WO2015080244A1 - (メタ)アクリル系共重合体、それを含む粘着剤組成物および粘着シート - Google Patents
(メタ)アクリル系共重合体、それを含む粘着剤組成物および粘着シート Download PDFInfo
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- WO2015080244A1 WO2015080244A1 PCT/JP2014/081523 JP2014081523W WO2015080244A1 WO 2015080244 A1 WO2015080244 A1 WO 2015080244A1 JP 2014081523 W JP2014081523 W JP 2014081523W WO 2015080244 A1 WO2015080244 A1 WO 2015080244A1
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- WIPO (PCT)
- Prior art keywords
- meth
- group
- macromonomer
- acrylic copolymer
- acrylate
- Prior art date
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- 229920006243 acrylic copolymer Polymers 0.000 title claims abstract description 44
- 239000000203 mixture Substances 0.000 title claims abstract description 40
- 230000001070 adhesive effect Effects 0.000 title abstract description 30
- 239000000853 adhesive Substances 0.000 title abstract description 29
- 239000000178 monomer Substances 0.000 claims abstract description 47
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 20
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 19
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 5
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 26
- 230000009477 glass transition Effects 0.000 claims description 12
- 125000000217 alkyl group Chemical group 0.000 claims description 11
- 125000003118 aryl group Chemical group 0.000 claims description 11
- 125000000753 cycloalkyl group Chemical group 0.000 claims description 9
- 125000001424 substituent group Chemical group 0.000 claims description 9
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 8
- 125000000623 heterocyclic group Chemical group 0.000 claims description 7
- 239000000155 melt Substances 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 5
- 238000000576 coating method Methods 0.000 abstract description 11
- 239000011248 coating agent Substances 0.000 abstract description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 46
- -1 monomethylamino group Chemical group 0.000 description 31
- 238000000034 method Methods 0.000 description 18
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 15
- 229920001577 copolymer Polymers 0.000 description 13
- 239000000843 powder Substances 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- 229920000642 polymer Polymers 0.000 description 10
- 239000000047 product Substances 0.000 description 9
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 8
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- 125000004432 carbon atom Chemical group C* 0.000 description 8
- 239000003431 cross linking reagent Substances 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 8
- 239000002904 solvent Substances 0.000 description 8
- 239000012986 chain transfer agent Substances 0.000 description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 6
- 235000019439 ethyl acetate Nutrition 0.000 description 6
- 125000000524 functional group Chemical group 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 5
- 239000003963 antioxidant agent Substances 0.000 description 5
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011521 glass Substances 0.000 description 5
- 239000012943 hotmelt Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 5
- 229920001228 polyisocyanate Polymers 0.000 description 5
- 239000005056 polyisocyanate Substances 0.000 description 5
- 239000011342 resin composition Substances 0.000 description 5
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 5
- 229920002818 (Hydroxyethyl)methacrylate Polymers 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 4
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical compound CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 description 4
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 4
- 229920006223 adhesive resin Polymers 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001723 curing Methods 0.000 description 4
- 125000004386 diacrylate group Chemical group 0.000 description 4
- 239000002270 dispersing agent Substances 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 238000005227 gel permeation chromatography Methods 0.000 description 4
- 239000003999 initiator Substances 0.000 description 4
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 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 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 230000003078 antioxidant effect Effects 0.000 description 3
- 239000007900 aqueous suspension Substances 0.000 description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 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 3
- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
- 229920001223 polyethylene glycol Polymers 0.000 description 3
- 239000003505 polymerization initiator Substances 0.000 description 3
- 229920001451 polypropylene glycol Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-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
- INQDDHNZXOAFFD-UHFFFAOYSA-N 2-[2-(2-prop-2-enoyloxyethoxy)ethoxy]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOCCOC(=O)C=C INQDDHNZXOAFFD-UHFFFAOYSA-N 0.000 description 2
- FDSUVTROAWLVJA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OC(=O)C=C.OCC(CO)(CO)COCC(CO)(CO)CO FDSUVTROAWLVJA-UHFFFAOYSA-N 0.000 description 2
- 229920002799 BoPET Polymers 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- IAXXETNIOYFMLW-GYSYKLTISA-N [(1r,3r,4r)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@@]2(C)[C@H](OC(=O)C(=C)C)C[C@@H]1C2(C)C IAXXETNIOYFMLW-GYSYKLTISA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 125000005073 adamantyl group Chemical group C12(CC3CC(CC(C1)C3)C2)* 0.000 description 2
- 150000001447 alkali salts Chemical class 0.000 description 2
- 125000004453 alkoxycarbonyl 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
- 239000002585 base Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 2
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 description 2
- 238000012674 dispersion polymerization Methods 0.000 description 2
- 239000003480 eluent Substances 0.000 description 2
- 238000010556 emulsion polymerization method Methods 0.000 description 2
- 125000003700 epoxy group Chemical group 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 150000002894 organic compounds Chemical group 0.000 description 2
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000000016 photochemical curing Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000010558 suspension polymerization method Methods 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical group O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 2
- QNODIIQQMGDSEF-UHFFFAOYSA-N (1-hydroxycyclohexyl)-phenylmethanone Chemical compound C=1C=CC=CC=1C(=O)C1(O)CCCCC1 QNODIIQQMGDSEF-UHFFFAOYSA-N 0.000 description 1
- MYWOJODOMFBVCB-UHFFFAOYSA-N 1,2,6-trimethylphenanthrene Chemical compound CC1=CC=C2C3=CC(C)=CC=C3C=CC2=C1C MYWOJODOMFBVCB-UHFFFAOYSA-N 0.000 description 1
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-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
- DAVVKEZTUOGEAK-UHFFFAOYSA-N 2-(2-methoxyethoxy)ethyl 2-methylprop-2-enoate Chemical compound COCCOCCOC(=O)C(C)=C DAVVKEZTUOGEAK-UHFFFAOYSA-N 0.000 description 1
- OBETXYAYXDNJHR-UHFFFAOYSA-N 2-Ethylhexanoic acid Chemical compound CCCCC(CC)C(O)=O OBETXYAYXDNJHR-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
- TXHZNLCKXHJYNX-UHFFFAOYSA-N 2-[2-[2-[2-[2-[2-[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound COCCOCCOCCOCCOCCOCCOCCOCCOCCOC(=O)C(C)=C TXHZNLCKXHJYNX-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
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 1
- OVEUFHOBGCSKSH-UHFFFAOYSA-N 2-methyl-n,n-bis(oxiran-2-ylmethyl)aniline Chemical compound CC1=CC=CC=C1N(CC1OC1)CC1OC1 OVEUFHOBGCSKSH-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- BESKSSIEODQWBP-UHFFFAOYSA-N 3-tris(trimethylsilyloxy)silylpropyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCC[Si](O[Si](C)(C)C)(O[Si](C)(C)C)O[Si](C)(C)C BESKSSIEODQWBP-UHFFFAOYSA-N 0.000 description 1
- 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 1
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical group O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 1
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- DXPPIEDUBFUSEZ-UHFFFAOYSA-N 6-methylheptyl prop-2-enoate Chemical compound CC(C)CCCCCOC(=O)C=C DXPPIEDUBFUSEZ-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 1
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- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
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- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- ROSDSFDQCJNGOL-UHFFFAOYSA-N Dimethylamine Chemical group CNC ROSDSFDQCJNGOL-UHFFFAOYSA-N 0.000 description 1
