JP2009173722A - Antistatic acrylic pressure-sensitive adhesive and antistatic pressure-sensitive adhesive film using the pressure-sensitive adhesive - Google Patents
Antistatic acrylic pressure-sensitive adhesive and antistatic pressure-sensitive adhesive film using the pressure-sensitive adhesive Download PDFInfo
- Publication number
- JP2009173722A JP2009173722A JP2008012100A JP2008012100A JP2009173722A JP 2009173722 A JP2009173722 A JP 2009173722A JP 2008012100 A JP2008012100 A JP 2008012100A JP 2008012100 A JP2008012100 A JP 2008012100A JP 2009173722 A JP2009173722 A JP 2009173722A
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- Prior art keywords
- group
- sensitive adhesive
- pressure
- substituent
- antistatic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000004820 Pressure-sensitive adhesive Substances 0.000 title claims abstract description 121
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 239000010408 film Substances 0.000 claims abstract description 56
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 41
- 150000001875 compounds Chemical class 0.000 claims abstract description 39
- 239000012788 optical film Substances 0.000 claims abstract description 28
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 24
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 20
- 125000000524 functional group Chemical group 0.000 claims abstract description 18
- 230000009477 glass transition Effects 0.000 claims abstract description 7
- 239000000178 monomer Substances 0.000 claims description 75
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 52
- 239000010410 layer Substances 0.000 claims description 47
- 125000001424 substituent group Chemical group 0.000 claims description 47
- 125000000217 alkyl group Chemical group 0.000 claims description 26
- 125000000623 heterocyclic group Chemical group 0.000 claims description 22
- 125000003118 aryl group Chemical group 0.000 claims description 16
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 8
- 125000004432 carbon atom Chemical group C* 0.000 claims description 7
- 125000000304 alkynyl group Chemical group 0.000 claims description 6
- 125000003342 alkenyl group Chemical group 0.000 claims description 5
- 229910001413 alkali metal ion Inorganic materials 0.000 claims description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 4
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical group C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 claims description 3
- RWRDLPDLKQPQOW-UHFFFAOYSA-N Pyrrolidine Chemical group C1CCNC1 RWRDLPDLKQPQOW-UHFFFAOYSA-N 0.000 claims description 3
- 125000003386 piperidinyl group Chemical group 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 abstract description 6
- 230000003068 static effect Effects 0.000 abstract description 6
- 150000001639 boron compounds Chemical class 0.000 abstract 1
- 239000010409 thin film Substances 0.000 abstract 1
- -1 D1 Chemical class 0.000 description 114
- 229910052757 nitrogen Inorganic materials 0.000 description 17
- 239000011521 glass Substances 0.000 description 16
- 239000012948 isocyanate Substances 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 16
- 239000004973 liquid crystal related substance Substances 0.000 description 12
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 11
- 238000005187 foaming Methods 0.000 description 11
- 239000003995 emulsifying agent Substances 0.000 description 10
- 239000000853 adhesive Substances 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 9
- 239000002216 antistatic agent Substances 0.000 description 9
- 150000002513 isocyanates Chemical class 0.000 description 9
- 239000003795 chemical substances by application Substances 0.000 description 8
- 239000003505 polymerization initiator Substances 0.000 description 8
- 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 7
- 239000006087 Silane Coupling Agent Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 229920005862 polyol Polymers 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000006116 polymerization reaction Methods 0.000 description 6
- KZNICNPSHKQLFF-UHFFFAOYSA-N succinimide Chemical compound O=C1CCC(=O)N1 KZNICNPSHKQLFF-UHFFFAOYSA-N 0.000 description 6
- 229910052783 alkali metal Inorganic materials 0.000 description 5
- 230000001588 bifunctional effect Effects 0.000 description 5
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 150000003077 polyols Chemical class 0.000 description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 4
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- 229910052796 boron Inorganic materials 0.000 description 4
- 239000012986 chain transfer agent Substances 0.000 description 4
- 238000005336 cracking Methods 0.000 description 4
- 239000003431 cross linking reagent Substances 0.000 description 4
- 210000002858 crystal cell Anatomy 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical compound OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- XLPJNCYCZORXHG-UHFFFAOYSA-N 1-morpholin-4-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCOCC1 XLPJNCYCZORXHG-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 3
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 3
- 239000012790 adhesive layer Substances 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
- 125000003438 dodecyl group Chemical group [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])* 0.000 description 3
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 3
- 238000005227 gel permeation chromatography Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 150000002978 peroxides Chemical class 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 230000003405 preventing effect Effects 0.000 description 3
- 229910000077 silane Inorganic materials 0.000 description 3
- 229960002317 succinimide Drugs 0.000 description 3
- 125000001544 thienyl group Chemical group 0.000 description 3
- 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 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 3
- RESPXSHDJQUNTN-UHFFFAOYSA-N 1-piperidin-1-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCCCC1 RESPXSHDJQUNTN-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
- KANZWHBYRHQMKZ-UHFFFAOYSA-N 2-ethenylpyrazine Chemical compound C=CC1=CN=CC=N1 KANZWHBYRHQMKZ-UHFFFAOYSA-N 0.000 description 2
- HFCUBKYHMMPGBY-UHFFFAOYSA-N 2-methoxyethyl prop-2-enoate Chemical compound COCCOC(=O)C=C HFCUBKYHMMPGBY-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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920002284 Cellulose triacetate Polymers 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000005058 Isophorone diisocyanate Substances 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical group O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 2
- 125000002252 acyl group Chemical group 0.000 description 2
- 125000004453 alkoxycarbonyl group Chemical group 0.000 description 2
- 125000005037 alkyl phenyl group Chemical group 0.000 description 2
- 125000004390 alkyl sulfonyl group Chemical group 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 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
- 125000005428 anthryl group Chemical group [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 description 2
- 125000005161 aryl oxy carbonyl group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000012662 bulk polymerization Methods 0.000 description 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001768 cations Chemical group 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 125000004093 cyano group Chemical group *C#N 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000000921 elemental analysis Methods 0.000 description 2
- 238000007720 emulsion polymerization reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 2
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 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
- 229920001519 homopolymer Polymers 0.000 description 2
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical group OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 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
- 238000005259 measurement Methods 0.000 description 2
- QYZFTMMPKCOTAN-UHFFFAOYSA-N n-[2-(2-hydroxyethylamino)ethyl]-2-[[1-[2-(2-hydroxyethylamino)ethylamino]-2-methyl-1-oxopropan-2-yl]diazenyl]-2-methylpropanamide Chemical compound OCCNCCNC(=O)C(C)(C)N=NC(C)(C)C(=O)NCCNCCO QYZFTMMPKCOTAN-UHFFFAOYSA-N 0.000 description 2
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 description 2
- 125000000018 nitroso group Chemical group N(=O)* 0.000 description 2
- 125000001037 p-tolyl group Chemical group [H]C1=C([H])C(=C([H])C([H])=C1*)C([H])([H])[H] 0.000 description 2
- 125000005561 phenanthryl group Chemical group 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 125000004193 piperazinyl group Chemical group 0.000 description 2
