CA1317394C - High solids coating compositions containing a polyepoxide and a copolymer of an alpha-olefin and an olefinically unsaturated monoanhydride - Google Patents
High solids coating compositions containing a polyepoxide and a copolymer of an alpha-olefin and an olefinically unsaturated monoanhydrideInfo
- Publication number
- CA1317394C CA1317394C CA000571895A CA571895A CA1317394C CA 1317394 C CA1317394 C CA 1317394C CA 000571895 A CA000571895 A CA 000571895A CA 571895 A CA571895 A CA 571895A CA 1317394 C CA1317394 C CA 1317394C
- Authority
- CA
- Canada
- Prior art keywords
- composition
- weight
- copolymer
- polyepoxide
- percent
- 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
- 229920001577 copolymer Polymers 0.000 title claims abstract description 40
- 239000007787 solid Substances 0.000 title claims abstract description 40
- 239000008199 coating composition Substances 0.000 title claims abstract description 38
- 239000004711 α-olefin Substances 0.000 title claims abstract description 16
- 229920000647 polyepoxide Polymers 0.000 title claims description 26
- 238000000576 coating method Methods 0.000 claims abstract description 44
- 239000011230 binding agent Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 150000001925 cycloalkenes Chemical class 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 88
- 239000004593 Epoxy Substances 0.000 claims description 26
- 239000011248 coating agent Substances 0.000 claims description 26
- 239000000178 monomer Substances 0.000 claims description 21
- 239000000758 substrate Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 150000008064 anhydrides Chemical class 0.000 claims description 14
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 12
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 claims description 11
- 229920005862 polyol Polymers 0.000 claims description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 10
- 125000003700 epoxy group Chemical group 0.000 claims description 10
- 150000003077 polyols Chemical class 0.000 claims description 8
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 claims description 6
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 6
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical group O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 6
- 229920000728 polyester Polymers 0.000 claims description 6
- 150000002148 esters Chemical class 0.000 claims description 5
- 239000003960 organic solvent Substances 0.000 claims description 5
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 claims description 4
- ZWAJLVLEBYIOTI-OLQVQODUSA-N (1s,6r)-7-oxabicyclo[4.1.0]heptane Chemical group C1CCC[C@@H]2O[C@@H]21 ZWAJLVLEBYIOTI-OLQVQODUSA-N 0.000 claims description 3
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric Acid Chemical compound [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 239000002585 base Substances 0.000 description 38
- 239000004615 ingredient Substances 0.000 description 26
- -1 acrylic polyols Chemical class 0.000 description 19
- 229920000058 polyacrylate Polymers 0.000 description 16
- AOGQPLXWSUTHQB-UHFFFAOYSA-N hexyl acetate Chemical compound CCCCCCOC(C)=O AOGQPLXWSUTHQB-UHFFFAOYSA-N 0.000 description 14
- 238000010992 reflux Methods 0.000 description 14
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 12
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 12
- 238000007792 addition Methods 0.000 description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 11
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 9
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 9
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 9
- 238000009472 formulation Methods 0.000 description 9
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 9
- 239000011541 reaction mixture Substances 0.000 description 9
- 239000008096 xylene Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 239000003054 catalyst Substances 0.000 description 6
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 239000004793 Polystyrene Substances 0.000 description 5
- 239000002253 acid Substances 0.000 description 5
- 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 5
- 239000000049 pigment Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- VYKXQOYUCMREIS-UHFFFAOYSA-N methylhexahydrophthalic anhydride Chemical compound C1CCCC2C(=O)OC(=O)C21C VYKXQOYUCMREIS-UHFFFAOYSA-N 0.000 description 4
- AFFLGGQVNFXPEV-UHFFFAOYSA-N n-decene Natural products CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 4
- 150000002924 oxiranes Chemical class 0.000 description 4
- 229920002223 polystyrene Polymers 0.000 description 4
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 4
- 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 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 235000019445 benzyl alcohol Nutrition 0.000 description 3
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229920001228 polyisocyanate Polymers 0.000 description 3
- 239000005056 polyisocyanate Substances 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- 229920002554 vinyl polymer Polymers 0.000 description 3
- 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 2
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 2
- AYKYXWQEBUNJCN-UHFFFAOYSA-N 3-methylfuran-2,5-dione Chemical compound CC1=CC(=O)OC1=O AYKYXWQEBUNJCN-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 208000012641 Pigmentation disease Diseases 0.000 description 2
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- PFURGBBHAOXLIO-UHFFFAOYSA-N cyclohexane-1,2-diol Chemical compound OC1CCCCC1O PFURGBBHAOXLIO-UHFFFAOYSA-N 0.000 description 2
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cyclohexene Chemical compound C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000007590 electrostatic spraying Methods 0.000 description 2
- 125000004185 ester group Chemical group 0.000 description 2
- 150000002170 ethers Chemical class 0.000 description 2
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 150000002989 phenols Chemical class 0.000 description 2
- 230000019612 pigmentation Effects 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 125000001424 substituent group Chemical group 0.000 description 2
- 229940014800 succinic anhydride Drugs 0.000 description 2
- FPGGTKZVZWFYPV-UHFFFAOYSA-M tetrabutylammonium fluoride Chemical compound [F-].CCCC[N+](CCCC)(CCCC)CCCC FPGGTKZVZWFYPV-UHFFFAOYSA-M 0.000 description 2
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 1
- KMOUUZVZFBCRAM-OLQVQODUSA-N (3as,7ar)-3a,4,7,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1C=CC[C@@H]2C(=O)OC(=O)[C@@H]21 KMOUUZVZFBCRAM-OLQVQODUSA-N 0.000 description 1
- CXENHBSYCFFKJS-OXYODPPFSA-N (Z,E)-alpha-farnesene Chemical compound CC(C)=CCC\C(C)=C\C\C=C(\C)C=C CXENHBSYCFFKJS-OXYODPPFSA-N 0.000 description 1
- CRSBERNSMYQZNG-UHFFFAOYSA-N 1 -dodecene Natural products CCCCCCCCCCC=C CRSBERNSMYQZNG-UHFFFAOYSA-N 0.000 description 1
- HCNHNBLSNVSJTJ-UHFFFAOYSA-N 1,1-Bis(4-hydroxyphenyl)ethane Chemical compound C=1C=C(O)C=CC=1C(C)C1=CC=C(O)C=C1 HCNHNBLSNVSJTJ-UHFFFAOYSA-N 0.000 description 1
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 1
- YAXKTBLXMTYWDQ-UHFFFAOYSA-N 1,2,3-butanetriol Chemical compound CC(O)C(O)CO YAXKTBLXMTYWDQ-UHFFFAOYSA-N 0.000 description 1
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 1
- 229940043375 1,5-pentanediol Drugs 0.000 description 1
- DSCFFEYYQKSRSV-UHFFFAOYSA-N 1L-O1-methyl-muco-inositol Natural products COC1C(O)C(O)C(O)C(O)C1O DSCFFEYYQKSRSV-UHFFFAOYSA-N 0.000 description 1
- JCTXKRPTIMZBJT-UHFFFAOYSA-N 2,2,4-trimethylpentane-1,3-diol Chemical compound CC(C)C(O)C(C)(C)CO JCTXKRPTIMZBJT-UHFFFAOYSA-N 0.000 description 1
- FXNDIJDIPNCZQJ-UHFFFAOYSA-N 2,4,4-trimethylpent-1-ene Chemical compound CC(=C)CC(C)(C)C FXNDIJDIPNCZQJ-UHFFFAOYSA-N 0.000 description 1
- ZGFAOLWBZADSGA-UHFFFAOYSA-N 2-(2,3-dimethylphenyl)propan-2-ylazanium;acetate Chemical compound CC([O-])=O.CC1=CC=CC(C(C)(C)[NH3+])=C1C ZGFAOLWBZADSGA-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
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- FSGAMPVWQZPGJF-UHFFFAOYSA-N 2-methylbutan-2-yl ethaneperoxoate Chemical compound CCC(C)(C)OOC(C)=O FSGAMPVWQZPGJF-UHFFFAOYSA-N 0.000 description 1
- RCBGGJURENJHKV-UHFFFAOYSA-N 2-methylhept-1-ene Chemical compound CCCCCC(C)=C RCBGGJURENJHKV-UHFFFAOYSA-N 0.000 description 1
- WVRNUXJQQFPNMN-VAWYXSNFSA-N 3-[(e)-dodec-1-enyl]oxolane-2,5-dione Chemical compound CCCCCCCCCC\C=C\C1CC(=O)OC1=O WVRNUXJQQFPNMN-VAWYXSNFSA-N 0.000 description 1
- CXJAFLQWMOMYOW-UHFFFAOYSA-N 3-chlorofuran-2,5-dione Chemical compound ClC1=CC(=O)OC1=O CXJAFLQWMOMYOW-UHFFFAOYSA-N 0.000 description 1
- AXGOOCLYBPQWNG-UHFFFAOYSA-N 3-ethylfuran-2,5-dione Chemical compound CCC1=CC(=O)OC1=O AXGOOCLYBPQWNG-UHFFFAOYSA-N 0.000 description 1
- JBTJZGIYWMHQLX-UHFFFAOYSA-N 3-methoxyfuran-2,5-dione Chemical compound COC1=CC(=O)OC1=O JBTJZGIYWMHQLX-UHFFFAOYSA-N 0.000 description 1
- DFATXMYLKPCSCX-UHFFFAOYSA-N 3-methylsuccinic anhydride Chemical compound CC1CC(=O)OC1=O DFATXMYLKPCSCX-UHFFFAOYSA-N 0.000 description 1
- ZGZVGZCIFZBNCN-UHFFFAOYSA-N 4,4'-(2-Methylpropylidene)bisphenol Chemical compound C=1C=C(O)C=CC=1C(C(C)C)C1=CC=C(O)C=C1 ZGZVGZCIFZBNCN-UHFFFAOYSA-N 0.000 description 1
- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical compound C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 description 1
- YXALYBMHAYZKAP-UHFFFAOYSA-N 7-oxabicyclo[4.1.0]heptan-4-ylmethyl 7-oxabicyclo[4.1.0]heptane-4-carboxylate Chemical group C1CC2OC2CC1C(=O)OCC1CC2OC2CC1 YXALYBMHAYZKAP-UHFFFAOYSA-N 0.000 description 1
- KNDQHSIWLOJIGP-UHFFFAOYSA-N 826-62-0 Chemical compound C1C2C3C(=O)OC(=O)C3C1C=C2 KNDQHSIWLOJIGP-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 description 1
- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- GYCMBHHDWRMZGG-UHFFFAOYSA-N Methylacrylonitrile Chemical compound CC(=C)C#N GYCMBHHDWRMZGG-UHFFFAOYSA-N 0.000 description 1
- OKIZCWYLBDKLSU-UHFFFAOYSA-M N,N,N-Trimethylmethanaminium chloride Chemical compound [Cl-].C[N+](C)(C)C OKIZCWYLBDKLSU-UHFFFAOYSA-M 0.000 description 1
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 1
- ALQSHHUCVQOPAS-UHFFFAOYSA-N Pentane-1,5-diol Chemical compound OCCCCCO ALQSHHUCVQOPAS-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 238000007259 addition reaction Methods 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 125000005233 alkylalcohol group Chemical group 0.000 description 1
- HFDVRLIODXPAHB-UHFFFAOYSA-N alpha-tetradecene Natural products CCCCCCCCCCCCC=C HFDVRLIODXPAHB-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 235000006708 antioxidants Nutrition 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 125000003354 benzotriazolyl group Chemical class N1N=NC2=C1C=CC=C2* 0.000 description 1
- RSOILICUEWXSLA-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)N(C)C(C)(C)C1 RSOILICUEWXSLA-UHFFFAOYSA-N 0.000 description 1
- LMMDJMWIHPEQSJ-UHFFFAOYSA-N bis[(3-methyl-7-oxabicyclo[4.1.0]heptan-4-yl)methyl] hexanedioate Chemical compound C1C2OC2CC(C)C1COC(=O)CCCCC(=O)OCC1CC2OC2CC1C LMMDJMWIHPEQSJ-UHFFFAOYSA-N 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 125000002843 carboxylic acid group Chemical group 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 125000001309 chloro group Chemical group Cl* 0.000 description 1
- PMMYEEVYMWASQN-IMJSIDKUSA-N cis-4-Hydroxy-L-proline Chemical compound O[C@@H]1CN[C@H](C(O)=O)C1 PMMYEEVYMWASQN-IMJSIDKUSA-N 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- VSSAZBXXNIABDN-UHFFFAOYSA-N cyclohexylmethanol Chemical compound OCC1CCCCC1 VSSAZBXXNIABDN-UHFFFAOYSA-N 0.000 description 1
