JP3853553B2 - Water-based paint composition - Google Patents
Water-based paint composition Download PDFInfo
- Publication number
- JP3853553B2 JP3853553B2 JP37224899A JP37224899A JP3853553B2 JP 3853553 B2 JP3853553 B2 JP 3853553B2 JP 37224899 A JP37224899 A JP 37224899A JP 37224899 A JP37224899 A JP 37224899A JP 3853553 B2 JP3853553 B2 JP 3853553B2
- Authority
- JP
- Japan
- Prior art keywords
- group
- component
- weight
- water
- meth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 19
- 239000003973 paint Substances 0.000 title description 16
- 239000000203 mixture Substances 0.000 title description 10
- -1 polysiloxane Polymers 0.000 claims description 27
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 17
- 239000008199 coating composition Substances 0.000 claims description 12
- 229920001296 polysiloxane Polymers 0.000 claims description 12
- 125000002947 alkylene group Chemical group 0.000 claims description 11
- 239000000839 emulsion Substances 0.000 claims description 11
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 11
- 239000003960 organic solvent Substances 0.000 claims description 10
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 125000000217 alkyl group Chemical group 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 125000004432 carbon atom Chemical group C* 0.000 claims description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 4
- 125000000843 phenylene group Chemical group C1(=C(C=CC=C1)*)* 0.000 claims description 4
- 239000000178 monomer Substances 0.000 description 19
- 238000000576 coating method Methods 0.000 description 18
- 239000011248 coating agent Substances 0.000 description 17
- 238000003860 storage Methods 0.000 description 17
- 238000000034 method Methods 0.000 description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 8
- 238000011109 contamination Methods 0.000 description 8
- 125000000524 functional group Chemical group 0.000 description 8
- 239000000049 pigment Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 229910000077 silane Inorganic materials 0.000 description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 5
- 229920002554 vinyl polymer Polymers 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 4
- 230000001965 increasing effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000004606 Fillers/Extenders Substances 0.000 description 3
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000007822 coupling agent Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 125000003700 epoxy group Chemical group 0.000 description 3
- 239000003999 initiator Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- UZKWTJUDCOPSNM-UHFFFAOYSA-N 1-ethenoxybutane Chemical compound CCCCOC=C UZKWTJUDCOPSNM-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
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical compound CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-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
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- BAVYZALUXZFZLV-UHFFFAOYSA-N Methylamine Chemical compound NC BAVYZALUXZFZLV-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 150000001735 carboxylic acids Chemical class 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 2
- BYLOHCRAPOSXLY-UHFFFAOYSA-N dichloro(diethyl)silane Chemical compound CC[Si](Cl)(Cl)CC BYLOHCRAPOSXLY-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- XLLIQLLCWZCATF-UHFFFAOYSA-N ethylene glycol monomethyl ether acetate Natural products COCCOC(C)=O XLLIQLLCWZCATF-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000003505 polymerization initiator Substances 0.000 description 2
- 229910052573 porcelain Inorganic materials 0.000 description 2
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- SKYXLDSRLNRAPS-UHFFFAOYSA-N 1,2,4-trifluoro-5-methoxybenzene Chemical compound COC1=CC(F)=C(F)C=C1F SKYXLDSRLNRAPS-UHFFFAOYSA-N 0.000 description 1
- JOLQKTGDSGKSKJ-UHFFFAOYSA-N 1-ethoxypropan-2-ol Chemical compound CCOCC(C)O JOLQKTGDSGKSKJ-UHFFFAOYSA-N 0.000 description 1
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 1
- KJCVRFUGPWSIIH-UHFFFAOYSA-N 1-naphthol Chemical compound C1=CC=C2C(O)=CC=CC2=C1 KJCVRFUGPWSIIH-UHFFFAOYSA-N 0.000 description 1
- IBTLFDCPAJLATQ-UHFFFAOYSA-N 1-prop-2-enoxybutane Chemical compound CCCCOCC=C IBTLFDCPAJLATQ-UHFFFAOYSA-N 0.000 description 1
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 1
- FPZWZCWUIYYYBU-UHFFFAOYSA-N 2-(2-ethoxyethoxy)ethyl acetate Chemical compound CCOCCOCCOC(C)=O FPZWZCWUIYYYBU-UHFFFAOYSA-N 0.000 description 1
