CN111742022B - Double-sided adhesive sheet and use thereof - Google Patents
Double-sided adhesive sheet and use thereof Download PDFInfo
- Publication number
- CN111742022B CN111742022B CN201980014184.8A CN201980014184A CN111742022B CN 111742022 B CN111742022 B CN 111742022B CN 201980014184 A CN201980014184 A CN 201980014184A CN 111742022 B CN111742022 B CN 111742022B
- Authority
- CN
- China
- Prior art keywords
- meth
- mass
- double
- adhesive
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000853 adhesive Substances 0.000 title claims abstract description 145
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 137
- 239000011347 resin Substances 0.000 claims abstract description 67
- 229920005989 resin Polymers 0.000 claims abstract description 67
- 239000000203 mixture Substances 0.000 claims abstract description 35
- 239000011162 core material Substances 0.000 claims abstract description 33
- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 29
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 15
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 37
- 239000012790 adhesive layer Substances 0.000 claims description 28
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 21
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 21
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 21
- 208000013403 hyperactivity Diseases 0.000 abstract 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 77
- -1 n-octyl Chemical group 0.000 description 42
- 239000000178 monomer Substances 0.000 description 38
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 34
- 239000010410 layer Substances 0.000 description 21
- 239000010408 film Substances 0.000 description 14
- 239000012948 isocyanate Substances 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 229920000642 polymer Polymers 0.000 description 9
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 8
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- CERQOIWHTDAKMF-UHFFFAOYSA-N alpha-methacrylic acid Natural products CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 8
- 239000003505 polymerization initiator Substances 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical class CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 8
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical class O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 7
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 125000002723 alicyclic group Chemical group 0.000 description 6
- 239000005056 polyisocyanate Substances 0.000 description 6
- 229920001228 polyisocyanate Polymers 0.000 description 6
- 229920005862 polyol Polymers 0.000 description 6
- 229920001577 copolymer Polymers 0.000 description 5
- 238000001035 drying Methods 0.000 description 5
- 238000005227 gel permeation chromatography Methods 0.000 description 5
- 150000003077 polyols Chemical class 0.000 description 5
- 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 4
- 229920002799 BoPET Polymers 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 4
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 4
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 239000001294 propane Substances 0.000 description 4
- 150000003505 terpenes Chemical class 0.000 description 4
- 235000007586 terpenes Nutrition 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000013032 Hydrocarbon resin Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 125000003118 aryl group Chemical group 0.000 description 3
- JFDZBHWFFUWGJE-UHFFFAOYSA-N benzonitrile Chemical compound N#CC1=CC=CC=C1 JFDZBHWFFUWGJE-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical group CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 3
- 235000010985 glycerol esters of wood rosin Nutrition 0.000 description 3
- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 3
- 229910002804 graphite Inorganic materials 0.000 description 3
- 239000010439 graphite Substances 0.000 description 3
- DMEGYFMYUHOHGS-UHFFFAOYSA-N heptamethylene Natural products C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 3
- 229920006270 hydrocarbon resin Polymers 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 229920002577 polybenzoxazole Polymers 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229930195734 saturated hydrocarbon Natural products 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 3
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 2
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 2
- SXIFAEWFOJETOA-UHFFFAOYSA-N 4-hydroxy-butyl Chemical group [CH2]CCCO SXIFAEWFOJETOA-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- RGSFGYAAUTVSQA-UHFFFAOYSA-N Cyclopentane Chemical compound C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 2
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Chemical class 0.000 description 2
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 239000003522 acrylic cement Substances 0.000 description 2
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 2
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 2
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 2
- 125000004183 alkoxy alkyl group Chemical group 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 125000003368 amide group Chemical group 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- RDOXTESZEPMUJZ-UHFFFAOYSA-N anisole Chemical compound COC1=CC=CC=C1 RDOXTESZEPMUJZ-UHFFFAOYSA-N 0.000 description 2
- 125000003710 aryl alkyl group Chemical group 0.000 description 2
- 125000005160 aryl oxy alkyl group Chemical group 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 2
- 239000001273 butane Substances 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000012986 chain transfer agent Substances 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical compound C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000003999 initiator Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 229910021382 natural graphite Inorganic materials 0.000 description 2
- TVMXDCGIABBOFY-UHFFFAOYSA-N octane Chemical compound CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 2
- FDPIMTJIUBPUKL-UHFFFAOYSA-N pentan-3-one Chemical compound CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 2
- 150000002978 peroxides Chemical class 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical group C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 1
- BEQKKZICTDFVMG-UHFFFAOYSA-N 1,2,3,4,6-pentaoxepane-5,7-dione Chemical compound O=C1OOOOC(=O)O1 BEQKKZICTDFVMG-UHFFFAOYSA-N 0.000 description 1
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 1
- MTZUIIAIAKMWLI-UHFFFAOYSA-N 1,2-diisocyanatobenzene Chemical compound O=C=NC1=CC=CC=C1N=C=O MTZUIIAIAKMWLI-UHFFFAOYSA-N 0.000 description 1
- ZTNJGMFHJYGMDR-UHFFFAOYSA-N 1,2-diisocyanatoethane Chemical compound O=C=NCCN=C=O ZTNJGMFHJYGMDR-UHFFFAOYSA-N 0.000 description 1
- 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
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 1
- OVBFMUAFNIIQAL-UHFFFAOYSA-N 1,4-diisocyanatobutane Chemical compound O=C=NCCCCN=C=O OVBFMUAFNIIQAL-UHFFFAOYSA-N 0.000 description 1
- DFPJRUKWEPYFJT-UHFFFAOYSA-N 1,5-diisocyanatopentane Chemical compound O=C=NCCCCCN=C=O DFPJRUKWEPYFJT-UHFFFAOYSA-N 0.000 description 1