- URYYVOIYTNXXBN-UPHRSURJSA-N cyclooctene Chemical compound C1CCC\C=C/CC1 URYYVOIYTNXXBN-UPHRSURJSA-N 0.000 description 1
- 239000004913 cyclooctene Substances 0.000 description 1
- 229960002887 deanol Drugs 0.000 description 1
- 239000012972 dimethylethanolamine Substances 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- SZXQTJUDPRGNJN-UHFFFAOYSA-N dipropylene glycol Chemical compound OCCCOCCCO SZXQTJUDPRGNJN-UHFFFAOYSA-N 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- LDLDYFCCDKENPD-UHFFFAOYSA-N ethenylcyclohexane Chemical compound C=CC1CCCCC1 LDLDYFCCDKENPD-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- SUPCQIBBMFXVTL-UHFFFAOYSA-N ethyl 2-methylprop-2-enoate Chemical compound CCOC(=O)C(C)=C SUPCQIBBMFXVTL-UHFFFAOYSA-N 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 210000004905 finger nail Anatomy 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical class O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 1
- 125000005843 halogen group Chemical group 0.000 description 1
- FLBJFXNAEMSXGL-UHFFFAOYSA-N het anhydride Chemical compound O=C1OC(=O)C2C1C1(Cl)C(Cl)=C(Cl)C2(Cl)C1(Cl)Cl FLBJFXNAEMSXGL-UHFFFAOYSA-N 0.000 description 1
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 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
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 125000004029 hydroxymethyl group Chemical group [H]OC([H])([H])* 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- LRDFRRGEGBBSRN-UHFFFAOYSA-N isobutyronitrile Chemical compound CC(C)C#N LRDFRRGEGBBSRN-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002734 metacrylic acid derivatives Chemical class 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- YWFWDNVOPHGWMX-UHFFFAOYSA-N n,n-dimethyldodecan-1-amine Chemical compound CCCCCCCCCCCCN(C)C YWFWDNVOPHGWMX-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- RPQRDASANLAFCM-UHFFFAOYSA-N oxiran-2-ylmethyl prop-2-enoate Chemical compound C=CC(=O)OCC1CO1 RPQRDASANLAFCM-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920005906 polyester polyol Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 150000008442 polyphenolic compounds Chemical class 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 150000003856 quaternary ammonium compounds Chemical class 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 235000015096 spirit Nutrition 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 1
- AUHHYELHRWCWEZ-UHFFFAOYSA-N tetrachlorophthalic anhydride Chemical compound ClC1=C(Cl)C(Cl)=C2C(=O)OC(=O)C2=C1Cl AUHHYELHRWCWEZ-UHFFFAOYSA-N 0.000 description 1
- MRYQZMHVZZSQRT-UHFFFAOYSA-M tetramethylazanium;acetate Chemical compound CC([O-])=O.C[N+](C)(C)C MRYQZMHVZZSQRT-UHFFFAOYSA-M 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 150000004072 triols Chemical class 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
- C09D123/02—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D123/025—Copolymer of an unspecified olefine with a monomer other than an olefine
Abstract
Abstract of the Disclosure Curable, high solids, liquid coating compositions are dis-closed. The resinous binder comprises a copolymer of an alpha-olefin or cycloolefin and an olefinically unsaturated monoanhydride which may include a half-ester thereof. The coating compositions are useful as clear coats in color-plus-clear automotive coatings and have good humidity resistance and mar resistance.
Description
1 3~ 739~
HIGH SOLIDS COATING COMPOSITIONS
CONTAINING A POLYEPOXIDE AND A COPOLYMER OF AN ALPHA-OLEFIN
AND AN OLEFINICALLY UNSATU~ATED MONO~NHYDRIDE
Background of the Invention Field of the Invention: The present invention is in the field of curable compositions and more particularly to curable coating compositions which are useful as clear coats in color-plus-clear coating applications. The lnvention also relates to a process for preparing color-plus-clear coated articles and to the coated articles themselves.
Brief Description of the Prior Art: Color-plus-clear coat-ings involve the application of a colored or pigmented base coat to a substrate followed by the application of a transparent or clear top coat to the base coat. The composite coatings are becoming increasing-ly popular as original finishes for automobiles. The color-plus-clear coatings have outstanding gloss and distinctness of image, and the clear coat is particularly importan~ fsr these properties. Two-pack clear coat compositions comprising polyols such as polyester polyols, polyurethane polyols and acrylic polyols and polyisocyanate curing agents give outstanding gloss and distinctness of image along with good humidity resistance and mar resistance. ~owever, the polyisocyanates are difficult to handle being sensitive to moisture and require cumbersome safety precautions because of their toxicity.
U.S. Patent No. 4,650~718 discloses crosslinkable coating compositions which avoid the problems of polyisocyanate curing agents. The crosslinkable coating compositions are based on poly-epoxides and polyacid curing agents. Although these compositions can be formulated to produce cured coatings with excellent adhesion, gloss and distinctness of image (i.e., ability to reflect images in a clear, - 2 ~ 1 31 73qll well-defined ~anner), the resultant cured coatings do not have optimum humidity and mar resistance.
Summary of the Invention The present invention provides for a curable, liquid coating 5 composition containing an organic solvent and a resinous binder which comprises:
a) a polyepoxide, and b) a copolymer of an alpha-olefin or cycloolefin and an olefinically unsaturated monoanhydride which may include a partial ester thereof.
The coating composition has a resin solids content of at least 50 percent by weight.
The invention also provides a process for applying a color-clear composite coating to a substrate in which the crosslinkable 15 composition described above is in the clear coat. The invention further provides for the resultantly coated article.
Detailed Description The essential ingredients of the crosslinkable compositions of the present invention are the polyepoxide, the copolymer of an 20 alpha-olefin or cycloolefin and an olefinically unsaturated mono-anhydride which may include a partial ester thereof and preferably a polyacid.
Among the polyepoxides which can be used are epoxy contain-ing acrylic polymers which are preferred, epoxy condensation polymers 25 such as polyglycidyl ethers of alcohols and phenols and certain polyepoxide monomers and oligomers.
The epoxy-containing acrylic polymer is a copolymer of an ethylenically unsaturated monomer having at least one epoxy group and at least one polymerizable ethylenically unsaturated monomer which is 30 free of epoxy groups.
Examples of ethylenically unsaturated monomers containing epoxy groups are those containing l,2-epoxy groups and include glycidyl acrylate, glycidyl methacrylate and allyl glycidyl ether.
Examples of ethylenically unsaturated monomers which do not 35 contain epoxy groups are alkyl esters of acrylic and methacrylic acid containing from l to 20 atoms in the alkyl group. Specific examples ~ 3 ~ 1 3 1 7 3 q Ji of these acrylates and methacrylates are methyl methacrylate, ethyl methacrylate, butyl methacrylate, ethyl acrylate, butyl acrylate and 2-ethylhexyl acrylate.
~xamples of other copolymerizable ethylenically unsaturated 5 monomers are vinyl aromatic compounds such as styrene and vinyl toluene; nitriles such as acrylonitrile and methacrylonitrile; vinyl and vinylidene halides such as vinyl chloride and vinylidene fluoride and vinyl esters such as vinyl acetate. Acid group-containing copolymerizable ethylenically unsaturated monomers such as acrylic and 10 methacrylic acid are preferably not used because of the possible reactivity of the epoxy and acid group.
The epoxy group-containing ethylenically unsaturated monomer is preferably used in amounts of from about 5 to 60, more preferably from 20 to 50 percent by weight of the total monomers used in prepar-15 ing the epoxy-containing acrylic polymer. Of the remaining polymeriza-ble ethylenically unsaturated monomers, preferably from 40 to 95 per-cent, more preferably from 50 to 80 percent by weight of the total monomers are the alkyl esters of acrylic and methacrylic acid.
In preparing the epoxy-containing acrylic polymer, the 20 epoxide functional monomers and the other ethylenically unsaturated monomers can be mixed and reacted by conventional free radical initi-ated organic solution polymerization as generally described above.
The epoxy-containing acrylic polymer typically has a number average molecular weight between about 1000 and 20,000, preferably 25 1000 to 10,000, and more preferably 1000 to 5000. The molecular weight is determined by gel permeation chromatography using a poly-styrene standard. In determining molecular weights in this fashion, it is not the actual molecular weights which are measured but an indication of the molecular weight as compared to polystyrene. The 30 values which are obtained are commonly referred to as polystyrene numbers. However, for the purposes of this invention, they are referred to as molecular weights.
The epoxy condensation polymers which are used are polyepox-ides, that is, those having a 1,2-epoxy equivalency greater than 19 35 preferably greater than 1 and up to about 3Ø Examples of such epoxides are polyglycidyl ethers of polyhydric phenols and of ali-phatic alcohols. These polyepoxides can be produced by etherificationof the polyhydric phenol or aliphatic alcohol with an epihalohydrin such as epichlorohydrin in the prèsence of alkali.
Examples of suitable polyphenols are 2,2-bis(4-hydroxy-5 phenyl)propane (bisphenol A), 1,1-bis(4-hydroxyphenyl)ethane and 2-methyl-1,1-bis(4-hydroxyphenyl)propane. Examples of suitable aliphatic alcohols are ethylene glycol, diethylene glycol, 1,2-propylene glycol and 1,4-butylene glycol. Also, cycloaliphatic polyols such as 1,2-cyclohexanediol, 1,4-cyclohexanediol, 1,2-bis-lO (hydroxymethyl)cyclohexane and hydrogenated bisphenol A can also beused.
Besides the epoxy-containing polymers described above, certain polyepoxide monomers and oligomers can also be used. Examples of these materials are those containing the cyclohexane oxide moiety.
15 These polyepoxides are of relatively low molecular weight and of relatively high reactivity thus enabling the formation of high solids coating compositions with excellent cure response. The polyepoxides should have an average 1,2-epoxy equivalency of greater than one. The preferred polyepoxides are diepoxides, that is, having a 1,2-epoxy 20 equivalency of two.
Various polyepoxides containing the cyclohexane oxlde moiety are known. Particularly preferred in this regard is 3,4-epoxycyclo-hexylmethyl 3,4-epoxycyclohexane carboxylate. Also, the diepoxide bis(3,4-epoxy-6-methylcyclohexylmethyl) adipate can be used. These 25 epoxides are commercially available from Union Carbide Corporation as ERL 4221 and ERL 4299, respectively. Also, epoxies containing the cyclohexane moiety are described in U.S. Patents Nos. 2,890,194;
2,890,195; 2,890,196; 2,890,197; 2,890,210; 3,023,174 and 3,027,357.
Mixtures of polyepoxides, particularly mixtures of epoxy-30 containing acrylic polymers and polyepoxides containing a cyclohexane moiety, are preferred because they result in coating compositions which have high solids content and a good combination of coating properties~ i.e., gloss, distinctness of image, adhesion, hardness and solvent resistance.
