Mitsui Cytec).
3) Component (C)
(C-1): “STAPHYLOID AC4030” (trade name, core-shell type vinyl resin particles, manufactured by Takeda Pharmaceutical Company Limited). The glass transition temperature of the core portion is -40 ° C, the glass transition temperature of the shell portion is 110 ° C, and the particle size is 500 nm.
[0045]
(C-2): “Staffyroid AC3364” (trade name, core / shell type vinyl resin particles, manufactured by Takeda Pharmaceutical Company Limited). The glass transition temperature of the core portion is -40 ° C, the glass transition temperature of the shell portion is 110 ° C, and the particle size is 100 nm.
[0046]
4) Other ingredients
Polyester resin: neopentyl glycol 0.27 mol, trimethylolpropane 0.33 mol, butylethylpropanediol 0.4 mol, isophthalic acid 0.25 mol, adipic acid 0.3 mol and hexahydrophthalic anhydride 0.3 mol After adding 0.05 mol of trimellitic anhydride to the product obtained by reacting, the solvent was removed, neutralized with dimethylethanolamine, and mixed with water to obtain an aqueous dispersion. The obtained polyester resin had a hydroxyl value of 130 mgKOH / g, an acid value of 25 mgKOH / g, and a number average molecular weight of 1800.
[0047]
5) Pigment
Titanium white: “JR806” (trade name, manufactured by Teika)
Carbon black: “Carbon black MA100” (trade name, manufactured by Mitsubishi Chemical Corporation)
2. Examples and Comparative Examples
Using the above samples, they were blended at the ratios (solid content ratios) shown in Table 1 to obtain an aqueous coating composition of the present invention having a solid content of 50%.
[0048]
Cationic electrodeposition paint ("Electron GT10", trade name, epoxy resin system) is applied to a steel sheet whose surface is chemically treated with zinc phosphate so as to have a film thickness of 20 μm and heated at 170 ° C. for 30 minutes. After the coating film is cured, the aqueous coating composition shown in Table 1 is applied to the coating surface to a film thickness of 30 μm, heated at 150 ° C. for 30 minutes to cure, and then the metallic coating (“ “Magiclon TB515” manufactured by Kansai Paint Co., Ltd., trade name, polyester / melamine resin) was applied to a film thickness of 15 μm and allowed to stand at room temperature for 3 minutes. (Trade name, acrylic / melamine resin system) was applied to a film thickness of 35 μm and heated at 140 ° C. for 30 minutes to cure both coating films together.
[0049]
The performance test of the multilayer coating film thus formed was carried out, and the results are also shown in Table 1. The test method is as follows.
[0050]
Chipping resistance: A test plate was placed on a specimen holder of a Q-G-R gravelometer (chipping test device) manufactured by Q-PANEL, USA, and 3 kg / cm at -20 ° C.2No. 7 granite crushed stone was sprayed onto the coating surface with compressed air of No. 7, and the degree of scratches on the coating film was visually observed and evaluated. ○ indicates a small scratch size and the intermediate coating film (the coating film of the present composition) is exposed. Δ indicates a small scratch size but the base steel sheet is exposed. Shows that the size of the scratch is quite large and the base steel plate is also exposed greatly.
[0051]
Smoothness: a result of visual observation of the surface of the multilayer coating film. ○ is good smoothness, △ is slightly inferior in smoothness,
X indicates very poor smoothness.
[0052]
Adhesion: Cut to reach the base of the cutter, make 100 2mm x 2mm goby meshes, apply adhesive cellophane tape to the coated surface, and remove the tape suddenly at 20 ° C. The number of coatings was examined. ○ indicates that 100 remain, Δ indicates that 99 to 95 remain, and × indicates that 94 or less remain.
[0053]
Water resistance: a result of visual observation of the coated surface after the test plate was immersed in warm water of 40 ° C. for 10 days. ○ indicates no occurrence of blisters, Δ indicates that some blisters are observed, and × indicates that many blisters are observed.
[0054]
[Table 1]
Table 1
Claims (2)
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| JP2000352086A JP4790902B2 (en) | 2000-11-20 | 2000-11-20 | Water-based paint composition |
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| JP2005154674A (en) * | 2003-11-28 | 2005-06-16 | Nippon Polyurethane Ind Co Ltd | Method for producing polyurethane emulsion for aqueous one-component coating agent |
| CA2636245C (en) | 2006-01-23 | 2011-03-15 | Kansai Paint Co., Ltd. | Aqueous intermediate coating composition and method for forming multilayer coating film |
| TWI600701B (en) * | 2012-07-19 | 2017-10-01 | 長瀨化成股份有限公司 | A semiconductor sealing epoxy resin composition and a method of manufacturing the semiconductor device |
| JP6104028B2 (en) * | 2013-04-17 | 2017-03-29 | Basfジャパン株式会社 | Multi-layer coating formation method |
| KR101775765B1 (en) * | 2014-12-24 | 2017-09-06 | 주식회사 케이씨씨 | Paint composition and manufacturing method thereof |
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| JPH0735493B2 (en) * | 1987-10-23 | 1995-04-19 | 日本ペイント株式会社 | Intermediate coating composition |
| JP3074008B2 (en) * | 1990-09-26 | 2000-08-07 | 関西ペイント株式会社 | Resin composition |
| JPH0693228A (en) * | 1992-09-09 | 1994-04-05 | Kansai Paint Co Ltd | Method for forming coating film |
| JPH06256714A (en) * | 1993-03-04 | 1994-09-13 | Kansai Paint Co Ltd | Coating composition |
| JP3248770B2 (en) * | 1993-04-08 | 2002-01-21 | サンスター技研株式会社 | Automotive chipping resistant material |
| JPH06346024A (en) * | 1993-06-04 | 1994-12-20 | Nippon Paint Co Ltd | Composition for chipping resistant coating and formation of chipping resistant coat |
| JP3365847B2 (en) * | 1994-02-17 | 2003-01-14 | 日本ペイント株式会社 | Chipping resistant coating composition and method for forming chipping resistant composite coating film |
| JPH08209066A (en) * | 1995-02-07 | 1996-08-13 | Kansai Paint Co Ltd | Aqueous coating material for middle coating |
| JP3974759B2 (en) * | 2001-07-05 | 2007-09-12 | 関西ペイント株式会社 | Waterborne intermediate coating |
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