JP6344091B2 - Adhesive and adhesive sheet - Google Patents
Adhesive and adhesive sheet Download PDFInfo
- Publication number
- JP6344091B2 JP6344091B2 JP2014132740A JP2014132740A JP6344091B2 JP 6344091 B2 JP6344091 B2 JP 6344091B2 JP 2014132740 A JP2014132740 A JP 2014132740A JP 2014132740 A JP2014132740 A JP 2014132740A JP 6344091 B2 JP6344091 B2 JP 6344091B2
- Authority
- JP
- Japan
- Prior art keywords
- monomer
- weight
- pressure
- sensitive adhesive
- meth
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
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- 230000001070 adhesive effect Effects 0.000 title claims description 46
- 239000000853 adhesive Substances 0.000 title claims description 44
- 239000000178 monomer Substances 0.000 claims description 110
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 76
- 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 41
- 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 41
- 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 41
- 229920005989 resin Polymers 0.000 claims description 35
- 239000011347 resin Substances 0.000 claims description 35
- 229920006243 acrylic copolymer Polymers 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 24
- 239000010410 layer Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 16
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000009477 glass transition Effects 0.000 claims description 10
- 229920001519 homopolymer Polymers 0.000 claims description 9
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 9
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 8
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 6
- WOBHKFSMXKNTIM-UHFFFAOYSA-N Hydroxyethyl methacrylate Chemical group CC(=C)C(=O)OCCO WOBHKFSMXKNTIM-UHFFFAOYSA-N 0.000 claims description 3
- VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 claims description 2
- URLYGBGJPQYXBN-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methyl prop-2-enoate Chemical compound OCC1CCC(COC(=O)C=C)CC1 URLYGBGJPQYXBN-UHFFFAOYSA-N 0.000 claims 1
- -1 polypropylene Polymers 0.000 description 62
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 30
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 27
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 13
- 229910052757 nitrogen Inorganic materials 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 11
- 150000002148 esters Chemical class 0.000 description 11
- 229920003023 plastic Polymers 0.000 description 11
- 239000004033 plastic Substances 0.000 description 11
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 10
- 239000000243 solution Substances 0.000 description 10
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 229920000098 polyolefin Polymers 0.000 description 9
- 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 8
- 238000011156 evaluation Methods 0.000 description 8
- 239000010408 film Substances 0.000 description 8
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 8
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 7
- 125000003118 aryl group Chemical group 0.000 description 7
- 230000015572 biosynthetic process Effects 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 229920001577 copolymer Polymers 0.000 description 7
- 238000001035 drying Methods 0.000 description 7
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 7
- 229920005672 polyolefin resin Polymers 0.000 description 7
- 238000003786 synthesis reaction Methods 0.000 description 7
- 230000002087 whitening effect Effects 0.000 description 7
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- 229920005862 polyol Polymers 0.000 description 6
- 239000002904 solvent Substances 0.000 description 6
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 5
- 239000004743 Polypropylene Substances 0.000 description 5
- 150000001298 alcohols Chemical class 0.000 description 5
- 238000005227 gel permeation chromatography Methods 0.000 description 5
- 239000003208 petroleum Substances 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 4
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- 125000002723 alicyclic group Chemical group 0.000 description 4
- 239000012298 atmosphere Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 4
- 239000013522 chelant Substances 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 229920000058 polyacrylate Polymers 0.000 description 4
- 239000003505 polymerization initiator Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 150000003077 polyols Chemical class 0.000 description 4
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 4
- 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 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 4
- 229920002554 vinyl polymer Polymers 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 3
- 239000013032 Hydrocarbon resin Substances 0.000 description 3
- 239000004793 Polystyrene Substances 0.000 description 3
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 125000002947 alkylene group Chemical group 0.000 description 3
- 125000003277 amino group Chemical group 0.000 description 3
- 239000012986 chain transfer agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000002537 cosmetic Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 125000003700 epoxy group Chemical group 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 3
- 229920006270 hydrocarbon resin Polymers 0.000 description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 229920002223 polystyrene Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 2
- NNOZGCICXAYKLW-UHFFFAOYSA-N 1,2-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC=C1C(C)(C)N=C=O NNOZGCICXAYKLW-UHFFFAOYSA-N 0.000 description 2
- 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 2
- RZVINYQDSSQUKO-UHFFFAOYSA-N 2-phenoxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC1=CC=CC=C1 RZVINYQDSSQUKO-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
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- QORUGOXNWQUALA-UHFFFAOYSA-N N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 Chemical compound N=C=O.N=C=O.N=C=O.C1=CC=C(C(C2=CC=CC=C2)C2=CC=CC=C2)C=C1 QORUGOXNWQUALA-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000007983 Tris buffer Substances 0.000 description 2
- YIMQCDZDWXUDCA-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1CCC(CO)CC1 YIMQCDZDWXUDCA-UHFFFAOYSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 125000001931 aliphatic group Chemical group 0.000 description 2
- 125000000217 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
- MTHSVFCYNBDYFN-UHFFFAOYSA-N anhydrous diethylene glycol Natural products OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 2
- 239000002928 artificial marble Substances 0.000 description 2
- HIFVAOIJYDXIJG-UHFFFAOYSA-N benzylbenzene;isocyanic acid Chemical class N=C=O.N=C=O.C=1C=CC=CC=1CC1=CC=CC=C1 HIFVAOIJYDXIJG-UHFFFAOYSA-N 0.000 description 2
- DKPFZGUDAPQIHT-UHFFFAOYSA-N butyl acetate Chemical compound CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 239000011111 cardboard Substances 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- OIWOHHBRDFKZNC-UHFFFAOYSA-N cyclohexyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1CCCCC1 OIWOHHBRDFKZNC-UHFFFAOYSA-N 0.000 description 2
- ZQMIGQNCOMNODD-UHFFFAOYSA-N diacetyl peroxide Chemical compound CC(=O)OOC(C)=O ZQMIGQNCOMNODD-UHFFFAOYSA-N 0.000 description 2
- 125000005442 diisocyanate group Chemical group 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 235000011187 glycerol Nutrition 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 2
- 239000002649 leather substitute Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- SJPFBRJHYRBAGV-UHFFFAOYSA-N n-[[3-[[bis(oxiran-2-ylmethyl)amino]methyl]phenyl]methyl]-1-(oxiran-2-yl)-n-(oxiran-2-ylmethyl)methanamine Chemical compound C1OC1CN(CC=1C=C(CN(CC2OC2)CC2OC2)C=CC=1)CC1CO1 SJPFBRJHYRBAGV-UHFFFAOYSA-N 0.000 description 2
- 239000012299 nitrogen atmosphere Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 150000001451 organic peroxides Chemical class 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 239000005060 rubber Substances 0.000 description 2
- 239000002453 shampoo Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 2
- 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
- JWYVGKFDLWWQJX-UHFFFAOYSA-N 1-ethenylazepan-2-one Chemical compound C=CN1CCCCCC1=O JWYVGKFDLWWQJX-UHFFFAOYSA-N 0.000 description 1
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 description 1
- IVIDDMGBRCPGLJ-UHFFFAOYSA-N 2,3-bis(oxiran-2-ylmethoxy)propan-1-ol Chemical compound C1OC1COC(CO)COCC1CO1 IVIDDMGBRCPGLJ-UHFFFAOYSA-N 0.000 description 1
- AVTLBBWTUPQRAY-UHFFFAOYSA-N 2-(2-cyanobutan-2-yldiazenyl)-2-methylbutanenitrile Chemical compound CCC(C)(C#N)N=NC(C)(CC)C#N AVTLBBWTUPQRAY-UHFFFAOYSA-N 0.000 description 1
- HLIQLHSBZXDKLV-UHFFFAOYSA-N 2-(2-hydroxyethoxy)-1-phenoxyethanol Chemical compound OCCOCC(O)OC1=CC=CC=C1 HLIQLHSBZXDKLV-UHFFFAOYSA-N 0.000 description 1
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 1
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 1
- OZDGMOYKSFPLSE-UHFFFAOYSA-N 2-Methylaziridine Chemical compound CC1CN1 OZDGMOYKSFPLSE-UHFFFAOYSA-N 0.000 description 1
- VUDVPVOIALASLB-UHFFFAOYSA-N 2-[(2-cyano-1-hydroxypropan-2-yl)diazenyl]-3-hydroxy-2-methylpropanenitrile Chemical compound OCC(C)(C#N)N=NC(C)(CO)C#N VUDVPVOIALASLB-UHFFFAOYSA-N 0.000 description 1
- PFHOSZAOXCYAGJ-UHFFFAOYSA-N 2-[(2-cyano-4-methoxy-4-methylpentan-2-yl)diazenyl]-4-methoxy-2,4-dimethylpentanenitrile Chemical compound COC(C)(C)CC(C)(C#N)N=NC(C)(C#N)CC(C)(C)OC PFHOSZAOXCYAGJ-UHFFFAOYSA-N 0.000 description 1
- WYGWHHGCAGTUCH-UHFFFAOYSA-N 2-[(2-cyano-4-methylpentan-2-yl)diazenyl]-2,4-dimethylpentanenitrile Chemical compound CC(C)CC(C)(C#N)N=NC(C)(C#N)CC(C)C WYGWHHGCAGTUCH-UHFFFAOYSA-N 0.000 description 1
- SYEWHONLFGZGLK-UHFFFAOYSA-N 2-[1,3-bis(oxiran-2-ylmethoxy)propan-2-yloxymethyl]oxirane Chemical compound C1OC1COCC(OCC1OC1)COCC1CO1 SYEWHONLFGZGLK-UHFFFAOYSA-N 0.000 description 1
- AOBIOSPNXBMOAT-UHFFFAOYSA-N 2-[2-(oxiran-2-ylmethoxy)ethoxymethyl]oxirane Chemical compound C1OC1COCCOCC1CO1 AOBIOSPNXBMOAT-UHFFFAOYSA-N 0.000 description 1
- WTYYGFLRBWMFRY-UHFFFAOYSA-N 2-[6-(oxiran-2-ylmethoxy)hexoxymethyl]oxirane Chemical compound C1OC1COCCCCCCOCC1CO1 WTYYGFLRBWMFRY-UHFFFAOYSA-N 0.000 description 1
- VGZZAZYCLRYTNQ-UHFFFAOYSA-N 2-ethoxyethoxycarbonyloxy 2-ethoxyethyl carbonate Chemical compound CCOCCOC(=O)OOC(=O)OCCOCC VGZZAZYCLRYTNQ-UHFFFAOYSA-N 0.000 description 1
- FWWXYLGCHHIKNY-UHFFFAOYSA-N 2-ethoxyethyl prop-2-enoate Chemical compound CCOCCOC(=O)C=C FWWXYLGCHHIKNY-UHFFFAOYSA-N 0.000 description 1
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- 239000008096 xylene Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
本発明は、プラスチック等への貼り付けに好適に使用できる粘着剤および粘着シートに関する。 The present invention relates to a pressure-sensitive adhesive and a pressure-sensitive adhesive sheet that can be suitably used for sticking to plastic or the like.
