CN117157366A - Organic solvent-based paint and method for producing precoated metal sheet - Google Patents
Organic solvent-based paint and method for producing precoated metal sheet Download PDFInfo
- Publication number
- CN117157366A CN117157366A CN202280027832.5A CN202280027832A CN117157366A CN 117157366 A CN117157366 A CN 117157366A CN 202280027832 A CN202280027832 A CN 202280027832A CN 117157366 A CN117157366 A CN 117157366A
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- China
- Prior art keywords
- organic solvent
- based paint
- resin
- coating
- curtain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000003960 organic solvent Substances 0.000 title claims abstract description 145
- 239000003973 paint Substances 0.000 title claims abstract description 123
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 45
- 239000002184 metal Substances 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 229920005989 resin Polymers 0.000 claims abstract description 68
- 239000011347 resin Substances 0.000 claims abstract description 68
- 239000004094 surface-active agent Substances 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000000576 coating method Methods 0.000 claims description 73
- 239000011248 coating agent Substances 0.000 claims description 68
- 239000007787 solid Substances 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 18
- 238000007766 curtain coating Methods 0.000 claims description 18
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 17
- 239000000049 pigment Substances 0.000 claims description 15
- 238000004040 coloring Methods 0.000 claims description 14
- 239000004645 polyester resin Substances 0.000 claims description 12
- 229920001225 polyester resin Polymers 0.000 claims description 12
- 229920000877 Melamine resin Polymers 0.000 claims description 10
- 239000012948 isocyanate Substances 0.000 claims description 10
- 150000002513 isocyanates Chemical class 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 239000004925 Acrylic resin Substances 0.000 claims description 6
- 229920000178 Acrylic resin Polymers 0.000 claims description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 6
- 239000011737 fluorine Substances 0.000 claims description 6
- 229910052731 fluorine Inorganic materials 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 28
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 10
- 239000000126 substance Substances 0.000 description 10
- 150000002148 esters Chemical class 0.000 description 8
- HJOVHMDZYOCNQW-UHFFFAOYSA-N isophorone Chemical compound CC1=CC(=O)CC(C)(C)C1 HJOVHMDZYOCNQW-UHFFFAOYSA-N 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- 239000000523 sample Substances 0.000 description 8
- 239000004640 Melamine resin Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 7
- -1 aminoalkyl acrylates Chemical class 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 6
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 6
- 229920000620 organic polymer Polymers 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 5
- 238000004566 IR spectroscopy Methods 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N ethylene glycol Natural products OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000000178 monomer Substances 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- 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 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- 150000007974 melamines Chemical class 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229920003270 Cymel® Polymers 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 2
- 239000004480 active ingredient Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000002981 blocking agent Substances 0.000 description 2
- QHIWVLPBUQWDMQ-UHFFFAOYSA-N butyl prop-2-enoate;methyl 2-methylprop-2-enoate;prop-2-enoic acid Chemical compound OC(=O)C=C.COC(=O)C(C)=C.CCCCOC(=O)C=C QHIWVLPBUQWDMQ-UHFFFAOYSA-N 0.000 description 2
- KORSJDCBLAPZEQ-UHFFFAOYSA-N dicyclohexylmethane-4,4'-diisocyanate Chemical compound C1CC(N=C=O)CCC1CC1CCC(N=C=O)CC1 KORSJDCBLAPZEQ-UHFFFAOYSA-N 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- 238000004817 gas chromatography Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- ZXEKIIBDNHEJCQ-UHFFFAOYSA-N isobutanol Chemical compound CC(C)CO ZXEKIIBDNHEJCQ-UHFFFAOYSA-N 0.000 description 2
- 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 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002987 primer (paints) Substances 0.000 description 2
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 238000005979 thermal decomposition reaction Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- FZENGILVLUJGJX-NSCUHMNNSA-N (E)-acetaldehyde oxime Chemical compound C\C=N\O FZENGILVLUJGJX-NSCUHMNNSA-N 0.000 description 1
- ROHUXHMNZLHBSF-UHFFFAOYSA-N 1,4-bis(isocyanatomethyl)cyclohexane Chemical compound O=C=NCC1CCC(CN=C=O)CC1 ROHUXHMNZLHBSF-UHFFFAOYSA-N 0.000 description 1
- SBJCUZQNHOLYMD-UHFFFAOYSA-N 1,5-Naphthalene diisocyanate Chemical compound C1=CC=C2C(N=C=O)=CC=CC2=C1N=C=O SBJCUZQNHOLYMD-UHFFFAOYSA-N 0.000 description 1
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 description 1
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- QMYGFTJCQFEDST-UHFFFAOYSA-N 3-methoxybutyl acetate Chemical compound COC(C)CCOC(C)=O QMYGFTJCQFEDST-UHFFFAOYSA-N 0.000 description 1
- MGYGFNQQGAQEON-UHFFFAOYSA-N 4-tolyl isocyanate Chemical compound CC1=CC=C(N=C=O)C=C1 MGYGFNQQGAQEON-UHFFFAOYSA-N 0.000 description 1
- JHRDMNILWGIFBI-UHFFFAOYSA-N 6-diazenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(N=N)=N1 JHRDMNILWGIFBI-UHFFFAOYSA-N 0.000 description 1
- 101100243456 Arabidopsis thaliana PES2 gene Proteins 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- 229920003275 CYMEL® 325 Polymers 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 101001073193 Homo sapiens Pescadillo homolog Proteins 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
- BERUYWADDMBJIO-UHFFFAOYSA-N N=C=O.NC(=O)NC(N)=O Chemical compound N=C=O.NC(=O)NC(N)=O BERUYWADDMBJIO-UHFFFAOYSA-N 0.000 description 1
- 101100294638 Neosartorya fumigata (strain ATCC MYA-4609 / Af293 / CBS 101355 / FGSC A1100) NRPS8 gene Proteins 0.000 description 1
- 102100035816 Pescadillo homolog Human genes 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 description 1
- 101100243457 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) PES4 gene Proteins 0.000 description 1
- PXAJQJMDEXJWFB-UHFFFAOYSA-N acetone oxime Chemical compound CC(C)=NO PXAJQJMDEXJWFB-UHFFFAOYSA-N 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000003926 acrylamides Chemical class 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 125000002947 alkylene group Chemical group 0.000 description 1