The polyepoxide is typically present in the liquid crosslink-able composition in amounts of about 20 to 75, preferably from 30 to 60 percent by weight based on total weight of resin solids.
* Trade Mark 1~-~3~739 i The compositions of the present invention also contain a copolymer of an alpha-olefin or cycloolefin and an olefinically unsatu-rated monoanhydride which may include a partial ester thereof. The copolymer is typically present in the coating composition in amounts 5 of l to 40, preferably 5 to 30 percent by weight based on weight of resin solids. The copolymer provides for good mar resistance and humidity resistance in the resultant cured coating. Amounts greater than 40 percent by weight are less preferred because they adversely affect the hardness and Distinctness of Image (DOI) of the cured lO coating.
Among the alpha-olefins which may be used in the reaction with the olefinically unsaturated anhydride are those having from 4 to 14, preferably 4 to less than 10 carbon atoms. Alpha-olefins of less than 4 carbon atoms are undesirable because they are gaseous and 15 difficult to handle; whereas alpha-olefins of l0 or more carbon atoms are less preferred because of poor hardness and DOI. Examples of alpha-olefins are l-butene, l-hexene, l-octene, 2-methyl-l-heptene, 2,4,4-trimethyl-l-pentene, l-nonene, l-decene, l-dodecene, l-tridecene, l-tetradecene and vinyl cyclohexane, with l-octene being 20 preferred. Examples of cycloolefins include cyclohexene and cyclo-octene. Mixtures of alpha-olefins and cycloolefins can be used.
The olefinically unsaturated anhydr$de is of the structure:
R R
C= C/
O - C C = O
\o where R and Rl are the same or different and are selected from the class consisting of hydrogen, lower alkyl containing from l to 4 carbon atoms, lower alkoxy containing from l to 4 carbon atoms and 30 halo. Examples of suitable anhydrides include maleic anhydride which is preferred, itaconic anhydrlde, citraconic anhydride, chloromaleic anhydride, ethylmaleic anhydride and methoxymaleic anhydride.
Theoretically, one mole of the olefinically unsaturated anhy-dride is added to one mole of the alpha-olefin to obtain the desired 35 reaction product. However, in order to obtain an effective addition reaction, a molar excess of olefin is usually employed. The reaction - 6 ~ l 3 1 7 3 CJ ~t is carried out by heating the reactants together preferably in the presence of organic solvent and in the presence of a free radical initiator such as benzoyl peroxide, tert-amyl peroxyacetate or azo-type initiators at a temperature up to the reflux temperature of 5 the alpha-olefin, generally from about 30 to 220C., preferably from 80 to 180C., for a time sufficient to complete the polymerization;
typically from 0.5 to 10, preferably 1 to 5 hours.
To prepare preferred products, the time, temperature and catalyst are adjusted to prepare a product which has a weight average lO molecular weight of less than 15,000, more preferably 3000 to 12,000, as determined by gel permeation chromatography using a polystyrene standard. Molecular weights higher than 15,000 are not preferred because it is difficult to formulate coatings with high solids content.
Besides the anhydride copolymers, the partial ester deriva-tives formed by partially esterifying the copolymer with an alcohol can also be used and have been found to provide clear coats with less tendency to yellow. Among the alcohols which may be used include alkyl alcohols such as methanol and ethanol, arylalkyl alcohols such 20 as benzyl alcohol, ether alcohols such as 2-butoxyethanol, and tert-amino alcohols such as dimethylethanolamine. Usually, for each equivalent of anhydride functionality, up to one-half equivalent of alcohol is used. Esterification takes place by heating the anhydride copolymer and the alcohol together at reflux temperature for about 0.5 25 to 5 hours.
Preferably, the coating composition contains a polyacid containing two or more acid groups per molecule which are reactive with the polyepoxide. The polyacid provides for better DOI and hardness in the cured coatings. The acid functionality is preferably 30 carboxylic acid, although acids such as sulfonic acid may be used but their use is not preferred. Preferably, the polyacid curing agent is a carboxyl-terminated material having at least two carboxyl groups per molecule. Among the polyacid curing agents which may be used include carboxylic acid group-containing polymers such as acrylic polymers, 35 polyesters, and polyurethanes; oligomers such as ester group-containing oligomers and monomers.
7 1 31 739 r The preferred polyacid curing agents are ester group-containing oligomers. Examples include half-esters formed from reacting polyols and 1,2-acid anhydrides. The half-esters are pre-ferred because they are of relatively low molecular weight and are 5 quite reactive with epoxy functionality enabling the formulation of high solids compositions while maintaining outstanding properties such as hardness and distinctness of image. The preferred polyacid curing agents are of the structure:
X ~O - C - R - ll - OH)A
o o where X is the residue of the polyol after reaction with the 1,2-dicarboxylic acid anhydride, R is an organic moiety associated with the anhydride and A is equal to at least 2.
Among the anhydrides which can be used in the formation of 15 the desired polyesters are those which exclusive of the carbon atoms and the anhydride moiety contain from about 2 to 30 carbon atoms.
Examples include aliphatic, including cycloaliphatic, olefinic and cycloolefinic anhydrides and aromatic anhydrides. Substituted ali-phatic aromatic anhydrides are also included within the definition of 20 aliphatic and aromatic provided the substituents do not adversely affect the reactivity of the anhydride or the properties of the resultant polyester. Examples of substituents would be chloro, alkyl and alkoxy. Examples of anhydrides include succinic anhydride, methylsuccinic anhydride, dodecenyl succinic anhydride, octadecenyl-25 succinic anhydride, phthalic anhydride, tetrahydrophthalic anhydride,methyltetrahydrophthalic anhydride, hexahydrophthalic anhydride, alkyl hexahydrophthalic anhydrides such as methylhexahydrophthalic anhy-dride, tetrachlorophthalic anhydride, endomethylene tetrahydrophthalic anhydride, chlorendic anhydride, citraconic anhydride and maleic 30 anhydride.
Among the polyols which can be used are those which contain from about 2 to 20 carbon atoms. Preferred are diols, triols and mix-tures thereof. Examples include polyols containing from 2 to 10 carbon atoms. Examples include aliphatic polyols such as ethylene 35 glycol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentane-diol, glycerol, 1,2,3-butanetriol, 1,6-hexanediol, neopentyl glycol, - 8 - 131739'~
diethylene glycol, dipropylene glycol, 1,4-cyclohexanedimethanol, trimethylolpropane, 2,2,4-trimethylpentane-1,3-diol, pentaerythritol and 1,2,3,4,-butanetetrol. Aromatic polyols such as bisphenol A and bis(hydroxymethyl) xylene can also be used.
~hen the polyacid curing agent is used, it is typically present in the coating composition in amounts of about 5 to 75, preferably 5 to 50 percent by weight based on total weight of resin solids.
The equivalent ratio of the reactants present in the composi-10 tion are preferably adjusted that for each equivalent of epoxy there are 0.5 to 1.5, preferably 0.8 to 1.2 equivalents of carboxyl (anhydride being considered monofunctional).
The compositions will also preferably contain catalysts to accelerate the cure of the epoxy and carboxyl groups. ~xamples of 15 suitable catalysts are basic materials and include organic amines and quaternary ammonium compounds such as pyridine, piperidine, dimethyl-aniliDe, diethylenetriamine, tetramethylammonium chloride, tetramethyl-ammonium acetate, tetramethylbenzylammonium acetate, tetrabutyl-ammonium fluoride, and tetrabutylammonium bromide. The amount of 20 catalyst is typically from 0.1 to 10, preferably 0.5 to 3 percent by weight based on weight of resin solids.
Also, optional ingredients such as plasticizers, anti-oxidants, and W light absorbers can be included in the composition.
These ingredients typically are present in amounts of up to 25 percent 25 by weight based on total resin weight. For colored and/or textured coatings, pigments may be included in the compositions. Pigment contents in amounts of up to 75 percent by weight based on total solids can be used.
The compositions of the present invention are liquid composi-30 tions and are formulated into liquid high solids coating compositions,that is, those coating compositions containing greater than 40~
preferably greater than 55 percent by weight resin solids. The solids content is determined by formulating the coating composition to a No.
4 Ford cup viscosity of 25-30 seconds at 76F. (24C.) and heating the 35 composition to 105-110C. for 1 to 2 hours to drive off the volatile material.
- 9 - 1 3 1 739~-1 The curable compositions of the invention can be applied as coatings to a substrate by any of the conventional coating techniques such as brushing, spraying, dipping or flowing, but it is preferred that spray applications be used since this gives the best appearance.
5 Any of the known spray techniques may be employed such as compressed air spraying, airless spraying, electrostatic spraying and either manual or automatic methods.
After application of the coating composition to the sub-strate, the coated substrate is heated to cure the coating. In the lO curing operation, solvents are driven off and the film-forming material of the coating composition is crosslinked through reaction of the carboxyl groups and epoxy groups. The heating or curing operation is usually carried out at a temperature in the range of from 160-350F. (71-177C.). The thickness of the coating is usually from 15 about 0.1 to 5, preferably 0.1 to 3 mils.
Preferably, the compositions of the present invention, particularly those prepared with the aliphatic polyepoxides and with the epoxy-containing acrylic polymers, are used to formulate clear coats for use in a color-plus-clear application. In a color-plus-20 clear application, a composite coating is applied to a substrate. The process comprises applying to the substrate a pigmented or colored film-forming composition to form a base coat and applying to the base coat a second film-forming composition to form a transparent top coat over the base coat.
The film-forming composition of the base coat can be any of the compositions useful in coating applications, particularly automo-tive applications in which the color-plus-clear coating applications are finding their most use. A film-forming composition conventionally comprises a resinous binder and a pigment to act as a colorant.
30 Particularly useful resinous binders are acrylic polymers, polyesters including alkyds, and polyurethanes.
The resinous binder for the base coa~ can be an organic solvent-based material such as those described in U.S. Patent No.
4,220,679, note column 2, line 24, continuing through column 4, line 35 40. Also, water-based coating compositions such as those described in U.S. Patent No. 4,403,003 and U.S. Patent No. 4,147,679 can also be - 10 - 1 31 73q4 used as the binder in the base coat composition. The resinous binder for the base coat can also be the curable composition of the present invention.
The base coat composition also contains pigments including 5 metallic pigmentation to give it color. Examples of suitable pigmenta-tions for the base coat are described in the aforementioned U.S.
Patents Nos. 4,220,679; 4,403,003 and 4,147,679.
Optional ingredients in the base coat composition are those which are well known in the art of formulating surface coatings and 10 include surfactants, flow control agents, thixotropic agents, fillers, anti-gassing agents, organic co-solvents, catalysts and other custom-ary auxiliaries. Examples of these materials and suitable amounts are described in the aforementioned U.S. Patents Nos. 4,220,679; 4,403,003 and 4,147,679.
The base coat compositions can be applied to the substrate by any of the conventional coating techniques such as brushing, spraying, dipping or flowing, but they are most often applied by spraying. The usual spray techniques and equipment for air spraying, airless spraying and electrostatic spraying in either manual or 20 automatic methods can be used.
During application of the base coat to the substrate, a film of the base coat is formed on the substrate typically in a thickness of about ~.1 to 5 and preferably about 0.1 to 2 mils.
After forming a film of the base coat on the substrate, sol-25 vent, that is, organic solvent and/or water, is driven out of the basecoat film by heating or simply an air drying period before application of the clear coat. Preferably, the heating step will only be that sufficient and for a short period of time to insure that the clear top coat composition can be applied to the base coat without the former 30 dissolving the base coating composition, that is, "striking in".
