WO2022270687A1 - Clear coat composition - Google Patents
Clear coat composition Download PDFInfo
- Publication number
- WO2022270687A1 WO2022270687A1 PCT/KR2021/014288 KR2021014288W WO2022270687A1 WO 2022270687 A1 WO2022270687 A1 WO 2022270687A1 KR 2021014288 W KR2021014288 W KR 2021014288W WO 2022270687 A1 WO2022270687 A1 WO 2022270687A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- silane
- weight
- coating film
- clear coat
- Prior art date
Links
- 239000000203 mixture Substances 0.000 title claims abstract description 104
- 229920005989 resin Polymers 0.000 claims abstract description 94
- 239000011347 resin Substances 0.000 claims abstract description 94
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 61
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 61
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 46
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 46
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims abstract description 46
- 229910000077 silane Inorganic materials 0.000 claims abstract description 46
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 37
- 229920001225 polyester resin Polymers 0.000 claims abstract description 37
- 239000004645 polyester resin Substances 0.000 claims abstract description 37
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 32
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000004640 Melamine resin Substances 0.000 claims abstract description 29
- 239000002904 solvent Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 22
- 230000009477 glass transition Effects 0.000 claims description 20
- RQAGEUFKLGHJPA-UHFFFAOYSA-N prop-2-enoylsilicon Chemical compound [Si]C(=O)C=C RQAGEUFKLGHJPA-UHFFFAOYSA-N 0.000 claims description 14
- 229920005862 polyol Polymers 0.000 claims description 7
- 150000003077 polyols Chemical class 0.000 claims description 7
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 2
- 238000000576 coating method Methods 0.000 description 114
- 239000011248 coating agent Substances 0.000 description 113
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 64
- 239000000178 monomer Substances 0.000 description 49
- 229920000728 polyester Polymers 0.000 description 36
- 238000004132 cross linking Methods 0.000 description 23
- 239000007787 solid Substances 0.000 description 19
- -1 phenylene vinyl ketone Chemical compound 0.000 description 18
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 17
- 239000012948 isocyanate Substances 0.000 description 15
- 150000002513 isocyanates Chemical class 0.000 description 15
- 230000000694 effects Effects 0.000 description 12
- 230000000704 physical effect Effects 0.000 description 12
- 239000002253 acid Substances 0.000 description 11
- 230000007423 decrease Effects 0.000 description 10
- 230000006866 deterioration Effects 0.000 description 10
- 238000001035 drying Methods 0.000 description 10
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 9
- 125000003545 alkoxy group Chemical group 0.000 description 9
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 9
- 238000006243 chemical reaction Methods 0.000 description 8
- 230000014759 maintenance of location Effects 0.000 description 8
- 229920002554 vinyl polymer Polymers 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 238000010422 painting Methods 0.000 description 7
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 6
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 6
- 239000004611 light stabiliser Substances 0.000 description 6
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 6
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 5
- 230000002950 deficient Effects 0.000 description 5
- BHXIWUJLHYHGSJ-UHFFFAOYSA-N ethyl 3-ethoxypropanoate Chemical compound CCOCCC(=O)OCC BHXIWUJLHYHGSJ-UHFFFAOYSA-N 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 5
- 230000009257 reactivity Effects 0.000 description 5
- 239000008096 xylene Substances 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 4
- 239000013638 trimer Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- YHFGMFYKZBWPRW-UHFFFAOYSA-N 3-methylpentane-1,1-diol Chemical compound CCC(C)CC(O)O YHFGMFYKZBWPRW-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- 239000005058 Isophorone diisocyanate Substances 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000001361 adipic acid Substances 0.000 description 3
- 235000011037 adipic acid Nutrition 0.000 description 3
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 125000005442 diisocyanate group Chemical group 0.000 description 3
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002987 primer (paints) Substances 0.000 description 3
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 3
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical group C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 2
- NMRPBPVERJPACX-UHFFFAOYSA-N (3S)-octan-3-ol Natural products CCCCCC(O)CC NMRPBPVERJPACX-UHFFFAOYSA-N 0.000 description 2
- 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
- ZTNJGMFHJYGMDR-UHFFFAOYSA-N 1,2-diisocyanatoethane Chemical compound O=C=NCCN=C=O ZTNJGMFHJYGMDR-UHFFFAOYSA-N 0.000 description 2
- ZGDSDWSIFQBAJS-UHFFFAOYSA-N 1,2-diisocyanatopropane Chemical compound O=C=NC(C)CN=C=O ZGDSDWSIFQBAJS-UHFFFAOYSA-N 0.000 description 2
- VGHSXKTVMPXHNG-UHFFFAOYSA-N 1,3-diisocyanatobenzene Chemical compound O=C=NC1=CC=CC(N=C=O)=C1 VGHSXKTVMPXHNG-UHFFFAOYSA-N 0.000 description 2
- UFXYYTWJETZVHG-UHFFFAOYSA-N 1,3-diisocyanatobutane Chemical compound O=C=NC(C)CCN=C=O UFXYYTWJETZVHG-UHFFFAOYSA-N 0.000 description 2
- IKYNWXNXXHWHLL-UHFFFAOYSA-N 1,3-diisocyanatopropane Chemical compound O=C=NCCCN=C=O IKYNWXNXXHWHLL-UHFFFAOYSA-N 0.000 description 2
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 2
- OVBFMUAFNIIQAL-UHFFFAOYSA-N 1,4-diisocyanatobutane Chemical compound O=C=NCCCCN=C=O OVBFMUAFNIIQAL-UHFFFAOYSA-N 0.000 description 2
- DFPJRUKWEPYFJT-UHFFFAOYSA-N 1,5-diisocyanatopentane Chemical compound O=C=NCCCCCN=C=O DFPJRUKWEPYFJT-UHFFFAOYSA-N 0.000 description 2
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 2
- GNDLGOZYDSQVAK-UHFFFAOYSA-N 2,7-diisocyanato-2,7-dimethyloctane Chemical compound O=C=NC(C)(C)CCCCC(C)(C)N=C=O GNDLGOZYDSQVAK-UHFFFAOYSA-N 0.000 description 2
- FZHNODDFDJBMAS-UHFFFAOYSA-N 2-ethoxyethenylbenzene Chemical compound CCOC=CC1=CC=CC=C1 FZHNODDFDJBMAS-UHFFFAOYSA-N 0.000 description 2
- YIWUKEYIRIRTPP-UHFFFAOYSA-N 2-ethylhexan-1-ol Chemical compound CCCCC(CC)CO YIWUKEYIRIRTPP-UHFFFAOYSA-N 0.000 description 2
- KBKNKFIRGXQLDB-UHFFFAOYSA-N 2-fluoroethenylbenzene Chemical compound FC=CC1=CC=CC=C1 KBKNKFIRGXQLDB-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- CTHJQRHPNQEPAB-UHFFFAOYSA-N 2-methoxyethenylbenzene Chemical compound COC=CC1=CC=CC=C1 CTHJQRHPNQEPAB-UHFFFAOYSA-N 0.000 description 2
- BTOVVHWKPVSLBI-UHFFFAOYSA-N 2-methylprop-1-enylbenzene Chemical compound CC(C)=CC1=CC=CC=C1 BTOVVHWKPVSLBI-UHFFFAOYSA-N 0.000 description 2
- CTRPRMNBTVRDFH-UHFFFAOYSA-N 2-n-methyl-1,3,5-triazine-2,4,6-triamine Chemical compound CNC1=NC(N)=NC(N)=N1 CTRPRMNBTVRDFH-UHFFFAOYSA-N 0.000 description 2
- FMFHUEMLVAIBFI-UHFFFAOYSA-N 2-phenylethenyl acetate Chemical compound CC(=O)OC=CC1=CC=CC=C1 FMFHUEMLVAIBFI-UHFFFAOYSA-N 0.000 description 2
- DXIJHCSGLOHNES-UHFFFAOYSA-N 3,3-dimethylbut-1-enylbenzene Chemical compound CC(C)(C)C=CC1=CC=CC=C1 DXIJHCSGLOHNES-UHFFFAOYSA-N 0.000 description 2
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 2
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- SNRUBQQJIBEYMU-UHFFFAOYSA-N Dodecane Natural products CCCCCCCCCCCC SNRUBQQJIBEYMU-UHFFFAOYSA-N 0.000 description 2
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- IBMRTYCHDPMBFN-UHFFFAOYSA-N Mono-Me ester-Pentanedioic acid Natural products COC(=O)CCCC(O)=O IBMRTYCHDPMBFN-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 239000003377 acid catalyst Substances 0.000 description 2
- 238000007259 addition reaction Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000005456 alcohol based solvent Substances 0.000 description 2
- 230000001476 alcoholic effect Effects 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 2
- LPIQUOYDBNQMRZ-UHFFFAOYSA-N cyclopentenylidene Natural products C1CC=CC1 LPIQUOYDBNQMRZ-UHFFFAOYSA-N 0.000 description 2
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- JZRGFKQYQJKGAK-UHFFFAOYSA-N ethenyl cyclohexanecarboxylate Chemical compound C=COC(=O)C1CCCCC1 JZRGFKQYQJKGAK-UHFFFAOYSA-N 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- QVTWBMUAJHVAIJ-UHFFFAOYSA-N hexane-1,4-diol Chemical compound CCC(O)CCCO QVTWBMUAJHVAIJ-UHFFFAOYSA-N 0.000 description 2
- 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 2
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 150000007974 melamines Chemical class 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 2
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 2
- YKYONYBAUNKHLG-UHFFFAOYSA-N propyl acetate Chemical compound CCCOC(C)=O YKYONYBAUNKHLG-UHFFFAOYSA-N 0.000 description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- RUELTTOHQODFPA-UHFFFAOYSA-N toluene 2,6-diisocyanate Chemical compound CC1=C(N=C=O)C=CC=C1N=C=O RUELTTOHQODFPA-UHFFFAOYSA-N 0.000 description 2
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 2
- SRPWOOOHEPICQU-UHFFFAOYSA-N trimellitic anhydride Chemical compound OC(=O)C1=CC=C2C(=O)OC(=O)C2=C1 SRPWOOOHEPICQU-UHFFFAOYSA-N 0.000 description 2
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 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
- WXUAQHNMJWJLTG-VKHMYHEASA-N (S)-methylsuccinic acid Chemical compound OC(=O)[C@@H](C)CC(O)=O WXUAQHNMJWJLTG-VKHMYHEASA-N 0.000 description 1
- HDPNBNXLBDFELL-UHFFFAOYSA-N 1,1,1-trimethoxyethane Chemical compound COC(C)(OC)OC HDPNBNXLBDFELL-UHFFFAOYSA-N 0.000 description 1
- XMKLTEGSALONPH-UHFFFAOYSA-N 1,2,4,5-tetrazinane-3,6-dione Chemical group O=C1NNC(=O)NN1 XMKLTEGSALONPH-UHFFFAOYSA-N 0.000 description 1
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 description 1
- QQZOPKMRPOGIEB-UHFFFAOYSA-N 2-Oxohexane Chemical compound CCCCC(C)=O QQZOPKMRPOGIEB-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- NQBXSWAWVZHKBZ-UHFFFAOYSA-N 2-butoxyethyl acetate Chemical compound CCCCOCCOC(C)=O NQBXSWAWVZHKBZ-UHFFFAOYSA-N 0.000 description 1
- BNCADMBVWNPPIZ-UHFFFAOYSA-N 2-n,2-n,4-n,4-n,6-n,6-n-hexakis(methoxymethyl)-1,3,5-triazine-2,4,6-triamine Chemical compound COCN(COC)C1=NC(N(COC)COC)=NC(N(COC)COC)=N1 BNCADMBVWNPPIZ-UHFFFAOYSA-N 0.000 description 1
- SUMXBOIZNXAYBM-UHFFFAOYSA-N 2-n-(2-methylpropoxy)-1,3,5-triazine-2,4,6-triamine Chemical compound CC(C)CONC1=NC(N)=NC(N)=N1 SUMXBOIZNXAYBM-UHFFFAOYSA-N 0.000 description 1
- XDZQCVCQMCYJAW-UHFFFAOYSA-N 2-n-(aminomethyl)-1,3,5-triazine-2,4,6-triamine Chemical compound NCNC1=NC(N)=NC(N)=N1 XDZQCVCQMCYJAW-UHFFFAOYSA-N 0.000 description 1
- KFVIYKFKUYBKTP-UHFFFAOYSA-N 2-n-(methoxymethyl)-1,3,5-triazine-2,4,6-triamine Chemical compound COCNC1=NC(N)=NC(N)=N1 KFVIYKFKUYBKTP-UHFFFAOYSA-N 0.000 description 1
- SLLUHROOFRDQLU-UHFFFAOYSA-N 2-n-butoxy-1,3,5-triazine-2,4,6-triamine Chemical compound CCCCONC1=NC(N)=NC(N)=N1 SLLUHROOFRDQLU-UHFFFAOYSA-N 0.000 description 1
- CVKGSDYWCFQOKU-UHFFFAOYSA-N 2-n-butyl-1,3,5-triazine-2,4,6-triamine Chemical compound CCCCNC1=NC(N)=NC(N)=N1 CVKGSDYWCFQOKU-UHFFFAOYSA-N 0.000 description 1
- UUEWCQRISZBELL-UHFFFAOYSA-N 3-trimethoxysilylpropane-1-thiol Chemical compound CO[Si](OC)(OC)CCCS UUEWCQRISZBELL-UHFFFAOYSA-N 0.000 description 1
- XDLMVUHYZWKMMD-UHFFFAOYSA-N 3-trimethoxysilylpropyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C(C)=C XDLMVUHYZWKMMD-UHFFFAOYSA-N 0.000 description 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- FKXISKWWZKRPED-UHFFFAOYSA-N C(CCC)ONC1(N(C(N(C(=N1)N)OCCCC)(N(C)OCCCC)OCCCC)OCCCC)OCCCC Chemical compound C(CCC)ONC1(N(C(N(C(=N1)N)OCCCC)(N(C)OCCCC)OCCCC)OCCCC)OCCCC FKXISKWWZKRPED-UHFFFAOYSA-N 0.000 description 1
- ONZYEDGRAXDLJX-UHFFFAOYSA-N COC(C(ON(C1=NC(=NC(=N1)N)N)C)(OC)OC)CC(OC)(OC)OC Chemical compound COC(C(ON(C1=NC(=NC(=N1)N)N)C)(OC)OC)CC(OC)(OC)OC ONZYEDGRAXDLJX-UHFFFAOYSA-N 0.000 description 1
- 229920003275 CYMEL® 325 Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920003270 Cymel® Polymers 0.000 description 1
- MUXOBHXGJLMRAB-UHFFFAOYSA-N Dimethyl succinate Chemical compound COC(=O)CCC(=O)OC MUXOBHXGJLMRAB-UHFFFAOYSA-N 0.000 description 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- NTIZESTWPVYFNL-UHFFFAOYSA-N Methyl isobutyl ketone Chemical compound CC(C)CC(C)=O NTIZESTWPVYFNL-UHFFFAOYSA-N 0.000 description 1
- UIHCLUNTQKBZGK-UHFFFAOYSA-N Methyl isobutyl ketone Natural products CCC(C)C(C)=O UIHCLUNTQKBZGK-UHFFFAOYSA-N 0.000 description 1
- IIGAAOXXRKTFAM-UHFFFAOYSA-N N=C=O.N=C=O.CC1=C(C)C(C)=C(C)C(C)=C1C Chemical compound N=C=O.N=C=O.CC1=C(C)C(C)=C(C)C(C)=C1C IIGAAOXXRKTFAM-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
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 description 1
- YGCOKJWKWLYHTG-UHFFFAOYSA-N [[4,6-bis[bis(hydroxymethyl)amino]-1,3,5-triazin-2-yl]-(hydroxymethyl)amino]methanol Chemical compound OCN(CO)C1=NC(N(CO)CO)=NC(N(CO)CO)=N1 YGCOKJWKWLYHTG-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- ISRTYGKYJFAVAV-UHFFFAOYSA-N acetic acid dimethyl hexanedioate Chemical compound C(CCCCC(=O)OC)(=O)OC.C(C)(=O)O ISRTYGKYJFAVAV-UHFFFAOYSA-N 0.000 description 1
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-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
- VEIOBOXBGYWJIT-UHFFFAOYSA-N cyclohexane;methanol Chemical compound OC.OC.C1CCCCC1 VEIOBOXBGYWJIT-UHFFFAOYSA-N 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- OTARVPUIYXHRRB-UHFFFAOYSA-N diethoxy-methyl-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](C)(OCC)CCCOCC1CO1 OTARVPUIYXHRRB-UHFFFAOYSA-N 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- XTDYIOOONNVFMA-UHFFFAOYSA-N dimethyl pentanedioate Chemical compound COC(=O)CCCC(=O)OC XTDYIOOONNVFMA-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- 229940093499 ethyl acetate Drugs 0.000 description 1
- 235000019439 ethyl acetate Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000004905 finger nail Anatomy 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- UOBSVARXACCLLH-UHFFFAOYSA-N monomethyl adipate Chemical compound COC(=O)CCCCC(O)=O UOBSVARXACCLLH-UHFFFAOYSA-N 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 1
- ULWHHBHJGPPBCO-UHFFFAOYSA-N propane-1,1-diol Chemical compound CCC(O)O ULWHHBHJGPPBCO-UHFFFAOYSA-N 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 150000003254 radicals Chemical group 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- FRGPKMWIYVTFIQ-UHFFFAOYSA-N triethoxy(3-isocyanatopropyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCN=C=O FRGPKMWIYVTFIQ-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
- C08L61/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
- C08L61/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- 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
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
Definitions
- the present invention relates to a clear coat composition, and more particularly, to a clear coat composition having excellent external appearance properties, scratch resistance and weather resistance of a produced coating film.
- a plurality of coating processes such as electrodeposition painting, intermediate painting, base painting, and clear painting are performed in the automobile painting system.
- the prior art secures initial scratch resistance by adding a block isocyanate resin to the main reaction structure of an acrylic resin and a melamine resin to impart flexibility to the coating film.
- Korean Patent Registration No. 10-1115869 discloses a one-component clear coat composition for automobiles containing an acrylic resin, a melamine resin, a silane-modified blocked isocyanate resin, and a flowability adjusting resin.
- this prior art has a problem in that long-term weather resistance and scratch resistance are deteriorated by lowering the crosslinking density of the final coating film.
- the present invention improves the crosslinking density of the final coating film and at the same time imparts flexibility and elasticity to the appearance and scratch resistance of the vehicle at the beginning of production, as well as the appearance and gloss, scratch resistance after long-term driving or outdoor exposure, It is an object of the present invention to provide a clear coat composition capable of maintaining weather resistance and chipping resistance.
- the present invention includes an acrylic silane resin, a polyester resin, a urethane oligomer, a silane-modified polyisocyanate resin, a melamine resin, and an acrylic resin, wherein the polyester resin has a hydroxyl value (OHv) of 250 to 400 mgKOH/ g, a number average molecular weight (Mn) of 350 to 600 g/mol, and the silane-modified polyisocyanate resin has a number average molecular weight (Mn) of 1,000 to 4,000 g/mol.
- OHv hydroxyl value
- Mn number average molecular weight
- Mn number average molecular weight
- the clear coat composition according to one aspect of the present invention improves the crosslinking density of the final coating film and at the same time imparts flexibility and elasticity, so that not only the appearance and scratch resistance of the vehicle at the beginning of production, but also the appearance and gloss after long-term driving or outdoor exposure , it is possible to form a coating film capable of maintaining scratch resistance, weather resistance, and chipping resistance performance.
- weight average molecular weight (Mw) and “number average molecular weight (Mn)” are measured by a method commonly known in the art to which the present invention belongs, for example, a method such as gel permeation chromatograph (GPC) can be measured with
- glass transition temperature (Tg) is measured by a method commonly known in the art to which the present invention pertains, and can be measured by, for example, differential scanning calorimetry (DSC).
- (meth)acryl means “acryl” and/or “methacryl”
- (meth)acrylate means “acrylate” and/or “methacrylate”.
- parts by weight means the ratio of the weight between each component.
- a clear coat composition according to one aspect of the present invention may include an acrylic silane resin, a polyester resin, a urethane oligomer, a silane-modified polyisocyanate resin, a melamine resin, and an acrylic resin.
- the acrylsilane resin serves to improve appearance properties such as durability and gloss of a coating film prepared from a clear coat composition containing the same.
- the acrylsilane resin refers to a silane-modified acrylic resin, and directly synthesized according to a known method may be used, or a commercially available product may be used.
- the acrylsilane resin may be obtained by modifying an acrylic resin prepared from at least one of the first vinyl-based monomer and the first (meth)acrylate-based monomer with a silane monomer.
- the first vinyl monomer is, for example, styrene, methylstyrene, dimethylstyrene, fluorostyrene, ethoxystyrene, methoxystyrene, phenylene vinyl ketone, vinyl t-butyl benzoate, vinyl cyclohexanoate, vinyl acetate, vinyl vinyl It may be at least one selected from the group consisting of rolidone, vinyl chloride, vinyl alcohol, acetoxy styrene, t-butyl styrene and vinyl toluene, but is not limited thereto.
- the first (meth)acrylate monomer may include at least one selected from the group consisting of a hydroxyl group-free (meth)acrylate monomer and a hydroxyl group-containing (meth)acrylate monomer.
- (meth)acrylate monomers without a hydroxy group include, for example, (meth)acrylic acid, methyl (meth)acrylic acid, (meth)acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate , isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate )Acrylate, isooctyl (meth)acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isodecyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate It may contain one or
- the hydroxyl group-containing (meth)acrylate monomer may be, for example, a hydroxyalkyl-containing (meth)acrylate, specifically 2-hydroxymethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2 - It may contain at least one selected from the group consisting of hydroxypropyl (meth)acrylate and 2-hydroxybutyl (meth)acrylate.
- the silane monomer may be a silane monomer containing an alkoxy group.
- Silane monomers such as gamma-glycidoxypropyl triethoxy silane, gamma-glycidoxypropyl trimethoxy silane, gamma-glycidoxypropyl methyldiethoxy silane, gamma-glycidoxypropyl triethoxy silane, 3- Mercaptopropyl trimethoxy silane, vinyltrimethoxysilane, vinyltriethoxy silane, gamma-methacryloxypropyl trimethoxy silane, gamma-methacryloxy propyl triethoxy silane, gamma-aminopropyl trimethoxy silane , gamma-aminopropyl triethoxy silane, 3-isocyanato propyl triethoxy silane, gamma-acetoacetate propyl trimethoxysilane, gamma-ace
- the acrylic silane resin may be, for example, silane-modified after preparing an acrylic resin using a radical polymerization method, and depending on the initiator and polymerization time, physical properties, that is, weight average molecular weight (Mw), hydroxyl value (OHv), acid value ( Av) can be adjusted.
- Mw weight average molecular weight
- OHv hydroxyl value
- Av acid value
- the acrylsilane resin may have a weight average molecular weight (Mw) of 7,000 to 9,000 g/mol, 7,500 to 8,500 g/mol, or 7,800 to 8,200 g/mol.
- Mw weight average molecular weight
- the weight average molecular weight of the acrylic silane resin is within the above range, long-term physical properties such as durability and weather resistance of the produced coating film may be excellent.
- the weight average molecular weight of the acrylic silane resin is less than the above range, the molecular weight is small, resulting in poor weatherability and scratch resistance of the prepared coating film, and when it exceeds the above range, the flowability is lowered due to the increase in molecular weight, so the work of the clear coat composition including it Due to poor properties and poor surface smoothness, it is difficult to manufacture a coating film having an excellent appearance.
- the acrylsilane resin may have a hydroxyl value (OHv) of 70 to 100 mgKOH/g or 75 to 95 mgKOH/g.
- OHv hydroxyl value
- the hydroxyl value of the acrylic silane resin is within the above range, durability and weather resistance of the coating film are improved.
- the hydroxyl value of the acrylic silane resin is less than the above range, the formation of a coating film by a crosslinking reaction with the curing agent is insufficient, and mechanical properties such as hardness of the coating film are lowered. This may cause a problem in that the appearance properties of the produced coating film are insufficient.
- the acrylsilane resin may have an acid value (Av) of 5 mgKOH/g or less, or 0.1 to 5 mgKOH/g.