- ATOUXIOKEJWULN-UHFFFAOYSA-N 1,6-diisocyanato-2,2,4-trimethylhexane Chemical compound O=C=NCCC(C)CC(C)(C)CN=C=O ATOUXIOKEJWULN-UHFFFAOYSA-N 0.000 description 1
- WGYZMNBUZFHYRX-UHFFFAOYSA-N 1-(1-methoxypropan-2-yloxy)propan-2-ol Chemical compound COCC(C)OCC(C)O WGYZMNBUZFHYRX-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
- HASUCEDGKYJBDC-UHFFFAOYSA-N 1-[3-[[bis(oxiran-2-ylmethyl)amino]methyl]cyclohexyl]-n,n-bis(oxiran-2-ylmethyl)methanamine Chemical compound C1OC1CN(CC1CC(CN(CC2OC2)CC2OC2)CCC1)CC1CO1 HASUCEDGKYJBDC-UHFFFAOYSA-N 0.000 description 1
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 description 1
- BRNRSIMZYFACBR-UHFFFAOYSA-N 1-diacetylalumanylethanone Chemical compound CC(=O)[Al](C(C)=O)C(C)=O BRNRSIMZYFACBR-UHFFFAOYSA-N 0.000 description 1
- SDXHBDVTZNMBEW-UHFFFAOYSA-N 1-ethoxy-2-(2-hydroxyethoxy)ethanol Chemical compound CCOC(O)COCCO SDXHBDVTZNMBEW-UHFFFAOYSA-N 0.000 description 1
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 2,3-dimethylbutane Chemical group CC(C)C(C)C ZFFMLCVRJBZUDZ-UHFFFAOYSA-N 0.000 description 1
- YHYCMHWTYHPIQS-UHFFFAOYSA-N 2-(2-hydroxyethoxy)-1-methoxyethanol Chemical compound COC(O)COCCO YHYCMHWTYHPIQS-UHFFFAOYSA-N 0.000 description 1
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-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
- WFSMVVDJSNMRAR-UHFFFAOYSA-N 2-[2-(2-ethoxyethoxy)ethoxy]ethanol Chemical compound CCOCCOCCOCCO WFSMVVDJSNMRAR-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
- WTYYGFLRBWMFRY-UHFFFAOYSA-N 2-[6-(oxiran-2-ylmethoxy)hexoxymethyl]oxirane Chemical compound C1OC1COCCCCCCOCC1CO1 WTYYGFLRBWMFRY-UHFFFAOYSA-N 0.000 description 1
- CKSAKVMRQYOFBC-UHFFFAOYSA-N 2-cyanopropan-2-yliminourea Chemical compound N#CC(C)(C)N=NC(N)=O CKSAKVMRQYOFBC-UHFFFAOYSA-N 0.000 description 1
- XIXPBVLOLRFPNE-UHFFFAOYSA-N 2-cyclopropylpropanenitrile Chemical compound N#CC(C)C1CC1 XIXPBVLOLRFPNE-UHFFFAOYSA-N 0.000 description 1
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
- BWLBGMIXKSTLSX-UHFFFAOYSA-N 2-hydroxyisobutyric acid Chemical compound CC(C)(O)C(O)=O BWLBGMIXKSTLSX-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
- RCEJCSULJQNRQQ-UHFFFAOYSA-N 2-methylbutanenitrile Chemical compound CCC(C)C#N RCEJCSULJQNRQQ-UHFFFAOYSA-N 0.000 description 1
- DHAYMZPYIJEENJ-UHFFFAOYSA-N 2-methylpropan-1-amine dihydrate Chemical compound O.O.CC(C)CN DHAYMZPYIJEENJ-UHFFFAOYSA-N 0.000 description 1
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- COZQDNPLORIALF-UHFFFAOYSA-N 3-hydroxy-2-methylpropanenitrile Chemical compound OCC(C)C#N COZQDNPLORIALF-UHFFFAOYSA-N 0.000 description 1
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- WOZZOSDBXABUFO-UHFFFAOYSA-N tri(butan-2-yloxy)alumane Chemical compound [Al+3].CCC(C)[O-].CCC(C)[O-].CCC(C)[O-] WOZZOSDBXABUFO-UHFFFAOYSA-N 0.000 description 1
- JLGLQAWTXXGVEM-UHFFFAOYSA-N triethylene glycol monomethyl ether Chemical compound COCCOCCOCCO JLGLQAWTXXGVEM-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L93/00—Compositions of natural resins; Compositions of derivatives thereof
- C08L93/04—Rosin
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/124—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present on both sides of the carrier, e.g. double-sided adhesive tape
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
The invention provides a double-sided adhesive sheet which is a film, has strong adhesive force, inhibits adhesive hyperactivity and further has re-sticking adaptability. A double-sided adhesive sheet having adhesive agent layers formed of an adhesive agent composition on both sides of a core material, the adhesive agent composition containing 100 parts by mass of a (meth) acrylic copolymer, 40 to 70 parts by mass of a tackifier resin, and 0.01 to 5 parts by mass of a crosslinking agent, wherein the thickness of the core material is 1 to 12 μm, the thickness of the adhesive agent layers on both sides of the core material is 1 to 12 μm, and specific conditions are satisfied.
Description
Technical Field
The present invention relates to a double-sided adhesive sheet, a method for producing the same, and use thereof.
Background
Conventionally, adhesive sheets (tapes) have been widely used for fixing parts of OA equipment and electronic equipment. In recent years, OA equipment and electronic equipment have been reduced in thickness and size, and the pressure-sensitive adhesive sheet used for fixing these components has also been required to be reduced in thickness.
Generally, the thinner the adhesive sheet, the weaker the adhesive force, but thinner and more strongly adhesive sheets are demanded in the market. On the other hand, since strength is reduced due to reduction in weight and size of the members, breakage of the members at the time of re-adhesion is also a problem, and a strong adhesive tape having re-adhesion suitability is required.
As an adhesive sheet for fixing parts of OA equipment or electronic equipment, for example, patent document 1 describes an adhesive sheetA tape assembly comprising a substrate and an adhesive layer on at least one surface of the substrate, wherein the substrate has a 25% compressive strength in the thickness direction of 300kPa or less, a total thickness of 250 [ mu ] m or less, and a probe tack of 2.0N/cm2The above.
Patent document 2 describes a double-sided adhesive sheet for fixing members constituting a portable electronic device, the double-sided adhesive sheet including an acrylic adhesive layer having an acrylic polymer containing 9 to 30 mass% of a structural unit derived from a polar monomer as a base polymer, the acrylic adhesive layer having a thickness of 280 μm or more.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2016-89145
Patent document 2: japanese laid-open patent publication No. 2015-147873
Disclosure of Invention
Problems to be solved by the invention
However, neither patent document 1 nor patent document 2 mention the characteristics of being a film, but having strong adhesion and capable of being reattached.
The present invention has been made in view of the above problems, and has found that a double-sided pressure-sensitive adhesive sheet having a core material and a pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive composition having a predetermined composition applied to both sides of the core material has high adhesive strength even though it is a thin film, suppresses increase in adhesion, and imparts suitability for re-application, thereby solving the above problems.
Means for solving the problems
That is, the present invention includes the following.
[1] A double-sided adhesive sheet comprising a core material and, superimposed on each of both sides thereof, an adhesive layer formed from an adhesive composition comprising 100 parts by mass of a (meth) acrylic copolymer, 40 to 70 parts by mass of a tackifier resin and 0.01 to 5 parts by mass of a crosslinking agent, wherein the core material has a thickness of 1 to 12 μm and the adhesive layers superimposed on both sides of the core material have a thickness of 1 to 12 μm, and wherein the following conditions (i) and (ii) are satisfied:
(i) and the adhesive surface of the adhesive layer is attached to a SUS plate, and the adhesive force A is 1000-1600 g/25mm measured after the SUS plate is placed in an environment of 25 ℃/50% RH for 20 minutes.