Suitable drying conditions will depend on the particular base coat composition, on the ambient humidity with certain water-based composi-tions, but in general a drying time of from about 1 to 15 minutes at a temperature of about 70-175F. (21-79C.) will be adequate to insure 35 that mixing of the two coats is minimized. At the same time, the base coat film is adequately wetted by the clear top coat composition so -11- 13l739llt that satisfactory intercoat adhesion can be obtained. Also, more than one base coat and more than one top coat may be applied to develop optimum appearance. Usually between coats, the previously applied base coat or top coat is flashed, that is, exposed to ambient 5 conditions for about 1 to 20 minutes.
The clear top coat composition is applied to the base coat by any of the conventional coating techniques mentioned above, although spray applications are preferred. As mentioned above, the clear top coat is applied to the base coat via a wet-on-we~ technique 10 before the base coat has been cured. The two coatings are then heated to conjointly harden both coating layers. Curing conditions such as described above can be used. Clear coats typically have thicknesses of 0.5 to 5, usually 1 to 2.5 mils.
The invention will be further defined by reference to the 15 following examples. Unless otherwise indicated, all parts are by weight.
EXAMPLES
The following Examples A-G show the preparation of a polyepoxide, a polyacid and various alpha-olefin-maleic anhydride 20 copolymers which are useful in the practice of the present invention.
Example A
An epoxy-containing acrylic polymer was prepared from the following mixture of ingredients.
Ingredients ~eight (in grams) Solids (in grams) 25 Glycidyl methacrylate2080.0 40.0 Methyl methacrylate1716.0 33.0 Butyl acrylate 1300.0 25.0 Styrene 104.0 2.0 A VAZ0-67 260.0 5.0 (on monomers) 30 Tertiary-butyl perbenzoate 104.0 2.0 (on monomers) Tertiary-butyl perbenzoate (post addition) 26.0 0.5 (on monomers) Alpha, alpha'-dimethylazobis(isobutyronitrile) available from E. I. DuPont de Nemours and Company.
Xylene (2996.7 grams) was charged to a suitable reactor and heated to reflux to remove water through a Dean-Stark trap. The 131739~
glycidyl methacrylate, methyl methacrylate, butyl acrylate, and styrene were mixed together. The VAZ0-67, first portion of tertiary-butyl perbenzoate and 500.0 grams of xylene were also premixed together. The premixture of vinyl monomers and the premixture of 5 initiators were added simultaneously to the reaction vessel over a period of about three hours while maintaining the reaction temperature at reflux. At the completion of the addition, the reaction mixture was held at reflux for one hour followed by the addition of the second portion of tertiary-butyl perbenzoate and 100 grams of xylene. The 10 reaction mixture was held for two hours at reflux followed by cooling to room temperature. The reaction mixture had a solids content of about 58 percent and a number average molecular weight of about 1,300 as determined by gel permeation chromatography using a polystyrene standard.
Example B
A polyacid half-ester of 1-(3-hydroxy-2,2-dimethylpropyl)-3-hydroxy-2,2-dimethylpropionate (ESTER DIOL 204) and methylhexahydro-phthalic anhydride was prepared from the following mixture of ingredients:
Parts by Weight Ingredients (in grams) ESTER DIOL 204 2550.0 Methylhexahydrophthalic anhydride1 4116.0 Methyl isobutyl ketone 1466.5 Ethanol 666.6 MILLDRIDE*from Milliken Chemicals believed to be a mixture of methylhexahydrophthalic anhydride and hexahydrophthalic anhydride.
The ESTER DIOL 204 and 1466.5 grams of the methyl isobutyl ketone were charged to a reaction vessel and heated under a nitrogen 30 a~mosphere to 115C. The methylhexahydrophthalic anhydride was added over a 90-minute period. The reaction mixture was then held at 115~.
for four hours. The reaction mixture was then cooled to 100C.
followed by the addition of ethanol (to react with residual anhydride) and heating the reaction mixture to reflux and holding for two hours.
35 The reaction mixture was stripped to a pot temperature of 125C. The reaction mixture was then adjusted to 80 percent solids with methyl isobutyl ketone.
- ri * Trade ~ark , ~"
- 13 - 1 3 1 7 3 q 4 Example C
A l-decene-maleic anhydride copolymer was prepared as follows:
To a reaction vessel fitted with a condenser, thermometer, 5 nitrogen sparging inlet and agitator was charged 1123 grams (g.) (8 moles) of 1-decene. As the l-decene was heated at a reflux tempera-ture of 145C., a first mixture of 147.5 g. of tert-amyl peroxyaceta~e (available from Pennwalt Corporation as a 60 percent solids solution in mineral spirits as LUPERSOL 555-M60) and 80 g. of butyl acetate was 10 added over a period of three hours. Beginning a half hour after the start of the first addition, a second mixture of 393.2 g. (4 moles) of maleic anhydride, 401.2 g. of acetone and 246.9 g. of butyl acetate was added over a period of two hours. After completion of the addi-tions, heating was continued at 145-146C. for one hour. Thereafter, 15 solvent was removed by distillation with a total distillate of 290 g.
being removed. The reaction mixture was cooled to room temperature and thinned with butyl acetate to a solids content of 75.4 percent.
The copolymer had a number average molecular weight of about 1,697 and a weight average molecular weight of about 3,620.
Example D
A l-octene-maleic anhydride copolymer was prepared as follows:
To a reactlon vessel equipped as described in Example C was charged 1821.6 g. (16.23 moles) of l-octene. As the 1-octene was 25 heated at a reflux temperature of 120C., a first mixture of 458.9 g.
of benzoyl peroxide (available as 78 percent by weight aqueous mixture from Pennwalt Corporation as LUCIDOL 18) and 3781.8 g. of butyl acetate was added over a period of three hours. Beginning a half hour after the start of the first addition, a second mixture of 794.8 g.
30 (8.1 moles) of maleic anhydride and 1890.9 g. of butyl acetate was added over a period of two hours. After completion of the additions, heating at reflux was coutinued for one hour.-~Therè~fter, solvent was removed by distillation with a total distillate of 5457 g. removed.
The copolymer had a solids content of 75.9 percent, a number average 35 molecular weight of about 1061 and a weight average molecular weight of about 2731.
~ ~ ~ Trade Mark , ,: .
- 14 - 1 31 739~l Example E
A 1-hexene-maleic anhydride copolymer was prep~red as follows:
To a reaction vessel equipped as described in Example C was 5 charged 109 g. (1.3 moles) of 1-hexene. As the 1-hexene was heated to reflux, a first mixture of 36.7 g. of LUCIDOL 78 and 302.5 g. of butyl acetate was added over a period of 2~ hours. Beginning a half hour after the start of the first addition, a second mixture of 63.6 g.
(0.65 moles) of maleic anhydride and 151.3 g. of butyl acetate was 10 added over a period of 1~ hours. After completion of the additions, heating at reflux was continued for one hour. Thereafter, solvent was removed by distillation with a total distillate of 396.3 g. being removed. The copolymer had a solids content of 66 percent, a number average molecular weight of 1000 and a weight average molecular weight 15 of 4274.
Examp]e F
A 1-octene-maleic anhydride copolymer was prepared as follows:
To a reaction vessel equipped as described in Example C was 20 charged 3024 g. (27 moles) of 1-octene. As the 1-octene was heated to reflux temperature at 120~C., a first mixture of 182 g. of LUPERSOL
555-M60 and 825 g. of butyl acetate was added over a period of three hours. Beginning a half hour after the start of the first addition, a second mixture of 1323 g. (13.5 moles) of maleic anhydride and 3407 g.
25 of butyl acetate was added over a period of two hours. After comple-tion of the additions, heating at reflux was continued for one hour.
Thereafter, solvent was removed by distillation with a total distil-late of 5453 g. being removed. The remaining product had a solids content of 97 percent, number average molecular weight of 2217 and a 30 weight average molecular weight of 5906.
Example G
The benzyl alcohol half-ester of a 1-octene-maleic anhydride copolymer was prepared as follows:
To a reaction vessel equipped with a condenser, thermometer, 35 nitrogen sparging inlet and agitator was charged 1129.6 g. (3.9 moles) of the maleic anhydride-1-octene copolymer of Example D and 70.4 g. of 1 3 1 739L~
benzyl alcohol. The ingredients were heated to 105C. and held for one hour followed by cooling to room temperature.
The follo~ing Examples show the formulation of clear coats 5 using the polyepoxides, polyacid and alph~-olefin maleic anhydride copolymers of Examples A-G.
Example 1 The following Example shows the formulation of a clear coat containing no alpha-olefin-maleic anhydride copolymer. A base mix was 10 formulated from the following ingredients:
Parts by Weight Solids Ingredient (in grams) (in grams) TIN W IN 328 3.0 3.0 TINUVIN 292 1.0 1.0 Polybutylacrylate3 0.4 0.25 MULTIFLOW 4 0.5 0.25 ARMEEN DM-12D 4.0 4.0 25/75 hexyl acetate/
methyl isobutyl ketone 16.0 RESIMINE 717 16.4 13.8 Silica grind7 12.5 5.4 (4.4 resin, 1.0 pigment) Substituted benzotriazole W light stabilizer available from Ciba-Geigy Cosp.
Hindered amine W light stabilizer available from Ciba-Geigy.
Mw of about 10,000 and Mn of about 2400; 58.8 percent solids in xylene.
50 percent solution of poly(2-ethylhexylacrylate) in xylene 30 available from Monsanto Co.
5N,N-dimethyldodecylamine catalyst available from AKZO
Chemical.
Methylated melamine-formaldehyde condensate available fr~m Monsanto Co.; 84 percent solids in n-butanol.
8 percent fumed silica ground in 35 percent RESIMINE 717 solution and 57 percent ethanol.
* Trade Mark 1 31 739~
The ingredients were mixed in the order indicated with a low shear mixer to form the base mix.
The base mix was mixed with the following ingredients to form the coating composition.
Parts by Weight Solids Ingredients (in grams) (in grams) Base Mix 53.8 27.7 ERL 42991 19.6 lg.6 Epoxy-containing acrylic polymer of Example A 30.5 18.3 Polyacid of Example B 54.9 43.9 2S/75 hexyl acetate/
methyl isobutyl ketone 15.7 Cyclohexane oxide moiety containing polyepoxide from Union 15 Carbide Corp, The ingredients were mixed with a low shear mixer in the order indicated to form the coating composition which was then applied as a clear coat over both an aluminum metallic base coat and a black base coat which had been previously spray applied to a primed steel 20 panel. The base coat was given a 15-minute flash at room temperature followed by the application of the clear coat. The clear coat was given a 15-minute flash at room temperature followed ~y curi~g the composite coating for 30 minutes at 250F. (121C.). The properties of the coating composition and the cured coating are reported in the 25 Table below.
Example 2 The following Example shows the formulation of a coating composition with both the polyacid of Example B and the l-octene-maleic anhydride copolymer of Example D.
Parts by ~eight Solids Ingredients (in grams) (in grams) Base Mix of Example 153.8 27.7 ERL 4299 20.9 20.9 Epoxy-containing acrylic polymer of Example A32.3 19.4 Polyacid of Example B25.9 20.7 l-octene-maleic anhydride copolymer of Example D 27.4 20.8 10 25/75 hexyl acetatel methyl isobutyl ketone 14.2 The ingredients were mixed in the order indicated and applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported 15 in the Table below.
Example 3 The following Example shows the formulation of a coating composition wlth no polyacid and the l-octene-maleic anhydride copolymer of Example D.
Parts by Weight Solids Ingredients (in grams) (in ~rams) Base Mix of Example 153.8 27.7 ERL 4299 23.4 23.4 Epoxy-containing acrylic 25 polymer of Example A36.2 21.7 l-octene-maleic anhydride copolymer of Example D 48.4 36.7 25/75 hexyl acetate/
methyl isobutyl ketone 12.7 The ingredients were mixed in the order indicated and applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported in the Table below.
Example 4 The following Example shows the formulation of a coating composition with the benzyl alcohol half-ester of the l-octene-maleic anhydride copolymer of Example G.