- Av acid value of the acrylsilane resin
- the reactivity of the composition containing the acrylic silane resin may be adjusted to improve the appearance characteristics of the coating film prepared therefrom.
- the acid value of the acrylic silane resin is less than the above range, the curing reaction rate is lowered, resulting in a problem of deteriorating the appearance of the produced coating film. degradation may occur.
- the acrylsilane resin may have a glass transition temperature (Tg) of 30 to 50°C or 35 to 45°C.
- Tg glass transition temperature
- the glass transition temperature of the acrylic silane resin is within the above range, there is an effect of improving the hardness and solvent resistance of the coating film.
- the glass transition temperature of the acrylic silane resin is less than the above range, the drying speed and crosslinking density of the coating film are lowered, resulting in insufficient hardness and solvent resistance of the produced coating film.
- the appearance characteristics and chipping resistance of the coated film may be insufficient.
- the acrylsilane resin may have a solids content (NV) of 60 to 80% by weight, 65 to 75% by weight, or 68 to 73% by weight based on the total weight of the resin.
- NV solids content
- the solid content of the acrylsilane resin is within the above range, storage stability of the resin and storage stability of the clear coat composition may be improved and workability may be excellent.
- the solid content of the acrylic silane resin is less than the above range, the viscosity is too low, resulting in poor workability of the clear coat composition containing the same. Aggregation may occur over time due to poor stability.
- the acrylsilane resin may be included in an amount of 30 to 50% by weight, 35 to 45% by weight, or 37 to 43% by weight based on the total weight of the clear coat composition.
- the acrylsilane resin is included within the above content range, there is an effect of improving the adhesion and durability of the coating film. If the content of the acrylic silane resin is less than the above range, the drying property is deteriorated, resulting in a decrease in the adhesion, gloss and durability of the coating film. As a result, the appearance of the coating film and scratch resistance may be deteriorated.
- the polyester resin serves to impart flexibility to the coating film, improve crosslinking density, and improve scratch resistance.
- Polyester resin is a high-functionality and low-molecular-weight resin containing three or more hydroxyl groups in a repeating unit. Due to its high functionality, the polyester resin improves the reactivity and crosslinking density of a clear coat composition containing the polyester resin, thereby improving durability and mechanical properties of a coating film prepared therefrom. There is an effect of improving physical properties, and by including a high-functionality and low-molecular-weight polyester resin, flexibility is imparted to the clear coat composition to improve smoothness and crosslinking density, thereby improving the appearance characteristics and scratch resistance of the coating film. .
- a polyester resin synthesized directly according to a known method may be used, or a commercially available product may be used.
- the polyester resin can be produced, for example, from a condensation reaction of a polyol monomer having two or more hydroxyl groups in one molecule and a carboxyl group-containing monomer.
- the polyester resin may be prepared from a first polyol monomer having two hydroxyl groups in one molecule, a second polyol monomer having three or more hydroxyl groups in one molecule, and a carboxyl group-containing monomer.
- Carboxyl group-containing monomers include, for example, adipic acid (AA), isophthalic acid (IPA), trimellitic anhydride (TMA), hexahydrophthalic anhydride (HHPA), cycloaliphatic acid, phthalic anhydride, isophthalic acid, terephthalic acid, succinic acid, adipic acid , fumaric acid, maleic anhydride, tetrahydrophthalic anhydride, caprolactone, and derivatives thereof.
- AA adipic acid
- IPA isophthalic acid
- TMA trimellitic anhydride
- HHPA hexahydrophthalic anhydride
- cycloaliphatic acid phthalic anhydride
- isophthalic acid terephthalic acid
- succinic acid adipic acid
- fumaric acid maleic anhydride
- tetrahydrophthalic anhydride caprolactone
- the first polyol monomer has two hydroxyl groups in one molecule, such as cyclohexane dimethanol (CHDM), polyethylene glycol, 1,6-hexanediol (1,6-HD), neopentyl glycol (NPG), and ethylene glycol.
- CHDM cyclohexane dimethanol
- polyethylene glycol 1,6-hexanediol
- NPG neopentyl glycol
- propylene glycol, diethylene glycol, butanediol, 1,4-hexanediol and 3-methylpentanediol may be one or more selected from the group consisting of.
- the second polyol has three or more hydroxyl groups in one molecule, and may be, for example, at least one selected from the group consisting of trimethylol propane (TMP), trimethylolethane, pentaerythritol, and glycerin.
- TMP trimethylol propane
- TMP trimethylolethane
- pentaerythritol pentaerythritol
- glycerin trimethylol propane
- the polyester resin may be manufactured using a condensation reaction between an acid and an alcohol, and physical properties such as number average molecular weight (Mn), hydroxyl value (OHv), and acid value (Av) can be controlled according to the input ratio of acid and alcohol.
- Mn number average molecular weight
- OHv hydroxyl value
- Av acid value
- the polyester resin may have a number average molecular weight (Mn) of 350 to 600 g/mol, 400 to 550 g/mol, or 450 to 500 g/mol.
- Mn number average molecular weight
- smoothness of the clear coat composition is improved and a soft coating film is formed to improve scratch resistance and hardness.
- the number average molecular weight of the polyester resin is less than the above range, there is a problem that the molecular weight is small and the mechanical properties of the prepared coating film are deteriorated. This may cause a problem in which scratch resistance is reduced and scratch resistance is reduced.
- the polyester resin may have a hydroxyl value (OHv) of 250 to 400 mgKOH/g, 300 to 350 mgKOH/g, or 300 to 330 mgKOH/g.
- OHv hydroxyl value
- the reactivity with the melamine resin is improved to increase the crosslinking density of the coating film, thereby improving mechanical properties, appearance and chemical resistance.
- the hydroxyl value of the polyester resin is less than the above range, there is a problem in that the durability and chemical resistance of the produced coating film is lowered due to insufficient reactivity with the melamine resin and insufficient crosslinking density, and when it exceeds the above range, the coating film is overcured and brittle (brittle) may cause a problem of deterioration in appearance and scratch resistance.
- the polyester resin may have a viscosity at 25° C. of 800 to 1,200 cps, 850 to 1,150 cps, or 900 to 1,100 cps.
- the viscosity of the polyester resin at 25° C. is within the above range, the viscosity of the clear coat composition is appropriate and workability is improved. If the viscosity of the polyester resin at 25 ° C. is less than the above range, the viscosity of the composition is too low, resulting in poor coating flow, adhesion and scratch resistance due to non-formation of the prepared coating film, and if it exceeds the above range, the composition Due to the lack of workability, a problem of deterioration of the appearance characteristics of the manufactured coating film may occur.
- the polyester resin may be included in an amount of 1 to 12% by weight, 1 to 10% by weight, or 3 to 8% by weight based on the total weight of the clear coat composition.
- the polyester resin is included within the above content range, there is an effect of improving external scratch resistance and smoothness of the coating film. If the content of the polyester resin in the composition is less than the above range, the crosslinking density is lowered, resulting in deterioration in appearance and scratch resistance. And a problem of deterioration of mechanical properties may occur.
- the urethane oligomer provides elasticity to a coating film made of a clear coat composition containing the oligomer and serves to improve gloss, smoothness, and scratch resistance.
- the urethane oligomer may have a low glass transition temperature and high functionality of trifunctional or higher. As described above, when the glass transition temperature of the urethane oligomer is low, a soft coating is formed to improve the appearance and scratch resistance, and when the urethane oligomer has a trifunctional or higher functionality, flexibility and elasticity of a clear coat composition including the oligomer are increased. There is an effect of improving the appearance characteristics and scratch resistance of the coating film prepared therefrom.
- the urethane oligomer one synthesized directly according to a known method may be used, or a commercially available product may be used.
- the urethane oligomer can be prepared from, for example, an alcohol-based monomer and a polyfunctional isocyanate-based monomer containing two or more isocyanates in one molecule.
- Alcoholic monomers include, for example, cyclohexanol, ethylhexanol, butanol, 1,6-hexanediol, ethylene glycol, propylene glycol, diethylene glycol, butylene glycol, neopentyl glycol, trimethylol propane, butanediol, 1 It may be at least one selected from the group consisting of ,4-hexanediol and 3-methylpentanediol.
- Polyfunctional isocyanate-based monomers include, for example, hexamethylene diisocyanate (HMDI), isophorone diisocyanate, trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, propylene diisocyanate, ethylene diisocyanate, 2,3- Dimethylethylene diisocyanate, 1-methyltrimethylene diisocyanate, 1,3-cyclopentene diisocyanate, 1,4-cyclopentene diisocyanate, 1,2-cyclopentene diisocyanate, 1,3-phenylene diisocyanate, 1, 4-phenylene diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4-diphenylpropane diisocyanate, xylene diisocyanate, 1,1,6,6-tetramethylhexamethylene diisocyanate , It may be one or more selected from the
- the urethane oligomer may be prepared using an addition reaction of a polyfunctional isocyanate-based monomer and an alcohol-based monomer, and physical properties such as number average molecular weight (Mn) and glass transition temperature (Tg) may be adjusted according to the reaction ratio. .
- the urethane oligomer may not contain unreacted NCO groups.
- the appearance of the produced coating film is excellent.
- the urethane oligomer may have a number average molecular weight (Mn) of 700 to 1,300 g/mol or 900 to 1,100 g/mol.
- Mn number average molecular weight
- the smoothness of the clear coat composition is improved and a soft coating film is formed, so that the coating film has excellent gloss and appearance properties.
- the number average molecular weight of the urethane oligomer is less than the above range, the molecular weight is small and mechanical properties and weather resistance are deteriorated. Brittle) may cause a problem of deterioration in scratch resistance.
- the urethane oligomer may have a glass transition temperature (Tg) of -10 to -30 °C or -15 to -25 °C.
- Tg glass transition temperature
- flexibility of the coating film is increased, thereby improving gloss properties and scratch resistance of the coating film.
- the glass transition temperature of the urethane oligomer is less than the above range, the elasticity of the coating film increases and the hardness decreases, and the drying property of the clear coat composition deteriorates, resulting in a decrease in the appearance properties of the coating film. If it exceeds the above range, the flowability of the clear coat composition decreases As a result, the appearance properties are deteriorated and the elasticity of the coating film is lowered, which may cause problems in that adhesion and scratch resistance are deteriorated.
- the urethane oligomer may have a solids content of 70 to 90% by weight, or 75 to 85% by weight based on the total weight of the oligomer.
- the solid content of the urethane oligomer is within the above range, the workability of the clear coat composition is improved.
- the solid content of the urethane oligomer is less than the above range, the viscosity is excessively low and the flowability is deteriorated, and the workability of the clear coat composition including the same is insufficient. , Dispersion stability deteriorates, and aggregates may occur in the clear coat composition over time.
- the urethane oligomer may be included in an amount of 1 to 15% by weight, 3 to 12% by weight, preferably 5 to 10% by weight based on the total weight of the clear coat composition.
- flexibility and appearance characteristics of the prepared coating film are excellent.
- the content of the urethane oligomer in the clear coat composition is less than the above range, the crosslinking density of the coating film is lowered, resulting in a decrease in scratch resistance and appearance. A problem in that the drying property is lowered and the hardness of the coating film is lowered may occur.
- the silane-modified polyisocyanate resin serves to improve the crosslinking density, smoothness, and scratch resistance of a coating film after weather resistance.
- silane-modified polyisocyanate resin one synthesized directly according to a known method or a commercially available product may be used.
- the silane-modified polyisocyanate resin may be, for example, a polyisocyanate resin prepared from at least one of an alcohol-based monomer and an isocyanate-based compound modified with a silane monomer. More specifically, the silane-modified polyisocyanate resin is prepared by reacting at least one of an alcohol-based monomer and an isocyanate-based compound to prepare a polyisocyanate resin having a free NCO group, and then reacting with a silane monomer such as aminosilane. It may be silane-modified. Therefore, the polyisocyanate resin modified with aminosilane may have a urea-urethane-urea structure.
- the silane-modified polyisocyanate resin may be obtained by modifying an isocyanate-based compound with a silane monomer. More specifically, the silane-modified polyisocyanate resin may be silane-modified by reacting an isocyanate-based compound with a silane monomer such as aminosilane. Therefore, the polyisocyanate resin modified with aminosilane may have a urea structure.
- Alcoholic monomers include, for example, cyclohexanol, cyclohexanedimethanol (CHDM) ethylhexanol, butanol, 1,6-hexanediol, ethylene glycol, propylene glycol, diethylene glycol, butylene glycol, neopentyl glycol ( NPG), trimethylol propane (TMP), propanediol, butanediol, 1,4-hexanediol, 3-methylpentanediol, and pentaerythritol.
- CHDM cyclohexanedimethanol
- NPG neopentyl glycol
- TMP trimethylol propane
- propanediol butanediol
- 1,4-hexanediol 1,4-hexanediol
- 3-methylpentanediol pentaerythritol.
- Isocyanate-based compounds include, for example, hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, propylene diisocyanate, ethylene diisocyanate, 2,3 -Dimethylethylene diisocyanate, 1-methyltrimethylene diisocyanate, 1,3-cyclopentene diisocyanate, 1,4-cyclopentene diisocyanate, 1,2-cyclopentene diisocyanate, 1,3-phenylene diisocyanate, 1 ,4-phenylene diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, methylene diphenyl diisocyanate (MDI), 4,4-diphenylpropane diisocyanate, xylene diisocyanate, tetramethylx
- the silane monomer may be an amine group-containing silane monomer.
- the silane monomer may be, for example, bis-gamma-trimethoxysilylpropylamine, bis-gamma-triethoxysilylpropylamine, aminopropyltriethoxysilane, or aminopropyltrimethoxysilane.
- the silane-modified polyisocyanate resin is, for example, a polyisocyanate resin prepared by using an addition reaction of an isocyanate-based compound and an alcohol-based monomer, and then modified with a silane monomer such as aminosilane, or a silane such as aminosilane is added to an isocyanate-based compound. It may be modified into a monomer, and physical properties such as number average molecular weight (Mn) and glass transition temperature (Tg) may be adjusted according to the reaction ratio.
- Mn number average molecular weight
- Tg glass transition temperature
- the silane-modified polyisocyanate resin may have a number average molecular weight (Mn) of 1,000 to 4,000 g/mol or 1,500 to 3,000 g/mol.
- Mn number average molecular weight
- the number average molecular weight of the silane-modified polyisocyanate resin is within the above range, the crosslinking density and smoothness of the clear coat composition are improved, so that the coating film prepared therefrom has excellent weather resistance and scratch resistance.
- the number average molecular weight of the silane-modified polyisocyanate resin is less than the above range, the molecular weight is small and mechanical properties and weather resistance are deteriorated. Brittle (Brittle) may cause a problem that the scratch resistance is lowered.
- the silane-modified polyisocyanate resin may have a viscosity of 400 to 1,200 cps or 500 to 1,000 cps at 25°C.
- the viscosity of the silane-modified polyisocyanate resin is within the above range, the viscosity of the clear coat composition is appropriate and workability is improved.
- the viscosity of the silane-modified polyisocyanate resin at 25° C. is less than the above range, the viscosity of the composition is too low, resulting in poor smoothness, adhesion and scratch resistance due to non-formation of the prepared coating film, and when it exceeds the above range, the composition Due to the lack of workability, a problem of deterioration of the appearance characteristics of the manufactured coating film may occur.
- the silane-modified polyisocyanate resin may have a solid content of 70 to 90% by weight or 75 to 85% by weight based on the total weight of the resin.
- the solid content of the silane-modified polyisocyanate resin is within the above range, the workability of the clear coat composition is improved.
- the solid content of the silane-modified polyisocyanate resin is less than the above range, the viscosity is excessively low, resulting in poor flowability and poor workability of the clear coat composition. Stability is lowered, dispersion stability is deteriorated, and aggregates may be generated in the clear coat composition over time.
- the silane-modified polyisocyanate resin may have 7 to 26 or 9 to 24 alkoxy groups bonded to a plurality of Sis in the resin.
- the crosslinking density of the clear coat composition is improved, so that weather resistance and mechanical properties are excellent.
- the number of alkoxy groups of the silane-modified polyisocyanate resin is less than the above range, the crosslinking density is lowered and weather resistance and scratch resistance are lowered. may be lowered
- the silane-modified polyisocyanate resin may be included in an amount of 1 to 15% by weight, 3 to 12% by weight, or 5 to 10% by weight based on the total weight of the clear coat composition.
- the silane-modified polyisocyanate resin is included within the above content range, the crosslinking density is improved, thereby improving adhesion and scratch resistance of the coating film.
- the content of the silane-modified polyisocyanate resin is less than the above range, the elasticity of the coating film is lowered, resulting in a decrease in chipping resistance and scratch resistance. A problem in which scratch resistance is reduced and the coating workability and coating flowability of the composition is insufficient may cause a problem in that the appearance of the coating film is deteriorated.
- Melamine resin serves to cure the composition by crosslinking with each component of the clear coat composition and improve the hardness of the coating film.
- the melamine resin may be an alkylated melamine resin, and directly synthesized according to a known method or a commercially available product may be used.
- Melamine resins include, for example, methoxy methyl melamine, methyl melamine, butyl melamine, isobutoxy melamine, butoxy melamine, hexamethylol melamine, hexamethoxy methyl melamine, hexabutoxy methyl melamine, hexamethoxybutoxy methyl melamine and aminomethyl melamine. It may include at least one selected from the group consisting of toxy methyl melamine.
- the melamine resin may have a weight average molecular weight (Mw) of 500 to 1,000 g/mol, 600 to 900 g/mol, or 500 to 800 g/mol.
- Mw weight average molecular weight
- the weight average molecular weight of the melamine resin is within the above range, there is an effect of improving the adhesion and hardness of the coating film prepared by improving the crosslinking density.
- the weight average molecular weight of the melamine resin is less than the above range, the crosslinking density of the coating film is lowered, resulting in a decrease in chemical resistance and scratch resistance.
- the melamine resin may have a viscosity at 25° C. of 2,000 to 4,000 cps, 2,200 to 3,900 cps, or 2,400 to 3,800 cps.
- a viscosity at 25° C. of 2,000 to 4,000 cps, 2,200 to 3,900 cps, or 2,400 to 3,800 cps.
- gloss and appearance are excellent.
- the viscosity at 25 ° C. of the melamine resin is less than the above range, the viscosity is low and the adhesion and scratch resistance of the coating film is deteriorated due to the formation of a coating film, and if the viscosity exceeds the above range, the workability of the composition is poor A problem may occur due to lack of appearance characteristics.
- Examples of commercially available melamine resins include CYTEC's CYMEL-325, CYMEL-303, CYMEL-1161 and CYMEL-1168, and BASF's LUWIPAL 012 and LUWIPAL 072.
- the melamine resin may be included in an amount of 5 to 25% by weight, 7 to 23% by weight, or 10 to 20% by weight based on the total weight of the clear coat composition.
- the content of the melamine resin is within the above range, there is an effect of improving the adhesion and hardness of the prepared coating film by improving the crosslinking density. If the content of the melamine resin is less than the above range, there is a problem in that the hardness and appearance characteristics are deteriorated due to a decrease in curability, and when the content exceeds the above range, the coating film is brittle due to excessive curability, resulting in adhesion, impact resistance and scratch resistance degradation may occur.
- An acrylic resin may be included to control the flowability of the composition.
- the acrylic resin one synthesized directly according to a known method may be used, or a commercially available product may be used.
- the acrylic resin may be prepared, for example, by polymerizing at least one of a second vinyl-based monomer and a second (meth)acrylate-based monomer.
- the acrylic resin may be prepared by reacting a second vinyl-based monomer, a second (meth)acrylic monomer, and benzyl amine, and may have a chemical structure in which a needle-shaped diurea group exists.
- Examples of the second vinyl monomer include styrene, methylstyrene, dimethylstyrene, fluorostyrene, ethoxystyrene, methoxystyrene, phenylene vinyl ketone, vinyl t-butyl benzoate, vinyl cyclohexanoate, vinyl acetate, vinyl At least one selected from the group consisting of pyrrolidone, vinyl chloride, vinyl alcohol, acetoxy styrene, t-butyl styrene and vinyl toluene may be used.
- the second (meth)acrylate-based monomer may include at least one selected from the group consisting of a hydroxy group-free (meth)acrylate monomer and a hydroxyl group-containing (meth)acrylate monomer.
- (meth)acrylate monomers containing no hydroxy group include, for example, (meth)acrylic acid, methyl (meth)acrylic acid, (meth)acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, ) Acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, Heptyl (meth) acrylate, isooctyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, decyl (meth) acrylate, dodecyl ( It may include at least one selected
- the hydroxy group-containing (meth)acrylate monomer may be, for example, a hydroxyalkyl-containing (meth)acrylate, specifically 2-hydroxy methyl (meth) acrylate, 2-hydroxy ethyl (meth) acrylate rate, 2-hydroxy propyl (meth) acrylate and 2-hydroxy butyl (meth) acrylate may include one or more selected from the group consisting of.
- the acrylic resin may be prepared, for example, using a radical polymerization method, and physical properties such as weight average molecular weight (Mw), hydroxyl value (OHv), and acid value (Av) may be adjusted according to an initiator and polymerization time.
- Mw weight average molecular weight
- OHv hydroxyl value
- Av acid value
- the acrylic resin may have a weight average molecular weight (Mw) of 6,000 to 9,000 g/mol, 6,500 to 8,500 g/mol, or 7,000 to 8,000 g/mol.
- Mw weight average molecular weight
- the flowability of the composition is appropriate and workability may be excellent.
- the weight average molecular weight of the acrylic resin is less than the above range, there is a problem that the flowability of the clear coat composition is insufficient due to the small molecular weight, and the workability is poor, and the acid resistance and chemical resistance of the prepared coating film are lowered, and when it exceeds the above range As the molecular weight increases, the workability of the clear coat composition composition becomes poor and the surface smoothness is poor, making it difficult to prepare a coating film having excellent appearance and gloss.
- the acrylic resin may have a hydroxyl value (OHv) of 110 to 200 mgKOH/g or 140 to 150 mgKOH/g.
- OHv hydroxyl value
- the hydroxyl value of the acrylic resin is within the above range, there is an effect of improving the weather resistance of the coating film.
- the hydroxyl value of the acrylic resin is less than the above range, the formation of a coating film by a crosslinking reaction with the curing agent is insufficient, and mechanical properties such as hardness of the coating film are lowered. It may fall off, and problems such as lack of appearance characteristics, water resistance and scratch resistance of the produced coating film may occur.
- the acrylic resin may have a glass transition temperature (Tg) of 0.5 to 10 °C or 1 to 5 °C.
- Tg glass transition temperature
- the acrylic resin may have a glass transition temperature (Tg) of 0.5 to 10 °C or 1 to 5 °C.
- Tg glass transition temperature
- the glass transition temperature of the acrylic resin is within the above range, there is an effect of improving gloss characteristics and hardness of the coating film.
- the glass transition temperature of the acrylic resin is less than the above range, the drying rate of the clear coat composition is delayed, resulting in poor solvent resistance and chipping resistance of the prepared coating film. may be lacking in appearance characteristics and hardness.
- the acrylic resin may have a solid content (NV) of 40 to 60% by weight, or 45 to 55% by weight based on the total weight of the resin.
- NV solid content
- storage stability of the resin and storage stability of the clear coat composition may be improved and workability may be excellent.
- the solid content of the acrylic resin is less than the above range, the viscosity is too low, resulting in poor workability of the clear coat composition containing the same. Aggregation may occur over time.
- the acrylic resin may be included in an amount of 3 to 20% by weight, or 5 to 15% by weight based on the total weight of the clear coat composition.
- the acrylic resin is included within the above content range, there is an effect of improving the flowability of the clear coat composition.
- the content of the acrylic resin is less than the above range, the drying property is lowered and the flowability of the clear coat composition including the acrylic resin is insufficient, resulting in poor workability. , the coating flowability is lowered and the viscosity of the clear coat composition is increased, so storage stability and appearance may be lowered.
- the clear coat composition according to one aspect of the present invention may include an acrylic silane resin and an acrylic resin in a weight ratio of 3:1 to 7:1, or 4:1 to 6:1.
- the mixed weight ratio of the acrylic silane resin and the acrylic resin is within the above range, there is an effect of improving durability and appearance characteristics of the produced coating film.