- 239000004599 antimicrobial Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 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
- 239000006231 channel black Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 229930003836 cresol Natural products 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- FSEUPUDHEBLWJY-HWKANZROSA-N diacetylmonoxime Chemical compound CC(=O)C(\C)=N\O FSEUPUDHEBLWJY-HWKANZROSA-N 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- BEPAFCGSDWSTEL-UHFFFAOYSA-N dimethyl malonate Chemical compound COC(=O)CC(=O)OC BEPAFCGSDWSTEL-UHFFFAOYSA-N 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000921 elemental analysis Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical compound CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 1
- 239000006232 furnace black Substances 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 229940035429 isobutyl alcohol Drugs 0.000 description 1
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 1
- JMMWKPVZQRWMSS-UHFFFAOYSA-N isopropanol acetate Natural products CC(C)OC(C)=O JMMWKPVZQRWMSS-UHFFFAOYSA-N 0.000 description 1
- 229940011051 isopropyl acetate Drugs 0.000 description 1
- GWYFCOCPABKNJV-UHFFFAOYSA-N isovaleric acid Chemical compound CC(C)CC(O)=O GWYFCOCPABKNJV-UHFFFAOYSA-N 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- IONSZLINWCGRRI-UHFFFAOYSA-N n'-hydroxymethanimidamide Chemical compound NC=NO IONSZLINWCGRRI-UHFFFAOYSA-N 0.000 description 1
- DNYZBFWKVMKMRM-UHFFFAOYSA-N n-benzhydrylidenehydroxylamine Chemical compound C=1C=CC=CC=1C(=NO)C1=CC=CC=C1 DNYZBFWKVMKMRM-UHFFFAOYSA-N 0.000 description 1
- WHIVNJATOVLWBW-UHFFFAOYSA-N n-butan-2-ylidenehydroxylamine Chemical compound CCC(C)=NO WHIVNJATOVLWBW-UHFFFAOYSA-N 0.000 description 1
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- NRNFFDZCBYOZJY-UHFFFAOYSA-N p-quinodimethane Chemical group C=C1C=CC(=C)C=C1 NRNFFDZCBYOZJY-UHFFFAOYSA-N 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 125000005010 perfluoroalkyl group Chemical group 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- WVDDGKGOMKODPV-ZQBYOMGUSA-N phenyl(114C)methanol Chemical compound O[14CH2]C1=CC=CC=C1 WVDDGKGOMKODPV-ZQBYOMGUSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
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- 238000000550 scanning electron microscopy energy dispersive X-ray spectroscopy Methods 0.000 description 1
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- 230000003746 surface roughness Effects 0.000 description 1
- 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 1
- 238000012546 transfer Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 125000002256 xylenyl group Chemical class C1(C(C=CC=C1)C)(C)* 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
-
- 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
- C08L33/04—Homopolymers or copolymers of esters
-
- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
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- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- 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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
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- 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
- C09D7/20—Diluents or solvents
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- 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
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
Abstract
An organic solvent-based paint comprising a resin having a number average molecular weight of more than 1500 and less than 10000, a surfactant, and an organic solvent, wherein the organic solvent-based paint has a dynamic surface tension measured by a maximum bubble pressure method of 36 to 50mN/m in terms of bubble lifetime of 0.05 seconds and 32 to 45mN/m in terms of bubble lifetime of 0.5 seconds, and a method for producing a precoated metal sheet using the paint.
Description
Technical Field
The present disclosure relates to a method for producing an organic solvent-based coating material and a precoated metal sheet.
Background
Precoated metal sheets are widely used for housings and construction materials for home appliances. The precoated metal sheet is generally a metal sheet having a chemical conversion treatment layer, a primer layer, and a top layer laminated on the surface of the metal sheet. Each layer is coated and baked in sequence and laminated on a metal plate of a continuous through plate. Most of the coating of each layer uses a roll coater. The top layer of the precoated metal sheet is a layer for securing design. If there is a coating defect in the top layer, the design is impaired, and the commodity value is impaired. In particular uniformity is required for the top layer.
The precoated metal sheet is continuously produced, wound into a coil shape in several km to several tens km units, stored, and transported. In order to increase the productivity of the precoated metal sheet, the sheet passing speed of the metal sheet must be increased.
The roll coater applies a coating by bringing the roll into contact with the metal plate with a negative gap. The film thickness follows the roll peripheral speed/through-plate speed. The higher the through-plate speed, the higher the speed at which the roller must be rotated. When the rotational speed of the roller is increased, scattering of the paint or a coating defect (surface roughness) in the form of a rope generated during paint transfer is liable to occur. Therefore, in the case of a roll coater, high-speed passing is difficult.
As a coating method which is more uniform than a roll coater, a curtain coater is known. The curtain coater causes the coating to fall freely to form a curtain film. The coating is performed by passing a metal plate through a curtain film. Since the film thickness is adjusted by the coating flow rate, coating defects such as scattering of the coating material and surface irregularities are less likely to occur as in a roll coater, and a uniform coating appearance is easily obtained.
In the case of applying the curtain coater to a coated metal sheet manufacturing process, it is necessary to form a stable curtain film with a paint. The coating material having poor stability of the curtain film has problems such as the curtain film not being formed, the curtain film instantaneously becoming non-formed and causing discoloration, and is not suitable for continuous production.
As a method for stably forming a curtain film, studies have been made focusing on the molecular weight of a resin in a coating material.
For example, patent document 1 discloses that a stable curtain film can be formed by setting the number average molecular weight of a resin contained in a paint to 10000 or more.