(ii) The adhesive surface of the adhesive layer was bonded to an SUS plate, and the adhesive force was measured after the SUS plate was left for 24 hours at 25 ℃/50% RH, and the value of adhesive force B/adhesive force A was 1.00 to 1.25, where B represents the measured adhesive force.
[2] The double-sided adhesive sheet according to the aforementioned item [1], wherein the tackifier resin contains a styrene-based tackifier resin and a rosin-based tackifier resin.
[3] The double-sided adhesive sheet according to the aforementioned item [2], wherein the content of the styrenic tackifier resin is larger than the content of the rosin tackifier resin.
[4] A double-sided adhesive sheet according to the above item [3], wherein the styrene-based tackifier resin is contained in an amount of 20 to 35 parts by mass, and the rosin-based tackifier resin is contained in an amount of 18 to 32 parts by mass.
[5] A double-sided adhesive sheet according to the above item [4], wherein the styrene-based tackifier resin is contained in an amount of 27 to 35 parts by mass, and the rosin-based tackifier resin is contained in an amount of 26 to 30 parts by mass.
[6] The double-sided adhesive sheet according to any one of the aforementioned items [1] to [5], which is a double-sided adhesive sheet for a heat sink.
[7] The double-sided adhesive sheet according to any one of the aforementioned items [1] to [5], which is a double-sided adhesive sheet for a light-shielding tape.
Effects of the invention
The double-sided pressure-sensitive adhesive sheet of the present invention is a film, but has high adhesive strength, and is suppressed in increased adhesion to impart suitability for re-adhesion. Therefore, the double-sided adhesive sheet of the present invention can contribute to miniaturization of electronic devices, can firmly connect components when used for electronic components, and can be peeled from the components without being damaged when re-sticking is required.
Detailed Description
The present invention will be described in detail below, but the present invention is not limited to the description of the embodiment of the present invention.
The double-sided adhesive sheet is characterized in that the double-sided adhesive sheet has adhesive agent layers formed by adhesive agent compositions on two sides of a core material, the adhesive agent compositions comprise 100 parts by mass of (methyl) acrylic acid copolymer, 40-70 parts by mass of tackifying resin and 0.01-5 parts by mass of cross-linking agent, the thickness of the core material is 1-12 mu m, the thickness of the adhesive agent layers on two sides of the core material is 1-12 mu m respectively, and the following conditions (i) and (ii) are satisfied.
(i) And the adhesive surface of the adhesive layer is attached to a SUS plate, and the adhesive force A is 1000-1600 g/25mm measured after the SUS plate is placed in an environment of 25 ℃/50% RH for 20 minutes.
(ii) The adhesive surface of the adhesive layer was bonded to an SUS plate, and the adhesive force was measured after the SUS plate was left for 24 hours at 25 ℃/50% RH, and the value of adhesive force B/adhesive force A was 1.00 to 1.25, where B represents the measured adhesive force.
The following specifically describes the structure.
[ (meth) acrylic acid-based copolymer ]
The (meth) acrylic copolymer is a copolymer obtained by polymerizing a monomer having a (meth) acryloyl group such as (meth) acrylate and a monomer component copolymerizable therewith, in which at least one of the monomers constituting the copolymer is a monomer having a (meth) acryloyl group as a main component.
Examples of the monomer component for forming the (meth) acrylic copolymer include (meth) acrylic acid esters described later and crosslinkable group-containing monomers copolymerizable therewith.
In the present specification, "(meth) acrylic acid" means both of "acrylic acid" and "methacrylic acid", "meth (acrylate)" means both of "acrylate" and "methacrylate", and "(meth) acryloyl group" means both of "acryloyl group" and "methacryloyl group".
Examples of the (meth) acrylate include alkyl (meth) acrylate, alicyclic (meth) acrylate, aryl (meth) acrylate, aralkyl (meth) acrylate, alkoxyalkyl (meth) acrylate, alkoxypolyalkylene glycol mono (meth) acrylate, and aryloxyalkyl (meth) acrylate.
Examples of the alkyl (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, n-pentyl (meth) acrylate, n-hexyl (meth) acrylate, n-heptyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate, n-decyl (meth) acrylate, isodecyl (meth) acrylate, undecyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, and isostearyl (meth) acrylate.
Examples of the alicyclic (meth) acrylate include cyclic (meth) acrylates such as cyclohexyl (meth) acrylate and 4-t-butylcyclohexyl (meth) acrylate, isobornyl (meth) acrylate, and adamantyl (meth) acrylate.
Examples of the aryl (meth) acrylate include phenyl (meth) acrylate, and examples of the aralkyl (meth) acrylate include benzyl (meth) acrylate.
Examples of the alkoxyalkyl (meth) acrylate include methoxymethyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, 2-ethoxyethyl (meth) acrylate, 3-methoxypropyl (meth) acrylate, 3-ethoxypropyl (meth) acrylate, 4-methoxybutyl (meth) acrylate, and 4-ethoxybutyl (meth) acrylate.
Examples of the alkoxy polyalkylene glycol mono (meth) acrylate include methoxy diethylene glycol mono (meth) acrylate, methoxy dipropylene glycol mono (meth) acrylate, ethoxy triethylene glycol mono (meth) acrylate, ethoxy diethylene glycol mono (meth) acrylate, and methoxy triethylene glycol mono (meth) acrylate.
Examples of the aryloxyalkyl (meth) acrylate include phenoxymethyl (meth) acrylate, 2-phenoxyethyl (meth) acrylate, 2-tolyloxyethyl (meth) acrylate, ditolyloxymethyl (meth) acrylate, and naphthyloxymethyl (meth) acrylate.
One kind of the (meth) acrylate may be used alone, or two or more kinds may be used.
The amount of the (meth) acrylic acid ester used is preferably 65% by mass or more, more preferably 70% by mass or more, and still more preferably 75 to 99% by mass, based on 100% by mass of the monomer component for forming the (meth) acrylic copolymer. In such a manner, the pressure-sensitive adhesive layer is preferable from the viewpoint of the adhesive strength and suppression of the increase in adhesion of the pressure-sensitive adhesive layer to be obtained. Of 100% by mass of the (meth) acrylate, 60% by mass or more is preferably an alkyl (meth) acrylate.
Examples of the crosslinkable group-containing monomer include a carboxyl group-containing monomer and a hydroxyl group-containing monomer.
Examples of the carboxyl group-containing monomer include (meth) acrylic acid,. beta. -carboxyethyl (meth) acrylate,. beta. -carboxypentyl (meth) acrylate, crotonic acid, maleic acid, and fumaric acid.
Examples of the hydroxyl group-containing monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 3-chloro-2-hydroxypropyl (meth) acrylate, and 2-hydroxy-3-phenoxypropyl (meth) acrylate.
The crosslinkable group-containing monomer may be used alone in 1 kind or in 2 or more kinds.