- SBASXUCJHJRPEV-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethanol Chemical compound COCCOCCO SBASXUCJHJRPEV-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- XNWFRZJHXBZDAG-UHFFFAOYSA-N 2-METHOXYETHANOL Chemical compound COCCO XNWFRZJHXBZDAG-UHFFFAOYSA-N 0.000 description 1
- WFSMVVDJSNMRAR-UHFFFAOYSA-N 2-[2-(2-ethoxyethoxy)ethoxy]ethanol Chemical compound CCOCCOCCOCCO WFSMVVDJSNMRAR-UHFFFAOYSA-N 0.000 description 1
- 125000000022 2-aminoethyl group Chemical group [H]C([*])([H])C([H])([H])N([H])[H] 0.000 description 1
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 1
- SBYMUDUGTIKLCR-UHFFFAOYSA-N 2-chloroethenylbenzene Chemical compound ClC=CC1=CC=CC=C1 SBYMUDUGTIKLCR-UHFFFAOYSA-N 0.000 description 1
- VUIWJRYTWUGOOF-UHFFFAOYSA-N 2-ethenoxyethanol Chemical compound OCCOC=C VUIWJRYTWUGOOF-UHFFFAOYSA-N 0.000 description 1
- ARMWSTGKHHACOF-UHFFFAOYSA-N 2-ethenoxyethyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)CCOC=C ARMWSTGKHHACOF-UHFFFAOYSA-N 0.000 description 1
- TYZRVQDBDAPABU-UHFFFAOYSA-N 2-ethenoxyethyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCOC=C TYZRVQDBDAPABU-UHFFFAOYSA-N 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 description 1
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
- AGBXYHCHUYARJY-UHFFFAOYSA-N 2-phenylethenesulfonic acid Chemical compound OS(=O)(=O)C=CC1=CC=CC=C1 AGBXYHCHUYARJY-UHFFFAOYSA-N 0.000 description 1
- GCYHRYNSUGLLMA-UHFFFAOYSA-N 2-prop-2-enoxyethanol Chemical compound OCCOCC=C GCYHRYNSUGLLMA-UHFFFAOYSA-N 0.000 description 1
- HCGFUIQPSOCUHI-UHFFFAOYSA-N 2-propan-2-yloxyethanol Chemical compound CC(C)OCCO HCGFUIQPSOCUHI-UHFFFAOYSA-N 0.000 description 1
- YEYKMVJDLWJFOA-UHFFFAOYSA-N 2-propoxyethanol Chemical compound CCCOCCO YEYKMVJDLWJFOA-UHFFFAOYSA-N 0.000 description 1
- QCAHUFWKIQLBNB-UHFFFAOYSA-N 3-(3-methoxypropoxy)propan-1-ol Chemical compound COCCCOCCCO QCAHUFWKIQLBNB-UHFFFAOYSA-N 0.000 description 1
- MCDBEBOBROAQSH-UHFFFAOYSA-N 3-[dimethoxy(methyl)silyl]propyl prop-2-enoate Chemical compound CO[Si](C)(OC)CCCOC(=O)C=C MCDBEBOBROAQSH-UHFFFAOYSA-N 0.000 description 1
- OJXVWULQHYTXRF-UHFFFAOYSA-N 3-ethenoxypropan-1-ol Chemical compound OCCCOC=C OJXVWULQHYTXRF-UHFFFAOYSA-N 0.000 description 1
- VLDQEHUZQHHLHD-UHFFFAOYSA-N 3-ethenoxypropyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)CCCOC=C VLDQEHUZQHHLHD-UHFFFAOYSA-N 0.000 description 1
- JMICBDHJGYAFMU-UHFFFAOYSA-N 3-ethenoxypropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCOC=C JMICBDHJGYAFMU-UHFFFAOYSA-N 0.000 description 1
- GRSRGFYFIPVZDJ-UHFFFAOYSA-N 3-ethenoxypropylsilane Chemical compound C(=C)OCCC[SiH3] GRSRGFYFIPVZDJ-UHFFFAOYSA-N 0.000 description 1
- OJPSFJLSZZTSDF-UHFFFAOYSA-N 3-ethoxyprop-1-ene Chemical compound CCOCC=C OJPSFJLSZZTSDF-UHFFFAOYSA-N 0.000 description 1
- OFNISBHGPNMTMS-UHFFFAOYSA-N 3-methylideneoxolane-2,5-dione Chemical compound C=C1CC(=O)OC1=O OFNISBHGPNMTMS-UHFFFAOYSA-N 0.000 description 1
- XDQWJFXZTAWJST-UHFFFAOYSA-N 3-triethoxysilylpropyl prop-2-enoate Chemical compound CCO[Si](OCC)(OCC)CCCOC(=O)C=C XDQWJFXZTAWJST-UHFFFAOYSA-N 0.000 description 1
- KBQVDAIIQCXKPI-UHFFFAOYSA-N 3-trimethoxysilylpropyl prop-2-enoate Chemical compound CO[Si](OC)(OC)CCCOC(=O)C=C KBQVDAIIQCXKPI-UHFFFAOYSA-N 0.000 description 1
- MKTOIPPVFPJEQO-UHFFFAOYSA-N 4-(3-carboxypropanoylperoxy)-4-oxobutanoic acid Chemical compound OC(=O)CCC(=O)OOC(=O)CCC(O)=O MKTOIPPVFPJEQO-UHFFFAOYSA-N 0.000 description 1
- YCIGYTFKOXGYTA-UHFFFAOYSA-N 4-(3-cyanopropyldiazenyl)butanenitrile Chemical compound N#CCCCN=NCCCC#N YCIGYTFKOXGYTA-UHFFFAOYSA-N 0.000 description 1
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical group C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- USFZMSVCRYTOJT-UHFFFAOYSA-N Ammonium acetate Chemical compound N.CC(O)=O USFZMSVCRYTOJT-UHFFFAOYSA-N 0.000 description 1
- 239000005695 Ammonium acetate Substances 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000005046 Chlorosilane Substances 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- 125000000174 L-prolyl group Chemical group [H]N1C([H])([H])C([H])([H])C([H])([H])[C@@]1([H])C(*)=O 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
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- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 241000233855 Orchidaceae Species 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 description 1
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 description 1