Patent document 1: japanese patent laid-open No. 11-152448
Disclosure of Invention
Problems to be solved by the invention
However, as disclosed in patent document 1, when curtain coating is performed using a coating material having a resin number average molecular weight of less than 10000, the curtain film is easily cut, and the curtain film stability is poor. Therefore, it is necessary to apply the coating by a roll coater, and it is difficult to increase the pass speed.
On the other hand, resins having a number average molecular weight of less than 10000 are easily melted in an organic solvent as compared with resins having a large number average molecular weight. Therefore, the solid content concentration can be easily increased, and the paint cost can be reduced. Further, since the molecular weight between the crosslinking points is smaller than that of a resin having a large number average molecular weight, a coating film having a high hardness and excellent stain resistance can be formed.
Therefore, curtain coating of a coating material using a resin having a number average molecular weight of less than 10000, that is, curtain film stability is desired. On the other hand, curtain coating is also required to have defoaming properties because the paint is recycled.
Accordingly, an object of the present disclosure is to provide an organic solvent-based paint that is excellent in curtain film stability and defoaming property even when a resin having a number average molecular weight of less than 10000 is used, and that can be curtain coated, and a method for producing a precoated metal sheet using the paint, which is excellent in productivity.
Means for solving the problems
The means for solving the above problems include the following means.
<1> an organic solvent-based paint comprising a resin, a surfactant and an organic solvent,
the number average molecular weight of the above resin exceeds 1500 and is less than 10000,
the dynamic surface tension of the organic solvent-based paint measured by the maximum bubble pressure method is 36 to 50mN/m in terms of bubble lifetime of 0.05 seconds and 32 to 45mN/m in terms of bubble lifetime of 0.5 seconds,
the coating is used for curtain coating.
<2> the organic solvent-based paint according to <1>, wherein a coloring pigment is contained.
<3> the organic solvent-based paint according to <1> or <2>, wherein the resin is a resin other than a fluorine-containing resin.
The organic solvent-based paint according to any one of <1> to <3>, wherein the resin is at least 1 selected from the group consisting of a polyester resin, an acrylic resin and a urethane resin.
The organic solvent-based paint according to any one of <1> to <4>, wherein the solid content concentration of the organic solvent-based paint is 20 to 70% by mass.
The organic solvent-based paint according to any one of <1> to <5>, wherein the organic solvent-based paint further comprises a curing agent, and the curing agent comprises at least 1 selected from the group consisting of melamine resins and isocyanates.
The organic solvent-based paint according to any one of <1> to <6>, wherein the concentration of the resin is 5 to 50% by mass relative to the organic solvent-based paint.
The organic solvent-based paint according to any one of <1> to <7>, wherein the concentration of the surfactant is 0.05 to 0.80 mass% relative to the organic solvent-based paint.
<9> a method for producing a precoated metal sheet, comprising the steps of:
a step of discharging the organic solvent-based paint according to any one of <1> to <8> to form a curtain film having a height of 50 to 500mm, and continuously coating a metal plate with the curtain film to form a coating film; and
and drying and/or curing the coating film to form a precoat layer.
Effects of the invention
According to the present disclosure, an organic solvent-based paint that is excellent in curtain film stability and defoaming property even when a resin having a number average molecular weight of less than 10000 is used and that can be curtain coated, and a method for producing a precoated metal sheet using the paint with excellent productivity can be provided.
Detailed Description
An embodiment as an example of the present disclosure will be described.
In the present specification, a numerical range indicated by "to" refers to a range including these numerical values as a lower limit value and an upper limit value when values described before and after "to" are not "exceeded" or "fallen below". The numerical range in which the numerical values described before and after "to" are labeled "exceeding" or "falling below" means a range that does not include these numerical values as a lower limit value or an upper limit value.
In the numerical ranges described in the present specification in stages, the upper limit of the numerical range in a stage may be replaced with the upper limit of the numerical range described in another stage, or may be replaced with the value shown in the examples. The lower limit of the numerical range of a certain stage may be replaced with the lower limit of the numerical range described in another stage, or may be replaced with the value shown in the example.
The organic solvent-based paint of the present disclosure contains a resin, a surfactant, and an organic solvent, and is an organic solvent-based paint for curtain coating.
In the organic solvent-based paint of the present disclosure, the number average molecular weight of the resin exceeds 1500 and is less than 10000, and the dynamic surface tension of the organic solvent-based paint, which is measured by the maximum bubble pressure method of the organic solvent-based paint, is 36 to 50mN/m in terms of bubble lifetime of 0.05 seconds and 32 to 45mN/m in terms of bubble lifetime of 0.5 seconds.
The organic solvent-based paint of the present disclosure has excellent curtain film stability and defoaming properties even when a resin having a number average molecular weight of less than 10000 is used by the above-described constitution, and curtain coating can be performed.
Further, the organic solvent-based paint of the present disclosure was found by the following findings.
The inventors studied on an organic solvent-based coating material excellent in curtain film stability and defoaming property even when a resin having a number average molecular weight of less than 10000 is used. As a result, the following findings were obtained.
In curtain coating, in order to make the curtain film difficult to cut, it is preferable that the surfactant is not oriented at the gas-liquid interface of the curtain film and cannot function as the surfactant until the curtain film is discharged to the surface of the metal plate.
On the other hand, in order to improve the defoaming property of the organic solvent-based paint, the surfactant is preferably oriented at the gas-liquid interface of the organic solvent-based paint to function as a surfactant.
In order to create the above-described situation, it is preferable to reduce the movement speed of the surfactant in the organic solvent-based paint. This reduces the adsorption rate to the gas-liquid interface of the curtain film, thereby preventing uneven surface tension and cutting the curtain film. Further, after the coating, the gas-liquid interface of the organic solvent-based coating material is adsorbed, so that unevenness in surface tension is generated, and defoaming is also possible.
In order to reduce the movement speed of the surfactant in the organic solvent-based paint, the dynamic surface tension of the organic solvent-based paint measured by the maximum bubble pressure method, that is, the dynamic surface tension in terms of bubble lifetime of 0.05 seconds and the dynamic surface tension in terms of bubble lifetime of 0.5 seconds can be controlled to the above ranges by adjusting the difference between hansen solubility parameters HSP of the resin and the surfactant.