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- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 101000720524 Gordonia sp. (strain TY-5) Acetone monooxygenase (methyl acetate-forming) Proteins 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- AVXURJPOCDRRFD-UHFFFAOYSA-N Hydroxylamine Chemical compound ON AVXURJPOCDRRFD-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 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 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical group CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
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- JAYXSROKFZAHRQ-UHFFFAOYSA-N n,n-bis(oxiran-2-ylmethyl)aniline Chemical compound C1OC1CN(C=1C=CC=CC=1)CC1CO1 JAYXSROKFZAHRQ-UHFFFAOYSA-N 0.000 description 1
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- 125000001400 nonyl 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])[H] 0.000 description 1
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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- 125000000913 palmityl 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])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 150000003077 polyols Chemical class 0.000 description 1
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- LLLCSBYSPJHDJX-UHFFFAOYSA-M potassium;2-methylprop-2-enoate Chemical compound [K+].CC(=C)C([O-])=O LLLCSBYSPJHDJX-UHFFFAOYSA-M 0.000 description 1
- FZYCEURIEDTWNS-UHFFFAOYSA-N prop-1-en-2-ylbenzene Chemical compound CC(=C)C1=CC=CC=C1.CC(=C)C1=CC=CC=C1 FZYCEURIEDTWNS-UHFFFAOYSA-N 0.000 description 1
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- 235000011152 sodium sulphate Nutrition 0.000 description 1
- DEWNCLAWVNEDHG-UHFFFAOYSA-M sodium;2-(2-methylprop-2-enoyloxy)ethanesulfonate Chemical compound [Na+].CC(=C)C(=O)OCCS([O-])(=O)=O DEWNCLAWVNEDHG-UHFFFAOYSA-M 0.000 description 1
- 125000004079 stearyl 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])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
- 125000004962 sulfoxyl group Chemical group 0.000 description 1
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- 239000000454 talc Substances 0.000 description 1
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- 235000007586 terpenes Nutrition 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 239000011135 tin Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 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 1
- 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 description 1
- 238000012546 transfer Methods 0.000 description 1
- 125000002889 tridecyl 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])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 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
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/04—Polymers provided for in subclasses C08C or C08F
- C08F290/046—Polymers of unsaturated carboxylic acids or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
-
- 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
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/10—Homopolymers or copolymers of methacrylic acid 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
- C09J151/00—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J151/003—Adhesives based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
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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
- C09J155/00—Adhesives based on homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C09J123/00 - C09J153/00
- C09J155/005—Homopolymers or copolymers obtained by polymerisation of macromolecular compounds terminated by a carbon-to-carbon double bond
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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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F222/00—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 a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides, or nitriles thereof
- C08F222/10—Esters
- C08F222/1006—Esters of polyhydric alcohols or polyhydric phenols
- C08F222/103—Esters of polyhydric alcohols or polyhydric phenols of trialcohols, e.g. trimethylolpropane tri(meth)acrylate
Definitions
- the present invention relates to a (meth) acrylic copolymer copolymerized with a macromonomer, a pressure-sensitive adhesive composition containing the same, and a pressure-sensitive adhesive sheet.
- a macromonomer is a high molecular weight monomer having a polymerizable functional group.
- a copolymer obtained by copolymerizing a macromonomer has a characteristic that individual characteristics can be expressed without impairing the characteristics of the macromonomer portion and the monomer unit copolymerized with the macromonomer. Therefore, for example, various copolymers using this type of macromonomer have also been proposed in the field of adhesives.
- Patent Document 1 discloses that a macromonomer having a number average molecular weight of 2000 g / mol to 50,000 g / mol and an ethylenically unsaturated monomer are copolymerized to be dispersed in an aqueous medium having a specific solid content.
- An adhesive composition comprising a copolymer is disclosed.
- Patent Document 2 discloses an adhesive resin composition obtained by copolymerizing an alkyl (meth) acrylate monomer and a macromonomer having a number average molecular weight of 1000 to 200,000 and a glass transition temperature of 30 to 150 ° C. It is disclosed.
- the present invention provides a weight average molecular weight of 50,000 to 1,000,000 obtained by polymerizing a monomer mixture containing a macromonomer (a) having a number average molecular weight of 500 or more and less than 6000 and a vinyl monomer (b). It relates to a certain (meth) acrylic copolymer (A). Moreover, this invention relates to the adhesive composition containing this (meth) acrylic-type copolymer (A). Furthermore, this invention relates to the adhesive sheet using this adhesive composition.
- the (meth) acrylic copolymer (A) of the present invention has the characteristics of the macromonomer portion and the monomer unit copolymerized with the macromonomer, the (meth) acrylic copolymer (A)
- the pressure-sensitive adhesive composition used can be applied by various coating methods, for example, a hot melt method in which a resin composition is heated and applied as it is, or a solution coating method in which a solvent is added and then applied. .
- the obtained adhesive has sufficient adhesive force and holding power.
- a macromonomer generally means a polymer compound having a polymerizable group introduced at the end of a polymer.
- the number average molecular weight of the macromonomer (a) in the present invention is 500 or more and less than 6000.
- the number average molecular weight is preferably from 800 to 5500, more preferably from 1000 to 4500, in view of the balance between adhesive force and coating property.
- the monomer constituting the macromonomer Various monomers are used as the monomer constituting the macromonomer.
- the monomer having a structure represented by the following formula (1) in which a polymerizable group is introduced at the terminal of the poly (meth) acrylate segment is used.
- (meth) acrylic acid means “acrylic acid” or “methacrylic acid”.
- R and R 1 to R n are each independently a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group, or a heterocyclic group.
- the alkyl group, cycloalkyl group, aryl group or heterocyclic group can have a substituent.
- alkyl group for R or R 1 to R n examples include a branched or straight chain alkyl group having 1 to 20 carbon atoms.
- Specific examples of the branched or straight chain alkyl group having 1 to 20 carbon atoms include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, t-butyl group, i-butyl group, and pentyl.
- methyl, ethyl, n-propyl, i-propyl, n-butyl, t-butyl, pentyl, hexyl, heptyl and octyl groups are preferred because of their availability.
- a methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group and t-butyl group are more preferable.
- Examples of the cycloalkyl group represented by R or R 1 to R n include cycloalkyl groups having 3 to 20 carbon atoms.
- Specific examples of the cycloalkyl group having 3 to 20 carbon atoms include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, and an adamantyl group. From the viewpoint of availability, a cyclopropyl group, a cyclobutyl group and an adamantyl group are preferred.
- Examples of the aryl group for R or R 1 to R n include an aryl group having 6 to 18 carbon atoms. Specific examples of the aryl group having 6 to 18 carbon atoms include a phenyl group and a naphthyl group.
- heterocyclic group for R or R 1 to R n examples include a heterocyclic group having 5 to 18 carbon atoms. Specific examples of the heterocyclic group for R or R 1 to R n include a ⁇ -butyrolactone group and an ⁇ -caprolactone group.