- the mixed weight ratio of the acrylic silane resin and the acrylic resin is less than the above range, that is, when a small amount of the acrylic silane resin is included based on the acrylic resin, the drying property is lowered, resulting in a clear coat composition comprising the same.
- a clear coat composition according to one aspect of the present invention may include a solvent.
- the solvent serves to control the viscosity of the composition, improve drying properties, and improve the appearance characteristics and spreadability of the prepared coating film.
- the solvent is not particularly limited as long as it is commonly used in the clear coat composition, and may include, for example, at least one selected from the group consisting of aromatic hydrocarbon-based solvents, acetate-based solvents, alcohol-based solvents, and propionate-based solvents. there is.
- the solvent is an aromatic hydrocarbon-based solvent such as toluene, xylene, and xylene; 1-methoxy-2-propylacetate, methylacetate, ethylacetate, n-propylacetate, n-butylacetate, methyl glutarate, methyl succinate, methyl adipate, dimethyl glutarate, dimethyl succinate, dimethyl adipate
- Acetate solvents such as a paste, propylene glycol methyl ether acetate (PMA), butyl carbitol acetate, and butyl cellosolve acetate; alcohol solvents such as n-butanol, propanol, 1-methoxy-2-propanol, and 2-butoxyethanol; ketone solvents such as acetone, methyl ethyl ketone, methyl butyl ketone, and methyl isobutyl ketone; and propionate-based solvents such as ethyl ethoxy propionat
- the solvent may be included in the composition in an amount of 5 to 40% by weight, or 10 to 35% by weight based on the total weight of the clear coat composition.
- the solvent is included within the above range, there is an effect of improving workability and drying property by appropriately adjusting the viscosity of the composition.
- the content of the solvent in the clear coat composition is less than the above range, the solid content in the composition is high, resulting in poor workability of the composition. Problems with poor appearance and adhesion of the coated film may occur.
- the clear coat composition according to one aspect of the present invention may further include additives such as a light stabilizer, an acid catalyst, a moisture absorbent, a curing catalyst, a UV absorber, and a surface leveling agent.
- additives such as a light stabilizer, an acid catalyst, a moisture absorbent, a curing catalyst, a UV absorber, and a surface leveling agent.
- Additives are not particularly limited as long as they can be added to the clear coat composition in general.
- Light stabilizers play a role in absorbing ultraviolet rays and suppress radical chain reactions caused by ultraviolet rays
- acid catalysts play a role in accelerating the reaction and controlling the curing speed
- surface leveling agents play a role in improving appearance characteristics such as smoothness.
- the absorbent absorbs moisture and serves to improve storage properties.
- the content of the additive is not particularly limited as long as it can be generally included in the clear coat composition.
- the additive may be included in the composition in an amount of 1 to 15% by weight, or 1.5 to 12% by weight, or 1.7 to 11% by weight based on the total weight of the clear coat composition.
- a clear coat composition according to one aspect of the present invention may be a one-component type containing a main part and a curing agent part.
- the clear coat composition of the present invention may have a solids content of 50 to 60% by weight, or 52 to 58% by weight.
- the solid content of the clear coat composition of the present invention is within the above range, there is an advantage in that the painting workability of the composition becomes appropriate.
- the solid content of the clear coat composition of the present invention is less than the above range, curing reactivity is reduced due to the decrease in solid content, and when the solid content is above the above range, the workability of the clear coat composition is reduced due to the high solid content.
- the clear coat composition of the present invention may have a viscosity of 38 to 52 seconds, 40 to 50 seconds, or 42 to 48 seconds based on Ford Cup No. 4. If the viscosity of the clear coat composition of the present invention is less than the above range, problems such as dripping down the vertical surface may occur, and if the viscosity is above the above range, the viscosity of the composition is high, deteriorating the appearance characteristics of the coating film prepared therefrom or increasing the load on the paint machine. It may get caught and cause damage to the sprayer.
- the clear coat composition according to the present invention includes a low molecular weight and high functional polyester resin and a low molecular weight silane-modified polyisocyanate resin to improve the crosslinking density of the final coating film while imparting flexibility and elasticity, thereby providing scratch resistance and durability.
- This excellent coating film can be manufactured.
- the coating film prepared from the clear coat composition of the present invention has excellent weather resistance, no deterioration in appearance properties, particularly gloss, and excellent scratch resistance and chipping resistance even after long-term driving or outdoor exposure.
- Acrylic silane resin, polyester resin, urethane oligomer, silane-modified polyisocyanate resin, melamine resin, acrylic resin, additives and solvents were mixed in the contents shown in [Table 1] to [Table 3], and 46 based on Ford Cup No. 4 A clear coat composition having a viscosity of candle was prepared.
- a primer coating material (manufacturer: KCC, product name: FU2300) was applied to the specimen and cured at 140° C. for 20 minutes to form a primer coating film having a thickness of 40 ⁇ m.
- a base coat (manufacturer: KCC, product name: WT3060) is applied by bell spray on the primer film, and hot air is blown at 80 ° C for 3 minutes to evaporate the remaining water in the paint to form a base film with a thickness of 15 ⁇ m. formed.
- the clear coat composition prepared in Examples and Comparative Examples was coated on the base coating film and cured at 140° C. for 25 minutes to form a clear coating film having a thickness of 40 ⁇ m to prepare a final coating film.
- the physical properties of the specimens were measured in the following manner, and the results are presented in [Table 5] to [Table 7].
- the clear coating film uses a hand gun spray (nozzle aperture: 1.5 mm, air pressure: maintained constant around 45 kgf/cm 2 ), and maintains a constant distance between the nozzle inlet and the specimen at 30 cm, while maintaining a constant 45 cm/cm It was painted while moving at the speed of sec.
- CF was measured and calculated horizontally and vertically. Horizontal/vertical value of CF. CF is 77 or more/73 or more excellent ( ⁇ ), 75 or more and less than 77/70 or more and less than 73 is good ( ⁇ ), 72 or more and less than 75/67 or more and less than 70 is average ( ⁇ ) , less than 72/67 were evaluated as defective (x).
- gloss retention rate (%) was 80% or more, it was evaluated as excellent ( ⁇ ), 70% or more and less than 80% as good ( ⁇ ), 60% or more and less than 70% as normal ( ⁇ ), and less than 60% as poor ( ⁇ ). .
- gloss retention rate (%) was 65% or more, it was evaluated as excellent ( ⁇ ), 55% or more and less than 65% as good ( ⁇ ), 40% or more and less than 55% as normal ( ⁇ ), and less than 40% as poor ( ⁇ ). .
- the gloss was 91% or more, it was evaluated as excellent ( ⁇ ), 89% or more and less than 91% as good ( ⁇ ), 87% or more and less than 89% as normal ( ⁇ ), and less than 87% as poor ( ⁇ ). .
- the damaged part of the final coating film if there are 10 or less damages of 1 mm or less, excellent ( ⁇ ), if there are 10 or less damages of more than 1 mm and less than 2 mm, good ( ⁇ ), and damages of 2 mm or more and less than 3 mm 10 or less were evaluated as normal ( ⁇ ), and damages of 2 mm or more and less than 3 mm were evaluated as defective ( ⁇ ) if more than 10 damages.
- the hardness of the clear coating film was measured by the pencil hardness method. Specifically, the maximum hardness without damaging the clear coating film was measured using pencils of 3B, 2B, B, HB, F, H, and 2H, respectively.
- the impact resistance of the final coating film was evaluated according to ASTM D2794.
- a DuPont impact tester was used, and the appearance of the coating film was observed when a 500g weight was dropped on the specimen while changing the drop height of the weight from 30cm to 50cm.
- the final coating film was immersed in a constant temperature water bath at 40° C. for 240 hours, left at room temperature for 1 hour, and then adhesion was evaluated by a checkerboard method, and discoloration was visually confirmed.
- the squares were removed using a tape to measure adhesion.
- the measured adhesion is excellent ( ⁇ ) when 100 squares are fully attached ( ⁇ ), good ( ⁇ ) when the remaining squares are 70% or more and less than 100%, normal ( ⁇ ), 50% when 50% or more and less than 70% If less than, it was evaluated as defective ( ⁇ ).
- the measurement result was evaluated as excellent ( ⁇ ) if it was 10 minutes or more, good ( ⁇ ) if it was 7 minutes or more and less than 10 minutes, average ( ⁇ ) if it was 5 minutes or more and less than 7 minutes, and poor ( ⁇ ) if it was 5 minutes or less.
- the final coating film was tested for gloss retention (20 ⁇ gloss), adhesion, and color difference (X-Rite MA98) before and after 1,000 hours of exposure to WOM, an accelerated weather resistance tester.
- the check mark method of item (8) was used for adhesion. If the remaining squares are 100%, the gloss retention is 97% or more, and the color difference value ( ⁇ E) is 0.5 or less, it is excellent ( ⁇ ), and the remaining squares are 100% and glossy. If the retention rate is 93% or more and less than 97% and the color difference value ( ⁇ E) is 1.0 or less, it is good ( ⁇ ). Normal ( ⁇ ), if the remaining squares were 10% or more and less than 100%, the gloss retention was less than 90%, and the color difference value ( ⁇ E) was more than 1.0, it was evaluated as defective ( ⁇ ).
- an acrylic silane resin a polyester resin, a urethane oligomer, a silane-modified polyisocyanate resin, a melamine resin, and an acrylic resin
- the polyester resin has a hydroxyl value (OHv) of 250 to 400 mgKOH/g, and a number average
- a clear coat composition having a molecular weight (Mn) of 350 to 600 g/mol, and a number average molecular weight (Mn) of the silane-modified polyisocyanate resin of 1,000 to 4,000 g/mol.
- the acrylic silane resin has a weight average molecular weight (Mw) of 7,000 to 9,000 g/mol, a hydroxyl value (OHv) of 70 to 100 mgKOH/g, and a glass transition temperature (Tg) of 30 to 50 ° C. coat composition.
- a clear coat composition wherein the urethane oligomer has a number average molecular weight (Mn) of 700 to 1,300 g/mol and a glass transition temperature of -10 to -30°C.
- the acrylic resin has a weight average molecular weight (Mw) of 6,000 to 9,000 g/mol, a hydroxyl value (OHv) of 110 to 200 mgKOH/g, and a glass transition temperature (Tg) of 0.5 to 10° C., a clear coat. composition.
Abstract
The present invention relates to a clear coat composition comprising an acrylic silane resin, a polyester resin, a urethane oligomer, a silane-modified polyisocyanate resin, a melamine resin, and an acrylic resin, wherein the polyester resin has a hydroxyl value (OHv) of 250-400 mgKOH/g and a number average molecular weight (Mn) of 350-600 g/mol, and the silane-modified polyisocyanate resin has a number average molecular weight (Mn) of 1,000-4,000 g/mol.
Description
본 발명은 클리어 코트 조성물에 관한 것으로, 더욱 상세하게는 제조된 도막의 외관 특성, 내스크래치성 및 내후성이 우수한 클리어 코트 조성물에 관한 것이다.The present invention relates to a clear coat composition, and more particularly, to a clear coat composition having excellent external appearance properties, scratch resistance and weather resistance of a produced coating film.
여기서는 본 개시에 관한 배경기술이 제공되며, 이들이 반드시 공지기술을 의미하는 것은 아니다.BACKGROUND OF THE INVENTION Relating to the present disclosure is provided herein, and is not necessarily meant to be prior art.
자동차 차체의 외관 특성을 향상시키고 외부 환경으로부터 표면을 보호하기 위하여 자동차 도장 시스템은 전착 도장, 중도 도장, 베이스 도장, 및 클리어 도장 등의 복수 코팅 공정이 수행된다.In order to improve the exterior characteristics of an automobile body and protect the surface from the external environment, a plurality of coating processes such as electrodeposition painting, intermediate painting, base painting, and clear painting are performed in the automobile painting system.
한편, 자동세차기의 폭넓은 보급으로 세차를 좀더 편리하고 빠르게 진행할 수 있게 되었다. 그러나, 자동세차기를 이용한 세차 중 세차기 브러쉬와 흙먼지에 의해 클리어 도막에 스크래치가 발생하여 차량 표면의 광택이 저하되고 외관이 불량해지는 문제가 있었다. 또한, 주행 중이나 옥외 폭로시 태양광의 자외선과 기후에 노출되어 도막이 노화됨으로써, 클리어 도막의 내후성이 저하되고 표면에 스크래치가 발생하는 등의 외관 특성이 저하되는 문제가 있었다. 이에, 최근 자동차 클리어 코트 조성물 업계에서는 고외관 및 고내구성 클리어 코트 조성물에 대한 요구가 증가하고 있다.On the other hand, with the wide distribution of automatic car wash machines, car washing can be performed more conveniently and quickly. However, scratches occur on the clear coating film due to the car wash brush and soil dust during car washing using the automatic car wash, resulting in a decrease in gloss of the vehicle surface and a poor appearance. In addition, as the coating film is exposed to ultraviolet rays of sunlight and weather during driving or outdoor exposure, there is a problem in that the weather resistance of the clear coating film deteriorates and the appearance characteristics such as scratches occur on the surface. Accordingly, the demand for high-appearance and high-durability clear coat compositions has recently increased in the automotive clear coat composition industry.
이와 관련하여, 종래 기술은 아크릴 수지와 멜라민 수지의 주반응 구조에 블록 이소시아네이트 수지를 추가하여 도막의 유연성을 부여함으로써 초기 내스크래치성을 확보하였다. 구체적으로, 한국 등록특허 제10-1115869호는 아크릴 수지, 멜라민 수지, 실란 변성 블록이소시아네이트 수지, 흐름성 조정 수지 등을 포함하는 내스크래치성 향상 자동차용 일액형 클리어 코트 조성물을 개시하고 있다. 그러나 이러한 종래 기술은 최종 도막의 가교 밀도를 저하시켜 장기 내후성 및 내스크래치성이 저하되는 문제점이 있다.In this regard, the prior art secures initial scratch resistance by adding a block isocyanate resin to the main reaction structure of an acrylic resin and a melamine resin to impart flexibility to the coating film. Specifically, Korean Patent Registration No. 10-1115869 discloses a one-component clear coat composition for automobiles containing an acrylic resin, a melamine resin, a silane-modified blocked isocyanate resin, and a flowability adjusting resin. However, this prior art has a problem in that long-term weather resistance and scratch resistance are deteriorated by lowering the crosslinking density of the final coating film.
따라서 기존 자동차용 클리어 코트의 주행 후 또는 옥외 폭로 후 외관과 광택, 내후성, 내스래치성 저하 등의 문제를 개선할 수 있는 클리어 코트 개발이 요구된다.Therefore, there is a need to develop a clear coat capable of improving problems such as deterioration in appearance, gloss, weather resistance, and scratch resistance after driving or outdoor exposure of existing clear coats for automobiles.
본 발명은 하나의 양상에서, 최종 도막의 가교밀도를 향상시킴과 동시에 유연성과 탄성을 부여하여 생산 초기 차량의 외관과 내스크래치성 뿐만 아니라 장기 주행 후 또는 옥외 폭로 후에도 외관과 광택, 내스크래치성, 내후성, 내치핑성 성능이 유지될 수 있는 클리어 코트 조성물을 제공하는 것을 목적으로 한다.In one aspect, the present invention improves the crosslinking density of the final coating film and at the same time imparts flexibility and elasticity to the appearance and scratch resistance of the vehicle at the beginning of production, as well as the appearance and gloss, scratch resistance after long-term driving or outdoor exposure, It is an object of the present invention to provide a clear coat composition capable of maintaining weather resistance and chipping resistance.
본 발명은 하나의 양상에서, 아크릴실란 수지, 폴리에스터 수지, 우레탄 올리고머, 실란 변성 폴리이소시아네이트 수지, 멜라민 수지, 및 아크릴 수지를 포함하며, 폴리에스터 수지는 수산기가(OHv)가 250 내지 400 mgKOH/g이고, 수평균분자량(Mn)이 350 내지 600 g/mol이며, 실란 변성 폴리이소시아네이트 수지는 수평균분자량(Mn)이 1,000 내지 4,000 g/mol인, 클리어 코트 조성물을 제공한다.In one aspect, the present invention includes an acrylic silane resin, a polyester resin, a urethane oligomer, a silane-modified polyisocyanate resin, a melamine resin, and an acrylic resin, wherein the polyester resin has a hydroxyl value (OHv) of 250 to 400 mgKOH/ g, a number average molecular weight (Mn) of 350 to 600 g/mol, and the silane-modified polyisocyanate resin has a number average molecular weight (Mn) of 1,000 to 4,000 g/mol.
본 발명의 하나의 양상에 따르는 클리어 코트 조성물은 최종 도막의 가교밀도를 향상시킴과 동시에 유연성과 탄성을 부여함으로써, 생산 초기 차량의 외관과 내스크래치성 뿐만 아니라 장기 주행 후 또는 옥외 폭로 후에도 외관과 광택, 내스크래치성, 내후성, 내치핑성 성능을 유지할 수 있는 도막을 형성할 수 있다.The clear coat composition according to one aspect of the present invention improves the crosslinking density of the final coating film and at the same time imparts flexibility and elasticity, so that not only the appearance and scratch resistance of the vehicle at the beginning of production, but also the appearance and gloss after long-term driving or outdoor exposure , it is possible to form a coating film capable of maintaining scratch resistance, weather resistance, and chipping resistance performance.
이하 본 발명을 상세하게 설명한다.Hereinafter, the present invention will be described in detail.
본 명세서에서 "중량평균분자량(Mw)" 및 "수평균분자량(Mn)"은 본 발명이 속하는 기술분야에서 통상적으로 알려진 방법에 의해 측정된 것이며, 예를 들어 GPC(gel permeation chromatograph) 등의 방법으로 측정할 수 있다.In the present specification, "weight average molecular weight (Mw)" and "number average molecular weight (Mn)" are measured by a method commonly known in the art to which the present invention belongs, for example, a method such as gel permeation chromatograph (GPC) can be measured with
본 명세서에서 "유리전이온도(Tg)"는 본 발명이 속하는 기술분야에서 통상적으로 알려진 방법에 의해 측정된 것이며, 예컨대 시차주사열량분석법(differential scann ing calorimetry, DSC) 등으로 측정할 수 있다.In the present specification, "glass transition temperature (Tg)" is measured by a method commonly known in the art to which the present invention pertains, and can be measured by, for example, differential scanning calorimetry (DSC).
본 명세서에서 "산가(Av)" 및 "수산기가(OHv)"와 같은 작용기가는 본 발명이 속하는 기술분야에서 통상적으로 알려진 방법에 의해 측정된 것이며, 예를 들어 적정(titration) 등의 방법으로 측정될 수 있다.In the present specification, functional groups such as "acid value (Av)" and "hydroxyl value (OHv)" are measured by a method commonly known in the art to which the present invention belongs, for example, measured by a method such as titration. It can be.
본 명세서에서 "(메트)아크릴"은 "아크릴" 및/또는 "메타크릴"을 의미하고, "(메트)아크릴레이트"는 "아크릴레이트" 및/또는 "메타크릴레이트"를 의미한다.In this specification, "(meth)acryl" means "acryl" and/or "methacryl", and "(meth)acrylate" means "acrylate" and/or "methacrylate".
본 명세서에서 "중량부"는 각 성분 간의 중량의 비율을 의미한다.In this specification, "parts by weight" means the ratio of the weight between each component.
본 발명의 하나의 양상에 따르는 클리어 코트 조성물은 아크릴실란 수지, 폴리에스터 수지, 우레탄 올리고머, 실란 변성 폴리이소시아네이트 수지, 멜라민 수지, 및 아크릴 수지를 포함할 수 있다.A clear coat composition according to one aspect of the present invention may include an acrylic silane resin, a polyester resin, a urethane oligomer, a silane-modified polyisocyanate resin, a melamine resin, and an acrylic resin.
<아크릴실란 수지><Acrylic silane resin>
아크릴실란 수지는 이를 포함하는 클리어 코트 조성물로부터 제조된 도막의 내구성 및 광택과 같은 외관 특성을 향상시키는 역할을 한다.The acrylsilane resin serves to improve appearance properties such as durability and gloss of a coating film prepared from a clear coat composition containing the same.
아크릴실란 수지는 실란 변성 아크릴 수지를 의미하며, 공지된 방법에 따라 직접 합성된 것을 사용하거나, 시판되는 제품을 사용할 수 있다. 예를 들어, 아크릴실란 수지는 제1 비닐계 단량체와 제1(메트)아크릴레이트계 단량체 중 1종 이상으로부터 제조된 아크릴 수지를 실란 단량체로 변성한 것일 수 있다.The acrylsilane resin refers to a silane-modified acrylic resin, and directly synthesized according to a known method may be used, or a commercially available product may be used. For example, the acrylsilane resin may be obtained by modifying an acrylic resin prepared from at least one of the first vinyl-based monomer and the first (meth)acrylate-based monomer with a silane monomer.
제1 비닐계 단량체는 예컨대 스티렌, 메틸스티렌, 디메틸스티렌, 플루오로스티렌, 에톡시스티렌, 메톡시스티렌, 페닐렌 비닐 케톤, 비닐 t-부틸 벤조에이트, 비닐 사이클로헥사노에이트, 비닐 아세테이트, 비닐 피롤리돈, 비닐 클로라이드, 비닐 알코올, 아세톡시스티렌, t-부틸스티렌 및 비닐톨루엔으로 이루어진 군으로부터 선택된 l종 이상일 수 있으며, 여기에 한정되는 것은 아니다.The first vinyl monomer is, for example, styrene, methylstyrene, dimethylstyrene, fluorostyrene, ethoxystyrene, methoxystyrene, phenylene vinyl ketone, vinyl t-butyl benzoate, vinyl cyclohexanoate, vinyl acetate, vinyl vinyl It may be at least one selected from the group consisting of rolidone, vinyl chloride, vinyl alcohol, acetoxy styrene, t-butyl styrene and vinyl toluene, but is not limited thereto.
제1(메트)아크릴레이트 단량체는 하이드록시기 미함유(메트)아크릴레이트 단량체 및 하이드록시기 함유(메트)아크릴레이트 단량체로 이루어진 군으로부터 선택된 l종 이상을 포함할 수 있다.The first (meth)acrylate monomer may include at least one selected from the group consisting of a hydroxyl group-free (meth)acrylate monomer and a hydroxyl group-containing (meth)acrylate monomer.
하이드록시기 미함유(메트)아크릴레이트 단량체는 예컨대(메트)아크릴산, 메틸(메트)아크릴산, (메트)아크릴레이트, 메틸(메트)아크릴레이트, 에틸(메트)아크릴레이트, 프로필(메트)아크릴레이트, 이소프로필(메트)아크릴레이트, 부틸(메트)아크릴레이트, 이소부틸(메트)아크릴레이트, t-부틸(메트)아크릴레이트, 펜틸(메트)아크릴레이트, 헥실(메트)아크릴레이트, 헵틸(메트)아크릴레이트, 이소옥틸(메트)아크릴레이트, 옥틸(메트)아크릴레이트, 2-에틸헥실(메트)아크릴레이트, 이소데실(메트)아크릴레이트, 데실(메트)아크릴레이트, 도데실(메트)아크릴레이트, 이소보닐(메트)아크릴레이트 및 라우릴(메트)아크릴레이트로 이루어진 군으로부터 선택된 l종 이상을 포함할 수 있다.(meth)acrylate monomers without a hydroxy group include, for example, (meth)acrylic acid, methyl (meth)acrylic acid, (meth)acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate , isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate )Acrylate, isooctyl (meth)acrylate, octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, isodecyl (meth)acrylate, decyl (meth)acrylate, dodecyl (meth)acrylate It may contain one or more species selected from the group consisting of lactate, isobornyl (meth) acrylate, and lauryl (meth) acrylate.
하이드록시기 함유(메트)아크릴레이트 단량체는 예컨대 하이드록시알킬 함유(메트)아크릴레이트일 수 있으며, 구체적으로 2-하이드록시 메틸(메트)아크릴레이트, 2-하이드록시 에틸(메트)아크릴레이트, 2-하이드록시 프로필(메트)아크릴레이트 및 2-하이드록시 부틸(메트)아크릴레이트로 이루어진 군으로부터 선택된 l종 이상을 포함할 수 있다.The hydroxyl group-containing (meth)acrylate monomer may be, for example, a hydroxyalkyl-containing (meth)acrylate, specifically 2-hydroxymethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2 - It may contain at least one selected from the group consisting of hydroxypropyl (meth)acrylate and 2-hydroxybutyl (meth)acrylate.