粘着剤から形成した粘着剤層を有する粘着シートは、取り扱いが容易であることからラベルや接着用途として幅広い分野で使用されている。例えば、粘着シートをプラスチック等の容器のラベルとして使用することは一般的であるが、当該プラスチック容器がポリプロピレンやポリエチレン等のポリオレフィン樹脂である場合、ポリオレフィン樹脂は、極性が低いため粘着シートを貼り付けたときの粘着力が低くラベルが剥がれやすいという問題があった。また、化粧品容器など意匠性が高いプラスチック容器は、ラベルとして使用する粘着シートにも透明性が求められる場合が多い。さらには、シャンプー容器など浴室などで使用される日用品のプラスチック容器に用いられる粘着シートには、高温高湿環境下に曝された場合でも粘着シートの透明性が維持できる耐白化性が求められていた。 The pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer formed from a pressure-sensitive adhesive is used in a wide range of fields as a label and an adhesive application because it is easy to handle. For example, it is common to use a pressure-sensitive adhesive sheet as a label for containers such as plastic, but when the plastic container is a polyolefin resin such as polypropylene or polyethylene, the polyolefin resin has a low polarity, so affix the pressure-sensitive adhesive sheet. There was a problem that the adhesive strength was low and the label was easily peeled off. In addition, a plastic container having a high design property such as a cosmetic container often requires transparency also for an adhesive sheet used as a label. In addition, pressure-sensitive adhesive sheets used in daily-use plastic containers used in bathrooms such as shampoo containers are required to have whitening resistance that can maintain the transparency of the pressure-sensitive adhesive sheet even when exposed to high temperature and high humidity. It was.
そこで、特許文献１には、炭素数８個以上のアルキル基を有する（メタ）アクリル酸アルキルエステルの占める割合が３０重量％以上のアクリル系共重合体、及び粘着付与樹脂としてロジンまたはその誘導体と水添石油樹脂とを含む粘着剤が開示されている。 Therefore, Patent Document 1 includes an acrylic copolymer in which the proportion of (meth) acrylic acid alkyl ester having an alkyl group having 8 or more carbon atoms is 30% by weight or more, and rosin or a derivative thereof as a tackifier resin; An adhesive containing hydrogenated petroleum resin is disclosed.
また、特許文献２には、アクリル系共重合体１００質量部と、重量平均分子量が１０００以上３００００未満のアクリル系共重合体１〜７０質量部と、水素添加型粘着付与樹脂１〜５０質量部とを含む粘着剤が開示されている。 Patent Document 2 discloses that 100 parts by mass of an acrylic copolymer, 1 to 70 parts by mass of an acrylic copolymer having a weight average molecular weight of 1000 or more and less than 30000, and 1 to 50 parts by mass of a hydrogenated tackifying resin. A pressure-sensitive adhesive containing
また、特許文献３には、６５〜９４．５重量％のアクリル酸エステルと、０．５〜５重量％の極性架橋性モノマーと、５〜３０重量％の非極性モノマーの反応生成物とを含むコポリマー１００部に対して、３０〜７０部の水素添加炭化水素粘着付与剤と、０．０１〜３部の架橋剤とを含む粘着剤が開示されている。 Patent Document 3 discloses a reaction product of 65 to 94.5% by weight of an acrylic ester, 0.5 to 5% by weight of a polar crosslinkable monomer, and 5 to 30% by weight of a nonpolar monomer. An adhesive containing 30 to 70 parts of a hydrogenated hydrocarbon tackifier and 0.01 to 3 parts of a crosslinker is disclosed for 100 parts of the copolymer it contains.
また、特許文献４には、炭素数が２〜１４のアルキル基を有するアクリル系単量体２０〜８０重量％および芳香族基を有する単量体８０〜２０重量％を単量体単位として含有するアクリル系共重合体１００重量部に対し、芳香族環またはその水添物を有してなり、かつ屈折率１．５３〜１．７５のタッキファイヤーを２０〜１５０重量部を含む粘着剤が開示されている。 Patent Document 4 contains 20 to 80% by weight of an acrylic monomer having an alkyl group having 2 to 14 carbon atoms and 80 to 20% by weight of a monomer having an aromatic group as monomer units. The pressure-sensitive adhesive comprises 20 to 150 parts by weight of a tackifier having an aromatic ring or a hydrogenated product thereof and a refractive index of 1.53 to 1.75 with respect to 100 parts by weight of the acrylic copolymer. It is disclosed.
また、特許文献５には、アクリル酸ブチル３０〜７０重量％と、アクリル酸２−エチルヘキシル１０〜５０重量％と、分子内にビシクロ環構造を有するラジカル重合性モノマー成分５〜３０重量％とを含有するアクリル系共重合体１００重量部と、粘着付与剤３〜６０重量部とを含む粘着剤が開示されている。 Patent Document 5 includes 30 to 70% by weight of butyl acrylate, 10 to 50% by weight of 2-ethylhexyl acrylate, and 5 to 30% by weight of a radical polymerizable monomer component having a bicyclo ring structure in the molecule. A pressure-sensitive adhesive containing 100 parts by weight of an acrylic copolymer and 3 to 60 parts by weight of a tackifier is disclosed.
しかし、特許文献１の粘着剤は、アクリル系重合体との相溶性が悪い水添石油樹脂を含むので粘着剤の透明性が低い問題があった。
また、特許文献２の紫外線硬化型粘着剤は、粘着剤層と基材の密着性が低く、また、プラスチック容器を廃棄する際に、容器側に粘着剤層が残留しやすいため分別処理が難しく環境適性が低かった、また、硬化剤を使用していないため、粘着力等の物性調整が難しいという問題があった。
特許文献３の粘着剤は、水素添加炭化水素粘着付与剤を多量に配合しているため、アクリル系重合体との相溶性が悪く、透明性が低いという問題があった。
特許文献４の粘着剤は、透明性は良好であったものの、ポリオレフィンに対する粘着力が低いという問題があった。
特許文献５の粘着剤は、ＳＵＳ等の極性が高い部材に対する粘着力は高いものの、極性が低いポリオレフィンに対する粘着力、および耐白化性が低い問題があった。
However, since the pressure-sensitive adhesive of Patent Document 1 contains a hydrogenated petroleum resin having poor compatibility with an acrylic polymer, there is a problem that the pressure-sensitive adhesive is low in transparency.
Further, the ultraviolet curable pressure-sensitive adhesive of Patent Document 2 has low adhesion between the pressure-sensitive adhesive layer and the base material, and when the plastic container is discarded, the pressure-sensitive adhesive layer tends to remain on the container side, so that the separation process is difficult. There was a problem that environmental suitability was low and physical properties such as adhesive strength were difficult to adjust because no curing agent was used.
Since the pressure-sensitive adhesive of Patent Document 3 contains a large amount of hydrogenated hydrocarbon tackifier, there is a problem that the compatibility with the acrylic polymer is poor and the transparency is low.
Although the pressure-sensitive adhesive of Patent Document 4 had good transparency, there was a problem that the adhesive strength to polyolefin was low.
The pressure-sensitive adhesive of Patent Document 5 has a problem of low adhesion to polyolefin having low polarity and low whitening resistance, although it has high adhesion to members having high polarity such as SUS.
本発明は、透明性、およびポリオレフィン樹脂に対する粘着力が良好であり、耐白化性が優れた粘着シートを形成できる粘着剤の提供を目的とする。 An object of the present invention is to provide a pressure-sensitive adhesive capable of forming a pressure-sensitive adhesive sheet having good transparency and adhesiveness to a polyolefin resin and having excellent whitening resistance.
本発明の粘着剤は、アクリル系共重合体と、ロジン系樹脂と、硬化剤とを含み、前記アクリル系共重合体が、アクリル酸ブチル６０〜９８．５重量％と、カルボキシル基含有モノマー１〜９．９重量％と、モノマー（Ｘ）０．５〜２０重量％とを含むモノマー混合物を溶液重合してなり、前記モノマー（Ｘ）が、ホモポリマーのガラス転移温度が１５℃以上、かつ２５℃の水１００ｍｌに対する溶解度が１ｇ未満である。 The pressure-sensitive adhesive of the present invention contains an acrylic copolymer, a rosin resin, and a curing agent, and the acrylic copolymer contains 60 to 98.5% by weight of butyl acrylate and a carboxyl group-containing monomer 1. Solution polymerization of a monomer mixture containing ˜9.9 wt% and monomer (X) 0.5 to 20 wt%, and the monomer (X) has a glass transition temperature of homopolymer of 15 ° C. or higher, and The solubility in 100 ml of water at 25 ° C. is less than 1 g.
上記の本発明によれば、主モノマーのアクリル酸ブチルと、ガラス転移温度が高く水に溶解し難いモノマー（Ｘ）とを溶液重合したアクリル系共重合体、およびロジン系樹脂を含む粘着剤を塗工して形成した粘着剤層を備えた粘着シートは、透明性が高く、ポリオレフィンに対する粘着力が良好であることに加え、耐白化性が優れる効果が得られた。 According to the present invention, an adhesive comprising an acrylic copolymer obtained by solution polymerization of a main monomer butyl acrylate and a monomer (X) having a high glass transition temperature and hardly dissolved in water, and a rosin resin. The pressure-sensitive adhesive sheet provided with the pressure-sensitive adhesive layer formed by coating had high transparency and good adhesion to polyolefin, and also had an effect of excellent whitening resistance.
本発明により、本発明は、透明性、およびポリオレフィン樹脂に対する粘着力が良好であり、耐白化性が優れた粘着シートを形成できる粘着剤を提供できる。 According to the present invention, the present invention can provide a pressure-sensitive adhesive capable of forming a pressure-sensitive adhesive sheet having excellent transparency and adhesiveness to a polyolefin resin and having excellent whitening resistance.
本発明について詳細に説明する前に用語を定義する。まず、シート、フィルムおよびテープは同義語である。（メタ）アクリル酸は、アクリル酸およびメタクリル酸を含む。（メタ）アクリレートは、アクリレートおよびメタクリレートを含む。モノマーはエチレン性不飽和二重結合含有単量体である。被着体は、粘着シートを貼り付ける相手方をいう。 Prior to describing the present invention in detail, terms will be defined. First, sheet, film and tape are synonymous. (Meth) acrylic acid includes acrylic acid and methacrylic acid. (Meth) acrylate includes acrylate and methacrylate. The monomer is an ethylenically unsaturated double bond-containing monomer. The adherend refers to the other party to which the adhesive sheet is attached.
本発明の粘着剤は、アクリル系共重合体と、ロジン系樹脂と、硬化剤とを含む。前記アクリル系共重合体は、アクリル酸ブチル６０〜９８．５重量％と、カルボキシル基含有モノマー１〜９．９重量％と、モノマー（Ｘ）０．５〜２０重量％とを含むモノマー混合物を溶液重合して得る。そして前記モノマー（Ｘ）は、ホモポリマーのガラス転移温度が１５℃以上、かつ２５℃の水１００ｍｌに対する溶解度が１ｇ未満である性質を有する。
本発明の粘着剤は、粘着シートに加工して使用することが好ましい。
The pressure-sensitive adhesive of the present invention contains an acrylic copolymer, a rosin resin, and a curing agent. The acrylic copolymer is a monomer mixture containing butyl acrylate 60 to 98.5% by weight, carboxyl group-containing monomer 1 to 9.9% by weight, and monomer (X) 0.5 to 20% by weight. Obtained by solution polymerization. The monomer (X) has a property that the homopolymer has a glass transition temperature of 15 ° C. or higher and a solubility in 100 ml of water at 25 ° C. of less than 1 g.
The pressure-sensitive adhesive of the present invention is preferably used after being processed into a pressure-sensitive adhesive sheet.