- 229920001223 polyethylene glycol Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000010526 radical polymerization reaction Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- JRMUNVKIHCOMHV-UHFFFAOYSA-M tetrabutylammonium bromide Chemical compound [Br-].CCCC[N+](CCCC)(CCCC)CCCC JRMUNVKIHCOMHV-UHFFFAOYSA-M 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- 125000005208 trialkylammonium group Chemical group 0.000 description 2
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 2
- 229920002554 vinyl polymer Polymers 0.000 description 2
- 125000005023 xylyl group Chemical group 0.000 description 2
- DGVVWUTYPXICAM-UHFFFAOYSA-N β‐Mercaptoethanol Chemical compound OCCS DGVVWUTYPXICAM-UHFFFAOYSA-N 0.000 description 2
- AURYLBASVGNSON-UHFFFAOYSA-N (2,5-dioxopyrrolidin-3-ylidene)methyl prop-2-enoate Chemical compound C=CC(=O)OC=C1CC(=O)NC1=O AURYLBASVGNSON-UHFFFAOYSA-N 0.000 description 1
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- AGKBXKFWMQLFGZ-UHFFFAOYSA-N (4-methylbenzoyl) 4-methylbenzenecarboperoxoate Chemical compound C1=CC(C)=CC=C1C(=O)OOC(=O)C1=CC=C(C)C=C1 AGKBXKFWMQLFGZ-UHFFFAOYSA-N 0.000 description 1
- NOBYOEQUFMGXBP-UHFFFAOYSA-N (4-tert-butylcyclohexyl) (4-tert-butylcyclohexyl)oxycarbonyloxy carbonate Chemical compound C1CC(C(C)(C)C)CCC1OC(=O)OOC(=O)OC1CCC(C(C)(C)C)CC1 NOBYOEQUFMGXBP-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
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 description 1
- OVBFMUAFNIIQAL-UHFFFAOYSA-N 1,4-diisocyanatobutane Chemical compound O=C=NCCCCN=C=O OVBFMUAFNIIQAL-UHFFFAOYSA-N 0.000 description 1
- 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
- AYMDJPGTQFHDSA-UHFFFAOYSA-N 1-(2-ethenoxyethoxy)-2-ethoxyethane Chemical compound CCOCCOCCOC=C AYMDJPGTQFHDSA-UHFFFAOYSA-N 0.000 description 1
- DKJBREHOVWISMR-UHFFFAOYSA-N 1-chloro-2,3-diisocyanatobenzene Chemical compound ClC1=CC=CC(N=C=O)=C1N=C=O DKJBREHOVWISMR-UHFFFAOYSA-N 0.000 description 1
- OGNSDRMLWYNUED-UHFFFAOYSA-N 1-cyclohexyl-4-[4-[4-(4-cyclohexylcyclohexyl)cyclohexyl]cyclohexyl]cyclohexane Chemical group C1CCCCC1C1CCC(C2CCC(CC2)C2CCC(CC2)C2CCC(CC2)C2CCCCC2)CC1 OGNSDRMLWYNUED-UHFFFAOYSA-N 0.000 description 1
- BQTPKSBXMONSJI-UHFFFAOYSA-N 1-cyclohexylpyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1CCCCC1 BQTPKSBXMONSJI-UHFFFAOYSA-N 0.000 description 1
- UBPXWZDJZFZKGH-UHFFFAOYSA-N 1-ethenyl-3-methylpyrrolidin-2-one Chemical compound CC1CCN(C=C)C1=O UBPXWZDJZFZKGH-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
- OSSNTDFYBPYIEC-UHFFFAOYSA-N 1-ethenylimidazole Chemical compound C=CN1C=CN=C1 OSSNTDFYBPYIEC-UHFFFAOYSA-N 0.000 description 1
- DCRYNQTXGUTACA-UHFFFAOYSA-N 1-ethenylpiperazine Chemical compound C=CN1CCNCC1 DCRYNQTXGUTACA-UHFFFAOYSA-N 0.000 description 1
- PBGPBHYPCGDFEZ-UHFFFAOYSA-N 1-ethenylpiperidin-2-one Chemical compound C=CN1CCCCC1=O PBGPBHYPCGDFEZ-UHFFFAOYSA-N 0.000 description 1
- 125000006219 1-ethylpentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C([H])([H])[H] 0.000 description 1
- CSCSROFYRUZJJH-UHFFFAOYSA-N 1-methoxyethane-1,2-diol Chemical compound COC(O)CO CSCSROFYRUZJJH-UHFFFAOYSA-N 0.000 description 1
- 125000001637 1-naphthyl group Chemical group [H]C1=C([H])C([H])=C2C(*)=C([H])C([H])=C([H])C2=C1[H] 0.000 description 1
- HIDBROSJWZYGSZ-UHFFFAOYSA-N 1-phenylpyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC=C1 HIDBROSJWZYGSZ-UHFFFAOYSA-N 0.000 description 1
- WLPAQAXAZQUXBG-UHFFFAOYSA-N 1-pyrrolidin-1-ylprop-2-en-1-one Chemical compound C=CC(=O)N1CCCC1 WLPAQAXAZQUXBG-UHFFFAOYSA-N 0.000 description 1
- VIUDSFQSAFAVGV-UHFFFAOYSA-N 10-triethoxysilyldecyl 2-methylprop-2-enoate Chemical compound CCO[Si](OCC)(OCC)CCCCCCCCCCOC(=O)C(C)=C VIUDSFQSAFAVGV-UHFFFAOYSA-N 0.000 description 1
- ZZXDHSIJYPCDOM-UHFFFAOYSA-N 10-triethoxysilyldecyl prop-2-enoate Chemical compound CCO[Si](OCC)(OCC)CCCCCCCCCCOC(=O)C=C ZZXDHSIJYPCDOM-UHFFFAOYSA-N 0.000 description 1
- BXBOUPUNKULVKB-UHFFFAOYSA-N 10-trimethoxysilyldecyl 2-methylprop-2-enoate Chemical compound CO[Si](OC)(OC)CCCCCCCCCCOC(=O)C(C)=C BXBOUPUNKULVKB-UHFFFAOYSA-N 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
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- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- JFNLZVQOOSMTJK-KNVOCYPGSA-N norbornene Chemical compound C1[C@@H]2CC[C@H]1C=C2 JFNLZVQOOSMTJK-KNVOCYPGSA-N 0.000 description 1
- 125000003261 o-tolyl group Chemical group [H]C1=C([H])C(*)=C(C([H])=C1[H])C([H])([H])[H] 0.000 description 1
- SRSFOMHQIATOFV-UHFFFAOYSA-N octanoyl octaneperoxoate Chemical compound CCCCCCCC(=O)OOC(=O)CCCCCCC SRSFOMHQIATOFV-UHFFFAOYSA-N 0.000 description 1
- 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 1
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- 125000003933 pentacenyl group Chemical group C1(=CC=CC2=CC3=CC4=CC5=CC=CC=C5C=C4C=C3C=C12)* 0.000 description 1
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- 125000004437 phosphorous atom Chemical group 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 125000004592 phthalazinyl group Chemical group C1(=NN=CC2=CC=CC=C12)* 0.000 description 1
- 125000001388 picenyl group Chemical group C1(=CC=CC2=CC=C3C4=CC=C5C=CC=CC5=C4C=CC3=C21)* 0.000 description 1
- 125000000587 piperidin-1-yl group Chemical group [H]C1([H])N(*)C([H])([H])C([H])([H])C([H])([H])C1([H])[H] 0.000 description 1
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- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
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- 239000001294 propane Substances 0.000 description 1
- AAYRWMCIKCRHIN-UHFFFAOYSA-N propane-1-sulfonic acid;prop-2-enamide Chemical compound NC(=O)C=C.CCCS(O)(=O)=O AAYRWMCIKCRHIN-UHFFFAOYSA-N 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
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- 125000005493 quinolyl group Chemical group 0.000 description 1
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- 150000003254 radicals Chemical class 0.000 description 1
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- 239000012966 redox initiator Substances 0.000 description 1
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- 238000012552 review Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 235000010378 sodium ascorbate Nutrition 0.000 description 1
- PPASLZSBLFJQEF-RKJRWTFHSA-M sodium ascorbate Substances [Na+].OC[C@@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RKJRWTFHSA-M 0.000 description 1
- 229960005055 sodium ascorbate Drugs 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- PPASLZSBLFJQEF-RXSVEWSESA-M sodium-L-ascorbate Chemical compound [Na+].OC[C@H](O)[C@H]1OC(=O)C(O)=C1[O-] PPASLZSBLFJQEF-RXSVEWSESA-M 0.000 description 1
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- 125000000020 sulfo group Chemical group O=S(=O)([*])O[H] 0.000 description 1
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- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
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- 125000004434 sulfur atom Chemical group 0.000 description 1
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- 125000004213 tert-butoxy group Chemical group [H]C([H])([H])C(O*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- OPQYOFWUFGEMRZ-UHFFFAOYSA-N tert-butyl 2,2-dimethylpropaneperoxoate Chemical compound CC(C)(C)OOC(=O)C(C)(C)C OPQYOFWUFGEMRZ-UHFFFAOYSA-N 0.000 description 1
- NMOALOSNPWTWRH-UHFFFAOYSA-N tert-butyl 7,7-dimethyloctaneperoxoate Chemical compound CC(C)(C)CCCCCC(=O)OOC(C)(C)C NMOALOSNPWTWRH-UHFFFAOYSA-N 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
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- 125000003396 thiol group Chemical group [H]S* 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
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 1
- RKYSDIOEHLMYRS-UHFFFAOYSA-N triethoxy(hex-5-enyl)silane Chemical compound CCO[Si](OCC)(OCC)CCCCC=C RKYSDIOEHLMYRS-UHFFFAOYSA-N 0.000 description 1
- 239000013638 trimer Substances 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 1
- 125000001834 xanthenyl group Chemical group C1=CC=CC=2OC3=CC=CC=C3C(C12)* 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
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Landscapes
- Adhesive Tapes (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Polarising Elements (AREA)
Abstract
Description
本発明は、帯電防止性アクリル系感圧式接着剤および該感圧式接着剤を用いた帯電防止性感圧式接着フィルムに関する。詳しくは、本発明は、ガラス等の被着体に光学フィルムを貼着する際に好適に用いられる感圧式接着剤に関する。さらに、詳しくは、感圧式接着層が薄くても耐久性に優れる、光学フィルム貼着用の感圧式接着剤に関する。また、光学フィルムの少なくとも片面に感圧式接着層を有する感圧式接着層フィルムに関する。 The present invention relates to an antistatic acrylic pressure-sensitive adhesive and an antistatic pressure-sensitive adhesive film using the pressure-sensitive adhesive. Specifically, the present invention relates to a pressure-sensitive adhesive that is suitably used when an optical film is attached to an adherend such as glass. More specifically, the present invention relates to a pressure-sensitive adhesive for attaching an optical film, which is excellent in durability even if the pressure-sensitive adhesive layer is thin. The present invention also relates to a pressure-sensitive adhesive layer film having a pressure-sensitive adhesive layer on at least one side of the optical film.