실란 단량체는 알콕시기 함유 실란 단량체일 수 있다. 실란 단량체는 예컨대 감마-글리시독시프로필 트리에톡시 실란, 감마-글리시독시프로필 트리메톡시 실란, 감마-글리시독시프로필 메틸디에톡시 실란, 감마-글리시독시프로필 트리에톡시 실란, 3-머캅토프로필 트리메톡시 실란, 비닐트리메톡시실란, 비닐트리에톡시 실란, 감마-메타크릴록시프로필 트리메톡시 실란, 감마-메타크릴록시 프로필 트리에톡시 실란, 감마-아미노프로필 트리메톡시 실란, 감마-아미노프로필 트리에톡시 실란, 3-이소시아네이토 프로필 트리에톡시 실란, 감마-아세토아세테이트프로필 트리메톡시실란, 감마-아세토아세테이트프로필 트리에톡시 실란, 베타-시아노아세틸 트리메톡시 실란, 베타-시아노아세틸 트리에톡시 실란, 아세톡시아세토 트리메톡시 실란 등일 수 있다.The silane monomer may be a silane monomer containing an alkoxy group. Silane monomers such as gamma-glycidoxypropyl triethoxy silane, gamma-glycidoxypropyl trimethoxy silane, gamma-glycidoxypropyl methyldiethoxy silane, gamma-glycidoxypropyl triethoxy silane, 3- Mercaptopropyl trimethoxy silane, vinyltrimethoxysilane, vinyltriethoxy silane, gamma-methacryloxypropyl trimethoxy silane, gamma-methacryloxy propyl triethoxy silane, gamma-aminopropyl trimethoxy silane , gamma-aminopropyl triethoxy silane, 3-isocyanato propyl triethoxy silane, gamma-acetoacetate propyl trimethoxysilane, gamma-acetoacetate propyl triethoxy silane, beta-cyanoacetyl trimethoxy silane, beta-cyanoacetyl triethoxy silane, acetoxyaceto trimethoxy silane, and the like.
아크릴실란 수지는 예를 들어 라디칼 중합법을 이용하여 아크릴 수지를 제조한 후 실란 변성된 것일 수 있으며, 개시제 및 중합 시간에 따라 물성, 즉 중량평균분자량(Mw), 수산기가(OHv), 산가(Av) 등을 조절할 수 있다.The acrylic silane resin may be, for example, silane-modified after preparing an acrylic resin using a radical polymerization method, and depending on the initiator and polymerization time, physical properties, that is, weight average molecular weight (Mw), hydroxyl value (OHv), acid value ( Av) can be adjusted.
아크릴실란 수지는 중량평균분자량(Mw)이 7,000 내지 9,000 g/mol, 7,500 내지 8,500 g/mol, 또는 7,800 내지 8,200 g/mol일 수 있다. 아크릴실란 수지의 중량평균분자량이 상기 범위 내일 경우, 제조된 도막의 내구성 및 내후성 등의 장기 물성이 우수할 수 있다. 아크릴실란 수지의 중량평균분자량이 상기 범위 미만인 경우 분자량이 작아 제조된 도막의 내후성, 내스크래치성이 부족해지고, 상기 범위 초과인 경우 분자량 증가에 따른 흐름성이 저하되어 이를 포함하는 클리어 코트 조성물의 작업성이 불량해지고 표면평활성이 좋지 않아 우수한 외관을 갖는 도막을 제조하기 어려운 문제가 발생할 수 있다.The acrylsilane resin may have a weight average molecular weight (Mw) of 7,000 to 9,000 g/mol, 7,500 to 8,500 g/mol, or 7,800 to 8,200 g/mol. When the weight average molecular weight of the acrylic silane resin is within the above range, long-term physical properties such as durability and weather resistance of the produced coating film may be excellent. When the weight average molecular weight of the acrylic silane resin is less than the above range, the molecular weight is small, resulting in poor weatherability and scratch resistance of the prepared coating film, and when it exceeds the above range, the flowability is lowered due to the increase in molecular weight, so the work of the clear coat composition including it Due to poor properties and poor surface smoothness, it is difficult to manufacture a coating film having an excellent appearance.
아크릴실란 수지는 수산기가(OHv)가 70 내지 100 mgKOH/g, 또는 75 내지 95 mgKOH/g일 수 있다. 아크릴실란 수지의 수산기가가 상기 범위 내일 경우, 도막의 내구성 및 내후성 개선 효과가 있다. 아크릴실란 수지의 수산기가가 상기 범위 미만인 경우 경화제와의 가교 반응에 의한 도막 형성이 불충분하여 도막의 경도 등의 기계적 물성이 저하되고, 상기 범위 초과인 경우 과경화되어 도막이 브리틀(brittle)해져 탄성이 떨어지고, 제조된 도막의 외관 특성이 부족한 문제가 발생할 수 있다.The acrylsilane resin may have a hydroxyl value (OHv) of 70 to 100 mgKOH/g or 75 to 95 mgKOH/g. When the hydroxyl value of the acrylic silane resin is within the above range, durability and weather resistance of the coating film are improved. When the hydroxyl value of the acrylic silane resin is less than the above range, the formation of a coating film by a crosslinking reaction with the curing agent is insufficient, and mechanical properties such as hardness of the coating film are lowered. This may cause a problem in that the appearance properties of the produced coating film are insufficient.
아크릴실란 수지는 산가(Av)가 5 mgKOH/g 이하, 또는 0.1 내지 5 mgKOH/g일 수 있다. 아크릴실란 수지의 산가가 상기 범위 내일 경우 이를 포함하는 조성물의 반응성을 조절하여 이로부터 제조된 도막의 외관 특성을 향상시킬 수 있다. 아크릴실란 수지의 산가가 상기 범위 미만인 경우 경화반응 속도가 저하되어 제조된 도막의 외관이 저하되는 문제가 발생하고, 상기 범위 초과인 경우 수지 응집성 증대로 조성물의 점도가 증가하여 작업성 및 상온저장성이 저하되는 문제가 발생할 수 있다.The acrylsilane resin may have an acid value (Av) of 5 mgKOH/g or less, or 0.1 to 5 mgKOH/g. When the acid value of the acrylsilane resin is within the above range, the reactivity of the composition containing the acrylic silane resin may be adjusted to improve the appearance characteristics of the coating film prepared therefrom. When the acid value of the acrylic silane resin is less than the above range, the curing reaction rate is lowered, resulting in a problem of deteriorating the appearance of the produced coating film. degradation may occur.
아크릴실란 수지는 유리 전이온도(Tg)가 30 내지 50℃, 또는 35 내지 45℃일 수 있다. 아크릴실란 수지의 유리전이온도가 상기 범위 내일 경우, 도막의 경도 및 내용제성이 향상되는 효과가 있다. 아크릴실란 수지의 유리전이온도가 상기 범위 미만인 경우 도막의 건조 속도 및 가교밀도가 저하되어 제조된 도막의 경도 및 내용제성이 부족해지는 문제가 있고, 상기 범위 초과인 경우 도막이 브리틀(brittle)해져 제조된 도막의 외관 특성 및 내치핑성이 부족해질 수 있다.The acrylsilane resin may have a glass transition temperature (Tg) of 30 to 50°C or 35 to 45°C. When the glass transition temperature of the acrylic silane resin is within the above range, there is an effect of improving the hardness and solvent resistance of the coating film. When the glass transition temperature of the acrylic silane resin is less than the above range, the drying speed and crosslinking density of the coating film are lowered, resulting in insufficient hardness and solvent resistance of the produced coating film. The appearance characteristics and chipping resistance of the coated film may be insufficient.
아크릴실란 수지는 고형분 함량(NV)이 수지 총 중량에 대하여 60 내지 80 중량%, 65 내지 75 중량%, 또는 68 내지 73 중량% 일 수 있다. 아크릴실란 수지의 고형분 함량이 상기 범위 내일 경우, 수지의 저장 안정성 및 클리어 코트 조성물의 저장 안정성이 개선되고 작업성이 우수할 수 있다. 아크릴실란 수지의 고형분 함량이 상기 범위 미만인 경우 점도가 지나치게 낮아져 이를 포함하는 클리어 코트 조성물의 작업성이 부족해지는 문제가 있고, 상기 범위 초과인 경우 아크릴실란 수지의 점도가 지나치게 높아 반응 중 안정성이 떨어지며 분산 안정성이 나빠져 시간이 지나면 응집이 발생할 수 있다.The acrylsilane resin may have a solids content (NV) of 60 to 80% by weight, 65 to 75% by weight, or 68 to 73% by weight based on the total weight of the resin. When the solid content of the acrylsilane resin is within the above range, storage stability of the resin and storage stability of the clear coat composition may be improved and workability may be excellent. When the solid content of the acrylic silane resin is less than the above range, the viscosity is too low, resulting in poor workability of the clear coat composition containing the same. Aggregation may occur over time due to poor stability.
아크릴실란 수지는 클리어 코트 조성물의 총 중량을 기준으로 30 내지 50 중량%, 35 내지 45 중량%, 또는 37 내지 43 중량%의 함량으로 포함될 수 있다. 아크릴실란 수지가 상기 함량 범위 내로 포함되는 경우, 도막의 부착성 및 내구성을 개선하는 효과가 있다. 아크릴실란 수지의 함량이 상기 범위 미만인 경우 건조성이 저하되어 도막의 부착력, 광택 및 내구성이 저하되는 문제가 있고, 상기 범위 초과인 경우 건조가 빨리 진행되어 조성물의 도장 작업성 및 칠흐름성이 부족하여 도막 외관 및 내스크래치성이 저하될 수 있다.The acrylsilane resin may be included in an amount of 30 to 50% by weight, 35 to 45% by weight, or 37 to 43% by weight based on the total weight of the clear coat composition. When the acrylsilane resin is included within the above content range, there is an effect of improving the adhesion and durability of the coating film. If the content of the acrylic silane resin is less than the above range, the drying property is deteriorated, resulting in a decrease in the adhesion, gloss and durability of the coating film. As a result, the appearance of the coating film and scratch resistance may be deteriorated.
<폴리에스터 수지><Polyester resin>
폴리에스터 수지는 도막에 유연성을 부여하고 가교 밀도를 향상시키며 내스크래치성을 향상시키는 역할을 한다.The polyester resin serves to impart flexibility to the coating film, improve crosslinking density, and improve scratch resistance.
폴리에스터 수지는 반복 단위 내에 3 개 이상의 수산기를 포함하는 고관능성 및 저분자량의 수지로서, 고관능성으로 인해 이를 포함하는 클리어 코트 조성물의 반응성 및 가교밀도를 향상시켜 이로부터 제조된 도막의 내구성 및 기계적 물성이 향상되는 효과가 있으며, 고관능성 및 저분자량의 폴리에스터 수지를 포함함으로써, 클리어 코트 조성물에 유연성을 부여하여 평활성과 가교 밀도를 향상시켜 도막의 외관 특성 및 내스크래치성을 향상시키는 효과가 있다.Polyester resin is a high-functionality and low-molecular-weight resin containing three or more hydroxyl groups in a repeating unit. Due to its high functionality, the polyester resin improves the reactivity and crosslinking density of a clear coat composition containing the polyester resin, thereby improving durability and mechanical properties of a coating film prepared therefrom. There is an effect of improving physical properties, and by including a high-functionality and low-molecular-weight polyester resin, flexibility is imparted to the clear coat composition to improve smoothness and crosslinking density, thereby improving the appearance characteristics and scratch resistance of the coating film. .
폴리에스터 수지는 공지된 방법에 따라 직접 합성된 것을 사용하거나, 시판되는 제품을 사용할 수 있다. 폴리에스터 수지는 예컨대 한 분자 내에 2개 이상의 수산기를 갖는 폴리올 단량체와 카르복실기 함유 단량체의 축합반응으로부터 제조될 수 있다. 구체적으로, 폴리에스터 수지는 한 분자 내에 2개의 수산기를 갖는 제1 폴리올 단량체, 한 분자 내에 3개 이상의 수산기를 갖는 제2 폴리올 단량체, 및 카르복실기 함유 단량체로부터 제조된 것일 수 있다.A polyester resin synthesized directly according to a known method may be used, or a commercially available product may be used. The polyester resin can be produced, for example, from a condensation reaction of a polyol monomer having two or more hydroxyl groups in one molecule and a carboxyl group-containing monomer. Specifically, the polyester resin may be prepared from a first polyol monomer having two hydroxyl groups in one molecule, a second polyol monomer having three or more hydroxyl groups in one molecule, and a carboxyl group-containing monomer.
카르복실기 함유 단량체는 예컨대 아디프산(AA), 이소프탈산(IPA), 트리멜리트산 무수물(TMA), 헥사하이드로프탈산 무수물(HHPA), 지환족산, 프탈산 무수물, 이소프탈산, 테레프탈산, 숙신산, 아디프산, 푸마르산, 말레산 무수물, 테트라하이드로프탈산 무수물, 카프로락톤 및 이들의 유도체로 이루어진 군으로부터 선택된 1종 이상일 수 있다.Carboxyl group-containing monomers include, for example, adipic acid (AA), isophthalic acid (IPA), trimellitic anhydride (TMA), hexahydrophthalic anhydride (HHPA), cycloaliphatic acid, phthalic anhydride, isophthalic acid, terephthalic acid, succinic acid, adipic acid , fumaric acid, maleic anhydride, tetrahydrophthalic anhydride, caprolactone, and derivatives thereof.
제1 폴리올 단량체는 한 분자 내에 2개의 수산기를 갖는 것으로, 예컨대 사이클로헥산 디메탄올(CHDM), 폴리에틸렌글리콜, 1,6-헥산디올(1,6-HD), 네오펜틸글리콜(NPG), 에틸렌글리콜, 프로필렌글리콜, 디에틸렌글리콜, 부탄디올, 1,4-헥산디올 및 3-메틸펜탄디올로 이루어진 군으로부터 선택된 l종 이상일 수 있다.The first polyol monomer has two hydroxyl groups in one molecule, such as cyclohexane dimethanol (CHDM), polyethylene glycol, 1,6-hexanediol (1,6-HD), neopentyl glycol (NPG), and ethylene glycol. , propylene glycol, diethylene glycol, butanediol, 1,4-hexanediol and 3-methylpentanediol may be one or more selected from the group consisting of.
제2 폴리올은 한 분자 내에 3개 이상의 수산기를 갖는 것으로, 예컨대 트리메틸올 프로판(TMP), 트리메틸올에탄, 펜타에리스리톨 및 글리세린으로 이루어진 군으로부터 선택된 1종 이상일 수 있다.The second polyol has three or more hydroxyl groups in one molecule, and may be, for example, at least one selected from the group consisting of trimethylol propane (TMP), trimethylolethane, pentaerythritol, and glycerin.
폴리에스터 수지는 산과 알코올의 축합반응을 이용하여 제조된 것일 수 있으며, 산과 알코올의 투입 비율에 따라 물성, 즉 수평균분자량(Mn), 수산기가(OHv), 산가(Av) 등의 물성을 조절할 수 있다.The polyester resin may be manufactured using a condensation reaction between an acid and an alcohol, and physical properties such as number average molecular weight (Mn), hydroxyl value (OHv), and acid value (Av) can be controlled according to the input ratio of acid and alcohol. can
폴리에스터 수지는 수평균분자량(Mn)이 350 내지 600 g/mol, 400 내지 550 g/mol, 또는 450 내지 500 g/mol 일 수 있다. 폴리에스터 수지의 수평균분자량이 상기 범위 내일 경우, 클리어 코트 조성물의 평활성이 향상되고 부드러운(soft) 도막을 형성하여 내스크래치성 및 경도를 향상시키는 효과가 있다. 폴리에스터 수지의 수평균분자량이 상기 범위 미만인 경우 분자량이 작아 제조된 도막의 기계적 물성이 저하되는 문제가 있고, 상기 범위 초과인 경우 분자량 증가에 따른 흐름성이 저하되어 도막이 브리틀(Brittle)해져 평활성이 감소하고 내스크래치성이 저하되는 문제가 발생할 수 있다.The polyester resin may have a number average molecular weight (Mn) of 350 to 600 g/mol, 400 to 550 g/mol, or 450 to 500 g/mol. When the number average molecular weight of the polyester resin is within the above range, smoothness of the clear coat composition is improved and a soft coating film is formed to improve scratch resistance and hardness. If the number average molecular weight of the polyester resin is less than the above range, there is a problem that the molecular weight is small and the mechanical properties of the prepared coating film are deteriorated. This may cause a problem in which scratch resistance is reduced and scratch resistance is reduced.
폴리에스터 수지는 수산기가(OHv)가 250 내지 400 mgKOH/g, 300 내지 350 mgKOH/g, 또는 300 내지 330 mgKOH/g 일 수 있다. 폴리에스터 수지의 수산기가가 상기 범위 내인 경우, 멜라민 수지와의 반응성을 향상시켜 도막의 가교밀도가 증가되어 기계적 물성, 외관 및 내화학성을 향상시키는 효과가 있다. 폴리에스터 수지의 수산기가가 상기 범위 미만인 경우 멜라민 수지와의 반응성이 부족하여 가교 밀도가 부족하여 제조된 도막의 내구성 및 내화학성이 저하되는 문제가 있고, 상기 범위 초과인 경우 과경화되어 도막이 브리틀(brittle)해져 외관 및 내스크래치성이 저하되는 문제가 발생할 수 있다.The polyester resin may have a hydroxyl value (OHv) of 250 to 400 mgKOH/g, 300 to 350 mgKOH/g, or 300 to 330 mgKOH/g. When the hydroxyl value of the polyester resin is within the above range, the reactivity with the melamine resin is improved to increase the crosslinking density of the coating film, thereby improving mechanical properties, appearance and chemical resistance. When the hydroxyl value of the polyester resin is less than the above range, there is a problem in that the durability and chemical resistance of the produced coating film is lowered due to insufficient reactivity with the melamine resin and insufficient crosslinking density, and when it exceeds the above range, the coating film is overcured and brittle (brittle) may cause a problem of deterioration in appearance and scratch resistance.
폴리에스터 수지는 25℃에서의 점도가 800 내지 1,200 cps, 850 내지 1,150 cps, 또는 900 내지 1,100 cps일 수 있다. 폴리에스터 수지의 25℃에서의 점도가 상기 범위 내인 경우, 클리어 코트 조성물의 점도가 적절하여 작업성이 상향되는 효과가 있다. 폴리에스터 수지의 25℃에서의 점도가 상기 범위 미만인 경우 조성물의 점도가 너무 낮아 제조된 도막의 미형성으로 칠흐름성, 부착성 및 내스크래치성이 저하되는 문제가 있고, 상기 범위 초과인 경우 조성물의 작업성이 부족하여 제조된 도막의 외관 특성이 저하되는 문제가 발생할 수 있다.The polyester resin may have a viscosity at 25° C. of 800 to 1,200 cps, 850 to 1,150 cps, or 900 to 1,100 cps. When the viscosity of the polyester resin at 25° C. is within the above range, the viscosity of the clear coat composition is appropriate and workability is improved. If the viscosity of the polyester resin at 25 ° C. is less than the above range, the viscosity of the composition is too low, resulting in poor coating flow, adhesion and scratch resistance due to non-formation of the prepared coating film, and if it exceeds the above range, the composition Due to the lack of workability, a problem of deterioration of the appearance characteristics of the manufactured coating film may occur.
폴리에스터 수지는 클리어 코트 조성물의 총 중량을 기준으로 1 내지 12 중량%, 1 내지 10 중량%, 또는 3 내지 8 중량%의 함량으로 포함될 수 있다. 폴리에스터 수지가 상기 함량 범위 내로 포함되는 경우, 외관 내스크래치성 및 도막 평활성 향상의 효과가 있다. 조성물 내 폴리에스터 수지의 함량이 상기 범위 미만인 경우 가교 밀도가 저하되어 외관 및 내스크래치성이 저하되는 문제가 있고, 상기 범위 초과인 경우 조성물의 점도가 과도하게 높아져 작업성 및 건조성이 저하되어 외관 및 기계적 물성이 저하되는 문제가 발생할 수 있다.The polyester resin may be included in an amount of 1 to 12% by weight, 1 to 10% by weight, or 3 to 8% by weight based on the total weight of the clear coat composition. When the polyester resin is included within the above content range, there is an effect of improving external scratch resistance and smoothness of the coating film. If the content of the polyester resin in the composition is less than the above range, the crosslinking density is lowered, resulting in deterioration in appearance and scratch resistance. And a problem of deterioration of mechanical properties may occur.
<우레탄 올리고머><Urethane Oligomer>
우레탄 올리고머는 이를 포함하는 클리어 코트 조성물로 제조된 도막에 탄성을 부여하고 광택, 평활성 및 내스크래치성을 향상시키는 역할을 한다.The urethane oligomer provides elasticity to a coating film made of a clear coat composition containing the oligomer and serves to improve gloss, smoothness, and scratch resistance.
우레탄 올리고머는 유리전이온도가 낮고 3관능 이상의 고관능성일 수 있다. 우레탄 올리고머가 전술한 바와 같이 유리전이온도가 낮은 경우 부드러운(soft) 도막을 형성하여 외관 및 내스크래치성이 향상되고, 3관능 이상의 고관능성인 경우 이를 포함하는 클리어 코트 조성물의 유연성 및 탄성을 증대시켜 이로부터 제조된 도막의 외관 특성 및 내스크래치성을 향상시키는 효과가 있다.The urethane oligomer may have a low glass transition temperature and high functionality of trifunctional or higher. As described above, when the glass transition temperature of the urethane oligomer is low, a soft coating is formed to improve the appearance and scratch resistance, and when the urethane oligomer has a trifunctional or higher functionality, flexibility and elasticity of a clear coat composition including the oligomer are increased. There is an effect of improving the appearance characteristics and scratch resistance of the coating film prepared therefrom.
우레탄 올리고머는 공지된 방법에 따라 직접 합성된 것을 사용하거나, 시판되는 제품을 사용할 수 있다. 우레탄 올리고머는 예컨대 알코올계 단량체와 한 분자 내에 2개 이상의 이소시아네이트를 포함하는 다관능 이소시아네이트계 단량체로부터 제조될 수 있다.As the urethane oligomer, one synthesized directly according to a known method may be used, or a commercially available product may be used. The urethane oligomer can be prepared from, for example, an alcohol-based monomer and a polyfunctional isocyanate-based monomer containing two or more isocyanates in one molecule.
알코올계 단량체는 예를 들어, 사이클로헥산올, 에틸헥산올, 부탄올, 1,6-헥산디올, 에틸렌 글리콜, 프로필렌 글리콜, 디에틸렌 글리콜, 부틸렌 글리콜, 네오펜틸 글리콜, 트리메틸올 프로판, 부탄디올, 1,4-헥산디올 및 3-메틸펜탄디올로 이루어진 군으로부터 선택된 l종 이상일 수 있다.Alcoholic monomers include, for example, cyclohexanol, ethylhexanol, butanol, 1,6-hexanediol, ethylene glycol, propylene glycol, diethylene glycol, butylene glycol, neopentyl glycol, trimethylol propane, butanediol, 1 It may be at least one selected from the group consisting of ,4-hexanediol and 3-methylpentanediol.
다관능 이소시아네이트계 단량체는 예를 들어, 헥사메틸렌디이소시아네이트(HMDI), 이소포론 디이소시아네이트, 트리메틸렌디이소시아네이트, 테트라메틸렌디이소시아네이트, 펜타메틸렌디이소시아네이트, 프로필렌디이소시아네이트, 에틸렌디이소시아네이트, 2,3-디메틸에틸렌디이소시아네이트, 1-메틸트리메틸렌디이소시아네이트, 1,3-사이클로펜텐디이소시아네이트, 1,4-사이클로펜텐디이소시아네이트, 1,2-사이클로펜텐디이소시아네이트, 1,3-페닐렌디이소시아네이트, 1,4-페닐렌디이소시아네이트, 2,4-톨루엔디이소시아네이트, 2,6-톨루엔디이소시아네이트, 4,4-디페닐프로판디이소시아네이트, 자일렌디이소시아네이트, 1,1,6,6-테트라메틸헥사메틸렌디이소시아네이트, 헥사메틸렌디이소시아네이트 트라이머 및 이소포론 디이소시아네이트 트라이머로 이루어진 군으로부터 선택된 1종 이상일 수 있다.Polyfunctional isocyanate-based monomers include, for example, hexamethylene diisocyanate (HMDI), isophorone diisocyanate, trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, propylene diisocyanate, ethylene diisocyanate, 2,3- Dimethylethylene diisocyanate, 1-methyltrimethylene diisocyanate, 1,3-cyclopentene diisocyanate, 1,4-cyclopentene diisocyanate, 1,2-cyclopentene diisocyanate, 1,3-phenylene diisocyanate, 1, 4-phenylene diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, 4,4-diphenylpropane diisocyanate, xylene diisocyanate, 1,1,6,6-tetramethylhexamethylene diisocyanate , It may be one or more selected from the group consisting of hexamethylene diisocyanate trimer and isophorone diisocyanate trimer.