The amount of the crosslinkable group-containing monomer used is preferably 0.1 to 15% by mass, more preferably 0.5 to 10% by mass, and still more preferably 1 to 8% by mass based on 100% by mass of the monomer component used for forming the (meth) acrylic copolymer. In such an embodiment, an appropriate crosslinked structure can be formed by the reaction of the (meth) acrylic copolymer with a crosslinking agent described later.
The monomer component may contain a monomer other than the (meth) acrylate and the crosslinkable group-containing monomer.
Examples of the other monomer include an amino group-containing monomer, an amide group-containing monomer, a glycidyl group-containing monomer, a vinyl group-containing monomer, and a polymerizable macromonomer.
Examples of the amino group-containing monomer include dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate; examples of the amide group-containing monomer include (meth) acrylamide, N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide; examples of the glycidyl group-containing monomer include glycidyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate glycidyl ether; examples of the vinyl group-containing monomer include vinyl acetate, ethylene, propylene, isobutylene, vinyl chloride, styrene, α -methylstyrene, butadiene, isoprene, and chloroprene.
Examples of the polymerizable macromonomer include a macromonomer in which a main chain constituting monomer is methyl methacrylate (product name: 45% AA-6(AA-6S), AA-6, available from Toyo Synthesis Co., Ltd.), a macromonomer in which a main chain constituting monomer is butyl acrylate (product name: AB-6 available from Toyo Synthesis Co., Ltd.), and a macromonomer in which a main chain is a styrene/acrylonitrile copolymer (product name: AN-6S available from Toyo Synthesis Co., Ltd.).
The other monomers may be used alone in 1 kind, or in 2 or more kinds.
The amount of the other monomer used is preferably 20% by mass or less, more preferably 15% by mass or less, and still more preferably 10% by mass or less, of 100% by mass of the monomer component for forming the (meth) acrylic copolymer.
The weight average molecular weight (Mw) of the (meth) acrylic copolymer measured by a Gel Permeation Chromatography (GPC) method is not particularly limited, but is preferably 10 to 150 ten thousand, more preferably 20 to 120 ten thousand, and further preferably 30 to 100 ten thousand.
The molecular weight distribution (Mw/Mn) of the (meth) acrylic copolymer is preferably 20 or less, more preferably 1.5 to 18, and still more preferably 1.8 to 15.
The glass transition temperature (Tg) of the (meth) acrylic copolymer is preferably less than 0 ℃, more preferably from-80 to-10 ℃, and still more preferably from-70 to-20 ℃. The Tg of the (meth) acrylic copolymer can be determined by the Fox formula, and the Tg of a homopolymer formed from each monomer in the Fox formula can be determined by a value described in the Fourth Edition of polymerization Handbook (Polymer Handbook Fourth Edition (Wiley-Interscience 2003)).
[ (production of meth) acrylic copolymer ]
The (meth) acrylic copolymer can be produced by copolymerizing the above monomer components, and may be any of a random copolymer, a block copolymer, and a graft copolymer. The (meth) acrylic copolymer can be produced by a conventionally known polymerization method such as a solution polymerization method, a bulk polymerization method, an emulsion polymerization method, or a suspension polymerization method, and among them, the solution polymerization method is preferable.
Specifically, in the solution polymerization method, a monomer component, a polymerization initiator, and other components such as a chain transfer agent and a polymerization solvent added as needed are charged into a reaction vessel, the reaction starting temperature is set to 40 to 100 ℃, and the reaction system is maintained at a temperature of 50 to 90 ℃ to perform a reaction for 2 to 20 hours. The reaction is carried out in an inert gas atmosphere such as nitrogen. In the polymerization reaction, at least 1 selected from the group consisting of a monomer component, a polymerization initiator, a chain transfer agent and a polymerization solvent may be additionally added.
Examples of the polymerization initiator include thermal polymerization initiators such as azo initiators and peroxide polymerization initiators.
Examples of the azo initiator include 2, 2 ' -azobisisobutyronitrile, 2 ' -azobis (4-methoxy-2, 4-dimethylvaleronitrile), 2 ' -azobis (2-cyclopropylpropionitrile), 2 ' -azobis (2, 4-dimethylvaleronitrile), 2 ' -azobis (2-methylbutyronitrile), 1 ' -azobis (cyclohexane-1-carbonitrile), 2- (carbamoylazo) isobutyronitrile, 2-phenylazo-4-methoxy-2, 4-dimethylvaleronitrile, 2 ' -azobis (2-amidinopropane) dihydrochloride, 2 ' -azobis (N, N ' -dimethyleneisobutylamidine), and, Azo compounds such as 2, 2 ' -azobis [ 2-methyl-N- (2-hydroxyethyl) -propionamide ], 2 ' -azobis (isobutylamide) dihydrate, 4 ' -azobis (4-cyanovaleric acid), 2 ' -azobis (2-cyanopropanol), and dimethyl 2, 2 ' -azobis (2-methylpropionate).
Examples of the peroxide-based polymerization initiator include t-butyl hydroperoxide, cumene hydroperoxide, dicumyl peroxide, benzoyl peroxide, lauroyl peroxide, hexanoyl peroxide, diisopropyl peroxy dicarbonate, di-2-ethylhexyl peroxy dicarbonate, t-butyl peroxy pivalate, 2-bis (4, 4-di-t-butylperoxycyclohexyl) propane, 2-bis (4, 4-di-t-amylperoxy cyclohexyl) propane, 2-bis (4, 4-di-t-octylperoxy cyclohexyl) propane, 2-bis (4, 4-di- α -cumyl peroxy cyclohexyl) propane, 2-bis (4, 4-di-t-butylperoxycyclohexyl) butane, 2, 2-bis (4, 4-di-tert-octylperoxy cyclohexyl) butane.
The polymerization initiator may be used alone in 1 kind, or may be used in 2 or more kinds.
In the production of the (meth) acrylic copolymer, the amount of the polymerization initiator used is usually 0.001 to 5 parts by mass, preferably 0.005 to 3 parts by mass, based on 100 parts by mass of the total of the monomer components.
Examples of the polymerization solvent include aromatic hydrocarbons such as benzene, toluene, and xylene; aliphatic hydrocarbons such as n-pentane, n-hexane, n-heptane, and n-octane; alicyclic hydrocarbons such as cyclopentane, cyclohexane, cycloheptane, and cyclooctane; ethers such as diethyl ether, diisopropyl ether, 1, 2-dimethoxyethane, dibutyl ether, tetrahydrofuran, dioxane, anisole, phenetole, and diphenyl ether; halogenated hydrocarbons such as chloroform, carbon tetrachloride, 1, 2-dichloroethane, chlorobenzene, and the like; esters such as ethyl acetate, propyl acetate, butyl acetate, and methyl propionate; ketones such as acetone, methyl ethyl ketone, diethyl ketone, methyl isobutyl ketone, and cyclohexanone; amides such as N, N-dimethylformamide, N-dimethylacetamide and N-methylpyrrolidone; nitriles such as acetonitrile and benzonitrile; sulfoxides such as dimethyl sulfoxide and sulfolane.
The polymerization solvent may be used alone in 1 kind, or may be used in 2 or more kinds.
[ tackifying resins ]
The adhesive composition used in the double-sided adhesive sheet of the present invention contains a tackifier resin. The tackifier resin is not particularly limited as long as it can impart adhesiveness to the adhesive composition. Examples of the tackifier resin include: a styrene-based tackifying resin, a rosin-based tackifying resin such as a rosin ester-based resin, a terpene-based tackifying resin such as a terpene phenol-based resin, and an alicyclic saturated hydrocarbon resin.
[ styrenic tackifying resins ]
The styrenic tackifier resin contained in the adhesive composition is not particularly limited. Examples of the styrenic tackifier resin include: styrene-based and substituted styrene-based petroleum resins.
Specific examples of the styrenic tackifier resins include FMR-0150, FTR-0100, FTR-2120, FTR-2140, FTR-6100, FTR-6110, FTR-6125, FTR-7100, FTR-8100 and FTR-8120. The above product was manufactured by Mitsui chemical corporation. Further, YS resin SX-100 (manufactured by YASUHARA CHEMICAL Co., Ltd.) can be mentioned.
[ rosin-based tackifying resins ]
The rosin-based tackifier resin contained in the adhesive composition is not particularly limited, and a rosin ester-based tackifier resin is generally used.
Specific examples of the rosin Ester resin include Superester A75, Superester A100, Superester A115, Superester A125, PINECRYSTAL KE-100, PINECRYSTAL KE-311, PINECRYSTAL KE-359, PINECRYSTAL KE-604, ESTer gum AT, ESTer gum H, ESTer gum HP, PENSEL D-125, PENSEL D-135, and PENSEL D-160. The above products are manufactured by Mitsukawa chemical industries, Ltd.
Examples thereof include HARIESTER TF, HARIESTER S, HARITACK8LJA, HARITACK ER95, HARITACK SE10, HARITACK PH, HARITACK F85, HARITACK F105, HARITACK FK100, and HARITACK PCJ. The above products are manufactured by Harlima chemical Co.
[ terpene-based tackifying resins ]
Examples of terpene-based tackifying resins include YS resin PX800, YS resin PX1000, YS resin PX1150, YS resin PX1250, YS Polystar U115, YS Polystar U130, YS Polystar UH115, YS Polystar T80, YS Polystar T100, YS Polystar T115, YS Polystar T130, YS Polystar T145, and YS Polystar T160. The above product was manufactured by Yasuhara chemical Co. Further, TAMANOL 803L, TAMANOL 901 (available from Okawa chemical Co., Ltd.) may be mentioned.
[ alicyclic saturated hydrocarbon resin ]
Examples of the alicyclic saturated hydrocarbon resin include ARKON P-90, ARKON P-100, ARKON P-115, ARKON P-125, ARKON P-135, ARKON M-90, ARKON M-100 and ARKON M-115. The above products are manufactured by Mitsukawa chemical industries, Ltd.
The tackifier resin may be used alone in 1 kind or 2 or more kinds, and preferably contains at least 1 kind of a styrene-based tackifier resin and a rosin-based tackifier resin, and more preferably a combination of a styrene-based tackifier resin and a rosin-based tackifier resin.
The adhesive composition of the present invention contains a tackifier resin in an amount of preferably 40 to 70 parts by mass, more preferably 45 to 65 parts by mass, based on 100 parts by mass of the (meth) acrylic copolymer. If the amount is 40 parts by mass or more, a predetermined adhesive layer strength is obtained, and thus physical properties such as adhesive force can be exhibited, and if the amount is 70 parts by mass or less, uniformity of the adhesive component is maintained. When a plurality of tackifier resins are used, the composition of the adhesive composition may be adjusted so that the total amount of the tackifier resins falls within the above range.
The content of the styrene-based tackifier resin when the styrene-based tackifier resin and the rosin-based tackifier resin are used in combination is not particularly limited, and is preferably 20 to 38 parts by mass, more preferably 23 to 35 parts by mass, and further preferably 27 to 35 parts by mass, based on 100 parts by mass of the (meth) acrylic copolymer. When the amount is 20 parts by mass or more, the parts can be prevented from being broken when re-attaching, and when the amount is 38 parts by mass or less, the styrene-based tackifier resin having poor compatibility can be uniformly dissolved in the pressure-sensitive adhesive composition, and the pressure-sensitive adhesive layer formed from the obtained pressure-sensitive adhesive composition can be prevented from being blurred.
The content of the rosin-based tackifying resin is not particularly limited, and is preferably 18 to 32 parts by mass, more preferably 20 to 30 parts by mass, and still more preferably 26 to 30 parts by mass, based on 100 parts by mass of the (meth) acrylic copolymer. If the amount is 18 parts by mass or more, the adhesiveness can be strong, and if the amount is 32 parts by mass or less, the part breakage at the time of re-attachment can be suppressed.
Further, the content of the styrene-based tackifier resin relative to the content of the rosin-based binder resin is not particularly limited, and the content of the styrene-based tackifier resin is preferably larger than the content of the rosin-based tackifier resin. When the amount of the styrenic tackifier resin is larger than that of the rosin tackifier resin, the relationship between the adhesive force B and the adhesive force A described below is easily maintained while the strong adhesive force is easily maintained.
[ crosslinking agent ]
The crosslinking agent contained in the pressure-sensitive adhesive composition is reactive with the crosslinkable group of the (meth) acrylic copolymer.
Examples of the crosslinking agent include isocyanate compounds, epoxy compounds, and metal chelate compounds.
The isocyanate compound is generally an isocyanate compound having 2 or more isocyanate groups in 1 molecule, preferably 2 to 8, more preferably 3 to 6. From the viewpoint of the efficiency of the crosslinking reaction between the (meth) acrylic copolymer and the isocyanate compound and the viewpoint of maintaining the flexibility of the pressure-sensitive adhesive layer, the number of isocyanate groups is preferably in the above range.
Examples of the diisocyanate compound having 2 isocyanate groups in 1 molecule include aliphatic diisocyanates, alicyclic diisocyanates, and aromatic diisocyanates. Examples of the aliphatic diisocyanate include aliphatic diisocyanates having 4 to 30 carbon atoms such as ethylene diisocyanate, tetramethylene diisocyanate, pentamethylene diisocyanate, hexamethylene diisocyanate, 2-methyl-1, 5-pentane diisocyanate, 3-methyl-1, 5-pentane diisocyanate, and 2, 2, 4-trimethyl-1, 6-hexamethylene diisocyanate. Examples of the alicyclic diisocyanate include alicyclic diisocyanates having 7 to 30 carbon atoms such as isophorone diisocyanate, cyclopentyl diisocyanate, cyclohexyl diisocyanate, hydrogenated xylylene diisocyanate, hydrogenated toluene diisocyanate, hydrogenated diphenylmethane diisocyanate, and hydrogenated tetramethylxylene diisocyanate. Examples of the aromatic diisocyanate include aromatic diisocyanates having 8 to 30 carbon atoms such as phenylene diisocyanate, toluene diisocyanate, xylylene diisocyanate, naphthalene diisocyanate, diphenyl ether diisocyanate, diphenylmethane diisocyanate, and diphenylpropane diisocyanate.
Examples of the isocyanate compound having 3 or more isocyanate groups in 1 molecule include aromatic polyisocyanates, aliphatic polyisocyanates, and alicyclic polyisocyanates. Specific examples thereof include 2, 4, 6-triisocyanate toluene, 1, 3, 5-triisocyanate benzene, and 4, 4', 4 ″ -triphenylmethane triisocyanate.
Examples of the isocyanate compound include a polymer (for example, a 2-or 3-mer, a biuret or an isocyanurate) of the above isocyanate compound having an isocyanate number of 2 or more, a derivative (for example, an addition reaction product of a polyol and a diisocyanate compound having 2 or more molecules), and a polymer. Examples of the polyhydric alcohol in the above derivatives include low molecular weight polyhydric alcohols such as 3 or more-membered alcohols including trimethylolpropane, glycerol, pentaerythritol, and the like; examples of the high molecular weight polyol include polyether polyol, polyester polyol, acrylic polyol, polybutadiene polyol and polyisoprene polyol.
Examples of such isocyanate compounds include 3-mer of diphenylmethane diisocyanate, polymethylene polyphenyl polyisocyanate, biuret or isocyanurate of hexamethylene diisocyanate or tolylene diisocyanate, a reaction product of trimethylolpropane and tolylene diisocyanate or xylylene diisocyanate (for example, 3-molecule adduct of tolylene diisocyanate or xylylene diisocyanate), a reaction product of trimethylolpropane and hexamethylene diisocyanate (for example, 3-molecule adduct of hexamethylene diisocyanate), polyether polyisocyanate, and polyester polyisocyanate.
Among the isocyanate compounds, xylylene diisocyanate and hexamethylene diisocyanate are preferable from the viewpoint of resistance to yellowing, and toluene diisocyanate is preferable from the viewpoint of stress relaxation. Examples of the xylylene diisocyanate-based crosslinking agent include xylylene diisocyanate and its multimers or derivatives, and polymers; examples of the hexamethylene diisocyanate-based crosslinking agent include hexamethylene diisocyanate, and polymers, derivatives, and polymers thereof; examples of the toluene diisocyanate-based crosslinking agent include toluene diisocyanate, and polymers, derivatives, and polymers thereof.
Examples of the epoxy compound include compounds having 2 or more epoxy groups in the molecule, for example, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerol triglycidyl ether, 1, 6-hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, diglycidylaniline, N' -tetraglycidyl-m-xylylenediamine, 1, 3-bis (N, N-diglycidylaminomethyl) cyclohexane, and 1, 3-bis (N, N-diglycidylaminomethyl) benzene.
Examples of the metal chelate compound include compounds obtained by coordinating a polyvalent metal such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium, or zirconium with an alkoxide, acetylacetone, or ethyl acetoacetate. Specific examples thereof include aluminum isopropoxide, aluminum sec-butoxide, ethyl aluminum diisopropyl acetoacetate, tris (ethyl acetoacetato) aluminum, and triacetyl aluminum acetonate.
The crosslinking agent can be used alone in 1, also can be used more than 2.
In the adhesive composition of the present invention, the crosslinking agent is contained preferably in an amount of 0.01 to 5 parts by mass, more preferably 0.05 to 3 parts by mass, and still more preferably 1 to 2.5 parts by mass, based on 100 parts by mass of the (meth) acrylic copolymer. If this is the case, excellent adhesive characteristics can be achieved.
[ additives ]
The adhesive composition used in the double-sided adhesive sheet of the present invention may contain various additives such as a silane coupling agent, an organopolysiloxane compound, a pigment, a flame retardant, a plasticizer, an antistatic agent, a lubricant, and a filler. The content of the additive is not particularly limited, but should be set to a content within a range that does not impair the characteristics of the double-sided adhesive sheet and the adhesive composition used in the double-sided adhesive sheet of the invention.
[ organic solvent ]
The pressure-sensitive adhesive composition used in the double-sided pressure-sensitive adhesive sheet of the present invention may contain an organic solvent for adjusting the coatability. Examples of the organic solvent include the polymerization solvents described in the section of the production conditions of the (meth) acrylic copolymer. The content of the organic solvent in the binder composition is usually 30 to 90% by mass, preferably 40 to 90% by mass.
[ adhesive composition ]
The adhesive composition used in the double-sided adhesive sheet of the present invention can be prepared by mixing 40 to 65 parts by mass of a tackifier resin and 0.01 to 5 parts by mass of a crosslinking agent with respect to 100 parts by mass of a (meth) acrylic copolymer. In addition, the adhesive composition may contain other components.
[ double-sided adhesive sheet ]
The double-sided adhesive sheet of the present invention comprises a core material and adhesive layers (a first adhesive layer and a second adhesive layer) formed on both sides of the core material. Therefore, the double-sided adhesive sheet of the present invention has a structure of at least three layers. Further, a release film may be attached to the surface of the pressure-sensitive adhesive layer not in contact with the core material.
[ core Material ]
The double-sided adhesive sheet of the present invention comprises a core material. The core material used in the double-sided adhesive sheet of the present invention has a thickness of 1 to 12 μm. When the thickness is 1 μm or more, an appropriate sheet strength can be obtained, and when the thickness is 12 μm or less, the increase in adhesion can be suppressed.
Examples of the core material and the release film include plastic films such as Polycarbonate (PC), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), Polyethylene (PE), polypropylene (PP), ethylene-propylene copolymer, ethylene-vinyl acetate copolymer, acrylonitrile-butadiene-styrene copolymer (ABS), polyamide (nylon), polyimide, and polyvinyl chloride (PVC). Further, as the core material, glass, paper, nonwoven fabric, and the like can be cited. In addition, the core material is preferably PET from the viewpoint of strength and easy handling.
When the double-sided adhesive sheet of the present invention is used as a light-shielding tape, a core material containing a black color material such as a black pigment or a white color material such as a white pigment dispersed therein can be used.
[ adhesive layer ]
The adhesive layers disposed on both sides of the core material may be formed of an adhesive composition. The adhesive layers on both sides of the core material may be the same or different.