一般に粘着剤の対ポリオレフィン粘着力を向上させるには、ロジン系樹脂を多量に配合することが知られている。しかし、ロジン系樹脂を多量に配合すると粘着剤が白濁してしまうので、透明フィルム基材の粘着シートには使用し難い問題があった。本発明では、モノマー（Ｘ）を使用しモノマー混合物を溶液重合する。前記モノマー（Ｘ）は共重合性が低いので、モノマー（Ｘ）ユニットを多く含んだ共重合体が存在するため、ロジン系樹脂とアクリル系共重合体の相溶性を向上させていると推測している。そのため、本発明では、対ポリオレフィン粘着力と透明性を両立できた。 In general, it is known to add a large amount of a rosin resin in order to improve the adhesive strength of an adhesive to polyolefin. However, since a pressure-sensitive adhesive becomes cloudy when a large amount of rosin resin is blended, there is a problem that it is difficult to use for a pressure-sensitive adhesive sheet of a transparent film substrate. In the present invention, the monomer mixture is solution polymerized using the monomer (X). Since the monomer (X) has low copolymerizability, there is a copolymer containing a large amount of the monomer (X) unit, so it is assumed that the compatibility between the rosin resin and the acrylic copolymer is improved. ing. Therefore, in the present invention, both the adhesive strength to polyolefin and transparency can be achieved.
本発明でアクリル系重合体は、アクリル酸ブチル６０〜９８．５重量％と、カルボキシル基含有モノマー１〜９．９重量％と、ホモポリマーのガラス転移温度が１５℃以上、かつ２５℃の水１００ｍｌに対する溶解度が１ｇ未満であるモノマー（Ｘ）０．５〜２０重量％とを必須モノマーとし、その他のモノマーを任意モノマーとしたモノマー混合物を溶液重合した共重合体である。 In the present invention, the acrylic polymer contains 60 to 98.5% by weight of butyl acrylate, 1 to 9.9% by weight of a carboxyl group-containing monomer, and water having a glass transition temperature of 15 ° C. or more and 25 ° C. It is a copolymer obtained by solution polymerization of a monomer mixture containing 0.5 to 20% by weight of monomer (X) having a solubility in 100 ml of less than 1 g as an essential monomer and other monomers as optional monomers.
アクリル酸ブチルは、モノマー混合物の主モノマーでありモノマー混合物１００重量％中に６０〜９８．５重量％を使用することが必要であり、６５〜９０重量％がより好ましい。アクリル酸ブチルを主モノマーとしたことで粘着力と凝集力の両立が容易になる。 Butyl acrylate is a main monomer of the monomer mixture, and it is necessary to use 60 to 98.5% by weight in 100% by weight of the monomer mixture, and 65 to 90% by weight is more preferable. By using butyl acrylate as the main monomer, it becomes easy to achieve both cohesion and cohesion.
カルボキシル基含有モノマーは、硬化剤との架橋反応の架橋点として機能し、モノマー混合物１００重量％中に１〜９．９重量％を使用することが必要であり、１〜９重量％がより好ましく、２〜８重量％がさらに好ましい。カルボキシル基含有モノマーを１〜９．９重量％使用することで、所望の架橋密度が得やすく、さらにアクリル系共重合体とロジン系樹脂との相溶性が確保できる。 The carboxyl group-containing monomer functions as a crosslinking point for the crosslinking reaction with the curing agent, and it is necessary to use 1 to 9.9% by weight in 100% by weight of the monomer mixture, and more preferably 1 to 9% by weight. 2 to 8% by weight is more preferable. By using 1 to 9.9% by weight of the carboxyl group-containing monomer, a desired crosslinking density can be easily obtained, and compatibility between the acrylic copolymer and the rosin resin can be ensured.
カルボキシル基含有モノマーは、例えば（メタ）アクリル酸、フタル酸モノヒドロキシエチルアクリル酸エステル、ｐ−カルボキシベンジルアクリル酸エステル、エチレンオキサイド変性（エチレンオキサイド付加モル数：（２〜１８）フタル酸アクリル酸エステル、コハク酸モノヒドロキシエチルアクリル酸エステル、アクリル酸β−カルボキシエチル、イタコン酸等が挙げられる。これらの中でも、（メタ）アクリル酸が好ましい。 Examples of the carboxyl group-containing monomer include (meth) acrylic acid, phthalic acid monohydroxyethyl acrylate ester, p-carboxybenzyl acrylate ester, ethylene oxide modified (ethylene oxide addition moles: (2-18) phthalic acid acrylate ester. , Succinic acid monohydroxyethyl acrylate, β-carboxyethyl acrylate, itaconic acid, etc. Among these, (meth) acrylic acid is preferable.
モノマー（Ｘ）は、ホモポリマーのガラス転移温度（以下、Ｔｇともいう）が１５℃以上、かつ２５℃の水１００ｍｌに対する溶解度が１ｇ未満の性質を有する。本発明で２５℃の水１００ｍｌに対して１ｇ未満が溶解する性質とは、２５℃の環境下で水１００ｍＬにモノマーを混合し１時間攪拌した後に、水とモノマーが分離せずに均一な状態を保持できる最大量が１ｇ未満であり、モノマーが水に溶解し難い指標を意味する。モノマーが極性の高い水に溶解しないことは、モノマーの極性が低いことを意味する。一般的にモノマーの極性を示す指標として、溶解度パラメーター（以下、ＳＰ値ともいう）を用いる場合が多いが、モノマーの分子骨格から算出されるＳＰ値よりも、モノマーの水に対する溶解度を指標とした場合の方が、本発明の課題解決に寄与するモノマーを選択することができる。
また、モノマー（Ｘ）は、アクリル系共重合体のＴｇを高めて被着体との密着性を向上させながら、アクリル系共重合体とロジン系樹脂との相溶性を確保する機能を有する。また、モノマー（Ｘ）の性質を換言すると、主としてメタクリロイル基または嵩高い構造を有するともいえる。モノマー（Ｘ）は、モノマー混合物中０．５〜２０重量％が必要であり、２〜１８重量％がより好ましい。０．５〜２０重量％の範囲で使用することで密着性がより向上する。
また、モノマー（Ｘ）のホモポリマーのＴｇは１５℃以上がひつようである。Ｔｇが１５℃以上になることで密着性がより向上する。
なお、モノマー（Ｘ）のＴｇの上限値は、本発明の課題を解決できれば良いので特に限定しないが、２００℃程度である。
Monomer (X) has the property that the homopolymer has a glass transition temperature (hereinafter also referred to as Tg) of 15 ° C. or higher and a solubility in 100 ml of water at 25 ° C. of less than 1 g. In the present invention, the property that less than 1 g dissolves in 100 ml of water at 25 ° C. means that after mixing the monomer with 100 mL of water in an environment at 25 ° C. and stirring for 1 hour, the water and the monomer are not separated. The maximum amount that can be retained is less than 1 g, which means an indicator that the monomer is difficult to dissolve in water. The fact that the monomer does not dissolve in highly polar water means that the monomer has a low polarity. In general, a solubility parameter (hereinafter also referred to as SP value) is often used as an index indicating the polarity of the monomer, but the solubility of the monomer in water is used as an index rather than the SP value calculated from the molecular skeleton of the monomer. In some cases, monomers that contribute to solving the problems of the present invention can be selected.
The monomer (X) has a function of ensuring the compatibility between the acrylic copolymer and the rosin resin while increasing the Tg of the acrylic copolymer to improve the adhesion to the adherend. In other words, it can be said that the monomer (X) has mainly a methacryloyl group or a bulky structure. Monomer (X) needs 0.5-20 weight% in a monomer mixture, and 2-18 weight% is more preferable. Adhesiveness improves more by using in the range of 0.5-20 weight%.
Further, the Tg of the homopolymer of monomer (X) seems to be 15 ° C. or higher. Adhesiveness improves more because Tg will be 15 degreeC or more.
The upper limit of the Tg of monomer (X) is not particularly limited as long as the problem of the present invention can be solved, but is about 200 ° C.
モノマー（Ｘ）は、例えば、メタクリル酸エチル（Ｔｇ：６５℃）、メタクリル酸プロピル（Ｔｇ：３５℃）、メタクリル酸イソプロピル（Ｔｇ：８１℃）、メタクリル酸ブチル（Ｔｇ：２０℃）、メタクリル酸イソブチル（Ｔｇ：５３℃）、アクリル酸ｔ−ブチル（Ｔｇ：７３℃）、およびメタクリル酸ｔ−ブチル（Ｔｇ：１１８℃）等の（メタ）アクリル酸アルキルエステル；
メタクリル酸フェノキシエチル（Ｔｇ：５４℃）、メタクリル酸ベンジル（Ｔｇ：５４℃）、アクリル酸シクロヘキシル（Ｔｇ：１９℃）、メタクリル酸シクロヘキシル（Ｔｇ：８３℃）、アクリル酸イソボルニル（Ｔｇ：９７℃）、およびメタクリル酸イソボルニル（Ｔｇ：１８０℃）等の芳香環または脂環構造を有する（メタ）アクリル酸エステル；
スチレン（Ｔｇ：１００℃）、およびα−メチルスチレン（Ｔｇ：１６８℃）などのビニルモノマー等が挙げられる。なお、これらモノマーのＴｇは、ホモポリマーのＴｇである。
Monomer (X) is, for example, ethyl methacrylate (Tg: 65 ° C.), propyl methacrylate (Tg: 35 ° C.), isopropyl methacrylate (Tg: 81 ° C.), butyl methacrylate (Tg: 20 ° C.), methacrylic acid (Meth) acrylic acid alkyl esters such as isobutyl (Tg: 53 ° C.), t-butyl acrylate (Tg: 73 ° C.), and t-butyl methacrylate (Tg: 118 ° C.);
Phenoxyethyl methacrylate (Tg: 54 ° C), benzyl methacrylate (Tg: 54 ° C), cyclohexyl acrylate (Tg: 19 ° C), cyclohexyl methacrylate (Tg: 83 ° C), isobornyl acrylate (Tg: 97 ° C) And (meth) acrylic acid ester having an aromatic ring or alicyclic structure such as isobornyl methacrylate (Tg: 180 ° C.);
Examples thereof include vinyl monomers such as styrene (Tg: 100 ° C.) and α-methylstyrene (Tg: 168 ° C.). In addition, Tg of these monomers is Tg of a homopolymer.
本発明でその他のモノマーは、アクリル酸ブチル、カルボキシル基含有モノマー、およびモノマー（Ｘ）以外のモノマーである。
その他のモノマーは、粘着剤の透明性や粘着力を損なわないモノマーであれば良い。具体的には、例えば水酸基含有モノマー、アミド結合含有モノマー、エポキシ基含有モノマー、およびアミノ基含有モノマー等の反応性官能基を有するモノマー、（メタ）アクリル酸アルキルエステルモノマー、芳香環含有モノマー、アルコキシ（ポリ）アルキレンオキサイド含有モノマーおよびその他ビニルモノマー等が挙げられる。
In the present invention, the other monomer is a monomer other than butyl acrylate, a carboxyl group-containing monomer, and monomer (X).
Other monomers should just be a monomer which does not impair the transparency and adhesive force of an adhesive. Specifically, for example, monomers having reactive functional groups such as hydroxyl group-containing monomers, amide bond-containing monomers, epoxy group-containing monomers, and amino group-containing monomers, (meth) acrylic acid alkyl ester monomers, aromatic ring-containing monomers, alkoxy Examples include (poly) alkylene oxide-containing monomers and other vinyl monomers.