우레탄 올리고머는 다관능 이소시아네이트계 단량체과 알코올계 단량체의 부가반응을 이용하여 제조된 것일 수 있으며, 반응 비율에 따라 물성, 즉 수평균분자량(Mn), 유리전이온도(Tg) 등의 물성을 조절할 수 있다.The urethane oligomer may be prepared using an addition reaction of a polyfunctional isocyanate-based monomer and an alcohol-based monomer, and physical properties such as number average molecular weight (Mn) and glass transition temperature (Tg) may be adjusted according to the reaction ratio. .
우레탄 올리고머는 미반응 NCO기를 포함하지 않을 수 있다. 미반응 NCO기를 포함하지 않는 우레탄 올리고머를 사용할 경우, 제조된 도막의 외관이 우수한 효과가 있다. The urethane oligomer may not contain unreacted NCO groups. When using a urethane oligomer that does not contain unreacted NCO groups, the appearance of the produced coating film is excellent.
우레탄 올리고머는 수평균분자량(Mn)이 700 내지 1,300 g/mol, 또는 900 내지 1,100 g/mol 일 수 있다. 우레탄 올리고머의 수평균분자량이 상기 범위 내일 경우, 클리어 코트 조성물의 평활성이 향상되고 부드러운(soft) 도막을 형성하여 도막의 광택 및 외관 특성이 우수한 효과가 있다. 우레탄 올리고머의 수평균분자량이 상기 범위 미만인 경우 분자량이 작아 기계적 물성 및 내후성이 저하되는 문제가 있고, 상기 범위 초과인 경우 분자량 증가에 따른 평활성, 흐름성이 저하되어 외관특성이 저하되고 도막이 브리틀(Brittle)해져 내스크래치성이 저하되는 문제가 발생할 수 있다.The urethane oligomer may have a number average molecular weight (Mn) of 700 to 1,300 g/mol or 900 to 1,100 g/mol. When the number average molecular weight of the urethane oligomer is within the above range, the smoothness of the clear coat composition is improved and a soft coating film is formed, so that the coating film has excellent gloss and appearance properties. When the number average molecular weight of the urethane oligomer is less than the above range, the molecular weight is small and mechanical properties and weather resistance are deteriorated. Brittle) may cause a problem of deterioration in scratch resistance.
우레탄 올리고머는 유리전이온도(Tg)가 -10 내지 -30℃, 또는 -15 내지 -25℃일 수 있다. 우레탄 올리고머의 유리전이온도가 상기 범위 내일 경우, 도막의 유연성이 증가하여 도막의 광택 특성 및 내스크래치성이 향상되는 효과가 있다. 우레탄 올리고머의 유리전이온도가 상기 범위 미만인 경우 도막의 탄성이 증가하여 경도가 저하되고 클리어 코트 조성물의 건조성이 열세하여 도막의 외관 특성이 저하되고, 상기 범위 초과인 경우 클리어 코트 조성물의 흐름성 저하로 외관 특성이 저하되고 도막의 탄성이 떨어져 부착성 및 내스크래치성이 저하되는 문제가 발생할 수 있다.The urethane oligomer may have a glass transition temperature (Tg) of -10 to -30 °C or -15 to -25 °C. When the glass transition temperature of the urethane oligomer is within the above range, flexibility of the coating film is increased, thereby improving gloss properties and scratch resistance of the coating film. When the glass transition temperature of the urethane oligomer is less than the above range, the elasticity of the coating film increases and the hardness decreases, and the drying property of the clear coat composition deteriorates, resulting in a decrease in the appearance properties of the coating film. If it exceeds the above range, the flowability of the clear coat composition decreases As a result, the appearance properties are deteriorated and the elasticity of the coating film is lowered, which may cause problems in that adhesion and scratch resistance are deteriorated.
우레탄 올리고머는 고형분 함량이 올리고머 총 중량에 대하여 70 내지 90 중량%, 또는 75 내지 85 중량%일 수 있다. 우레탄 올리고머의 고형분이 상기 범위 내일 경우, 클리어 코트 조성물의 작업성이 향상되는 효과가 있다. 우레탄 올리고머의 고형분 함량이 상기 범위 미만인 경우, 점도가 지나치게 낮아져 흐름성이 저하되고 이를 포함하는 클리어 코트 조성물의 작업성이 부족해지는 문제가 있고, 상기 범위 초과인 경우 점도가 지나치게 높아져 반응 중 안정성이 떨어지며, 분산 안정성이 나빠져 시간이 지나면 클리어 코트 조성물 내 응집물이 발생할 수 있다.The urethane oligomer may have a solids content of 70 to 90% by weight, or 75 to 85% by weight based on the total weight of the oligomer. When the solid content of the urethane oligomer is within the above range, the workability of the clear coat composition is improved. When the solid content of the urethane oligomer is less than the above range, the viscosity is excessively low and the flowability is deteriorated, and the workability of the clear coat composition including the same is insufficient. , Dispersion stability deteriorates, and aggregates may occur in the clear coat composition over time.
우레탄 올리고머는 클리어 코트 조성물의 총 중량을 기준으로 1 내지 15 중량%, 3 내지 12 중량%, 바람직하게는 5 내지 10 중량%의 함량으로 포함될 수 있다. 우레탄 올리고머의 함량이 상기 범위 내일 경우, 제조된 도막의 유연성 및 외관 특성이 우수한 효과가 있다. 클리어 코트 조성물 내 우레탄 올리고머의 함량이 상기 범위 미만인 경우 도막의 가교 밀도가 저하되어 내스크래치성 및 외관이 저하되는 문제가 있고, 상기 범위 초과인 경우 클리어 코트 조성물의 점도가 높아져 작업성이 부족해지고, 건조성이 저하되어 도막의 경도가 저하되는 문제가 발생할 수 있다.The urethane oligomer may be included in an amount of 1 to 15% by weight, 3 to 12% by weight, preferably 5 to 10% by weight based on the total weight of the clear coat composition. When the content of the urethane oligomer is within the above range, flexibility and appearance characteristics of the prepared coating film are excellent. When the content of the urethane oligomer in the clear coat composition is less than the above range, the crosslinking density of the coating film is lowered, resulting in a decrease in scratch resistance and appearance. A problem in that the drying property is lowered and the hardness of the coating film is lowered may occur.
<실란 변성 폴리이소시아네이트 수지><Silane-modified polyisocyanate resin>
실란 변성 폴리이소시아네이트 수지는 도막의 가교밀도, 평활성, 및 내후성 후 내스크래치성을 향상시키는 역할을 한다.The silane-modified polyisocyanate resin serves to improve the crosslinking density, smoothness, and scratch resistance of a coating film after weather resistance.
실란 변성 폴리이소시아네이트 수지는 공지된 방법에 따라 직접 합성된 것을 사용하거나, 시판되는 제품을 사용할 수 있다. As the silane-modified polyisocyanate resin, one synthesized directly according to a known method or a commercially available product may be used.
실란 변성 폴리이소시아네이트 수지는 예를 들어 알코올계 단량체와 이소시아네이트계 화합물 중 1종 이상으로부터 제조된 폴리이소시아네이트 수지를 실란 단량체로 변성한 것일 수 있다. 더욱 구체적으로, 실란 변성 폴리이소시아네이트 수지는 알코올계 단량체와 이소시아네이트계 화합물 중 1종 이상을 반응시켜 프리 NCO(free NCO)기를 갖는 폴리이소시아네이트 수지를 제조하고, 이후 예컨대 아미노실란과 같은 실란 단량체와 반응시켜 실란 변성한 것일 수 있다. 따라서 아미노실란으로 변성된 폴리이소시아네이트 수지는 우레아-우레탄-우레아 구조를 가질 수 있다.The silane-modified polyisocyanate resin may be, for example, a polyisocyanate resin prepared from at least one of an alcohol-based monomer and an isocyanate-based compound modified with a silane monomer. More specifically, the silane-modified polyisocyanate resin is prepared by reacting at least one of an alcohol-based monomer and an isocyanate-based compound to prepare a polyisocyanate resin having a free NCO group, and then reacting with a silane monomer such as aminosilane. It may be silane-modified. Therefore, the polyisocyanate resin modified with aminosilane may have a urea-urethane-urea structure.
실란 변성 폴리이소시아네이트 수지는 또 다른 예로, 이소시아네이트계 화합물을 실란 단량체로 변성한 것일 수 있다. 더욱 구체적으로, 실란 변성 폴리이소시아네이트 수지는 이소시아네이트계 화합물을 아미노실란과 같은 실란 단량체와 반응시켜 실란 변성한 것일 수 있다. 따라서 아미노실란으로 변성된 폴리이소시아네이트 수지는 우레아 구조를 가질 수 있다.As another example, the silane-modified polyisocyanate resin may be obtained by modifying an isocyanate-based compound with a silane monomer. More specifically, the silane-modified polyisocyanate resin may be silane-modified by reacting an isocyanate-based compound with a silane monomer such as aminosilane. Therefore, the polyisocyanate resin modified with aminosilane may have a urea structure.
알코올계 단량체는 예를 들어, 사이클로헥산올, 사이클로헥산디메탄올(CHDM)에틸헥산올, 부탄올, 1,6-헥산디올, 에틸렌 글리콜, 프로필렌 글리콜, 디에틸렌 글리콜, 부틸렌 글리콜, 네오펜틸 글리콜(NPG), 트리메틸올 프로판(TMP), 프로판디올, 부탄디올, 1,4-헥산디올, 3-메틸펜탄디올 및 펜타에리트리톨로 이루어진 군으로부터 선택된 l종 이상일 수 있다.Alcoholic monomers include, for example, cyclohexanol, cyclohexanedimethanol (CHDM) ethylhexanol, butanol, 1,6-hexanediol, ethylene glycol, propylene glycol, diethylene glycol, butylene glycol, neopentyl glycol ( NPG), trimethylol propane (TMP), propanediol, butanediol, 1,4-hexanediol, 3-methylpentanediol, and pentaerythritol.
이소시아네이트계 화합물은 예를 들어, 헥사메틸렌디이소시아네이트(HMDI), 이소포론 디이소시아네이트(IPDI), 트리메틸렌디이소시아네이트, 테트라메틸렌디이소시아네이트, 펜타메틸렌디이소시아네이트, 프로필렌디이소시아네이트, 에틸렌디이소시아네이트, 2,3-디메틸에틸렌디이소시아네이트, 1-메틸트리메틸렌디이소시아네이트, 1,3-사이클로펜텐디이소시아네이트, 1,4-사이클로펜텐디이소시아네이트, 1,2-사이클로펜텐디이소시아네이트, 1,3-페닐렌디이소시아네이트, 1,4-페닐렌디이소시아네이트, 2,4-톨루엔디이소시아네이트, 2,6-톨루엔디이소시아네이트, 메틸렌 디페닐 디이소시아네이트(MDI), 4,4-디페닐프로판디이소시아네이트, 자일렌디이소시아네이트, 테트라메틸자일렌디이소시아네이트(TMXDI), 1,1,6,6-테트라메틸헥사메틸렌디이소시아네이트, 헥사메틸렌디이소시아네이트 트라이머 및 이소포론 디이소시아네이트 트라이머일 수 있는 이소시아네이트계 단량체 및 디이소시아네이트로부터 유도되는 이소시아누레이트, 비우레트, 및 알로파네이트일 수 있는 이소시아네이트 유도체로 이루어진 군으로부터 선택된 1종 이상일 수 있다.Isocyanate-based compounds include, for example, hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), trimethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, propylene diisocyanate, ethylene diisocyanate, 2,3 -Dimethylethylene diisocyanate, 1-methyltrimethylene diisocyanate, 1,3-cyclopentene diisocyanate, 1,4-cyclopentene diisocyanate, 1,2-cyclopentene diisocyanate, 1,3-phenylene diisocyanate, 1 ,4-phenylene diisocyanate, 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, methylene diphenyl diisocyanate (MDI), 4,4-diphenylpropane diisocyanate, xylene diisocyanate, tetramethylxylenedi Isocyanate (TMXDI), 1,1,6,6-tetramethylhexamethylene diisocyanate, isocyanate-based monomers which may be hexamethylene diisocyanate trimer and isophorone diisocyanate trimer, and isocyanurates derived from diisocyanates, biu It may be at least one selected from the group consisting of let, and isocyanate derivatives that may be allophanates.
실란 단량체는 아민기 함유 실란 단량체일 수 있다. 실란 단량체는 예컨대 비스-감마-트리메톡시실릴프로필아민, 비스-감마-트리에톡시실릴프로필아민, 아미노프로필트리에톡시실란, 또는 아미노프로필트리메톡시실란 등일 수 있다.The silane monomer may be an amine group-containing silane monomer. The silane monomer may be, for example, bis-gamma-trimethoxysilylpropylamine, bis-gamma-triethoxysilylpropylamine, aminopropyltriethoxysilane, or aminopropyltrimethoxysilane.
실란 변성 폴리이소시아네이트 수지는 예를 들어 이소시아네이트계 화합물과 알코올계 단량체의 부가반응을 이용하여 폴리이소시아네이트 수지를 제조한 후 예컨대 아미노실란과 같은 실란 단량체로 변성된 것이거나 이소시아네이트계 화합물에 예컨대 아미노실란 같은 실란 단량체로 변성된 것일 수 있으며, 반응 비율에 따라 물성, 즉 수평균분자량(Mn), 유리전이온도(Tg) 등의 물성을 조절할 수 있다.The silane-modified polyisocyanate resin is, for example, a polyisocyanate resin prepared by using an addition reaction of an isocyanate-based compound and an alcohol-based monomer, and then modified with a silane monomer such as aminosilane, or a silane such as aminosilane is added to an isocyanate-based compound. It may be modified into a monomer, and physical properties such as number average molecular weight (Mn) and glass transition temperature (Tg) may be adjusted according to the reaction ratio.
실란 변성 폴리이소시아네이트 수지는 수평균분자량(Mn)이 1,000 내지 4,000 g/mol, 또는 1,500 내지 3,000 g/mol 일 수 있다. 실란 변성 폴리이소시아네이트 수지의 수평균분자량이 상기 범위 내일 경우, 클리어 코트 조성물의 가교밀도와 평활성이 향상되어 이로부터 제조된 도막의 내후성 후 내스크래치성이 우수한 효과가 있다. 실란 변성 폴리이소시아네이트 수지의 수평균분자량이 상기 범위 미만인 경우 분자량이 작아 기계적 물성 및 내후성이 저하되는 문제가 있고, 상기 범위 초과인 경우 분자량 증가에 따른 평활성, 흐름성이 저하되어 외관특성이 저하되고 도막이 브리틀(Brittle)해져 내스크래치성이 저하되는 문제가 발생할 수 있다.The silane-modified polyisocyanate resin may have a number average molecular weight (Mn) of 1,000 to 4,000 g/mol or 1,500 to 3,000 g/mol. When the number average molecular weight of the silane-modified polyisocyanate resin is within the above range, the crosslinking density and smoothness of the clear coat composition are improved, so that the coating film prepared therefrom has excellent weather resistance and scratch resistance. When the number average molecular weight of the silane-modified polyisocyanate resin is less than the above range, the molecular weight is small and mechanical properties and weather resistance are deteriorated. Brittle (Brittle) may cause a problem that the scratch resistance is lowered.
실란 변성 폴리이소시아네이트 수지는 25℃에서의 점도가 400 내지 1,200 cps, 또는 500 내지 1,000 cps일 수 있다. 실란 변성 폴리이소시아네이트 수지의 25℃에서의 점도가 상기 범위 내인 경우, 클리어 코트 조성물의 점도가 적절하여 작업성이 상향되는 효과가 있다. 실란 변성 폴리이소시아네이트 수지의 25℃에서의 점도가 상기 범위 미만인 경우 조성물의 점도가 너무 낮아 제조된 도막의 미형성으로 평활성, 부착성 및 내스크래치성이 저하되는 문제가 있고, 상기 범위 초과인 경우 조성물의 작업성이 부족하여 제조된 도막의 외관 특성이 저하되는 문제가 발생할 수 있다.The silane-modified polyisocyanate resin may have a viscosity of 400 to 1,200 cps or 500 to 1,000 cps at 25°C. When the viscosity of the silane-modified polyisocyanate resin is within the above range, the viscosity of the clear coat composition is appropriate and workability is improved. When the viscosity of the silane-modified polyisocyanate resin at 25° C. is less than the above range, the viscosity of the composition is too low, resulting in poor smoothness, adhesion and scratch resistance due to non-formation of the prepared coating film, and when it exceeds the above range, the composition Due to the lack of workability, a problem of deterioration of the appearance characteristics of the manufactured coating film may occur.
실란 변성 폴리이소시아네이트 수지는 고형분 함량이 수지 총 중량에 대하여 70 내지 90 중량%, 또는 75 내지 85 중량%일 수 있다. 실란 변성 폴리이소시아네이트 수지의 고형분이 상기 범위 내일 경우, 클리어 코트 조성물의 작업성이 향상되는 효과가 있다. 실란 변성 폴리이소시아네이트 수지의 고형분 함량이 상기 범위 미만인 경우, 점도가 지나치게 낮아져 흐름성이 저하되고 이를 포함하는 클리어 코트 조성물의 작업성이 부족해지는 문제가 있고, 상기 범위 초과인 경우 점도가 지나치게 높아져 반응 중 안정성이 떨어지며, 분산 안정성이 나빠져 시간이 지나면 클리어 코트 조성물 내 응집물이 발생할 수 있다.The silane-modified polyisocyanate resin may have a solid content of 70 to 90% by weight or 75 to 85% by weight based on the total weight of the resin. When the solid content of the silane-modified polyisocyanate resin is within the above range, the workability of the clear coat composition is improved. When the solid content of the silane-modified polyisocyanate resin is less than the above range, the viscosity is excessively low, resulting in poor flowability and poor workability of the clear coat composition. Stability is lowered, dispersion stability is deteriorated, and aggregates may be generated in the clear coat composition over time.
실란 변성 폴리이소시아네이트 수지는 수지 내 다수의 Si에 결합된 알콕시 그룹의 개수가 7개 내지 26개, 또는 9 내지 24개일 수 있다.The silane-modified polyisocyanate resin may have 7 to 26 or 9 to 24 alkoxy groups bonded to a plurality of Sis in the resin.
실란 변성 폴리이소시아네이트 수지의 Si에 결합된 알콕시 그룹의 개수가 상기 범위 내일 경우 클리어 코트 조성물의 가교밀도가 향상되어 내후성 및 기계적 물성이 우수한 효과가 있다.When the number of alkoxy groups bonded to Si of the silane-modified polyisocyanate resin is within the above range, the crosslinking density of the clear coat composition is improved, so that weather resistance and mechanical properties are excellent.
실란 변성 폴리이소시아네이트 수지의 알콕시 그룹의 개수가 상기 범위 미만인 경우, 가교 밀도가 저하되어 내후성 및 내스크래치성이 저하되고, 상기 범위 초과인 경우, 반응성 및 건조가 빨리 진행되어 도막의 외관 및 부착성이 저하될 수 있다.When the number of alkoxy groups of the silane-modified polyisocyanate resin is less than the above range, the crosslinking density is lowered and weather resistance and scratch resistance are lowered. may be lowered
실란 변성 폴리이소시아네이트 수지는 클리어 코트 조성물의 총 중량을 기준으로 1 내지 15 중량%, 3 내지 12 중량%, 또는 5 내지 10 중량%의 함량으로 포함될 수 있다. 실란 변성 폴리이소시아네이트 수지가 상기 함량 범위 내로 포함되는 경우, 가교밀도가 향상되어 도막의 부착성 및 내스크래치성을 개선하는 효과가 있다. 실란 변성 폴리이소시아네이트 수지의 함량이 상기 범위 미만인 경우 도막의 탄성이 저하되어 내치핑성 및 내스크래치성이 저하되는 문제가 있고, 상기 범위 초과인 경우 과경화되어 도막이 브리틀(Brittle)해지고 경도 및 내스크래치성이 저하되고, 조성물의 도장 작업성 및 칠흐름성이 부족하여 도막 외관이 저하되는 문제가 발생할 수 있다.The silane-modified polyisocyanate resin may be included in an amount of 1 to 15% by weight, 3 to 12% by weight, or 5 to 10% by weight based on the total weight of the clear coat composition. When the silane-modified polyisocyanate resin is included within the above content range, the crosslinking density is improved, thereby improving adhesion and scratch resistance of the coating film. When the content of the silane-modified polyisocyanate resin is less than the above range, the elasticity of the coating film is lowered, resulting in a decrease in chipping resistance and scratch resistance. A problem in which scratch resistance is reduced and the coating workability and coating flowability of the composition is insufficient may cause a problem in that the appearance of the coating film is deteriorated.
<멜라민 수지><Melamine resin>
멜라민 수지는 경화제로서, 클리어 코트 조성물의 각 성분들과 가교반응하여 조성물을 경화시키고 도막에 경도를 향상시키는 역할을 한다.Melamine resin, as a curing agent, serves to cure the composition by crosslinking with each component of the clear coat composition and improve the hardness of the coating film.
멜라민 수지는 알킬화 멜라민 수지일 수 있으며, 공지된 방법에 따라 직접 합성된 것을 사용하거나 시판되는 제품을 사용할 수 있다. The melamine resin may be an alkylated melamine resin, and directly synthesized according to a known method or a commercially available product may be used.
멜라민 수지는 예컨대 메톡시 메틸 멜라민, 메틸 멜라민, 부틸 멜라민, 이소부톡시 멜라민, 부톡시 멜라민, 헥사메틸올 멜라민, 헥사메톡시 메틸 멜라민, 헥사부톡시 메틸 멜라민, 헥사메톡시부톡시 메틸 멜라민 및 아미노메톡시 메틸 멜라민으로 이루어진 군으로부터 선택되는 1종 이상을 포함할 수 있다.Melamine resins include, for example, methoxy methyl melamine, methyl melamine, butyl melamine, isobutoxy melamine, butoxy melamine, hexamethylol melamine, hexamethoxy methyl melamine, hexabutoxy methyl melamine, hexamethoxybutoxy methyl melamine and aminomethyl melamine. It may include at least one selected from the group consisting of toxy methyl melamine.
멜라민 수지는 중량평균분자량(Mw) 이 500 내지 1,000 g/mol, 600 내지 900 g/mol, 또는 500 내지 800 g/mol 일 수 있다. 멜라민 수지의 중량평균분자량이 상기 범위 내일 경우, 가교 밀도를 향상시켜 제조된 도막의 부착성 및 경도를 향상시키는 효과가 있다. 멜라민 수지의 중량평균분자량이 상기 범위 미만인 경우 도막의 가교 밀도가 저하되어 내화학성 및 내스크래치성이 저하되는 문제가 있고, 상기 범위 초과인 경우 분자량 상향에 따라 도막의 외관 특성이 저하되는 문제가 발생할 수 있다.The melamine resin may have a weight average molecular weight (Mw) of 500 to 1,000 g/mol, 600 to 900 g/mol, or 500 to 800 g/mol. When the weight average molecular weight of the melamine resin is within the above range, there is an effect of improving the adhesion and hardness of the coating film prepared by improving the crosslinking density. When the weight average molecular weight of the melamine resin is less than the above range, the crosslinking density of the coating film is lowered, resulting in a decrease in chemical resistance and scratch resistance. can
멜라민 수지는 25℃에서의 점도가 2,000 내지 4,000 cps, 2,200 내지 3,900 cps, 또는 2,400 내지 3,800 cps 일 수 있다. 멜라민 수지의 25℃에서의 점도가 상기 범위 내일 경우, 광택 및 외관이 우수한 효과가 있다. 멜라민 수지의 25℃에서의 점도가 상기 범위 미만인 경우 점도가 낮아 도막 미형성으로 도막의 부착성 및 내스크래치성이 저하되는 문제가 있고, 상기 범위 초과인 경우 조성물의 작업성이 열세하여 제조된 도막의 외관 특성이 부족한 문제가 발생할 수 있다.The melamine resin may have a viscosity at 25° C. of 2,000 to 4,000 cps, 2,200 to 3,900 cps, or 2,400 to 3,800 cps. When the viscosity of the melamine resin at 25° C. is within the above range, gloss and appearance are excellent. If the viscosity at 25 ° C. of the melamine resin is less than the above range, the viscosity is low and the adhesion and scratch resistance of the coating film is deteriorated due to the formation of a coating film, and if the viscosity exceeds the above range, the workability of the composition is poor A problem may occur due to lack of appearance characteristics.