Parts by Weight Solids Ingredients (in grams) (in grams) Base Mix of Example 1 53.8 27.7 ERL 4299 19.7 19.7 Epoxy-containing acrylic polymer of Example A 30.7 18.4 Polyacid of Example B 24.5 19.6 Copolymer of Example G 33.2 24.1 25/75 hexyl acetate/
methyl isobutyl ketone 12.7 The ingredients were mixed in the order indicated and applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported in the Table below.
Example 5 The following Example shows the formulation of a coating composition with the l-decene-maleic anhydride copolymer of Example C.
Parts by Weight Solids Ingredients (in grams) (in grams) Base Mix of Example 1 53.8 27.7 ERL 4299 19.4 19.4 Epoxy-containing acrylic polymer of Example A 30.0 18.0 Polyacid of Example B 24.0 19.2 l-decene-maleic anhydride copolymer of Example C 33.4 25.2 25/75 hexyl acetate/
methyl isobutyl ketone 13.9 The ingredients were mixed in the order indicated and 30 applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported in the Table below.
Example 6 The following Example shows the formulation of a coating 35 composition with the l-hexene-maleic anhydride copolymer of Example E.
- 19- 13173q~
Parts by Weight Solids In~redients (in grams) (in grams) Base Mix of Example 153.8 27.7 ERL 4299 21.6 21.6 Epoxy-containing acrylic polymer of Example A33.7 20.2 Polyacid of Example B26.8 21.4 l-hexene-maleic anhydride copolymer of Example E 29.1 18.6 10 25/75 hexyl acetate/
methyl isobutyl ketone 9.5 The ingredients were mixed in the order indicated and applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported 15 in the Table below.
Example 7 The following Example shows the formulation of a coating composition with the l-octene-maleic anhydride copolymer of Example F.
Parts by Weight Solids 20 Ingredients (in grams) (in grams) Base Mix of Example 153.8 27.7 ERL 4299 20.9 20.9 Epoxy-containing acrylic polymer of Example A32.3 19.4 25 Polyacid of Example B25.9 20.7 l-octene-maleic anhydr~de copolymer of Example F 41.6 20.8 25/75 hexyl acetate/
methyl isobutyl ketone 9.5 50 percent solids in methyl isobutyl ketone.
The ingredients were mixed in the order indicated and applied as a clear coat as described in Example l. The properties of the coating composition and the cured composite coatings are reported in the Table below.
` ~3~73q~
~`~o t t o a W W
n ~ 0 ~ r V W t~ .0 ~0 .t~
~EI '1 W ~ n ~ u tJ t~ 1 ~ ~ h ~ .1 ~
HIGH SOLIDS COATING COMPOSITIONS
CONTAINING A POLYEPOXIDE AND A COPOLYMER OF AN ALPHA-OLEFIN
AND AN OLEFINICALLY UNSATU~ATED MONO~NHYDRIDE
Background of the Invention Field of the Invention: The present invention is in the field of curable compositions and more particularly to curable coating compositions which are useful as clear coats in color-plus-clear coating applications. The lnvention also relates to a process for preparing color-plus-clear coated articles and to the coated articles themselves.
Brief Description of the Prior Art: Color-plus-clear coat-ings involve the application of a colored or pigmented base coat to a substrate followed by the application of a transparent or clear top coat to the base coat. The composite coatings are becoming increasing-ly popular as original finishes for automobiles. The color-plus-clear coatings have outstanding gloss and distinctness of image, and the clear coat is particularly importan~ fsr these properties. Two-pack clear coat compositions comprising polyols such as polyester polyols, polyurethane polyols and acrylic polyols and polyisocyanate curing agents give outstanding gloss and distinctness of image along with good humidity resistance and mar resistance. ~owever, the polyisocyanates are difficult to handle being sensitive to moisture and require cumbersome safety precautions because of their toxicity.
U.S. Patent No. 4,650~718 discloses crosslinkable coating compositions which avoid the problems of polyisocyanate curing agents. The crosslinkable coating compositions are based on poly-epoxides and polyacid curing agents. Although these compositions can be formulated to produce cured coatings with excellent adhesion, gloss and distinctness of image (i.e., ability to reflect images in a clear, - 2 ~ 1 31 73qll well-defined ~anner), the resultant cured coatings do not have optimum humidity and mar resistance.
Summary of the Invention The present invention provides for a curable, liquid coating 5 composition containing an organic solvent and a resinous binder which comprises:
a) a polyepoxide, and b) a copolymer of an alpha-olefin or cycloolefin and an olefinically unsaturated monoanhydride which may include a partial ester thereof.
The coating composition has a resin solids content of at least 50 percent by weight.
The invention also provides a process for applying a color-clear composite coating to a substrate in which the crosslinkable 15 composition described above is in the clear coat. The invention further provides for the resultantly coated article.
Detailed Description The essential ingredients of the crosslinkable compositions of the present invention are the polyepoxide, the copolymer of an 20 alpha-olefin or cycloolefin and an olefinically unsaturated mono-anhydride which may include a partial ester thereof and preferably a polyacid.
Among the polyepoxides which can be used are epoxy contain-ing acrylic polymers which are preferred, epoxy condensation polymers 25 such as polyglycidyl ethers of alcohols and phenols and certain polyepoxide monomers and oligomers.
The epoxy-containing acrylic polymer is a copolymer of an ethylenically unsaturated monomer having at least one epoxy group and at least one polymerizable ethylenically unsaturated monomer which is 30 free of epoxy groups.
Examples of ethylenically unsaturated monomers containing epoxy groups are those containing l,2-epoxy groups and include glycidyl acrylate, glycidyl methacrylate and allyl glycidyl ether.
Examples of ethylenically unsaturated monomers which do not 35 contain epoxy groups are alkyl esters of acrylic and methacrylic acid containing from l to 20 atoms in the alkyl group. Specific examples ~ 3 ~ 1 3 1 7 3 q Ji of these acrylates and methacrylates are methyl methacrylate, ethyl methacrylate, butyl methacrylate, ethyl acrylate, butyl acrylate and 2-ethylhexyl acrylate.
~xamples of other copolymerizable ethylenically unsaturated 5 monomers are vinyl aromatic compounds such as styrene and vinyl toluene; nitriles such as acrylonitrile and methacrylonitrile; vinyl and vinylidene halides such as vinyl chloride and vinylidene fluoride and vinyl esters such as vinyl acetate. Acid group-containing copolymerizable ethylenically unsaturated monomers such as acrylic and 10 methacrylic acid are preferably not used because of the possible reactivity of the epoxy and acid group.
The epoxy group-containing ethylenically unsaturated monomer is preferably used in amounts of from about 5 to 60, more preferably from 20 to 50 percent by weight of the total monomers used in prepar-15 ing the epoxy-containing acrylic polymer. Of the remaining polymeriza-ble ethylenically unsaturated monomers, preferably from 40 to 95 per-cent, more preferably from 50 to 80 percent by weight of the total monomers are the alkyl esters of acrylic and methacrylic acid.
In preparing the epoxy-containing acrylic polymer, the 20 epoxide functional monomers and the other ethylenically unsaturated monomers can be mixed and reacted by conventional free radical initi-ated organic solution polymerization as generally described above.
The epoxy-containing acrylic polymer typically has a number average molecular weight between about 1000 and 20,000, preferably 25 1000 to 10,000, and more preferably 1000 to 5000. The molecular weight is determined by gel permeation chromatography using a poly-styrene standard. In determining molecular weights in this fashion, it is not the actual molecular weights which are measured but an indication of the molecular weight as compared to polystyrene. The 30 values which are obtained are commonly referred to as polystyrene numbers. However, for the purposes of this invention, they are referred to as molecular weights.
The epoxy condensation polymers which are used are polyepox-ides, that is, those having a 1,2-epoxy equivalency greater than 19 35 preferably greater than 1 and up to about 3Ø Examples of such epoxides are polyglycidyl ethers of polyhydric phenols and of ali-phatic alcohols. These polyepoxides can be produced by etherificationof the polyhydric phenol or aliphatic alcohol with an epihalohydrin such as epichlorohydrin in the prèsence of alkali.
Examples of suitable polyphenols are 2,2-bis(4-hydroxy-5 phenyl)propane (bisphenol A), 1,1-bis(4-hydroxyphenyl)ethane and 2-methyl-1,1-bis(4-hydroxyphenyl)propane. Examples of suitable aliphatic alcohols are ethylene glycol, diethylene glycol, 1,2-propylene glycol and 1,4-butylene glycol. Also, cycloaliphatic polyols such as 1,2-cyclohexanediol, 1,4-cyclohexanediol, 1,2-bis-lO (hydroxymethyl)cyclohexane and hydrogenated bisphenol A can also beused.
Besides the epoxy-containing polymers described above, certain polyepoxide monomers and oligomers can also be used. Examples of these materials are those containing the cyclohexane oxide moiety.
15 These polyepoxides are of relatively low molecular weight and of relatively high reactivity thus enabling the formation of high solids coating compositions with excellent cure response. The polyepoxides should have an average 1,2-epoxy equivalency of greater than one. The preferred polyepoxides are diepoxides, that is, having a 1,2-epoxy 20 equivalency of two.
Various polyepoxides containing the cyclohexane oxlde moiety are known. Particularly preferred in this regard is 3,4-epoxycyclo-hexylmethyl 3,4-epoxycyclohexane carboxylate. Also, the diepoxide bis(3,4-epoxy-6-methylcyclohexylmethyl) adipate can be used. These 25 epoxides are commercially available from Union Carbide Corporation as ERL 4221 and ERL 4299, respectively. Also, epoxies containing the cyclohexane moiety are described in U.S. Patents Nos. 2,890,194;
2,890,195; 2,890,196; 2,890,197; 2,890,210; 3,023,174 and 3,027,357.
Mixtures of polyepoxides, particularly mixtures of epoxy-30 containing acrylic polymers and polyepoxides containing a cyclohexane moiety, are preferred because they result in coating compositions which have high solids content and a good combination of coating properties~ i.e., gloss, distinctness of image, adhesion, hardness and solvent resistance.
The polyepoxide is typically present in the liquid crosslink-able composition in amounts of about 20 to 75, preferably from 30 to 60 percent by weight based on total weight of resin solids.
* Trade Mark 1~-~3~739 i The compositions of the present invention also contain a copolymer of an alpha-olefin or cycloolefin and an olefinically unsatu-rated monoanhydride which may include a partial ester thereof. The copolymer is typically present in the coating composition in amounts 5 of l to 40, preferably 5 to 30 percent by weight based on weight of resin solids. The copolymer provides for good mar resistance and humidity resistance in the resultant cured coating. Amounts greater than 40 percent by weight are less preferred because they adversely affect the hardness and Distinctness of Image (DOI) of the cured lO coating.
Among the alpha-olefins which may be used in the reaction with the olefinically unsaturated anhydride are those having from 4 to 14, preferably 4 to less than 10 carbon atoms. Alpha-olefins of less than 4 carbon atoms are undesirable because they are gaseous and 15 difficult to handle; whereas alpha-olefins of l0 or more carbon atoms are less preferred because of poor hardness and DOI. Examples of alpha-olefins are l-butene, l-hexene, l-octene, 2-methyl-l-heptene, 2,4,4-trimethyl-l-pentene, l-nonene, l-decene, l-dodecene, l-tridecene, l-tetradecene and vinyl cyclohexane, with l-octene being 20 preferred. Examples of cycloolefins include cyclohexene and cyclo-octene. Mixtures of alpha-olefins and cycloolefins can be used.