液晶ディスプレイ等は、その画像形成方式から液晶セルの両側に偏光素子を配置することが必要不可欠であり、一般的には偏光板が貼着されている。また液晶パネルには偏光板の他に、ディスプレイの表示品位を向上させるために様々な光学素子が用いられるようになってきている。例えば、着色防止としての位相差板、液晶ディスプレイの視野角を改善するための視野角拡大フィルム、さらにはディスプレイのコントラストを高めるための輝度向上フィルム等が用いられる。これらのフィルムは総称して光学フィルムと呼ばれる。 In a liquid crystal display or the like, it is indispensable to dispose polarizing elements on both sides of a liquid crystal cell because of its image forming method, and generally a polarizing plate is attached. In addition to polarizing plates, various optical elements have been used for liquid crystal panels in order to improve the display quality of displays. For example, a retardation plate for preventing coloring, a viewing angle widening film for improving the viewing angle of a liquid crystal display, and a brightness enhancement film for increasing the contrast of the display are used. These films are collectively called optical films.
前記光学フィルムは、感圧式接着剤を用いて、被着体(液晶セルを構成しているガラスや他の光学フィルム)に貼着される。具体的には、各種光学フィルム/感圧式接着剤層/剥離シートという積層状態にある、感圧式接着フィルムから感圧式接着剤層表面を覆っていた剥離シートが剥がされ、感圧式接着剤層を介して偏光フィルムや位相差フィルム等が被着体である液晶セルガラス等に貼着される。
剥離シートを剥離する際、静電気が生じる可能性があり、その静電気によって、貼着時に埃やクズを吸引してしまい、異物混入という貼着状態の不具合欠点を引き起こしたり、被着体内部に封止されている液晶や電子回路が損傷を受ける可能性がある。
The optical film is attached to an adherend (glass or other optical film constituting a liquid crystal cell) using a pressure-sensitive adhesive. Specifically, the release sheet covering the surface of the pressure-sensitive adhesive layer was peeled off from the pressure-sensitive adhesive film in a laminated state of various optical films / pressure-sensitive adhesive layers / release sheets, and the pressure-sensitive adhesive layer was removed. Then, a polarizing film, a retardation film or the like is attached to a liquid crystal cell glass which is an adherend.
When peeling off the release sheet, static electricity may be generated, and the static electricity sucks dust and debris at the time of sticking. Liquid crystals and electronic circuits that are stopped may be damaged.
さらに、偏光フィルムや位相差フィルム等を被着体である液晶セルガラス等に貼着した後、検品工程において、貼着状態の不具合(貼着時のエアーや粉塵の巻き込み等)が発見された場合、ガラス等から偏光フィルムや位相差フィルムが剥がされ、新たな偏光フィルムや位相差フィルムが貼着される。この貼り直し作業のことを「リワーク」という。
リワークの際にも静電気が生じる可能性があり、その静電気によって、液晶や電子回路が損傷を受ける可能性がある。
Furthermore, after sticking a polarizing film or retardation film to the adherend liquid crystal cell glass, etc., in the inspection process, problems with the sticking state (such as air or dust trapping during sticking) were discovered. In such a case, the polarizing film or retardation film is peeled off from glass or the like, and a new polarizing film or retardation film is attached. This re-pasting operation is called “rework”.
Static electricity may be generated during rework, and the liquid crystal and electronic circuits may be damaged by the static electricity.
また、感圧式接着剤付きフィルムが適用される液晶表示装置等の画像表示装置は様々な環境下において用いられる。そのため、感圧式接着剤層付き光学フィルムには、貼着後、高温環境下における耐熱性、高湿環境下における耐湿性等の耐久性を有することが望まれる。
かかる耐久性改善を課題とする様々な感圧式接着剤が提案されている(特許文献1〜7参照)。
In addition, image display devices such as liquid crystal display devices to which a film with a pressure-sensitive adhesive is applied are used in various environments. Therefore, the optical film with a pressure-sensitive adhesive layer is desired to have durability such as heat resistance under a high temperature environment and moisture resistance under a high humidity environment after being attached.
Various pressure-sensitive adhesives have been proposed for improving the durability (see Patent Documents 1 to 7).
一方、近年、画像表示装置は薄型化が望まれており、感圧式接着剤層付き光学フィルムにも薄型化が望まれている。そこで、感圧式接着剤層付き光学フィルムを構成する感圧式接着剤層についても薄型化が求められている。しかし、感圧式接着剤層を薄型化すると、耐久性を満足することが難しくなる。特許文献1〜7に記載される感圧式接着剤を用いた場合においても、感圧式接着剤層が薄くなると耐久性を満足できなくなる。
本発明は、剥離シートを剥離する際やリワークの際に静電気を発生しにくい、感圧式接着剤層付き光学フィルムであって、感圧式接着剤層を薄くしても耐久性を満足することができる帯電防止性感圧式接着剤層付き光学フィルムを提供すること、及び該感圧式接着フィルムを形成し得る帯電防止性感圧式接着剤を提供することを目的とする。 The present invention is an optical film with a pressure-sensitive adhesive layer that hardly generates static electricity when peeling a release sheet or during rework, and can satisfy durability even if the pressure-sensitive adhesive layer is thinned. It is an object of the present invention to provide an optical film with an antistatic pressure-sensitive adhesive layer that can be formed, and to provide an antistatic pressure-sensitive adhesive that can form the pressure-sensitive adhesive film.