1 adhesive layer has a thickness of 1 to 12 μm. If the thickness is 1 μm or more, a double-sided pressure-sensitive adhesive sheet having an appropriate adhesive strength can be obtained, and if the thickness is 12 μm or less, increase in adhesion can be suppressed.
The gel fraction of the pressure-sensitive adhesive layer is preferably 10 to 98 mass%, more preferably 20 to 90 mass%, and still more preferably 30 to 85 mass%, from the viewpoint of the cohesive strength, the adhesive strength described later, and the suitability for re-application.
[ adhesive force A ]
The double-sided adhesive sheet of the present invention has the following features: the adhesive surface of the adhesive layer is stuck to an SUS plate, and the adhesive force A measured after the SUS plate is placed in an environment of 25 ℃/50% RH for 20 minutes is 1000-1600 g/25 mm. By having such a feature, it is shown that the double-sided pressure-sensitive adhesive sheet has a strong initial adhesive force. The details of the measurement conditions are described in examples.
[ adhesive force B/adhesive force A ]
The double-sided adhesive sheet of the present invention has the following features: when the adhesive force measured after the adhesive surface of the adhesive layer was stuck to an SUS plate and left to stand in an environment of 25 ℃/50% RH for 24 hours was taken as B, the ratio of the adhesive force B to the adhesive force a (adhesive force B/adhesive force a) was 1.00 to 1.25. The conditions for measuring the adhesive force B are described in examples.
The adhesive force B is an adhesive force measured after being left for 24 hours after the attachment, and therefore is generally higher than the adhesive force a. However, since the double-sided adhesive sheet of the present invention has an adhesive force B/adhesive force a of 1.00 or more and 1.25 or less, the increase rate of the adhesive force is not high, and the increase in adhesion can be suppressed. That is, the double-sided adhesive sheet of the present invention has high re-application characteristics, and can suppress the breakage of parts due to re-application.
[ use ]
The double-sided pressure-sensitive adhesive sheet of the present invention is a film as described above, has a strong adhesive force, suppresses sticking and imparts suitability for re-sticking, and can be used for various applications. For example, a heat sink or a light-shielding tape can be attached to an object using the double-sided adhesive sheet of the present invention. The heat sink and the light shielding tape will be described below.
Radiating fin
By providing the heat sink in a local high-temperature portion, heat can be radiated to the entire surface of the OA equipment or the electronic equipment. Examples of the graphite sheet used for the heat radiating sheet include natural graphite sheets obtained by flaking natural graphite powder, artificial graphite sheets obtained by heat-treating polymer films, and the like.
Examples of the polymer thin film include thin films formed of polyimide, polyamide, polyoxadiazole, polybenzothiazole, polybenzoxazole, polybenzobisoxazole, polyparaphenylene vinylene, polybenzimidazole, polybenzobisoxazole, polythiazole, and the like.
The thickness of the graphite sheet is preferably 10 to 100 μm, and more preferably 15 to 50 μm. By setting the thickness of the graphite sheet to the above range, it is possible to apply to fixing of parts of OA equipment or electronic equipment.
Shading tape
The light-shielding tape is used for attaching a non-self-luminous display unit such as a liquid crystal display module unit to a backlight unit, thereby preventing problems due to light leakage.
[ method for producing double-sided adhesive sheet ]
The double-sided adhesive sheet of the present invention can be produced as follows.
The adhesive composition is applied to one surface of the release film so that the thickness of the release film after drying is 1 to 12 μm, and the release film is dried at 60 to 100 ℃ for 1 to 10 minutes, and the solvent is removed. Then, the obtained adhesive layer is bonded to one surface (a first surface of the core material) of the core material having a thickness of 1 to 12 μm.
Then, the adhesive composition is coated on one surface of the other release film so that the thickness after drying is 1 to 12 μm. Then, the adhesive layer is dried at 60 to 100 ℃ for 1 to 10 minutes and the solvent is removed, and the obtained adhesive layer is bonded to the side of the core material to which the adhesive layer is not bonded (which is the second surface of the core material), thereby producing a double-sided adhesive sheet.
The coating method is not particularly limited, and conventionally known methods can be used. Examples of the method for applying the adhesive composition include a method using a roll coater, a fountain coater, a lip coater, a knife coater, a die coater, a gravure coater, a reverse coater, a curtain coater, a slit die coater, and the like.
The pressure-sensitive adhesive layer formed on the first surface and the pressure-sensitive adhesive layer formed on the second surface may be the same or different.
Examples
The following examples are illustrative, but the present invention is not limited to the examples.
Production example preparation of adhesive composition
To a reaction apparatus equipped with a stirrer, a reflux condenser, a thermometer and a nitrogen inlet tube, 97 parts by mass of n-BA (n-butyl acrylate), 2 parts by mass of AA (acrylic acid), 1 part by mass of 2HEA (2-hydroxyethyl acrylate) and 80 parts by mass of ethyl acetate were charged, and the temperature was raised to 75 ℃ while introducing nitrogen. Next, 0.3 parts by mass of azobisisobutyronitrile was added, and the reaction was carried out for 4 hours while repeating heating and cooling so that the temperature of the content in the flask could be maintained at 75 to 76 ℃. After the reaction was completed, 20 parts by mass of ethyl acetate was further added to obtain a (meth) acrylic copolymer having a weight average molecular weight (Mw) of 85 ten thousand.
An adhesive composition was obtained by mixing 35 parts by mass of a styrene-based tackifier resin (FTR-6100, manufactured by Mitsui chemical Co., Ltd.), 30 parts by mass of a rosin-based tackifier resin (D-135, manufactured by Mitsui chemical Co., Ltd.), and 1.5 parts by mass of an isocyanate-based crosslinking agent (L-45, manufactured by Suzuki Kagaku K.K.) (solid content) with respect to 100 parts by mass of the solid content of the (meth) acrylic copolymer.
Example 1 double-sided adhesive sheet and production thereof
The adhesive composition was applied to a release film so that the thickness after drying was 5 μm, and the film was dried at 90 ℃ for 3 minutes and bonded to a PET film (core material) having a thickness of 2 μm (to form a first surface adhesive layer). Further, a pressure-sensitive adhesive layer-attached sheet obtained by applying the pressure-sensitive adhesive composition to a release film so that the thickness after drying is 5 μm and drying at 90 ℃ for 3 minutes was attached to the side of the PET film to which the first-side pressure-sensitive adhesive layer was not attached (a second-side pressure-sensitive adhesive layer was formed), to prepare a double-sided pressure-sensitive adhesive sheet (example 1).
(examples 2 to 6 and comparative examples 1 to 3)
Various double-sided adhesive sheets (examples 2 to 6 and comparative examples 1 to 3) were obtained in the same manner as in example 1, except that the amount of tackifier resin used and the thicknesses of the core material and the adhesive layer were changed as shown in table 1.