The olefinically unsaturated anhydr$de is of the structure:
R R
C= C/
O - C C = O
\o where R and Rl are the same or different and are selected from the class consisting of hydrogen, lower alkyl containing from l to 4 carbon atoms, lower alkoxy containing from l to 4 carbon atoms and 30 halo. Examples of suitable anhydrides include maleic anhydride which is preferred, itaconic anhydrlde, citraconic anhydride, chloromaleic anhydride, ethylmaleic anhydride and methoxymaleic anhydride.
Theoretically, one mole of the olefinically unsaturated anhy-dride is added to one mole of the alpha-olefin to obtain the desired 35 reaction product. However, in order to obtain an effective addition reaction, a molar excess of olefin is usually employed. The reaction - 6 ~ l 3 1 7 3 CJ ~t is carried out by heating the reactants together preferably in the presence of organic solvent and in the presence of a free radical initiator such as benzoyl peroxide, tert-amyl peroxyacetate or azo-type initiators at a temperature up to the reflux temperature of 5 the alpha-olefin, generally from about 30 to 220C., preferably from 80 to 180C., for a time sufficient to complete the polymerization;
typically from 0.5 to 10, preferably 1 to 5 hours.
To prepare preferred products, the time, temperature and catalyst are adjusted to prepare a product which has a weight average lO molecular weight of less than 15,000, more preferably 3000 to 12,000, as determined by gel permeation chromatography using a polystyrene standard. Molecular weights higher than 15,000 are not preferred because it is difficult to formulate coatings with high solids content.
Besides the anhydride copolymers, the partial ester deriva-tives formed by partially esterifying the copolymer with an alcohol can also be used and have been found to provide clear coats with less tendency to yellow. Among the alcohols which may be used include alkyl alcohols such as methanol and ethanol, arylalkyl alcohols such 20 as benzyl alcohol, ether alcohols such as 2-butoxyethanol, and tert-amino alcohols such as dimethylethanolamine. Usually, for each equivalent of anhydride functionality, up to one-half equivalent of alcohol is used. Esterification takes place by heating the anhydride copolymer and the alcohol together at reflux temperature for about 0.5 25 to 5 hours.
Preferably, the coating composition contains a polyacid containing two or more acid groups per molecule which are reactive with the polyepoxide. The polyacid provides for better DOI and hardness in the cured coatings. The acid functionality is preferably 30 carboxylic acid, although acids such as sulfonic acid may be used but their use is not preferred. Preferably, the polyacid curing agent is a carboxyl-terminated material having at least two carboxyl groups per molecule. Among the polyacid curing agents which may be used include carboxylic acid group-containing polymers such as acrylic polymers, 35 polyesters, and polyurethanes; oligomers such as ester group-containing oligomers and monomers.
7 1 31 739 r The preferred polyacid curing agents are ester group-containing oligomers. Examples include half-esters formed from reacting polyols and 1,2-acid anhydrides. The half-esters are pre-ferred because they are of relatively low molecular weight and are 5 quite reactive with epoxy functionality enabling the formulation of high solids compositions while maintaining outstanding properties such as hardness and distinctness of image. The preferred polyacid curing agents are of the structure:
X ~O - C - R - ll - OH)A
o o where X is the residue of the polyol after reaction with the 1,2-dicarboxylic acid anhydride, R is an organic moiety associated with the anhydride and A is equal to at least 2.
Among the anhydrides which can be used in the formation of 15 the desired polyesters are those which exclusive of the carbon atoms and the anhydride moiety contain from about 2 to 30 carbon atoms.
Examples include aliphatic, including cycloaliphatic, olefinic and cycloolefinic anhydrides and aromatic anhydrides. Substituted ali-phatic aromatic anhydrides are also included within the definition of 20 aliphatic and aromatic provided the substituents do not adversely affect the reactivity of the anhydride or the properties of the resultant polyester. Examples of substituents would be chloro, alkyl and alkoxy. Examples of anhydrides include succinic anhydride, methylsuccinic anhydride, dodecenyl succinic anhydride, octadecenyl-25 succinic anhydride, phthalic anhydride, tetrahydrophthalic anhydride,methyltetrahydrophthalic anhydride, hexahydrophthalic anhydride, alkyl hexahydrophthalic anhydrides such as methylhexahydrophthalic anhy-dride, tetrachlorophthalic anhydride, endomethylene tetrahydrophthalic anhydride, chlorendic anhydride, citraconic anhydride and maleic 30 anhydride.
Among the polyols which can be used are those which contain from about 2 to 20 carbon atoms. Preferred are diols, triols and mix-tures thereof. Examples include polyols containing from 2 to 10 carbon atoms. Examples include aliphatic polyols such as ethylene 35 glycol, 1,2-propanediol, 1,3-propanediol, 1,4-butanediol, 1,5-pentane-diol, glycerol, 1,2,3-butanetriol, 1,6-hexanediol, neopentyl glycol, - 8 - 131739'~
diethylene glycol, dipropylene glycol, 1,4-cyclohexanedimethanol, trimethylolpropane, 2,2,4-trimethylpentane-1,3-diol, pentaerythritol and 1,2,3,4,-butanetetrol. Aromatic polyols such as bisphenol A and bis(hydroxymethyl) xylene can also be used.
~hen the polyacid curing agent is used, it is typically present in the coating composition in amounts of about 5 to 75, preferably 5 to 50 percent by weight based on total weight of resin solids.
The equivalent ratio of the reactants present in the composi-10 tion are preferably adjusted that for each equivalent of epoxy there are 0.5 to 1.5, preferably 0.8 to 1.2 equivalents of carboxyl (anhydride being considered monofunctional).
The compositions will also preferably contain catalysts to accelerate the cure of the epoxy and carboxyl groups. ~xamples of 15 suitable catalysts are basic materials and include organic amines and quaternary ammonium compounds such as pyridine, piperidine, dimethyl-aniliDe, diethylenetriamine, tetramethylammonium chloride, tetramethyl-ammonium acetate, tetramethylbenzylammonium acetate, tetrabutyl-ammonium fluoride, and tetrabutylammonium bromide. The amount of 20 catalyst is typically from 0.1 to 10, preferably 0.5 to 3 percent by weight based on weight of resin solids.
Also, optional ingredients such as plasticizers, anti-oxidants, and W light absorbers can be included in the composition.
These ingredients typically are present in amounts of up to 25 percent 25 by weight based on total resin weight. For colored and/or textured coatings, pigments may be included in the compositions. Pigment contents in amounts of up to 75 percent by weight based on total solids can be used.
The compositions of the present invention are liquid composi-30 tions and are formulated into liquid high solids coating compositions,that is, those coating compositions containing greater than 40~
preferably greater than 55 percent by weight resin solids. The solids content is determined by formulating the coating composition to a No.
4 Ford cup viscosity of 25-30 seconds at 76F. (24C.) and heating the 35 composition to 105-110C. for 1 to 2 hours to drive off the volatile material.
- 9 - 1 3 1 739~-1 The curable compositions of the invention can be applied as coatings to a substrate by any of the conventional coating techniques such as brushing, spraying, dipping or flowing, but it is preferred that spray applications be used since this gives the best appearance.
5 Any of the known spray techniques may be employed such as compressed air spraying, airless spraying, electrostatic spraying and either manual or automatic methods.
After application of the coating composition to the sub-strate, the coated substrate is heated to cure the coating. In the lO curing operation, solvents are driven off and the film-forming material of the coating composition is crosslinked through reaction of the carboxyl groups and epoxy groups. The heating or curing operation is usually carried out at a temperature in the range of from 160-350F. (71-177C.). The thickness of the coating is usually from 15 about 0.1 to 5, preferably 0.1 to 3 mils.
Preferably, the compositions of the present invention, particularly those prepared with the aliphatic polyepoxides and with the epoxy-containing acrylic polymers, are used to formulate clear coats for use in a color-plus-clear application. In a color-plus-20 clear application, a composite coating is applied to a substrate. The process comprises applying to the substrate a pigmented or colored film-forming composition to form a base coat and applying to the base coat a second film-forming composition to form a transparent top coat over the base coat.
The film-forming composition of the base coat can be any of the compositions useful in coating applications, particularly automo-tive applications in which the color-plus-clear coating applications are finding their most use. A film-forming composition conventionally comprises a resinous binder and a pigment to act as a colorant.
30 Particularly useful resinous binders are acrylic polymers, polyesters including alkyds, and polyurethanes.
The resinous binder for the base coa~ can be an organic solvent-based material such as those described in U.S. Patent No.
4,220,679, note column 2, line 24, continuing through column 4, line 35 40. Also, water-based coating compositions such as those described in U.S. Patent No. 4,403,003 and U.S. Patent No. 4,147,679 can also be - 10 - 1 31 73q4 used as the binder in the base coat composition. The resinous binder for the base coat can also be the curable composition of the present invention.
The base coat composition also contains pigments including 5 metallic pigmentation to give it color. Examples of suitable pigmenta-tions for the base coat are described in the aforementioned U.S.
Patents Nos. 4,220,679; 4,403,003 and 4,147,679.
Optional ingredients in the base coat composition are those which are well known in the art of formulating surface coatings and 10 include surfactants, flow control agents, thixotropic agents, fillers, anti-gassing agents, organic co-solvents, catalysts and other custom-ary auxiliaries. Examples of these materials and suitable amounts are described in the aforementioned U.S. Patents Nos. 4,220,679; 4,403,003 and 4,147,679.
The base coat compositions can be applied to the substrate by any of the conventional coating techniques such as brushing, spraying, dipping or flowing, but they are most often applied by spraying. The usual spray techniques and equipment for air spraying, airless spraying and electrostatic spraying in either manual or 20 automatic methods can be used.
During application of the base coat to the substrate, a film of the base coat is formed on the substrate typically in a thickness of about ~.1 to 5 and preferably about 0.1 to 2 mils.
After forming a film of the base coat on the substrate, sol-25 vent, that is, organic solvent and/or water, is driven out of the basecoat film by heating or simply an air drying period before application of the clear coat. Preferably, the heating step will only be that sufficient and for a short period of time to insure that the clear top coat composition can be applied to the base coat without the former 30 dissolving the base coating composition, that is, "striking in".
Suitable drying conditions will depend on the particular base coat composition, on the ambient humidity with certain water-based composi-tions, but in general a drying time of from about 1 to 15 minutes at a temperature of about 70-175F. (21-79C.) will be adequate to insure 35 that mixing of the two coats is minimized. At the same time, the base coat film is adequately wetted by the clear top coat composition so -11- 13l739llt that satisfactory intercoat adhesion can be obtained. Also, more than one base coat and more than one top coat may be applied to develop optimum appearance. Usually between coats, the previously applied base coat or top coat is flashed, that is, exposed to ambient 5 conditions for about 1 to 20 minutes.
The clear top coat composition is applied to the base coat by any of the conventional coating techniques mentioned above, although spray applications are preferred. As mentioned above, the clear top coat is applied to the base coat via a wet-on-we~ technique 10 before the base coat has been cured. The two coatings are then heated to conjointly harden both coating layers. Curing conditions such as described above can be used. Clear coats typically have thicknesses of 0.5 to 5, usually 1 to 2.5 mils.
The invention will be further defined by reference to the 15 following examples. Unless otherwise indicated, all parts are by weight.
EXAMPLES
The following Examples A-G show the preparation of a polyepoxide, a polyacid and various alpha-olefin-maleic anhydride 20 copolymers which are useful in the practice of the present invention.
Example A
An epoxy-containing acrylic polymer was prepared from the following mixture of ingredients.
Ingredients ~eight (in grams) Solids (in grams) 25 Glycidyl methacrylate2080.0 40.0 Methyl methacrylate1716.0 33.0 Butyl acrylate 1300.0 25.0 Styrene 104.0 2.0 A VAZ0-67 260.0 5.0 (on monomers) 30 Tertiary-butyl perbenzoate 104.0 2.0 (on monomers) Tertiary-butyl perbenzoate (post addition) 26.0 0.5 (on monomers) Alpha, alpha'-dimethylazobis(isobutyronitrile) available from E. I. DuPont de Nemours and Company.