本発明は、アクリル系ポリマー(A)と、水酸基もしくはカルボキシル基と反応し得る官能基を有する化合物(B)と、化合物(D1)もしくは化合物(D2)とを含有する帯電防止性アクリル系感圧式接着剤であって、
上記アクリル系ポリマー(A)が、少なくとも、アルキル(メタ)アクリレート(a1):83〜96重量%、複素環及び重合性官能基含有モノマー(a2):0〜10重量%、水酸基含有モノマー(a3):0.05〜10重量%、カルボキシル基含有モノマー:0.5〜7重量%(a4)を共重合してなる、ガラス転移温度が−60〜0℃であって、重量平均分子量が160万以上280万未満であり、上記化合物(D1)が下記一般式(1)で表され、上記化合物(D2)が下記一般式(2)で表される、ことを特徴とする帯電防止性アクリル系感圧式接着剤。
The present invention relates to an antistatic acrylic pressure-sensitive type containing an acrylic polymer (A), a compound (B) having a functional group capable of reacting with a hydroxyl group or a carboxyl group, and a compound (D1) or a compound (D2). An adhesive,
The acrylic polymer (A) is at least alkyl (meth) acrylate (a1): 83 to 96 wt%, heterocyclic and polymerizable functional group-containing monomer (a2): 0 to 10 wt%, hydroxyl group-containing monomer (a3 ): 0.05 to 10% by weight, carboxyl group-containing monomer: 0.5 to 7% by weight (a4) copolymerized, glass transition temperature is −60 to 0 ° C., and weight average molecular weight is 160. An antistatic acrylic characterized in that the compound (D1) is represented by the following general formula (1) and the compound (D2) is represented by the following general formula (2): Pressure sensitive adhesive.
第2の発明は、複素環及び重合性官能基含有モノマー(a2)が、複素環として、モルホリン環、ピペリジン環またはピロリジン環を有することを特徴とする第1の発明記載の帯電防止性アクリル系感圧式接着剤に関する。 The second invention is characterized in that the heterocyclic ring and polymerizable functional group-containing monomer (a2) has a morpholine ring, piperidine ring or pyrrolidine ring as the heterocyclic ring, and the antistatic acrylic system according to the first invention It relates to a pressure-sensitive adhesive.
第3の発明は、ヒドロキシ基含有モノマーが、ヒドロキシアルキル(メタ)アクリレートであることを特徴とする第1又は第2の発明記載の帯電防止性アクリル系感圧式接着剤に関する。 A third invention relates to the antistatic acrylic pressure-sensitive adhesive according to the first or second invention, wherein the hydroxy group-containing monomer is hydroxyalkyl (meth) acrylate.
第4の発明は、ヒドロキシアルキル(メタ)アクリレートのアルキル鎖の炭素数が3〜20であることを特徴とする第1ないし第3の発明いずれか記載の帯電防止性アクリル系感圧式接着剤に関する。 The fourth invention relates to the antistatic acrylic pressure-sensitive adhesive according to any one of the first to third inventions, wherein the alkyl chain of hydroxyalkyl (meth) acrylate has 3 to 20 carbon atoms. .
第5の発明は、R1〜R4が、それぞれ独立に、置換基を有してもよいアルキル基、または、置換基を有してもよいアリール基である第1ないし第4の発明いずれか記載の帯電防止性アクリル系感圧式接着剤に関する。 In the fifth invention, any of the first to fourth inventions, wherein R 1 to R 4 are each independently an alkyl group which may have a substituent or an aryl group which may have a substituent. Or an antistatic acrylic pressure-sensitive adhesive.
第6の発明は、R1〜R4が、それぞれ独立に、置換基を有してもよいアリール基である第1ないし第5の発明いずれか記載の帯電防止性アクリル系感圧式接着剤に関する。 The sixth invention relates to the antistatic acrylic pressure-sensitive adhesive according to any one of the first to fifth inventions, wherein R 1 to R 4 are each independently an aryl group which may have a substituent. .
第7の発明は、R5〜R8が、それぞれ独立に、置換基を有してもよいアルキル基である第1ないし第6の発明いずれか記載の帯電防止性アクリル系感圧式接着剤に関する。 The seventh invention relates to the antistatic acrylic pressure-sensitive adhesive according to any one of the first to sixth inventions, wherein R 5 to R 8 are each independently an alkyl group which may have a substituent. .
第8の発明は、第1ないし第7の発明いずれか記載の帯電防止性アクリル系感圧式接着剤から形成される帯電防止性アクリル系感圧式接着層が、偏光フィルム、位相差フィルムからなる群より選ばれる光学フィルムの少なくとも片面に設けられていることを特徴とする帯電防止性アクリル系感圧式接着フィルムに関する。 The eighth invention is a group in which the antistatic acrylic pressure-sensitive adhesive layer formed from the antistatic acrylic pressure-sensitive adhesive according to any one of the first to seventh inventions comprises a polarizing film and a retardation film. The present invention relates to an antistatic acrylic pressure-sensitive adhesive film which is provided on at least one side of an optical film selected from the above.
本発明の感圧式接着剤によれば、剥離シート及びガラス基板などの被着体から感圧式接着剤層を剥がす際に帯電し難い感圧式接着フィルムであって、感圧式接着剤層を薄くしても、各種光学フィルムを偏光フィルム等のガラス板等の被着体に貼着後の耐久性に優れる、感圧式接着フィルムを提供できる。 The pressure-sensitive adhesive of the present invention is a pressure-sensitive adhesive film that is difficult to be charged when the pressure-sensitive adhesive layer is peeled off from an adherend such as a release sheet and a glass substrate, and the pressure-sensitive adhesive layer is thinned. However, it is possible to provide a pressure-sensitive adhesive film that is excellent in durability after adhering various optical films to an adherend such as a polarizing plate.
本発明の帯電防止性アクリル系感圧式接着剤は、水酸基もしくはカルボキシル基を有するアクリル系ポリマー(A)と、水酸基もしくはカルボキシル基と反応し得る官能基を有する化合物(B)と、帯電防止付与剤として機能する化合物(D1)もしくは化合物(D2)とを含有する。 The antistatic acrylic pressure-sensitive adhesive of the present invention comprises an acrylic polymer (A) having a hydroxyl group or a carboxyl group, a compound (B) having a functional group capable of reacting with a hydroxyl group or a carboxyl group, and an antistatic agent. As a compound (D1) or a compound (D2).
本発明の帯電防止性アクリル系感圧式接着剤において、いわゆるベースポリマーとして用いられる、水酸基もしくはカルボキシル基を有するアクリル系ポリマー(A)について説明する。
アクリル系ポリマー(A)は、アルキル(メタ)アクリレート(a1):83〜96重量%、複素環及び重合性官能基含有モノマー(a2):0〜10重量%、水酸基含有モノマー(a3):0.05〜10重量%、カルボキシル基含有モノマー:0.5〜7重量%(a4)を共重合してなる含有してなるものであり、ガラス転移温度が−60〜0℃であって、重量平均分子量が160万以上280万未満である。このような高分子量のアクリル系ポリマー(A)を用いることで、感圧式接着剤層が薄型化した場合においても、耐熱性、耐湿性等の耐久性を満足させることができる。
The acrylic polymer (A) having a hydroxyl group or a carboxyl group used as a so-called base polymer in the antistatic acrylic pressure-sensitive adhesive of the present invention will be described.
The acrylic polymer (A) is alkyl (meth) acrylate (a1): 83 to 96% by weight, heterocyclic and polymerizable functional group-containing monomer (a2): 0 to 10% by weight, hydroxyl group-containing monomer (a3): 0 0.05 to 10% by weight, carboxyl group-containing monomer: 0.5 to 7% by weight (a4) copolymerized, glass transition temperature is −60 to 0 ° C. The average molecular weight is 1.6 million or more and less than 2.8 million. By using such a high molecular weight acrylic polymer (A), durability such as heat resistance and moisture resistance can be satisfied even when the pressure-sensitive adhesive layer is thinned.
アルキル(メタ)アクリレート(a1)は、アクリル系ポリマー(A)を構成するモノマーのうち量的には主モノマーとも言うべき成分である。
アルキル(メタ)アクリレート(a1)のアルキル基の炭素数は1〜12程度のものであることが好ましく、炭素数1〜9のアルキル(メタ)アクリレートが好ましい。アルキル(メタ)アクリレート(a1)の具体例としては、メチル(メタ)アクリレート、エチル(メタ)アクリレート、n−ブチル(メタ)アクリレート、2−エチルヘキシル(メタ)アクリレート、イソオクチル(メタ)アクリレート、イソノニル(メタ)アクリレート、ラウリル(メタ)アクリレート等を例示でき、これらは単独または組み合わせて使用できる。なお、(メタ)アクリレートはアクリレートおよび/またはメタクリレートをいい、モノマー(a2)(a3)(a4)についても同様である。
Alkyl (meth) acrylate (a1) is a component which should be called a main monomer quantitatively among the monomers constituting the acrylic polymer (A).