TABLE 1
< measurement and evaluation >
The conditions for measuring the weight average molecular weight, the adhesive force a and the adhesive force B of the (meth) acrylic copolymer used in examples 1 to 6 and comparative examples 1 to 3 are as follows.
(weight average molecular weight (Mw))
The weight average molecular weight (Mw) of the (meth) acrylic copolymer was determined by Gel Permeation Chromatography (GPC) under the following conditions in terms of standard polystyrene.
A measurement device: HLC-8120GPC (manufactured by Tosoh corporation)
GPC column composition: the following 5-column chromatography (all made by Tosoh corporation)
(1) TSK-GEL HXL-H (guard column)
(2)TSK-GEL G7000HXL
(3)TSK-GEL GMHXL
(4)TSK-GEL GMHXL
(5)TSK-GEL G2500HXL
Sample concentration: diluting with tetrahydrofuran to 1.0mg/cm3
Mobile phase solvent: tetrahydrofuran (THF)
Flow rate: 1.0cm3/min
Column temperature: 40 deg.C
(adhesive force A and adhesive force B)
The release film on the first pressure-sensitive adhesive layer side of the double-sided pressure-sensitive adhesive sheets obtained in examples and comparative examples was peeled off, and the entire exposed pressure-sensitive adhesive layer was bonded to a PET film having a thickness of 50 μm, and cut into 25mm × 150mm to prepare test pieces. Next, the release film on the second pressure-sensitive adhesive layer side was peeled off, the exposed pressure-sensitive adhesive layer was bonded to a SUS plate, and the pressure-sensitive adhesive layer was pressure-bonded by reciprocating a roller weighing 2kg 3 times. After the pressure bonding, the test piece was left to stand at 25 ℃/50% RH for 20 minutes, and then the end of the test piece was pulled at a speed of 300mm/min in a 180 ℃ direction with respect to the PET film surface to measure the adhesive force A.
The adhesive force B was measured in the same manner as the adhesive force a except that the sheet was left to stand at 25 ℃/50% RH for 24 hours after the pressure bonding.
The double-sided adhesive sheets of the examples were all thin films, had high initial adhesion, suppressed increase in adhesion, and exhibited good suitability for re-application. The double-sided pressure-sensitive adhesive sheets of comparative example 1 and comparative example 2, in which the amount of the tackifier resin used was less than 40 parts by mass, and the core material thickness exceeded 12 μm, had low initial adhesive strength, and the double-sided pressure-sensitive adhesive sheet of comparative example 3, in which the adhesive layer thickness exceeded 12 μm, did not suppress the increase in adhesion.
Claims (5)
1. A double-sided adhesive sheet comprising a core material and, superimposed on each of both sides thereof, an adhesive layer formed from an adhesive composition comprising 100 parts by mass of a (meth) acrylic copolymer, 23 to 35 parts by mass of a styrene-based tackifier resin, 18 to 32 parts by mass of a rosin-based tackifier resin, and 0.01 to 5 parts by mass of a crosslinking agent, wherein the core material has a thickness of 1 to 12 μm, and the adhesive layers superimposed on both sides of the core material have a thickness of 1 to 12 μm, respectively, and satisfy the following conditions (i) and (ii):
(i) attaching the adhesive surface of the adhesive layer to a SUS plate, and measuring the adhesive force A to be 1000-1600 g/25mm after the SUS plate is placed in an environment of 25 ℃/50% RH for 20 minutes;
(ii) the adhesive surface of the adhesive layer was bonded to an SUS plate, and the adhesive force was measured after the SUS plate was left for 24 hours at 25 ℃/50% RH, and the value of adhesive force B/adhesive force A was 1.00 to 1.25, where B represents the measured adhesive force.
2. The double-sided adhesive sheet according to claim 1, wherein the content of the styrene-based tackifier resin is larger than the content of the rosin-based tackifier resin.
3. The double-sided adhesive sheet according to claim 1, wherein the styrene-based tackifier resin is contained in an amount of 27 to 35 parts by mass, and the rosin-based tackifier resin is contained in an amount of 26 to 30 parts by mass.
4. A double-sided adhesive sheet according to any one of claims 1 to 3, which is a double-sided adhesive sheet for a heat sink.
5. A double-sided adhesive sheet according to any one of claims 1 to 3, which is a double-sided adhesive sheet for a light-shielding tape.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2018034425 | 2018-02-28 | ||
| JP2018-034425 | 2018-02-28 | ||
| PCT/JP2019/005981 WO2019167712A1 (en) | 2018-02-28 | 2019-02-19 | Double-sided pressure-sensitive adhesive sheet and use thereof |
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| CN111742022B true CN111742022B (en) | 2022-04-12 |
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| JP (1) | JP7390281B2 (en) |
| KR (1) | KR102584998B1 (en) |
| CN (1) | CN111742022B (en) |
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| JP5556987B2 (en) | 2009-04-09 | 2014-07-23 | Ｄｉｃ株式会社 | Double-sided adhesive tape |
| JP2011162586A (en) * | 2010-02-04 | 2011-08-25 | Sekisui Chem Co Ltd | Double-sided adhesive sheet |
| JP5760574B2 (en) | 2011-03-24 | 2015-08-12 | Dic株式会社 | Colored adhesive tape |
| JP6050686B2 (en) * | 2012-01-26 | 2016-12-21 | 日東電工株式会社 | Double-sided adhesive sheet |
| TWI468485B (en) | 2012-05-21 | 2015-01-11 | Dainippon Ink & Chemicals | Adhesive tape |
| TW201402763A (en) * | 2012-06-21 | 2014-01-16 | Dainippon Ink & Chemicals | Adhesive tape |
| JP5700178B2 (en) * | 2013-03-25 | 2015-04-15 | Dic株式会社 | Adhesive tape and electronic equipment |
| JP6317591B2 (en) | 2014-02-06 | 2018-04-25 | 日東電工株式会社 | Double-sided pressure-sensitive adhesive sheet and method for producing the same |
| WO2015151223A1 (en) * | 2014-03-31 | 2015-10-08 | リンテック株式会社 | Double-sided adhesive sheet and double-sided adhesive sheet manufacturing method |
| JP6325313B2 (en) * | 2014-03-31 | 2018-05-16 | リンテック株式会社 | Sheet adhesive and adhesive sheet |
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- 2019-02-13 TW TW108104757A patent/TWI801499B/en active
- 2019-02-19 WO PCT/JP2019/005981 patent/WO2019167712A1/en active Application Filing
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| JP2010195971A (en) * | 2009-02-26 | 2010-09-09 | Daio Paper Corp | Self-adhesive sheet |
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| TWI801499B (en) | 2023-05-11 |
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| JPWO2019167712A1 (en) | 2021-02-12 |
| WO2019167712A1 (en) | 2019-09-06 |
| JP7390281B2 (en) | 2023-12-01 |
| KR20200125652A (en) | 2020-11-04 |
| TW201936841A (en) | 2019-09-16 |
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