Xylene (2996.7 grams) was charged to a suitable reactor and heated to reflux to remove water through a Dean-Stark trap. The 131739~
glycidyl methacrylate, methyl methacrylate, butyl acrylate, and styrene were mixed together. The VAZ0-67, first portion of tertiary-butyl perbenzoate and 500.0 grams of xylene were also premixed together. The premixture of vinyl monomers and the premixture of 5 initiators were added simultaneously to the reaction vessel over a period of about three hours while maintaining the reaction temperature at reflux. At the completion of the addition, the reaction mixture was held at reflux for one hour followed by the addition of the second portion of tertiary-butyl perbenzoate and 100 grams of xylene. The 10 reaction mixture was held for two hours at reflux followed by cooling to room temperature. The reaction mixture had a solids content of about 58 percent and a number average molecular weight of about 1,300 as determined by gel permeation chromatography using a polystyrene standard.
Example B
A polyacid half-ester of 1-(3-hydroxy-2,2-dimethylpropyl)-3-hydroxy-2,2-dimethylpropionate (ESTER DIOL 204) and methylhexahydro-phthalic anhydride was prepared from the following mixture of ingredients:
Parts by Weight Ingredients (in grams) ESTER DIOL 204 2550.0 Methylhexahydrophthalic anhydride1 4116.0 Methyl isobutyl ketone 1466.5 Ethanol 666.6 MILLDRIDE*from Milliken Chemicals believed to be a mixture of methylhexahydrophthalic anhydride and hexahydrophthalic anhydride.
The ESTER DIOL 204 and 1466.5 grams of the methyl isobutyl ketone were charged to a reaction vessel and heated under a nitrogen 30 a~mosphere to 115C. The methylhexahydrophthalic anhydride was added over a 90-minute period. The reaction mixture was then held at 115~.
for four hours. The reaction mixture was then cooled to 100C.
followed by the addition of ethanol (to react with residual anhydride) and heating the reaction mixture to reflux and holding for two hours.
35 The reaction mixture was stripped to a pot temperature of 125C. The reaction mixture was then adjusted to 80 percent solids with methyl isobutyl ketone.
- ri * Trade ~ark , ~"
- 13 - 1 3 1 7 3 q 4 Example C
A l-decene-maleic anhydride copolymer was prepared as follows:
To a reaction vessel fitted with a condenser, thermometer, 5 nitrogen sparging inlet and agitator was charged 1123 grams (g.) (8 moles) of 1-decene. As the l-decene was heated at a reflux tempera-ture of 145C., a first mixture of 147.5 g. of tert-amyl peroxyaceta~e (available from Pennwalt Corporation as a 60 percent solids solution in mineral spirits as LUPERSOL 555-M60) and 80 g. of butyl acetate was 10 added over a period of three hours. Beginning a half hour after the start of the first addition, a second mixture of 393.2 g. (4 moles) of maleic anhydride, 401.2 g. of acetone and 246.9 g. of butyl acetate was added over a period of two hours. After completion of the addi-tions, heating was continued at 145-146C. for one hour. Thereafter, 15 solvent was removed by distillation with a total distillate of 290 g.
being removed. The reaction mixture was cooled to room temperature and thinned with butyl acetate to a solids content of 75.4 percent.
The copolymer had a number average molecular weight of about 1,697 and a weight average molecular weight of about 3,620.
Example D
A l-octene-maleic anhydride copolymer was prepared as follows:
To a reactlon vessel equipped as described in Example C was charged 1821.6 g. (16.23 moles) of l-octene. As the 1-octene was 25 heated at a reflux temperature of 120C., a first mixture of 458.9 g.
of benzoyl peroxide (available as 78 percent by weight aqueous mixture from Pennwalt Corporation as LUCIDOL 18) and 3781.8 g. of butyl acetate was added over a period of three hours. Beginning a half hour after the start of the first addition, a second mixture of 794.8 g.
30 (8.1 moles) of maleic anhydride and 1890.9 g. of butyl acetate was added over a period of two hours. After completion of the additions, heating at reflux was coutinued for one hour.-~Therè~fter, solvent was removed by distillation with a total distillate of 5457 g. removed.
The copolymer had a solids content of 75.9 percent, a number average 35 molecular weight of about 1061 and a weight average molecular weight of about 2731.
~ ~ ~ Trade Mark , ,: .
- 14 - 1 31 739~l Example E
A 1-hexene-maleic anhydride copolymer was prep~red as follows:
To a reaction vessel equipped as described in Example C was 5 charged 109 g. (1.3 moles) of 1-hexene. As the 1-hexene was heated to reflux, a first mixture of 36.7 g. of LUCIDOL 78 and 302.5 g. of butyl acetate was added over a period of 2~ hours. Beginning a half hour after the start of the first addition, a second mixture of 63.6 g.
(0.65 moles) of maleic anhydride and 151.3 g. of butyl acetate was 10 added over a period of 1~ hours. After completion of the additions, heating at reflux was continued for one hour. Thereafter, solvent was removed by distillation with a total distillate of 396.3 g. being removed. The copolymer had a solids content of 66 percent, a number average molecular weight of 1000 and a weight average molecular weight 15 of 4274.
Examp]e F
A 1-octene-maleic anhydride copolymer was prepared as follows:
To a reaction vessel equipped as described in Example C was 20 charged 3024 g. (27 moles) of 1-octene. As the 1-octene was heated to reflux temperature at 120~C., a first mixture of 182 g. of LUPERSOL
555-M60 and 825 g. of butyl acetate was added over a period of three hours. Beginning a half hour after the start of the first addition, a second mixture of 1323 g. (13.5 moles) of maleic anhydride and 3407 g.
25 of butyl acetate was added over a period of two hours. After comple-tion of the additions, heating at reflux was continued for one hour.
Thereafter, solvent was removed by distillation with a total distil-late of 5453 g. being removed. The remaining product had a solids content of 97 percent, number average molecular weight of 2217 and a 30 weight average molecular weight of 5906.
Example G
The benzyl alcohol half-ester of a 1-octene-maleic anhydride copolymer was prepared as follows:
To a reaction vessel equipped with a condenser, thermometer, 35 nitrogen sparging inlet and agitator was charged 1129.6 g. (3.9 moles) of the maleic anhydride-1-octene copolymer of Example D and 70.4 g. of 1 3 1 739L~
benzyl alcohol. The ingredients were heated to 105C. and held for one hour followed by cooling to room temperature.
The follo~ing Examples show the formulation of clear coats 5 using the polyepoxides, polyacid and alph~-olefin maleic anhydride copolymers of Examples A-G.
Example 1 The following Example shows the formulation of a clear coat containing no alpha-olefin-maleic anhydride copolymer. A base mix was 10 formulated from the following ingredients:
Parts by Weight Solids Ingredient (in grams) (in grams) TIN W IN 328 3.0 3.0 TINUVIN 292 1.0 1.0 Polybutylacrylate3 0.4 0.25 MULTIFLOW 4 0.5 0.25 ARMEEN DM-12D 4.0 4.0 25/75 hexyl acetate/
methyl isobutyl ketone 16.0 RESIMINE 717 16.4 13.8 Silica grind7 12.5 5.4 (4.4 resin, 1.0 pigment) Substituted benzotriazole W light stabilizer available from Ciba-Geigy Cosp.
Hindered amine W light stabilizer available from Ciba-Geigy.
Mw of about 10,000 and Mn of about 2400; 58.8 percent solids in xylene.
50 percent solution of poly(2-ethylhexylacrylate) in xylene 30 available from Monsanto Co.
5N,N-dimethyldodecylamine catalyst available from AKZO
Chemical.
Methylated melamine-formaldehyde condensate available fr~m Monsanto Co.; 84 percent solids in n-butanol.
8 percent fumed silica ground in 35 percent RESIMINE 717 solution and 57 percent ethanol.
* Trade Mark 1 31 739~
The ingredients were mixed in the order indicated with a low shear mixer to form the base mix.
The base mix was mixed with the following ingredients to form the coating composition.
Parts by Weight Solids Ingredients (in grams) (in grams) Base Mix 53.8 27.7 ERL 42991 19.6 lg.6 Epoxy-containing acrylic polymer of Example A 30.5 18.3 Polyacid of Example B 54.9 43.9 2S/75 hexyl acetate/
methyl isobutyl ketone 15.7 Cyclohexane oxide moiety containing polyepoxide from Union 15 Carbide Corp, The ingredients were mixed with a low shear mixer in the order indicated to form the coating composition which was then applied as a clear coat over both an aluminum metallic base coat and a black base coat which had been previously spray applied to a primed steel 20 panel. The base coat was given a 15-minute flash at room temperature followed by the application of the clear coat. The clear coat was given a 15-minute flash at room temperature followed ~y curi~g the composite coating for 30 minutes at 250F. (121C.). The properties of the coating composition and the cured coating are reported in the 25 Table below.
Example 2 The following Example shows the formulation of a coating composition with both the polyacid of Example B and the l-octene-maleic anhydride copolymer of Example D.
Parts by ~eight Solids Ingredients (in grams) (in grams) Base Mix of Example 153.8 27.7 ERL 4299 20.9 20.9 Epoxy-containing acrylic polymer of Example A32.3 19.4 Polyacid of Example B25.9 20.7 l-octene-maleic anhydride copolymer of Example D 27.4 20.8 10 25/75 hexyl acetatel methyl isobutyl ketone 14.2 The ingredients were mixed in the order indicated and applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported 15 in the Table below.
Example 3 The following Example shows the formulation of a coating composition wlth no polyacid and the l-octene-maleic anhydride copolymer of Example D.
Parts by Weight Solids Ingredients (in grams) (in ~rams) Base Mix of Example 153.8 27.7 ERL 4299 23.4 23.4 Epoxy-containing acrylic 25 polymer of Example A36.2 21.7 l-octene-maleic anhydride copolymer of Example D 48.4 36.7 25/75 hexyl acetate/
methyl isobutyl ketone 12.7 The ingredients were mixed in the order indicated and applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported in the Table below.
Example 4 The following Example shows the formulation of a coating composition with the benzyl alcohol half-ester of the l-octene-maleic anhydride copolymer of Example G.
Parts by Weight Solids Ingredients (in grams) (in grams) Base Mix of Example 1 53.8 27.7 ERL 4299 19.7 19.7 Epoxy-containing acrylic polymer of Example A 30.7 18.4 Polyacid of Example B 24.5 19.6 Copolymer of Example G 33.2 24.1 25/75 hexyl acetate/
methyl isobutyl ketone 12.7 The ingredients were mixed in the order indicated and applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported in the Table below.
Example 5 The following Example shows the formulation of a coating composition with the l-decene-maleic anhydride copolymer of Example C.
Parts by Weight Solids Ingredients (in grams) (in grams) Base Mix of Example 1 53.8 27.7 ERL 4299 19.4 19.4 Epoxy-containing acrylic polymer of Example A 30.0 18.0 Polyacid of Example B 24.0 19.2 l-decene-maleic anhydride copolymer of Example C 33.4 25.2 25/75 hexyl acetate/
methyl isobutyl ketone 13.9 The ingredients were mixed in the order indicated and 30 applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported in the Table below.
Example 6 The following Example shows the formulation of a coating 35 composition with the l-hexene-maleic anhydride copolymer of Example E.
- 19- 13173q~
Parts by Weight Solids In~redients (in grams) (in grams) Base Mix of Example 153.8 27.7 ERL 4299 21.6 21.6 Epoxy-containing acrylic polymer of Example A33.7 20.2 Polyacid of Example B26.8 21.4 l-hexene-maleic anhydride copolymer of Example E 29.1 18.6 10 25/75 hexyl acetate/
methyl isobutyl ketone 9.5 The ingredients were mixed in the order indicated and applied as a clear coat as described in Example 1. The properties of the coating composition and the cured composite coatings are reported 15 in the Table below.