The alkyl group of the alkyl (meth) acrylate (a1) preferably has about 1 to 12 carbon atoms, and preferably an alkyl (meth) acrylate having 1 to 9 carbon atoms. Specific examples of the alkyl (meth) acrylate (a1) include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, isononyl ( Examples thereof include meth) acrylate and lauryl (meth) acrylate, and these can be used alone or in combination. (Meth) acrylate refers to acrylate and / or methacrylate, and the same applies to monomers (a2), (a3), and (a4).
複素環及び重合性官能基含有モノマー(a2)としては、重合性の官能基を有し、かつ複素環を有するものを特に制限なく用いることができる。重合性官能基は、(メタ)アクリロイル基、ビニルエーテル基等があげられる。これらのなかもで、(メタ)アクリロイル基が好適である。複素環としては、モルホリン環、ピペリジン環、ピロリジン環、ピペラジン環等があげられる。複素環含有アクリルモノマーとしては、例えば、N−アクリロイルモルホリン、N−アクリロイルピペリジン、N−メタクリロイルピペリジン、N−アクリロイルピロリジン等があげられる。これらのなかでも、N−アクリロイルモルホリンが好適である。
複素環及び重合性官能基含有モノマー(a2)の利用は、感圧式接着剤層を薄型化した場合における耐熱性、耐湿性等の耐久性を向上させる点で効果的ではある。しかし、その反面、複素環含有モノマー(a2)を共重合させることにより、形成されるアクリル系ポリマー(A)のTgを高くし、感圧式接着層のタックを低下させやすい。感圧式接着剤層のタックが低下すると、ガラス等の被着体を十分には濡らすことが難しくなり、追従性が低下する。貼着面積がさほど大きくない場合や、トリアセチルセルロースに比して収縮の小さい光学フィルムをガラス等の被着体に貼着する場合には、複素環含有モノマー(a2)を用いないアクリル系ポリマー(A)も使用し得る。
As the heterocyclic ring and polymerizable functional group-containing monomer (a2), those having a polymerizable functional group and having a heterocyclic ring can be used without particular limitation. Examples of the polymerizable functional group include a (meth) acryloyl group and a vinyl ether group. Of these, a (meth) acryloyl group is preferred. Examples of the heterocyclic ring include morpholine ring, piperidine ring, pyrrolidine ring, piperazine ring and the like. Examples of the heterocyclic ring-containing acrylic monomer include N-acryloylmorpholine, N-acryloylpiperidine, N-methacryloylpiperidine, N-acryloylpyrrolidine and the like. Of these, N-acryloylmorpholine is preferred.
Use of the heterocyclic ring and the polymerizable functional group-containing monomer (a2) is effective in improving durability such as heat resistance and moisture resistance when the pressure-sensitive adhesive layer is thinned. However, on the other hand, by copolymerizing the heterocycle-containing monomer (a2), the Tg of the acrylic polymer (A) to be formed is increased, and the tack of the pressure-sensitive adhesive layer is likely to be lowered. When the tackiness of the pressure-sensitive adhesive layer is lowered, it becomes difficult to sufficiently wet the adherend such as glass, and the followability is lowered. An acrylic polymer that does not use the heterocyclic-containing monomer (a2) when the bonding area is not so large or when an optical film having a smaller shrinkage than that of triacetyl cellulose is bonded to an adherend such as glass. (A) may also be used.
また、複素環含有モノマー(a2)を用いると、ノルボルネン系樹脂等の環状ポリオレフィンに対する感圧式接着剤層の粘着力を向上させることができるので、光学フィルムとして、環状ポリオレフィンを用いている場合に、好適である。 Further, when the heterocyclic ring-containing monomer (a2) is used, the pressure-sensitive adhesive layer can be improved in adhesion to the cyclic polyolefin such as a norbornene-based resin. Therefore, when the cyclic polyolefin is used as the optical film, Is preferred.
水酸基含有モノマー(a3)は、後述する化合物(B)との反応点として機能し得る成分である。
水酸基含有モノマー(a3)としては、重合性の官能基を有し、かつヒドロキシル基を有するものを特に制限なく用いることができる。ヒドロキシル基含有モノマーとしては、例えば、2−ヒドロキシエチル(メタ)アクリレート、2−ヒドロキシブチル(メタ)アクリレート、3−ヒドロキシプロピル(メタ)アクリレート、4−ヒドロキシブチル(メタ)アクリレート、6−ヒドロキシヘキシル(メタ)アクリレート、8−ヒドロキシオクチル(メタ)アクリレート、10−ヒドロキシデシル(メタ)アクリレート、12−ヒドロキシラウリル(メタ)アクリレート等のヒドロキシアルキル(メタ)アクリレート;その他、(4−ヒドロキシメチルシクロへキシル)メチルアクリレート、N−メチロール(メタ)アクリルアミド、N−ヒドロキシ(メタ)アクリルアミド、アリルアルコール、2−ヒドロキシエチルビニルエーテル、4−ヒドロキシブチルビニルエーテル、ジエチレングリコールモノビニルエーテルなどがあげられる。これらのなかでもヒドロキシアルキル(メタ)アクリレートが好適である。
The hydroxyl group-containing monomer (a3) is a component that can function as a reaction point with the compound (B) described later.
As the hydroxyl group-containing monomer (a3), those having a polymerizable functional group and having a hydroxyl group can be used without particular limitation. Examples of the hydroxyl group-containing monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 6-hydroxyhexyl ( Hydroxyalkyl (meth) acrylates such as (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth) acrylate, 12-hydroxylauryl (meth) acrylate; and others (4-hydroxymethylcyclohexyl) Methyl acrylate, N-methylol (meth) acrylamide, N-hydroxy (meth) acrylamide, allyl alcohol, 2-hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether, Ethylene glycol monomethyl ether. Of these, hydroxyalkyl (meth) acrylate is preferred.
アクリル系ポリマー(A)中の水酸基と化合物(B)と効果的反応を考慮すると、アクリル系ポリマー(A)中の水酸基は、アクリル系ポリマー(A)の主鎖からある程度離れていることが好ましい。そこで、分子内に水酸基を有するモノマー(a3)としては、ヒドロキシアルキル(メタ)アクリレートのうち、アルキル基の炭素数が3〜20のものが好ましく、特にアルキル基の炭素数が4〜10のものが好ましい。このようなヒドロキシアルキル(メタ)アクリレートを用いると、低い官能基濃度であっても、効率よく架橋でき、高温高湿下においても発泡や剥がれを生じず、かつ光透過率や位相差等の光学特性が低下しにくい、耐久性に優れる液晶表示装置を得ることができる。 Considering the effective reaction between the hydroxyl group in the acrylic polymer (A) and the compound (B), the hydroxyl group in the acrylic polymer (A) is preferably separated to some extent from the main chain of the acrylic polymer (A). . Then, as a monomer (a3) which has a hydroxyl group in a molecule | numerator, the thing whose carbon number of an alkyl group is 3-20 among hydroxyalkyl (meth) acrylate is preferable, and especially the thing whose carbon number of an alkyl group is 4-10. Is preferred. When such a hydroxyalkyl (meth) acrylate is used, it can be efficiently crosslinked even at a low functional group concentration, does not cause foaming or peeling even under high temperature and high humidity, and has optical properties such as light transmittance and retardation. It is possible to obtain a liquid crystal display device that is not easily deteriorated in characteristics and excellent in durability.