From the above findings, it was found that: the organic solvent-based coating material of the present disclosure is excellent in curtain film stability and defoaming property even when a resin having a number average molecular weight of less than 10000 is used, and can be curtain coated.
Hereinafter, details of the organic solvent-based paint of the present disclosure will be described.
The organic solvent-based coating of the present disclosure includes a resin, a surfactant, and an organic solvent. The organic solvent-based paint of the present disclosure may also contain a coloring pigment, a curing agent, and the like.
[ resin ]
The number average molecular weight of the resin exceeds 1500 and is less than 10000, preferably 2000 to less than 10000, more preferably 3000 to less than 10000.
When the number average molecular weight of the resin is in the above range, the coating viscosity can be reduced as compared with an organic solvent-based coating having a resin molecular weight of 10000 or more. As a result, the amount of the organic solvent added to secure the paint manufacturing process or the coatability can be reduced, and the solid content concentration of the organic solvent-based paint can be increased. As a result, when the same film thickness is coated with the same coating unit price (kg/unit), the cost for coating can be reduced. The organic solvent-based paint having a high solid content has a large coatable area if it has the same film thickness. Therefore, the transportation cost of the organic solvent-based paint can be reduced. In addition, it is necessary to burn the organic solvent volatilized from the organic solvent-based paint at the time of manufacturing the precoated metal sheet, and to reduce the concentration of volatile organic solvent (VOC) emitted into the atmosphere. The organic solvent-based paint having a high solid content concentration is relatively inexpensive with respect to the cost of burning the organic solvent. Further, since the resin having a small number average molecular weight and an increased hydroxyl value has a small molecular weight between crosslinking points, it is easy to form a coating film having excellent hardness and contamination properties by optimizing the curing amount.
When resins having different number average molecular weights are used in combination, the number average molecular weight of the resins is the number average molecular weight of the weighted average.
The method for measuring the number average molecular weight of the resin is as follows.
After the organic solvent-based paint was centrifuged, the paint supernatant was measured so as to be 20mg as a resin solid component.
The obtained sample was dissolved in 10ml of Tetrahydrofuran (THF), and then measured by gel permeation chromatography (GPC, HLC8220 GPC, column Shodex KF type, east soh corporation) at a pump flow rate of 0.6ml/min and a temperature of 40 ℃. Then, the number average molecular weight of the resin was calculated from the chromatogram based on the molecular weight of the standard polystyrene.
The resin is not particularly limited, and examples thereof include known resins applicable to organic solvent-based paints, such as polyester resins, polyurethane resins, acrylic resins, fluorine-containing resins, and epoxy resins. These resins may be used alone in an amount of 1 or 2 or more kinds thereof may be blended and used.
Among them, the resin is preferably at least 1 selected from the group consisting of polyester resins, acrylic resins and urethane resins, more preferably at least 1 selected from the group consisting of polyester resins and urethane resins, which are easy to combine with other properties.
As the resin, a resin other than a fluorine-containing resin is preferable.
Since the fluorine-containing resin is expensive and has low following property with respect to processing, the use of the organic solvent-based coating material is easily limited when the fluorine-containing resin is used.
The type of the resin can be determined by a known method. For example, the type of the resin is specified by measuring a sample obtained by drying the centrifuged organic solvent-based paint by infrared absorption spectroscopy (IR), thermal decomposition gas chromatography, or the like.
The concentration of the resin is preferably 5 to 50% by mass, more preferably 10 to 45% by mass, relative to the organic solvent-based paint.
When the concentration of the resin is set to the above range, the solid content concentration of the organic solvent-based paint can be increased, and the cost for coating can be reduced.
[ organic solvent ]
The organic solvent is a solvent other than water for dissolving the resin. In addition, the organic solvent must remain in a liquid state without reacting even if a curing agent, a coloring pigment, a surfactant, or the like is added.
The organic solvent is not particularly limited, and a known solvent can be used. Examples of the organic solvent include ester-based organic solvents such as 3-methoxybutyl acetate, ethyl acetate, isopropyl acetate, and butyl acetate; ketone-based organic solvents such as methyl ethyl ketone, acetone, methyl isobutyl ketone, cyclohexanone, isophorone, SOLVESSO 100 (ExxonMobil corporation), SOLVESSO 150 (ExxonMobil corporation), and the like.
These organic solvents may be used alone or in combination of 2 or more kinds in any ratio.
From the viewpoint of curtain formability, the content of the organic solvent is preferably the remainder other than the solid component. That is, when the organic solvent-based paint is set to 100% by mass as a whole, the content of the organic solvent is preferably a value obtained by subtracting the solid content concentration of the paint from the whole organic solvent-based paint (the solid content concentration of the organic solvent-based paint-whole).
[ surfactant ]
The surfactant has both the function of defoaming bubbles generated in the organic solvent-based paint and the function of stably forming a curtain film.
Examples of the surfactant include an acrylic surfactant, a silicone surfactant, and a fluorine-modified silicone surfactant.
The acrylic surfactant may be a copolymer of acrylic monomers.
Examples of the acrylic monomer include alkyl acrylates, alkylene oxide acrylates, alkyl (meth) acrylate esters, aminoalkyl acrylates, and acrylamide compounds.
Examples of the silicone surfactant include polydimethylsiloxanes obtained by modifying the terminal of a side chain or a main chain with alkylene glycol (ethylene glycol, propylene glycol, etc.).
Examples of the fluorine-modified silicone surfactant include those obtained by substituting a part of the silicone surfactant with a perfluoroalkyl group.
The concentration of the surfactant is preferably 0.05 to 0.80 mass%, more preferably 0.10 to 0.50 mass% relative to the organic solvent-based paint.
When the concentration of the surfactant is set to the above range, the dynamic surface tension of the organic solvent-based paint can be controlled, and the curtain film stability and defoaming property can be easily improved.