멜라민 수지의 시판품으로는 예를 들어, CYTEC사의 CYMEL-325, CYMEL-303, CYMEL-1161 및 CYMEL-1168, 및 BASF사의 LUWIPAL 012 및 LUWIPAL 072 등이 있다.Examples of commercially available melamine resins include CYTEC's CYMEL-325, CYMEL-303, CYMEL-1161 and CYMEL-1168, and BASF's LUWIPAL 012 and LUWIPAL 072.
멜라민 수지는 클리어 코트 조성물의 총 중량을 기준으로 5 내지 25 중량%, 7 내지 23 중량%, 또는 10 내지 20 중량%의 함량으로 포함될 수 있다. 멜라민 수지의 함량이 상기 범위 내일 경우, 가교 밀도를 향상시켜 제조된 도막의 부착성 및 경도를 향상시키는 효과가 있다. 멜라민 수지의 함량이 상기 범위 미만인 경우 경화성 저하에 따른 경도 및 외관 특성이 저하되는 문제가 있고, 상기 범위 초과인 경우 경화성 과다에 따른 도막이 브리틀(brittle)해져 부착성, 내충격성 및 내스크래치성이 저하되는 문제가 발생할 수 있다.The melamine resin may be included in an amount of 5 to 25% by weight, 7 to 23% by weight, or 10 to 20% by weight based on the total weight of the clear coat composition. When the content of the melamine resin is within the above range, there is an effect of improving the adhesion and hardness of the prepared coating film by improving the crosslinking density. If the content of the melamine resin is less than the above range, there is a problem in that the hardness and appearance characteristics are deteriorated due to a decrease in curability, and when the content exceeds the above range, the coating film is brittle due to excessive curability, resulting in adhesion, impact resistance and scratch resistance degradation may occur.
<아크릴 수지><Acrylic resin>
아크릴 수지는 조성물의 흐름성을 조절하기 위하여 포함될 수 있다.An acrylic resin may be included to control the flowability of the composition.
아크릴 수지는 공지된 방법에 따라 직접 합성된 것을 사용하거나, 시판되는 제품을 사용할 수 있다. 아크릴 수지는 예컨대 제2 비닐계 단량체와 제2(메트)아크릴레이트계 단량체 중 1종 이상을 중합하여 제조된 것일 수 있다.As the acrylic resin, one synthesized directly according to a known method may be used, or a commercially available product may be used. The acrylic resin may be prepared, for example, by polymerizing at least one of a second vinyl-based monomer and a second (meth)acrylate-based monomer.
아크릴 수지는 또 다른 예로 제2 비닐계 단량체, 제2(메트)아크릴 단량체 및 벤질 아민을 반응시켜 제조될 수도 있으며, 바늘 모양의 디우레아기가 존재하는 화학 구조를 가질 수 있다.As another example, the acrylic resin may be prepared by reacting a second vinyl-based monomer, a second (meth)acrylic monomer, and benzyl amine, and may have a chemical structure in which a needle-shaped diurea group exists.
제2 비닐계 단량체로는 예컨대 스티렌, 메틸스티렌, 디메틸스티렌, 플루오로스티렌, 에톡시스티렌, 메톡시스티렌, 페닐렌 비닐 케톤, 비닐 t-부틸 벤조에이트, 비닐 사이클로헥사노에이트, 비닐 아세테이트, 비닐 피롤리돈, 비닐 클로라이드, 비닐 알코올, 아세톡시스티렌, t-부틸스티렌 및 비닐톨루엔으로 이루어진 군으로부터 선택된 l종 이상을 사용할 수 있다.Examples of the second vinyl monomer include styrene, methylstyrene, dimethylstyrene, fluorostyrene, ethoxystyrene, methoxystyrene, phenylene vinyl ketone, vinyl t-butyl benzoate, vinyl cyclohexanoate, vinyl acetate, vinyl At least one selected from the group consisting of pyrrolidone, vinyl chloride, vinyl alcohol, acetoxy styrene, t-butyl styrene and vinyl toluene may be used.
제 2(메트)아크릴레이트계 단량체는 하이드록시기 미함유(메트)아크릴레이트 단량체 및 하이드록시기 함유(메트)아크릴레이트 단량체로 이루어진 군으로부터 선택된 1종 이상을 포함할 수 있다.The second (meth)acrylate-based monomer may include at least one selected from the group consisting of a hydroxy group-free (meth)acrylate monomer and a hydroxyl group-containing (meth)acrylate monomer.
하이드록시기 미함유(메트)아크릴레이트 단량체는 예를 들어, (메트)아크릴산, 메틸(메트)아크릴산, (메트)아크릴레이트, 메틸(메트)아크릴레이트, 에틸(메트)아크릴레이트, 프로필(메트)아크릴레이트, 이소프로필(메트)아크릴레이트, 부틸(메트)아크릴레이트, 이소부틸(메트)아크릴레이트, t-부틸(메트)아크릴레이트, 펜틸(메트)아크릴레이트, 헥실(메트)아크릴레이트, 헵틸(메트)아크릴레이트, 이소옥틸(메트)아크릴레이트, 옥틸(메트)아크릴레이트, 2-에틸헥실(메트)아크릴레이트, 이소데실(메트)아크릴레이트, 데실(메트)아크릴레이트, 도데실(메트)아크릴레이트, 이소보닐(메트)아크릴레이트 및 라우릴(메트)아크릴레이트로 이루어진 군으로부터 선택된 1종 이상을 포함할 수 있다.(meth)acrylate monomers containing no hydroxy group include, for example, (meth)acrylic acid, methyl (meth)acrylic acid, (meth)acrylate, methyl (meth)acrylate, ethyl (meth)acrylate, propyl (meth)acrylate, ) Acrylate, isopropyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, Heptyl (meth) acrylate, isooctyl (meth) acrylate, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isodecyl (meth) acrylate, decyl (meth) acrylate, dodecyl ( It may include at least one selected from the group consisting of meth)acrylate, isobornyl (meth)acrylate, and lauryl (meth)acrylate.
하이드록시기 함유(메트)아크릴레이트 단량체는 예를 들어, 하이드록시알킬 함유(메트)아크릴레이트일 수 있으며, 구체적으로 2-하이드록시 메틸(메트)아크릴레이트, 2-하이드록시 에틸(메트)아크릴레이트, 2-하이드록시 프로필(메트)아크릴레이트 및 2-하이드록시 부틸(메트)아크릴레이트로 이루어진 군으로부터 선택된 1종 이상을 포함할 수 있다.The hydroxy group-containing (meth)acrylate monomer may be, for example, a hydroxyalkyl-containing (meth)acrylate, specifically 2-hydroxy methyl (meth) acrylate, 2-hydroxy ethyl (meth) acrylate rate, 2-hydroxy propyl (meth) acrylate and 2-hydroxy butyl (meth) acrylate may include one or more selected from the group consisting of.
아크릴 수지는 예컨대 라디칼 중합법을 이용하여 제조된 것일 수 있으며, 개시제 및 중합 시간에 따라 물성, 즉 중량평균분자량(Mw), 수산기가(OHv), 산가(Av) 등의 물성을 조절할 수 있다.The acrylic resin may be prepared, for example, using a radical polymerization method, and physical properties such as weight average molecular weight (Mw), hydroxyl value (OHv), and acid value (Av) may be adjusted according to an initiator and polymerization time.
아크릴 수지는 중량평균분자량(Mw)이 6,000 내지 9,000 g/mol, 6,500 내지 8,500 g/mol, 또는 7,000 내지 8,000 g/mol 일 수 있다. 아크릴 수지의 중량평균분자량이 상기 범위 내일 경우, 조성물의 흐름성이 적절하여 작업성이 우수할 수 있다. 아크릴 수지의 중량평균분자량이 상기 범위 미만인 경우, 분자량이 작아 클리어 코트 조성물 조성물의 흐름성이 부족하여 작업성이 열세해지고 제조된 도막의 내산성 및 내화학성이 저하되는 문제가 있고, 상기 범위 초과인 경우 분자량 증가에 따른 클리어 코트 조성물 조성물의 작업성이 불량해지고 표면평활성이 좋지 않아 우수한 외관 및 광택을 갖는 도막을 제조하기 어려운 문제가 발생할 수 있다.The acrylic resin may have a weight average molecular weight (Mw) of 6,000 to 9,000 g/mol, 6,500 to 8,500 g/mol, or 7,000 to 8,000 g/mol. When the weight average molecular weight of the acrylic resin is within the above range, the flowability of the composition is appropriate and workability may be excellent. When the weight average molecular weight of the acrylic resin is less than the above range, there is a problem that the flowability of the clear coat composition is insufficient due to the small molecular weight, and the workability is poor, and the acid resistance and chemical resistance of the prepared coating film are lowered, and when it exceeds the above range As the molecular weight increases, the workability of the clear coat composition composition becomes poor and the surface smoothness is poor, making it difficult to prepare a coating film having excellent appearance and gloss.
아크릴 수지는 수산기가(OHv)가 110 내지 200 mgKOH/g, 또는 140 내지 150 mgKOH/g 일 수 있다. 아크릴 수지의 수산기가가 상기 범위 내일 경우, 도막의 내후성 개선 효과가 있다. 아크릴 수지의 수산기가가 상기 범위 미만인 경우 경화제와의 가교 반응에 의한 도막 형성이 불충분하여 도막의 경도 등의 기계적 물성이 저하되고, 상기 범위 초과인 경우 과경화되어 도막이 브리틀(brittle)해져 탄성이 떨어지고, 제조된 도막의 외관 특성, 내수성 및 내스크래치성이 부족한 문제가 발생할 수 있다.The acrylic resin may have a hydroxyl value (OHv) of 110 to 200 mgKOH/g or 140 to 150 mgKOH/g. When the hydroxyl value of the acrylic resin is within the above range, there is an effect of improving the weather resistance of the coating film. When the hydroxyl value of the acrylic resin is less than the above range, the formation of a coating film by a crosslinking reaction with the curing agent is insufficient, and mechanical properties such as hardness of the coating film are lowered. It may fall off, and problems such as lack of appearance characteristics, water resistance and scratch resistance of the produced coating film may occur.
아크릴 수지는 유리전이온도(Tg)가 0.5 내지 10℃, 또는 1 내지 5℃ 일 수 있다. 아크릴 수지의 유리전이온도가 상기 범위 내일 경우, 도막의 광택 특성 및 경도가 향상되는 효과가 있다. 아크릴 수지의 유리전이온도가 상기 범위 미만인 경우 클리어 코트 조성물의 건조속도가 지연되어 제조된 도막의 내용제성 및 내치핑성이 부족해지는 문제가 있고, 상기 범위 초과인 경우 도막이 브리틀(brittle)해져 도막의 외관 특성 및 경도가 부족해질 수 있다.The acrylic resin may have a glass transition temperature (Tg) of 0.5 to 10 °C or 1 to 5 °C. When the glass transition temperature of the acrylic resin is within the above range, there is an effect of improving gloss characteristics and hardness of the coating film. When the glass transition temperature of the acrylic resin is less than the above range, the drying rate of the clear coat composition is delayed, resulting in poor solvent resistance and chipping resistance of the prepared coating film. may be lacking in appearance characteristics and hardness.
아크릴 수지는 고형분 함량(NV)이 수지 총 중량에 대하여 40 내지 60 중량%, 또는 45 내지 55 중량%일 수 있다. 아크릴 수지의 고형분 함량이 상기 범위 내일 경우, 수지의 저장 안정성 및 클리어 코트 조성물의 저장 안정성이 개선되고 작업성이 우수할 수 있다. 아크릴 수지의 고형분 함량이 상기 범위 미만인 경우 점도가 지나치게 낮아져 이를 포함하는 클리어 코트 조성물의 작업성이 부족해지는 문제가 있고, 상기 범위 초과인 경우 아크릴 수지의 점도가 지나치게 높아 반응 중 안정성이 떨어지며, 분산 안정성이 나빠져 시간이 지나면 응집이 발생할 수 있다.The acrylic resin may have a solid content (NV) of 40 to 60% by weight, or 45 to 55% by weight based on the total weight of the resin. When the solid content of the acrylic resin is within the above range, storage stability of the resin and storage stability of the clear coat composition may be improved and workability may be excellent. When the solid content of the acrylic resin is less than the above range, the viscosity is too low, resulting in poor workability of the clear coat composition containing the same. Aggregation may occur over time.
아크릴 수지는 클리어 코트 조성물의 총 중량을 기준으로 3 내지 20 중량%, 또는 5 내지 15 중량%의 함량으로 포함될 수 있다. 아크릴 수지가 상기 함량 범위 내로 포함되는 경우, 클리어 코트 조성물의 흐름성을 개선하는 효과가 있다. 상기 아크릴 수지의 함량이 상기 범위 미만인 경우, 건조성이 저하되어 이를 포함하는 클리어 코트 조성물의 흐름성이 부족하여 작업성이 떨어질 수 있고, 상기 범위 초과인 경우 건조가 빨리 진행되어 조성물의 도장 작엽성, 칠흐름성이 저하되고 클리어 코트 조성물의 점도가 높아져 저장 안정성 및 외관이 저하될 수 있다.The acrylic resin may be included in an amount of 3 to 20% by weight, or 5 to 15% by weight based on the total weight of the clear coat composition. When the acrylic resin is included within the above content range, there is an effect of improving the flowability of the clear coat composition. When the content of the acrylic resin is less than the above range, the drying property is lowered and the flowability of the clear coat composition including the acrylic resin is insufficient, resulting in poor workability. , the coating flowability is lowered and the viscosity of the clear coat composition is increased, so storage stability and appearance may be lowered.
한편 본 발명의 하나의 양상에 따르는 클리어 코트 조성물은 아크릴실란 수지와 아크릴 수지를 3:1 내지 7:1, 또는 4:1 내지 6:1 의 중량비로 포함할 수 있다. 아크릴실란 수지와 아크릴 수지의 혼합 중량비가 상기 범위 내인 경우, 제조된 도막의 내구성 및 외관 특성이 향상되는 효과가 있다. 아크릴실란 수지와 아크릴 수지의 혼합 중량비가 상기 범위 미만인 경우, 즉 아크릴 수지를 기준으로 소량의 아크릴실란 수지를 포함하는 경우, 건조성이 저하되어 이를 포함하는 클리어 코트 조성물 조성물로부터 제조된 도막의 광택, 내수성 및 내충격성이 저하되는 문제가 있고, 상기 범위 초과인 경우, 즉 아크릴 수지를 기준으로 과량의 아크릴실란 수지를 포함하는 경우, 건조가 빨리 진행되어 조성물의 도장 작업성 및 칠흐름성이 부족하여 도막 외관 및 내한치핑성이 저하되는 문제가 발생할 수 있다.Meanwhile, the clear coat composition according to one aspect of the present invention may include an acrylic silane resin and an acrylic resin in a weight ratio of 3:1 to 7:1, or 4:1 to 6:1. When the mixed weight ratio of the acrylic silane resin and the acrylic resin is within the above range, there is an effect of improving durability and appearance characteristics of the produced coating film. When the mixed weight ratio of the acrylic silane resin and the acrylic resin is less than the above range, that is, when a small amount of the acrylic silane resin is included based on the acrylic resin, the drying property is lowered, resulting in a clear coat composition comprising the same. There is a problem of deterioration in water resistance and impact resistance, and when it exceeds the above range, that is, when an excessive amount of acrylic silane resin is included based on the acrylic resin, drying proceeds quickly and the painting workability and flowability of the composition are insufficient. A problem of deterioration of the coating film appearance and cold chipping resistance may occur.
<용제><Solvent>
본 발명의 하나의 양상에 따르는 클리어 코트 조성물은 용제를 포함할 수 있다. 용제는 조성물의 점도를 조절하고, 건조성을 개선하며, 제조된 도막의 외관 특성 및 퍼짐성을 개선시키는 역할을 한다.A clear coat composition according to one aspect of the present invention may include a solvent. The solvent serves to control the viscosity of the composition, improve drying properties, and improve the appearance characteristics and spreadability of the prepared coating film.
용제는 통상적으로 클리어 코트 조성물에 사용되는 것이라면 특별히 제한되지 않으며, 예를 들어, 방향족 탄화수소계 용제, 아세테이트계 용제, 알콜계 용제 및 프로피오네이트계 용제로 이루어진 군으로부터 선택된 l종 이상을 포함할 수 있다. 구체적으로, 용제는 톨루엔, 자일렌, 크실렌과 같은 방향족 탄화수소계 용제; 1-메톡시-2-프로필아세테이트, 메틸아세테이트, 에틸아세테이트, n-프로필아세테이트, n-부틸아세테이트, 메틸 글루타레이트, 메틸 석신에이트, 메틸 아디페이트, 디메틸 글루타레이트, 디메틸 석신에이트, 디메틸 아디페이트, 프로필렌글리콜 메틸 에테르 아세테이트(PMA), 부틸 카르비톨 아세테이트, 부틸 셀로솔브 아세테이트 등의 아세테이트계 용제; n-부탄올, 프로판올, 1-메톡시-2-프로판올, 2-부톡시에탄올 등의 알콜계 용제; 아세톤, 메틸에틸케톤, 메틸부틸케톤 및 메틸이소부틸케톤 등의 케톤계 용제; 및 에틸에톡시프로피오네이트 등의 프로피오네이트계 용제; 등을 포함할 수 있다. 또한, 방향족 탄화수소계 용제의 시판품으로는 코코졸 #100, 코코졸 #150 등이 있다.The solvent is not particularly limited as long as it is commonly used in the clear coat composition, and may include, for example, at least one selected from the group consisting of aromatic hydrocarbon-based solvents, acetate-based solvents, alcohol-based solvents, and propionate-based solvents. there is. Specifically, the solvent is an aromatic hydrocarbon-based solvent such as toluene, xylene, and xylene; 1-methoxy-2-propylacetate, methylacetate, ethylacetate, n-propylacetate, n-butylacetate, methyl glutarate, methyl succinate, methyl adipate, dimethyl glutarate, dimethyl succinate, dimethyl adipate Acetate solvents, such as a paste, propylene glycol methyl ether acetate (PMA), butyl carbitol acetate, and butyl cellosolve acetate; alcohol solvents such as n-butanol, propanol, 1-methoxy-2-propanol, and 2-butoxyethanol; ketone solvents such as acetone, methyl ethyl ketone, methyl butyl ketone, and methyl isobutyl ketone; and propionate-based solvents such as ethyl ethoxy propionate; etc. may be included. In addition, commercially available aromatic hydrocarbon-based solvents include Kokosol #100 and Kokosol #150.
용제는 클리어 코트 조성물의 총 중량을 기준으로 5 내지 40 중량%, 또는 10 내지 35 중량%의 함량으로 조성물에 포함될 수 있다. 용제가 상기 범위 내로 포함되는 경우, 조성물의 점도를 적절히 조절하여 작업성 및 건조성이 향상되는 효과가 있다. 클리어 코트 조성물 내 용제의 함량이 상기 범위 미만인 경우 조성물 내 고형분의 함량이 높아 조성물의 작업성이 부족한 문제가 있고, 상기 범위 초과인 경우 제조된 클리어 코트 조성물의 고형분 함량이 낮아 흐름성이 증대되어 제조된 도막의 외관 및 부착성이 부족한 문제가 발생할 수 있다.The solvent may be included in the composition in an amount of 5 to 40% by weight, or 10 to 35% by weight based on the total weight of the clear coat composition. When the solvent is included within the above range, there is an effect of improving workability and drying property by appropriately adjusting the viscosity of the composition. When the content of the solvent in the clear coat composition is less than the above range, the solid content in the composition is high, resulting in poor workability of the composition. Problems with poor appearance and adhesion of the coated film may occur.
<첨가제><Additives>
본 발명의 하나의 양상에 따른 클리어 코트 조성물은 광안정제, 산촉매, 수분흡수제, 경화 촉매, 자외선 흡수제, 표면평활제 등의 첨가제를 추가로 포함할 수 있다. 첨가제는 통상적으로 클리어 코트 조성물에 첨가할 수 있는 것이라면 특별히 제한하지 않는다.The clear coat composition according to one aspect of the present invention may further include additives such as a light stabilizer, an acid catalyst, a moisture absorbent, a curing catalyst, a UV absorber, and a surface leveling agent. Additives are not particularly limited as long as they can be added to the clear coat composition in general.
광안정제는 자외선 흡수 및 자외선에 의한 라디칼 연쇄반응을 억제하는 역할을 하며, 산촉매는 반응 촉진 및 경화 속도를 조절하는 역할을 하며, 표면평활제는 평활성 등의 외관 특성을 향상시키는 역할을 하며, 수분흡수제는 수분을 흡수하여 저장성을 개선하는 역할을 한다.Light stabilizers play a role in absorbing ultraviolet rays and suppress radical chain reactions caused by ultraviolet rays, acid catalysts play a role in accelerating the reaction and controlling the curing speed, and surface leveling agents play a role in improving appearance characteristics such as smoothness. The absorbent absorbs moisture and serves to improve storage properties.
첨가제의 함량은 통상적으로 클리어 코트 조성물에 포함될수 있는 범위라면 특별히 한정하지 않는다. 예를 들어, 첨가제는 클리어 코트 조성물의 총 중량을 기준으로 1 내지 15 중량%, 또는 1.5 내지 12 중량%, 또는 1.7 내지 11 중량%의 함량으로 조성물에 포함될 수 있다.The content of the additive is not particularly limited as long as it can be generally included in the clear coat composition. For example, the additive may be included in the composition in an amount of 1 to 15% by weight, or 1.5 to 12% by weight, or 1.7 to 11% by weight based on the total weight of the clear coat composition.
본 발명의 하나의 양상에 따른 클리어 코트 조성물은 주제부 및 경화제부를 포함하는 1 액형일 수 있다.A clear coat composition according to one aspect of the present invention may be a one-component type containing a main part and a curing agent part.
본 발명의 클리어 코트 조성물은 고형분 함량이 50 내지 60 중량%, 또는 52 내지 58 중량%일 수 있다. 본 발명의 클리어 코트 조성물의 고형분 함량이 상기 범위 내일 경우, 조성물의 도장 작업성이 적절해지는 장점이 있다. 본 발명의 클리어 코트 조성물의 고형분 함량이 상기 범위 미만인 경우 고형분 저하로 경화 반응성이 저하되는 문제가 있고, 상기 범위 초과인 경우 고형분 함량이 높아 클리어 코트 조성물의 작업성이 저하되는 문제가 발생할 수 있다.The clear coat composition of the present invention may have a solids content of 50 to 60% by weight, or 52 to 58% by weight. When the solid content of the clear coat composition of the present invention is within the above range, there is an advantage in that the painting workability of the composition becomes appropriate. When the solid content of the clear coat composition of the present invention is less than the above range, curing reactivity is reduced due to the decrease in solid content, and when the solid content is above the above range, the workability of the clear coat composition is reduced due to the high solid content.