カルボキシル基含有モノマー(a4)も、後述する化合物(B)との反応点として機能し得る成分である。
カルボキシル基含有モノマー(a4)としては、重合性の官能基を有し、かつカルボキシル基を有するものを特に制限なく用いることができる。カルボキシル基含有モノマーとしては、例えば、(メタ)アクリル酸、カルボキシエチル(メタ)アクリレート、カルボキシペンチル(メタ)アクリレート、イタコン酸、マレイン酸、フマール酸、クロトン酸等があげられる。これらのなかで、(メタ)アクリル酸、特にアクリル酸が好ましい。
The carboxyl group-containing monomer (a4) is also a component that can function as a reaction point with the compound (B) described later.
As the carboxyl group-containing monomer (a4), those having a polymerizable functional group and having a carboxyl group can be used without particular limitation. Examples of the carboxyl group-containing monomer include (meth) acrylic acid, carboxyethyl (meth) acrylate, carboxypentyl (meth) acrylate, itaconic acid, maleic acid, fumaric acid, and crotonic acid. Of these, (meth) acrylic acid, particularly acrylic acid is preferred.
本発明で用いるアクリル系ポリマー(A)は、モノマーの合計100重量%とした場合に、アルキル(メタ)アクリレート(a1):83〜96重量%、複素環含有モノマー(a2):0〜10重量%、水酸基含有モノマー(a3):0.05〜10重量%、カルボキシル基含有モノマー(a4):0.5〜7重量%を共重合したものであり、(a1):83〜93重量%、(a2):4〜9.5重量%、(a3):0.075〜5重量%、(a4):0.5〜4.5重量%を共重合したものであることが好ましく、(a1):83〜90重量%、(a2):6〜9重量%、(a3):0.1〜3重量%、(a4):0.5〜4重量%を共重合したものであることがより好ましい。 The acrylic polymer (A) used in the present invention has an alkyl (meth) acrylate (a1): 83 to 96% by weight and a heterocyclic ring-containing monomer (a2): 0 to 10% by weight when the total amount of monomers is 100% by weight. %, Hydroxyl group-containing monomer (a3): 0.05 to 10% by weight, carboxyl group-containing monomer (a4): 0.5 to 7% by weight, (a1): 83 to 93% by weight, (A2): 4 to 9.5% by weight, (a3): 0.075 to 5% by weight, (a4): 0.5 to 4.5% by weight are preferably copolymerized, (a1 ): 83-90% by weight, (a2): 6-9% by weight, (a3): 0.1-3% by weight, (a4): 0.5-4% by weight More preferred.
水酸基含有モノマー(a3)の割合が前記範囲よりも少ないと、感圧式接着剤層を薄型化した場合の耐熱性を満足できない。また、水酸基含有モノマー(a3)の割合が前記範囲よりも多くなると、感圧式接着剤層を薄型化した場合に耐湿性の耐久性が満足できなくなる。また、水酸基含有モノマー(a3)の割合が前記範囲よりも多くなると粘着力が低下する点でも好ましくない。 When the proportion of the hydroxyl group-containing monomer (a3) is less than the above range, the heat resistance when the pressure-sensitive adhesive layer is thinned cannot be satisfied. On the other hand, if the proportion of the hydroxyl group-containing monomer (a3) exceeds the above range, the durability of moisture resistance cannot be satisfied when the pressure-sensitive adhesive layer is thinned. Moreover, when the ratio of a hydroxyl-containing monomer (a3) becomes larger than the said range, it is unpreferable also at the point which adhesive force falls.
カルボキシル基含有モノマー(a4)の割合が前記範囲よりも少ないと、感圧式接着剤層を薄型化した場合、耐熱性を満足できない。また、カルボキシル基含有モノマー(a4)の割合が前記範囲よりも多くなると、薄型化した場合に耐熱性、耐湿性のいずれの耐久性も満足できなくなる。また、カルボキシル基含有モノマーの割合が前記範囲よりも多くなると粘着力が低下する点でも好ましくない。 When the ratio of the carboxyl group-containing monomer (a4) is less than the above range, the heat resistance cannot be satisfied when the pressure-sensitive adhesive layer is thinned. In addition, when the proportion of the carboxyl group-containing monomer (a4) is larger than the above range, neither heat resistance nor moisture resistance can be satisfied when the thickness is reduced. Moreover, when the ratio of a carboxyl group-containing monomer exceeds the said range, it is unpreferable also at the point which adhesive force falls.
本発明では、前記アクリル系ポリマー(A)を形成するモノマー成分としては、前記モノマーの他に、本発明の目的と損なわない範囲で、前記以外のモノマーを、モノマー全量の10%以下の範囲で用いることができる。 In this invention, as a monomer component which forms the said acrylic polymer (A), in addition to the said monomer, in the range which does not impair the objective of this invention, a monomer other than the above is in 10% or less of the total amount of monomers. Can be used.
かかる任意モノマーとしては、無水マレイン酸、無水イタコン酸などの酸無水物基含有モノマー;アクリル酸のカプロラクトン付加物;スチレンスルホン酸やアリルスルホン酸、2−(メタ)アクリルアミド−2−メチルプロパンスルホン酸、(メタ)アクリルアミドプロパンスルホン酸、スルホプロピル(メタ)アクリレート、(メタ)アクリロイルオキシナフタレンスルホン酸などのスルホン酸基含有モノマー;2−ヒドロキシエチルアクリロイルホスフェートなどの燐酸基含有モノマーなどがあげられる。窒素含有ビニルモノマーがあげられる。例えば、マレイミド、N−シクロへキシルマレイミド、N−フェニルマレイミド;(メタ)アクリルアミド、N,N−ジメチル(メタ)アクリルアミド、N,N−ジエチル(メタ)アクリルアミド、N−ヘキシル(メタ)アクリルアミド、N−メチル(メタ)アクリルアミド、N−ブチル(メタ)アクリルアミド、N−ブチル(メタ)アクリルアミドやN−メチロール(メタ)アクリルアミド、N−メチロールプロパン(メタ)アクリルアミドなどの(N−置換)アミド系モノマー;(メタ)アクリル酸アミノエチル、(メタ)アクリル酸アミノプロピル、(メタ)アクリル酸N,N−ジメチルアミノエチル、(メタ)アクリル酸t−ブチルアミノエチル、3−(3−ピリニジル)プロピル(メタ)アクリレートなどの(メタ)アクリル酸アルキルアミノアルキル系モノマー;(メタ)アクリル酸メトキシエチル、(メタ)アクリル酸エトキシエチルなどの(メタ)アクリル酸アルコキシアルキル系モノマー;N−(メタ)アクリロイルオキシメチレンスクシンイミドやN−(メタ)アクリロイル−6−オキシヘキサメチレンスクシンイミド、N−(メタ)アクリロイル−8−オキシオクタメチレンスクシンイミドなどのスクシンイミド系モノマーなどあげられる。 Examples of such optional monomers include maleic anhydride, itaconic anhydride and other acid anhydride group-containing monomers; acrylic acid caprolactone adducts; styrene sulfonic acid, allyl sulfonic acid, 2- (meth) acrylamide-2-methylpropane sulfonic acid Sulfonic acid group-containing monomers such as (meth) acrylamide propanesulfonic acid, sulfopropyl (meth) acrylate and (meth) acryloyloxynaphthalene sulfonic acid; and phosphoric acid group-containing monomers such as 2-hydroxyethylacryloyl phosphate. Examples thereof include nitrogen-containing vinyl monomers. For example, maleimide, N-cyclohexylmaleimide, N-phenylmaleimide; (meth) acrylamide, N, N-dimethyl (meth) acrylamide, N, N-diethyl (meth) acrylamide, N-hexyl (meth) acrylamide, N -(N-substituted) amide monomers such as methyl (meth) acrylamide, N-butyl (meth) acrylamide, N-butyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylolpropane (meth) acrylamide; Aminoethyl (meth) acrylate, aminopropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, t-butylaminoethyl (meth) acrylate, 3- (3-pyridinyl) propyl (meth) ) (Meth) acrylic acid such as acrylate Kill aminoalkyl monomers; (meth) acrylic acid alkoxyalkyl monomers such as (meth) acrylic acid methoxyethyl and (meth) acrylic acid ethoxyethyl; N- (meth) acryloyloxymethylene succinimide and N- (meth) acryloyl- Examples include succinimide monomers such as 6-oxyhexamethylene succinimide and N- (meth) acryloyl-8-oxyoctamethylene succinimide.