- each group of R or R 1 to R n may have include an alkyl group, an aryl group, a carboxyl group, an alkoxycarbonyl group (—COOR ′), a cyano group, a hydroxyl group, an amino group (—NR “R ′′), amide group (—CONR′R ′′), halogen, allyl group, epoxy group, alkoxy group (—OR ′), siloxy group, or a group having hydrophilicity or ionicity Group or atom to be used.
- R ′ and R ′′ are each independently the same hydrogen atom, alkyl group, cycloalkyl group, and aryl group as R.
- Examples of the alkoxycarbonyl group for the substituent include a methoxycarbonyl group.
- Examples of the amino group of the substituent include an amino group, a monomethylamino group, and a dimethylamino group. Examples thereof include an N-methylcarbamoyl group and an N, N-dimethylcarbamoyl group.
- Examples of the amide group of the substituent include a carbamoyl group (—CONH 2 ), an N-methylcarbamoyl group (—CONHMe), and an N, N-dimethylcarbamoyl group (dimethylamide group: —CONMe 2 ).
- Examples of the halogen for the substituent include fluorine, chlorine, bromine and iodine.
- the alkoxy group for the substituent include an alkoxy group having 1 to 12 carbon atoms, and specific examples include a methoxy group.
- Examples of the hydrophilic or ionic group of the substituent include an alkali salt of a carboxyl group or an alkali salt of a sulfoxyl group, a poly (alkylene oxide) group such as a polyethylene oxide group and a polypropylene oxide group, and a quaternary ammonium base.
- R and R 1 to R n are preferably at least one selected from an alkyl group and a cycloalkyl group, and more preferably an alkyl group.
- X 1 to X n are each independently a hydrogen atom or a methyl group.
- X 1 ⁇ X n from the viewpoint of ease of synthesis of the macromonomer (a), it is preferable more than half of the X 1 ⁇ X n are methyl groups.
- Z is a terminal group of the macromonomer (a).
- the terminal polymerizable functional group of the macromonomer include a methacryloyl group, an acryloyl group, a vinyl group, and a terminal polymerizable functional group represented by the following formula (2).
- R Z has the same meaning as R, R 1 to R n in the formula (1).
- Examples of the monomer for obtaining the macromonomer (a) include (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, and (meth) acrylic.
- Octoxy polyethylene glycol-polypropylene glycol-methacrylate (ethylene glycol chain is 8) , Propylene glycol chain is 6), trade name) and "Blemmer 20ANEP-600" (nonylphenoxy (ethylene glycol-polypropylene glycol) monoacrylate, trade name) manufactured by NOF Corporation, "Blemmer AME-100” ”(Product name) manufactured by NOF Corporation”, “Blemmer AME-200” (product name manufactured by NOF Corp.) and “Blemmer 50 AOEP-800B” (product name manufactured by NOF Corp.) Silaplane FM-0711 (trade name, manufactured by JNC Corporation) Silaplane FM-0721 (trade name, manufactured by JNC Corporation), Silaplane FM-0725 (trade name, manufactured by JNC Corporation), Silaplane TM-0701 (trade name, manufactured by JNC Corporation), Silaplane TM-0701T (trade name) X-22-174DX (trade name, manufactured by Shin
- methacrylic acid esters are preferable from the viewpoint of improving the glass transition temperature, ease of polymerization, and holding power. More preferably, methyl methacrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, cyclohexyl (meth) acrylate, isobornyl (meth) acrylate, (meth) acrylic Acid hydroxyethyl and hydroxypropyl (meth) acrylate.
- the glass transition temperature (Tga) of the macromonomer (a) is preferably 0 to 120 ° C.
- the temperature is more preferably 10 to 110 ° C., and further preferably 30 to 100 ° C., from the viewpoint that sufficient holding power can be exhibited when used as an adhesive.
- Tga can be measured with a differential scanning calorimeter (DSC).
- Macromonomer (a) can be produced by a known method.
- the method for producing the macromonomer (a) include a method using a cobalt chain transfer agent, a method using an ⁇ -substituted unsaturated compound such as ⁇ -methylstyrene dimer as a chain transfer agent, and a polymerizable group chemically. And a method by thermal decomposition.
- the production method of the macromonomer (a) is preferably a method of producing a macromonomer (a) using a cobalt chain transfer agent in terms of using a catalyst having a small number of production steps and a high chain transfer constant.
- the terminal polymerizable functional group of the macromonomer (a) when manufactured using a cobalt chain transfer agent has the structure of the above formula (2).
- Examples of the method for producing the macromonomer (a) using a cobalt chain transfer agent include an aqueous dispersion polymerization method such as a bulk polymerization method, a solution polymerization method, a suspension polymerization method, and an emulsion polymerization method.
- An aqueous dispersion polymerization method is preferred from the viewpoint that the recovery step is simple.
- the monomer mixture includes a macromonomer (a) and a vinyl monomer (b).
- the content of the macromonomer (a) in the monomer mixture is preferably 7 to 40% by mass.
- the content of the macromonomer (a) is 7% by mass or more, the retention tends to be good when used as an adhesive.
- the coatability tends to be good.
- the content of the macromonomer (a) is preferably 8 to 30% by mass, more preferably 9 to 20% by mass.
- the (meth) acrylic copolymer (A) is a copolymer obtained by polymerizing a monomer mixture containing the macromonomer (a) and the vinyl monomer (b).
- a production method it can be produced by a known polymerization method such as a solution polymerization method, a suspension polymerization method and an emulsion polymerization method.
- a solution polymerization method is preferable.
- the (meth) acrylic copolymer (A) a polymer having only repeating units derived from the macromonomer (a), one or more repeating monomers derived from the vinyl monomer (b). It can contain at least 1 sort (s) chosen from the polymer which has a unit, an unreacted macromonomer (a), and an unreacted vinyl monomer (b).
- the (meth) acrylic copolymer (A) is a block copolymer having repeating units derived from the macromonomer (a) and the vinyl monomer (b), and a repeating unit derived from the macromonomer (a) in the side chain. It contains at least one selected from graft copolymers of vinyl monomers having units.
- Vinyl monomer (b) The vinyl monomer (b) used in the present invention can be the same as the monomer for obtaining the macromonomer (a).
- 2-ethylhexyl acrylate, n-octyl acrylate, isooctyl acrylate, n-butyl acrylate, ethyl acrylate, and the like can exhibit flexibility as an adhesive and are (meth) acrylic copolymers (because they are hydrophobic) It is preferable because water absorption of A) can be suppressed and electrical characteristics such as the relative dielectric constant of (meth) acrylic copolymer (A) can be adjusted.
- (meth) acrylic acid, hydroxyethyl (meth) acrylate and hydroxypropyl (meth) acrylate, methyl (meth) acrylate, styrene, isobornyl (meth) acrylate, cyclohexyl (meth) acrylate, etc. preferable.
- the weight average molecular weight of the (meth) acrylic copolymer (A) is 50,000 to 1,000,000. When it is 50,000 or more, the durability of the pressure-sensitive adhesive composition tends to be good. If it is 1,000,000 or less, the coatability tends to be good. From the viewpoint of coatability, the weight average molecular weight of the (meth) acrylic copolymer (A) is preferably from 1 to 700,000, more preferably from 150,000 to 500,000.