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- UWHCKJMYHZGTIT-UHFFFAOYSA-N Tetraethylene glycol, Natural products OCCOCCOCCOCCO UWHCKJMYHZGTIT-UHFFFAOYSA-N 0.000 description 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- RQVFGTYFBUVGOP-UHFFFAOYSA-N [acetyloxy(dimethyl)silyl] acetate Chemical compound CC(=O)O[Si](C)(C)OC(C)=O RQVFGTYFBUVGOP-UHFFFAOYSA-N 0.000 description 1
- CNOSLBKTVBFPBB-UHFFFAOYSA-N [acetyloxy(diphenyl)silyl] acetate Chemical compound C=1C=CC=CC=1[Si](OC(C)=O)(OC(=O)C)C1=CC=CC=C1 CNOSLBKTVBFPBB-UHFFFAOYSA-N 0.000 description 1
- TVJPBVNWVPUZBM-UHFFFAOYSA-N [diacetyloxy(methyl)silyl] acetate Chemical compound CC(=O)O[Si](C)(OC(C)=O)OC(C)=O TVJPBVNWVPUZBM-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- LLJZKKVYXXDWTB-UHFFFAOYSA-N acetic acid;sodium Chemical compound [Na].[Na].CC(O)=O LLJZKKVYXXDWTB-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
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- 238000004383 yellowing Methods 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
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Description
【0001】
【発明の属する技術分野】
本発明は、金属、ガラス、磁器タイル、コンクリート、サイディングボード、押出成型板、プラスチック等の各種素材の表面仕上げに使用することができ、主に建築物、土木構造物等の躯体保護に使用する水性塗料組成物に関するものである。
【0002】
【従来技術】
近年、建築・土木構造物に使用する塗料分野においては有機溶剤を溶媒とする溶剤型塗料から、水を溶媒とする水性塗料への転換が図られつつある。これは、塗装作業者や居住者の健康被害を低減するためや、大気環境汚染を低減する目的で行われているものであり、年々水性化が進んできている。
【0003】
しかしながら、水性塗料によって形成された塗膜は、一般的に溶剤型の塗料による塗膜に比べて硬度が低く、汚染物質が染み込みやすい傾向にあり、一度汚染物質が付着すると、塗膜表面からその汚れを除去することは困難な場合が多い。特に、都心や都市近郊部においては、自動車等からの排出ガスにより、大気中に油性の汚染物質が浮遊している状況であり、これら汚染物質による塗膜汚染は、美観を大きく損ねてしまう大きな要因となっている。
【0004】
水性塗料の耐汚染性を改善する手法としては、一般的に、樹脂のガラス転移温度(以下「Tg」という)を上げる方法がある。この方法ではスチレン、メチルメタクリレート等Tgの高いモノマーを導入する必要があるが、単にこのようなモノマーの比率を上げるだけでは、十分な耐汚染性改善の効果は得られず、また耐候性の低下を招くこともあり、好ましくない。
【0005】
他の方法としては、シリコン成分の導入による架橋性の付与があげられる。この方法は、合成樹脂エマルション中に反応性シリル基含有化合物を導入し、該官能基どうしを反応させることによって、塗膜の硬度を高めようとするものである。この方法では、シリコン成分の比率を上げることによって塗膜の硬度が高まり、耐汚染性を発現することができる。しかし、シリコン成分の増量に伴い、残存する反応性シリル基どうしが造膜後に反応し、塗膜の内部応力が急速に上がることによって、塗膜に割れを生じやすくなるという問題が発生する。
【0006】
一方、合成樹脂エマルションを用いた塗料では、十分な造膜性を確保するため、通常、各種の有機溶剤を混合する。これら有機溶剤は合成樹脂エマルションを可塑化し、エマルション粒子どうしの融着性を高める機能を有するものである。しかしながら、反応性シリル基含有を有する合成樹脂エマルションに通常の有機溶剤を使用すると、その可塑化機能により反応性シリル基どうしが作用しやすくなるため、貯蔵安定性が低下してしまい、実用的な塗料を得ることができないという問題が生じる。
【0007】
【発明が解決しようとする課題】
本発明は上記のような問題点に鑑みなされたもので、耐汚染性に優れるとともに、経時的に割れを生じることのない塗膜を形成することができ、さらには貯蔵安定性に優れる水性塗料組成物を得ることである。
【0008】
【課題を解決するための手段】
これらの課題を解決するため、本発明者は鋭意検討を行い、その結果、反応性シリル基を有する合成樹脂エマルションと、特定の側鎖を有するポリシロキサン化合物とを組み合わせることが有効であることを見出し、本発明の完成に至った。
【0009】
即ち、本発明は、下記の水性塗料組成物を提供するものである。
1.(A)反応性シリル基を有する合成樹脂エマルション、(B)ポリシロキサンからなる主鎖に、片末端が−OH基であるポリオキシアルキレン鎖を側鎖及び/または末端に有し、下記式に示す構造の何れか一方または両方を有するものであり、水酸基価が5〜150KOHmg/gであるポリシロキサン化合物
【化3】
【化4】
(R 1 、R 2 はアルキル基またはフェニル基、R 3 はアルキレン基またはフェニレン基、R 4 は炭素数1〜4のアルキレン基で、炭素数は同一でも異なってもよい。nは1以上の整数。)、を主成分とし、(A)の固形分100重量部に対し、(B)を0.1〜8.0重量部含有することを特徴とする水性塗料組成物。
2.さらに、(C)水に対する溶解度20wt%以上の有機溶剤を3〜50重量部含有する1.記載の水性塗料組成物。
【0010】
【発明の実施の形態】
以下、本発明をその実施の形態とともに詳細に説明する。
【0011】
本発明の水性塗料組成物は、(A)反応性シリル基を有する合成樹脂エマルション(以下、「(A)成分」という)、(B)ポリシロキサンからなる主鎖に、片末端が−OH基であるポリオキシアルキレン鎖を側鎖及び/または末端に有し、下記式に示す構造の何れか一方または両方を有するものであり、水酸基価が5〜150KOHmg/gであるポリシロキサン化合物
【化5】
【化6】
(R 1 、R 2 はアルキル基またはフェニル基、R 3 はアルキレン基またはフェニレン基、R 4 は炭素数1〜4のアルキレン基で、炭素数は同一でも異なってもよい。nは1以上の整数。)(以下、「(B)成分」という)、を主成分とするものである。
【0012】
本発明組成物における(A)成分は、耐候性、耐汚染性、耐黄変性、耐水性、耐薬品性等が良好な合成樹脂エマルションであり、(a)反応性シリル基含有化合物(以下「a成分」という)を必須成分として得られるものである。
【0013】
(A)成分において、a成分を導入する方法としては、特に限定されず各種の方法を採用することができるが、例えば、
▲1▼反応性シリル基含有ビニル系単量体を共重合する方法
▲2▼反応性シリル基含有ビニル系単量体を共重合した後に、シラン化合物を反応させる方法、
▲3▼樹脂中の官能基と、該官能基と反応可能な官能基を有するカップリング剤を反応させる方法、
▲4▼樹脂中の官能基と、該官能基と反応可能な官能基を有するカップリング剤を反応させた後に、シラン化合物を反応させる方法、
等があげられる。
【0014】
反応性シリル基としては、珪素原子にアルコキシル基、フェノキシ基、メルカプト基、アミノ基、ハロゲン等が結合したものである。
【0015】
▲1▼、▲2▼における反応性シリル基含有ビニル系単量体としては、反応性シリル基と重合性二重結合を含有する化合物であり、例えば、ビニルトリメトキシシラン、ビニルトリエトキシシラン、ビニルトリ−n−ブトキシシラン、ビニルトリス(β−メトキシエトキシ)シラン、アリルトリメトキシシラン、トリメトキシシリルエチルビニルエーテル、トリエトキシシリルエチルビニルエーテル、トリメトキシシリルプロピルビニルエーテル、トリエトキシシリルプロピルビニルエーテル、γ−(メタ)アクリロイルオキシプロピルトリメトキシシラン、γ−(メタ)アクリロイルオキシプロピルトリエトキシシラン、γ−(メタ)アクリロイルオキシプロピルメチルジメトキシシラン、ビニルメチルジメトキシシラン、メチルジメトキシシリルエチルビニルエーテル、メチルジメトキシシリルプロピルビニルエーテル等があげられ、これらの1種または2種以上を使用することができる。
【0016】
▲2▼、▲4▼におけるシラン化合物としては、反応性シリル基を一分子中に2個以上有するものが用いられ、例えば、テトラエトキシシラン、テトラメトキシシラン、テトラブトキシシラン等の4官能アルコキシシラン類;メチルトリメトキシシラン、メチルトリエトキシシラン、メチルトリブトキシシラン、エチルトリメトキシシラン、エチルトリエトキシシラン、エチルトリブトキシシラン、プロピルトリメトキシシラン、プロピルトリエトキシシラン、ブチルトリメトキシシラン、ブチルトリエトキシシラン、フェニルトリメトキシシラン、フェニルトリエトキシシラン、フェニルトリブトキシシラン等の3官能アルコキシシラン類;ジメチルジメトキシシラン、ジメチルジエトキシシラン、ジメチルジブトキシシラン、ジエチルジメトキシシラン、ジエチルジエトキシシラン、ジプロピルジメトキシシラン、ジプロピルジエトキシシラン、ジブチルジメトキシシラン、ジブチルジエトキシシラン、ジフェニルジメトキシシラン、ジフェニルジエトキシシラン、ジフェニルジブトキシシラン、メチルフェニルジメトキシシラン、メチルフェニルジエトキシシラン等の2官能アルコキシシラン類;テトラクロロシラン、メチルトリクロロシラン、エチルトリクロロシラン、プロピルトリクロロシラン、フェニルトリクロロシラン、ビニルトリクロロシラン、ジメチルジクロロシラン、ジエチルジクロロシラン、ジフェニルジクロロシラン、メチルフェニルジクロロシラン等のクロロシラン類;テトラアセトキシシラン、メチルトリアセトキシシラン、フェニルトリアセトキシシラン、ジメチルジアセトキシシラン、ジフェニルジアセトキシシラン等のアセトキシシラン類などがあげられ、これらの1種または2種以上を使用することができる。また、反応性シリル基を一分子中に1個有する化合物を併用することもできる。