[ coloring pigment ]
The coloring pigment is not particularly limited, and known coloring pigments can be used.
Examples of the coloring pigment include titanium oxide, carbon black (furnace black, ketjen black, acetylene black, channel black), iron oxide, aluminum, mica, and the like.
The type of the coloring pigment can be determined by a known method. For example, the type of the coloring pigment can be specified by elemental analysis by SEM-EDX or X-ray crystallization diffraction measurement of the coating film or the precipitate after centrifugal separation.
The concentration of the coloring pigment is preferably 2 to 45% by mass, more preferably 10 to 40% by mass, relative to the organic solvent-based paint.
[ curing agent ]
The curing agent is a substance that cures the resin.
As the curing agent, a known curing agent can be used. As the curing agent, a curing agent that reacts in the baking step of the coating film is preferable because of excellent storage stability.
As the curing agent, for example, at least 1 selected from the group consisting of melamine resins and isocyanates is preferable.
The melamine resin may preferably be methylated melamine, iminomelamine or butylated melamine. The melamine resin is a resin having a number average molecular weight of 1500 or less.
The isocyanate may preferably be a blocked isocyanate. The blocked isocyanate is an isocyanate obtained by blocking a base isocyanate with a blocking agent.
As the basic isocyanate, 1, 4-tetramethylene diisocyanate, 1, 6-hexamethylene diisocyanate, 1, 12-dodecamethylene diisocyanate, cyclohexane-1, 3-or 1, 4-diisocyanate, 1-isocyanato-3-isocyanatomethyl-3, 5-trimethylcyclohexane (alias isophorone diisocyanate; IPDI), dicyclohexylmethane-4, 4' -diisocyanate (alias: hydrogenated MDI), 2-or 4-isocyanatocyclohexyl-2 ' -isocyanatocyclohexyl methane, 1, 3-or 1, 4-bis- (isocyanatomethyl) -cyclohexane, bis- (4-isocyanatomethyl-3-methylcyclohexyl) methane, 1, 3-or 1,4- α, α, α ' -tetramethyl xylylene diisocyanate, 2, 4-or 2, 6-diisocyanatotoluene, 2' -, 2,4' -or 4,4' -diisocyanato diphenylmethane (MDI), 1, 5-naphthalene diisocyanate, p-xylylene, 4' -diisocyanate, m-xylylene, etc. may be mentioned. Further, cyclized polymers (isocyanurate type), further isocyanate-biuret (biuret type), and adduct type of each diisocyanate are exemplified.
Examples of the blocking agent include phenol, cresol, xylenol, epsilon-caprolactam, sigma-valerolactam, gamma-butyrolactam, methanol, ethanol, n-butyl alcohol, isobutyl alcohol, t-butyl alcohol, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, benzyl alcohol, formamide oxime, aldoxime, acetone oxime, methyl ethyl ketone oxime, diacetyl monooxime, benzophenone oxime, cyclohexane oxime, dimethyl malonate, ethyl acetoacetate, acetylacetone, and pyrazole.
The type of the curing agent can be determined by a known method. For example, the type of the curing agent is specified by performing measurement such as infrared absorption spectroscopy (IR) or thermal decomposition gas chromatography on a sample obtained by drying the organic solvent-based paint subjected to centrifugal separation.
The concentration of the curing agent is preferably 15 to 55% by mass, more preferably 20 to 50% by mass, based on the resin.
[ other additives ]
The organic solvent-based paint of the present disclosure may contain other known additives such as a catalyst, wax, ultraviolet absorber, antioxidant, plasticizer, coupling agent, pigment dispersant, anti-settling agent, and antimicrobial agent.
From the viewpoint of curtain formability, the organic solvent-based paint of the present disclosure preferably contains no water.
However, the water is set to be tolerant of unintended water mixing such as adsorption of moisture contained in the air and mixing of water adhering to the packaging material of the organic solvent-based paint.
From the viewpoint of curtain formability, the content of water in the organic solvent-based paint of the present disclosure is preferably 0 mass% or more and less than 10 mass%, more preferably 0 mass% or more and 5 mass% or less, and still more preferably 0 mass% relative to the entire organic solvent-based paint.
[ concentration of solid content ]
The solid content concentration of the organic solvent-based coating material of the present disclosure is not particularly limited as long as the dynamic surface tension can be suitably controlled.
The solid content concentration of the organic solvent-based paint of the present disclosure is preferably 20 to 70% by mass, more preferably 30 to 60% by mass.
When the solid content concentration of the organic solvent-based paint is set to 20 mass% or more, the occurrence of paint defects called dents due to bumping of the organic solvent can be suppressed.
When the solid content concentration of the organic solvent-based paint is 70 mass% or less, a decrease in the storage stability of the organic solvent-based paint can be suppressed.
The solid content concentration of the organic solvent-based paint can be calculated from the mass of the sample before and after drying by taking a sample (about 2 g) from the organic solvent-based paint into an aluminum cup, drying the sample in an oven at 105 ℃ for 3 hours.
[ dynamic surface tension ]
The organic solvent-based coating of the present disclosure is produced by controlling the dynamic surface tension when measured by the maximum bubble pressure method.
Specifically, the dynamic surface tension of the organic solvent-based paint obtained by measuring the organic solvent-based paint of the present disclosure by the maximum bubble pressure method is 36 to 50mN/m in terms of bubble lifetime of 0.05 seconds, and is 32 to 45mN/m in terms of bubble lifetime of 0.5 seconds.
When the dynamic surface tension is within these ranges, both curtain stability and defoaming property can be achieved.
The dynamic surface tension can be adjusted by the kinds of the resin and the surfactant, and the concentration of the surfactant.
The dynamic surface tension of the organic solvent-based coating material can be measured by the maximum bubble pressure method, and can be measured, for example, by using DP-51, a product of the science of co-ordination and interfacial science. Specifically, the following is described.
In order to stabilize the pressure at the beginning and end of the measurement, the dynamic surface tension was measured until the bubble lifetime was changed from 0.01 seconds to 5 seconds, and the dynamic surface tension was obtained when the bubble lifetime was 0.05 seconds and 0.5 seconds.
The probe diameter was measured using a 1mm probe with the air in the pot in the apparatus set at 100%.
In the case where the viscosity of the organic solvent-based paint is high and the dynamic surface tension cannot be measured, the measurement may be performed by increasing the paint temperature (reducing the paint viscosity). The dynamic surface tension does not change even if the temperature of the paint is increased or the viscosity is decreased. The coating temperature at the time of dynamic surface tension measurement is preferably set to a range of 10 to 60 ℃. If the temperature is too high, the organic solvent as the solvent may volatilize, and the dynamic surface tension may change.
[ use of organic solvent-based coating materials ]
The use of the organic solvent-based coating material of the present disclosure is not particularly limited, and for example, it can be used in coating of metal surfaces.
The organic solvent-based paint of the present disclosure is preferably used as a paint for manufacturing a precoated metal sheet by curtain coating. Since the organic solvent-based coating material of the present disclosure is excellent in curtain film stability and defoaming property, a precoated metal having a coating film excellent in hardness and stain resistance can be obtained by curtain coating.
In particular, the organic solvent-based coating material of the present disclosure is preferably used as a coating material for forming the top layer of a precoated metal sheet. The organic solvent-based paint of the present disclosure contains a resin having a number average molecular weight of more than 1500 and less than 10000. Therefore, this is because the molecular weight between the crosslinking points is smaller than that of a resin having a large number average molecular weight (for example, a resin having a number average molecular weight of 10000 or more), and therefore a coating film which is hard and excellent in stain resistance can be formed.
Since the top layer of the precoated metal sheet may require design properties, it is preferable to include a coloring pigment in the paint forming the top layer of the precoated metal sheet. Therefore, in the case of being used as a paint for forming the top layer of the precoated metal sheet, the organic solvent-based paint of the present disclosure preferably contains a coloring pigment.
[ method for producing precoated Metal sheet ]
The method for producing a precoated metal sheet of the present disclosure is a method comprising the steps of: a step of discharging the organic solvent-based paint of the present disclosure to form a curtain film having a height of 50 to 500mm, and continuously coating a metal plate with the curtain film to form a coated film (hereinafter also referred to as a "first step"); and a step (hereinafter also referred to as "second step") of drying and/or curing the coated film to form a precoat layer.
First procedure-
In the first step, the method of applying the organic solvent-based paint to the metal plate is curtain coating. The height of the curtain film of the organic solvent-based paint during curtain coating is set to 50 to 500mm.
By setting the height of the curtain film to 50mm or more, contact between the metal plate and the curtain coater can be suppressed. Therefore, even if the flatness of the metal plate is poor, continuous curtain coating can be performed.
By setting the height of the curtain film to 500mm or less, discoloration of the curtain film due to instantaneous cutting of the curtain film, which is called spot-like rounding, can be suppressed.
The height of the curtain film of the organic solvent-based paint in curtain coating is preferably 100 to 300mm.
The type of curtain coater used for curtain coating is not particularly limited, and a known curtain coater can be used. For example, a curtain coater may be a roll curtain coater, a slide curtain coater, or a slit curtain coater.
In curtain coating, the width of the curtain coater and the sheet passing speed of the metal sheet are not particularly limited. The coating flow rate may be appropriately set according to the organic solvent-based coating material used, as long as it can stably form a curtain film.
The metal plate to be subjected to curtain coating is not particularly limited, and a known metal plate can be used. For example, the metal plate may be a steel plate, an aluminum plate, a stainless steel plate, or the like. In the case where the metal plate is a steel plate, zinc-based plated steel plate, aluminum-plated steel plate, tin-plated steel plate, or the like can be used. As the steel sheet, a zinc-based plated steel sheet is preferable from the viewpoint of corrosion resistance.
Second procedure-
In the second step, a precoated metal sheet can be obtained by forming a coating film on the surface of a metal sheet using the curtain film of the organic solvent-based coating material of the present disclosure, and then drying and/or curing the coating film to prepare a precoated layer.
The drying conditions and curing conditions of the coating film may be appropriately set according to the organic solvent-based coating material used.
Before the organic solvent-based coating material is applied to the metal plate, a known chemical conversion coating film or a known primer coating film may be applied.
Examples
Hereinafter, examples and comparative examples are shown, and the organic solvent-based paint and the coating method thereof of the present disclosure will be specifically described. The examples shown below are merely examples of the organic solvent-based paint and the coating method of the present disclosure, and the organic solvent-based paint and the coating method of the present disclosure are not limited to the examples described below.
< preparation of organic solvent-based coating material >
Coating 1
"DYNAPL LH724", a polyester resin manufactured by Evonik corporation, was dissolved in an organic solvent (a solvent obtained by mixing cyclohexanone: solvosiso 150 (trade name) =1:1 in terms of mass ratio).
After that, titanium oxide "CR-90" produced by stone raw product was added and dispersed, and then, methylated melamine resin "CYMEL (registered trademark) 303" produced by Allnex Japan Co., ltd. As a curing agent was added to the above-mentioned base. The mass ratio of the polyester resin to the mixed melamine resin is 100: 35.
To this mixing base, 0.5 mass% of "Catalyst 600" which is an acidic Catalyst made by Allnex Japan, and 0.15 mass% of a surfactant (surface conditioner) made by co-company chemical, inc. In terms of the active ingredient concentration, namely, POLYFLOW No.50E were further added and stirred. Then, the same organic solvent as that used to dissolve the resin was added to adjust the solid content concentration, thereby obtaining a coating material 1.
Coating materials 2-45
Coatings 2 to 45 were prepared by changing the various raw materials and concentrations of coating 1 according to table 7.
The material types used for producing the organic solvent-based paint are shown in tables 2 to 6.
The urethane resins 1 to 3 were produced by the following methods.