- the glass transition temperature (TgB) of the copolymer (B) obtained by polymerizing the vinyl monomer (b) is the flexibility of the pressure-sensitive adhesive resin composition at room temperature and appropriate adhesiveness ( In order to have tackiness), the temperature is preferably ⁇ 100 ° C. to 10 ° C. TgB is more preferably ⁇ 65 ° C. to ⁇ 0 ° C. The temperature is particularly preferably ⁇ 60 ° C. to ⁇ 10 ° C.
- TgB means a value calculated by Fox's formula from the glass transition temperature and the composition ratio of the polymer obtained from the homopolymer of monomer (b).
- the calculation formula of Fox is a calculation value calculated
- equation, Polymer handbook [Polymer HandBook, J.M. Brandrup, Interscie nce, 1989]. 1 / (273 + Tg) ⁇ (Wi / (273 + Tgi)) [Wherein Wi represents the weight fraction of monomer i, and Tgi represents Tg (° C.) of the homopolymer of monomer i]
- the glass transition temperatures (Tga) and (TgB) preferably have the relationship of the following formula (3) from the viewpoint that the characteristics of the macromonomer part and the monomer unit copolymerized with the macromonomer can be sufficiently expressed. .
- the melt viscosity at 130 ° C. of the (meth) acrylic copolymer (A) of the present invention is preferably 20 to 800 Pa ⁇ s.
- coating can be performed by the hot melt method in which the resin composition is heated and coated as it is.
- the melt viscosity can be measured using, for example, a viscoelasticity measuring device Rheosol-G5000 manufactured by UBM Co., Ltd.
- a 25 mm ⁇ cone plate was used, and the viscosity ( ⁇ * ) value measured at 0.02 Hz with a strain of 0.7% at 130 ° C. was taken as the melt viscosity value at 130 ° C.
- it is preferably 20 to 600 Pa ⁇ s, more preferably 50 to 600 Pa ⁇ s, and still more preferably 100 to 500 Pa ⁇ s.
- the (meth) acrylic copolymer (A) of the present invention has a holding force X represented by the following formula of 100 or more and a peel strength Y of 3 N / 25 mm or more.
- Holding force X Holding time (40) / Holding time (90)
- Holding time (40) and holding time (90) are measured in accordance with JISZ0237 under conditions of a bonding area of 20 mm ⁇ 20 mm and a load of 0.5 kg, and represent a holding time at 40 ° C. and a holding time at 90 ° C. .
- the peel strength Y is measured in accordance with JISZ0237 at a peel angle of 180 ° and a tensile speed of 60 mm / min.
- a (meth) acrylic copolymer (A) satisfying the above conditions a monomer mixture containing a macromonomer (a) having a number average molecular weight of 500 or more and less than 6000 and a vinyl monomer (b) is polymerized. Examples thereof include (meth) acrylic copolymers having a weight average molecular weight of 50,000 to 1,000,000.
- the pressure-sensitive adhesive composition of the present invention contains a (meth) acrylic copolymer (A).
- the pressure-sensitive adhesive composition of the present invention may contain known components blended in a normal pressure-sensitive adhesive composition.
- a filler can be added to impart heat resistance, thermal conductivity, flame retardancy, electrical conductivity, and the like.
- the filler include metal powders such as zinc oxide powder and titanium oxide powder, carbon black such as acetylene black, talc, glass powder, silica powder, conductive particles, and inorganic fillers such as glass powder; polyethylene powder, Examples thereof include organic fillers such as polyester powder, polyamide powder, fluororesin powder, polyvinyl chloride powder, epoxy resin powder, and silicone resin powder. These fillers may be used alone or in combination of two or more.
- the (meth) acrylic copolymer (A) and the crosslinking agent in the pressure-sensitive adhesive composition can be cross-linked by ultraviolet irradiation or the like to form a pressure-sensitive adhesive sheet.
- a crosslinking agent that can be chemically bonded to a reactive group such as a hydroxyl group introduced into the (meth) acrylic copolymer (A), and a method of reacting by heating or curing, or (meth) as a crosslinking agent
- a crosslinking agent that can be chemically bonded to a reactive group such as a hydroxyl group introduced into the (meth) acrylic copolymer (A), and a method of reacting by heating or curing, or (meth) as a crosslinking agent
- examples thereof include a method in which a polyfunctional (meth) acrylate having two or more acryloyl groups, an acrylate having a nitrogen atom introduced therein, and a reaction initiator such as a photopolymerization initiator are added and
- a functional group can be introduced into the (meth) acrylic copolymer (A) to form a pressure-sensitive adhesive composition containing a crosslinking agent or a polymerization initiator, or a crosslinked pressure-sensitive adhesive sheet.
- the crosslinking method include isocyanate-based, epoxy-based, metal chelate-based, photocuring-based, melamine-based, aziridine-based, and the like, and these can be used in combination.
- isocyanate-based crosslinking agent examples include aromatic polyisocyanates such as xylylene diisocyanate, diphenylmethane diisocyanate, triphenylmethane triisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and hydrogenated products of the above aromatic polyisocyanates.
- aromatic polyisocyanates such as xylylene diisocyanate, diphenylmethane diisocyanate, triphenylmethane triisocyanate, tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, and hydrogenated products of the above aromatic polyisocyanates.
- Aliphatic or alicyclic polyisocyanates, dimers or trimers of these polyisocyanates, adducts composed of these polyisocyanates and polyols such as trimethylolpropane, and the like. Or
- epoxy-based crosslinking agent examples include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, bisphenol A type epoxy resin, N, N, N ′, N′-tetraglycidyl. -M-xylenediamine, 1,3-bis (N, N-diglycidylaminomethyl) cyclohexane, N, N-diglycidylaniline, N, N-diglycidyltoluidine and the like.
- Examples of the metal chelate compound include those in which a polyvalent metal is covalently or coordinately bonded to an organic compound.
- Examples of the polyvalent metal include aluminum, nickel, chromium, copper, iron, tin, titanium, zinc, cobalt, manganese, and zirconium.
- examples of the organic compound that forms a covalent bond or a coordinate bond include those having oxygen in ketone compounds such as acetylacetone, alkyl esters, alcohol compounds, carboxylic acid compounds, ether compounds, and the like.
- the photocuring system can be cross-linked by UV irradiation or the like by adding a polyfunctional (meth) acrylate having two or more (meth) acryloyl groups as a cross-linking agent and a reaction initiator such as a photopolymerization initiator.
- a polyfunctional (meth) acrylate having two or more (meth) acryloyl groups as a cross-linking agent
- a reaction initiator such as a photopolymerization initiator.
- the crosslinking agent include polyfunctional (meth) acrylates having two or more (meth) acryloyl groups, or 2 organic functional groups such as isocyanate groups, epoxy groups, melamine groups, glycol groups, siloxane groups, and amines.
- Sensory (meth) acrylate, etc. can be mentioned.
- a reaction catalyst (a tertiary amine compound, a quaternary ammonium compound, a tin laurate compound, etc.) may be appropriately contained.
- antioxidants examples include phenolic, phosphorus, hydroxylamine, and sulfur. Of these, phenol-based and phosphoric acid-based antioxidants that are less colored after heating are preferable. These may be used alone or in combination of several kinds.
- the blending amount of the antioxidant is preferably in the range of 0.1 to 5 parts by mass with respect to the (meth) acrylic copolymer.
- the pressure-sensitive adhesive resin composition can be used as a pressure-sensitive adhesive sheet after being molded into a sheet.
- the pressure-sensitive adhesive sheet can be applied in a solution state using a solvent, or can be prepared as a hot-melt pressure-sensitive adhesive composition that does not use a solvent.
- a hot-melt pressure-sensitive adhesive composition that does not use a solvent can be made thicker than a pressure-sensitive adhesive composition that uses a solvent. For example, it fills gaps between components of an image display device. A sufficient thickness can be provided.
- the pressure-sensitive adhesive sheet obtained in the present invention can be used for bonding various substrates, and exhibits very good pressure-sensitive adhesive performance.
- a transparent plastic film or by processing it into an adhesive film it can be used for laminating a vehicle or architectural window pasting film or for laminating labels in label display.
- it can use for bonding of various panels in display displays, such as a liquid crystal panel, and bonding of transparent board materials, such as glass, by processing in a transparent double-sided adhesive sheet form.
- MMA was continuously added dropwise at a rate of 0.24 part / minute for 75 minutes using a dropping pump.
- the reaction solution was held at 60 ° C. for 6 hours and then cooled to room temperature to obtain Dispersant 1 having a solid content of 10% by mass as a transparent aqueous solution.
- the inside of the polymerization apparatus was purged with nitrogen, heated to 80 ° C. and reacted for 1 hour, and further heated to 90 ° C. and held for 1 hour in order to increase the polymerization rate. Thereafter, the reaction solution was cooled to 40 ° C. to obtain an aqueous suspension containing a macromonomer. This aqueous suspension was filtered, and the filtrate was washed with deionized water, dehydrated, and dried at 40 ° C. for 16 hours to obtain macromonomer (a-1). The number average molecular weight of this macromonomer (a-1) was 1400, and the glass transition temperature measured by DSC was 55 ° C.
- GPC gel permeation chromatography
- Transparency A solution obtained by removing the solvent from the polymer solution after polymerization under reduced pressure is placed in a 200 mL transparent wide-mouth screw mouth bottle and visually observed under diffuse daylight. If it is transparent and no foreign matter or separation is observed, it will be “ ⁇ ”.
- Coating property evaluation (melt viscosity at 130 ° C) The measurement was performed using a viscoelasticity measuring device Rheosol-G5000 manufactured by UBM Co., Ltd. Using a 25 mm ⁇ cone plate, the viscosity ( ⁇ * ) when measured at 130 ° C. with a strain of 0.7% and 0.02 Hz was taken as the value of the melt viscosity at 130 ° C., and coating properties were judged according to the following criteria. . 500 Pa ⁇ s or less: ⁇ More than 500 Pa ⁇ s and less than 800 Pa ⁇ s: ⁇ Over 800 Pa ⁇ s: ⁇
- one side of the acrylic copolymer (A) made into a sheet with both sides sandwiched between release films is peeled off, and 2 kg of polyethylene terephthalate film (hereinafter referred to as PET film) is used instead.
- PET film polyethylene terephthalate film
- Crimped with a hand roller This is cut into a 20 mm x 100 mm strip, the other release film is peeled off, and a 30 mm x 100 mm SUS plate is attached horizontally using a 2 kg hand roller so that the bonding surface is 20 x 20 mm. Combined. After curing at 40 ° C.
- Adhesion test In accordance with JISZ0237, the peel strength Y for a glass substrate is measured at a peel angle of 180 ° and a tensile speed of 60 mm / min. Moreover, the peeled glass base material surface was observed visually and the presence or absence of the adhesive residue was confirmed. The adhesive strength was determined according to the following criteria. Y ⁇ 3N / 25mm and no adhesive residue: ⁇ Y ⁇ 3N / 25mm, and there is adhesive residue: ⁇ Y ⁇ 3N / 25mm: ⁇
- Example 1 [Examples 1 to 19, Comparative Examples 1 to 3]
- the (meth) acrylic copolymer (A-1) produced in Production Example 1 was measured for melt viscosity, transparency, holding power and adhesive strength at 130 ° C. Table 3 shows the results.
- the (meth) acrylic copolymers (A-2 to A-21) of Production Examples 2 to 21 were measured in the same manner (Tables 3 and 4).
- Example 11 shows an example in which the (meth) acrylic copolymer (A-4) was used and the coating method was changed to the hot melt method.
- [Example 1] to [Example 19] exhibited good coatability and holding power as an adhesive.
- [Comparative Example 1] has a high melt viscosity at 130 ° C. of the (meth) acrylic copolymer (A-11) using a commercially available macromonomer (a) having a number average molecular weight of 6000. It was inferior. Moreover, transparency was also bad and it was inferior to adhesive force.
- [Comparative Example 2] uses a (meth) acrylic copolymer (A-12) that does not use the macromonomer (a), and [Comparative Example 3] shows the number average molecular weight of the macromonomer (a). The overall evaluation of the holding power of the (meth) acrylic aggregate (A-13) using this was slightly lower, and the adhesive strength was further deteriorated.
- Example 20 to 23 The pressure-sensitive adhesive composition having the composition shown in Table 5 was cured or crosslinked by ultraviolet irradiation or the like. Even in this case, it had good holding power and adhesive strength.
- Apparatus 2P curing apparatus, light source: metal halide, irradiation intensity: 100 mW / cm 2 , irradiation amount: 3000 mJ / cm 2
- NK-A-600 “NK Ester 600” Brand name made by Shin-Nakamura Chemical (polyethylene glycol # 600 diacrylate)
- IRG184 "IRGACURE184"
- TPA-100 “Duranate TPA-100”, trade name, manufactured by Asahi Kasei (polyisocyanurate)
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Abstract
Description
また、2種以上の共重合体を単に混合しただけでは、共重合体同士は混ざり合うことなく各単量体単位が有する特性よりも劣ることが多かった。
これらの問題を解決するため、マクロモノマーを用いた共重合体の検討が行われてきた。マクロモノマーとは重合可能な官能基を持つ高分子量単量体である。マクロモノマーが共重合された共重合体は、マクロモノマー部分およびマクロモノマーと共重合される単量体単位それぞれの特性を損なうことなく個々の特性が発現できる、という特徴を有する。そのため、例えば粘接着剤分野においても、この種のマクロモノマーを用いた共重合体が種々提案されている。
また特許文献2には、アルキル(メタ)アクリレートモノマーと、数平均分子量が1000~200,000およびガラス転移温度が30~150℃のマクロモノマーを共重合して得られる粘着剤用樹脂組成物が開示されている。
また本発明は、この(メタ)アクリル系共重合体(A)を含む粘着剤組成物に関する。
さらに本発明は、この粘着剤組成物を用いた粘着シートに関する。
マクロモノマーとは一般にポリマー末端に重合性基が導入された高分子化合物を意味する。本発明におけるマクロモノマー(a)の数平均分子量は500以上6000未満である。粘着力と塗工性とのバランスの関係から、数平均分子量は800~5500であることが好ましく、1000~4500であることがより好ましい。
式(1)において、R及びR1~Rnは、それぞれ独立に、水素原子、アルキル基、シクロアルキル基、アリール基又は複素環基である。アルキル基、シクロアルキル基、アリール基又は複素環基は、置換基を有することができる。
上記置換基のアミノ基としては、アミノ基、モノメチルアミノ基、ジメチルアミノ基が挙げられる。例えば、N-メチルカルバモイル基及びN,N-ジメチルカルバモイル基が挙げられる。
上記置換基のアミド基としては、例えば、カルバモイル基(-CONH2),N-メチルカルバモイル基(-CONHMe)、N,N-ジメチルカルバモイル基(ジメチルアミド基:-CONMe2)が挙げられる。
上記置換基のアルコキシ基としては、例えば、炭素数1~12のアルコキシ基が挙げられ、具体例としては、メトキシ基が挙げられる。
上記置換基の親水性又はイオン性を示す基としては、例えば、カルボキシル基のアルカリ塩又はスルホキシル基のアルカリ塩、ポリエチレンオキシド基、ポリプロピレンオキシド基等のポリ(アルキレンオキシド)基及び四級アンモニウム塩基等のカチオン性置換基が挙げられる。
R及びR1~Rnは、アルキル基及びシクロアルキル基から選ばれる少なくとも1種が好ましく、アルキル基がより好ましい。
X1~Xnは、マクロモノマー(a)の合成し易さの観点から、X1~Xnの半数以上がメチル基であることが好ましい。
本発明において、マクロモノマー(a)のガラス転移温度(Tga)は0~120℃であることが好ましい。粘着剤として用いた場合に十分な保持力を発現できる点から10~110℃がより好ましく、30~100℃がさらに好ましい。
なお、Tgaは、示差走査熱量計(DSC)で測定することができる。
マクロモノマー(a)は、公知の方法で製造できる。マクロモノマー(a)の製造方法としては、例えば、コバルト連鎖移動剤を用いて製造する方法、α-メチルスチレンダイマー等のα置換不飽和化合物を連鎖移動剤として用いる方法、重合性基を化学的に結合させる方、及び熱分解による方法が挙げられる。
これらの中で、マクロモノマー(a)の製造方法としては、製造工程数が少なく、連鎖移動定数の高い触媒を使用する点でコバルト連鎖移動剤を用いて製造する方法が好ましい。なおコバルト連鎖移動剤を用いて製造した場合のマクロモノマー(a)の末端重合性官能基は前記式(2)の構造を有する。
単量体混合物は、マクロモノマー(a)およびビニル単量体(b)を含む。
単量体混合物中、マクロモノマー(a)の含有量は7~40質量%が好ましい。マクロモノマー(a)の含有量が7質量%以上であると、粘着剤として用いた場合に保持力が良好となる傾向にある。40質量%以下であると塗工性が良好となる傾向にある。粘着剤の保持力および塗工性の点から、マクロモノマー(a)の含有量は8~30質量%が好ましく、より好ましくは9~20質量%である。
(メタ)アクリル系共重合体(A)は、前記マクロモノマー(a)およびビニル単量体(b)を含む単量体混合物を重合して得られる共重合体である。製造方法としては、溶液重合法、懸濁重合法及び乳化重合法等、公知の重合方法によって製造することが可能である。本発明においては粘着剤組成物として用いるため、溶液重合法が好ましい。
さらに、(メタ)アクリル系共重合体(A)は、マクロモノマー(a)およびビニル単量体(b)由来の繰り返し単位を有するブロック共重合体ならびに側鎖にマクロモノマー(a)由来の繰り返し単位を有する、ビニル単量体のグラフト共重合体から選ばれる少なくとも一種を含む。
本発明に用いられるビニル単量体(b)は、マクロモノマー(a)を得るための単量体と同等のものを用いることができる。特に2-エチルヘキシルアクリレート、n-オクチルアクリート、イソオクチルアクリレート、n-ブチルアクリレート、エチルアクリレートなどは粘着剤としての柔軟性が発現できる点や、疎水性であるため(メタ)アクリル系共重合体(A)の吸水を抑制したり、(メタ)アクリル系共重合(A)の比誘電率などの電気特性を調整したりすることができるため、好ましい。
また、その他に(メタ)アクリル酸、(メタ)アクリル酸ヒドロキシエチルおよび(メタ)アクリル酸ヒドロキシプロピル、(メタ)アクリル酸メチル、スチレン、(メタ)アクリル酸イソボルニル、(メタ)アクリル酸シクロヘキシル等が好ましい。
(メタ)アクリル系共重合体(A)の重量平均分子量は5万~100万である。5万以上であると、粘着剤組成物としての耐久性が良好となる傾向にある。100万以下であると塗工性が良好となる傾向にある。塗工性の点から、(メタ)アクリル系共重合体(A)の重量平均分子量は12~70万が好ましく、15~50万であることがより好ましい。
本発明において、ビニル単量体(b)を重合して得られる共重合体(B)のガラス転移温度(TgB)は室温状態での粘着剤樹脂組成物の柔軟性や、適度な接着性(タック性)を有するために、-100℃~10℃であることが好ましい。TgBは、より好ましくは-65℃~-0℃である。特に好ましくは-60℃~-10℃以下である。
なお、Foxの計算式とは以下の式により求められる計算値であり、ポリマーハンドブック〔Polymer HandBook,J.Brandrup,Interscie
nce,1989〕に記載されている値を用いて求めることができる。
1/(273+Tg)=Σ(Wi/(273+Tgi))
[式中、Wiはモノマーiの重量分率、TgiはモノマーiのホモポリマーのTg(℃)を示す]
Tga > TgB ・・・(3)
より好ましくはTga-TgB>50℃であり、最も好ましくはTga-TgB>80℃である。
保持力X=保持時間(40)/保持時間(90)
保持時間(40)、保持時間(90)は、それぞれJISZ0237に準拠して、貼り合せ面積20mm×20mm、荷重0.5kgの条件で測定し、40℃における保持時間と90℃における保持時間を表す。
剥離強度Yは、JISZ0237に準拠して、剥離角度180°、引張速度60mm/minでガラス基材に対する剥離強度を測定する。
上記条件を満たすことにより、粘着剤組成物として用いた場合に、優れた粘着保持力と粘着性を有する。