水酸基含有モノマーは、例えば、（メタ）アクリル酸２−ヒドロキシエチル、（メタ）アクリル酸２−ヒドロキシプロピル、（メタ）アクリル酸３−ヒドロキシプロピル、（メタ）アクリル酸２−ヒドロキシブチル、（メタ）アクリル酸３−ヒドロキシブチル、（メタ）アクリル酸４−ヒドロキシブチル、（メタ）アクリル酸６−ヒドロキシヘキシル、（メタ）アクリル酸８−ヒドロキシオクチルなどの（メタ）アクリル酸ヒドロキシアルキルエステルや、ポリエチレングリコールモノ（メタ）アクリル酸エステル、ポリプロピレングリコールモノ（メタ）アクリル酸エステル、１，４−シクロヘキサンジメタノールモノ（メタ）アクリル酸エステルなどのグリコールモノ（メタ）アクリル酸エステル、カプロラクトン変性（メタ）アクリル酸エステル、Ｎ−ヒドロキシメチル（メタ）アクリルアミド、Ｎ−ヒドロキシエチル（メタ）アクリルアミドなどのＮ−ヒドロキシアルキル（メタ）アクリルアミドが挙げられる。
これらの中でも、ホモポリマーのガラス転移温度が１５℃以上であるメタクリル酸２−ヒドロキシエチル（Ｔｇ：７１℃）、メタクリル酸２−ヒドロキシプロピル（Ｔｇ：２６℃）、１，４−シクロヘキサンジメタノールモノアクリル酸エステル（Ｔｇ：１８℃）、Ｎ−ヒドロキシエチル（メタ）アクリルアミド（Ｔｇ：９８℃）等は、ポリオレフィンに対する粘着力がより向上する場合があるため好ましい。
Examples of the hydroxyl group-containing monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, (meth) (Meth) acrylic acid hydroxyalkyl esters such as 3-hydroxybutyl acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, polyethylene glycol Mono (meth) acrylic acid ester, polypropylene glycol mono (meth) acrylic acid ester, glycol mono (meth) acrylic acid ester such as 1,4-cyclohexanedimethanol mono (meth) acrylic acid ester, caprolactone modified (meth) acrylic Ester, N- hydroxymethyl (meth) acrylamide, N- hydroxyethyl (meth) acrylamide such as N- hydroxyalkyl (meth) acrylamide.
Among them, 2-hydroxyethyl methacrylate (Tg: 71 ° C.), 2-hydroxypropyl methacrylate (Tg: 26 ° C.), 1,4-cyclohexanedimethanol mono, whose homopolymer has a glass transition temperature of 15 ° C. or higher. Acrylic acid ester (Tg: 18 ° C.), N-hydroxyethyl (meth) acrylamide (Tg: 98 ° C.) and the like are preferable because the adhesion to polyolefin may be further improved.
水酸基含有モノマーは、モノマー混合物１００重量％中、１〜２０重量％を含むことが好ましく、水酸基含有モノマーとモノマー（Ｘ）との合計量が２０重量％以下になるように含むことがより好ましい。水酸基含有モノマーを適量使用することで粘着力と透明性をより高度に両立できる。 The hydroxyl group-containing monomer preferably includes 1 to 20% by weight in 100% by weight of the monomer mixture, and more preferably includes a total amount of the hydroxyl group-containing monomer and the monomer (X) of 20% by weight or less. By using an appropriate amount of the hydroxyl group-containing monomer, both adhesive strength and transparency can be achieved to a higher degree.
アミド結合含有モノマーは、例えば（メタ）アクリルアミド、Ｎ−メチルアクリルアミド、Ｎ−イソプロピルアクリルアミド、Ｎ，Ｎ−ジメチルアクリルアミド、Ｎ，Ｎ−ジエチルアクリルアミド、Ｎ、Ｎ−ジメチルアミノプロピル（メタ）アクリルアミド、ジアセトンアクリルアミド、Ｎ−(ブトキシメチル)アクリルアミド等の（メタ）アクリルアミド系化合物；Ｎ−ビニルピロリドン、Ｎ−ビニルカプロラクタム、およびアクリロイルモルホリン等の複素環含有化合物等が挙げられる。 Examples of the amide bond-containing monomer include (meth) acrylamide, N-methylacrylamide, N-isopropylacrylamide, N, N-dimethylacrylamide, N, N-diethylacrylamide, N, N-dimethylaminopropyl (meth) acrylamide, and diacetone. Examples include (meth) acrylamide compounds such as acrylamide and N- (butoxymethyl) acrylamide; heterocyclic compounds containing N-vinylpyrrolidone, N-vinylcaprolactam, and acryloylmorpholine.
エポキシ基含有モノマーは、例えば（メタ）アクリル酸グリシジル、（メタ）アクリル酸メチルグリシジル、および（メタ）アクリル酸３，４−エポキシシクロヘキシルメチル等が挙げられる。 Examples of the epoxy group-containing monomer include glycidyl (meth) acrylate, methyl glycidyl (meth) acrylate, and 3,4-epoxycyclohexylmethyl (meth) acrylate.
アミノ基含有モノマーは、例えば（メタ）アクリル酸モノメチルアミノエチル、（メタ）アクリル酸モノエチルアミノエチル、（メタ）アクリル酸モノメチルアミノプロピル、および（メタ）アクリル酸モノエチルアミノプロピル等の（メタ）アクリル酸モノアルキルアミノエステル等が挙げられる。 Examples of amino group-containing monomers include (meth) acrylates such as monomethylaminoethyl (meth) acrylate, monoethylaminoethyl (meth) acrylate, monomethylaminopropyl (meth) acrylate, and monoethylaminopropyl (meth) acrylate. Examples include acrylic acid monoalkylamino esters.
アミド結合含有モノマー、エポキシ基含有モノマーおよびアミノ基含有モノマーは、モノマー混合物１００重量％中、それぞれ０．１〜１重量部を含むことが好ましい。 The amide bond-containing monomer, epoxy group-containing monomer, and amino group-containing monomer preferably each contain 0.1 to 1 part by weight in 100% by weight of the monomer mixture.
（メタ）アクリル酸アルキルエステルモノマーは、例えば（メタ）アクリル酸メチル、アクリル酸エチル、アクリル酸プロピル、アクリル酸イソプロピル、アクリル酸イソブチル、（メタ）アクリル酸ペンチル、（メタ）アクリル酸ヘキシル、（メタ）アクリル酸２−エチルヘキシル、（メタ）アクリル酸オクチル、（メタ）アクリル酸イソオクチル、（メタ）アクリル酸デシル、（メタ）アクリル酸イソデシル、（メタ）アクリル酸ドデシル、および（メタ）アクリル酸イソオクタデシル等が挙げられる。 Examples of (meth) acrylic acid alkyl ester monomers include methyl (meth) acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, isobutyl acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, (meth ) 2-ethylhexyl acrylate, octyl (meth) acrylate, isooctyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylate, dodecyl (meth) acrylate, and isooctadecyl (meth) acrylate Etc.
（メタ）アクリル酸アルキルエステルモノマーは、モノマー混合物１００重量％中、０．１〜２０重量部を含むことが好ましい。 The (meth) acrylic acid alkyl ester monomer preferably contains 0.1 to 20 parts by weight in 100% by weight of the monomer mixture.
芳香環含有モノマーは、例えばアクリル酸フェノキシエチル、アクリル酸ベンジル、（メタ）アクリル酸フェノキシジエチレングリコール、および（メタ）アクリル酸エチレンオキサイド変性ノニルフェノール等が挙げられる。 Examples of the aromatic ring-containing monomer include phenoxyethyl acrylate, benzyl acrylate, phenoxydiethylene glycol (meth) acrylate, and (meth) acrylate ethylene oxide-modified nonylphenol.
芳香環含有モノマーは、モノマー混合物１００重量％中、０．１〜１０重量部を含むことが好ましい。 It is preferable that an aromatic ring containing monomer contains 0.1-10 weight part in 100 weight% of monomer mixtures.
アルコキシ（ポリ）アルキレンオキサイド含有モノマーは、例えばアクリル酸２−メトキシエチル、アクリル酸２−エトキシエチル、アクリル酸２−フェノキシエチル、メトキシポリエチレングリコール（メタ）アクリル酸エステル、エトキシポリエチレングリコール（メタ）アクリル酸エステル、メトキシポリプロピレングリコール（メタ）アクリル酸エステル、エトキシポリプロピレングリコール（メタ）アクリル酸エステル、フェノキシポリエチレングリコール（メタ）アクリル酸エステル、およびフェノキシポリプロピレングリコール（メタ）アクリル酸エステル等が挙げられる。 Alkoxy (poly) alkylene oxide-containing monomers include, for example, 2-methoxyethyl acrylate, 2-ethoxyethyl acrylate, 2-phenoxyethyl acrylate, methoxypolyethylene glycol (meth) acrylate, ethoxypolyethylene glycol (meth) acrylic acid Examples include esters, methoxypolypropylene glycol (meth) acrylic acid esters, ethoxypolypropylene glycol (meth) acrylic acid esters, phenoxypolyethylene glycol (meth) acrylic acid esters, and phenoxypolypropylene glycol (meth) acrylic acid esters.
アルコキシ（ポリ）アルキレンオキサイド含有モノマーは、モノマー混合物１００重量％中、０．１〜１０重量部を含むことが好ましい。 It is preferable that an alkoxy (poly) alkylene oxide containing monomer contains 0.1-10 weight part in 100 weight% of monomer mixtures.
その他ビニルモノマーは、酢酸ビニル、およびアクリロニトリルなどが挙げられるがこれらに限定されない。 Other vinyl monomers include, but are not limited to, vinyl acetate and acrylonitrile.
その他ビニルモノマーは、モノマー混合物１００重量％中、０．１〜１０重量部を含むことが好ましい。 It is preferable that other vinyl monomers contain 0.1-10 weight part in 100 weight% of monomer mixtures.
アクリル系共重合体は、モノマー混合物に重合開始剤を加え、溶液重合することで得る。前記溶液重合に使用する溶剤は、例えば、酢酸メチル、酢酸エチル、酢酸ｎ−ブチル、酢酸イソブチル、トルエン、キシレン、ヘキサン、アセトン、メチルエチルケトン、メチルイソブチルケトン、メタノール、エタノール、ｎ−プロパノール、およびイソプロパノール等が好ましく、酢酸エチルがより好ましい。
溶剤は単独また２種類以上を併用できる。
The acrylic copolymer is obtained by adding a polymerization initiator to the monomer mixture and performing solution polymerization. Examples of the solvent used for the solution polymerization include methyl acetate, ethyl acetate, n-butyl acetate, isobutyl acetate, toluene, xylene, hexane, acetone, methyl ethyl ketone, methyl isobutyl ketone, methanol, ethanol, n-propanol, and isopropanol. Is preferred, and ethyl acetate is more preferred.
Solvents can be used alone or in combination of two or more.
前記溶液重合は、モノマー混合物１００重量部に対して重合開始剤を０．００１〜１重量部程度加えて重合を行うことが好ましい。通常、重合は、窒素気流下で、５０℃〜９０℃程度の温度で６時間〜２０時間行うことができる。また、重合の際、連鎖移動剤を使用して共重合体の重量平均分子量を適宜調整することができる。 The solution polymerization is preferably performed by adding about 0.001 to 1 part by weight of a polymerization initiator to 100 parts by weight of the monomer mixture. Usually, the polymerization can be performed under a nitrogen stream at a temperature of about 50 ° C. to 90 ° C. for 6 hours to 20 hours. Moreover, the weight average molecular weight of a copolymer can be suitably adjusted in the case of superposition | polymerization using a chain transfer agent.
本発明においてアクリル系共重合体の重量平均分子量（以下、Ｍｗという）は、３０万〜１８０万が好ましく、４０万〜１５０万がより好ましく、５０万〜１３０万がさらに好ましい。Ｍｗを３０万〜１８０万の範囲にすることで、粘着物性と塗工性の両立が容易になる。なお、本発明でＭｗは、ゲル浸透クロマトグラフィー（ＧＰＣ）により測定したポリスチレン換算の値である。 In the present invention, the weight average molecular weight (hereinafter referred to as Mw) of the acrylic copolymer is preferably 300,000 to 1,800,000, more preferably 400,000 to 1,500,000, and further preferably 500,000 to 1,300,000. By making Mw into the range of 300,000 to 1,800,000, it becomes easy to achieve both adhesive properties and coating properties. In the present invention, Mw is a value in terms of polystyrene measured by gel permeation chromatography (GPC).