[ preparation of urethane resin 1 (ester-based urethane resin 1) ]
In a reaction vessel equipped with a thermometer, a condenser and a stirrer, 55 parts by mass of adipic acid, 6.1 parts by mass of phthalic anhydride, 27 parts by mass of neopentyl glycol and 26.1 parts by mass of propylene glycol were mixed, and the temperature was gradually raised to 230℃in a nitrogen stream, and the resultant water was distilled off, followed by an esterification reaction for about 10 hours until the acid value became 1 or less (dehydration amount: 14.2 parts by mass). After that, the temperature of the reaction vessel was lowered to 50 ℃, 133 parts by mass of cyclohexanone and 33 parts by mass of 4,4' -diphenylmethane diisocyanate were mixed and kept at 80 ℃ for 8 hours to react, thereby obtaining an ester-based urethane resin 1 (solid content: 50 mass%).
[ preparation of urethane resins 2 to 3 (ester-based urethane resins 2 to 3) ]
Ester-based urethane resins 2 to 3 were produced in the same manner as described above, except that the monomer types and amounts were changed as shown in table 1. The monomer composition and specific values such as molecular weight in each resin are shown below.
TABLE 1
< dynamic surface tension >
The following dynamic surface tension measured by the maximum bubble pressure method was measured by the method described above for the organic solvent-based paint produced. The coating temperature was set at 50 ℃.
Bubble lifetime (BLT in the Table) dynamic surface tension (mN/m) at 0.05 seconds
Bubble lifetime (BLT in the Table) dynamic surface tension (mN/m) at 0.5 seconds
< defoaming Property >
The defoaming property was checked using the prepared organic solvent-based paint. 180mL of the organic solvent-based paint was taken into a round pot having a capacity of 200mL, and the surface of the organic solvent-based paint was foamed by stirring at 2000rpm X2 minutes with a stirrer. Then, the bubble occupancy area of the surface of the organic solvent-based paint after standing for 3 minutes was visually observed, and evaluated according to the following evaluation criteria. And setting the paint with the score of more than 3 points as qualified.
Evaluation criterion-
5: the occupied area of bubbles is lower than 10%
4: the bubble occupation area is more than 10% and less than 20%
3: the bubble occupation area is more than 20% and less than 30%
2: the bubble occupation area is more than 30% and less than 50%
1: the occupied area of bubbles is more than 50%
< curtain film stability >
An organic solvent-based coating material was supplied to a slide curtain coater (width: 350 mm) by a pump to form a curtain film. The coating flow rate was set to a flow rate at which the dry film thickness became 15 μm at a plate passing speed of 80 m/min. For the organic solvent-based paint capable of forming a curtain film, the curtain film was continuously formed for 30 minutes under a condition that the paint flow rate was constant. The state of the curtain film was visually observed, and the number of times the curtain was cut was examined. The stability of the curtain film was evaluated according to the following evaluation criteria. A score of 3 or more was set as pass. The height of the curtain film was set to the height shown in table 7.
Evaluation criterion-
5: the curtain film cutting times are 0 times
4: the curtain film cutting times are more than 1 time and less than 5 times
3: the curtain film cutting times are more than 6 times and less than 10 times
2: the curtain film cutting times are more than 11 times
1: failure to form curtain film
TABLE 2
Resin composition
| Leveling level | Species of type | Manufacturer (S) | Model number | Number average molecular weight | Concentration of solid content (%) |
| PES1 | Polyester resin | Evonik | DYNAPL LH724 | 2000 | 70 |
| PES2 | Polyester resin | DIC | BECKOLITE M-6952-50 | 11700 | 50 |
| PES3 | Polyester resin | Eternal Material | ETERKYD 3103-X-70 | 1500 | 70 |
| PES4 | Polyester resin | Dongyang spinning | BYLON 63CS | 14600 | 33 |
| PES5 | Polyester resin | Evonik | DYNAPL LH538 | 3000 | 65 |
| AC1 | Acrylic resin | DIC | ACRYDIC A830 | 3000 | 60 |
| AC2 | Acrylic resin | Mitsubishi chemistry | DIANAL A-200 | 12500 | 60 |
| UR1 | Urethane resin | NIPPONPAINT finished product | Ester urethane resin 1 | 3000 | 50 |
| UR2 | Urethane resin | NIPPONPAINT finished product | Ester urethane resin 2 | 9000 | 50 |
| UR3 | Urethane resin | NIPPONPAINT finished product | Ester urethane resin 3 | 1000 | 50 |
TABLE 3
Surface active agent
| Leveling level | Species of type | Manufacturer (S) | Model number | Concentration of active ingredient (%) |
| A1 | Acrylic organic polymer | Chen Rong Chen Co | POLYFLOW No.50E | 50 |
| A2 | Acrylic organic polymer | Chen Rong Chen Co | POLYFLOW No.99C | 100 |
| A3 | Acrylic organic polymer | Chen Rong Chen Co | POLYFLOW No.7 | 72 |
| A4 | Acrylic organic polymer | Chen Rong Chen Co | FLOWLEN AC324 | 77 |
| A5 | Acrylic organic polymer | Chen Rong Chen Co | FLOWLEN AC300 | 77 |
| A6 | Acrylic organic polymer | Chen Rong Chen Co | FLOWLEN AC-1190 | 35 |
TABLE 4
Organic solvents
| Leveling level | Species of type | Manufacturer (S) | Mixing ratio |
| B1 | Cyclohexanone/SOLVESSO 150 (trade name) | ExxonMobil, showa chemical industry | 1/1 |
| B2 | Cyclohexanone/SOLVESSO 100 (trade name) | ExxonMobil, showa chemical industry | 1/1 |
| B3 | isophorone/SOLVESSO 150 (trade name) | Daicel chemical industry/ExxonMobii | 1/1 |
| B4 | isophorone/SOLVESSO 100 (trade name) | Daicel chemical industry/ExxonMobil | 1/1 |
| B5 | Cyclohexanone/isophorone/SOLVESSO 150 (trade name) | Zhaorong chemical industry/Daicel chemical industry/ExxonMobil | 1/1/2 |
Blending of the components
TABLE 5
Curing agent
| Leveling level | Species of type | Manufacturer (S) | Model number | Concentration of solid content | Number average molecular weight |
| D1 | Melamine resin | Allnex Japan | CYMEL 303 | 100 | 500 |
| D2 | Melamine resin | Allnex Japan | CYMEL 325 | 80 | 600 |
| D3 | Melamine resin | Allnex Japan | CYMEL370 | 88 | 600 |
| D4 | Blocked isocyanates | Lived Covestro Urethane | Desmodur BL3175 | 75 | 900 |
Blending of the components
TABLE 6
Coloring pigment
| Leveling level | Species of type | Manufacturer (S) | Model number |
| C1 | Titanium oxide | Stone raw product industry | CR-90 |
| C2 | Carbon black | Orion Engineered Carbons | FW200 |
| C3 | Iron oxide | Titan Kogyo | HY-100 |
| C4 | Titanium oxide/carbon black | Stone industry/Orion Engineered Carbons | CR-90/FW200 |
| C5 | Titanium oxide/iron oxide | Stone industry/Titan Kogyo | CR-90/HY-100 |
Blending of the components
[ Table 7-1]
/>
[ Table 7-2]
From the above results, it is understood that the organic solvent-based coating material of the examples of the present disclosure is excellent in curtain film stability and defoaming property even when a resin having a number average molecular weight of less than 10000 is used, and curtain coating can be performed.