上記条件を満たす(メタ)アクリル系共重合体(A)として、数量平均分子量が500以上6000未満のマクロモノマー(a)およびビニル単量体(b)を含有する単量体混合物を重合して得られる、重量平均分子量が5万~100万である(メタ)アクリル系共重合体が挙げられる。
本発明の粘着剤組成物は、(メタ)アクリル系共重合体(A)を含むものである。
本発明の粘着剤組成物には、通常の粘着剤組成物に配合されている公知の成分を含有してもよい。例えば、耐熱性、熱伝導性、難燃性、電気伝導性等を付与するために充填剤を添加することもできる。充填剤としては、例えば、酸化亜鉛粉末、酸化チタン粉末などの金属系粉末、アセチレンブラックなどのカーボンブラック、タルク、ガラスパウダー、シリカ粉末、導電性粒子、ガラス粉末などの無機充填剤;ポリエチレン粉末、ポリエステル粉末、ポリアミド粉末、フッ素樹脂粉末、ポリ塩化ビニル粉末、エポキシ樹脂粉末、シリコーン樹脂粉末などの有機充填剤などが挙げられる。これらの充填剤は、それぞれ単独で用いてもよく、2種以上を混合して用いてもよい。
粘着シートは、溶剤を用いた溶液状態で塗工することもできるし、溶剤を用いないホットメルト系の粘着剤組成物として調製することもできる。溶剤を用いないホットメルト系の粘着剤組成物とすれば、溶剤を用いた粘着剤組成物に比べて、より厚みを持たせることができるため、例えば画像表示装置の構成部材間の空隙を充填するに足る十分な厚みを持たせることができる。
<分散剤1の製造>
撹拌機、冷却管、温度計を備えた重合装置中に、脱イオン水900部、メタクリル酸2-スルホエチルナトリウム60部、メタクリル酸カリウム10部及びメタクリル酸メチル(MMA)12部を入れて撹拌し、重合装置内を窒素置換しながら、50℃に昇温した。その中に、重合開始剤として2,2'-アゾビス(2-メチルプロピオンアミジン)二塩酸塩0.08部を添加し、更に60℃に昇温した。昇温後、滴下ポンプを使用して、MMAを0.24部/分の速度で75分間連続的に滴下した。反応溶液を60℃で6時間保持した後、室温に冷却して、透明な水溶液である固形分10質量%の分散剤1を得た。
次に、重合装置内を窒素置換し、80℃に昇温して1時間反応し、さらに重合率を上げるため、90℃に昇温して1時間保持した。その後、反応液を40℃に冷却して、マクロモノマーを含む水性懸濁液を得た。この水性懸濁液を濾過し、濾過物を脱イオン水で洗浄し、脱水し、40℃で16時間乾燥して、マクロモノマー(a-1)を得た。このマクロモノマー(a-1)の数平均分子量は1400であり、DSC測定によるガラス転移温度は55℃であった。
分散剤1への添加モノマー、重合開始剤、連鎖移動剤を表1に示す仕込み量(部)に変更した以外は、マクロモノマー(a-1)と同様の方法で製造した。得られたマクロモノマー(a)の数平均分子量(Mn)およびガラス転移温度(Tga)を表1に併せて示した。
IBXMA:メタクリル酸イソボルニル
マクロモノマー(a)のガラス転移温度(Tga)
示差査熱量計(Rigaku製DSC SmartRoader)を用いて、窒素雰囲気下、5℃/分の昇温速度で測定した。なお、標準物質としては酸化アルミニウムを使用した。
・マクロモノマー(a)
ゲル透過クロマトグラフィー(GPC)(東ソー株式会社製 HLC-8320)を用いて測定した。マクロモノマー(a)のテトラヒドロフラン溶液0.2質量%を調整後、東ソー社製カラム(TSKgel SuperHZM-M×HZM-M×HZ2000、TSKguardcolumn SuperHZ-L)が装着された装置に上記の溶液10μlを注入し、流量:0.35ml/分、溶離液:テトラヒドロフラン(安定剤BHT)、カラム温度:40℃の条件で測定し、標準ポリスチレン換算にて数平均分子量(Mn)を算出した。
・アクリル系共重合体(A)
ゲル透過クロマトグラフィー(GPC)(東ソー株式会社製 HLC-8120)を用いて測定した。アクリル系共重合体(A)のテトラヒドロフラン溶液0.3質量%を調整後、東ソー社製カラム(TSKgel SuperHM-H*4、TSKguardcolumn SuperH-H)が装着された装置に上記の溶液20μlを注入し、流量:0.0.6ml/分、溶離液:テトラヒドロフラン(安定剤BHT)、カラム温度:40℃の条件で測定し、標準ポリスチレン換算にて重量平均分子量(Mw)を算出した。
重合後の樹脂溶液を減圧乾燥にて脱溶剤したものを200mLの透明広口ねじ口瓶に採り、拡散昼光の下で肉眼観察する。透明で異物、分離を認めないときは「○」、濁り、異物、分離等の何れかが見られる場合は「×」とする。
株式会社ユービーエム製の粘弾性測定装置Rheosol-G5000を用いて測定した。25mmφのコーンプレートを用い、130℃で歪み0.7%、0.02Hzで測定した時の粘度(η*)値を130℃における溶融粘度の値とし、以下の基準に従って塗工性を判定した。
500Pa・s以下:○
500Pa・s超800Pa・s以下:△
800Pa・s超:×
JISZ0237に準拠して、両面を剥離フィルムで挟んでシート化したアクリル系共重合体(A)の一方の剥離フィルムを剥がし、代わりにポリエチレンテレフタレートフィルム(以下PETフィルムと称する)を2kgのハンドローラーにて圧着した。これを20mm×100mmの短冊状に裁断し、もう一方の剥離フィルムを剥がして、30mm×100mmのSUS板に2kgのハンドローラーを用いて、貼り合わせ面が20×20mmとなるように水平に貼り合わせた。40℃で30分養生した後、PETフィルムの先に0.5kgの重りをつけて40℃の恒温層で保持時間を測定した。以下の基準に従って保持力を判定した。
保持時間が
30分以上:◎
5分以上30分以内:○
5分以内:×
また、温度を90℃(相対湿度50%)に変えて同様に保持時間を測定した。下記式
(40℃での保持時間)/(90℃での保持時間)=X
により総合的な保持力を評価した。判定は以下の通り。
X≧230:◎
230>X≧200:○
200>X≧100:△
100>X:×
JISZ0237に準拠して、剥離角度180°、引張速度60mm/minで、ガラス基材に対する剥離強度Yを測定する。また、剥離したガラス基材面を目視で観察し、糊残りの有無を確認した。以下の基準に従って粘着力を判定した。
Y≧3N/25mm、かつ、糊残り無し:○
Y≧3N/25mm、かつ、糊残り有り:△
Y<3N/25mm:×
〈(メタ)アクリル系共重合体(A-1)の製造〉
撹拌装置、温度計、冷却管、窒素ガス導入口を備えた四つ口フラスコに、仕込み溶媒として酢酸エチル40部、マクロモノマー(a-1)10部を装入し、窒素ガス通気下で85℃に昇温した。85℃に達した後、酢酸エチル20部、アクリル酸n-ブチル90部、ベンゾイルパーオキサイド0.04部からなる混合物を4.5時間かけて滴下した。滴下終了後1時間保持した後、「パーオクタO」0.5部と酢酸エチル10部からなる混合物を1時間かけて添加した。その後、2時間保持した後、酸化防止剤として「イルガノックス1010」(BASF社製商品名)0.5部、酢酸エチル20.5部を添加後、室温まで冷却して(メタ)アクリル系共重合体(A-1)を得た。
〈(メタ)アクリル系共重合体(A-2)~(A-21)の製造〉
用いる単量体混合物(マクロモノマー(a)およびビニル単量体(b))の組成および初期仕込みの溶剤を表2に変更した以外は製造例1と同様にして(メタ)アクリル系共重合体(A-2)~(A-21)を得た。
なお、(A-12)はマクロモノマー(a)を用いなかった例である。
MMA:メタクリル酸メチル
n-BA:アクリル酸n-ブチル
2-EHA:アクリル酸-2-エチルヘキシル
CHMA:メタクリル酸シクロヘキシル
AA:アクリル酸
2-HEMA:メタクリル酸-2-ヒドロキシエチル
EtOAc:酢酸エチル
IPA:イソプロピルアルコール
製造例1により作製した(メタ)アクリル系共重合体(A-1)の130℃での溶融粘度、透明性、保持力、粘着力を測定し、表3に結果を示した。同様に製造例2~21の(メタ)アクリル系共重合体(A-2~A-21)についても同様に測定した(表3,表4)。なお、実施例11は、(メタ)アクリル系共重合体(A-4)を用い、塗工方法をホットメルト法に変更した例を示す。
表5に示す組成の粘着剤組成物を紫外線照射等によって硬化又は架橋させた。この場合においても良好な保持力、粘着力を有していた。