前記連鎖移動剤は、例えばｎ−ドデシルメルカプタン、メルカプトイソブチルアルコール、メルカプト酢酸、２−メルカプトエタノール、チオグリコール酸、チオグルコール酸２−エチルヘキシル、２，３−ジメルカプト−１−プロパノール、グリシジルメルカプタン、α−メチルスチレンダイマー、四塩化炭素、クロロホルム、およびハイドロキノン等が挙げられる。
連鎖移動剤は、モノマー混合物１００重量部に対して０．０１〜１重量部程度を使用できる。
Examples of the chain transfer agent include n-dodecyl mercaptan, mercaptoisobutyl alcohol, mercaptoacetic acid, 2-mercaptoethanol, thioglycolic acid, 2-ethylhexyl thioglycolate, 2,3-dimercapto-1-propanol, glycidyl mercaptan, α-methyl Examples include styrene dimer, carbon tetrachloride, chloroform, and hydroquinone.
The chain transfer agent can be used in an amount of about 0.01 to 1 part by weight per 100 parts by weight of the monomer mixture.
前記重合開始剤は、アゾ系化合物および有機過酸化物が一般的である。 The polymerization initiator is generally an azo compound or an organic peroxide.
アゾ系化合物は、例えば２，２'−アゾビスイソブチロニトリル、２，２'−アゾビス（２−メチルブチロニトリル）、１，１'−アゾビス（シクロヘキサン１−カルボニトリル）、２，２'−アゾビス（２，４−ジメチルバレロニトリル）、２，２'−アゾビス（２，４−ジメチル−４−メトキシバレロニトリル）、ジメチル２，２'−アゾビス（２−メチルプロピオネート）、４，４'−アゾビス（４−シアノバレリック酸）、２，２'−アゾビス（２−ヒドロキシメチルプロピオニトリル）、および２，２'−アゾビス（２−（２−イミダゾリン−２−イル）プロパン）等が挙げられる。 Examples of the azo compound include 2,2′-azobisisobutyronitrile, 2,2′-azobis (2-methylbutyronitrile), 1,1′-azobis (cyclohexane 1-carbonitrile), 2,2 '-Azobis (2,4-dimethylvaleronitrile), 2,2'-azobis (2,4-dimethyl-4-methoxyvaleronitrile), dimethyl 2,2'-azobis (2-methylpropionate), 4 , 4′-azobis (4-cyanovaleric acid), 2,2′-azobis (2-hydroxymethylpropionitrile), and 2,2′-azobis (2- (2-imidazolin-2-yl) propane ) And the like.
有機過酸化物は、例えば過酸化ベンゾイル、ｔ−ブチルパーベンゾエイト、クメンヒドロパーオキシド、ジイソプロピルパーオキシジカーボネート、ジ−ｎ−プロピルパーオキシジカーボネート、ジ（２−エトキシエチル）パーオキシジカーボネート、ｔ−ブチルパーオキシネオデカノエート、ｔ−ブチルパーオキシビバレート、（３，５，５−トリメチルヘキサノイル）パーオキシド、ジプロピオニルパーオキシド、ジアセチルパーオキシド等が挙げられる。
重合開始剤は、単独または２種以上を併用できる。
Examples of the organic peroxide include benzoyl peroxide, t-butyl perbenzoate, cumene hydroperoxide, diisopropyl peroxydicarbonate, di-n-propyl peroxydicarbonate, di (2-ethoxyethyl) peroxydicarbonate. , T-butyl peroxyneodecanoate, t-butyl peroxybivalate, (3,5,5-trimethylhexanoyl) peroxide, dipropionyl peroxide, diacetyl peroxide and the like.
The polymerization initiators can be used alone or in combination of two or more.
本発明において硬化剤は、イソシアネート化合物、エポキシ化合物、アジリジン化合物、金属キレート、およびアミン化合物からなる群より選択される１種以上が好ましく、エポキシ化合物、金属キレート、およびアジリジン化合物がより好ましい。 In the present invention, the curing agent is preferably at least one selected from the group consisting of an isocyanate compound, an epoxy compound, an aziridine compound, a metal chelate, and an amine compound, and more preferably an epoxy compound, a metal chelate, and an aziridine compound.
エポキシ化合物は、例えばビスフェノールＡ−エピクロロヒドリン型のエポキシ系樹脂、エチレングリコールジグリシジルエーテル、ポリエチレングリコールジグリシジルエーテル、グリセリンジグリシジルエーテル、グリセリントリグリシジルエーテル、１，６−ヘキサンジオールジグリシジルエーテル、トリメチロールプロパントリグリシジルエーテル、ジグリシジルアニリン、Ｎ，Ｎ，Ｎ'，Ｎ'−テトラグリシジル−ｍ−キシリレンジアミン、１、３−ビス（Ｎ、Ｎ’−ジグリシジルアミノメチル）シクロヘキサン、およびＮ，Ｎ，Ｎ'，Ｎ'−テトラグリシジルアミノフェニルメタン等が挙げられる。 Examples of the epoxy compound include bisphenol A-epichlorohydrin type epoxy resin, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, 1,6-hexanediol diglycidyl ether, Trimethylolpropane triglycidyl ether, diglycidyl aniline, N, N, N ′, N′-tetraglycidyl-m-xylylenediamine, 1,3-bis (N, N′-diglycidylaminomethyl) cyclohexane, and N , N, N ′, N′-tetraglycidylaminophenylmethane and the like.
アジリジン化合物は、例えばＮ，Ｎ’−ジフェニルメタン−４，４'−ビス（１−アジリジンカルボキサイト）、Ｎ，Ｎ’−トルエン−２，４−ビス（１−アジリジンカルボキサイト）、ビスイソフタロイル−１−（２−メチルアジリジン）、トリ−１−アジリジニルホスフィンオキサイド、Ｎ，Ｎ’−ヘキサメチレン−１，６−ビス（１−アジリジンカルボキサイト）、２，２’−ビスヒドロキシメチルブタノール−トリス［３−（１−アジリジニル）プロピオネート］、トリメチロールプロパントリ−β−アジリジニルプロピオネート、テトラメチロールメタントリ−β−アジリジニルプロピオネート、およびトリス−２，４，６−（１−アジリジニル）−１、３、５−トリアジン等が挙げられる。 Examples of the aziridine compound include N, N′-diphenylmethane-4,4′-bis (1-aziridinecarboxite), N, N′-toluene-2,4-bis (1-aziridinecarboxite), and bisisophthaloyl. -1- (2-methylaziridine), tri-1-aziridinylphosphine oxide, N, N′-hexamethylene-1,6-bis (1-aziridinecarboxite), 2,2′-bishydroxymethylbutanol -Tris [3- (1-aziridinyl) propionate], trimethylolpropane tri-β-aziridinylpropionate, tetramethylolmethanetri-β-aziridinylpropionate, and Tris-2,4,6- (1-aziridinyl) -1,3,5-triazine and the like.
金属キレートは、例えばアルミニウム、鉄、銅、亜鉛、スズ、チタン、ニッケル、アンチモン、マグネシウム、バナジウム、クロムおよびジルコニウムなどの多価金属と、アセチルアセトンまたはアセト酢酸エチルとの配位化合物等が挙げられる。 Examples of the metal chelate include coordination compounds of polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium and zirconium, and acetylacetone or ethyl acetoacetate.
イソシアネート化合物は、例えばトリレンジイソシアネート、ヘキサメチレンジイソシアネート、イソホロンジイソシアネート、キシリレンジイソシアネート、水添キシリレンジイソシアネート、ジフェニルメタンジイソシアネート、水添ジフェニルメタンジイソシアネート、テトラメチルキシリレンジイソシアネート、ナフタレンジイソシアネート、トリフェニルメタントリイソシアネート、およびポリメチレンポリフェニルイソシアネート等のジイソシアネートとトリメチロールプロパン等のポリオール化合物とのアダクト体、ならびにそのビュレット体、ならびにそのイソシアヌレート体、ならびに前記ジイソシアネートと、ポリエーテルポリオール、ポリエステルポリオール、アクリルポリオール、ポリブタジエンポリオール、およびポリイソプレンポリオール等のうちのいずれかのポリオールとのアダクト体などの分子内に３個以上のイソシアネート基を有する化合物；
トリレンジイソシアネート、ヘキサメチレンジイソシアネート、イソホロンジイソシアネート、キシリレンジイソシアネート、水添キシリレンジイソシアネート、ジフェニルメタンジイソシアネート、水添ジフェニルメタンジイソシアネート、テトラメチルキシリレンジイソシアネート、ナフタレンジイソシアネート、トリフェニルメタントリイソシアネート、およびポリメチレンポリフェニルイソシアネート等のジイソシアネート、ならびにヘキサメチレンジイソシアネートのアロファネート体等の分子内に２個のイソシアネート基を有する化合物；等が挙げられる。これらの中でも、トリレンジイソシアネートのトリメチロールプロパンアダクト体が、粘着物性を容易に調整できるため好ましい。なお、イソシアネート基の個数は平均個数である。
Isocyanate compounds include, for example, tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, tetramethylxylylene diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate, and An adduct of a diisocyanate such as polymethylene polyphenyl isocyanate and a polyol compound such as trimethylolpropane, and its burette, and its isocyanurate, and the diisocyanate, polyether polyol, polyester polyol, acrylic polyol, polybutadiene polyol, And Compounds having 3 or more isocyanate groups in the molecule, such as an adduct with any of the polyols of the polyisoprene polyol;
Tolylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, hydrogenated xylylene diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate, tetramethylxylylene diisocyanate, naphthalene diisocyanate, triphenylmethane triisocyanate, and polymethylene polyphenyl isocyanate And the like, and compounds having two isocyanate groups in the molecule such as allophanate of hexamethylene diisocyanate. Among these, a trimethylolpropane adduct of tolylene diisocyanate is preferable because the adhesive properties can be easily adjusted. In addition, the number of isocyanate groups is an average number.
アミン化合物は、例えばヘキサメチレンジアミン、トリエチルジアミン、ポリエチレンイミン、ヘキサメチレンテトラミン、ジエチレントリアミン、トリエチルテトラミン、イソホロンジアミン、アミノ樹脂、およびメチレン樹脂等が挙げられる。
硬化剤は単独または２種以上を併用できる。
Examples of the amine compound include hexamethylenediamine, triethyldiamine, polyethyleneimine, hexamethylenetetramine, diethylenetriamine, triethyltetramine, isophoronediamine, amino resin, and methylene resin.
A hardening | curing agent can be used individually or in combination of 2 or more types.
硬化剤は、アクリル系共重合体１００重量部に対して、０．０１〜６重量部を含むことが好ましい。０．０１〜６重量部を含むと粘着剤層の凝集力と粘着力のバランスを取ることが容易になる。 It is preferable that a hardening | curing agent contains 0.01-6 weight part with respect to 100 weight part of acrylic copolymers. When it contains 0.01 to 6 parts by weight, it becomes easy to balance the cohesive force and adhesive force of the adhesive layer.
本発明の粘着剤は、さらにロジン系樹脂を含むことが必要である。粘着剤がロジン系樹脂を含むとポリオレフィンに対する粘着力がより向上する。 The pressure-sensitive adhesive of the present invention needs to further contain a rosin resin. When the pressure-sensitive adhesive contains a rosin resin, the adhesion to polyolefin is further improved.
ロジン系樹脂は、ガムロジン、トール油ロジン、ウッドロジンの未変性ロジンをアルコールなどでエステル化したロジンエステルや、未変性ロジンを変性した不均化ロジン、重合ロジン、水添ロジンなどの変性ロジン、これら変性ロジンをさらにアルコールなどでエステル化した不均化ロジンエステル、重合ロジンエステル、水添ロジンエステルなどの変性ロジンエステル、未変性ロジンにフェノールを付加したロジンフェノール等が好ましい。これらの中でも粘着力および透明性がより向上するためロジンエステル、および変性ロジンエステルが好ましい。なお、ロジンエステルおよび変性ロジンエステルには、エステル化に用いたアルコールなどの水酸基の一部が未反応で残存している場合もある。エステル化に用いるアルコールは、メタノールなどの単官能アルコール、エチレングリコールなどの２官能アルコール、グリセリンなどの３官能アルコール、およびペンタエリスリトールなどの４官能アルコールが挙げられるが、アクリル系共重合体との相溶性を考慮すると３官能以下のアルコールが好ましい。
ロジン系樹脂は、単独または２種以上を併用できる。
Rosin resins include gum rosin, tall oil rosin, rosin ester obtained by esterifying unmodified rosin of wood rosin with alcohol, disproportionated rosin modified from unmodified rosin, polymerized rosin, modified rosin such as hydrogenated rosin, etc. A disproportionated rosin ester obtained by esterifying a modified rosin with an alcohol or the like, a modified rosin ester such as a polymerized rosin ester or a hydrogenated rosin ester, or a rosin phenol obtained by adding phenol to an unmodified rosin is preferred. Among these, a rosin ester and a modified rosin ester are preferable because adhesive strength and transparency are further improved. In the rosin ester and modified rosin ester, some hydroxyl groups such as alcohol used for esterification may remain unreacted. Examples of the alcohol used for esterification include monofunctional alcohols such as methanol, bifunctional alcohols such as ethylene glycol, trifunctional alcohols such as glycerin, and tetrafunctional alcohols such as pentaerythritol. In view of solubility, trifunctional or lower alcohols are preferred.
The rosin resins can be used alone or in combination of two or more.
ロジン系樹脂の軟化点は、４０〜１１０℃が好ましい。軟化点を４０〜１１０℃にすると粘着力および透明性を両立することが容易となる。 The softening point of the rosin resin is preferably 40 to 110 ° C. When the softening point is 40 to 110 ° C., it becomes easy to achieve both adhesive strength and transparency.
ロジン系樹脂は、アクリル系共重合体１００重量部に対して、１０〜６０重量部配合することが好ましく、２０〜５０重量部がより好ましい。 The rosin resin is preferably blended in an amount of 10 to 60 parts by weight and more preferably 20 to 50 parts by weight with respect to 100 parts by weight of the acrylic copolymer.
本発明の粘着剤は、課題が解決できる範囲であれば他の粘着付与樹脂を含んでも良い。例えば、テルペン樹脂、脂環族炭化水素樹脂、脂肪族石油樹脂、芳香族石油樹脂、アルキルフェノールホルムアルデヒド樹脂（油性フェノール樹脂）等が好ましい。他の粘着付与樹脂は、単独または２種以上を併用できる。 The pressure-sensitive adhesive of the present invention may contain other tackifying resins as long as the problem can be solved. For example, terpene resins, alicyclic hydrocarbon resins, aliphatic petroleum resins, aromatic petroleum resins, alkylphenol formaldehyde resins (oil-based phenol resins) and the like are preferable. Other tackifying resins can be used alone or in combination of two or more.
前記他の粘着付与樹脂は、アクリル系共重合体１００重量部に対して、１５重量部以下を配合することが好ましく、特に脂環族炭化水素樹脂、および脂肪族石油樹脂は、それぞれ５重量部以下配合することが好ましい。 The other tackifying resin is preferably blended in an amount of 15 parts by weight or less with respect to 100 parts by weight of the acrylic copolymer, and in particular, each of the alicyclic hydrocarbon resin and the aliphatic petroleum resin is 5 parts by weight. It is preferable to mix | blend below.
本発明の粘着剤は、本発明の課題解決ができる範囲で、任意成分として各種樹脂、硬化触媒、シランカップリング剤、オイル、軟化剤、染料、顔料、酸化防止剤、紫外線吸収剤、耐候安定剤、可塑剤、充填剤、老化防止剤および帯電防止剤等を配合しても良い。 The pressure-sensitive adhesive of the present invention is a resin, curing catalyst, silane coupling agent, oil, softening agent, dye, pigment, antioxidant, ultraviolet absorber, weather resistance stability as optional components within the range that can solve the problems of the present invention. You may mix | blend an agent, a plasticizer, a filler, anti-aging agent, an antistatic agent, etc.
本発明の粘着剤は、化粧品、日用品、食品などのポリオレフィン樹脂等のプラスチック容器へのの貼り付け用粘着剤として好適であるほか、一般ラベル・シール、粘着性光学フィルム、塗料、弾性壁材、塗膜防水材、床材、粘着性付与剤、粘着剤、積層構造体用粘着剤、シーリング剤、成形材料、表面改質用コーティング剤、バインダー（磁気記録媒体、インキバインダー、鋳物バインダー、焼成レンガバインダー、グラフト材、マイクロカプセル、グラスファイバーサイジング等）、ウレタンフォーム（硬質、半硬質、軟質）、ウレタンＲＩＭ、ＵＶ・ＥＢ硬化樹脂、ハイソリッド塗料、熱硬化型エラストマー、マイクロセルラー、繊維加工剤、可塑剤、吸音材料、制振材料、界面活性剤、ゲルコート剤、人工大理石用樹脂、人工大理石用耐衝撃性付与剤、インキ用樹脂、フィルム（ラミネート粘着剤、保護フィルム等）、合わせガラス用樹脂、反応性希釈剤、各種成形材料、弾性繊維、人工皮革、合成皮革等の原料として、又、各種樹脂添加剤およびその原料等としても非常に有用に使用できる。 The pressure-sensitive adhesive of the present invention is suitable as a pressure-sensitive adhesive for attaching to plastic containers such as polyolefin resins for cosmetics, daily necessities, foods, etc., as well as general labels and seals, adhesive optical films, paints, elastic wall materials, Waterproofing film, flooring, tackifier, adhesive, laminated structure adhesive, sealing agent, molding material, surface modification coating agent, binder (magnetic recording medium, ink binder, casting binder, fired brick Binder, graft material, microcapsule, glass fiber sizing, etc.), urethane foam (hard, semi-rigid, soft), urethane RIM, UV / EB curable resin, high solid paint, thermosetting elastomer, microcellular, fiber processing agent, Plasticizer, sound absorbing material, vibration damping material, surfactant, gel coat agent, resin for artificial marble, for artificial marble As raw materials for impact imparting agents, ink resins, films (laminate adhesives, protective films, etc.), laminated glass resins, reactive diluents, various molding materials, elastic fibers, artificial leather, synthetic leather, etc. It can also be used very useful as a resin additive and its raw material.
本発明の粘着シートは、基材、および本発明の粘着剤から形成した粘着剤層を備えていることが好ましい。また別の態様として、芯材の両面に粘着剤層を有する両面粘着シート、または基材および芯材を有さず粘着剤層のみで構成されたキャスト粘着シートも好ましい。前記粘着剤層は、粘着剤を基材上に塗工し、乾燥することで形成できる。または、粘着剤を剥離性シート上に塗工し、乾燥して粘着剤層を形成した後、基材を貼り合わせることで形成できる。なお粘着剤層の基材と接しない面に剥離性シートを貼り合わせることはいうまでもない。 The pressure-sensitive adhesive sheet of the present invention preferably includes a base material and a pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive of the present invention. Moreover, as another aspect, the double-sided adhesive sheet which has an adhesive layer on both surfaces of a core material, or the cast adhesive sheet which did not have a base material and a core material but was comprised only by the adhesive layer is also preferable. The pressure-sensitive adhesive layer can be formed by applying a pressure-sensitive adhesive on a substrate and drying it. Alternatively, it can be formed by applying a pressure-sensitive adhesive on a peelable sheet, drying to form a pressure-sensitive adhesive layer, and then bonding the base materials together. Needless to say, the peelable sheet is bonded to the surface of the pressure-sensitive adhesive layer that does not contact the substrate.
前記粘着剤を塗工する際に、溶液重合で説明した溶剤を添加して粘度を調整することができる。 When the adhesive is applied, the viscosity can be adjusted by adding the solvent described in the solution polymerization.
前記基材は、例えばセロハン、プラスチック、ゴム、発泡体、布帛、ゴムびき布、樹脂含浸布、ガラス、および木材等が好ましい。基材の形状は、板状およびフィルム状を選択できるが、取り扱いが容易であるフィルム状が好ましい。基材は、単独または２種以上の積層体を使用できる。 The base material is preferably, for example, cellophane, plastic, rubber, foam, cloth, rubber cloth, resin-impregnated cloth, glass, wood or the like. The shape of the substrate can be selected from a plate shape and a film shape, but a film shape that is easy to handle is preferable. The substrate can be used alone or in combination of two or more.
前記プラスチックは、例えばポリビニルアルコール、トリアセチルセルロース、ポリプロピレン、ポリエチレン、ポリシクロオレフィン、エチレン−酢酸ビニル共重合体等のポリオレフィン；ポリエチレンテレフタレート、ポリブチレンテレフタレート、およびポリエチレンナフタレート等のポリエステル、ポリカーボネート、ポリノルボルネン、ポリアリレート、ポリアクリル、ポリフェニレンサルファイドム、ポリスチレン、ポリアミド、およびポリイミド；等が挙げられる。 Examples of the plastic include polyolefins such as polyvinyl alcohol, triacetyl cellulose, polypropylene, polyethylene, polycycloolefin, and ethylene-vinyl acetate copolymer; polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polycarbonate, and polynorbornene. , Polyarylate, polyacryl, polyphenylene sulfide, polystyrene, polyamide, and polyimide; and the like.
粘着剤の塗工方法は、特に制限は無く、例えばマイヤーバー、アプリケーター、刷毛、スプレー、ローラー、グラビアコーター、ダイコーター、リップコーター、コンマコーター、ナイフコーター、リバースコ−ター、およびスピンコーター等が挙げられる。塗工に際して乾燥工程を行うことが好ましい。乾燥装置は、特に制限は無く、例えば熱風乾燥機、赤外線ヒーターおよび減圧法等がが挙げられる。乾燥温度は、通常６０〜１６０℃程度である。 The method of applying the adhesive is not particularly limited, and examples thereof include Mayer bar, applicator, brush, spray, roller, gravure coater, die coater, lip coater, comma coater, knife coater, reverse coater, and spin coater. It is done. It is preferable to perform a drying process at the time of coating. The drying device is not particularly limited, and examples thereof include a hot air dryer, an infrared heater, and a pressure reduction method. The drying temperature is usually about 60 to 160 ° C.
粘着剤層の厚さは、０．１〜３００μｍが好ましく、１〜１００μｍがより好ましい。０．１〜３００μｍの範囲にあることで粘着物性を適切な範囲に調整できる。 0.1-300 micrometers is preferable and, as for the thickness of an adhesive layer, 1-100 micrometers is more preferable. The adhesive physical property can be adjusted to an appropriate range by being in the range of 0.1 to 300 μm.
本発明の粘着シートの粘着剤層は、そのゲル分率が２５〜７０重量％であることが好ましく、３０〜６５重量％がより好ましい。ゲル分率が２５〜７０重量％であることで、密着性、凝集力をより高いレベルで両立できる。なお、本発明でゲル分率は、所定の大きさの粘着シートをＳＵＳメッシュ（目開き：０．０７７ｍｍ、線径：０．０５ｍｍ）に貼り付けた後、酢酸エチルに浸漬し、５０℃で２４時間抽出した後、１００℃で３０分乾燥後、下記数式（１）で算出した数値である。
数式（１） ゲル分率（重量％）＝（Ｇ２／Ｇ１）×１００
Ｇ１：酢酸エチルで抽出する前の粘着剤層の重量
Ｇ２：酢酸エチルで抽出・乾燥した後の粘着剤層の重量
As for the adhesive layer of the adhesive sheet of this invention, it is preferable that the gel fraction is 25 to 70 weight%, and 30 to 65 weight% is more preferable. When the gel fraction is 25 to 70% by weight, both adhesion and cohesion can be achieved at a higher level. In the present invention, the gel fraction is determined by attaching a pressure-sensitive adhesive sheet of a predetermined size to a SUS mesh (aperture: 0.077 mm, wire diameter: 0.05 mm) and then immersing in ethyl acetate at 50 ° C. It is a numerical value calculated by the following formula (1) after being extracted for 24 hours and then dried at 100 ° C. for 30 minutes.
Formula (1) Gel fraction (% by weight) = (G2 / G1) × 100
G1: Weight of the pressure-sensitive adhesive layer before extraction with ethyl acetate
G2: Weight of the pressure-sensitive adhesive layer after extraction and drying with ethyl acetate
本発明の粘着シートは、ポリオレフィンを始めとするプラスチック、ガラス、ダンボール、および金属等といった高極性から低極性まで被着体を選ばずに様々な用途で使用できる。具体的には、化粧品容器、シャンプー等のトイレタリー容器、医薬品容器、食品容器、飲料容器等のプラスチック容器、各種容器用ガラス瓶、窓ガラス、ディスプレイ用ガラス、梱包用ダンボール、および各種容器用途の金属缶等が挙げられる。 The pressure-sensitive adhesive sheet of the present invention can be used for various applications from high polarity to low polarity, such as polyolefin, plastic, glass, cardboard, metal and the like. Specifically, cosmetic containers, toiletries such as shampoo, plastic containers such as pharmaceutical containers, food containers, and beverage containers, glass bottles for various containers, window glass, display glass, cardboard for packaging, and metal cans for various containers Etc.
次に本発明の実施例を示して更に詳細を説明するが、本発明はこれらによって限定されるものではない。例中、「部」とは「重量部」、「％」とは「重量％」をそれぞれ意味するものとする。 EXAMPLES Next, although an Example of this invention is shown and it demonstrates still in detail, this invention is not limited by these. In the examples, “part” means “part by weight”, and “%” means “% by weight”.
［アクリル系重合体の合成］
（合成例１）
撹拌機、温度計、還流冷却管、滴下装置、窒素導入管を備えた反応容器（以下、単に「反応容器」と記述する。）に窒素雰囲気下、アクリル酸ブチル８４部、アクリル酸４部、メタクリル酸ブチル１２部、酢酸エチル７０部、２，２'−アゾビスイソブチロニトリル（以下「ＡＩＢＮ」と記述する。）０．０１５部を仕込んだ。撹拌しながら加熱を行い重合反応の開始を確認して還流温度で２時間反応した。次いで、ＡＩＢＮ ０．０３部を反応溶液に添加し６時間反応を継続した。その後、反応容器を冷却し酢酸エチル１３０部を加え、重量平均分子量１０４万のアクリル系共重合体溶液を得た。
[Synthesis of acrylic polymer]
(Synthesis Example 1)
In a nitrogen atmosphere, 84 parts of butyl acrylate, 4 parts of acrylic acid in a reaction vessel (hereinafter simply referred to as “reaction vessel”) equipped with a stirrer, thermometer, reflux condenser, dropping device, and nitrogen introduction tube 12 parts of butyl methacrylate, 70 parts of ethyl acetate, and 0.015 part of 2,2′-azobisisobutyronitrile (hereinafter referred to as “AIBN”) were charged. The mixture was heated with stirring to confirm the start of the polymerization reaction, and reacted at reflux temperature for 2 hours. Next, 0.03 part of AIBN was added to the reaction solution, and the reaction was continued for 6 hours. Thereafter, the reaction vessel was cooled and 130 parts of ethyl acetate was added to obtain an acrylic copolymer solution having a weight average molecular weight of 1,040,000.
（合成例２）
反応容器に窒素雰囲気下、アクリル酸ブチル８８部、アクリル酸４部、メタクリル酸ブチル８部、酢酸エチル１５０部、ＡＩＢＮ ０．０３部を仕込んだ。撹拌しながら加熱を行い重合反応の開始を確認して還流温度で２時間反応した。次いで、ＡＩＢＮ ０．０３部を反応溶液に添加し６時間反応を継続した。その後、反応容器を冷却し酢酸エチル５０部を加え、重量平均分子量７２万のアクリル系共重合体溶液を得た。
(Synthesis Example 2)
In a nitrogen atmosphere, 88 parts of butyl acrylate, 4 parts of acrylic acid, 8 parts of butyl methacrylate, 150 parts of ethyl acetate, and 0.03 part of AIBN were charged in a reaction vessel. The mixture was heated with stirring to confirm the start of the polymerization reaction, and reacted at reflux temperature for 2 hours. Next, 0.03 part of AIBN was added to the reaction solution, and the reaction was continued for 6 hours. Thereafter, the reaction vessel was cooled and 50 parts of ethyl acetate was added to obtain an acrylic copolymer solution having a weight average molecular weight of 720,000.
（合成例２〜１８）
モノマーの種類及び配合量を表１の記載に従った他は、合成例２と同様に行うことで合成例２〜１８の重合体を得た。
(Synthesis Examples 2 to 18)
The polymers of Synthesis Examples 2 to 18 were obtained in the same manner as in Synthesis Example 2 except that the types and blending amounts of the monomers were as described in Table 1.
得られた共重合体溶液について、溶液の外観、重量平均分子量を以下の方法に従って求めた。その結果を表１に示す。 About the obtained copolymer solution, the external appearance of the solution and the weight average molecular weight were calculated | required in accordance with the following method. The results are shown in Table 1.
＜溶液外観＞
得られたアクリル系共重合体溶液の外観を目視で評価した。
<Appearance of solution>
The appearance of the obtained acrylic copolymer solution was visually evaluated.
＜重量平均分子量の測定＞
重量平均分子量の測定はＧＰＣを用いた。ＧＰＣは溶媒（ＴＨＦ；テトラヒドロフラン）に溶解した物質をその分子サイズの差によって分離定量する液体クロマトグラフィーであり、重量平均分子量の決定はポリスチレン換算で行った。
装置名 ： 島津製作所製、ＬＣ−ＧＰＣシステム「Ｐｒｏｍｉｎｅｎｃｅ」
カラム ： 東ソー社製ＧＭＨＸＬ ４本、東ソー（株）製ＨＸＬ-Ｈ １本を直列に連結した。
移動相溶媒 ： テトラヒドロフラン
流量 ： １．０ｍｌ／ｍｉｎ
カラム温度 ： ４０℃
<Measurement of weight average molecular weight>
GPC was used for the measurement of the weight average molecular weight. GPC is liquid chromatography in which a substance dissolved in a solvent (THF; tetrahydrofuran) is separated and quantified by the difference in molecular size, and the weight average molecular weight was determined in terms of polystyrene.
Device name: LC-GPC system “Prominence” manufactured by Shimadzu Corporation
Column: Four GTHXL manufactured by Tosoh Corporation and one HXL-H manufactured by Tosoh Corporation were connected in series.
Mobile phase solvent: Tetrahydrofuran Flow rate: 1.0 ml / min
Column temperature: 40 ° C
表１の略号を以下に記載する。
ＢＡ ： アクリル酸ブチル
ＡＡ ： アクリル酸
ＢＭＡ ： メタクリル酸ブチル
ＣＨＭＡ ： メタクリル酸シクロヘキシル
ＩＢＸＡ ： アクリル酸イソボルニル
ＳＴ ： スチレン
２ＥＨＡ ： アクリル酸２−エチルヘキシル
ＭＭＡ ： メタクリル酸メチル
ＨＥＡ ： アクリル酸２−ヒドロキシエチル
ＨＥＭＡ ： メタクリル酸２−ヒドロキシエチル
ＣＨＤＭＭＡ ： シクロヘキサンジメタノールモノアクリル酸エステル
Abbreviations in Table 1 are listed below.
BA: butyl acrylate AA: acrylic acid BMA: butyl methacrylate CHMA: cyclohexyl methacrylate IBXA: isobornyl acrylate ST: styrene 2EHA: 2-ethylhexyl acrylate MMA: methyl methacrylate HEA: 2-hydroxyethyl acrylate HEMA: methacryl Acid 2-hydroxyethyl CHDMMA: cyclohexanedimethanol monoacrylate
（実施例１）
合成例１で得られた共重合体溶液中の共重合体１００部に対して、硬化剤としてエポキシ化合物であるＴＥＴＲＡＤ−Ｘ（三菱ガス化学社製） ０．０３部（不揮発分換算）、粘着付与剤としてロジン系樹脂であるＡ−７５（荒川化学社製）を３５部配合し、更に溶剤として酢酸エチルを加えて不揮発分を３０％に調整して粘着剤を得た。
前記粘着剤を、厚さ３８μｍの剥離性シート（ポリエチレンテレフタレート製）上に、乾燥後の厚さが２５μｍになるようにコンマコーターで塗工を行い、１００℃で２分間乾燥することで粘着剤層を形成した。次いで、この粘着剤層に、厚さ５０μｍの基材（ポリエチレンテレフタレート製、以下、ＰＥＴシートという）を貼り合せ、温度２３℃相対湿度５０％の条件で１週間熟成することで「剥離性シート／粘着剤層／ＰＥＴシート」という構成の粘着シートを得た。
Example 1
For 100 parts of the copolymer in the copolymer solution obtained in Synthesis Example 1, 0.03 part (nonvolatile content conversion) of TETRAD-X (manufactured by Mitsubishi Gas Chemical Company), which is an epoxy compound as a curing agent, 35 parts of A-75 (manufactured by Arakawa Chemical Co., Ltd.), which is a rosin resin, was added as an imparting agent, and ethyl acetate was added as a solvent to adjust the nonvolatile content to 30% to obtain a pressure-sensitive adhesive.
The pressure-sensitive adhesive is coated on a 38 μm-thick peelable sheet (polyethylene terephthalate) with a comma coater so that the thickness after drying is 25 μm, and dried at 100 ° C. for 2 minutes. A layer was formed. Subsequently, a base material (made of polyethylene terephthalate, hereinafter referred to as a PET sheet) having a thickness of 50 μm was bonded to the pressure-sensitive adhesive layer and aged for 1 week under the condition of a temperature of 23 ° C. and a relative humidity of 50%. A pressure-sensitive adhesive sheet having a configuration of “pressure-sensitive adhesive layer / PET sheet” was obtained.
（実施例２〜１８、比較例１〜１２）
原料を表２、３の配合に従って変更した以外は実施例１と同様に行うことで実施例２〜１８および比較例１〜１２粘着シートを得た。
ただし、実施例１〜１０、１２〜１６、および１８は参考例である。
(Examples 2-18, Comparative Examples 1-12)
Except having changed the raw material according to the mixing | blending of Table 2, 3, it carried out similarly to Example 1, and obtained Examples 2-18 and Comparative Examples 1-12 adhesive sheet.