The paints 2,4, 12, and 13 of the reference examples are examples using a resin having a number average molecular weight of 10000 or more, and if a resin having a high number average molecular weight is used, both curtain film stability and defoaming property can be achieved. However, since the solid content concentration of the paint is increased by only about 50%, the paint cost is liable to be high as compared with the organic solvent-based paint of the embodiment of the present disclosure.
The disclosure of japanese patent application No. 2021-069925, filed 4/16/2021, is incorporated herein by reference in its entirety.
All documents, patent applications and technical standards described in this specification are incorporated by reference into this specification to the same extent as if each document, patent application and technical standard were specifically and individually described.
Claims (9)
1. An organic solvent-based paint comprising a resin, a surfactant and an organic solvent,
the number average molecular weight of the resin exceeds 1500 and is lower than 10000,
the dynamic surface tension of the organic solvent-based paint measured by the maximum bubble pressure method is 36-50 mN/m in terms of bubble lifetime of 0.05 seconds, 32-45 mN/m in terms of bubble lifetime of 0.5 seconds,
the organic solvent-based paint is used for curtain coating.
2. The organic solvent-based paint according to claim 1, wherein the paint contains a coloring pigment.
3. The organic solvent-based paint according to claim 1 or claim 2, wherein the resin is a resin other than a fluorine-containing resin.
4. The organic solvent-based paint according to any one of claims 1 to 3, wherein the resin is at least 1 selected from the group consisting of a polyester resin, an acrylic resin, and a urethane resin.
5. The organic solvent-based paint according to any one of claims 1 to 4, wherein the solid content concentration of the organic solvent-based paint is 20 to 70% by mass.
6. The organic solvent-based paint according to any one of claims 1 to 5, wherein the organic solvent-based paint further comprises a curing agent comprising at least 1 selected from the group consisting of melamine resins and isocyanates.
7. The organic solvent-based paint according to any one of claims 1 to 6, wherein the concentration of the resin is 5 to 50% by mass relative to the organic solvent-based paint.
8. The organic solvent-based paint according to any one of claims 1 to 7, wherein the concentration of the surfactant is 0.05 to 0.80 mass% relative to the organic solvent-based paint.
9. A method for producing a precoated metal sheet, comprising the steps of:
a step of discharging the organic solvent-based paint according to any one of claims 1 to 8 to form a curtain film having a height of 50 to 500mm, and continuously coating a metal plate with the curtain film to form a coating film; and
and drying and/or curing the coating film to form a precoat layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021-069925 | 2021-04-16 | ||
| JP2021069925 | 2021-04-16 | ||
| PCT/JP2022/017213 WO2022220188A1 (en) | 2021-04-16 | 2022-04-06 | Organic solvent-based coating material and production method for precoated metal sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117157366A true CN117157366A (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202280027832.5A Pending CN117157366A (en) | 2021-04-16 | 2022-04-06 | Organic solvent-based paint and method for producing precoated metal sheet |
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| Country | Link |
|---|---|
| JP (1) | JPWO2022220188A1 (en) |
| KR (1) | KR20230156948A (en) |
| CN (1) | CN117157366A (en) |
| WO (1) | WO2022220188A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3490878B2 (en) | 1997-11-25 | 2004-01-26 | 関西ペイント株式会社 | Paint composition for curtain coating and curtain coating method using this composition |
| WO2004101103A1 (en) * | 2003-05-15 | 2004-11-25 | San Nopco Ltd. | Surfactant and process for producing the same |
| JP4565081B2 (en) * | 2004-08-26 | 2010-10-20 | サンノプコ株式会社 | Surfactant |
| JP4818465B2 (en) * | 2009-05-21 | 2011-11-16 | 新日本製鐵株式会社 | Method for producing multilayer coated metal sheet |
| JP2018100987A (en) * | 2015-04-23 | 2018-06-28 | コニカミノルタ株式会社 | Coating liquid for heat insulation film, manufacturing method of coating liquid for heat insulation film, and infrared shield body |
| JP6953260B2 (en) * | 2017-09-29 | 2021-10-27 | 大日本塗料株式会社 | Paint composition and coating method |
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2022
- 2022-04-06 CN CN202280027832.5A patent/CN117157366A/en active Pending
- 2022-04-06 JP JP2023514627A patent/JPWO2022220188A1/ja active Pending
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| WO2022220188A1 (en) | 2022-10-20 |
| JPWO2022220188A1 (en) | 2022-10-20 |
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