装置:2P硬化装置、光源:メタルハライド、照射強度:100mW/cm2、照射量:3000mJ/cm2
NK-A-600:「NKエステル600」 新中村化学製商品名 (ポリエチレングリコール#600ジアクリレート)
IRG184:「IRGACURE184」 BASF製商品名 (1-ヒドロキシ-シクロヘキシル-フェニル-ケトン)
TPA-100:「デュラネートTPA-100」旭化成製商品名(ポリイソシアヌレート)
Claims (8)
- 数量平均分子量が500以上6000未満のマクロモノマー(a)およびビニル単量体(b)を含有する単量体混合物を重合して得られる、質量平均分子量が5万~100万である、(メタ)アクリル系共重合体(A)。
- マクロモノマー(a)由来の繰り返し単位を7~40質量%含む、請求項1記載の(メタ)アクリル系共重合体(A)。
- 上記マクロモノマー(a)のガラス転移温度(Tga)が30~120℃である、請求項1または2に記載の(メタ)アクリル系共重合体(A)。
- 130℃における溶融粘度が20~800Pa・sである、請求項1~4の何れかに記載の(メタ)アクリル系共重合体(A)。
- 下記式で表される保持力Xが100以上であり、剥離強度Yが3N/25mm以上である、(メタ)アクリル系共重合体(A)。
保持力X=保持時間(40)/保持時間(90)
保持時間(40)、保持時間(90)は、それぞれJISZ0237に準拠して、貼り合せ面積20mm×20mm、荷重0.5kgの条件で測定し、40℃における保持時間と90℃における保持時間を表す。
剥離強度Yは、JISZ0237に準拠して、剥離角度180°、引張速度60mm/minでガラス基材に対する剥離強度を測定する。 - 請求項1~5の何れかに記載の(メタ)アクリル系共重合体(A)を含む粘着剤組成物。
- 請求項7に記載の粘着剤組成物を用いた粘着シート。
Priority Applications (7)
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US15/039,623 US10570237B2 (en) | 2013-11-29 | 2014-11-28 | (Meth)acrylic copolymer, adhesive composition containing same, and adhesive sheet |
CN202210348528.2A CN114591469B (zh) | 2013-11-29 | 2014-11-28 | (甲基)丙烯酸系共聚物、含有该(甲基)丙烯酸系共聚物的粘合剂组合物以及粘合片 |
CN201480065130.1A CN105992779B (zh) | 2013-11-29 | 2014-11-28 | (甲基)丙烯酸系共聚物、含有该(甲基)丙烯酸系共聚物的粘合剂组合物以及粘合片 |
EP14865841.2A EP3075753A1 (en) | 2013-11-29 | 2014-11-28 | (meth)acrylic copolymer, adhesive composition containing same, and adhesive sheet |
KR1020167012602A KR20160072163A (ko) | 2013-11-29 | 2014-11-28 | (메트)아크릴계 공중합체, 그것을 포함하는 점착제 조성물 및 점착 시트 |
JP2014559020A JP6761226B2 (ja) | 2013-11-29 | 2014-11-28 | (メタ)アクリル系共重合体を含む粘着剤組成物および粘着シート |
US16/797,297 US11306171B2 (en) | 2013-11-29 | 2020-02-21 | (Meth)acrylic copolymer, adhesive composition containing same, and adhesive sheet |
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US15/039,623 A-371-Of-International US10570237B2 (en) | 2013-11-29 | 2014-11-28 | (Meth)acrylic copolymer, adhesive composition containing same, and adhesive sheet |
US16/797,297 Continuation US11306171B2 (en) | 2013-11-29 | 2020-02-21 | (Meth)acrylic copolymer, adhesive composition containing same, and adhesive sheet |
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EP (1) | EP3075753A1 (ja) |
JP (3) | JP6761226B2 (ja) |
KR (1) | KR20160072163A (ja) |
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JP2019085479A (ja) * | 2017-11-06 | 2019-06-06 | 東洋インキScホールディングス株式会社 | 光学用粘着剤および光学粘着シート |
JP7052298B2 (ja) | 2017-11-06 | 2022-04-12 | 東洋インキScホールディングス株式会社 | 光学用粘着剤および光学粘着シート |
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JPWO2022158121A1 (ja) * | 2021-01-20 | 2022-07-28 | ||
WO2022158121A1 (ja) * | 2021-01-20 | 2022-07-28 | 三菱ケミカル株式会社 | 活性エネルギー線硬化性粘着シート、離型フィルム付き粘着シート積層体、粘着シート、画像表示装置構成用積層体および画像表示装置 |
KR20240063886A (ko) | 2021-09-13 | 2024-05-10 | 미쯔비시 케미컬 주식회사 | 점착 시트, 점착제 조성물, 이형 필름을 구비하는 점착 시트, 화상 표시 장치용 적층체 및 플렉시블 화상 표시 장치 |
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TWI773060B (zh) | 2022-08-01 |
JP2020117735A (ja) | 2020-08-06 |
JP2015127406A (ja) | 2015-07-09 |
US20170029548A1 (en) | 2017-02-02 |
CN114591469A (zh) | 2022-06-07 |
US10570237B2 (en) | 2020-02-25 |
US20200190242A1 (en) | 2020-06-18 |
KR20160072163A (ko) | 2016-06-22 |
JPWO2015080244A1 (ja) | 2017-03-16 |
CN105992779A (zh) | 2016-10-05 |
EP3075753A4 (en) | 2016-10-05 |
CN114591469B (zh) | 2025-06-06 |
JP6761226B2 (ja) | 2020-09-23 |
TW202118846A (zh) | 2021-05-16 |
JP6698269B2 (ja) | 2020-05-27 |
TWI717315B (zh) | 2021-02-01 |
TW201529777A (zh) | 2015-08-01 |
EP3075753A1 (en) | 2016-10-05 |
JP7047862B2 (ja) | 2022-04-05 |
US11306171B2 (en) | 2022-04-19 |
CN105992779B (zh) | 2022-04-26 |
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