Example 7 The following Example shows the formulation of a coating composition with the l-octene-maleic anhydride copolymer of Example F.
Parts by Weight Solids 20 Ingredients (in grams) (in grams) Base Mix of Example 153.8 27.7 ERL 4299 20.9 20.9 Epoxy-containing acrylic polymer of Example A32.3 19.4 25 Polyacid of Example B25.9 20.7 l-octene-maleic anhydr~de copolymer of Example F 41.6 20.8 25/75 hexyl acetate/
methyl isobutyl ketone 9.5 50 percent solids in methyl isobutyl ketone.
The ingredients were mixed in the order indicated and applied as a clear coat as described in Example l. The properties of the coating composition and the cured composite coatings are reported in the Table below.
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O ~" Cl n ¦ "~ ~r tJ~ o to t~ _ E u ~n r~l ~0 C 1~ co a 0~ ~nl "~ O ~ CO ~ tD c~
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` - 21 - 1 31 739~
Measured with a 20 degree gloss meter manufactured by Hunter Lab.
Distinctness of Image (DOI) determined on a C-Box manufactured by C-Box I2R Co.
3Crosshatch adhesion determined generally in accordance with the procedures of ~STM 3359. The adhesion was rated 0-5 with 5 indicating excellent adhesion.
Tukon hardness number determined by ASTM E-48. Pencil hardness determined by taking series of standard pencils of varying 10 hardness with H being the hardest and B being the softest and scratching the panels with pencils of increasing hardness until the coating was etched away.
5Two (2) drops of xylene are placed on the panel for 3 minutes. The pencil hardness of the spot in contact with the xylene 15 is then determined. ~ow much the coating softens compared to the original pencil hardness ls a measure of the xylene resistance.
Humidity resistance determined by using the coated panel as the ceiling of a humidity chamber (QCT chamber) with the coating directed inwardly towards the chamber. The chamber is heated to 20 140F. (60C.) and about a 2-inch (3 cm) level of water is located 3 to 5 inches below the coated panel (panel sloped). After being exposed for 24 hours, the appearance and 20 gloss of the exposed coating was determined and compared with the original appearance and gloss before testing.
7Coating scratched with a fingernail. Ratings are poor for heavy marking of the coating; fair for slight marking of the coating and good for no marking.
Mar resistance determined over black coatings and other properties determined over the silver coating.
l ~
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1~ X l';
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~n -~l to~o~ o U~ ~
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` - 21 - 1 31 739~
Measured with a 20 degree gloss meter manufactured by Hunter Lab.
Distinctness of Image (DOI) determined on a C-Box manufactured by C-Box I2R Co.
3Crosshatch adhesion determined generally in accordance with the procedures of ~STM 3359. The adhesion was rated 0-5 with 5 indicating excellent adhesion.
Tukon hardness number determined by ASTM E-48. Pencil hardness determined by taking series of standard pencils of varying 10 hardness with H being the hardest and B being the softest and scratching the panels with pencils of increasing hardness until the coating was etched away.
5Two (2) drops of xylene are placed on the panel for 3 minutes. The pencil hardness of the spot in contact with the xylene 15 is then determined. ~ow much the coating softens compared to the original pencil hardness ls a measure of the xylene resistance.
Humidity resistance determined by using the coated panel as the ceiling of a humidity chamber (QCT chamber) with the coating directed inwardly towards the chamber. The chamber is heated to 20 140F. (60C.) and about a 2-inch (3 cm) level of water is located 3 to 5 inches below the coated panel (panel sloped). After being exposed for 24 hours, the appearance and 20 gloss of the exposed coating was determined and compared with the original appearance and gloss before testing.
7Coating scratched with a fingernail. Ratings are poor for heavy marking of the coating; fair for slight marking of the coating and good for no marking.
Mar resistance determined over black coatings and other properties determined over the silver coating.
Claims (17)
1. A curable, liquid coating composition containing organic solvent and a resinous binder, said resinous binder comprising:
(a) a polyepoxide, (b) a copolymer of an alpha-olefin or a cycloolefin and an olefinically unsaturated monoanhydride including a partial ester thereof; and (c) a carboxy-terminated polyester polyacid curing agent containing at least two carboxyl groups per molecule;
said coating composition having a resin solids content of at least 40 percent by weight.
(a) a polyepoxide, (b) a copolymer of an alpha-olefin or a cycloolefin and an olefinically unsaturated monoanhydride including a partial ester thereof; and (c) a carboxy-terminated polyester polyacid curing agent containing at least two carboxyl groups per molecule;
said coating composition having a resin solids content of at least 40 percent by weight.
2. The composition of Claim 1 in which the polyepoxide is a copolymer of a monoethylenically unsaturated monomer having at least one epoxy group and at least one monoethylenically unsaturated monomer which is free of epoxy groups.
3. The composition of Claim 1 in which the polyepoxide is a cyclohexane oxide moiety containing polyepoxide.
4. The composition of Claim 1 in which the carboxyl-terminated polyester is a half-ester of the structure:
where X is the residue of a polyol after reaction with a 1,2-dicar-boxylic acid anhydride, R is an organic moiety associated with the anhydride, and A is equal to at least 2.
where X is the residue of a polyol after reaction with a 1,2-dicar-boxylic acid anhydride, R is an organic moiety associated with the anhydride, and A is equal to at least 2.
5. The composition of Claim 1 in which the olefinically unsaturated monoanhydride is maleic anhydride.
6. The composition of Claim 1 in which the alpha-olefin contains from 4 to less that 10 carbon atoms.
7. The composition of Claim 6 in which the alpha-olefin is selected from the class consisting of 1-hexene and 1-octene.
8. The composition of Claim 1 in which the copolymer (b) has a weight average molecular weight of less than 15,000.
9. The composition of Claim 1 in which the polyepoxide is present in the crosslinkable composition in amounts of about 20 to 75 percent by weight based on weight of resin solids.
10. The composition of Claim 1 in which the polyacid curing agent is present in the composition in amounts of about 5 to 50 percent by weight based on weight of resin solids.
11. The composition of Claim 1 in which the copolymer (b) is present in the composition in amounts of about 5 to 40 percent by weight based on weight of resin solids.
12. The composition of Claim 1 in which the equivalent ratio of carboxyl to epoxy is from 0.8 to 1.2 to 1 and is sufficient to form a cured product.
13. The composition of Claim 1 which has a resin solids content of at least 55 percent by weight.
14. A process for applying a composite coating to a substrate which comprises applying to the substrate a colored film-forming composition to form a base coat and applying to said base coat a clear film-forming composition to form a transparent top coat over the base coat characterized in that the clear film-forming compo-sition comprises the curable liquid coating composition of Claim 1.
15. A process for applying a composite coating to a substrate which comprises applying to the substrate a colored film-forming composition to form a base coat and applying to said base coat a clear film-forming composition to form a transparent top coat over the base coat characterized in that the clear film-forming compo-sition comprises the curable liquid coating composition of Claim 4.
16. A substrate coated in accordance with the process of Claim 14.
17. A substrate coated in accordance with the process of Claim 15.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/087,012 US4927868A (en) | 1987-08-19 | 1987-08-19 | High solids coating compositions containing a polyepoxide and a copolymer of an alpha-olefin and an olefinically unsaturated monoanhydride |
US87,012 | 1987-08-19 |
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Publication Number | Publication Date |
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CA1317394C true CA1317394C (en) | 1993-05-04 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CA000571895A Expired - Fee Related CA1317394C (en) | 1987-08-19 | 1988-07-13 | High solids coating compositions containing a polyepoxide and a copolymer of an alpha-olefin and an olefinically unsaturated monoanhydride |
Country Status (10)
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US (1) | US4927868A (en) |
EP (1) | EP0305078B1 (en) |
JP (1) | JPH0692562B2 (en) |
KR (1) | KR950012767B1 (en) |
AU (1) | AU588740B2 (en) |
CA (1) | CA1317394C (en) |
DE (1) | DE3876173T2 (en) |
ES (1) | ES2052729T3 (en) |
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ZA (1) | ZA884591B (en) |
Families Citing this family (61)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01118574A (en) * | 1987-06-10 | 1989-05-11 | Union Carbide Corp | High solid dripping resistant alicylic epoxy coating containing low molecular weight and high tg organic polymer dripping resistant additive |
US4798746A (en) * | 1987-08-24 | 1989-01-17 | Ppg Industries, Inc. | Basecoat/clearcoat method of coating utilizing an anhydride additive in the thermoplastic polymer-containing basecoat for improved repairability |
CA1340155C (en) * | 1987-11-13 | 1998-12-01 | Ppg Industries, Inc. | Coating composition based on polyepoxides and urethane-containing polyacid curing agents |
US5411809A (en) * | 1987-11-16 | 1995-05-02 | The Sherwin-Williams Company | Reactive coatings comprising an acid-functional compound, an anhydride-functional compound and an epoxy-functional compound |
KR950704396A (en) * | 1992-11-12 | 1995-11-20 | 스티븐 에스. 그레이스 | Curable composition containing anhydride resins |
US5270362A (en) * | 1992-12-29 | 1993-12-14 | E. I. Du Pont De Nemours And Company | Refinish clear coating of acrylic anhydride polymer, a glycidyl component and low molecular weight hydroxy polyester |
US5384367A (en) * | 1993-04-19 | 1995-01-24 | Ppg Industries, Inc. | Carbamate urea or urethane-functional epoxy acrylic with polyacid |
US5633091A (en) * | 1994-01-03 | 1997-05-27 | The Sherwin-Williams Company | Graft copolymers having anhydride functionality |
US5418307A (en) * | 1994-01-03 | 1995-05-23 | The Sherwin-Williams Company | Hydrogenated polymers having acid functionality |
US5364945A (en) * | 1994-01-03 | 1994-11-15 | The Sherwin-Williams Company | Anhydride-functional monomers and polymers and reactive compositions prepared from same |
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-
1987
- 1987-08-19 US US07/087,012 patent/US4927868A/en not_active Expired - Lifetime
-
1988
- 1988-06-27 ZA ZA884591A patent/ZA884591B/en unknown
- 1988-06-28 MX MX012079A patent/MX166931B/en unknown
- 1988-07-13 CA CA000571895A patent/CA1317394C/en not_active Expired - Fee Related
- 1988-08-09 KR KR1019880010141A patent/KR950012767B1/en not_active IP Right Cessation
- 1988-08-09 DE DE8888307350T patent/DE3876173T2/en not_active Expired - Fee Related
- 1988-08-09 EP EP88307350A patent/EP0305078B1/en not_active Expired - Lifetime
- 1988-08-09 ES ES88307350T patent/ES2052729T3/en not_active Expired - Lifetime
- 1988-08-12 JP JP63202610A patent/JPH0692562B2/en not_active Expired - Fee Related
- 1988-08-12 AU AU20669/88A patent/AU588740B2/en not_active Ceased
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DE3876173D1 (en) | 1993-01-07 |
EP0305078B1 (en) | 1992-11-25 |
US4927868A (en) | 1990-05-22 |
AU588740B2 (en) | 1989-09-21 |
ES2052729T3 (en) | 1994-07-16 |
EP0305078A2 (en) | 1989-03-01 |
KR950012767B1 (en) | 1995-10-21 |
DE3876173T2 (en) | 1993-04-15 |
AU2066988A (en) | 1989-05-11 |
ZA884591B (en) | 1990-02-28 |
EP0305078A3 (en) | 1990-05-16 |
KR890003874A (en) | 1989-04-18 |
MX166931B (en) | 1993-02-15 |
JPS6469670A (en) | 1989-03-15 |
JPH0692562B2 (en) | 1994-11-16 |
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