본 발명의 클리어 코트 조성물은 포드컵 4번을 기준으로 38 내지 52 초, 40 내지 50 초, 또는 42 내지 48 초의 점도를 가질 수 있다. 본 발명의 클리어 코트 조성물의 점도가 상기 범위 미만인 경우 수직면 흘러내림 등의 문제가 발생할 수 있고, 상기 범위 초과인 경우 조성물의 점도가 높아 이로부터 제조된 도막의 외관특성을 저하시키거나 도장기에 부하가 걸려 도장기 고장의 원인이 될 수 있다.The clear coat composition of the present invention may have a viscosity of 38 to 52 seconds, 40 to 50 seconds, or 42 to 48 seconds based on Ford Cup No. 4. If the viscosity of the clear coat composition of the present invention is less than the above range, problems such as dripping down the vertical surface may occur, and if the viscosity is above the above range, the viscosity of the composition is high, deteriorating the appearance characteristics of the coating film prepared therefrom or increasing the load on the paint machine. It may get caught and cause damage to the sprayer.
본 발명에 따른 클리어 코트 조성물은 저분자량 및 고관능성의 폴리에스터 수지와, 저분자량의 실란 변성 폴리이소시아네이트 수지를 포함하여, 최종 도막의 가교 밀도를 향상시키면서 유연성과 탄성을 부여하여 내스크래치성 및 내구성이 우수한 도막을 제조할 수 있다. 또한, 본 발명의 클리어 코트 조성물로부터 제조된 도막은 내후성이 우수하여, 장기 주행 후 또는 옥외 폭로 후에도 외관 특성, 특히 광택의 저하가 없고 내스크래치성 및 내치핑성이 우수하다.The clear coat composition according to the present invention includes a low molecular weight and high functional polyester resin and a low molecular weight silane-modified polyisocyanate resin to improve the crosslinking density of the final coating film while imparting flexibility and elasticity, thereby providing scratch resistance and durability. This excellent coating film can be manufactured. In addition, the coating film prepared from the clear coat composition of the present invention has excellent weather resistance, no deterioration in appearance properties, particularly gloss, and excellent scratch resistance and chipping resistance even after long-term driving or outdoor exposure.
이하, 실시예를 통해 본 발명을 보다 구체적으로 설명한다. 그러나 이들 실시예는 본 발명의 이해를 돕기 위한 것일 뿐 어떠한 의미로든 본 발명의 범위가 이들 실시예로 한정되는 것은 아니다.Hereinafter, the present invention will be described in more detail through examples. However, these examples are only for helping the understanding of the present invention, and the scope of the present invention is not limited to these examples in any sense.
[클리어 코트 조성물 제조][Preparation of clear coat composition]
실시예 및 비교예의 클리어 코트 조성물 제조Preparation of clear coat compositions of Examples and Comparative Examples
아크릴실란 수지, 폴리에스터 수지, 우레탄 올리고머, 실란 변성 폴리이소시아네이트 수지, 멜라민 수지, 아크릴 수지, 첨가제 및 용제를 [표 1] 내지 [표 3]에 제시된 함량으로 혼합하여 포드컵 4번을 기준으로 46초의 점도를 가지는 클리어 코트 조성물을 제조하였다.Acrylic silane resin, polyester resin, urethane oligomer, silane-modified polyisocyanate resin, melamine resin, acrylic resin, additives and solvents were mixed in the contents shown in [Table 1] to [Table 3], and 46 based on Ford Cup No. 4 A clear coat composition having a viscosity of candle was prepared.
| 성분 (중량%)Ingredients (% by weight) | 실시예Example | ||||||
| 1One | 22 | 33 | 44 | 55 | 66 | 77 | |
| 아크릴 실란 수지acrylic silane resin | 3838 | 3838 | 3838 | 3838 | 3838 | 3838 | 3838 |
| 폴리에스터 수지-1polyester resin-1 | 55 | 22 | 99 | 0.50.5 | 12.812.8 | 55 | 55 |
| 폴리에스터 수지-2polyester resin-2 | |||||||
| 폴리에스터 수지-3polyester resin-3 | |||||||
| 폴리에스터 수지-4polyester resin-4 | |||||||
| 폴리에스터 수지-5Polyester Resin-5 | |||||||
| 폴리에스터 수지-6polyester resin-6 | |||||||
| 폴리에스터 수지-7Polyester resin-7 | |||||||
| 폴리에스터 수지-8polyester resin-8 | |||||||
| 폴리에스터 수지-9Polyester Resin-9 | |||||||
| 우레탄 올리고머Urethane Oligomer | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 |
| 실란 변성 폴리이소시아네이트 수지-1Silane-modified polyisocyanate resin-1 | 6.26.2 | 6.26.2 | 6.26.2 | 6.26.2 | 6.26.2 | 33 | 1212 |
| 실란 변성 폴리이소시아네이트 수지-2Silane-modified polyisocyanate resin-2 | |||||||
| 실란 변성 폴리이소시아네이트 수지-3Silane-modified polyisocyanate resin-3 | |||||||
| 실란 변성 폴리이소시아네이트 수지-4Silane Modified Polyisocyanate Resin-4 | |||||||
| 실란 변성 폴리이소시아네이트 수지-5Silane-modified polyisocyanate resin-5 | |||||||
| 멜라민 수지melamine resin | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 |
| 아크릴 수지acrylic resin | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 |
| 경화 촉매curing catalyst | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 |
| 광 안정제light stabilizer | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 |
| 표면 평활제surface leveler | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 |
| 수분 흡수제moisture absorbent | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 |
| 부틸알코올butyl alcohol | 2.22.2 | 2.22.2 | 2.22.2 | 2.22.2 | 2.22.2 | 2.22.2 | 2.22.2 |
| 코코졸 #100Cocozol #100 | 7.57.5 | 8.78.7 | 5.15.1 | 9.39.3 | 3.83.8 | 8.38.3 | 4.54.5 |
| EEPEEP | 10.810.8 | 12.612.6 | 9.29.2 | 13.513.5 | 6.76.7 | 13.213.2 | 88 |
| 합계Sum | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 |
| 성분 (중량%)Ingredients (% by weight) | 실시예Example | |||||||
| 88 | 99 | 1010 | 1111 | 1212 | 1313 | 1414 | 1515 | |
| 아크릴 실란 수지acrylic silane resin | 3838 | 3838 | 3838 | 3838 | 3838 | 3838 | 3838 | 3838 |
| 폴리에스터 수지-1polyester resin-1 | 55 | 55 | 55 | 55 | ||||
| 폴리에스터 수지-2polyester resin-2 | 55 | |||||||
| 폴리에스터 수지-3polyester resin-3 | 55 | |||||||
| 폴리에스터 수지-4polyester resin-4 | ||||||||
| 폴리에스터 수지-5Polyester resin-5 | ||||||||
| 폴리에스터 수지-6polyester resin-6 | 55 | |||||||
| 폴리에스터 수지-7Polyester resin-7 | 55 | |||||||
| 폴리에스터 수지-8polyester resin-8 | ||||||||
| 폴리에스터 수지-9Polyester Resin-9 | ||||||||
| 우레탄 올리고머Urethane Oligomer | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | ||
| 실란 변성 폴리이소시아네이트 수지-1Silane-modified polyisocyanate resin-1 | 0.50.5 | 15.415.4 | 6.26.2 | 6.26.2 | 6.26.2 | 6.26.2 | ||
| 실란 변성 폴리이소시아네이트 수지-2Silane-modified polyisocyanate resin-2 | 6.26.2 | |||||||
| 실란 변성 폴리이소시아네이트 수지-3Silane-modified polyisocyanate resin-3 | 6.26.2 | |||||||
| 실란 변성 폴리이소시아네이트 수지-4Silane Modified Polyisocyanate Resin-4 | ||||||||
| 실란 변성 폴리이소시아네이트 수지-5Silane-modified polyisocyanate resin-5 | ||||||||
| 멜라민 수지melamine resin | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 |
| 아크릴 수지acrylic resin | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 |
| 경화 촉매curing catalyst | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 |
| 광 안정제light stabilizer | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 |
| 표면 평활제surface leveler | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 |
| 수분 흡수제moisture absorbent | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 |
| 부틸알코올butyl alcohol | 2.22.2 | 2.22.2 | 2.62.6 | 2.62.6 | 2.62.6 | 2.62.6 | 2.62.6 | 2.62.6 |
| 코코졸 #100Cocozol #100 | 9.79.7 | 3.83.8 | 6.86.8 | 6.86.8 | 6.86.8 | 6.86.8 | 9.69.6 | 9.69.6 |
| EEPEEP | 14.814.8 | 5.35.3 | 11.111.1 | 11.111.1 | 11.111.1 | 11.111.1 | 15.815.8 | 15.815.8 |
| 합계Sum | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 |
| 성분 (중량%)Ingredients (% by weight) | 비교예comparative example | ||||||||
| 1One | 22 | 33 | 44 | 55 | 66 | 77 | 88 | 99 | |
| 아크릴 실란 수지acrylic silane resin | 3838 | 3838 | 3838 | 3838 | 3838 | 3838 | 3838 | 3838 | |
| 폴리에스터 수지-1polyester resin-1 | 55 | 55 | 55 | 55 | |||||
| 폴리에스터 수지-2polyester resin-2 | |||||||||
| 폴리에스터 수지-3polyester resin-3 | |||||||||
| 폴리에스터 수지-4polyester resin-4 | 55 | ||||||||
| 폴리에스터 수지-5Polyester Resin-5 | 55 | ||||||||
| 폴리에스터 수지-6polyester resin-6 | |||||||||
| 폴리에스터 수지-7Polyester resin-7 | |||||||||
| 폴리에스터 수지-8polyester resin-8 | 55 | ||||||||
| 폴리에스터 수지-9Polyester Resin-9 | 55 | ||||||||
| 우레탄 올리고머Urethane Oligomer | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | 7.57.5 | ||
| 실란 변성 폴리이소시아네이트 수지-1Silane-modified polyisocyanate resin-1 | 6.26.2 | 6.26.2 | 6.26.2 | 6.26.2 | 6.26.2 | 6.26.2 | |||
| 실란 변성 폴리이소시아네이트 수지-2Silane-modified polyisocyanate resin-2 | |||||||||
| 실란 변성 폴리이소시아네이트 수지-3Silane-modified polyisocyanate resin-3 | |||||||||
| 실란 변성 폴리이소시아네이트 수지-4Silane Modified Polyisocyanate Resin-4 | 6.26.2 | ||||||||
| 실란 변성 폴리이소시아네이트 수지-5Silane-modified polyisocyanate resin-5 | 6.26.2 | ||||||||
| 멜라민 수지melamine resin | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 | 1111 |
| 아크릴 수지acrylic resin | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 | 7.27.2 |
| 경화 촉매curing catalyst | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 | 1.41.4 |
| 광 안정제light stabilizer | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 | 1.31.3 |
| 표면 평활제surface leveler | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 | 0.30.3 |
| 수분 흡수제moisture absorbent | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 | 1.61.6 |
| 부틸알코올butyl alcohol | 4.54.5 | 3.73.7 | 8.68.6 | 2.62.6 | 2.62.6 | 2.62.6 | 2.62.6 | 2.62.6 | 2.62.6 |
| 코코졸 #100Cocozol #100 | 8.88.8 | 8.88.8 | 13.813.8 | 7.87.8 | 7.87.8 | 7.87.8 | 7.87.8 | 9.69.6 | 9.69.6 |
| EEPEEP | 12.212.2 | 14.214.2 | 36.136.1 | 10.110.1 | 10.110.1 | 10.110.1 | 10.110.1 | 15.815.8 | 15.815.8 |
| 합계Sum | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 | 100100 |
실시예 및 비교예에 사용된 각 성분들의 물성, 제조사 및 제품명, 또는 성분명을 아래 [표 4]에 제시한다.The physical properties, manufacturer and product names, or ingredient names of each component used in Examples and Comparative Examples are presented in [Table 4] below.
| 성분 ingredient | 물성, 또는 제조사 및 제품명Physical properties, or manufacturer and product name |
| 아크릴 실란 수지acrylic silane resin | Mw: 8,000g/mol, OHv: 88mgKOH/g, Av: 1mgKOH/g, Tg: 42℃, NV: 70중량%Mw: 8,000 g/mol, OHv: 88 mgKOH/g, Av: 1 mgKOH/g, Tg: 42°C, NV: 70% by weight |
| 폴리에스터 수지-1polyester resin-1 | Mn: 470g/mol, OHv: 320mgKOH/g, 점도(25℃) : 1,050cpsMn: 470g/mol, OHv: 320mgKOH/g, Viscosity (25℃): 1,050cps |
| 폴리에스터 수지-2polyester resin-2 | Mn: 470g/mol, OHv: 270mgKOH/g, 점도(25℃) : 1,050cpsMn: 470g/mol, OHv: 270mgKOH/g, Viscosity (25℃): 1,050cps |
| 폴리에스터 수지-3polyester resin-3 | Mn: 470g/mol, OHv: 380mgKOH/g, 점도(25℃) : 1,050cpsMn: 470g/mol, OHv: 380mgKOH/g, Viscosity (25℃): 1,050cps |
| 폴리에스터 수지-4polyester resin-4 | Mn: 470g/mol, OHv: 220mgKOH/g, 점도(25℃) : 1,050cpsMn: 470g/mol, OHv: 220mgKOH/g, Viscosity (25℃): 1,050cps |
| 폴리에스터 수지-5Polyester Resin-5 | Mn: 470g/mol, OHv: 430mgKOH/g, 점도(25℃) : 1,050cpsMn: 470g/mol, OHv: 430mgKOH/g, Viscosity (25℃): 1,050cps |
| 폴리에스터 수지-6polyester resin-6 | Mn: 380g/mol, OHv: 320mgKOH/g, 점도(25℃) : 860cpsMn: 380g/mol, OHv: 320mgKOH/g, Viscosity (25℃): 860cps |
| 폴리에스터 수지-7Polyester resin-7 | Mn:570g/mol, OHv: 320mgKOH/g, 점도(25℃) : 1,150cpsMn: 570g/mol, OHv: 320mgKOH/g, Viscosity (25℃): 1,150cps |
| 폴리에스터 수지-8polyester resin-8 | Mn: 330g/mol, OHv: 320mgKOH/g, 점도(25℃) : 750cpsMn: 330g/mol, OHv: 320mgKOH/g, Viscosity (25℃): 750cps |
| 폴리에스터 수지-9Polyester Resin-9 | Mn: 620g/mol, OHv: 320mgKOH/g, 점도(25℃) : 1,280cpsMn: 620g/mol, OHv: 320mgKOH/g, Viscosity (25℃): 1,280cps |
| 우레탄 올리고머Urethane Oligomer | Mn: 1,050g/mol, Tg: -20℃, NV: 80중량%Mn: 1,050 g/mol, Tg: -20°C, NV: 80% by weight |
| 실란 변성 폴리이소시아네이트 수지-1Silane-modified polyisocyanate resin-1 | Mn: 2,130g/mol, 점도(25℃) : 760cps, NV: 79중량%,Si에 결합된 알콕시 그룹의 개수 : 16개Mn: 2,130g/mol, Viscosity (25℃): 760cps, NV: 79% by weight, Number of alkoxy groups bonded to Si: 16 |
| 실란 변성 폴리이소시아네이트 수지-2Silane-modified polyisocyanate resin-2 | Mn:1,130g/mol, 점도(25℃) : 410cps, NV: 79중량%,Si에 결합된 알콕시 그룹의 개수 : 10개Mn: 1,130g/mol, Viscosity (25℃): 410cps, NV: 79% by weight, Number of alkoxy groups bonded to Si: 10 |
| 실란 변성 폴리이소시아네이트 수지-3Silane-modified polyisocyanate resin-3 | Mn:3,830g/mol, 점도(25℃) : 1,120cps, NV: 80중량%,Si에 결합된 알콕시 그룹의 개수 : 22개Mn: 3,830g/mol, Viscosity (25℃): 1,120cps, NV: 80% by weight, Number of alkoxy groups bonded to Si: 22 |
| 실란 변성 폴리이소시아네이트 수지-4Silane Modified Polyisocyanate Resin-4 | Mn: 920g/mol, 점도(25℃) : 320cps, NV: 78중량%,Si에 결합된 알콕시 그룹의 개수 : 6개Mn: 920g/mol, Viscosity (25℃): 320cps, NV: 78% by weight, Number of alkoxy groups bonded to Si: 6 |
| 실란 변성 폴리이소시아네이트 수지-5Silane-modified polyisocyanate resin-5 | Mn: 4,190g/mol, 점도(25℃) : 1,430cps, NV: 80중량%,Si에 결합된 알콕시 그룹의 개수 : 28개Mn: 4,190g/mol, Viscosity (25℃): 1,430cps, NV: 80% by weight, Number of alkoxy groups bonded to Si: 28 |
| 멜라민 수지melamine resin | 알킬화 멜라민 수지(cymel 1168, Cytec사)Alkylated melamine resin (cymel 1168, Cytec) |
| 아크릴 수지acrylic resin | Mw: 7,700g/mol, OHv: 145mgKOH/g, Tg: 3℃, NV: 50중량%Mw: 7,700 g/mol, OHv: 145 mgKOH/g, Tg: 3° C., NV: 50% by weight |
| 경화 촉매curing catalyst | 제조사: King Industries사, 제품명: NACURE 5225Manufacturer: King Industries, product name: NACURE 5225 |
| 광 안정제light stabilizer | 제조사: BASF사, 제품명: Tinuvin 5341Manufacturer: BASF, product name: Tinuvin 5341 |
| 표면 평활제surface leveler | 제조사: BYK 사, 제품명: BYK358NManufacturer: BYK, product name: BYK358N |
| 수분 흡수제moisture absorbent | 트리메틸 오르소아세테이트trimethyl orthoacetate |
| 용제solvent | 부틸알코올(N-Butyl Alcohol), 코코졸#100 (Kocosol#100), EEP(Ethyl 3-EthoxypropionateButyl Alcohol (N-Butyl Alcohol), Kocosol #100 (Kocosol #100), EEP (Ethyl 3-Ethoxypropionate |
[도막 특성 평가][Evaluation of film properties]
시편에 프라이머 도료(제조사: KCC, 제품명: FU2300)를 도포하고 140℃에서 20분간 경화시켜 두께 40㎛의 프라이머 도막을 형성하였다. 이후 프라이머 도막 상에 베이스 코트(제조사: KCC, 제품명: WT3060)를 벨 도장(Bell spray)하고,80℃에서 3분간 핫 에어를 불어주어 도료 내에 잔존하는 물을 증발시켜 두께 15㎛의 베이스 도막을 형성하였다. 이후 베이스 도막 상에 실시예 및 비교예에서 제조한 클리어 코트 조성물을 도장하고 140℃에서 25분 동안 경화하여 두께 40㎛의 클리어 도막을 형성하여 최종 도막을 제조하였다. 상기 시편을 대상으로 하기와 같은 방법으로 물성을 측정하였으며, 그 결과를 [표 5] 내지 [표 7]에 제시한다.A primer coating material (manufacturer: KCC, product name: FU2300) was applied to the specimen and cured at 140° C. for 20 minutes to form a primer coating film having a thickness of 40 μm. Thereafter, a base coat (manufacturer: KCC, product name: WT3060) is applied by bell spray on the primer film, and hot air is blown at 80 ° C for 3 minutes to evaporate the remaining water in the paint to form a base film with a thickness of 15㎛. formed. Thereafter, the clear coat composition prepared in Examples and Comparative Examples was coated on the base coating film and cured at 140° C. for 25 minutes to form a clear coating film having a thickness of 40 μm to prepare a final coating film. The physical properties of the specimens were measured in the following manner, and the results are presented in [Table 5] to [Table 7].
구체적으로, 클리어 도막은 핸드건 스프레이(노즐 구경: 1.5㎜, 공기압: 45kgf/㎠ 내외로 일정 유지)를 이용하고, 노즐 입구와 시편 사이의 거리를 30㎝로 일정하게 유지하면서 수평으로 45㎝/sec 속도로 움직이며 도장하였다.Specifically, the clear coating film uses a hand gun spray (nozzle aperture: 1.5 mm, air pressure: maintained constant around 45 kgf/cm 2 ), and maintains a constant distance between the nozzle inlet and the specimen at 30 cm, while maintaining a constant 45 cm/cm It was painted while moving at the speed of sec.
(1) 외 관(1) Appearance
제조된 최종 도막을 대상으로 자동차 외관 측정기인 Wave Scan DOI(BYK Gardner)를 사용하여 광택(LU), 선명도(SH) 및 오렌지필(OP)을 측정하였으며, 측정된 물성을 이용하여 종합 외관 평가 수치(CF)를 하기 수학식 1로 계산하였다.Gloss (LU), sharpness (SH), and orange peel (OP) were measured using Wave Scan DOI (BYK Gardner), an automotive exterior measuring instrument, for the final coating film manufactured, and comprehensive exterior evaluation values were used using the measured physical properties. (CF) was calculated by Equation 1 below.
[수학식 1][Equation 1]
CF = LU × 0.15 + SH × 0.35 + OP × 0.5CF = LU × 0.15 + SH × 0.35 + OP × 0.5
CF는 수평 및 수직으로 측정 및 계산하였다. CF의 수평/수직 값으로, CF가 77 이상/73 이상이면 우수(◎), 75 이상 77 미만/70 이상 73 미만이면 양호(○), 72 이상 75 미만/67 이상 70미만이면 보통(△), 72 미만/67 미만이면 불량(×)으로 평가하였다.CF was measured and calculated horizontally and vertically. Horizontal/vertical value of CF. CF is 77 or more/73 or more excellent (◎), 75 or more and less than 77/70 or more and less than 73 is good (○), 72 or more and less than 75/67 or more and less than 70 is average (△) , less than 72/67 were evaluated as defective (x).
(2) 초기 내스크래치성(2) Initial scratch resistance
최종 도막 표면의 20ㅇ 광택을 측정한 후(초기 광택 측정), 자동차 내스크래치성 측정기(AMTEC-KISTER사 제품)를 이용하여 최종 도막 표면을 10회 왕복 처리한 후 20ㅇ 광택을 측정하고， 초기 광택을 기준으로 광택 유지율(%)을 계산하였다.After measuring the 20 ㅇ gloss of the final coating film surface (initial gloss measurement), using an automotive scratch resistance meter (AMTEC-KISTER Co., Ltd.) to reciprocate the final coating film surface 10 times, measure the 20 ㅇ gloss, and Gloss retention (%) was calculated based on gloss.
광택 유지율(%)이 80% 이상이면 우수(◎), 70% 이상 80% 미만이면 양호(○), 60% 이상 70% 미만이면 보통(△), 60% 미만이면 불량(×)으로 평가하였다.If the gloss retention rate (%) was 80% or more, it was evaluated as excellent (◎), 70% or more and less than 80% as good (○), 60% or more and less than 70% as normal (△), and less than 60% as poor (×). .
(3) 내후성 후 내스크래치성(3) Scratch resistance after weathering
최종 도막 표면의 20ㅇ 광택을 측정하고(초기 광택 측정), 촉진 내후성 측정기인 Weather-O-Meter(WOM)를 이용하여 1,000시간 동안 폭로시킨 후，자동차 내스크래치성 측정기(AMTEC-KISTER사 제품)를 이용하여 최종 도막 표면을 10회 왕복처리한 후 20ㅇ 광택을 측정하고, 초기 광택을 기준으로 광택 유지율(%)을 계산하였다.After measuring the 20 ° gloss of the surface of the final coating film (initial gloss measurement) and exposing for 1,000 hours using the accelerated weather resistance meter Weather-O-Meter (WOM), the automobile scratch resistance meter (AMTEC-KISTER Co., Ltd.) After reciprocating the surface of the final coating film 10 times using , the gloss was measured at 20 ° , and the gloss retention rate (%) was calculated based on the initial gloss.
광택 유지율(%)이 65% 이상이면 우수(◎), 55% 이상 65% 미만이면 양호(○), 40% 이상 55% 미만이면 보통(△), 40% 미만이면 불량(×)으로 평가하였다.If the gloss retention rate (%) was 65% or more, it was evaluated as excellent (◎), 55% or more and less than 65% as good (○), 40% or more and less than 55% as normal (△), and less than 40% as poor (×). .
(4) 광택(4) gloss
도막에서 반사되어 나온 광택(GLOSS, %)을 측정하기 위해, 광택기(BYK Gardner)를 적용하여 최종 도막의 20ㅇ 광택을 측정하였다.In order to measure the gloss (GLOSS, %) reflected from the coating film, a glosser (BYK Gardner) was applied to measure the 20 ㅇ gloss of the final coating film.