【0017】
▲3▼、▲4▼における官能基の組み合わせとしては、水酸基とイソシアネート基、アミノ基とイソシアネート基、カルボキシル基とエポキシ基、アミノ基とエポキシ基、アルコキシシリル基どうし等があげられる。カップリング剤は、例えば、一分子中に、少なくとも1個以上の反応性シリル基とそのほかの置換基を有する化合物であり、具体的には、β−(3、4エポキシシクロヘキシル)エチルトリメトキシシラン、γ−グリシドキシプロピルメチルジエトキシシラン、γ−グリシドキシプロピルトリエトキシシラン、N−(β−アミノエチル)−γ−アミノプロピルメチルジメトキシシラン、N−(β−アミノエチル)−γ−アミノプロピルトリメトキシシラン、γ−アミノプロピルトリメトキシシラン、γ−アミノプロピルトリエトキシシラン、イソシアネート官能性シランなどがあげられ、これらの1種または2種以上を使用することができる。
【0018】
(A)成分におけるa成分の重量比率は、通常、(A)成分の樹脂固形分中にSiO2換算で0.1〜70重量%であるが、本発明では特に、0.3〜30重量%である場合に有効である。
【0019】
なお、SiO2換算とは、Si−O結合をもつ化合物を、完全に加水分解した後に、900℃で焼成した際にシリカ(SiO2)となって残る重量分にて表したものである。
一般に、アルコキシシランやシリケート等は、水と反応して加水分解反応が起こりシラノールとなり、さらにシラノールどうしやシラノールとアルコキシにより縮合反応を起こす性質を持っている。この反応を究極まで行うと、シリカ(SiO2)となる。これらの反応は一般式、
RO(Si(OR)2O)nR+(n+1)H2O→nSiO2+(2n+2)ROH
という反応式で表されるが、この反応式をもとに残るシリカ成分の量を換算したものである。
【0020】
(A)成分の共重合モノマーとしては、特に限定されないが、アクリル系モノマーを好適に用いることができる。アクリル系モノマーとしては、、例えば、メチル(メタ)アクリレート、エチル(メタ)アクリレート、n−ブチル(メタ)アクリレート、i−ブチル(メタ)アクリレート、2−エチルヘキシル(メタ)アクリレート、シクロヘキシル(メタ)アクリレートなどのアルキル基含有(メタ)アクリル系単量体;2−ヒドロキシエチル(メタ)アクリレートなどの水酸基含有(メタ)アクリル系単量体;(メタ)アクリル酸などのエチレン性不飽和カルボン酸;ジメチルアミノエチル(メタ)アクリレート、ジメチルアミノプロピル(メタ)アクリレートなどのアミノ基含有(メタ)アクリル系単量体;(メタ)アクリルアミド、エチル(メタ)アクリルアミドなどのアミド含有(メタ)アクリル系単量体;アクリロニトリルなどのニトリル基含有(メタ)アクリル系単量体;グリシジル(メタ)アクリレートなどのエポキシ基含有(メタ)アクリル系単量体等があげられる。
【0021】
(A)成分においては、前記モノマーの他に、スチレン、メチルスチレン、クロロスチレン、ビニルトルエンなどの芳香族炭化水素系ビニル単量体;マレイン酸、イタコン酸、クロトン酸、フマル酸、シトラコン酸などのα,β−エチレン性不飽和カルボン酸;スチレンスルホン酸、ビニルスルホン酸などのスルホン酸含有ビニル単量体;無水マレイン酸、無水イタコン酸などの酸無水物;塩化ビニル、塩化ビニリデン、クロロプレンなどの塩素含有単量体;ヒドロキシエチルビニルエーテル、ヒドロキシプロピルビニルエーテルなどの水酸基含有アルキルビニルエーテル;エチレングリコールモノアリルエーテル、プロピレングリコールモノアリルエーテルジエチレングリコールモノアリルエーテルなどのアルキレングリコールモノアリルエーテル;エチレン、プロピレン、イソブチレンなどのα−オレフィン;酢酸ビニル、プロピオン酸ビニル、酪酸ビニル、ピバリン酸ビニルなどのビニルエステル;メチルビニルエーテル、エチルビニルエーテル、ブチルビニルエーテル、シクロヘキシルビニルエーテルなどのビニルエーテル;エチルアリルエーテル、ブチルアリルエーテルなどのアリルエーテル等を用いることもできる。この他、エチレン性不飽和二重結合含有紫外線吸収剤、エチレン性不飽和二重結合含有光安定剤等を用いることもできる。
【0022】
重合に用いる乳化剤としては、アニオン性、カチオン性、ノニオン性、両性、ノニオン−カチオン性、ノニオン−アニオン性のもの、あるいは非反応性のもの、反応性を有するものから適宜選択し、単独あるいは併用して使用する。このうち、ポリオキシアルキレン鎖と不飽和二重結合とを有する反応性乳化剤の使用は、割れ防止性、貯蔵安定性、さらには耐水性を向上させることができ、好ましいものである。
【0023】
重合開始剤としては、通常のラジカル開始剤を使用することができ、過硫酸アンモニウム塩などの過硫酸塩、過酸化水素と亜硫酸水素ナトリウムなどとの組み合わせからなるレドックス開始剤、さらに第一鉄塩、硝酸銀などの無機系開始剤を混合させた系、または、ジコハク酸パーオキシド、ジグルタール酸パーオキシドなどの二塩基酸過酸化物、アゾビスブチロニトリルなどの有機系開始剤などが挙げられる。重合開始剤の使用量は、通常、単量体100重量部に対して0.01〜5重量部程度である。
【0024】
(A)成分の重量平均分子量は30000以上、さらには50000以上であることが望ましい。分子量が30000以上であることにより、耐候性、耐汚染性、耐水性等を向上させることができる。また、(A)成分の最低造膜温度は0〜80℃であることが望ましい。最低造膜温度が0℃より低い場合は耐汚染性が低下する傾向となり、80℃より高い場合は塗膜に割れが生じやすくなる。
【0025】
(B)成分は、本発明組成物の形成塗膜に耐汚染性、割れ防止性を付与する成分であり、さらには塗料の貯蔵安定性を向上させる機能も有する。
【0026】
(B)成分は、ポリシロキサンからなる主鎖に、片末端が−OH基であるポリオキシアルキレン鎖を側鎖及び/または末端に有する化合物であり、下記式に示す構造の何れか一方または両方を有するものである。
【0027】
【化7】
【0028】
【化8】
【0029】
(R1、R2はアルキル基またはフェニル基、R3はアルキレン基またはフェニレン基、R4は炭素数1〜4のアルキレン基で、炭素数は同一でも異なってもよい。nは1以上の整数。)
【0030】
(B)成分は、例えば、アリル化ポリエーテル化合物とメチルハイドロジェンシリコーンオイルのヒドロシリル化反応により製造することができる。
【0031】
(B)成分の水酸基価は、5〜150KOHmg/gであり、さらには10〜100KOHmg/g、より好ましくは40〜80KOHmg/gである。水酸基価が5KOHmg/gより小さい場合は、経時的に耐汚染性が低下し、また十分な貯蔵安定性が確保できない傾向となる。150KOHmg/gより大きい場合は、割れが発生しやすく、また貯蔵安定性が低下する傾向となる。
【0032】
アルキレンオキサイドとしては、メチレンオキサイド、エチレンオキサイド、プロピレンオキサイド、ブチレンオキサイド等があげられ、このうちエチレンオキサイド及び/またはプロピレンオキサイドが好ましく使用される。
【0033】
(B)成分の数平均分子量は1000〜50000であることが望ましい。このうち、アルキレンオキサイド鎖の数平均分子量は40〜30000であることが望ましい。アルキレンオキサイド鎖の数平均分子量が40より小さい場合は、耐汚染性、割れ防止性、貯蔵安定性において十分な物性が得られない。逆に30000より大きい場合は、耐水性、耐汚染性、耐候性が低下してしまう。
【0034】
(B)成分の含有量は、(A)成分の固形分100重量部に対し、0.1〜8.0重量部である。(B)成分の含有量が0.1重量部より小さい場合は、耐汚染性、割れ防止性、貯蔵安定性において十分な物性が得られない。8.0重量部より大きい場合は、耐水性、耐候性、割れ防止性、リコート性、貯蔵安定性が低下してしまう。
【0035】
本発明では、特定の水酸基価を有する(B)成分を特定量含有するため、(B)成分の末端−OH基が(A)成分の反応性シリル基と適度に相互作用し、該反応性シリル基どうしの急速な反応を抑制するものと推測される。その結果、塗膜の割れ発生を防止することができる。また、塗料貯蔵中においても、(A)成分のシリル基どうしの反応による粘度変動を、(B)成分の立体障害効果により抑制することができる。さらに、本発明では、(B)成分のポリオキシアルキレン鎖によって塗膜表面が親水化され、耐汚染性を付与することもできる。
【0036】
本発明においては、(C)水に対する溶解度20wt%以上の有機溶剤(以下「(C)成分」という)を含有することが望ましい。このような(C)成分を含有することにより、低温ないしは常温における造膜性を確保するとともに、塗料の貯蔵安定を向上させることができる。
【0037】
(C)成分としては、例えば、エチレングリコールモノメチルエーテル、エチレングリコールモノエチルエーテル、エチレングリコールモノプロピルエーテル、エチレングリコールイソプロピルエーテル、エチレングリコールモノブチルエーテル、エチレングリコールモノメチルエーテルアセテート、エチレングリコールモノエチルエーテルアセテート、ジエチレングリコールモノメチルエーテル、ジエチレングリコールモノエチルエーテル、ジエチレングリコールモノエチルエーテルアセテート、トリエチレングリコール、トリエチレングリコールモノメチルエーテル、トリエチレングリコールモノエチルエーテル、テトラエチレングリコール、プロピレングリコールモノメチルエーテル、プロピレングリコールモノエチルエーテル、プロピレングリコールモノプロピルエーテル、ジプロピレングリコールモノメチルエーテル、1−3ブタンジオール、1−5ペンタンジオール、ジアセトンアルコール、Nメチルピロリドン等があげられ、これらの1種または2種以上を使用することができる。
【0038】
(C)成分の含有量は、(A)成分の固形分100重量部に対し、3〜50重量部である。(C)成分の含有量が3重量部より小さい場合は、貯蔵安定性において十分な物性を確保し難く、また造膜時に割れを生じやすくなる。50重量部より大きい場合は、貯蔵安定性が低下する傾向となる。なお、有機溶剤としては、本発明の効果を阻害しない限り、(C)成分以外の有機溶剤を併用することもできる。
【0039】
本発明組成物のpHは5〜10、さらには6〜8であることが望ましい。pHがこのような範囲内に調整されることにより、十分な貯蔵安定性、塗膜物性を確保することができる。pH調整のために用いられる化合物としては、塩酸、リン酸、硝酸、硫酸等の無機酸類;蟻酸、酢酸等有機酸類;水酸化ナトリウム、水酸化カリウム、炭酸ナトリウム、炭酸アンモニウム、アンモニア、酢酸ナトリウム、酢酸アンモニウム、ケイ酸ナトリウム、リン酸ナトリウム等の無機塩基類;メチルアミン、ジメチルアミン、トリエチルアミン、トリエタノールアミンなどの有機塩基類等があげられ、これらの1種または2種以上を使用することができる。
【0040】
本発明組成物には、上述の成分の他に、必要に応じて通常塗料に用いられる無機系着色顔料、有機系着色顔料、体質顔料などを配合することができる。また、本発明に影響しない程度の可塑剤、防腐剤、防黴剤、消泡剤、増粘剤、レベリング剤、顔料分散剤、沈降防止剤、たれ防止剤、艶消し剤、紫外線吸収剤、酸化防止剤などの添加剤を単独あるいは併用して配合することもできる。
【0041】
無機系着色顔料としては、例えば、酸化チタン、カーボンブラック、酸化第二鉄(ベンガラ)、黄色酸化鉄、オーカー、群青、コバルトグリーン等、有機系着色顔料としては、例えば、アゾ系、ナフトール系、ピラゾロン系、アントラキノン系、ペリレン系、キナクリドン系、ジスアゾ系、イソインドリノン系、ベンゾイミダゾール系、フタロシアニン系、キノフタロン系等が使用できる。体質顔料としては、例えば、重質炭酸カルシウム、クレー、カオリン、タルク、沈降性硫酸バリウム、炭酸バリウム等の体質顔料をあげることができる。
【0042】
本発明組成物は、金属、ガラス、磁器タイル、コンクリート、サイディングボード、押出成形板、プラスチック等の各種素材の表面仕上げに使用することができ、主に建築物、土木構築物等の躯体の保護に使用するものである。この際、本発明の水性塗料組成物は、最終の仕上面に施されているものであり、基材に直接塗装することもできるし、何らかの表面処理(シーラー、サーフェーサー、フィラー等による下地処理等)を施した上に塗装することも可能であるが、特に限定されるものではない。塗装方法としては、ハケ塗り、スプレー塗装、ローラー塗装、ロールコーター、フローコーター等種々の方法により塗装することができる。さらには、建材表面に工場等においてプレコートすることも可能である。
【0043】
【実施例】
以下に実施例及び比較例を示し、本発明の特徴をより明確にする。
【0044】
[塗料の作製]
表1、2に示すような原料を使用して、表3に示す配合にて塗料を作製し、各試験を行った。
【0045】
【表1】
【0046】
【表2】
【0047】
【表3】
【0048】
[試験方法]
▲1▼貯蔵安定性
作製した塗料組成物を50℃の恒温槽に30日間貯蔵後、粘度変化を確認した。評価は以下の通り。
◎:粘度変化10%未満
○:粘度変化10%以上〜30%未満
△:粘度変化30%以上〜50%未満
×:粘度変化50%以上
【0049】
▲2▼耐湿潤冷熱繰り返し性
150×70×3mmのフレキシブル板に、SKクリヤーシーラー(アクリル樹脂エマルション系下塗材;エスケー化研株式会社製)を乾燥膜厚30μmとなるようにスプレー塗装し、標準状態で8時間乾燥を行った後、作製した塗料組成物を乾燥膜厚が40μmとなるようにスプレー塗装し試験体を作製した。作製した試験体をJIS K5660 4.13(1995)に準じ、20±2℃の水中に18時間浸した後、直ちに−20±3℃に保った恒温槽に3時間冷却し、次に50±3℃に保った別の恒温槽で3時間加温した。この操作を10回繰り返した後、標準状態に約1時間置いて、塗膜表面の状態を目視にて観察した。この際にクラックや剥がれを全く生じなかったものを○、微小なクラックの発生したものを△、明確にクラック、剥がれを生じたものを×として評価した。
【0050】
▲3▼促進汚染試験1
150×75×0.8mmのアルミ板に、SK#1000プライマー(エポキシ樹脂系下塗材;エスケー化研株式会社製)を乾燥膜厚30μmとなるようにスプレー塗装し、標準状態で8時間乾燥を行った後、作製した塗料組成物を乾燥膜厚が40μmとなるようにスプレー塗装し試験体を作製した。
作製した試験体を、標準状態で7日間乾燥養生した後、塗膜面に15重量%カーボンブラック水分散ペースト液を、直径20mm、高さ5mmとなるように滴下し、50℃の恒温室中に2時間放置した。その後流水中にて洗浄し、塗膜表面の汚染の程度を目視にて評価した。評価は以下の通り。
◎:痕跡が認められない
○:わずかな痕跡のみ認められる
△:痕跡が認められる
×:著しい痕跡が認められる
【0051】
▲4▼促進汚染試験2
上記促進汚染試験1と同様にして試験体を作製し、これら試験体を室温にて0.1重量%カーボンブラック水分散液に2時間浸漬した。室温2時間乾燥後、塗膜表面の汚染の程度を明度差(ΔL)にて評価した。明度差の測定には東京電色(株)社製TC−1800型色差計を用いた。
【0052】
[試験結果]
【表4】
【0053】
試験結果を表4に示す。本発明組成物である実施例1〜6では、いずれの試験においても良好な結果であった。特に、ポリシロキサン化合物の水酸基価が最も好ましい範囲内であり、かつ、水に対する溶解度の高い有機溶剤を含有する実施例2〜4は貯蔵安定性、耐汚染性において、一段と優れた結果を得た。一方、ポリシロキサン化合物の水酸基価が本発明の範囲外である比較例1、2、ポリシロキサン化合物の含有量が本発明の範囲外である比較例3、4、ポリシロキサン化合物を含まない比較例5では、いずれも十分な結果を得ることができなかった。
【0054】
【発明の効果】
本発明によれば、耐汚染性に優れるとともに、経時的に割れを生じることのない塗膜を形成することができ、さらには貯蔵安定性に優れる水性塗料組成物を得ることができる。また、本発明組成物は1液型であるため、塗装作業上の煩雑さを軽減することができる材料である。[0001]
BACKGROUND OF THE INVENTION
The present invention can be used for surface finishing of various materials such as metal, glass, porcelain tiles, concrete, siding boards, extrusion boards, plastics, etc., and is mainly used for protection of building structures such as buildings and civil engineering structures. The present invention relates to an aqueous coating composition.
[0002]
[Prior art]
In recent years, in the field of paints used for construction and civil engineering structures, a shift from solvent-based paints using organic solvents to water-based paints using water as a solvent is being attempted. This is carried out for the purpose of reducing the health hazards of painters and residents, and for the purpose of reducing air pollution.
[0003]
However, a coating film formed with a water-based paint generally has a lower hardness than a solvent-type paint film and tends to soak up contaminants. It is often difficult to remove dirt. In particular, in urban areas and suburban areas, oily pollutants are floating in the atmosphere due to exhaust gases from automobiles, etc., and contamination of the coating film with these pollutants greatly damages the beauty. It is a factor.
[0004]
As a technique for improving the stain resistance of a water-based paint, there is generally a method of increasing the glass transition temperature (hereinafter referred to as “Tg”) of a resin. In this method, it is necessary to introduce a monomer having a high Tg such as styrene, methyl methacrylate, etc. However, simply increasing the ratio of such a monomer does not provide a sufficient effect of improving the stain resistance, and also reduces the weather resistance. This is not preferable.
[0005]
Other methods include imparting crosslinkability by introducing a silicon component. This method is intended to increase the hardness of the coating film by introducing a reactive silyl group-containing compound into a synthetic resin emulsion and reacting the functional groups. In this method, by increasing the ratio of the silicon component, the hardness of the coating film is increased and stain resistance can be exhibited. However, as the amount of silicon component increases, the remaining reactive silyl groups react with each other after film formation, and the internal stress of the coating film rapidly increases, thereby causing a problem that the coating film is likely to be cracked.
[0006]
On the other hand, in a paint using a synthetic resin emulsion, various organic solvents are usually mixed in order to ensure sufficient film forming properties. These organic solvents have a function of plasticizing the synthetic resin emulsion and enhancing the fusing property between the emulsion particles. However, when a normal organic solvent is used in the synthetic resin emulsion having a reactive silyl group content, the reactive silyl groups are likely to act due to the plasticizing function, so that the storage stability is lowered and practical. The problem arises that the paint cannot be obtained.
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above problems, and is a water-based paint that is excellent in stain resistance, can form a coating film that does not crack with time, and is excellent in storage stability. It is to obtain a composition.
[0008]
[Means for Solving the Problems]
In order to solve these problems, the present inventor has intensively studied, and as a result, it is effective to combine a synthetic resin emulsion having a reactive silyl group and a polysiloxane compound having a specific side chain. The headline, the present invention has been completed.
[0009]
That is, the present invention provides the following aqueous coating composition.
1. (A) Synthetic resin emulsion having a reactive silyl group, (B) A main chain composed of polysiloxane has a polyoxyalkylene chain having a —OH group at one end as a side chain and / or a terminal, A polysiloxane compound having one or both of the structures shown in the formula and having a hydroxyl value of 5 to 150 KOHmg / g
[Formula 4]
(R 1 and R 2 are alkyl groups or phenyl groups, R 3 is an alkylene group or phenylene group, R 4 is an alkylene group having 1 to 4 carbon atoms, and the carbon numbers may be the same or different. N is 1 or more. integer.), was used as a main component, (relative to 100 parts by weight of a solid content of a), an aqueous coating composition characterized in that it contains 0.1 to 8.0 parts by weight of (B).
2. (C) The aqueous coating composition according to 1., further comprising 3 to 50 parts by weight of an organic solvent having a solubility in water of 20 wt% or more.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail together with embodiments thereof.
[0011]
The aqueous coating composition of the present invention comprises (A) a synthetic resin emulsion having a reactive silyl group (hereinafter referred to as “component (A)”), (B) a main chain composed of polysiloxane, and one terminal is —OH group. A polysiloxane compound having a polyoxyalkylene chain at a side chain and / or a terminal, and having either one or both of the structures shown in the following formula and having a hydroxyl value of 5 to 150 KOHmg / g ]
[Chemical 6]
(R 1 and R 2 are alkyl groups or phenyl groups, R 3 is an alkylene group or phenylene group, R 4 is an alkylene group having 1 to 4 carbon atoms, and the carbon numbers may be the same or different. N is 1 or more. An integer.) (Hereinafter referred to as “component (B)”).
[0012]
The component (A) in the composition of the present invention is a synthetic resin emulsion having favorable weather resistance, stain resistance, yellowing resistance, water resistance, chemical resistance, etc., and (a) a reactive silyl group-containing compound (hereinafter “ a) ”) as an essential component.
[0013]
In the component (A), the method of introducing the component a is not particularly limited, and various methods can be adopted.
(1) A method of copolymerizing a reactive silyl group-containing vinyl monomer (2) A method of reacting a silane compound after copolymerizing a reactive silyl group-containing vinyl monomer,
(3) A method of reacting a functional group in the resin with a coupling agent having a functional group capable of reacting with the functional group,
(4) A method of reacting a silane compound after reacting a functional group in the resin with a coupling agent having a functional group capable of reacting with the functional group,
Etc.
[0014]
The reactive silyl group is a group in which an alkoxyl group, phenoxy group, mercapto group, amino group, halogen or the like is bonded to a silicon atom.
[0015]
The reactive silyl group-containing vinyl monomer in (1) and (2) is a compound containing a reactive silyl group and a polymerizable double bond, such as vinyltrimethoxysilane, vinyltriethoxysilane, Vinyltri-n-butoxysilane, vinyltris (β-methoxyethoxy) silane, allyltrimethoxysilane, trimethoxysilylethyl vinyl ether, triethoxysilylethyl vinyl ether, trimethoxysilylpropyl vinyl ether, triethoxysilylpropyl vinyl ether, γ- (meth) Acryloyloxypropyltrimethoxysilane, γ- (meth) acryloyloxypropyltriethoxysilane, γ- (meth) acryloyloxypropylmethyldimethoxysilane, vinylmethyldimethoxysilane, methyldimethoxy Lil ethyl vinyl ether, and methyl dimethoxy silyl propyl vinyl ether and the like, can be used one or two or more thereof.
[0016]
As the silane compounds in (2) and (4), those having two or more reactive silyl groups in one molecule are used. For example, tetrafunctional alkoxysilanes such as tetraethoxysilane, tetramethoxysilane, and tetrabutoxysilane. Class: methyltrimethoxysilane, methyltriethoxysilane, methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, ethyltributoxysilane, propyltrimethoxysilane, propyltriethoxysilane, butyltrimethoxysilane, butyltriethoxy Trifunctional alkoxysilanes such as silane, phenyltrimethoxysilane, phenyltriethoxysilane, phenyltributoxysilane; dimethyldimethoxysilane, dimethyldiethoxysilane, dimethyldibutoxysilane, diethyldi Toxisilane, Diethyldiethoxysilane, Dipropyldimethoxysilane, Dipropyldiethoxysilane, Dibutyldimethoxysilane, Dibutyldiethoxysilane, Diphenyldimethoxysilane, Diphenyldiethoxysilane, Diphenyldibutoxysilane, Methylphenyldimethoxysilane, Methylphenyldiethoxy Bifunctional alkoxysilanes such as silane; tetrachlorosilane, methyltrichlorosilane, ethyltrichlorosilane, propyltrichlorosilane, phenyltrichlorosilane, vinyltrichlorosilane, dimethyldichlorosilane, diethyldichlorosilane, diphenyldichlorosilane, methylphenyldichlorosilane, etc. Chlorosilanes: tetraacetoxysilane, methyltriacetoxysilane, phenyltriacetoxy Orchids, dimethyldiacetoxysilane, such as acetoxy silanes such as diphenyl diacetoxy silane and the like, can be used one or two or more thereof. Moreover, the compound which has one reactive silyl group in 1 molecule can also be used together.
[0017]
Examples of combinations of functional groups in (3) and (4) include a hydroxyl group and an isocyanate group, an amino group and an isocyanate group, a carboxyl group and an epoxy group, an amino group and an epoxy group, and an alkoxysilyl group. The coupling agent is, for example, a compound having at least one reactive silyl group and other substituents in one molecule, specifically, β- (3,4-epoxycyclohexyl) ethyltrimethoxysilane. , Γ-glycidoxypropylmethyldiethoxysilane, γ-glycidoxypropyltriethoxysilane, N- (β-aminoethyl) -γ-aminopropylmethyldimethoxysilane, N- (β-aminoethyl) -γ- Examples thereof include aminopropyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, isocyanate functional silane, and the like, and one or more of these can be used.
[0018]
The weight ratio of the component a in the component (A) is usually 0.1 to 70% by weight in terms of SiO 2 in the resin solid content of the component (A). % Is effective.
[0019]
The term “SiO 2 conversion” refers to the weight remaining as silica (SiO 2 ) when the compound having a Si—O bond is completely hydrolyzed and then baked at 900 ° C.
In general, alkoxysilanes, silicates, and the like have the property of reacting with water to cause hydrolysis reaction to form silanol, and further causing condensation reaction between silanols or silanol and alkoxy. When this reaction is performed to the ultimate, silica (SiO 2 ) is obtained. These reactions have the general formula:
RO (Si (OR) 2 O) n R + (n + 1) H 2 O → nSiO 2 + (2n + 2) ROH
The amount of the remaining silica component is converted based on this reaction equation.
[0020]
Although it does not specifically limit as a copolymerization monomer of (A) component, An acrylic monomer can be used suitably. Examples of acrylic monomers include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and cyclohexyl (meth) acrylate. Alkyl group-containing (meth) acrylic monomers such as 2-hydroxyethyl (meth) acrylate and other hydroxyl group-containing (meth) acrylic monomers; (meth) acrylic acid and other ethylenically unsaturated carboxylic acids; dimethyl Amino group-containing (meth) acrylic monomers such as aminoethyl (meth) acrylate and dimethylaminopropyl (meth) acrylate; Amide-containing (meth) acrylic monomers such as (meth) acrylamide and ethyl (meth) acrylamide Nitrile groups such as acrylonitrile Available (meth) acrylic monomer, epoxy group-containing, such as glycidyl (meth) acrylate (meth) acrylic monomer and the like.
[0021]
In the component (A), in addition to the above monomers, aromatic hydrocarbon vinyl monomers such as styrene, methylstyrene, chlorostyrene, vinyltoluene; maleic acid, itaconic acid, crotonic acid, fumaric acid, citraconic acid, etc. Α, β-ethylenically unsaturated carboxylic acids; sulfonic acid-containing vinyl monomers such as styrene sulfonic acid and vinyl sulfonic acid; acid anhydrides such as maleic anhydride and itaconic anhydride; vinyl chloride, vinylidene chloride, chloroprene, etc. Chlorine-containing monomers of: hydroxyl-containing alkyl vinyl ethers such as hydroxyethyl vinyl ether and hydroxypropyl vinyl ether; alkylene glycol monoallyl ethers such as ethylene glycol monoallyl ether and propylene glycol monoallyl ether diethylene glycol monoallyl ether Ethers; α-olefins such as ethylene, propylene and isobutylene; vinyl esters such as vinyl acetate, vinyl propionate, vinyl butyrate and vinyl pivalate; vinyl ethers such as methyl vinyl ether, ethyl vinyl ether, butyl vinyl ether and cyclohexyl vinyl ether; ethyl allyl ether; Allyl ethers such as butyl allyl ether can also be used. In addition, an ethylenically unsaturated double bond-containing ultraviolet absorber, an ethylenically unsaturated double bond-containing light stabilizer, and the like can also be used.
[0022]
The emulsifier used for the polymerization is appropriately selected from anionic, cationic, nonionic, amphoteric, nonionic-cationic, nonionic-anionic, non-reactive, and reactive, alone or in combination. And use it. Among these, the use of a reactive emulsifier having a polyoxyalkylene chain and an unsaturated double bond is preferable because it can improve crack prevention, storage stability, and water resistance.
[0023]
As the polymerization initiator, a normal radical initiator can be used, a persulfate such as ammonium persulfate, a redox initiator consisting of a combination of hydrogen peroxide and sodium hydrogen sulfite, and a ferrous salt, Examples thereof include a system in which an inorganic initiator such as silver nitrate is mixed, a dibasic acid peroxide such as disuccinic acid peroxide and diglutaric acid peroxide, and an organic initiator such as azobisbutyronitrile. The usage-amount of a polymerization initiator is about 0.01-5 weight part with respect to 100 weight part of monomers normally.
[0024]
The weight average molecular weight of the component (A) is preferably 30,000 or more, more preferably 50,000 or more. When the molecular weight is 30000 or more, weather resistance, stain resistance, water resistance and the like can be improved. Moreover, it is desirable that the minimum film-forming temperature of the component (A) is 0 to 80 ° C. When the minimum film-forming temperature is lower than 0 ° C., the stain resistance tends to decrease, and when it is higher than 80 ° C., the coating tends to crack.
[0025]
The component (B) is a component that imparts stain resistance and crack resistance to the formed coating film of the composition of the present invention, and further has a function of improving the storage stability of the paint.
[0026]
The component (B) is a compound having a polyoxyalkylene chain having one end at the —OH group in the side chain and / or the terminal in the main chain composed of polysiloxane, and either or both of the structures shown in the following formulas It is what has.
[0027]
[Chemical 7]
[0028]
[Chemical 8]
[0029]
(R 1 and R 2 are alkyl groups or phenyl groups, R 3 is an alkylene group or phenylene group, R 4 is an alkylene group having 1 to 4 carbon atoms, and the carbon numbers may be the same or different. N is 1 or more. integer.)
[0030]
The component (B) can be produced, for example, by a hydrosilylation reaction between an allylated polyether compound and methyl hydrogen silicone oil.
[0031]
The hydroxyl value of (B) component is 5-150 KOHmg / g, Furthermore, 10-100 KOHmg / g, More preferably, it is 40-80 KOHmg / g. When the hydroxyl value is less than 5 KOHmg / g, the stain resistance decreases with time, and sufficient storage stability tends not to be ensured. When it is larger than 150 KOHmg / g, cracking is likely to occur and storage stability tends to be lowered.
[0032]
Examples of the alkylene oxide include methylene oxide, ethylene oxide, propylene oxide, butylene oxide, and among these, ethylene oxide and / or propylene oxide are preferably used.
[0033]
The number average molecular weight of the component (B) is preferably 1000 to 50000. Among these, the number average molecular weight of the alkylene oxide chain is desirably 40 to 30,000. When the number average molecular weight of the alkylene oxide chain is less than 40, sufficient physical properties cannot be obtained in terms of stain resistance, crack prevention, and storage stability. Conversely, when it is larger than 30000, the water resistance, stain resistance and weather resistance are lowered.
[0034]
(B) Content of a component is 0.1-8.0 weight part with respect to 100 weight part of solid content of (A) component. When the content of the component (B) is less than 0.1 parts by weight, sufficient physical properties cannot be obtained in terms of contamination resistance, crack prevention, and storage stability. When it is larger than 8.0 parts by weight, water resistance, weather resistance, crack prevention, recoatability, and storage stability are deteriorated.
[0035]
In the present invention, since a specific amount of the component (B) having a specific hydroxyl value is contained, the terminal —OH group of the component (B) appropriately interacts with the reactive silyl group of the component (A), and the reactivity It is presumed to suppress the rapid reaction between silyl groups. As a result, the occurrence of cracks in the coating film can be prevented. Moreover, the viscosity fluctuation | variation by reaction of the silyl group of (A) component can be suppressed also by the steric hindrance effect of (B) component also during coating-material storage. Furthermore, in this invention, the coating-film surface is hydrophilized by the polyoxyalkylene chain of (B) component, and contamination resistance can also be provided.
[0036]
In the present invention, it is desirable to contain (C) an organic solvent (hereinafter referred to as “component (C)”) having a solubility in water of 20 wt% or more. By containing such a component (C), the film-forming property at low temperature or normal temperature can be secured, and the storage stability of the paint can be improved.
[0037]
Examples of the component (C) include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, ethylene glycol isopropyl ether, ethylene glycol monobutyl ether, ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, diethylene glycol Monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monoethyl ether acetate, triethylene glycol, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether, tetraethylene glycol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, pro Examples include lenglycol monopropyl ether, dipropylene glycol monomethyl ether, 1-3 butanediol, 1-5 pentanediol, diacetone alcohol, N-methylpyrrolidone and the like, and one or more of these can be used. .
[0038]
(C) Content of a component is 3-50 weight part with respect to 100 weight part of solid content of (A) component. When the content of the component (C) is less than 3 parts by weight, it is difficult to ensure sufficient physical properties in terms of storage stability, and cracking is likely to occur during film formation. When it is larger than 50 parts by weight, the storage stability tends to decrease. In addition, as an organic solvent, unless the effect of this invention is inhibited, organic solvents other than (C) component can also be used together.
[0039]
The pH of the composition of the present invention is preferably 5 to 10, more preferably 6 to 8. By adjusting the pH within such a range, sufficient storage stability and physical properties of the coating film can be ensured. Compounds used for pH adjustment include inorganic acids such as hydrochloric acid, phosphoric acid, nitric acid and sulfuric acid; organic acids such as formic acid and acetic acid; sodium hydroxide, potassium hydroxide, sodium carbonate, ammonium carbonate, ammonia, sodium acetate, Examples include inorganic bases such as ammonium acetate, sodium silicate, and sodium phosphate; organic bases such as methylamine, dimethylamine, triethylamine, and triethanolamine. One or more of these may be used. it can.
[0040]
In addition to the above-described components, the composition of the present invention can be blended with inorganic color pigments, organic color pigments, extender pigments and the like that are usually used in paints as necessary. Further, plasticizers, preservatives, antifungal agents, antifoaming agents, thickeners, leveling agents, pigment dispersants, antisettling agents, anti-sagging agents, matting agents, ultraviolet absorbers, which do not affect the present invention, Additives such as antioxidants can be used alone or in combination.
[0041]
Examples of the inorganic coloring pigment include, for example, titanium oxide, carbon black, ferric oxide (bengara), yellow iron oxide, ocher, ultramarine blue, cobalt green, and the like. Examples of the organic coloring pigment include azo-based, naphthol-based, Pyrazolone, anthraquinone, perylene, quinacridone, disazo, isoindolinone, benzimidazole, phthalocyanine, quinophthalone, and the like can be used. Examples of extender pigments include extender pigments such as heavy calcium carbonate, clay, kaolin, talc, precipitated barium sulfate, and barium carbonate.
[0042]
The composition of the present invention can be used for surface finishing of various materials such as metal, glass, porcelain tiles, concrete, siding boards, extrusion boards, plastics, etc., mainly for the protection of buildings such as buildings and civil engineering structures. It is what you use. At this time, the water-based coating composition of the present invention is applied to the final finished surface, and can be applied directly to the substrate, or any surface treatment (such as a base treatment with a sealer, surfacer, filler, etc.) It is also possible to paint on the surface after applying), but there is no particular limitation. As a coating method, it can be applied by various methods such as brush coating, spray coating, roller coating, roll coater, and flow coater. Furthermore, it is possible to pre-coat the building material surface at a factory or the like.
[0043]
【Example】
Examples and Comparative Examples are shown below to clarify the features of the present invention.
[0044]
[Preparation of paint]
Using the raw materials as shown in Tables 1 and 2, paints were prepared according to the formulations shown in Table 3 and tested.
[0045]
[Table 1]
[0046]
[Table 2]
[0047]
[Table 3]
[0048]
[Test method]
(1) Storage stability After the prepared coating composition was stored in a thermostatic bath at 50 ° C. for 30 days, the viscosity change was confirmed. The evaluation is as follows.
A: Viscosity change less than 10% B: Viscosity change 10% to less than 30% Δ: Viscosity change 30% to less than 50% X: Viscosity change 50% or more
(2) Spray coating of SK clear sealer (acrylic resin emulsion base coat; manufactured by SK Kaken Co., Ltd.) on a flexible board with wet / cold heat resistance of 150 x 70 x 3 mm After drying in the state for 8 hours, the prepared coating composition was spray-coated so that the dry film thickness was 40 μm to prepare a test specimen. The prepared specimen was immersed in 20 ± 2 ° C. water for 18 hours in accordance with JIS K5660 4.13 (1995), then immediately cooled in a constant temperature bath maintained at −20 ± 3 ° C. for 3 hours, and then 50 ± It heated for 3 hours with another thermostat kept at 3 degreeC. After this operation was repeated 10 times, it was placed in a standard state for about 1 hour, and the state of the coating film surface was visually observed. In this case, the case where no cracks or peeling occurred was evaluated as ◯, the case where a minute crack was generated was evaluated as Δ, and the case where a crack or peeling occurred clearly was evaluated as X.
[0050]
(3) Accelerated contamination test 1
SK # 1000 primer (epoxy resin-based primer; manufactured by SK Kaken Co., Ltd.) is spray-coated on a 150 × 75 × 0.8 mm aluminum plate to a dry film thickness of 30 μm, and dried for 8 hours in a standard state. Then, the prepared coating composition was spray-coated so that the dry film thickness was 40 μm to prepare a test specimen.
The prepared specimen was dried and cured in a standard state for 7 days, and then a 15 wt% carbon black aqueous dispersion paste solution was dropped onto the coating surface so as to have a diameter of 20 mm and a height of 5 mm in a constant temperature room at 50 ° C. For 2 hours. Thereafter, it was washed in running water, and the degree of contamination of the coating film surface was visually evaluated. The evaluation is as follows.
◎: No trace is observed ○: Only a slight trace is observed Δ: A trace is observed ×: A remarkable trace is recognized [0051]
(4) Accelerated contamination test 2
Specimens were prepared in the same manner as in the accelerated contamination test 1, and these specimens were immersed in a 0.1 wt% carbon black aqueous dispersion at room temperature for 2 hours. After drying at room temperature for 2 hours, the degree of contamination on the coating film surface was evaluated by the difference in brightness (ΔL). A TC-1800 type color difference meter manufactured by Tokyo Denshoku Co., Ltd. was used for measuring the brightness difference.
[0052]
[Test results]
[Table 4]
[0053]
The test results are shown in Table 4. In Examples 1 to 6 which are the compositions of the present invention, good results were obtained in any test. In particular, Examples 2 to 4 containing an organic solvent having a hydroxyl group value of the polysiloxane compound within the most preferable range and having a high solubility in water obtained more excellent results in storage stability and stain resistance. . On the other hand, Comparative Examples 1 and 2 in which the hydroxyl value of the polysiloxane compound is outside the scope of the present invention, Comparative Examples 3 and 4 in which the content of the polysiloxane compound is outside the scope of the present invention, and Comparative Example not including the polysiloxane compound In case of 5, it was not possible to obtain sufficient results.
[0054]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, while being excellent in stain resistance, the coating film which does not produce a crack with time can be formed, and also the aqueous coating composition excellent in storage stability can be obtained. In addition, since the composition of the present invention is a one-pack type, it is a material that can reduce the complexity of painting operations.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37224899A JP3853553B2 (en) | 1999-12-28 | 1999-12-28 | Water-based paint composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP37224899A JP3853553B2 (en) | 1999-12-28 | 1999-12-28 | Water-based paint composition |
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| Publication Number | Publication Date |
|---|---|
| JP2001181556A JP2001181556A (en) | 2001-07-03 |
| JP3853553B2 true JP3853553B2 (en) | 2006-12-06 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002105405A (en) * | 2000-09-29 | 2002-04-10 | Sk Kaken Co Ltd | Low-voc water-base coating composition |
| JP4727931B2 (en) * | 2003-01-21 | 2011-07-20 | 関西ペイント株式会社 | Top coating composition |
| JP2006052297A (en) * | 2004-08-11 | 2006-02-23 | Sk Kaken Co Ltd | Water-based coating composition and method for coating |
| JP5975216B2 (en) | 2012-06-22 | 2016-08-23 | ビーエーエスエフ コーティングス ゲゼルシャフト ミット ベシュレンクテル ハフツングBASF Coatings GmbH | COATING COMPOSITION HAVING EXCELLENT RESISTANCE AND COATING OBTAINED BY COATING THE SAME |
| JP2016504436A (en) * | 2012-11-30 | 2016-02-12 | ビーエーエスエフ コーティングス ゲゼルシャフト ミット ベシュレンクテル ハフツングBASF Coatings GmbH | Coating composition excellent in stain resistance and coating film obtained by coating the same |
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