However, Examples 1 to 10, 12 to 16, and 18 are reference examples.
得られた粘着シートを以下の方法で評価した。結果を表２および表３に示す。 The obtained adhesive sheet was evaluated by the following methods. The results are shown in Table 2 and Table 3.
（１）粘着力
得られた粘着シートを幅２５ｍｍ・縦１５０ｍｍの大きさに準備した。２３℃、相対湿度５０％雰囲気下、前記粘着シートから剥離性シートを剥がして露出した粘着剤層をポリプロピレン（ＰＰ）板に貼り付け、２ｋｇロールで１往復圧着した２４時間放置した後に引張試験機を用いて１８０度方向に３００ｍｍ／分の速度で引き剥がす１８０°ピール試験において粘着力を測定し、下記の評価基準に基づいて評価を行った。（ＪＩＳ Ｚ０２３７：２０００に準拠）
◎：「粘着力が１６Ｎ以上であり、非常に良好。」
○：「粘着力が１３Ｎ以上１６Ｎ未満であり、良好。」
×：「粘着力が１３Ｎ未満であり、実用不可。」
上記同様にステンレス（ＳＵＳ）板に対して粘着力を測定し、下記の評価基準に基づいて評価を行った。
◎：「粘着力が１８Ｎ以上であり、非常に良好。」
○：「粘着力が１５Ｎ以上１８Ｎ未満であり、良好。」
×：「粘着力が１５Ｎ未満であり、実用不可。」
(1) Adhesive strength The obtained adhesive sheet was prepared in a size of 25 mm in width and 150 mm in length. In an atmosphere of 23 ° C. and 50% relative humidity, the peelable sheet was peeled off from the pressure-sensitive adhesive sheet, and the pressure-sensitive adhesive layer exposed was attached to a polypropylene (PP) plate, and was pressed once with a 2 kg roll for 24 hours. The adhesive strength was measured in a 180 ° peel test in which the film was peeled off at a rate of 300 mm / min in the direction of 180 ° using an evaluation, and evaluated based on the following evaluation criteria. (Conforms to JIS Z0237: 2000)
A: “Adhesive strength is 16 N or more and very good”
○: “Adhesive strength is 13N or more and less than 16N, which is good”
×: “Adhesive strength is less than 13N, impractical”
In the same manner as described above, the adhesive strength was measured on a stainless steel (SUS) plate, and evaluation was performed based on the following evaluation criteria.
A: “Adhesive strength is 18 N or more and very good”
○: “Adhesive strength is 15 N or more and less than 18 N, good”
×: “Adhesive strength is less than 15N, impractical”
（２）保持力
得られた粘着シートを幅２５ｍｍ・縦１５０ｍｍの大きさに準備した。前記粘着シートから剥離性シートを剥がして露出した粘着剤層を研磨した幅３０ｍｍ・縦１５０ｍｍのステンレス板の下端部幅２５ｍｍ・横２５ｍｍの部分に貼着し、２ｋｇロールで１往復圧着した後、８０℃雰囲気で粘着シートの下端部に１ｋｇの荷重をかけ、７万秒放置することで保持力を測定した（ＪＩＳ Ｚ０２３７：２０００に準拠）。評価は、粘着シート貼付面上端部が元の位置から下にずれた長さを測定した。
評価基準
○：「ずれた長さが０．５ｍｍ未満である。良好。」
×：「ずれた長さが０．５ｍｍ以上である。実用不可。」
(2) Holding power The obtained pressure-sensitive adhesive sheet was prepared in a size of 25 mm in width and 150 mm in length. After peeling off the peelable sheet from the pressure-sensitive adhesive sheet and pasting the exposed adhesive layer on a polished 30 mm wide and 150 mm long stainless steel plate with a lower end width of 25 mm and a width of 25 mm, and then reciprocating one time with a 2 kg roll, A 1 kg load was applied to the lower end of the pressure-sensitive adhesive sheet in an 80 ° C. atmosphere, and the holding power was measured by leaving it to stand for 70,000 seconds (according to JIS Z0237: 2000). Evaluation measured the length which the adhesive sheet sticking surface upper end part shifted | deviated below from the original position.
Evaluation criteria ○: “The shifted length is less than 0.5 mm. Good.”
×: “The shifted length is 0.5 mm or more. Impractical.”
（３）透明性
得られた粘着シートの粘着剤層の透明性を目視で評価した。粘着剤層の外観に関しては、下記 の３段階の評価基準に基づいて評価を行った。
○：「透明で良好である」
×：「粘着剤層は白化しており、実用不可である」
(3) Transparency The transparency of the pressure-sensitive adhesive layer of the obtained pressure-sensitive adhesive sheet was visually evaluated. The appearance of the pressure-sensitive adhesive layer was evaluated based on the following three evaluation criteria.
○: “Transparent and good”
×: “The pressure-sensitive adhesive layer is whitened and impractical”
（４）耐白化性
得られた粘着シートを幅２５ｍｍ・縦５０ｍｍの大きさに準備した。次いで２３℃、相対湿度 ５０％雰囲気下、前記粘着シートから剥離性シートを剥がしてガラス板に貼り付け、２ｋｇロー ルで１往復圧着し、「ガラス／粘着剤層／ＰＥＴシート」の積層体を得た。この積層体を２４時 間放置した後、６０℃相対湿度９５％の雰囲気下で１０日間放置した。その後、取り出した直後 の積層体の透明性を目視にて評価した。外観に関しては、下記の３段階の評価基準に基づいて評 価を行った。
○：「透明で良好である」
×：「粘着剤層は白化しており、実用不可」
(4) Whitening resistance The obtained pressure-sensitive adhesive sheet was prepared to have a width of 25 mm and a length of 50 mm. Next, in an atmosphere of 23 ° C. and 50% relative humidity, the peelable sheet is peeled off from the pressure-sensitive adhesive sheet and attached to a glass plate, followed by one reciprocal pressure bonding with a 2 kg roll to obtain a laminate of “glass / pressure-sensitive adhesive layer / PET sheet”. Obtained. This laminate was allowed to stand for 24 hours and then left for 10 days in an atmosphere of 60 ° C. and 95% relative humidity. Thereafter, the transparency of the laminate immediately after removal was visually evaluated. Appearance was evaluated based on the following three evaluation criteria.
○: “Transparent and good”
×: “The pressure-sensitive adhesive layer is whitened and cannot be used”
表２および表３の略号を以下に記載する。
ＴＥＴＲＡＤ−Ｘ ： Ｎ,Ｎ,Ｎ',Ｎ'−テトラグリシジル−ｍ−キシリレンジアミン（三菱ガス化学社製）
Ａｌキレート ： アルミニウムトリスアセチルアセトネート
アジリジン化合物 ： ２，２’−ビスヒドロキシメチルブタノール−トリス［３−（１−アジリジニル）プロピオネート］
ＴＤＩ／ＴＭＰ ： トリレンジイソシアネートのトリメチロールプロパンアダクト体
Ａ−７５ ： スーパーエステルＡ−７５（不均化ロジンのグリセリン及びジエチレングリコールエステル、軟化点７５℃、荒川化学社製）
ＰＨ ： ハリタックＰＨ（水添ロジンのペンタエリスリトールエステル、軟化点９７℃、ハリマ化成社製）
ＰＣＪ ： ハリタックＰＣＪ（重合ロジンのペンタエリスリトールエステル、軟化点１２３℃、ハリマ化成社製）
Ｔ−１３０ ： ＹＳポリスターＴ−１３０（ポリテルペン樹脂、軟化点１３０℃、ヤスハラケミカル社製）
Ｐ−１００ ： アルコンＰ−１００（脂環族炭化水素樹脂、軟化点１００℃、荒川化学社製）
Abbreviations in Table 2 and Table 3 are described below.
TETRAD-X: N, N, N ′, N′-tetraglycidyl-m-xylylenediamine (manufactured by Mitsubishi Gas Chemical Company)
Al chelate: Aluminum trisacetylacetonate Aziridine compound: 2,2′-bishydroxymethylbutanol-tris [3- (1-aziridinyl) propionate]
TDI / TMP: Trimethylolpropane adduct of tolylene diisocyanate A-75: Superester A-75 (glycerin and diethylene glycol ester of disproportionated rosin, softening point 75 ° C., manufactured by Arakawa Chemical Co., Ltd.)
PH: Halitac PH (hydrogenated rosin pentaerythritol ester, softening point 97 ° C., manufactured by Harima Chemicals)
PCJ: Halitack PCJ (pentaerythritol ester of polymerized rosin, softening point 123 ° C., manufactured by Harima Chemicals)
T-130: YS Polystar T-130 (polyterpene resin, softening point 130 ° C., manufactured by Yasuhara Chemical Co., Ltd.)
P-100: Alcon P-100 (alicyclic hydrocarbon resin, softening point 100 ° C., manufactured by Arakawa Chemical Co., Ltd.)
表２の実施例１〜１８に示すように本発明の粘着剤は、ポリオレフィン樹脂であるＰＰに対する粘着力、保持力、透明性、耐白化性に優れていることが分かる。これに対し、表３の比較例１〜１２では、いずれかの項目が不良となっており、実用上問題があったり、実用不可であることがわかる。 As shown in Examples 1 to 18 in Table 2, it can be seen that the pressure-sensitive adhesive of the present invention is excellent in adhesion, holding power, transparency, and whitening resistance to PP which is a polyolefin resin. On the other hand, in Comparative Examples 1 to 12 in Table 3, one of the items is defective, and it can be seen that there is a practical problem or impractical.
本発明の粘着剤は、透明性が良好で、ポリオレフィン樹脂に対して良好な粘着力を有しているために、特に透明ラベル用粘着剤として特に有用である。 The pressure-sensitive adhesive of the present invention is particularly useful as a pressure-sensitive adhesive for transparent labels because it has good transparency and has a good pressure-sensitive adhesive force to polyolefin resins.
Claims (3)
前記アクリル系共重合体が、アクリル酸ブチル６０〜９０重量％と、カルボキシル基含有モノマー１〜９．９重量％と、モノマー（Ｘ）０．５〜１８重量％と、ホモポリマーのガラス転移温度が１５℃以上である水酸基含有モノマー（但しモノマー（Ｘ）は除く）１〜２０重量％とを含むモノマー混合物を溶液重合してなり、
前記モノマー混合物１００重量％中、ホモポリマーのガラス転移温度が１５℃以上である水酸基含有モノマー（但しモノマー（Ｘ）は除く）と、モノマー（Ｘ）との合計量が２０重量％以下であり、
前記モノマー（Ｘ）が、ホモポリマーのガラス転移温度が１５℃以上、かつ２５℃の水１００ｍｌに対する溶解度が１ｇ未満である、粘着剤。 An acrylic copolymer, a rosin resin, and a curing agent;
The acrylic copolymer comprises 60 to 90% by weight of butyl acrylate, 1 to 9.9% by weight of a carboxyl group-containing monomer, 0.5 to 18 % by weight of monomer (X), and a glass transition temperature of a homopolymer. A monomer mixture containing 1 to 20% by weight of a hydroxyl group-containing monomer (except for the monomer (X)) having a temperature of 15 ° C. or higher;
In 100% by weight of the monomer mixture, the total amount of the hydroxyl group-containing monomer (except for the monomer (X)) having a glass transition temperature of 15 ° C. or higher and the monomer (X) is 20% by weight or less,
The pressure-sensitive adhesive, wherein the monomer (X) has a homopolymer glass transition temperature of 15 ° C. or higher and a solubility in 100 ml of water at 25 ° C. of less than 1 g.
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