측정 결과에 따라 광택이 91% 이상이면 우수(◎), 89% 이상 91% 미만이면 양호(○), 87% 이상 89% 미만이면 보통(△), 87% 미만이면 불량(×)으로 평가하였다.According to the measurement results, if the gloss was 91% or more, it was evaluated as excellent (◎), 89% or more and less than 91% as good (○), 87% or more and less than 89% as normal (△), and less than 87% as poor (×). .
(5) 내치핑성(5) Chipping resistance
최종 도막을 -20℃에서 3시간 방치한 후 5bar의 압력으로 50g의 치핑 스톤(직경 4㎜)을 45ㅇ 각도로 가격하였다. 이후 최종 도막에 남아있는 박리된 도막 등의 이물질을 제거하였다.After the final coating was left at -20 ° C for 3 hours, a 50 g chipping stone (4 mm in diameter) was hit at an angle of 45 ° under a pressure of 5 bar. Thereafter, foreign substances such as peeled off coating film remaining in the final coating film were removed.
최종 도막의 손상부위에 대하여, 1㎜ 이하의 손상이 10개 이하이면 우수(◎), 1㎜ 초과 2㎜ 미만의 손상이 10개 이하이면 양호(○), 2㎜ 이상 3㎜ 미만의 손상이 10개 이하이면 보통(△), 2㎜ 이상 3㎜ 미만의 손상이 10개 초과이면 불량(×)으로 평가하였다.Regarding the damaged part of the final coating film, if there are 10 or less damages of 1 mm or less, excellent (◎), if there are 10 or less damages of more than 1 mm and less than 2 mm, good (○), and damages of 2 mm or more and less than 3 mm 10 or less were evaluated as normal (Δ), and damages of 2 mm or more and less than 3 mm were evaluated as defective (×) if more than 10 damages.
(6) 경도(6) hardness
연필 경도법으로 클리어 도막의 경도를 측정하였다. 구체적으로 3B, 2B, B, HB, F, H, 및 2H 각각의 연필을 이용하여 클리어 도막에 손상을 주지 않는 최대 경도를 측정하였다.The hardness of the clear coating film was measured by the pencil hardness method. Specifically, the maximum hardness without damaging the clear coating film was measured using pencils of 3B, 2B, B, HB, F, H, and 2H, respectively.
측정결과 HB 이상이면 우수(◎), B이면 양호(○), 2B이면 보통(△), 3B 이하이면 불량(×)으로 평가하였다.As a result of the measurement, it was evaluated as excellent (◎) if it was HB or higher, good (○) if it was B, normal (Δ) if it was 2B, and poor (×) if it was less than 3B.
(7) 내충격성(7) Impact resistance
최종 도막을 대상으로 내충격성을 ASTM D2794에 의거하여 평가하였다. 듀퐁식 충격시험기를 이용하였으며, 추의 낙하 높이를 30㎝부터 50㎝까지 변화시키면서 500g의 추를 시편에 떨어뜨렸을 때, 도막의 외관을 관찰하였다.The impact resistance of the final coating film was evaluated according to ASTM D2794. A DuPont impact tester was used, and the appearance of the coating film was observed when a 500g weight was dropped on the specimen while changing the drop height of the weight from 30cm to 50cm.
관찰 결과, 추의 낙하 높이 50㎝ 이상에서 도막의 균열 또는 박리 현상이 발생하지 않은 경우 우수(◎), 30㎝ 이상 50㎝ 미만에서 도막의 균열 또는 박리 현상이 발생한 경우 양호(○), 20㎝ 이상 30㎝ 미만에서 도막의 균열 또는 박리 현상이 발생한 경우 보통(△), 20㎝ 미만에서 도막의 균열 또는 박리 현상이 발생한 경우 불량(×)으로 평가하였다.As a result of observation, if cracks or peeling of the coating did not occur at a drop height of 50 cm or more, excellent (◎), if cracks or peeling of the coating occurred at a height of 30 cm or more and less than 50 cm, good (○), 20 cm If the crack or peeling phenomenon of the coating film occurred at less than 30 cm, it was evaluated as normal (Δ), and when the crack or peeling phenomenon of the coating film occurred at less than 20 cm, it was evaluated as defective (×).
(8) 내수성(8) water resistance
최종 도막을 40℃ 항온수조에 240시간 동안 침적하고 l시간 동안 상온에서 방치한 후 바둑목법으로 부착성을 평가하고 변색을 육안으로 확인하였다. The final coating film was immersed in a constant temperature water bath at 40° C. for 240 hours, left at room temperature for 1 hour, and then adhesion was evaluated by a checkerboard method, and discoloration was visually confirmed.
구체적으로, 상기 바둑목법은 클리어 도막 표면을 칼로 가로 2mm 및 세로 2mm의 정사각형 100개를 만든 후 테이프를 사용하여 정사각형을 떼어내어 부착성을 측정하였다. 이때, 측정된 부착성은 100개의 정사각형이 100% 온전히 붙어있는 경우 우수(◎), 남은 정사각형이 70% 이상 100% 미만인 경우 양호(○), 50% 이상 70% 미만인 경우 보통(△), 50% 미만인 경우 불량(×)으로 평가하였다.Specifically, in the check mark method, after making 100 squares of 2 mm in width and 2 mm in length with a knife on the surface of the clear coating film, the squares were removed using a tape to measure adhesion. At this time, the measured adhesion is excellent (◎) when 100 squares are fully attached (◎), good (○) when the remaining squares are 70% or more and less than 100%, normal (△), 50% when 50% or more and less than 70% If less than, it was evaluated as defective (×).
(9) 내용제성(9) Solvent resistance
최종 도막의 표면에 자일렌(xylene) 용제를 충분히 묻힌 면포를 올려놓은 후 1분 마다 손톱으로 2kgf의 힘으로 4회 긁어 베이스 도막면이 나타난 시간을 측정하였다.After placing a cotton cloth sufficiently soaked in xylene solvent on the surface of the final coating film, scraping it four times with a fingernail at a force of 2 kgf every 1 minute was measured for the time at which the base coating surface appeared.
측정 결과는 10분 이상이면 우수(◎), 7분 이상 10분 미만이면 양호(○), 5분 이상 7분 미만이면 보통(△), 5분 이하이면 불량(×)으로 평가하였다.The measurement result was evaluated as excellent (◎) if it was 10 minutes or more, good (○) if it was 7 minutes or more and less than 10 minutes, average (Δ) if it was 5 minutes or more and less than 7 minutes, and poor (×) if it was 5 minutes or less.
(10) 내후성(10) Weatherability
최종 도막을 촉진 내후성 측정기인 WOM에 1,000시간 노출 전과 후의 광택 유지율(20ㅇ 광택), 부착성, 및 색차(X-Rite MA98) 테스트를 실시하였다.The final coating film was tested for gloss retention (20 ㅇ gloss), adhesion, and color difference (X-Rite MA98) before and after 1,000 hours of exposure to WOM, an accelerated weather resistance tester.
구체적으로 부착성은 항목 (8)의 바둑목법을 이용하였으며, 남은 사각형이 100%이고 광택 유지율이 97%이상이며 색차값(△E)이 0.5 이하이면 우수(◎), 남은 사각형이 100%이고 광택 유지율이 93% 이상 97% 미만이며 색차값(△E)이 1.0 이하이면 양호(○), 남은 사각형이 100%이고 광택 유지율이 90% 이상 93% 미만이며 색차값(△E)이 1.0 이하이면 보통(△), 남은 사각형이 10% 이상 100% 미만이고 광택 유지율이 90% 미만이며 색차값(△E)이 1.0 초과이면 불량(×)으로 평가하였다.Specifically, the check mark method of item (8) was used for adhesion. If the remaining squares are 100%, the gloss retention is 97% or more, and the color difference value (ΔE) is 0.5 or less, it is excellent (◎), and the remaining squares are 100% and glossy. If the retention rate is 93% or more and less than 97% and the color difference value (ΔE) is 1.0 or less, it is good (○). Normal (Δ), if the remaining squares were 10% or more and less than 100%, the gloss retention was less than 90%, and the color difference value (ΔE) was more than 1.0, it was evaluated as defective (×).
| 도막물성film properties | 실시예Example | ||||||
| 1One | 22 | 33 | 44 | 55 | 66 | 77 | |
| 외관Exterior | ◎◎ | ○○ | ○○ | ○○ | ○○ | ○○ | ○○ |
| 초기 내스크래치성Initial scratch resistance | ◎◎ | ○○ | ◎◎ | ○○ | ○○ | ○○ | ◎◎ |
| 내후성 후 내스크래치성Scratch resistance after weathering | ◎◎ | ○○ | ◎◎ | △△ | ○○ | ○○ | ◎◎ |
| 광택Polish | ◎◎ | ○○ | ◎◎ | ○○ | ○○ | ◎◎ | ○○ |
| 내치핑성chipping resistance | ◎◎ | ◎◎ | ○○ | ◎◎ | △△ | ○○ | ○○ |
| 경도Hardness | ◎◎ | ◎◎ | ○○ | ◎◎ | ○○ | ◎◎ | ○○ |
| 내충격성impact resistance | ◎◎ | ○○ | ○○ | △△ | △△ | ◎◎ | ○○ |
| 내수성water resistance | ◎◎ | ◎◎ | ○○ | ◎◎ | ○○ | ◎◎ | ○○ |
| 내용제성solvent resistance | ◎◎ | ◎◎ | ◎◎ | ◎◎ | ◎◎ | ◎◎ | ◎◎ |
| 내후성weatherability | ◎◎ | ◎◎ | ◎◎ | ◎◎ | ◎◎ | ◎◎ | ◎◎ |
| 도막물성film properties | 실시예Example | |||||||
| 88 | 99 | 1010 | 1111 | 1212 | 1313 | 1414 | 1515 | |
| 외관Exterior | ○○ | △△ | ○○ | ○○ | ◎◎ | ○○ | ○○ | ○○ |
| 초기 내스크래치성Initial scratch resistance | △△ | ◎◎ | ◎◎ | ○○ | ◎◎ | ○○ | ◎◎ | ○○ |
| 내후성 후 내스크래치성Scratch resistance after weathering | △△ | ○○ | ○○ | ○○ | ◎◎ | ○○ | ○○ | ○○ |
| 광택Polish | ◎◎ | △△ | ◎◎ | ◎◎ | ◎◎ | ○○ | ○○ | ○○ |
| 내치핑성chipping resistance | ○○ | ○○ | ◎◎ | ◎◎ | ○○ | ○○ | ◎◎ | ◎◎ |
| 경도Hardness | ◎◎ | △△ | ○○ | ◎◎ | ○○ | ◎◎ | ◎◎ | ◎◎ |
| 내충격성impact resistance | ◎◎ | △△ | ○○ | ◎◎ | ○○ | ○○ | ○○ | ○○ |
| 내수성water resistance | ◎◎ | ○○ | ◎◎ | ◎◎ | ○○ | ◎◎ | ○○ | ◎◎ |
| 내용제성solvent resistance | ◎◎ | ◎◎ | ○○ | ◎◎ | ◎◎ | ◎◎ | ◎◎ | ◎◎ |
| 내후성weather resistance | ◎◎ | ◎◎ | ◎◎ | ○○ | ○○ | ◎◎ | ○○ | ◎◎ |
| 도막물성film properties | 비교예comparative example | ||||||||
| 1One | 22 | 33 | 44 | 55 | 66 | 77 | 88 | 99 | |
| 외관Exterior | △△ | XX | △△ | △△ | △△ | ○○ | XX | XX | XX |
| 초기 내스크래치성Initial scratch resistance | XX | △△ | ○○ | ○○ | XX | ○○ | △△ | ○○ | △△ |
| 내후성 후 내스크래치성Scratch resistance after weathering | XX | XX | ○○ | XX | XX | ○○ | XX | XX | XX |
| 광택Polish | △△ | XX | XX | ○○ | ○○ | ○○ | XX | XX | XX |
| 내치핑성chipping resistance | XX | △△ | ○○ | ○○ | ○○ | △△ | ○○ | ○○ | ○○ |
| 경도Hardness | ○○ | ○○ | XX | XX | ○○ | XX | ○○ | XX | ○○ |
| 내충격성impact resistance | XX | △△ | XX | △△ | XX | XX | ◎◎ | △△ | XX |
| 내수성water resistance | ○○ | ○○ | XX | ○○ | ○○ | XX | ◎◎ | XX | XX |
| 내용제성solvent resistance | ○○ | ○○ | ○○ | ○○ | ○○ | △△ | ○○ | △△ | ○○ |
| 내후성weatherability | ○○ | XX | ○○ | ○○ | XX | XX | ○○ | XX | ◎◎ |
[표 5] 내지 [표 7]에 제시된 바와 같이, 실시예의 조성물로부터 제조된 도막은 비교예의 조성물로부터 제조된 도막보다 물성이 우수함을 알 수 있었다.이하 본 발명의 다양한 실시형태를 설명한다.As shown in [Table 5] to [Table 7], it was found that the coating films prepared from the compositions of Examples had better physical properties than the coating films prepared from the compositions of Comparative Examples. Various embodiments of the present invention will be described below.
(1) 아크릴실란 수지, 폴리에스터 수지, 우레탄 올리고머, 실란 변성 폴리이소시아네이트 수지, 멜라민 수지, 및 아크릴 수지를 포함하며, 폴리에스터 수지는 수산기가(OHv)가 250 내지 400 mgKOH/g이고, 수평균분자량(Mn)이 350 내지 600 g/mol이며, 실란 변성 폴리이소시아네이트 수지는 수평균분자량(Mn)이 1,000 내지 4,000 g/mol인, 클리어 코트 조성물.(1) an acrylic silane resin, a polyester resin, a urethane oligomer, a silane-modified polyisocyanate resin, a melamine resin, and an acrylic resin, wherein the polyester resin has a hydroxyl value (OHv) of 250 to 400 mgKOH/g, and a number average A clear coat composition having a molecular weight (Mn) of 350 to 600 g/mol, and a number average molecular weight (Mn) of the silane-modified polyisocyanate resin of 1,000 to 4,000 g/mol.
(2) 아크릴실란 수지는 중량평균분자량(Mw)이 7,000 내지 9,000 g/mol이며, 수산기가(OHv)가 70 내지 100 mgKOH/g이며, 유리전이온도(Tg)가 30 내지 50℃인, 클리어 코트 조성물.(2) The acrylic silane resin has a weight average molecular weight (Mw) of 7,000 to 9,000 g/mol, a hydroxyl value (OHv) of 70 to 100 mgKOH/g, and a glass transition temperature (Tg) of 30 to 50 ° C. coat composition.
(3) 폴리에스터 수지는 한 분자 내에 2개 이상의 수산기를 갖는 폴리올 및 카르복실산으로부터 제조되고, 25℃에서의 점도가 800 내지 1,200 cps인, 클리어 코트 조성물.(3) A clear coat composition in which the polyester resin is prepared from a polyol having two or more hydroxyl groups in one molecule and a carboxylic acid, and has a viscosity of 800 to 1,200 cps at 25°C.
(4) 우레탄 올리고머는 수평균분자량(Mn)이 700 내지 1,300 g/mol이고, 유리전이온도가 -10 내지 -30 ℃인, 클리어 코트 조성물.(4) A clear coat composition wherein the urethane oligomer has a number average molecular weight (Mn) of 700 to 1,300 g/mol and a glass transition temperature of -10 to -30°C.
(5) 아크릴 수지는 중량평균분자량(Mw)이 6,000 내지 9,000 g/mol이고, 수산기가(OHv)가 110 내지 200 mgKOH/g이며, 유리전이온도(Tg)가 0.5 내지 10℃인, 클리어 코트 조성물.(5) The acrylic resin has a weight average molecular weight (Mw) of 6,000 to 9,000 g/mol, a hydroxyl value (OHv) of 110 to 200 mgKOH/g, and a glass transition temperature (Tg) of 0.5 to 10° C., a clear coat. composition.
(6) 조성물 전체 중량을 기준으로, 아크릴실란 수지 30 내지 50 중량%, 폴리에스터 수지 1 내지 12 중량%, 우레탄 올리고머 1 내지 15 중량%, 실란 변성 폴리이소시아네이트 수지 1 내지 15 중량%, 멜라민 수지 5 내지 25 중량%, 아크릴 수지 3 내지 20 중량%, 및 잔부의 용제를 포함하는, 클리어 코트 조성물.(6) Based on the total weight of the composition, 30 to 50% by weight of acrylsilane resin, 1 to 12% by weight of polyester resin, 1 to 15% by weight of urethane oligomer, 1 to 15% by weight of silane-modified polyisocyanate resin, 5 melamine resin to 25% by weight, 3 to 20% by weight of an acrylic resin, and the remainder a solvent.
Claims (6)
- 아크릴실란 수지, 폴리에스터 수지, 우레탄 올리고머, 실란 변성 폴리이소시아네이트 수지, 멜라민 수지, 및 아크릴 수지를 포함하며, Includes acrylic silane resins, polyester resins, urethane oligomers, silane-modified polyisocyanate resins, melamine resins, and acrylic resins,폴리에스터 수지는 수산기가(OHv)가 250 내지 400 mgKOH/g이고, 수평균분자량(Mn)이 350 내지 600 g/mol이며,The polyester resin has a hydroxyl value (OHv) of 250 to 400 mgKOH/g and a number average molecular weight (Mn) of 350 to 600 g/mol,실란 변성 폴리이소시아네이트 수지는 수평균분자량(Mn)이 1,000 내지 4,000 g/mol인, 클리어 코트 조성물.The silane-modified polyisocyanate resin has a number average molecular weight (Mn) of 1,000 to 4,000 g/mol, the clear coat composition.
- 청구항 1에 있어서, The method of claim 1,아크릴실란 수지는 중량평균분자량(Mw)이 7,000 내지 9,000 g/mol이며, 수산기가(OHv)가 70 내지 100 mgKOH/g이며, 유리전이온도(Tg)가 30 내지 50℃인, 클리어 코트 조성물.The acrylic silane resin has a weight average molecular weight (Mw) of 7,000 to 9,000 g/mol, a hydroxyl value (OHv) of 70 to 100 mgKOH/g, and a glass transition temperature (Tg) of 30 to 50 °C.
- 청구항 1에 있어서, The method of claim 1,폴리에스터 수지는 한 분자 내에 2개 이상의 수산기를 갖는 폴리올 및 카르복실산으로부터 제조되고, 25℃에서의 점도가 800 내지 1,200 cps인, 클리어 코트 조성물.The clear coat composition, wherein the polyester resin is prepared from a polyol having two or more hydroxyl groups in one molecule and a carboxylic acid, and has a viscosity of 800 to 1,200 cps at 25°C.
- 청구항 1에 있어서, The method of claim 1,우레탄 올리고머는 수평균분자량(Mn)이 700 내지 1,300 g/mol이고, 유리전이온도가 -10 내지 -30 ℃인, 클리어 코트 조성물.The urethane oligomer has a number average molecular weight (Mn) of 700 to 1,300 g/mol and a glass transition temperature of -10 to -30 °C.
- 청구항 1에 있어서, The method of claim 1,아크릴 수지는 중량평균분자량(Mw)이 6,000 내지 9,000 g/mol이고, 수산기가(OHv)가 110 내지 200 mgKOH/g이며, 유리전이온도(Tg)가 0.5 내지 10℃인, 클리어 코트 조성물.The acrylic resin has a weight average molecular weight (Mw) of 6,000 to 9,000 g/mol, a hydroxyl value (OHv) of 110 to 200 mgKOH/g, and a glass transition temperature (Tg) of 0.5 to 10 °C.
- 청구항 1에 있어서, The method of claim 1,조성물 전체 중량을 기준으로, 아크릴실란 수지 30 내지 50 중량%, 폴리에스터 수지 1 내지 12 중량%, 우레탄 올리고머 1 내지 15 중량%, 실란 변성 폴리이소시아네이트 수지 1 내지 15 중량%, 멜라민 수지 5 내지 25 중량%, 아크릴 수지 3 내지 20 중량%, 및 잔부의 용제를 포함하는, 클리어 코트 조성물.Based on the total weight of the composition, 30 to 50% by weight of acrylsilane resin, 1 to 12% by weight of polyester resin, 1 to 15% by weight of urethane oligomer, 1 to 15% by weight of silane-modified polyisocyanate resin, 5 to 25% by weight of melamine resin %, an acrylic resin of 3 to 20% by weight, and a clear coat composition containing the remainder of the solvent.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR20210083198 | 2021-06-25 | ||
| KR10-2021-0083198 | 2021-06-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2022270687A1 true WO2022270687A1 (en) | 2022-12-29 |
Family
ID=84544535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/KR2021/014288 WO2022270687A1 (en) | 2021-06-25 | 2021-10-14 | Clear coat composition |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2022270687A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0782525A (en) * | 1993-09-17 | 1995-03-28 | Showa Denko Kk | Coating resin composition |
| KR0140214B1 (en) * | 1988-11-28 | 1998-06-15 | 가네다 히로 | Primer composition |
| KR100434837B1 (en) * | 1996-12-06 | 2005-01-15 | 고려화학 주식회사 | Transparent top coat aqueous paint composition for low temperature baking comprising water dispersive resin composition containing urethane oligomer derived from reaction of alkylene carbonate and polyamide, curing resin, additive, and co-solvent |
| KR20200141175A (en) * | 2019-06-10 | 2020-12-18 | 주식회사 케이씨씨 | Clear coat composition for refinishing automobiles |
| KR20210039854A (en) * | 2019-10-02 | 2021-04-12 | 주식회사 케이씨씨 | Composition for clear coat |
-
2021
- 2021-10-14 WO PCT/KR2021/014288 patent/WO2022270687A1/en not_active Application Discontinuation
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0140214B1 (en) * | 1988-11-28 | 1998-06-15 | 가네다 히로 | Primer composition |
| JPH0782525A (en) * | 1993-09-17 | 1995-03-28 | Showa Denko Kk | Coating resin composition |
| KR100434837B1 (en) * | 1996-12-06 | 2005-01-15 | 고려화학 주식회사 | Transparent top coat aqueous paint composition for low temperature baking comprising water dispersive resin composition containing urethane oligomer derived from reaction of alkylene carbonate and polyamide, curing resin, additive, and co-solvent |
| KR20200141175A (en) * | 2019-06-10 | 2020-12-18 | 주식회사 케이씨씨 | Clear coat composition for refinishing automobiles |
| KR20210039854A (en) * | 2019-10-02 | 2021-04-12 | 주식회사 케이씨씨 | Composition for clear coat |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6573321B2 (en) | Non-staining coating composition | |
| US5221581A (en) | Coating composition of a glycidyl acrylic polymer, an aminoester acrylic polymer and a polyester or a polyesterurethane | |
| WO2020141733A1 (en) | Clear coating composition | |
| CA2089419A1 (en) | Coating composition of a glycidyl acrylic polymer, an aminoester acrylic polymer and a polyester or a polyesterurethane | |
| WO2018056637A1 (en) | Aqueous paint composition | |
| WO2021066440A2 (en) | Clear paint composition | |
| WO2022211400A1 (en) | Low-temperature curable one-component clear paint composition | |
| WO2019146911A1 (en) | Clear paint composition | |
| WO2019088551A1 (en) | Coating composition | |
| WO2022270687A1 (en) | Clear coat composition | |
| WO2022270686A1 (en) | Clear coat composition | |
| WO2023043126A1 (en) | Clear coat composition | |
| WO2022216029A1 (en) | Clear coat composition | |
| WO2020111568A1 (en) | Low-temperature-curable clear coating composition | |
| WO2022240149A1 (en) | Clear coat composition | |
| WO2020122486A2 (en) | Waterborne basecoat composition | |
| KR20180035397A (en) | Urethane Paint Composition | |
| WO2023200221A1 (en) | Clear coat composition | |
| EP3399002B1 (en) | Highly scratch resistant one-pack type paint composition | |
| WO2022235028A1 (en) | Clear coat composition | |
| WO2022211399A1 (en) | Low-temperature curing type clear coat composition | |
| KR101761489B1 (en) | One-component type paint composition with superior scratch resistance | |
| WO2021246746A1 (en) | Oil-based paint composition for automobile intermediate coating | |
| WO2023204583A1 (en) | Basecoat composition | |
| WO2023113256A1 (en) | Water-soluble polyisocyanate and water-soluble clear coat composition including same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WA | Withdrawal of international application | ||
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21947275 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |