JP6984723B1 - Adhesives and adhesive sheets for polyvinyl chloride - Google Patents
Adhesives and adhesive sheets for polyvinyl chloride Download PDFInfo
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- JP6984723B1 JP6984723B1 JP2020214387A JP2020214387A JP6984723B1 JP 6984723 B1 JP6984723 B1 JP 6984723B1 JP 2020214387 A JP2020214387 A JP 2020214387A JP 2020214387 A JP2020214387 A JP 2020214387A JP 6984723 B1 JP6984723 B1 JP 6984723B1
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- Prior art keywords
- monomer
- sensitive adhesive
- mass
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- meth
- Prior art date
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- 239000004800 polyvinyl chloride Substances 0.000 title claims abstract description 47
- 229920000915 polyvinyl chloride Polymers 0.000 title claims abstract description 46
- 230000001070 adhesive effect Effects 0.000 title claims description 63
- 239000000853 adhesive Substances 0.000 title claims description 59
- 239000000178 monomer Substances 0.000 claims abstract description 166
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims abstract description 69
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 62
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 57
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 57
- 239000000203 mixture Substances 0.000 claims abstract description 34
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 14
- 239000004593 Epoxy Substances 0.000 claims abstract description 13
- 229920001577 copolymer Polymers 0.000 claims abstract description 10
- 125000000217 alkyl group Chemical group 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 24
- 239000010410 layer Substances 0.000 claims description 21
- 125000004432 carbon atom Chemical group C* 0.000 claims description 20
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 12
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 10
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 6
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 5
- 125000002947 alkylene group Chemical group 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- 239000002904 solvent Substances 0.000 abstract description 39
- 239000013522 chelant Substances 0.000 abstract description 14
- 239000012948 isocyanate Substances 0.000 abstract description 13
- 150000002513 isocyanates Chemical class 0.000 abstract description 13
- 238000010586 diagram Methods 0.000 abstract 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 37
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 36
- 238000006243 chemical reaction Methods 0.000 description 36
- -1 2-hydroxypropyl Chemical group 0.000 description 34
- 239000010408 film Substances 0.000 description 29
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 26
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 19
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 16
- 229920005989 resin Polymers 0.000 description 16
- 239000011347 resin Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 16
- 229910052757 nitrogen Inorganic materials 0.000 description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 13
- 229920000877 Melamine resin Polymers 0.000 description 13
- 239000012790 adhesive layer Substances 0.000 description 13
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 13
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 12
- 238000007667 floating Methods 0.000 description 12
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 10
- 238000010992 reflux Methods 0.000 description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- HFCUBKYHMMPGBY-UHFFFAOYSA-N 2-methoxyethyl prop-2-enoate Chemical compound COCCOC(=O)C=C HFCUBKYHMMPGBY-UHFFFAOYSA-N 0.000 description 7
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 238000001035 drying Methods 0.000 description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 6
- 229920005862 polyol Polymers 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 5
- 229920006243 acrylic copolymer Polymers 0.000 description 5
- 125000003118 aryl group Chemical group 0.000 description 5
- 239000012298 atmosphere Substances 0.000 description 5
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 239000003505 polymerization initiator Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 5
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 4
- 239000012986 chain transfer agent Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 125000005442 diisocyanate group Chemical group 0.000 description 4
- 125000003700 epoxy group Chemical group 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 150000003077 polyols Chemical class 0.000 description 4
- 230000008961 swelling Effects 0.000 description 4
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 4
- 229920001567 vinyl ester resin Polymers 0.000 description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 3
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical class C=COC=C QYKIQEUNHZKYBP-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
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 150000003440 styrenes Chemical class 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- NNOZGCICXAYKLW-UHFFFAOYSA-N 1,2-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC=C1C(C)(C)N=C=O NNOZGCICXAYKLW-UHFFFAOYSA-N 0.000 description 2
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 2
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- FWWXYLGCHHIKNY-UHFFFAOYSA-N 2-ethoxyethyl prop-2-enoate Chemical compound CCOCCOC(=O)C=C FWWXYLGCHHIKNY-UHFFFAOYSA-N 0.000 description 2
- OWHSTLLOZWTNTQ-UHFFFAOYSA-N 2-ethylhexyl 2-sulfanylacetate Chemical compound CCCCC(CC)COC(=O)CS OWHSTLLOZWTNTQ-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- QORUGOXNWQUALA-UHFFFAOYSA-N N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 Chemical compound N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 QORUGOXNWQUALA-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 2
- HIFVAOIJYDXIJG-UHFFFAOYSA-N benzylbenzene;isocyanic acid Chemical class N=C=O.N=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 HIFVAOIJYDXIJG-UHFFFAOYSA-N 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- ZQMIGQNCOMNODD-UHFFFAOYSA-N diacetyl peroxide Chemical compound CC(=O)OOC(C)=O ZQMIGQNCOMNODD-UHFFFAOYSA-N 0.000 description 2
- 239000012153 distilled water Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- LNMQRPPRQDGUDR-UHFFFAOYSA-N hexyl prop-2-enoate Chemical compound CCCCCCOC(=O)C=C LNMQRPPRQDGUDR-UHFFFAOYSA-N 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000002649 leather substitute Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 239000002798 polar solvent Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 2
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 description 1
- UWFRVQVNYNPBEF-UHFFFAOYSA-N 1-(2,4-dimethylphenyl)propan-1-one Chemical compound CCC(=O)C1=CC=C(C)C=C1C UWFRVQVNYNPBEF-UHFFFAOYSA-N 0.000 description 1
- OZCMOJQQLBXBKI-UHFFFAOYSA-N 1-ethenoxy-2-methylpropane Chemical class CC(C)COC=C OZCMOJQQLBXBKI-UHFFFAOYSA-N 0.000 description 1
- UZKWTJUDCOPSNM-UHFFFAOYSA-N 1-ethenoxybutane Chemical class CCCCOC=C UZKWTJUDCOPSNM-UHFFFAOYSA-N 0.000 description 1
- OVGRCEFMXPHEBL-UHFFFAOYSA-N 1-ethenoxypropane Chemical class CCCOC=C OVGRCEFMXPHEBL-UHFFFAOYSA-N 0.000 description 1
- JWYVGKFDLWWQJX-UHFFFAOYSA-N 1-ethenylazepan-2-one Chemical compound C=CN1CCCCCC1=O JWYVGKFDLWWQJX-UHFFFAOYSA-N 0.000 description 1
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 description 1
- IVIDDMGBRCPGLJ-UHFFFAOYSA-N 2,3-bis(oxiran-2-ylmethoxy)propan-1-ol Chemical compound C1OC1COC(CO)COCC1CO1 IVIDDMGBRCPGLJ-UHFFFAOYSA-N 0.000 description 1
- AVTLBBWTUPQRAY-UHFFFAOYSA-N 2-(2-cyanobutan-2-yldiazenyl)-2-methylbutanenitrile Chemical compound CCC(C)(C#N)N=NC(C)(CC)C#N AVTLBBWTUPQRAY-UHFFFAOYSA-N 0.000 description 1
- HLIQLHSBZXDKLV-UHFFFAOYSA-N 2-(2-hydroxyethoxy)-1-phenoxyethanol Chemical compound OCCOCC(O)OC1=CC=CC=C1 HLIQLHSBZXDKLV-UHFFFAOYSA-N 0.000 description 1
- RKUWZDGUIDYVNN-UHFFFAOYSA-N 2-(2-hydroxyethyl)butanedioic acid Chemical compound OCCC(C(O)=O)CC(O)=O RKUWZDGUIDYVNN-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
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 1
- VUDVPVOIALASLB-UHFFFAOYSA-N 2-[(2-cyano-1-hydroxypropan-2-yl)diazenyl]-3-hydroxy-2-methylpropanenitrile Chemical compound OCC(C)(C#N)N=NC(C)(CO)C#N VUDVPVOIALASLB-UHFFFAOYSA-N 0.000 description 1
- PFHOSZAOXCYAGJ-UHFFFAOYSA-N 2-[(2-cyano-4-methoxy-4-methylpentan-2-yl)diazenyl]-4-methoxy-2,4-dimethylpentanenitrile Chemical compound COC(C)(C)CC(C)(C#N)N=NC(C)(C#N)CC(C)(C)OC PFHOSZAOXCYAGJ-UHFFFAOYSA-N 0.000 description 1
- SYEWHONLFGZGLK-UHFFFAOYSA-N 2-[1,3-bis(oxiran-2-ylmethoxy)propan-2-yloxymethyl]oxirane Chemical compound C1OC1COCC(OCC1OC1)COCC1CO1 SYEWHONLFGZGLK-UHFFFAOYSA-N 0.000 description 1
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 description 1
- GNUGVECARVKIPH-UHFFFAOYSA-N 2-ethenoxypropane Chemical class CC(C)OC=C GNUGVECARVKIPH-UHFFFAOYSA-N 0.000 description 1
- VGZZAZYCLRYTNQ-UHFFFAOYSA-N 2-ethoxyethoxycarbonyloxy 2-ethoxyethyl carbonate Chemical compound CCOCCOC(=O)OOC(=O)OCCOCC VGZZAZYCLRYTNQ-UHFFFAOYSA-N 0.000 description 1
- FEWFXBUNENSNBQ-UHFFFAOYSA-N 2-hydroxyacrylic acid Chemical compound OC(=C)C(O)=O FEWFXBUNENSNBQ-UHFFFAOYSA-N 0.000 description 1
- 125000004200 2-methoxyethyl group Chemical group [H]C([H])([H])OC([H])([H])C([H])([H])* 0.000 description 1
- RZVINYQDSSQUKO-UHFFFAOYSA-N 2-phenoxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC1=CC=CC=C1 RZVINYQDSSQUKO-UHFFFAOYSA-N 0.000 description 1
- KFGFVPMRLOQXNB-UHFFFAOYSA-N 3,5,5-trimethylhexanoyl 3,5,5-trimethylhexaneperoxoate Chemical compound CC(C)(C)CC(C)CC(=O)OOC(=O)CC(C)CC(C)(C)C KFGFVPMRLOQXNB-UHFFFAOYSA-N 0.000 description 1
- FRIBMENBGGCKPD-UHFFFAOYSA-N 3-(2,3-dimethoxyphenyl)prop-2-enal Chemical compound COC1=CC=CC(C=CC=O)=C1OC FRIBMENBGGCKPD-UHFFFAOYSA-N 0.000 description 1
- QOXOZONBQWIKDA-UHFFFAOYSA-N 3-hydroxypropyl Chemical group [CH2]CCO QOXOZONBQWIKDA-UHFFFAOYSA-N 0.000 description 1
- MECNWXGGNCJFQJ-UHFFFAOYSA-N 3-piperidin-1-ylpropane-1,2-diol Chemical compound OCC(O)CN1CCCCC1 MECNWXGGNCJFQJ-UHFFFAOYSA-N 0.000 description 1
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- VFXXTYGQYWRHJP-UHFFFAOYSA-N 4,4'-azobis(4-cyanopentanoic acid) Chemical compound OC(=O)CCC(C)(C#N)N=NC(C)(CCC(O)=O)C#N VFXXTYGQYWRHJP-UHFFFAOYSA-N 0.000 description 1
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- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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Landscapes
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
【課題】低極性溶剤に対する耐溶剤性と、曲面性と、水貼り適性とを備え、さらにはリワーク性にも優れた粘着シート、および該粘着シートを形成するポリ塩化ビニル用粘着剤を提供すること。【解決手段】アクリル系樹脂（Ａ）、および硬化剤（Ｂ）を含み、アクリル系樹脂（Ａ）は、一般式（１）で表されるモノマー（ａ１）１５〜６０質量％、およびカルボキシル基を有するモノマー（ａ２）０．５〜７質量％を含むモノマー混合物の共重合体であり、硬化剤（Ｂ）は、キレート硬化剤、イソシアネート硬化剤、およびエポキシ硬化剤からなる群から選ばれる少なくとも１種である、ポリ塩化ビニルフィルム用粘着剤により解決される。【選択図】なしPROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive sheet having solvent resistance to a low-polarity solvent, curved surface property and water-sticking suitability, and further excellent in reworkability, and a pressure-sensitive adhesive for polyvinyl chloride forming the pressure-sensitive adhesive sheet. matter. SOLUTION: The acrylic resin (A) contains an acrylic resin (A) and a curing agent (B), and the acrylic resin (A) contains a monomer (a1) represented by the general formula (1) in an amount of 15 to 60% by mass and a carboxyl group. The monomer (a2) is a copolymer of a monomer mixture containing 0.5 to 7% by mass, and the curing agent (B) is at least selected from the group consisting of a chelate curing agent, an isocyanate curing agent, and an epoxy curing agent. It is solved by one kind of pressure-sensitive adhesive for a polyvinyl chloride film. [Selection diagram] None
Description
本発明は、ポリ塩化ビニルの貼り合わせに好適に使用できるポリ塩化ビニル用粘着剤および粘着シートに関する。 The present invention relates to a pressure-sensitive adhesive for polyvinyl chloride and a pressure-sensitive adhesive sheet that can be suitably used for bonding polyvinyl chloride.
オートバイ、自動車、看板、電化製品等に貼着されるラベルやステッカーには、柔軟性や耐候性などの観点から、基材としてポリ塩化ビニル（ＰＶＣ）を用いた樹脂シートが一般的に用いられ、このポリ塩化ビニルシートの裏面は、粘着剤を介して離型紙が設けられる一方、シート表面には印刷が施されている。このような、ポリ塩化ビニルを用いた粘着シートは、特にオートバイ等の用途においては、屋外で使用されるため汚れが付着しやすく、またラベルにガソリン等が付着する場合がある。そのため、ポリ塩化ビニルが膨潤し、生じる応力に粘着剤が耐え切れずに浮きや剥がれが生じてしまうという問題が生じる。 For labels and stickers attached to motorcycles, automobiles, signboards, electrical appliances, etc., resin sheets using polyvinyl chloride (PVC) as the base material are generally used from the viewpoint of flexibility and weather resistance. On the back surface of this polyvinyl chloride sheet, a release paper is provided via an adhesive, while the surface of the sheet is printed. Such an adhesive sheet using polyvinyl chloride is easily contaminated because it is used outdoors, especially in applications such as motorcycles, and gasoline or the like may adhere to the label. Therefore, there arises a problem that the polyvinyl chloride swells and the adhesive cannot withstand the generated stress, resulting in floating or peeling.
また、オートバイ、自動車、看板、電化製品等のラベルや、ステッカーの貼り合わせ面は、曲面となっていることがほとんどであり、曲面へ貼り合わせた際に時間経過と共に粘着シートが剥がれない（曲面適性）ことが求められ、加えて、オートバイ、自動車等の車体に、水貼りを行うことができる（水貼り適性）必要性もある。 In addition, most labels and stickers for motorcycles, automobiles, signs, electrical appliances, etc. have curved surfaces, and the adhesive sheet does not peel off over time when bonded to curved surfaces (curved surface). (Aptitude) is required, and in addition, there is also a need to be able to apply water to the body of a motorcycle, automobile, or the like (suitability for water application).
さらに、近年、省エネルギ−に向けた車両の軽量化の観点から、車両パーツにも樹脂を使用されることが多くなり、この樹脂パーツに対し、フィルムに色、文字、模様などを印刷して装飾効果を持たせた装飾用粘着シートであるマーキングフィルムを用いることが多くなっている。マーキングフィルムは、ポリ塩化ビニル等の基材に粘着剤層を積層させ、粘着剤層面を被着体に貼付して使用される。新興国では、まだまだ車社会が爆発的に拡大してきており、元々使われているタイヤなどのゴム製品、内装用のプラスチック製品にも、量販店でマーキングフィルムが貼られる機会も爆発的に増えている。
これら車両パーツに用いられるマーキングフィルムは、ガソリンに接触する機会が多いため、高いガソリン耐性が要求される。
Furthermore, in recent years, from the viewpoint of reducing the weight of vehicles for energy saving, resin is often used for vehicle parts, and colors, characters, patterns, etc. are printed on the film for these resin parts. Marking films, which are decorative adhesive sheets with a decorative effect, are often used. The marking film is used by laminating an adhesive layer on a substrate such as polyvinyl chloride and attaching the adhesive layer surface to an adherend. In emerging countries, the automobile society is still expanding explosively, and the opportunities for marking films to be affixed to rubber products such as tires and plastic products for interiors that were originally used at mass retailers are also explosively increasing. There is.
Since the marking film used for these vehicle parts has many opportunities to come into contact with gasoline, high gasoline resistance is required.
このような、マーキングフィルムに用いられる粘着剤として、特許文献１には、カルボキシル基含有モノマーのモル％と、アクリル酸アルキルエステルのアルキル基の平均炭素数の比が１．５〜４．５であり、架橋後のゲル分率が４０〜９０％である、粘着剤を用いることが記載されている。また、特許文献２では、粘着剤に用いられるアクリル系共重合体において、カルボキシル基含有モノマーおよび水酸基含有モノマーを用いて得られるアクリル系共重合体によって、耐ガソリン性が向上することが開示されている。 As such a pressure-sensitive adhesive used for marking films, Patent Document 1 states that the ratio of the molar% of the carboxyl group-containing monomer to the average carbon number of the alkyl group of the acrylic acid alkyl ester is 1.5 to 4.5. It is described that an adhesive having a gel content of 40 to 90% after cross-linking is used. Further, Patent Document 2 discloses that, in an acrylic copolymer used as a pressure-sensitive adhesive, the gasoline resistance is improved by an acrylic copolymer obtained by using a carboxyl group-containing monomer and a hydroxyl group-containing monomer. There is.
さらに、近年、“サスティナブル”の観点から、ガソリンの代替燃料として植物由来のバイオエタノールを利用する試みが進められており、ガソリンエンジン車でエタノール混合ガソリンの使用も始まっている。これにより、極性が低いガソリンと極性が高いエタノールの両方に対する耐性が要求されるため、粘着剤を含めたマーキングフィルムの材料選択及び設計が厳しくなっている。 Furthermore, in recent years, from the viewpoint of "sustainability", attempts have been made to use plant-derived bioethanol as an alternative fuel to gasoline, and the use of ethanol-blended gasoline in gasoline engine vehicles has also begun. As a result, resistance to both low-polarity gasoline and high-polarity ethanol is required, which makes it difficult to select and design the material of the marking film including the adhesive.
これに対し、特許文献２には、塩化ビニル系樹脂フィルムに施された、アルキル（メタ）アクリレートと、高濃度のカルボキシ基含有不飽和単量体と、を含む単量体混合物を共重合して得られるアクリル系共重合体および架橋剤を含む粘着剤組成物から形成される粘着剤層が、ガソリンおよびエタノールの混合溶媒（ガソリン：エタノール＝９０：１０、体積比）、所謂、Ｅ１０燃料に２０分浸漬した際のゾル分の重量平均分子量が２５万以上で、あり混合ガソリン耐性が優れることが開示されている。 On the other hand, in Patent Document 2, a monomer mixture containing an alkyl (meth) acrylate applied to a vinyl chloride resin film and a high-concentration carboxy group-containing unsaturated monomer is copolymerized. The pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition containing the acrylic copolymer and the cross-linking agent thus obtained is used as a mixed solvent of gasoline and ethanol (gasoline: ethanol = 90:10, volume ratio), so-called E10 fuel. It is disclosed that the weight average molecular weight of the sol after immersing for 20 minutes is 250,000 or more, and the mixed gasoline resistance is excellent.
しかし、高濃度のカルボキシ基含有不飽和単量体を共重合して得られるアクリル系共重合体から形成される粘着層は、被着体に貼り合わせた際の初期粘着力が高く、貼りなおすことができない、すなわち、リワーク性が悪いという課題がある。 However, the adhesive layer formed from the acrylic copolymer obtained by copolymerizing a high-concentration carboxy group-containing unsaturated monomer has a high initial adhesive force when attached to an adherend, and is reattached. There is a problem that it cannot be done, that is, the reworkability is poor.
すなわち本発明が解決しようとする課題は、低極性溶剤に対する耐溶剤性と、曲面性と、水貼り適性とを備え、さらにはリワーク性にも優れた粘着シート、および該粘着シートを形成するポリ塩化ビニル用粘着剤を提供することである。 That is, the problem to be solved by the present invention is an adhesive sheet having solvent resistance to a low-polarity solvent, curved surface property, and water-sticking suitability, and also having excellent reworkability, and a poly forming the adhesive sheet. It is to provide a pressure-sensitive adhesive for vinyl chloride.
本発明者らは、上記課題を解決すべく鋭意検討を重ねた結果、以下に示すポリ塩化ビニル用粘着剤により、上記課題を解決できることを見出し、本発明を完成するに至った。 As a result of diligent studies to solve the above problems, the present inventors have found that the above problems can be solved by the adhesive for polyvinyl chloride shown below, and have completed the present invention.
即ち、第１の発明は、アクリル系樹脂（Ａ）、および硬化剤（Ｂ）を含み、
アクリル系樹脂（Ａ）は、下記一般式（１）で表されるモノマー（ａ１）１５〜６０質量％、およびカルボキシル基を有するモノマー（ａ２）０．５〜７質量％を含むモノマー混合物の共重合体であり、硬化剤（Ｂ）は、キレート硬化剤、イソシアネート硬化剤、およびエポキシ硬化剤からなる群から選ばれる少なくとも１種である、ポリ塩化ビニルフィルム用粘着剤に関する。
The acrylic resin (A) is a mixture of a monomer (a1) represented by the following general formula (1) in an amount of 15 to 60% by mass and a monomer having a carboxyl group (a2) in an amount of 0.5 to 7% by mass. The polymer and the curing agent (B) relate to a pressure-sensitive adhesive for a polyvinyl chloride film, which is at least one selected from the group consisting of a chelate curing agent, an isocyanate curing agent, and an epoxy curing agent.
また、第２の発明は、前記モノマー混合物は、炭素数１〜２のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ３）を含有し、
（メタ）アクリル酸アルキルエステルモノマー（ａ３）の含有率は、モノマー混合物１００質量％中、３５〜７９．５質量％である、前記ポリ塩化ビニル用粘着剤に関する。
Further, in the second invention, the monomer mixture contains a (meth) acrylic acid alkyl ester monomer (a3) having an alkyl group having 1 to 2 carbon atoms.
The content of the (meth) acrylic acid alkyl ester monomer (a3) is 35 to 79.5% by mass in 100% by mass of the monomer mixture, according to the above-mentioned pressure-sensitive adhesive for polyvinyl chloride.
また、第３の発明は、前記モノマー混合物は、炭素数４〜１３のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ５）を含有し、
（メタ）アクリル酸アルキルエステルモノマー（ａ５）の含有率は、モノマー混合物１００質量％中、０．５〜１０質量％である、前記ポリ塩化ビニルフィルム用粘着剤に関する。
Further, in the third invention, the monomer mixture contains a (meth) acrylic acid alkyl ester monomer (a5) having an alkyl group having 4 to 13 carbon atoms.
The content of the (meth) acrylic acid alkyl ester monomer (a5) is 0.5 to 10% by mass in 100% by mass of the monomer mixture, which relates to the pressure-sensitive adhesive for polyvinyl chloride film.
また、第４の発明は、前記モノマー混合物は、水酸基を有するモノマー（ａ４）を含有し、
水酸基を有するモノマー（ａ４）の含有率は、モノマー混合物１００質量％中、０．５〜７質量％である、前記ポリ塩化ビニルフィルム用粘着剤に関する。
Further, in the fourth invention, the monomer mixture contains a monomer (a4) having a hydroxyl group, and the monomer mixture contains a monomer (a4).
The content of the monomer (a4) having a hydroxyl group is 0.5 to 7% by mass in 100% by mass of the monomer mixture, according to the pressure-sensitive adhesive for polyvinyl chloride film.
また、第５の発明は、アクリル系樹脂（Ａ）は、重量平均分子量が２０万〜６０万である、前記ポリ塩化ビニルフィルム用粘着剤に関する。 The fifth invention relates to the pressure-sensitive adhesive for a polyvinyl chloride film, wherein the acrylic resin (A) has a weight average molecular weight of 200,000 to 600,000.
また、第６の発明は、基材、および前記ポリ塩化ビニル用粘着剤から形成されてなる粘着剤層を備える粘着シート。 The sixth invention is a pressure-sensitive adhesive sheet provided with a base material and a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive for polyvinyl chloride.
また、第７の発明は、基材がポリ塩化ビニルである、前記粘着シート。 The seventh invention is the pressure-sensitive adhesive sheet, wherein the base material is polyvinyl chloride.
本発明が解決しようとする課題は、低極性溶剤に対する耐溶剤性と、曲面性と、水貼り適性とを備え、さらにリワーク性にも優れた粘着シート、および該粘着シートを形成するポリ塩化ビニル用粘着剤を提供できるようになった。 The problem to be solved by the present invention is a pressure-sensitive adhesive sheet having solvent resistance to a low-polarity solvent, curved surface property, and water-sticking suitability, and also having excellent reworkability, and polyvinyl chloride forming the pressure-sensitive adhesive sheet. It has become possible to provide adhesives for use.
本発明について詳細に説明する前に用語を定義する。まず、シート、フィルムおよびテープは、同義である。（メタ）アクリル酸とは、アクリル酸およびメタクリル酸を意味する。モノマーとは、エチレン性不飽和二重結合含有単量体を意味する。被着体とは、粘着シートを貼り付ける相手方を指す。
尚、本明細書では、ポリ塩化ビニルフィルム用粘着剤、アクリル系共重合体（Ａ）、一般式（１）で表されるモノマー（ａ１）、カルボキシル基を有するモノマー（ａ２）、炭素数１〜２のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ３）、水酸基を有するモノマー（ａ４）、および炭素数４〜１３のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ５）を、それぞれ粘着剤、共重合体（Ａ）、モノマー（ａ１）、モノマー（ａ２）、モノマー（ａ３）、モノマー（ａ４）、およびモノマー（ａ５）と略記することがある。
本明細書中に出てくる各種成分は特に注釈しない限り、それぞれ独立に１種単独で、あるいは２種以上を混合して用いてもよい。
以下に本発明の実施の形態を詳細に説明するが、以下の説明は、本発明の実施態様の一例（代表例）であり、本発明はその要旨を超えない限りこれらの内容に限定されない。
Before describing the present invention in detail, terms are defined. First, sheet, film and tape are synonymous. (Meta) acrylic acid means acrylic acid and methacrylic acid. The monomer means an ethylenically unsaturated double bond-containing monomer. The adherend refers to the other party to which the adhesive sheet is attached.
In the present specification, a pressure-sensitive adhesive for a polyvinyl chloride film, an acrylic copolymer (A), a monomer represented by the general formula (1) (a1), a monomer having a carboxyl group (a2), and 1 carbon number. A (meth) acrylic acid alkyl ester monomer (a3) having an alkyl group of ~ 2, a monomer (a4) having a hydroxyl group, and a (meth) acrylic acid alkyl ester monomer (a5) having an alkyl group having 4 to 13 carbon atoms. , A pressure-sensitive adhesive, a copolymer (A), a monomer (a1), a monomer (a2), a monomer (a3), a monomer (a4), and a monomer (a5), respectively.
Unless otherwise specified, the various components mentioned in the present specification may be used independently, individually or in combination of two or more.
Hereinafter, embodiments of the present invention will be described in detail, but the following description is an example (representative example) of embodiments of the present invention, and the present invention is not limited to these contents as long as the gist thereof is not exceeded.
《ポリ塩化ビニル用粘着剤》
本発明の粘着剤は、アクリル系樹脂（Ａ）および硬化剤（Ｂ）を含み、アクリル系樹脂（Ａ）は、一般式（１）で表されるモノマー（ａ１）１５〜６０質量％、およびカルボキシル基を有するモノマー（ａ２）０．５〜７質量％を含むモノマー混合物の共重合体であり、硬化剤（Ｂ）は、キレート硬化剤、イソシアネート硬化剤、およびエポキシ硬化剤からなる群から選ばれる少なくとも１種である。
<< Adhesive for polyvinyl chloride >>
The pressure-sensitive adhesive of the present invention contains an acrylic resin (A) and a curing agent (B), and the acrylic resin (A) is a monomer (a1) represented by the general formula (1) in an amount of 15 to 60% by mass, and The monomer (a2) having a carboxyl group is a copolymer of a monomer mixture containing 0.5 to 7% by mass, and the curing agent (B) is selected from the group consisting of a chelate curing agent, an isocyanate curing agent, and an epoxy curing agent. At least one species.
＜アクリル系樹脂（Ａ）＞
アクリル系樹脂（Ａ）は、（メタ）アクリル酸エステル等の共重合体であって、その他ビニルエステル類等を併用して用いることもできる。
用いることのできるモノマーとしては、一般式（１）で表されるモノマー（ａ１）、カルボキシル基を有するモノマー（ａ２）、炭素数１〜２のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ３）、水酸基を有するモノマー（ａ４）、および炭素数４〜１３のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ５）、アミド結合を有するモノマー、エポキシ基を有するモノマー、アミノ基を有するモノマー、スチレン類、ビニルエーテル類、ビニルエステル類のその他モノマー等を含むモノマー混合物を共重合してなる共重合体である。
<Acrylic resin (A)>
The acrylic resin (A) is a copolymer such as (meth) acrylic acid ester, and other vinyl esters and the like can also be used in combination.
Examples of the monomer that can be used include a monomer (a1) represented by the general formula (1), a monomer (a2) having a carboxyl group, and a (meth) acrylic acid alkyl ester monomer having an alkyl group having 1 to 2 carbon atoms (meth). It has a3), a monomer having a hydroxyl group (a4), a (meth) acrylic acid alkyl ester monomer (a5) having an alkyl group having 4 to 13 carbon atoms, a monomer having an amide bond, a monomer having an epoxy group, and an amino group. It is a copolymer obtained by copolymerizing a monomer mixture containing monomers, styrenes, vinyl ethers, vinyl esters and other monomers.
アクリル系樹脂（Ａ）は、一般式（１）で表されるモノマー（ａ１）１５〜６０質量％、およびカルボキシル基を有するモノマー（ａ２）０．５〜７質量％を含むモノマー混合物の共重合体である。
より好ましくは、炭素数１〜２のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ３）を含むモノマー混合物の共重合体である。
より好ましくは、水酸基を有するモノマー（ａ４）を含むモノマー混合物の共重合体である。
さらに好ましくは、炭素数４〜１３のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ５）を含むモノマー混合物の共重合体である。
The acrylic resin (A) has a copolymer weight of a monomer mixture containing 15 to 60% by mass of the monomer (a1) represented by the general formula (1) and 0.5 to 7% by mass of the monomer (a2) having a carboxyl group. It is a coalescence.
More preferably, it is a copolymer of a monomer mixture containing a (meth) acrylic acid alkyl ester monomer (a3) having an alkyl group having 1 to 2 carbon atoms.
More preferably, it is a copolymer of a monomer mixture containing a monomer (a4) having a hydroxyl group.
More preferably, it is a copolymer of a monomer mixture containing a (meth) acrylic acid alkyl ester monomer (a5) having an alkyl group having 4 to 13 carbon atoms.
本発明においてアクリル系樹脂（Ａ）の重量平均分子量（以下、Ｍｗともいう）は、２０万〜６０万が好ましく、２０万〜５０万がより好ましく、２０〜４０万が更に好ましい。
重量平均分子量が２０万〜６０万の範囲であることで、硬化剤（Ｂ）との架橋点の数を十分量確保でき、低極性溶剤に溶解しにくい粘着層とすることができるために好ましい。
In the present invention, the weight average molecular weight (hereinafter, also referred to as Mw) of the acrylic resin (A) is preferably 200,000 to 600,000, more preferably 200,000 to 500,000, still more preferably 20 to 400,000.
When the weight average molecular weight is in the range of 200,000 to 600,000, a sufficient number of cross-linking points with the curing agent (B) can be secured, and an adhesive layer that is difficult to dissolve in a low-polarity solvent can be obtained, which is preferable. ..
［モノマー（ａ１）］
モノマー（ａ−１）は、下記一般式（１）で表されるモノマーである。
このようなアルコキシアルキレンオキサイド基、アルコキシポリアルキレンオキサイド基、フェノキシアルキレンオキサイド基、またはフェノキシポリアルキレンオキサイド基、を有するモノマーを用いることで、極性を付与し、低極性溶剤（ガソリンなど）に溶解しにくい粘着剤層とすることができる。好ましくは、アルコキシアルキレンオキサイド基を有する（メタ）アクリル酸アルキルエステルモノマーである。
[Monomer (a1)]
The monomer (a-1) is a monomer represented by the following general formula (1).
By using a monomer having such an alkoxyalkylene oxide group, an alkoxypolyalkylene oxide group, a phenoxyalkylene oxide group, or a phenoxypolyalkylene oxide group, polarity is imparted and it is difficult to dissolve in a low-polarity solvent (gasoline, etc.). It can be a pressure-sensitive adhesive layer. Preferably, it is a (meth) acrylic acid alkyl ester monomer having an alkoxyalkylene oxide group.
Ｒ１は炭素数１〜２のアルキル基、またはフェニル基であり、具体的には、メチル基またはエチル基、またはフェニル基であり、耐水性と低極性溶剤に対する耐性の点から好ましくはメチル基またはエチル基である。
Ｒ２は炭素数２〜４のアルキレン基であり、直鎖状または分岐を有してもよい。具体的には、エチレン基、プロピレン基、またはブチレン基であり、耐水性と低極性溶剤に対する耐性の点から好ましくはエチレン基である。
Ｒ３は、水素原子またはメチル基である。
ｎは繰り返し単位を表し、１〜４の整数であり、耐水性と低極性溶剤に対する耐性の点から好ましくは繰り返し単位１である。
R 1 is an alkyl group or a phenyl group having 1 to 2 carbon atoms, specifically, a methyl group, an ethyl group, or a phenyl group, and is preferably a methyl group from the viewpoint of water resistance and resistance to low polar solvents. Or it is an ethyl group.
R 2 is an alkylene group having 2 to 4 carbon atoms and may have a linear or branched structure. Specifically, it is an ethylene group, a propylene group, or a butylene group, and is preferably an ethylene group from the viewpoint of water resistance and resistance to a low-polarity solvent.
R 3 is a hydrogen atom or a methyl group.
n represents a repeating unit, which is an integer of 1 to 4, and is preferably a repeating unit 1 from the viewpoint of water resistance and resistance to low-polarity solvents.
モノマー（ａ１）の含有率は、１５〜６０質量％であり、好ましくは２０〜３０質量％である。モノマー（ａ１）の含有率は多いほど、低極性溶剤性に対する耐性が良好となるため、１５質量％以上であるが、反面耐水性の悪化から水貼り適性が低下するため、６０質量％以下である。 The content of the monomer (a1) is 15 to 60% by mass, preferably 20 to 30% by mass. The higher the content of the monomer (a1), the better the resistance to low-polarity solvent properties, so the content is 15% by mass or more. be.
モノマー（ａ１）としては、例えば、（メタ）アクリル酸２−メトキシエチル、（メタ）アクリル酸２−エトキシエチル、（メタ）アクリル酸２−フェノキシエチル、メトキシポリエチレングリコール（メタ）アクリル酸エステル、エトキシポリエチレングリコール（メタ）アクリル酸エステル、メトキシポリプロピレングリコール（メタ）アクリル酸エステル、エトキシポリプロピレングリコール（メタ）アクリル酸エステル、フェノキシポリエチレングリコール（メタ）アクリル酸エステル、およびフェノキシポリプロピレングリコール（メタ）アクリル酸エステル等が挙げられる。
なお、ポリアルキレングリコール鎖の繰り返し単位は、２〜４の整数である。
これらの中でも、耐水性と低極性溶剤に対する耐性のバランスの観点からアクリル酸２−メトキシエチル、およびアクリル酸２−エトキシエチルが好ましく、（メタ）アクリル酸２−メトキシエチルがより好ましい。
Examples of the monomer (a1) include (meth) acrylic acid 2-methoxyethyl, (meth) acrylic acid 2-ethoxyethyl, (meth) acrylic acid 2-phenoxyethyl, methoxypolyethylene glycol (meth) acrylic acid ester, and ethoxy. Polyethylene glycol (meth) acrylic acid ester, methoxypolypropylene glycol (meth) acrylic acid ester, ethoxypolypropylene glycol (meth) acrylic acid ester, phenoxypolyethylene glycol (meth) acrylic acid ester, phenoxypolypropylene glycol (meth) acrylic acid ester, etc. Can be mentioned.
The repeating unit of the polyalkylene glycol chain is an integer of 2 to 4.
Among these, 2-methoxyethyl acrylate and 2-ethoxyethyl acrylate are preferable, and 2-methoxyethyl (meth) acrylate is more preferable, from the viewpoint of the balance between water resistance and resistance to low-polarity solvents.
［モノマー（ａ２）］
モノマー（ａ２）は、カルボキシ基を有するモノマーである。
モノマー（ａ２）は、アクリル系樹脂（Ａ）に粘着力を付与し、低極性溶剤により膨潤した粘着層でも粘着力と凝集力を保持し、被着体からの浮き剥がれを抑制できる。
モノマー（ａ２）の含有率は、アクリル系樹脂を構成するモノマー混合物１００質量％中、０．５〜７質量％であり、粘着力とリワーク性の両立、及び貯蔵安定性の観点から、１．０〜６質量％が好ましく、２〜５質量％がより好ましく、２〜４質量％がさらに好ましい。
この範囲であることで、リワーク性と貯蔵安定性を維持しつつ、所望の粘着特性を満足することができる。
[Monomer (a2)]
The monomer (a2) is a monomer having a carboxy group.
The monomer (a2) imparts adhesive force to the acrylic resin (A), retains the adhesive force and cohesive force even in the adhesive layer swollen by the low-polarity solvent, and can suppress the peeling from the adherend.
The content of the monomer (a2) is 0.5 to 7% by mass in 100% by mass of the monomer mixture constituting the acrylic resin, and from the viewpoint of both adhesive strength and reworkability and storage stability, 1. It is preferably 0 to 6% by mass, more preferably 2 to 5% by mass, still more preferably 2 to 4% by mass.
Within this range, desired adhesive properties can be satisfied while maintaining reworkability and storage stability.
モノマー（ａ２）としては、例えば、（メタ）アクリル酸、フタル酸モノヒドロキシエチルアクリル酸エステル、ｐ−カルボキシベンジルアクリル酸エステル、エチレンオキサイド変性（エチレンオキサイド付加モル数：（２〜１８）フタル酸アクリル酸エステル、コハク酸モノヒドロキシエチルアクリル酸エステル、アクリル酸β−カルボキシエチル、イタコン酸等が挙げられる。
これらの中でも、低極性溶剤により膨張した際の粘着力および凝集力付与の観点から（メタ）アクリル酸が好ましい。
Examples of the monomer (a2) include (meth) acrylic acid, phthalic acid monohydroxyethyl acrylic acid ester, p-carboxybenzyl acrylic acid ester, and ethylene oxide modification (number of moles of ethylene oxide added: (2 to 18) acrylic acid phthalate). Examples thereof include acid ester, monohydroxyethyl succinic acid ester, β-carboxyethyl acrylate, and itaconic acid.
Among these, (meth) acrylic acid is preferable from the viewpoint of imparting adhesive force and cohesive force when expanded by a low-polarity solvent.
［モノマー（ａ３）］
モノマー（ａ３）は、炭素数１〜２のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマーである。ただし、モノマー（ａ１）、モノマー（ａ２）、およびモノマー（ａ４）を除く。
アクリル系樹脂（Ａ）を構成するモノマーとして、モノマー（ａ３）をさらに用いることで、アクリル系樹脂の凝集力が向上し、粘着基本特性を維持しつつ、モノマー（ａ１）による耐溶剤性及びリワーク性、モノマー（ａ３）による粘着特性に対する耐溶剤性を合わせて付与できるために好ましい。
[Monomer (a3)]
The monomer (a3) is a (meth) acrylic acid alkyl ester monomer having an alkyl group having 1 to 2 carbon atoms. However, the monomer (a1), the monomer (a2), and the monomer (a4) are excluded.
By further using the monomer (a3) as the monomer constituting the acrylic resin (A), the cohesive force of the acrylic resin is improved, and the solvent resistance and rework by the monomer (a1) are maintained while maintaining the basic adhesive properties. It is preferable because it can impart both properties and solvent resistance to the adhesive properties of the monomer (a3).
モノマー（ａ３）の含有率は、モノマー混合物１００質量％中に、３５〜７９．５質量％を使用することが好ましく、４５〜７５質量％がより好ましく、５５〜７０質量％が更に好ましい。
モノマー（ａ３）をこの範囲で用いることで、アクリル系樹脂（Ａ）に凝集力を付与し、低極性溶剤により膨潤した粘着層でも凝集力を保持し、ポリ塩化ビニルフィルムの膨潤による浮き剥がれを抑制することができるために好ましい。
The content of the monomer (a3) is preferably 35 to 79.5% by mass, more preferably 45 to 75% by mass, still more preferably 55 to 70% by mass in 100% by mass of the monomer mixture.
By using the monomer (a3) in this range, the cohesive force is imparted to the acrylic resin (A), the cohesive force is maintained even in the adhesive layer swelled by the low-polarity solvent, and the polyvinyl chloride film is peeled off due to swelling. It is preferable because it can be suppressed.
モノマー（ａ３）としては、例えば、アクリル酸メチル、アクリル酸エチル、メタクリル酸メチル、メタクリル酸エチルが挙げられる。
これらの中でも、低極性溶剤に対する観点から側鎖炭素数が少ないアクリル酸メチル、アクリル酸エチルが好ましい。
Examples of the monomer (a3) include methyl acrylate, ethyl acrylate, methyl methacrylate, and ethyl methacrylate.
Among these, methyl acrylate and ethyl acrylate having a small number of side chain carbons are preferable from the viewpoint of a low-polarity solvent.
［モノマー（ａ４）］
モノマー（ａ４）は、水酸基を有するモノマーである。
アクリル系樹脂（Ａ）を構成するモノマーとして、モノマー（ａ４）をさらに用いることで、アクリル系樹脂（Ａ）の凝集力をより高め、低極性溶剤により膨潤した粘着層の凝集力をさらに保持することができる。粘着剤層の極性もより高くできることから、粘着剤層の低極性溶剤への溶解を抑え、低極性溶剤浸漬時のポリ塩化ビニルフィルムの膨潤による浮き剥がれを抑制することができる。
[Monomer (a4)]
The monomer (a4) is a monomer having a hydroxyl group.
By further using the monomer (a4) as the monomer constituting the acrylic resin (A), the cohesive force of the acrylic resin (A) is further enhanced, and the cohesive force of the adhesive layer swollen by the low-polarity solvent is further maintained. be able to. Since the polarity of the pressure-sensitive adhesive layer can be made higher, it is possible to suppress the dissolution of the pressure-sensitive adhesive layer in a low-polarity solvent and suppress the floating and peeling due to the swelling of the polyvinyl chloride film when immersed in the low-polarity solvent.
モノマー（ａ４）を用いる場合、モノマー（ａ４）の含有率は、モノマー混合物１００質量％中に、０．５〜７質量％を使用することが好ましく、１〜６質量％がより好ましく、２〜５質量％が更に好ましい。
モノマー（ａ４）をこの範囲で用いることで、アクリル系樹脂（Ａ）に、粘着基本物性、及び耐溶剤性を維持しつつ、凝集力及び極性の両方を付与でき、低極性溶剤により膨潤した粘着層でも凝集力を保持し、ポリ塩化ビニルフィルムの膨潤による浮き剥がれを抑制することができるために好ましい。また、水貼り適性と曲面性も優れたものとすることができる点で好ましい。
When the monomer (a4) is used, the content of the monomer (a4) is preferably 0.5 to 7% by mass, more preferably 1 to 6% by mass, and 2 to 6% by mass in 100% by mass of the monomer mixture. 5% by mass is more preferable.
By using the monomer (a4) in this range, it is possible to impart both cohesive force and polarity to the acrylic resin (A) while maintaining the basic adhesive properties and solvent resistance, and the adhesive swells with a low-polarity solvent. It is preferable because the cohesive force can be maintained even in the layer and the floating and peeling due to the swelling of the polyvinyl chloride film can be suppressed. Further, it is preferable in that the suitability for water application and the curved surface property can be excellent.
モノマー（ａ４）としては、例えば、（メタ）アクリル酸２−ヒドロキシエチル、（メタ）アクリル酸２−ヒドロキシプロピル、（メタ）アクリル酸３−ヒドロキシプロピル、（メタ）アクリル酸２−ヒドロキシブチル、（メタ）アクリル酸３−ヒドロキシブチル、（メタ）アクリル酸４−ヒドロキシブチル、（メタ）アクリル酸６−ヒドロキシヘキシル、（メタ）アクリル酸８−ヒドロキシオクチル等の（メタ）アクリル酸ヒドロキシアルキルエステルや、ポリエチレングリコールモノ（メタ）アクリル酸エステル、ポリプロピレングリコールモノ（メタ）アクリル酸エステル、１，４−シクロヘキサンジメタノールモノ（メタ）アクリル酸エステルなどのグリコールモノ（メタ）アクリル酸エステル、カプロラクトン変性（メタ）アクリル酸エステル、Ｎ−ヒドロキシメチル（メタ）アクリルアミド、Ｎ−ヒドロキシエチル（メタ）アクリルアミドなどのＮ−ヒドロキシアルキル（メタ）アクリルアミド等が挙げられる。 これらの中でも、（メタ）アクリル酸２−ヒドロキシエチルが好ましい。 Examples of the monomer (a4) include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, and 2-hydroxybutyl (meth) acrylate. (Meta) acrylic acid hydroxyalkyl esters such as 3-hydroxybutyl (meth) acrylic acid, 4-hydroxybutyl (meth) acrylic acid, 6-hydroxyhexyl (meth) acrylic acid, 8-hydroxyoctyl (meth) acrylic acid, etc. Glycol mono (meth) acrylic acid esters such as polyethylene glycol mono (meth) acrylic acid ester, polypropylene glycol mono (meth) acrylic acid ester, 1,4-cyclohexanedimethanol mono (meth) acrylic acid ester, caprolactone modification (meth) Examples thereof include N-hydroxyalkyl (meth) acrylamide such as acrylic acid ester, N-hydroxymethyl (meth) acrylamide, and N-hydroxyethyl (meth) acrylamide. Among these, 2-hydroxyethyl (meth) acrylate is preferable.
［モノマー（ａ５）］
モノマー（ａ５）は、炭素数４〜１３のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマーである。ただし、モノマー（ａ１）、モノマー（ａ２）、およびモノマー（ａ４）を除く。
アクリル系樹脂（Ａ）を構成するモノマーとして、モノマー（ａ５）をさらに用いることで、モノマー（ａ１）、およびモノマー（ａ３）と比較して長い側鎖を導入することができるため、側鎖の絡み合いによる凝集力を付与することができ、低極性溶剤により膨潤した粘着層でも凝集力を保持し、ポリ塩化ビニルフィルムの膨潤による浮き剥がれを抑制することができるために好ましい。より好ましくは炭素数４〜８のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマーである。
アルキル基は直鎖、分岐のいずれでも構わない。
[Monomer (a5)]
The monomer (a5) is a (meth) acrylic acid alkyl ester monomer having an alkyl group having 4 to 13 carbon atoms. However, the monomer (a1), the monomer (a2), and the monomer (a4) are excluded.
By further using the monomer (a5) as the monomer constituting the acrylic resin (A), a side chain longer than that of the monomer (a1) and the monomer (a3) can be introduced, so that the side chain of the side chain can be introduced. It is preferable because it can impart a cohesive force due to entanglement, retain the cohesive force even in an adhesive layer swelled by a low-polarity solvent, and suppress floating and peeling due to swelling of the polyvinyl chloride film. More preferably, it is a (meth) acrylic acid alkyl ester monomer having an alkyl group having 4 to 8 carbon atoms.
The alkyl group may be linear or branched.
モノマー（ａ５）を用いる場合、モノマー（ａ５）の含有率は、モノマー混合物１００質量％中に、０．５〜１０質量％を使用することが好ましく、１．５〜８質量％がより好ましく、２．５〜６質量％が更に好ましい。
モノマー（ａ５）をこの範囲で用いることで、側鎖の絡み合いによる凝集力を付与することができ、低極性溶剤により膨潤した粘着層でも凝集力を保持し、ポリ塩化ビニルフィルムの膨潤による浮き剥がれを抑制することができるために好ましい。
When the monomer (a5) is used, the content of the monomer (a5) is preferably 0.5 to 10% by mass, more preferably 1.5 to 8% by mass in 100% by mass of the monomer mixture. 2.5 to 6% by mass is more preferable.
By using the monomer (a5) in this range, the cohesive force due to the entanglement of the side chains can be imparted, the cohesive force is maintained even in the adhesive layer swollen by the low polar solvent, and the polyvinyl chloride film is lifted and peeled off due to the swollen. It is preferable because it can suppress.
モノマー（ａ５）としては、例えば、（メタ）アクリル酸ｎ−ブチル、（メタ）アクリル酸イソブチル、（メタ）アクリル酸ターシャリブチル、（メタ）アクリル酸ｎ−ペンチル、（メタ）アクリル酸ネオペンチル、（メタ）アクリル酸ｎ−ヘキシル、（メタ）アクリル酸シクロヘキシル、（メタ）アクリル酸ｎ−ペンチル、（メタ）アクリル酸ｎ−オクチル、（メタ）アクリル酸イソオクチル、（メタ）アクリル酸２−エチルヘキシル、（メタ）アクリル酸ｎ−ノニル、（メタ）アクリル酸ｎ−デシル、（メタ）アクリル酸イソデシル、（メタ）アクリル酸ウンデシル、（メタ）アクリル酸ドデシル、及び（メタ）アクリル酸トリデシル等が挙げられるが、これらに限らない。 Examples of the monomer (a5) include n-butyl (meth) acrylate, isobutyl (meth) acrylate, tertiary butyl (meth) acrylate, n-pentyl (meth) acrylate, and neopentyl (meth) acrylate. (Meta) n-hexyl acrylate, (meth) cyclohexyl acrylate, (meth) n-pentyl acrylate, (meth) n-octyl acrylate, (meth) isooctyl acrylate, (meth) 2-ethyl hexyl acrylate, Examples thereof include n-nonyl (meth) acrylate, n-decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate, and tridecyl (meth) acrylate. However, it is not limited to these.
［その他モノマー］
本発明のアクリル系樹脂（Ａ）を構成するモノマーとしては、モノマー（ａ１）、モノマー（ａ２）、モノマー（ａ３）、（モノマーａ４）、モノマー（ａ５）以外のその他任意のモノマーが使用できる。
その他モノマーとしては、アミド結合を有するモノマー、エポキシ基を有するモノマー、アミノ基を有するモノマー、芳香環を有するモノマー、スチレン類、ビニルエーテル類、ビニルエステル類、およびシアン化ビニル類等が挙げられる。
[Other monomers]
As the monomer constituting the acrylic resin (A) of the present invention, any other monomer other than the monomer (a1), the monomer (a2), the monomer (a3), the (monomer a4), and the monomer (a5) can be used.
Examples of other monomers include a monomer having an amide bond, a monomer having an epoxy group, a monomer having an amino group, a monomer having an aromatic ring, styrenes, vinyl ethers, vinyl esters, vinyl cyanide and the like.
アミド結合を有するモノマーとしては、例えば（メタ）アクリルアミド、Ｎ−メチル（メタ）アクリルアミド、Ｎ−イソプロピル（メタ）アクリルアミド、Ｎ，Ｎ−ジメチル（メタ）アクリルアミド、Ｎ，Ｎ−ジエチル（メタ）アクリルアミド、Ｎ、Ｎ−ジメチルアミノプロピル（メタ）アクリルアミド、ジアセトン（メタ）アクリルアミド、Ｎ−（ブトキシメチル）アクリルアミド等の（メタ）アクリルアミド系化合物；
Ｎ−ビニルピロリドン、Ｎ−ビニルカプロラクタム、およびアクリロイルモルホリン等の複素環を有する化合物；等が挙げられる。
Examples of the monomer having an amide bond include (meth) acrylamide, N-methyl (meth) acrylamide, N-isopropyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, and the like. (Meta) acrylamide compounds such as N, N-dimethylaminopropyl (meth) acrylamide, diacetone (meth) acrylamide, N- (butoxymethyl) acrylamide;
Compounds having a heterocycle such as N-vinylpyrrolidone, N-vinylcaprolactam, and acryloylmorpholine; and the like.
エポキシ基を有するモノマーとしては、例えば（メタ）アクリル酸グリシジル、（メタ）アクリル酸メチルグリシジル、および（メタ）アクリル酸３，４−エポキシシクロヘキシルメチル等が挙げられる。 Examples of the monomer having an epoxy group include glycidyl (meth) acrylate, methyl glycidyl (meth) acrylate, and 3,4-epoxycyclohexylmethyl (meth) acrylate.
アミノ基を有するモノマーとしては、例えば、（メタ）アクリル酸モノメチルアミノエチル、（メタ）アクリル酸モノエチルアミノエチル、（メタ）アクリル酸モノメチルアミノプロピル、および（メタ）アクリル酸モノエチルアミノプロピル等の（メタ）アクリル酸モノアルキルアミノエステル等が挙げられる。 Examples of the monomer having an amino group include monomethylaminoethyl (meth) acrylate, monoethylaminoethyl (meth) acrylate, monomethylaminopropyl (meth) acrylate, and monoethylaminopropyl (meth) acrylate. Examples thereof include (meth) acrylic acid monoalkylamino ester.
芳香環を有するモノマーは、例えばアクリル酸フェノキシエチル、アクリル酸ベンジル、（メタ）アクリル酸フェノキシジエチレングリコール、および（メタ）アクリル酸エチレンオキサイド変性ノニルフェノール等が挙げられる。 Examples of the monomer having an aromatic ring include phenoxyethyl acrylate, benzyl acrylate, phenoxydiethylene glycol (meth) acrylate, and nonylphenol modified with ethylene oxide (meth) acrylate.
芳香環を有するモノマーは、粘着力、膜硬度、耐候性等の観点から、モノマー混合物１００質量％中、０〜７質量％であることが好ましい。 The monomer having an aromatic ring is preferably 0 to 7% by mass in 100% by mass of the monomer mixture from the viewpoint of adhesive strength, film hardness, weather resistance and the like.
その他、必要に応じて、（メタ）アクリル酸シクロヘキシル、（メタ）アクリル酸プロピル、（メタ）アクリル酸イソプロピル、（メタ）アクリル酸オクタデシル、（メタ）アクリル酸イソオクタデシル、スチレン、α−メチルスチレン等のスチレン類、エチルビニルエーテル、ｎ−プロピルビニルエーテル、イソプロピルビニルエーテル、ｎ−ブチルビニルエーテル、イソブチルビニルエーテル等のビニルエーテル類、酢酸ビニル、プロピオン酸ビニル等のビニルエステル類、またはアクリロニトリル等のシアン化ビニル類等が挙げられる。 In addition, if necessary, cyclohexyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, octadecyl (meth) acrylate, isooctadecyl (meth) acrylate, styrene, α-methylstyrene, etc. Styrenes, ethyl vinyl ethers, n-propyl vinyl ethers, isopropyl vinyl ethers, n-butyl vinyl ethers, vinyl ethers such as isobutyl vinyl ethers, vinyl esters such as vinyl acetate and vinyl propionate, vinyl cyanide such as acrylonitrile, etc. Be done.
その他モノマーの含有率は、粘着力の観点から、モノマー混合物１００質量％中、０〜１０質量％であることが好ましい。その他モノマーが、アミド結合を有するモノマー、エポキシ基を有するモノマー、アミノ基を有するモノマー、または芳香環を有するモノマーである場合の含有率は、極性、架橋性、及び反応性の観点から、それぞれ０〜７質量％であることが好ましい。 The content of other monomers is preferably 0 to 10% by mass in 100% by mass of the monomer mixture from the viewpoint of adhesive strength. When the other monomer is a monomer having an amide bond, a monomer having an epoxy group, a monomer having an amino group, or a monomer having an aromatic ring, the content is 0 from the viewpoint of polarity, crosslinkability, and reactivity, respectively. It is preferably ~ 7% by mass.
［アクリル系樹脂（Ａ）の製造方法］
アクリル系樹脂（Ａ）は、モノマー混合物に重合開始剤を加え、溶液重合、塊状重合、乳化重合、各種ラジカル重合などの公知の製造方法を適宜選択して行うことができる。これらの中でも、溶液重合が、アクリル系樹脂の重量平均分子量の調整が容易である点から好ましい。
[Manufacturing method of acrylic resin (A)]
The acrylic resin (A) can be prepared by adding a polymerization initiator to the monomer mixture and appropriately selecting known production methods such as solution polymerization, bulk polymerization, emulsion polymerization and various radical polymerizations. Among these, solution polymerization is preferable because it is easy to adjust the weight average molecular weight of the acrylic resin.
前記溶液重合に使用する溶剤は、例えば、酢酸メチル、酢酸エチル、酢酸ｎ−ブチル、酢酸イソブチル、トルエン、キシレン、ヘキサン、アセトン、メチルエチルケトン、メチルイソブチルケトン、メタノール、エタノール、ｎ−プロパノール、およびイソプロパノール等が好ましく、メチルエチルケトンがより好ましい。 溶剤は単独また２種類以上を併用できる。 The solvent used for the solution polymerization is, for example, methyl acetate, ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, xylene, hexane, acetone, methyl ethyl ketone, methyl isobutyl ketone, methanol, ethanol, n-propanol, isopropanol and the like. Is preferable, and methyl ethyl ketone is more preferable. The solvent can be used alone or in combination of two or more.
前記溶液重合は、モノマー混合物１００質量部に対して重合開始剤を０．００１〜１質量部程度加えて重合を行うことが好ましい。通常、重合は、窒素気流下で、５０℃〜９０℃程度の温度で４時間〜１２時間行うことができる。また、重合の際、連鎖移動剤を使用してアクリル系樹脂の重量平均分子量を適宜調整することができる。 The solution polymerization is preferably carried out by adding about 0.001 to 1 part by mass of a polymerization initiator to 100 parts by mass of the monomer mixture. Usually, the polymerization can be carried out under a nitrogen stream at a temperature of about 50 ° C. to 90 ° C. for 4 hours to 12 hours. Further, at the time of polymerization, the weight average molecular weight of the acrylic resin can be appropriately adjusted by using a chain transfer agent.
重合開始剤としては、アゾ系化合物および有機過酸化物等を使用することができる。 As the polymerization initiator, an azo compound, an organic peroxide or the like can be used.
アゾ系化合物は、例えば２，２’−アゾビスイソブチロニトリル、２，２’−アゾビス（２−メチルブチロニトリル）、１，１’−アゾビス（シクロヘキサン１−カルボニトリル）、２，２’−アゾビス（２，４−ジメチルバレロニトリル）、２，２’−アゾビス（２，４−ジメチル−４−メトキシバレロニトリル）、ジメチル２，２’−アゾビス（２−メチルプロピオネート）、４，４’−アゾビス（４−シアノバレリック酸）、２，２’−アゾビス（２−ヒドロキシメチルプロピオニトリル）、および２，２’−アゾビス（２−（２−イミダゾリン−２−イル）プロパン）等が挙げられる。 Examples of the azo compound include 2,2'-azobisisobutyronitrile, 2,2'-azobis (2-methylbutyronitrile), 1,1'-azobis (cyclohexane1-carbonitrile), 2,2. '-Azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (2,4-dimethyl-4-methoxyvaleronitrile), dimethyl 2,2'-azobis (2-methylpropionate), 4 , 4'-azobis (4-cyanovaleric acid), 2,2'-azobis (2-hydroxymethylpropionitrile), and 2,2'-azobis (2- (2-imidazolin-2-yl) propane) ) Etc. can be mentioned.
有機過酸化物は、例えば過酸化ベンゾイル、ｔ−ブチルパーベンゾエイト、クメンヒドロパーオキシド、ジイソプロピルパーオキシジカーボネート、ジ−ｎ−プロピルパーオキシジカーボネート、ジ（２−エトキシエチル）パーオキシジカーボネート、ｔ−ブチルパーオキシネオデカノエート、ｔ−ブチルパーオキシビバレート、（３，５，５−トリメチルヘキサノイル）パーオキシド、ジプロピオニルパーオキシド、ジアセチルパーオキシド等が挙げられる。重合開始剤は単独又は２種以上、及び又は下記連鎖移動剤を併用できる。 Organic peroxides include, for example, benzoyl peroxide, t-butyl perbenzoate, cumene hydroperoxide, diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, di (2-ethoxyethyl) peroxydicarbonate. , T-Butylperoxyneodecanoate, t-Butylperoxyvivarate, (3,5,5-trimethylhexanoyl) peroxide, dipropionyl peroxide, diacetyl peroxide and the like. The polymerization initiator may be used alone or in combination of two or more, and / or the following chain transfer agents may be used in combination.
連鎖移動剤は、例えばｎ−ドデシルメルカプタン、メルカプトイソブチルアルコール、メルカプト酢酸、２−メルカプトエタノール、チオグリコール酸、チオグルコール酸２−エチルヘキシル、２，３−ジメルカプト−１−プロパノール、グリシジルメルカプタン、α−メチルスチレンダイマー、四塩化炭素、クロロホルム、およびハイドロキノン等が挙げられる。
連鎖移動剤は、モノマー混合物１００質量部に対して０．０１〜１質量部程度を使用できる。
Chain transfer agents include, for example, n-dodecyl mercaptan, mercaptoisobutyl alcohol, mercaptoacetic acid, 2-mercaptoethanol, thioglycolic acid, 2-ethylhexyl thioglycolate, 2,3-dimercapto-1-propanol, glycidyl mercaptan, α-methylstyrene. Dimer, carbon tetrachloride, chloroform, hydroquinone and the like can be mentioned.
As the chain transfer agent, about 0.01 to 1 part by mass can be used with respect to 100 parts by mass of the monomer mixture.
＜硬化剤（Ｂ）＞
硬化剤（Ｂ）は、キレート硬化剤、イソシアネート硬化剤、およびエポキシ硬化剤からなる群から選ばれる少なくとも１種である。
硬化剤（Ｂ）を用いることで、本発明による粘着剤の課題である、低極性溶剤に対する耐溶剤性と、曲面性と、水貼り適性、リワーク性に優れ、さらに、貯蔵安定性を維持することができる。これらの観点から、キレート硬化剤またはエポキシ硬化剤が好ましい。
また、キレート硬化剤またはエポキシ硬化剤の効果を補強するために、これらの硬化剤にイソシアネート硬化剤を併用することが好ましい。
併用する場合には、キレート硬化剤またはエポキシ硬化剤１００質量部に対し、イソシアネート硬化剤を０．１〜６５質量部用いることが好ましく、０．５〜２５質量部であることがより好ましい。
<Curing agent (B)>
The curing agent (B) is at least one selected from the group consisting of a chelate curing agent, an isocyanate curing agent, and an epoxy curing agent.
By using the curing agent (B), the adhesives according to the present invention have excellent solvent resistance to low-polarity solvents, curved surface properties, water application suitability, and reworkability, and further maintain storage stability. be able to. From these viewpoints, a chelate curing agent or an epoxy curing agent is preferable.
Further, in order to reinforce the effect of the chelate curing agent or the epoxy curing agent, it is preferable to use an isocyanate curing agent in combination with these curing agents.
When used in combination, the isocyanate curing agent is preferably used in an amount of 0.1 to 65 parts by mass, more preferably 0.5 to 25 parts by mass, based on 100 parts by mass of the chelate curing agent or the epoxy curing agent.
［金属キレート硬化剤］
金属キレート硬化剤は、例えば、アルミニウム、鉄、銅、亜鉛、スズ、チタン、ニッケル、アンチモン、マグネシウム、バナジウム、クロムおよびジルコニウムなどの多価金属と、アセチルアセトンまたはアセト酢酸エチルとの配位化合物等が挙げられる。
[Metal chelate hardener]
Examples of the metal chelate curing agent include polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium and zirconium, and a coordination compound of acetylacetone or ethyl acetoacetate. Can be mentioned.
金属キレート硬化剤は、アクリル系樹脂（Ａ）１００質量部に対して、０．１〜５質量部含むことが好ましい。０．１〜５質量部を含むと粘着剤層の凝集力と粘着力のバランスを取ることが容易になる。 The metal chelate curing agent is preferably contained in an amount of 0.1 to 5 parts by mass with respect to 100 parts by mass of the acrylic resin (A). If it contains 0.1 to 5 parts by mass, it becomes easy to balance the cohesive force and the adhesive force of the pressure-sensitive adhesive layer.
［イソシアネート硬化剤］
イソシアネート硬化剤は、例えば、トリレンジイソシアネート、ヘキサメチレンジイソ
ンジイソシアネート、ジフェニルメタンジイソシアネート、水添ジフェニルメタンジイソシアネート、テトラメチルキシリレンジイソシアネート、ナフタレンジイソシアネート、トリフェニルメタントリイソシアネート、およびポリメチレンポリフェニルイソシアネート等のジイソシアネートとトリメチロールプロパン等のポリオール化合物とのアダクト体、ならびにそのビュレット体、ならびにそのイソシアヌレート体、ならびに前記ジイソシアネートと、ポリエーテルポリオール、ポリエステルポリオール、アクリルポリオール、ポリブタジエンポリオール、およびポリイソプレンポリオール等のうちのいずれかのポリオールとのアダクト体などの分子内に３個以上のイソシアネート基を有する化合物； トリレンジイソシアネート、ヘキサメチレンジイソシアネート、イソホロンジイソシアネート、キシリレンジイソシアネート、水添キシリレンジイソシアネート、ジフェニルメタンジイソシアネート、水添ジフェニルメタンジイソシアネート、テトラメチルキシリレンジイソシアネート、ナフタレンジイソシアネート、トリフェニルメタントリイソシアネート、およびポリメチレンポリフェニルイソシアネート等のジイソシアネート、ならびにヘキサメチレンジイソシアネートのアロファネート体等の分子内に２個のイソシアネート基を有する化合物；等が挙げられる。これらの中でも、トリレンジイソシアネートのトリメチロールプロパンアダクト体が可塑剤吸収による性能劣化を抑えるため好ましい。なお、イソシアネート基の個数は平均個数である。
[Isocyanate curing agent]
The isocyanate curing agent may be, for example, a diisocyanate such as tolylene diisocyanate, hexamethylene disison diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, tetramethylxylylene diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate, and polymethylene polyphenyl isocyanate. Adduct with a polyol compound such as trimethylolpropane, its burette, its isocyanurate, and any of the above diisocyanates and polyether polyols, polyester polyols, acrylic polyols, polybutadiene polyols, polyisoprene polyols and the like. Compounds having three or more isocyanate groups in the molecule such as an adduct with the polyol; tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate. , Tetramethylxylylene diisocyanate, naphthalenediocyanate, triphenylmethane triisocyanate, and diisocyanates such as polymethylene polyphenyl isocyanate, and compounds having two isocyanate groups in the molecule such as an allophanate of hexamethylene diisocyanate; etc. Will be. Among these, the trimethylolpropane adduct of tolylene diisocyanate is preferable because it suppresses performance deterioration due to absorption of the plasticizer. The number of isocyanate groups is an average number.
イソシアネート硬化剤は、アクリル系樹脂（Ａ）１００質量部に対して、０．０１〜１質量部を含むことが好ましく、０．０１〜０．６質量部を含むことがより好ましく、０．０５〜０．６質量部がさらに好ましく、０．１〜０．６質量部がとくに好ましい。０．０１〜１質量部含むことでＰＶＣフィルム変形追従性および加工性により優れたものとすることができる。イソシアネート硬化剤は単独または２種以上を併用できる。例えば、カルボキシル基とエポキシ硬化剤の反応により生成した水酸基をさらにイソシアネート硬化剤で架橋するなどができるためである。 The isocyanate curing agent preferably contains 0.01 to 1 part by mass, more preferably 0.01 to 0.6 part by mass, and 0.05 by mass with respect to 100 parts by mass of the acrylic resin (A). ~ 0.6 parts by mass is more preferable, and 0.1 to 0.6 parts by mass is particularly preferable. By including 0.01 to 1 part by mass, the PVC film can be made more excellent in deformation followability and processability. The isocyanate curing agent may be used alone or in combination of two or more. For example, the hydroxyl group generated by the reaction between the carboxyl group and the epoxy curing agent can be further crosslinked with the isocyanate curing agent.
［エポキシ硬化剤］
エポキシ硬化剤は、例えば、ビスフェノールＡ−エピクロロヒドリン型のエポキシ系樹脂、エチレングリコールジグリシジルエーテル、ポリエチレングリコールジグリシジルエーテル、グリセリンジグリシジルエーテル、グリセリントリグリシジルエーテル、１，６−ヘキサンジオールジグリシジルエーテル、トリメチロールプロパントリグリシジルエーテル、ジグリシジルアニリン、Ｎ，Ｎ，Ｎ’，Ｎ’−テトラグリシジル−ｍ−キシリレンジアミン、１、３−ビス（Ｎ、Ｎ’−ジグリシジルアミノメチル）シクロヘキサン、およびＮ，Ｎ，Ｎ’，Ｎ’−テトラグリシジルアミノフェニルメタン等が挙げられる。
[Epoxy curing agent]
Examples of the epoxy curing agent include bisphenol A-epichlorohydrin type epoxy resin, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, and 1,6-hexanediol diglycidyl. Ether, trimethylolpropane triglycidyl ether, diglycidyl aniline, N, N, N', N'-tetraglycidyl-m-xylylenediamine, 1,3-bis (N, N'-diglycidylaminomethyl) cyclohexane, And N, N, N', N'-tetraglycidylaminophenylmethane and the like.
エポキシ硬化剤は、アクリル系樹脂（Ａ）１００質量部に対して、０．０１〜１質量部を含むことが好ましい。０．０１〜１質量部を含むと粘着剤層の凝集力と粘着力のバランスを取ることが容易になる。 The epoxy curing agent preferably contains 0.01 to 1 part by mass with respect to 100 parts by mass of the acrylic resin (A). If it contains 0.01 to 1 part by mass, it becomes easy to balance the cohesive force and the adhesive force of the pressure-sensitive adhesive layer.
＜粘着付与樹脂＞
なお、本発明の課題解決ができる範囲で粘着付与樹脂を含んでもよい。例えば、ロジン樹脂、テルペン樹脂、脂環族炭化水素樹脂、脂肪族石油樹脂、芳香族石油樹脂、アルキルフェノールホルムアルデヒド樹脂（油性フェノール樹脂）等が好ましい。粘着付与樹脂は、単独または２種以上を併用できる。粘着剤が粘着付与樹脂を含むことで、ポリ塩化ビニルに対する粘着力がより向上させやすい。
<Adhesive-imparting resin>
The tackifier resin may be contained as long as the problem of the present invention can be solved. For example, rosin resin, terpene resin, alicyclic hydrocarbon resin, aliphatic petroleum resin, aromatic petroleum resin, alkylphenol formaldehyde resin (oil-based phenol resin) and the like are preferable. The tackifier resin may be used alone or in combination of two or more. Since the pressure-sensitive adhesive contains a tack-imparting resin, it is easy to improve the adhesive strength to polyvinyl chloride.
粘着付与樹脂は、アクリル系樹脂（Ａ）１００質量部に対して、１０〜３０質量部配合することが好ましい。 The tackifier resin is preferably blended in an amount of 10 to 30 parts by mass with respect to 100 parts by mass of the acrylic resin (A).
粘着付与樹脂の軟化点は、８０〜１４０℃が好ましい。軟化点を８０〜１４０℃にすると粘着力および凝集力を両立することが容易となる。 The softening point of the tackifier resin is preferably 80 to 140 ° C. When the softening point is set to 80 to 140 ° C., it becomes easy to achieve both adhesive force and cohesive force.
＜その他任意成分＞
本発明の粘着剤は、他に、本発明の課題解決ができる範囲で、任意成分としてその他各種樹脂、硬化触媒、シランカップリング剤、紫外線吸収剤、光安定剤、酸化防止剤、紫外線吸収剤、老化防止剤、耐候安定剤、帯電防止剤、消泡剤、レベリング剤、剥離剤、オイル、軟化剤、染料、顔料、フィラー、充填剤等を任意に配合できる。
<Other optional ingredients>
The pressure-sensitive adhesive of the present invention also has various other resins, curing catalysts, silane coupling agents, ultraviolet absorbers, light stabilizers, antioxidants, and ultraviolet absorbers as optional components, as long as the problems of the present invention can be solved. , Anti-aging agent, weather-resistant stabilizer, antistatic agent, defoaming agent, leveling agent, release agent, oil, softening agent, dye, pigment, filler, filler and the like can be arbitrarily blended.
《粘着シート》
本発明の粘着シートは、ポリ塩化ビニルと、粘着剤層とを貼付するために用いられるが、粘着シートが有する基材がポリ塩化ビニルであってもよく、または被着体がポリ塩化ビニルである場合であってもよい。
すなわち本発明の粘着剤は、ポリ塩化ビニルの貼り合わせ用粘着剤として好適であり、一般ラベル・シール、粘着性光学フィルム、弾性壁材、塗膜防水材、床材、シーリング剤、成形材料ウレタンフォーム（硬質、半硬質、軟質）、吸音材料、制振材料、各種成形材料、弾性繊維、人工皮革、合成皮革等に使用できるが、これらに限らない。
なかでも低極性溶剤に対する耐溶剤性、曲面性、および水貼り適性に優れることから、基材にポリ塩化ビニルを用いた粘着シートとし、被着体として車両パーツ等に用いられるマーキングフィルムとして好適に用いることができる。
《Adhesive sheet》
The pressure-sensitive adhesive sheet of the present invention is used for attaching the polyvinyl chloride and the pressure-sensitive adhesive layer, but the base material of the pressure-sensitive adhesive sheet may be polyvinyl chloride, or the adherend may be polyvinyl chloride. It may be the case.
That is, the pressure-sensitive adhesive of the present invention is suitable as a pressure-sensitive adhesive for bonding polyvinyl chloride, and is suitable for general labels / seals, adhesive optical films, elastic wall materials, coating film waterproofing materials, flooring materials, sealing agents, and molding materials urethane. It can be used for foam (hard, semi-hard, soft), sound absorbing material, vibration damping material, various molding materials, elastic fiber, artificial leather, synthetic leather, etc., but is not limited to these.
Among them, since it has excellent solvent resistance to low-polarity solvents, curved surface properties, and water-sticking suitability, it is suitable as an adhesive sheet using polyvinyl chloride as a base material and as a marking film used for vehicle parts as an adherend. Can be used.
粘着シートは、基材、および本発明の粘着剤から形成した粘着剤層を備えていることが好ましい。また別の態様として、芯材の両面に粘着剤層を有する両面粘着シート、または基材および芯材を有さず粘着剤層のみで構成されたキャスト粘着シートも好ましい。前記粘着剤層は、粘着剤を剥離性シート上に塗工し、乾燥して粘着剤層を形成した後、基材を貼り合わせることで形成できる。または、粘着剤を基材上に塗工し、乾燥することで形成できる。 The pressure-sensitive adhesive sheet preferably includes a base material and a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive of the present invention. As another embodiment, a double-sided pressure-sensitive adhesive sheet having pressure-sensitive adhesive layers on both sides of the core material, or a cast pressure-sensitive adhesive sheet composed of only the pressure-sensitive adhesive layer without a base material and a core material is also preferable. The pressure-sensitive adhesive layer can be formed by applying a pressure-sensitive adhesive on a peelable sheet, drying to form a pressure-sensitive adhesive layer, and then laminating a base material. Alternatively, it can be formed by applying an adhesive on a substrate and drying it.
＜ポリ塩化ビニル＞
基材、または被着体として用いられるポリ塩化ビニルは、塩化ビニルモノマーを重合させた後、可塑剤等の添加剤にて軟質化・安定化させた樹脂をフィルム状に成形したもの等である。重合条件や添加剤の調整により優れた耐久性、耐候性、耐薬品性、透明性、加工性を発現する。非常に低価格で製造可能なことから、工業材、建築材、自動車部材は勿論、消費者が使用する一般消費財としても広く用いられている。
また、ポリ塩化ビニルフィルムの厚さは、用途により適宜選択することができ、特に制限されないが、好ましくは２５μｍ〜２０００ｍｍ程度である。
<Polyvinyl chloride>
Polyvinyl chloride used as a base material or an adherend is a film formed by polymerizing a vinyl chloride monomer and then softening and stabilizing it with an additive such as a plasticizer. .. Excellent durability, weather resistance, chemical resistance, transparency, and processability are exhibited by adjusting the polymerization conditions and additives. Since it can be manufactured at a very low price, it is widely used not only as industrial materials, building materials, and automobile parts, but also as general consumer goods used by consumers.
The thickness of the polyvinyl chloride film can be appropriately selected depending on the intended use, and is not particularly limited, but is preferably about 25 μm to 2000 mm.
＜粘着剤層＞
粘着剤層は、アクリル系樹脂（Ａ）および硬化剤（Ｂ）を含み、アクリル系樹脂（Ａ）および硬化剤（Ｂ）を含有するアクリル系粘着剤を用いて形成することができる。
このような粘着剤層であることにより、良好な耐溶剤性、曲面性、水貼り適性を有することができる。
<Adhesive layer>
The pressure-sensitive adhesive layer contains an acrylic resin (A) and a curing agent (B), and can be formed by using an acrylic pressure-sensitive adhesive containing the acrylic resin (A) and the curing agent (B).
With such a pressure-sensitive adhesive layer, it is possible to have good solvent resistance, curved surface property, and water-sticking suitability.
前記粘着剤を塗工する際に、溶液重合で説明した溶剤を添加して粘度を調整することができる。 When applying the pressure-sensitive adhesive, the viscosity can be adjusted by adding the solvent described in solution polymerization.
粘着剤の塗工方法は、特に制限は無く、例えばマイヤーバー、アプリケーター、刷毛、スプレー、ローラー、グラビアコーター、ダイコーター、リップコーター、コンマコーター、ナイフコーター、リバースコ−ター、およびスピンコーター等が挙げられる。塗工に際して乾燥工程を行うことが好ましい。乾燥装置は、特に制限は無く、例えば熱風乾燥機、赤外線ヒーターおよび減圧法等が挙げられる。乾燥温度は、通常６０〜１４０℃程度である。 The method of applying the adhesive is not particularly limited, and examples thereof include a Meyer bar, an applicator, a brush, a spray, a roller, a gravure coater, a die coater, a lip coater, a comma coater, a knife coater, a reverse coater, and a spin coater. Be done. It is preferable to perform a drying step at the time of coating. The drying device is not particularly limited, and examples thereof include a hot air dryer, an infrared heater, and a decompression method. The drying temperature is usually about 60 to 140 ° C.
粘着剤層の厚さは、１〜３００μｍが好ましく、５〜１００μｍがより好ましい。１〜３００μｍの範囲にあることで粘着物性を適切な範囲に調整できる。 The thickness of the pressure-sensitive adhesive layer is preferably 1 to 300 μm, more preferably 5 to 100 μm. The adhesive physical properties can be adjusted to an appropriate range by being in the range of 1 to 300 μm.
＜基材＞
粘着シートの基材は、ポリ塩化ビニル以外にも、例えばセロハン、その他プラスチック、ゴム、発泡体、布帛、ゴムびき布、樹脂含浸布、ガラス、および木材等を用いることができる。基材の形状は、板状およびフィルム状を選択できるが、取り扱いが容易であるフィルム状が好ましい。基材は、単独または２種以上の積層体を使用できる。
<Base material>
As the base material of the pressure-sensitive adhesive sheet, for example, cellophane, other plastics, rubber, foam, cloth, rubberized cloth, resin-impregnated cloth, glass, wood and the like can be used in addition to polyvinyl chloride. The shape of the base material can be selected from a plate shape and a film shape, but a film shape that is easy to handle is preferable. As the base material, a single material or a laminated body of two or more kinds can be used.
前記その他プラスチック基材は、例えばポリビニルアルコール、トリアセチルセルロース、ポリプロピレン、ポリエチレン、ポリシクロオレフィン、エチレン−酢酸ビニル共重合体等のポリオレフィン；ポリエチレンテレフタレート、ポリブチレンテレフタレート、およびポリエチレンナフタレート等のポリエステル；ポリウレタン、ポリカーボネート、ポリノルボルネン、ポリアリレート、ポリアクリル、ポリフェニレンサルファイドム、ポリスチレン、ポリアミド、およびポリイミド等が挙げられる。 The other plastic substrate may be, for example, a polyolefin such as polyvinyl alcohol, triacetyl cellulose, polypropylene, polyethylene, polycycloolefin, ethylene-vinyl acetate copolymer; polyester such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate; polyester; polyurethane. , Polycarbonate, Polynorbornen, Polyallylate, Polyacrylic, Polyphenylene sulfide, Polyester, Polyester, Polyester and the like.
次に本発明の実施例を示して更に詳細を説明するが、本発明はこれらによって限定されるものではない。例中、「部」とは「質量部」、「％」とは「質量部」をそれぞれ意味するものとする。また、表中の配合量は、質量部であり、溶剤以外は、不揮発分換算値である。尚、表中の空欄は配合していないことを表す。 Next, examples of the present invention will be shown and further described in detail, but the present invention is not limited thereto. In the example, "part" means "part by mass" and "%" means "part by mass". The blending amount in the table is a part by mass, and is a non-volatile content conversion value except for the solvent. The blanks in the table indicate that they are not mixed.
なお、アクリル系樹脂の重量平均分子量（Ｍｗ）の測定方法を下記に示す。 The method for measuring the weight average molecular weight (Mw) of the acrylic resin is shown below.
［重量平均分子量（Ｍｗ）の測定］
重量平均分子量（Ｍｗ）の測定は、ＧＰＣを用いた。ＧＰＣは溶媒（ＴＨＦ；テトラヒドロフラン）に溶解した物質をその分子サイズの差によって分離定量する液体クロマトグラフィーであり、Ｍｗの決定はポリスチレン換算で行った。
装置名 ： 島津製作所製、
ＬＣ−ＧＰＣシステム「Ｐｒｏｍｉｎｅｎｃｅ」
カラム ： 東ソー社製ＧＭＨＸＬ ４本、東ソー（株）製ＨＸＬ-Ｈ １本を直列連結
移動相溶媒 ： テトラヒドロフラン
流量 ： １．０ｍｌ／分
カラム温度 ： ４０℃
[Measurement of weight average molecular weight (Mw)]
GPC was used for the measurement of the weight average molecular weight (Mw). GPC is a liquid chromatography in which a substance dissolved in a solvent (THF; tetrahydrofuran) is separated and quantified by the difference in its molecular size, and Mw is determined in terms of polystyrene.
Device name: Shimadzu Corporation,
LC-GPC system "Prominence"
Column: 4 GMHXL manufactured by Tosoh Corporation and 1 HXL-H manufactured by Tosoh Corporation connected in series Mobile phase solvent: Tetrahydrofuran Flow rate: 1.0 ml / min Column temperature: 40 ° C.
実施例および比較例で用いた材料の略語を下記に記載する。
＜モノマー（ａ１）＞
ＭＥＡ：アクリル酸２−メトキシエチル
ＥＥＡ：アクリル酸２−エトキシエチル
＜モノマー（ａ２）＞
ＡＡ ：アクリル酸
ＭＡＡ ：メタクリル酸
＜モノマー（ａ３）＞
ＭＡ ：アクリル酸メチル（アルキル基の炭素数；１）
ＥＡ ：アクリル酸エチル（アルキル基の炭素数；２）
＜モノマー（ａ４）＞
ＨＥＡ ：アクリル酸２−ヒドロキシエチル
ＨＥＭＡ：メタクリル酸２−ヒドロキシエチル
＜モノマー（ａ５）＞
ＢＡ ：アクリル酸ブチル（アルキル基の炭素数；４）
ＨＡ ：アクリル酸ｎ−ヘキシル（アルキル基の炭素数；６）
２ＥＨＡ：アクリル酸２−エチルヘキシル（アルキル基の炭素数；８）
ＤＡ ：アクリル酸ｎ−ドデシル（アルキル基の炭素数；１２）
＜硬化剤（Ｂ）＞
アルミキレートＡ：アルミニウムトリスアセチルアセトネート（川研ファインケミカル社製）
ＴＤＩ／ＴＭＰ：トリレンジイソシアネートのトリメチロールプロパンアダクト体
ＴＥＴＲＡＤ−Ｘ：Ｎ，Ｎ，Ｎ’，Ｎ’−テトラグリシジル−１，３−ベンゼンジ（メタンアミン）
＜重合開始剤＞
ＡＩＢＮ：２，２’−アゾビスイソブチロニトリル
＜連鎖移動剤＞
連鎖移動剤；チオグリコール酸２−エチルヘキシル
The abbreviations for the materials used in the examples and comparative examples are described below.
<Monomer (a1)>
MEA: 2-methoxyethyl acrylate EEA: 2-ethoxyethyl acrylate <monomer (a2)>
AA: Acrylic acid MAA: Methacrylic acid <Monomer (a3)>
MA: Methyl acrylate (carbon number of alkyl group; 1)
EA: Ethyl acrylate (carbon number of alkyl group; 2)
<Monomer (a4)>
HEA: 2-Hydroxyethyl acrylate HEMA: 2-Hydroxyethyl methacrylate <monomer (a5)>
BA: Butyl acrylate (carbon number of alkyl group; 4)
HA: n-hexyl acrylate (carbon number of alkyl group; 6)
2EHA: 2-ethylhexyl acrylate (carbon number of alkyl group; 8)
DA: n-dodecyl acrylate (carbon number of alkyl group; 12)
<Curing agent (B)>
Aluminum Chelate A: Aluminum Tris Acetylacetone (manufactured by Kawaken Fine Chemical Co., Ltd.)
TDI / TMP: Trimethylolpropane adduct of toluene diisocyanate TETRAD-X: N, N, N', N'-tetraglycidyl-1,3-benzenedi (methaneamine)
<Polymerization initiator>
AIBN: 2,2'-azobisisobutyronitrile <chain transfer agent>
Chain transfer agent; 2-ethylhexyl thioglycolate
＜アクリル系樹脂の製造＞
（アクリル系樹脂（Ａ−１））
反応容器に窒素雰囲気下、メチルエチルケトン４２部、アクリル酸ブチル１０．０部、アクリル酸エチル６６．０部、アクリル酸２−メトキシエチル２０．０部、アクリル酸２．０部、アクリル酸２−ヒドロキシエチル２．０部、メチルエチルケトン４９．０部、２，２’−アゾビスイソブチロニトリル（以下、ＡＩＢＮ）０．０４部を仕込んだ。撹拌しながら加熱を行い重合反応の開始を確認して還流温度で３時間反応した。次いで、ＡＩＢＮ ０．０３部を反応溶液に添加し１時間反応し、さらにＡＩＢＮ ０．０３部を反応溶液に添加し３時間反応を継続した。その後、反応容器を冷却し、重量平均分子量３２万のアクリル系樹脂（Ａ−１）溶液を得た。
<Manufacturing of acrylic resin>
(Acrylic resin (A-1))
In a reaction vessel under a nitrogen atmosphere, 42 parts of methyl ethyl ketone, 10.0 parts of butyl acrylate, 66.0 parts of ethyl acrylate, 20.0 parts of 2-methoxyethyl acrylate, 2.0 parts of acrylate, 2-hydroxy acrylate. 2.0 parts of ethyl, 49.0 parts of methyl ethyl ketone, and 0.04 part of 2,2'-azobisisobutyronitrile (hereinafter referred to as AIBN) were charged. Heating was performed with stirring to confirm the start of the polymerization reaction, and the reaction was carried out at the reflux temperature for 3 hours. Then, 0.03 part of AIBN was added to the reaction solution and reacted for 1 hour, and 0.03 part of AIBN was further added to the reaction solution and the reaction was continued for 3 hours. Then, the reaction vessel was cooled to obtain an acrylic resin (A-1) solution having a weight average molecular weight of 320,000.
（アクリル系樹脂（Ａ−２〜２１）、アクリル系樹脂（ＡＣ−１〜３））
表１〜３に示すモノマー組成、および配合量（質量部）とした以外は、アクリル系樹脂（Ａ−１）と同様にして、アクリル系樹脂（Ａ−２〜２１）、及びアクリル系樹脂（ＡＣ−１）〜アクリル系樹脂（ＡＣ−１〜３）を得た。
(Acrylic resin (A-2 to 21), Acrylic resin (AC-1 to 3))
Acrylic resins (A-2 to 21) and acrylic resins (A-2 to 21) are the same as the acrylic resins (A-1) except that the monomer compositions and blending amounts (parts by mass) shown in Tables 1 to 3 are used. AC-1) to acrylic resins (AC-1 to 3) were obtained.
（アクリル系樹脂（Ａ−２２））
撹拌機、温度計、還流冷却管、滴下装置、窒素導入管を備えた反応容器（以下、単に「反応容器」と記述する。）に窒素雰囲気下、メチルエチルケトン４２部、アクリル酸ブチル１０．０部、アクリル酸エチル６１．０部、アクリル酸２−メトキシエチル２５．０部、アクリル酸２．０部、アクリル酸２−ヒドロキシエチル２．０部、メチルエチルケトン６１．０部、２，２’−アゾビスイソブチロニトリル（以下、ＡＩＢＮ）０．０４部、チオグルコール酸２−エチルヘキシル０．０５部を仕込んだ。撹拌しながら加熱を行い重合反応の開始を確認して還流温度で３時間反応した。次いで、ＡＩＢＮ ０．０３部を反応溶液に添加し１時間反応し、さらにＡＩＢＮ ０．０３部を反応溶液に添加し３時間反応を継続した。その後、反応容器を冷却し、重量平均分子量１５万のアクリル系樹脂（Ａ−２２）溶液を得た。
(Acrylic resin (A-22))
In a reaction vessel equipped with a stirrer, a thermometer, a reflux condenser, a dropping device, and a nitrogen introduction tube (hereinafter, simply referred to as "reaction vessel"), 42 parts of methyl ethyl ketone and 10.0 parts of butyl acrylate under a nitrogen atmosphere. , Ethyl acrylate 61.0 parts, 2-methoxyethyl acrylate 25.0 parts, acrylate 2.0 parts, 2-hydroxyethyl acrylate 2.0 parts, Methyl ethyl ketone 61.0 parts, 2,2'-azo 0.04 part of bisisobutyronitrile (hereinafter referred to as AIBN) and 0.05 part of 2-ethylhexyl thioglucolate were charged. Heating was performed with stirring to confirm the start of the polymerization reaction, and the reaction was carried out at the reflux temperature for 3 hours. Then, 0.03 part of AIBN was added to the reaction solution and reacted for 1 hour, and 0.03 part of AIBN was further added to the reaction solution and the reaction was continued for 3 hours. Then, the reaction vessel was cooled to obtain an acrylic resin (A-22) solution having a weight average molecular weight of 150,000.
（アクリル系樹脂（Ａ−２３））
撹拌機、温度計、還流冷却管、滴下装置、窒素導入管を備えた反応容器（以下、単に「反応容器」と記述する。）に窒素雰囲気下、メチルエチルケトン４２部、アクリル酸ブチル１０．０部、アクリル酸エチル６１．０部、アクリル酸２−メトキシエチル２５．０部、アクリル酸２．０部、アクリル酸２−ヒドロキシエチル２．０部、メチルエチルケトン６１．０部、２，２’−アゾビスイソブチロニトリル（以下、ＡＩＢＮ）０．０４部、チオグルコール酸２−エチルヘキシル０．０３部を仕込んだ。撹拌しながら加熱を行い重合反応の開始を確認して還流温度で３時間反応した。次いで、ＡＩＢＮ ０．０３部を反応溶液に添加し１時間反応し、さらにＡＩＢＮ ０．０３部を反応溶液に添加し３時間反応を継続した。その後、反応容器を冷却し、重量平均分子量２０万のアクリル系樹脂（Ａ−２３）溶液を得た。
(Acrylic resin (A-23))
In a reaction vessel equipped with a stirrer, a thermometer, a reflux condenser, a dropping device, and a nitrogen introduction tube (hereinafter, simply referred to as "reaction vessel"), 42 parts of methyl ethyl ketone and 10.0 parts of butyl acrylate under a nitrogen atmosphere. , Ethyl acrylate 61.0 parts, 2-methoxyethyl acrylate 25.0 parts, acrylate 2.0 parts, 2-hydroxyethyl acrylate 2.0 parts, Methyl ethyl ketone 61.0 parts, 2,2'-azo 0.04 part of bisisobutyronitrile (hereinafter referred to as AIBN) and 0.03 part of 2-ethylhexyl thioglucolate were charged. Heating was performed with stirring to confirm the start of the polymerization reaction, and the reaction was carried out at the reflux temperature for 3 hours. Then, 0.03 part of AIBN was added to the reaction solution and reacted for 1 hour, and 0.03 part of AIBN was further added to the reaction solution and the reaction was continued for 3 hours. Then, the reaction vessel was cooled to obtain an acrylic resin (A-23) solution having a weight average molecular weight of 200,000.
（アクリル系樹脂（Ａ−２４））
撹拌機、温度計、還流冷却管、滴下装置、窒素導入管を備えた反応容器（以下、単に「反応容器」と記述する。）に窒素雰囲気下、メチルエチルケトン３０部、酢酸エチル１２部、アクリル酸ブチル１０．０部、アクリル酸エチル６１．０部、アクリル酸２−メトキシエチル２５．０部、アクリル酸２．０部、アクリル酸２−ヒドロキシエチル２．０部、メチルエチルケトン６１．０部、２，２’−アゾビスイソブチロニトリル（以下、ＡＩＢＮ）０．０４部を仕込んだ。撹拌しながら加熱を行い重合反応の開始を確認して還流温度で３時間反応した。次いで、ＡＩＢＮ ０．０３部を反応溶液に添加し１時間反応し、さらにＡＩＢＮ ０．０３部を反応溶液に添加し３時間反応を継続した。その後、反応容器を冷却し、重量平均分子量６０万のアクリル系樹脂（Ａ−２４）溶液を得た。
(Acrylic resin (A-24))
A reaction vessel equipped with a stirrer, a thermometer, a reflux condenser, a dropping device, and a nitrogen introduction tube (hereinafter, simply referred to as "reaction vessel") is provided with 30 parts of methyl ethyl ketone, 12 parts of ethyl acetate, and acrylic acid under a nitrogen atmosphere. 10.0 parts of butyl, 61.0 parts of ethyl acrylate, 25.0 parts of 2-methoxyethyl acrylate, 2.0 parts of acrylate, 2.0 parts of 2-hydroxyethyl acrylate, 61.0 parts of methyl ethyl ketone, 2 , 2'-Azobisisobutyronitrile (hereinafter referred to as AIBN) 0.04 part was charged. Heating was performed with stirring to confirm the start of the polymerization reaction, and the reaction was carried out at the reflux temperature for 3 hours. Then, 0.03 part of AIBN was added to the reaction solution and reacted for 1 hour, and 0.03 part of AIBN was further added to the reaction solution and the reaction was continued for 3 hours. Then, the reaction vessel was cooled to obtain an acrylic resin (A-24) solution having a weight average molecular weight of 600,000.
（アクリル系樹脂（Ａ−２５））
撹拌機、温度計、還流冷却管、滴下装置、窒素導入管を備えた反応容器（以下、単に「反応容器」と記述する。）に窒素雰囲気下、メチルエチルケトン２１部、酢酸エチル２１部、アクリル酸ブチル１０．０部、アクリル酸エチル６１．０部、アクリル酸２−メトキシエチル２５．０部、アクリル酸２．０部、アクリル酸２−ヒドロキシエチル２．０部、メチルエチルケトン６１．０部、２，２’−アゾビスイソブチロニトリル（以下、ＡＩＢＮ）０．０４部を仕込んだ。撹拌しながら加熱を行い重合反応の開始を確認して還流温度で３時間反応した。次いで、ＡＩＢＮ ０．０３部を反応溶液に添加し１時間反応し、さらにＡＩＢＮ ０．０３部を反応溶液に添加し３時間反応を継続した。その後、反応容器を冷却し、重量平均分子量７０万のアクリル系樹脂（Ａ−２５）溶液を得た。
(Acrylic resin (A-25))
A reaction vessel equipped with a stirrer, a thermometer, a reflux condenser, a dropping device, and a nitrogen introduction tube (hereinafter, simply referred to as "reaction vessel") is provided with 21 parts of methyl ethyl ketone, 21 parts of ethyl acetate, and acrylic acid under a nitrogen atmosphere. 10.0 parts of butyl, 61.0 parts of ethyl acrylate, 25.0 parts of 2-methoxyethyl acrylate, 2.0 parts of acrylate, 2.0 parts of 2-hydroxyethyl acrylate, 61.0 parts of methyl ethyl ketone, 2 , 2'-Azobisisobutyronitrile (hereinafter referred to as AIBN) 0.04 part was charged. Heating was performed with stirring to confirm the start of the polymerization reaction, and the reaction was carried out at the reflux temperature for 3 hours. Then, 0.03 part of AIBN was added to the reaction solution and reacted for 1 hour, and 0.03 part of AIBN was further added to the reaction solution and the reaction was continued for 3 hours. Then, the reaction vessel was cooled to obtain an acrylic resin (A-25) solution having a weight average molecular weight of 700,000.
（実施例１）
合成例１で得られたアクリル系樹脂溶液中のアクリル系樹脂（Ａ−１）１００部（不揮発分）に対して、金属キレート硬化剤としてアルミキレートＡ１．０部と、イソシアネート硬化剤としてＴＤＩ／ＴＭＰ（トリレンジイソシアネートのトリメチロールプロパンアダクト体）０．３部（不揮発分換算）を配合し、更に溶剤として酢酸エチルを加えて不揮発分を５０％に調整してアクリル系粘着剤を得た。
前記アクリル系粘着剤を、厚さ７５μｍの市販剥離性シート上に、乾燥後の厚さが２５μｍになるようにコンマコーターで塗工を行い、１００℃で２分間乾燥することで粘着剤層を形成した。次いで、この粘着剤層に、厚さ５０μｍのポリ塩化ビニルフィルムを貼り合せ、温度２５℃―５０％ＲＨ条件で１週間熟成することで「剥離性シート／粘着剤層／ＰＶＣシート」という構成の粘着シートを得た。
(Example 1)
For 100 parts (nonvolatile content) of the acrylic resin (A-1) in the acrylic resin solution obtained in Synthesis Example 1, 1.0 part of aluminum chelate A as a metal chelate curing agent and TDI / as an isocyanate curing agent. 0.3 part (non-volatile content equivalent) of TMP (trimethylol propan adduct body of tolylene diisocyanate) was blended, and ethyl acetate was further added as a solvent to adjust the non-volatile content to 50% to obtain an acrylic pressure-sensitive adhesive.
The acrylic pressure-sensitive adhesive is coated on a commercially available peelable sheet having a thickness of 75 μm with a comma coater so that the thickness after drying becomes 25 μm, and dried at 100 ° C. for 2 minutes to form a pressure-sensitive adhesive layer. Formed. Next, a polyvinyl chloride film having a thickness of 50 μm is attached to this pressure-sensitive adhesive layer and aged for one week at a temperature of 25 ° C. to 50% RH to form a “release sheet / pressure-sensitive adhesive layer / PVC sheet”. I got an adhesive sheet.
（実施例２〜２８、比較例１〜６）
材料を表１〜３の組成、及び配合量に変更した以外は、実施例１と同様に行うことで、実施例２〜２８および比較例１〜６のアクリル系粘着剤、および粘着シートをそれぞれ得た。
(Examples 2-28, Comparative Examples 1-6)
By performing the same procedure as in Example 1 except that the materials were changed to the compositions and blending amounts in Tables 1 to 3, the acrylic pressure-sensitive adhesives and pressure-sensitive adhesive sheets of Examples 2 to 28 and Comparative Examples 1 to 6 were obtained, respectively. Obtained.
＜粘着シートの評価＞
粘着シートの耐溶剤性、曲面性、水貼り適性、及びリワーク性の評価を以下の方法で行った。結果を表１〜３に示す。
なお、評価に用いた「メラミン塗装板」とは、幅７０ｍｍ、長さ１５０ｍｍの大きさである黒色メラミンが表面コーティングされた金属板である。
<Evaluation of adhesive sheet>
The solvent resistance, curved surface property, water application suitability, and reworkability of the adhesive sheet were evaluated by the following methods. The results are shown in Tables 1-3.
The "melamine-coated plate" used for the evaluation is a metal plate surface-coated with black melamine having a width of 70 mm and a length of 150 mm.
＜耐溶剤性＞
得られた粘着シートを幅３０ｍｍ、長さ５０ｍｍの大きさに切り出した。温度２３℃、相対湿度５０％雰囲気下、切り出した粘着シートから剥離性シートを剥がして露出した粘着剤層を、メラミン塗装板に貼り付け、２ｋｇロールにより１往復させて圧着後２４時間放置した試料を作製した。上記条件により作製した試料を幅１００ｍｍ、長さ２００ｍｍ、高さ５０ｍｍのプラスチック製容器に入れ、更にＥ２５燃料（ ガソリン：エタノール＝ ７５：２５、体積比）１００ｇをプラスチック製容器に入れて３０分間静置した。その後、粘着シートが貼りつけられたメラミン塗装板を取り出し、メラミン塗装板からの粘着シートの浮き・剥がれ具合を目視にて評価した。評価基準は以下の通りである。
［評価基準］
○：粘着シートの浮き・ハガレが認められない。良好。
△：粘着シートのハガレなく、浮きが５本未満認められるが、取り出し１時間後に元に戻る。実用可能。
×：粘着シートのハガレなく、浮きが認められ、取り出し１時間後に元に戻らない。使用できず、実用不可。
<Solvent resistance>
The obtained adhesive sheet was cut into a size having a width of 30 mm and a length of 50 mm. A sample in which the peelable sheet was peeled off from the cut-out adhesive sheet under an atmosphere of a temperature of 23 ° C. and a relative humidity of 50%, the exposed adhesive layer was attached to a melamine-coated plate, reciprocated once with a 2 kg roll, and left for 24 hours after crimping. Was produced. Place the sample prepared under the above conditions in a plastic container with a width of 100 mm, a length of 200 mm, and a height of 50 mm, and then put 100 g of E25 fuel (gasoline: ethanol = 75:25, volume ratio) in the plastic container and allow it to stand for 30 minutes. Placed. Then, the melamine-coated plate to which the adhesive sheet was attached was taken out, and the floating / peeling condition of the adhesive sheet from the melamine-coated plate was visually evaluated. The evaluation criteria are as follows.
[Evaluation criteria]
◯: No floating or peeling of the adhesive sheet is observed. Good.
Δ: There is no peeling of the adhesive sheet, and less than 5 floats are observed, but the adhesive sheet returns to its original state 1 hour after removal. Practical.
X: The adhesive sheet was not peeled off, and floating was observed, and it did not return to its original state 1 hour after removal. Cannot be used and cannot be used practically.
＜曲面性＞
得られた粘着シートを幅２５ｍｍ、長さ１００ｍｍの大きさに準備した。次いで２５℃相対湿度５０％雰囲気下、前記粘着シートを直径６０ｍｍの金属製の棒に円周に沿うように貼りあわせて試料を作製した。上記試料を２５℃相対湿度５０％雰囲気下に７日間静置した後、金属製の棒からの粘着シート端部の浮き・ハガレ具合を目視にて評価した。評価基準は以下の通りである。
［評価基準］
◎：粘着シート端部の浮き・ハガレが認められない。優良。
○：０．２ｍｍ未満の粘着シート端部の浮き・ハガレがあった。実用上問題なく、良好。
△：０．２ｍｍ以上０．５ｍｍ未満の粘着シート端部の浮き・ハガレがあった。実用可能。
×：０．５ｍｍ以上の粘着シート端部の浮き・ハガレがあり使用できない。実用不可。
<Curved surface>
The obtained adhesive sheet was prepared to a size of 25 mm in width and 100 mm in length. Next, the adhesive sheet was attached to a metal rod having a diameter of 60 mm along the circumference in an atmosphere of 25 ° C. and a relative humidity of 50% to prepare a sample. After allowing the sample to stand in an atmosphere of 25 ° C. and 50% relative humidity for 7 days, the floating / peeling condition of the edge of the adhesive sheet from the metal rod was visually evaluated. The evaluation criteria are as follows.
[Evaluation criteria]
⊚: No floating or peeling of the edge of the adhesive sheet is observed. Excellent.
◯: There was floating / peeling at the edge of the adhesive sheet less than 0.2 mm. Good for practical use.
Δ: There was floating / peeling at the end of the adhesive sheet of 0.2 mm or more and less than 0.5 mm. Practical.
X: Cannot be used due to floating / peeling at the edge of the adhesive sheet of 0.5 mm or more. Not practical.
＜水貼り適性＞
得られた粘着シートを幅２５ｍｍ、長さ１００ｍｍの大きさに切り出した。温度２３℃、相対湿度５０％雰囲気下、切り出した粘着シートから剥離性シートを剥がして露出した粘着剤層を、表面全体に蒸留水をスプレーしたメラミン塗装板に貼付け、２ｋｇロールをメラミン塗装板表面の水滴を逃がすように往復させ、はみ出した水を拭き取った後、圧着後２４時間放置した試料を作製した。蒸留水をスプレーしない以外は同様にして、標準試料を作製した。前記水貼り試料と標準試料について、引張試験機を用いて、剥離速度３００ｍｍ／分、剥離角度１８０度の条件で剥離試験を行い、剥離強度（Ｎ／２５ｍｍ）を比較し、標準（水貼りなし）に対する剥離強度率を求めた。
剥離強度率（％）＝水貼り試料の剥離強度／標準試料の剥離強度×１００
［評価基準］
◎：標準に対して剥離強度９０％以上である。優良。
○：標準に対して剥離強度７０％以上９０％未満である。実用上問題なく、良好。
△：標準に対して剥離強度５０%以上７０％未満である。実用可能。
×：標準に対して剥離強度５０％未満であり使用できない。実用不可。
<Applicability for watering>
The obtained adhesive sheet was cut into a size of 25 mm in width and 100 mm in length. Under an atmosphere of temperature 23 ° C and relative humidity 50%, the peelable sheet was peeled off from the cut-out adhesive sheet, and the exposed adhesive layer was attached to a melamine-coated plate sprayed with distilled water over the entire surface, and a 2 kg roll was applied to the melamine-coated plate surface. A sample was prepared, which was reciprocated so as to allow the water droplets to escape, wiped off the squeezed water, and then left for 24 hours after crimping. Standard samples were prepared in the same manner except that distilled water was not sprayed. The water-coated sample and the standard sample were subjected to a peeling test using a tensile tester under the conditions of a peeling speed of 300 mm / min and a peeling angle of 180 degrees, and the peeling strength (N / 25 mm) was compared. ) Was determined.
Peeling strength rate (%) = Peeling strength of water-coated sample / Peeling strength of standard sample x 100
[Evaluation criteria]
⊚: The peel strength is 90% or more with respect to the standard. Excellent.
◯: The peel strength is 70% or more and less than 90% with respect to the standard. Good for practical use.
Δ: The peel strength is 50% or more and less than 70% with respect to the standard. Practical.
X: The peel strength is less than 50% of the standard and cannot be used. Not practical.
＜再剥離性（リワーク性）＞
得られた粘着シートを幅２５ｍｍ、長さ１００ｍｍの大きさに切り出した。温度２３℃、相対湿度５０％雰囲気下、切り出した粘着シートから剥離性シートを剥がして露出した粘着剤層を、メラミン塗装板に貼り付けた試料を作製した。次いで貼り合わせた直後の粘着シートを１８０度方向に手はがしする試験を実施し、手はがし試験後のサンプルを再度、メラミン塗装板に貼り合わせた。手はがし時の剥離力、再度貼り合わせ後の粘着シートの外観観察から再剥離性を４段階で評価した。
［評価基準］
◎：メラミン塗装板からはがす際に力を要さず、再度貼り合わせた際の外観不良が見られない。優良。
〇：メラミン塗装板からはがす際に力を要さず、再度貼り合わせた際の外観不良が少ない。良好。
△：メラミン塗装板からはがす際に力を要し、再度貼り合わせた際の外観不良が少ない。実用可能。
×：メラミン塗装板からはがす際に力を要し、再度貼り合わせた際に外観不良がみられる。実用不可。
<Removability (reworkability)>
The obtained adhesive sheet was cut into a size of 25 mm in width and 100 mm in length. A sample was prepared in which the peelable sheet was peeled off from the cut-out adhesive sheet under an atmosphere of a temperature of 23 ° C. and a relative humidity of 50%, and the exposed adhesive layer was attached to a melamine-coated plate. Next, a test was carried out in which the adhesive sheet immediately after the bonding was peeled off by hand in the 180-degree direction, and the sample after the hand peeling test was again bonded to the melamine-coated plate. The re-peelability was evaluated on a 4-point scale from the peeling force at the time of hand peeling and the appearance observation of the adhesive sheet after re-bonding.
[Evaluation criteria]
⊚: No force is required to remove it from the melamine-coated plate, and there is no appearance defect when it is reattached. Excellent.
〇: No force is required to remove it from the melamine-coated plate, and there are few appearance defects when reattached. Good.
Δ: Force is required when peeling from the melamine-coated plate, and there is little appearance defect when reattached. Practical.
X: Force is required when peeling from the melamine-coated plate, and poor appearance is observed when reattached. Not practical.
表１〜３に示すように、アクリル系樹脂（Ａ）、および硬化剤（Ｂ）を含み、アクリル系樹脂（Ａ）が、一般式（１）で表されるモノマー（ａ１）１５〜６０質量％、およびカルボキシル基を有するモノマー（ａ２）０．５〜７質量％を含むモノマー混合物の共重合体であり、硬化剤（Ｂ）が、キレート硬化剤、イソシアネート硬化剤、およびエポキシ硬化剤からなる群から選ばれる少なくとも１種である、本発明のポリ塩化ビニル用粘着剤は、比較例の粘着剤比べ、ポリ塩化ビニルフィルムを基材として用いた場合にも、低極性溶剤に対する耐溶剤性（Ｅ２５燃料（ガソリン：エタノール＝７５：２５、体積比）、曲面性、水貼り適正、及び再剥離性が良好であることが確認できた。
As shown in Tables 1 to 3, the acrylic resin (A) contains the acrylic resin (A) and the curing agent (B), and the monomer (a1) represented by the general formula (1) has a mass of 15 to 60. % And a monomer mixture containing 0.5 to 7% by mass of the monomer (a2) having a carboxyl group, and the curing agent (B) comprises a chelate curing agent, an isocyanate curing agent, and an epoxy curing agent. The pressure-sensitive adhesive for polyvinyl chloride of the present invention, which is at least one selected from the group, is more resistant to a low-polarity solvent even when a polyvinyl chloride film is used as a base material, as compared with the pressure-sensitive adhesive of the comparative example. It was confirmed that the E25 fuel (gasoline: ethanol = 75: 25, volume ratio), curved surface, proper water application, and removability were good.
Claims (6)
アクリル系樹脂（Ａ）は、下記一般式（１）で表されるモノマー（ａ１）１５〜６０質量％、カルボキシル基を有するモノマー（ａ２）０．５〜７質量％、および炭素数１〜２のアルキル基を有する（メタ）アクリル酸アルキルエステルモノマー（ａ３）３５〜７９．５質量％を含むモノマー混合物の共重合体であり、
硬化剤（Ｂ）は、キレート硬化剤、およびエポキシ硬化剤からなる群から選ばれる少なくとも１種である、ポリ塩化ビニルフィルム用粘着剤。
（一般式（１）中、Ｒ１は炭素数１〜２のアルキル基、またはフェニル基、Ｒ２は炭素数２〜４のアルキレン基、Ｒ３は、水素原子またはメチル基、ｎは繰り返し単位を表し、１〜４の整数である。） Contains an acrylic resin (A) and a curing agent (B),
The acrylic resin (A) contains 15 to 60% by mass of the monomer (a1) represented by the following general formula (1), 0.5 to 7% by mass of the monomer having a carboxyl group (a2), and 1 to 2 carbon atoms. It is a copolymer of a monomer mixture containing 35 to 79.5% by mass of a (meth) acrylic acid alkyl ester monomer (a3) having an alkyl group of.
Curing agent (B), chelating curing agent is at least one selected from the group consisting of contact and epoxy curing agents, adhesives for polyvinyl chloride film.
(In the general formula (1), R 1 is an alkyl group or a phenyl group having 1 to 2 carbon atoms, R 2 is an alkylene group having 2 to 4 carbon atoms, R 3 is a hydrogen atom or a methyl group, and n is a repeating unit. Represents an integer of 1 to 4.)
（メタ）アクリル酸アルキルエステルモノマー（ａ５）の含有率は、モノマー混合物１００質量％中、０．５〜１０質量％である、請求項１記載のポリ塩化ビニル用粘着剤。 The monomer mixture contains a (meth) acrylic acid alkyl ester monomer (a5) having an alkyl group having 4 to 13 carbon atoms.
(Meth) content of the acrylic acid alkyl ester monomer (a5) of the monomer mixture in 100% by mass, from 0.5 to 10 wt%, claim 1 Symbol placement of polyvinyl chloride pressure-sensitive adhesive.
水酸基を有するモノマー（ａ４）の含有率は、モノマー混合物１００質量％中、０．５〜７質量％である、請求項１または２記載のポリ塩化ビニル用粘着剤。 The monomer mixture contains a monomer (a4) having a hydroxyl group and contains.
The pressure-sensitive adhesive for polyvinyl chloride according to claim 1 or 2 , wherein the content of the monomer (a4) having a hydroxyl group is 0.5 to 7% by mass in 100% by mass of the monomer mixture.
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| JPH05105857A (en) * | 1991-08-21 | 1993-04-27 | Sekisui Chem Co Ltd | Self-adhesive composition and self-adhesive tape, label, or sheet |
| JPH0987597A (en) * | 1995-09-28 | 1997-03-31 | Oji Paper Co Ltd | Releasable tacky adhesive sheet |
| JP2006068446A (en) * | 2004-09-06 | 2006-03-16 | Nitto Denko Corp | Pressure-sensitive adhesive sheet for sticking skin |
| JP2019070078A (en) * | 2017-10-10 | 2019-05-09 | リンテック株式会社 | Adhesive sheet |
| JP2019112574A (en) * | 2017-12-26 | 2019-07-11 | 東亞合成株式会社 | Decorative film and decorative molding having the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20230157067A (en) * | 2022-05-09 | 2023-11-16 | 주식회사 티티티 | Adhesive composition and adhesive processed article comprising same |
| KR102677480B1 (en) | 2022-05-09 | 2024-06-25 | 주식회사 티티티 | Adhesive composition and adhesive processed article comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022101456A (en) | 2022-07-06 |
| JP2022100429A (en) | 2022-07-06 |
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