さらに、酢酸ビニル、プロピオン酸ビニル、N−ビニルピロリドン、メチルビニルピロリドン、ビニルピリジン、ビニルピペリドン、ビニルピリミジン、ビニルピペラジン、ビニルピラジン、ビニルピロール、ビニルイミダゾール、ビニルオキサゾール、ビニルモルホリン、N−ビニルカルボン酸アミド類、スチレン、α−メチルスチレン、N−ビニルカプロラクタムなどのビニル系モノマー;アクリロニトリル、メタクリロニトリルなどのシアノアクリレート系モノマー;(メタ)アクリル酸グリシジルなどのエポキシ基含有アクリル系モノマー;(メタ)アクリル酸ポリエチレングリコール、(メタ)アクリル酸ポリプロピレングリコール、(メタ)アクリル酸メトキシエチレングリコール、(メタ)アクリル酸メトキシポリプロピレングリコールなどのグリコール系アクリルエステルモノマー;(メタ)アクリル酸テトラヒドロフルフリル、フッ素(メタ)アクリレート、シリコーン(メタ)アクリレートや2−メトキシエチルアクリレートなどのアクリル酸エステル系モノマーなども使用することができる。 Further, vinyl acetate, vinyl propionate, N-vinyl pyrrolidone, methyl vinyl pyrrolidone, vinyl pyridine, vinyl piperidone, vinyl pyrimidine, vinyl piperazine, vinyl pyrazine, vinyl pyrrole, vinyl imidazole, vinyl oxazole, vinyl morpholine, N-vinyl carboxylic acid amide , Vinyl monomers such as styrene, α-methylstyrene, N-vinylcaprolactam; cyanoacrylate monomers such as acrylonitrile and methacrylonitrile; epoxy group-containing acrylic monomers such as glycidyl (meth) acrylate; (meth) acrylic Polyethylene glycol acid, polypropylene glycol (meth) acrylate, methoxyethylene glycol (meth) acrylate, methoxypolypropylene (meth) acrylate Glycol acrylic ester monomers such as recall; (meth) acrylic acid tetrahydrofurfuryl, fluorine (meth) acrylate, silicone (meth) acrylate and acrylic acid ester monomers such as 2-methoxyethyl acrylate, etc. may also be used.
さらに、上記以外の共重合可能なモノマーとして、ケイ素原子を含有するシラン系モノマーなどがあげられる。シラン系モノマーとしては、例えば、3−アクリロキシプロピルトリエトキシシラン、ビニルトリメトキシシラン、ビニルトリエトキシシラン、4−ビニルブチルトリメトキシシラン、4−ビニルブチルトリエトキシシラン、8−ビニルオクチルトリメトキシシラン、8−ビニルオクチルトリエトキシシラン、10−メタクリロイルオキシデシルトリメトキシシラン、10−アクリロイルオキシデシルトリメトキシシラン、10−メタクリロイルオキシデシルトリエトキシシラン、10−アクリロイルオキシデシルトリエトキシシランなどがあげられる。 Furthermore, examples of copolymerizable monomers other than the above include silane monomers containing silicon atoms. Examples of the silane monomer include 3-acryloxypropyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, 4-vinylbutyltrimethoxysilane, 4-vinylbutyltriethoxysilane, and 8-vinyloctyltrimethoxysilane. 8-vinyloctyltriethoxysilane, 10-methacryloyloxydecyltrimethoxysilane, 10-acryloyloxydecyltrimethoxysilane, 10-methacryloyloxydecyltriethoxysilane, 10-acryloyloxydecyltriethoxysilane, and the like.
本発明において用いられるアクリル系ポリマー(A)は、重量平均分子量が160万〜280万である。さらに、重量平均分子量は170万〜270万であることがより好ましく、200万〜250万であることがさらに好ましい。重量平均分子量が前記範囲よりも小さいと、感圧式接着剤層を薄型化した場合の耐熱性、耐湿性のいずれの耐久性も満足できない。また、重量平均分子量が前記範囲よりも大きくなると感圧式接着剤層を薄型化した場合の前記耐久性が満足できなくなり、さらに貼り合せ性、粘着力が低下する点でも好ましくない。なお、重量平均分子量は、GPC(ゲル・パーミエーション・クロマトグラフィー)により測定し、ポリスチレン換算により算出された値をいう。
また、本発明に用いられるアクリル系ポリマー(A)は、ガラス転移温度は−60〜0℃であり、−55〜−25℃であることが好ましい。
The acrylic polymer (A) used in the present invention has a weight average molecular weight of 1.6 million to 2.8 million. Furthermore, the weight average molecular weight is more preferably 1,700,000 to 2,700,000, and further preferably 2,000,000 to 2,500,000. When the weight average molecular weight is smaller than the above range, neither heat resistance nor moisture resistance when the pressure-sensitive adhesive layer is thinned can be satisfied. Further, if the weight average molecular weight is larger than the above range, the durability when the pressure-sensitive adhesive layer is thinned cannot be satisfied, and further, the bonding property and the adhesive strength are not preferable. The weight average molecular weight is a value measured by GPC (gel permeation chromatography) and calculated in terms of polystyrene.
The acrylic polymer (A) used in the present invention has a glass transition temperature of −60 to 0 ° C., preferably −55 to −25 ° C.
本発明において用いられるアクリル系ポリマー(A)は、溶液重合、塊状重合、乳化重合、各種ラジカル重合などの公知の製造方法を適宜選択できるが、乳化剤や懸濁剤等の重合安定剤を含まない溶液重合法及び塊状重合法により製造したものが好ましい。また、得られるアクリル系ポリマー(A)は、ランダム共重合体、ブロック共重合体、グラフト共重合体などいずれでもよい。 The acrylic polymer (A) used in the present invention can be appropriately selected from known production methods such as solution polymerization, bulk polymerization, emulsion polymerization, and various radical polymerizations, but does not contain a polymerization stabilizer such as an emulsifier or a suspending agent. What was manufactured by the solution polymerization method and the block polymerization method is preferable. Further, the acrylic polymer (A) to be obtained may be any of a random copolymer, a block copolymer, a graft copolymer and the like.
ラジカル重合に用いられる重合開始剤、連鎖移動剤、乳化剤などは特に限定されず適宜選択して使用することができる。なお、アクリル系ポリマー(A)の重量平均分子量は、重合開始剤、連鎖移動剤の使用量、反応条件により制御可能であり、これらの種類に応じて適宜のその使用量が調整される。 The polymerization initiator, chain transfer agent, emulsifier and the like used for radical polymerization are not particularly limited and can be appropriately selected and used. The weight average molecular weight of the acrylic polymer (A) can be controlled by the amount of polymerization initiator, chain transfer agent used, and reaction conditions, and the amount used is appropriately adjusted according to these types.
重合開始剤としては、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−アミジノプロパン)ジヒドロクロライド、2,2’−アゾビス[2−(5−メチル−2−イミダゾリン−2−イル)プロパン]ジヒドロクロライド、2,2’−アゾビス(2−メチルプロピオンアミジン)二硫酸塩、2,2’−アゾビス(N,N’−ジメチレンイソブチルアミジン)、2,2’−アゾビス[N−(2−カルボキシエチル)−2−メチルプロピオンアミジン]ハイドレート(和光純薬社製、VA−057)などのアゾ系開始剤、過硫酸カリウム、過硫酸アンモニウムなどの過硫酸塩、ジ(2−エチルヘキシル)パーオキシジカーボネート、ジ(4−t−ブチルシクロヘキシル)パーオキシジカーボネート、ジ−sec−ブ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−ヘキシルパーオキシピバレート、t−ブチルパーオキシピバレート、ジラウロイルパーオキシド、ジ−n−オクタノイルパーオキシド、1,1,3,3−テトラメチルブチルパーオキシ−2−エチルヘキサノエート、ジ(4−メチルベンゾイル)パーオキシド、ジベンゾイルパーオキシド、t−ブチルパーオキシイソブチレート、1,1−ジ(t−ヘキシルパーオキシ)シクロヘキサン、t−ブチルハイドロパーオキシド、過酸化水素などの過酸化物系開始剤、過硫酸塩と亜硫酸水素ナトリウムの組み合わせ、過酸化物とアスコルビン酸ナトリウムの組み合わせなどの過酸化物と還元剤とを組み合わせたレドックス系開始剤などをあげることができるが、これらに限定されるものではない。 Examples of the polymerization initiator include 2,2′-azobisisobutyronitrile, 2,2′-azobis (2-amidinopropane) dihydrochloride, 2,2′-azobis [2- (5-methyl-2). -Imidazolin-2-yl) propane] dihydrochloride, 2,2'-azobis (2-methylpropionamidine) disulfate, 2,2'-azobis (N, N'-dimethyleneisobutylamidine), 2,2 '-Azobis [N- (2-carboxyethyl) -2-methylpropionamidine] hydrate (manufactured by Wako Pure Chemical Industries, VA-057) and other azo initiators, and persulfates such as potassium persulfate and ammonium persulfate , Di (2-ethylhexyl) peroxydicarbonate, di (4-t-butylcyclohexyl) peroxydicarbonate, di-sec-butyl -Oxydicarbonate, t-butylperoxyneodecanoate, t-hexylperoxypivalate, t-butylperoxypivalate, dilauroyl peroxide, di-n-octanoyl peroxide, 1,1,3 , 3-tetramethylbutylperoxy-2-ethylhexanoate, di (4-methylbenzoyl) peroxide, dibenzoyl peroxide, t-butylperoxyisobutyrate, 1,1-di (t-hexylperoxy) ) Peroxides such as cyclohexane, t-butyl hydroperoxide, hydrogen peroxide, peroxides and sodium bisulfite, peroxides and sodium ascorbate Redox initiators combined with Not intended to be.
前記重合開始剤は、単独で使用してもよく、また2種以上を混合して使用してもよいが、全体としての含有量はモノマー100重量部に対して、0.005〜1重量部程度であることが好ましく、0.02〜0.5重量部程度であることがより好ましい。 The polymerization initiator may be used alone or in combination of two or more, but the total content is 0.005 to 1 part by weight with respect to 100 parts by weight of the monomer. Is preferably about 0.02 to 0.5 parts by weight.
なお、重合開始剤として、例えば、2,2’−アゾビスイソブチロニトリルを用いて、前記重量平均分子量の(メタ)アクリル系ポリマーを製造するには、重合開始剤の使用量は、モノマー成分の全量100重量部に対して、0.06〜0.2重量部程度とするのが好ましく、さらには0.08〜0.175重量部程度とするのが好ましい。 In order to produce the (meth) acrylic polymer having the weight average molecular weight using, for example, 2,2′-azobisisobutyronitrile as the polymerization initiator, the amount of the polymerization initiator used is a monomer. The amount is preferably about 0.06 to 0.2 part by weight, more preferably about 0.08 to 0.175 part by weight with respect to 100 parts by weight of the total amount of the components.
連鎖移動剤としては、例えば、ラウリルメルカプタン、グリシジルメルカプタン、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−プロパノールなどがあげられる。連鎖移動剤は、単独で使用してもよく、また2種以上を混合して使用してもよいが、全体としての含有量はモノマー成分の全量100重量部に対して、0.1重量部程度以下である。 Examples of the chain transfer agent include lauryl mercaptan, glycidyl mercaptan, mercaptoacetic acid, 2-mercaptoethanol, thioglycolic acid, 2-ethylhexyl thioglycolate, and 2,3-dimercapto-1-propanol. The chain transfer agent may be used alone or in combination of two or more, but the total content is 0.1 parts by weight with respect to 100 parts by weight of the total amount of monomer components. Less than or equal to
また、乳化重合する場合に用いる乳化剤としては、例えば、ラウリル硫酸ナトリウム、ラウリル硫酸アンモニウム、ドデシルベンゼンスルホン酸ナトリウム、ポリオキシエチレンアルキルエーテル硫酸アンモニウム、ポリオキシエチレンアルキルフェニルエーテル硫酸ナトリウムなどのアニオン系乳化剤、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンアルキルフェニルエーテル、ポリオキシエチレン脂肪酸エステル、ポリオキシエチレン−ポリオキシプロピレンブロックポリマーなどのノニオン系乳化剤などがあげられる。これらの乳化剤は、単独で用いてもよく2種以上を併用してもよい。 Examples of the emulsifier used in emulsion polymerization include anionic emulsifiers such as sodium lauryl sulfate, ammonium lauryl sulfate, sodium dodecylbenzenesulfonate, ammonium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl phenyl ether sulfate, and polyoxy Nonionic emulsifiers such as ethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene fatty acid ester, and polyoxyethylene-polyoxypropylene block polymer are listed. These emulsifiers may be used alone or in combination of two or more.
さらに、反応性乳化剤として、プロペニル基、アリルエーテル基などのラジカル重合性官能基が導入された乳化剤として、具体的には、例えば、アクアロンHS−10、HS−20、KH−10、BC−05、BC−10、BC−20(以上、いずれも第一工業製薬社製)、アデカリアソープSE10N(旭電化工社製)などがある。反応性乳化剤は、重合後にポリマー鎖に取り込まれるため、耐水性がよくなり好ましい。乳化剤の使用量は、モノマー成分の全量100重量部に対して、0.3〜5重量部、重合安定性や機械的安定性から0.5〜1重量部がより好ましい。 Further, as reactive emulsifiers, as emulsifiers into which radical polymerizable functional groups such as propenyl groups and allyl ether groups are introduced, specifically, for example, Aqualon HS-10, HS-20, KH-10, BC-05 BC-10, BC-20 (all of which are manufactured by Daiichi Kogyo Seiyaku Co., Ltd.), Adekaria soap SE10N (manufactured by Asahi Denka Kogyo Co., Ltd.), and the like. Reactive emulsifiers are preferable because they are incorporated into the polymer chain after polymerization and thus have improved water resistance. The amount of the emulsifier used is more preferably 0.3 to 5 parts by weight and 0.5 to 1 part by weight from the viewpoint of polymerization stability and mechanical stability with respect to 100 parts by weight of the total amount of monomer components.
本発明の感圧式接着剤は、前記アクリル系ポリマー(A)に対し、架橋剤(硬化剤)として機能する水酸基もしくはカルボキシル基と反応し得る官能基を含有する化合物(B)を含有する。
化合物(B)としては、イソシアネート化合物、エポキシ系化合物、アミン系化合物、金属キレート系化合物、アジリジン系化合物が挙げられる。特に、イソシアネート系架橋剤が好ましい。架橋剤の使用量は、アクリル系ポリマー(A)100重量部に対して、0.02〜2重量部であることが好ましい。
The pressure sensitive adhesive of this invention contains the compound (B) containing the functional group which can react with the hydroxyl group or carboxyl group which functions as a crosslinking agent (curing agent) with respect to the acrylic polymer (A).
Examples of the compound (B) include an isocyanate compound, an epoxy compound, an amine compound, a metal chelate compound, and an aziridine compound. In particular, an isocyanate-based crosslinking agent is preferable. It is preferable that the usage-amount of a crosslinking agent is 0.02-2 weight part with respect to 100 weight part of acrylic polymers (A).
イソシアネート化合物の例としては、トリレンジイソシアネート、クロルフェニレンジイソシアナート、ヘキサメチレンジイソシアナート、テトラメチレンジイソシアナート、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、ジフェニルメタンジイソシアネート、水添されたジフェニルメタンジイソシアネートなどの2官能のイソシアネートモノマー、及びこれら2官能のイソシアネートモノマーをトリメチロールプロパンなどの3官能ポリオールで変性したいわゆるアダクト体、2官能のイソシアネートモノマーの3分子から形成されるイソシアヌレート環を有する3量体(イソシアヌレート体)、2官能のイソシアネートモノマー3モルと水との反応生成物であるビュレット型化合物、さらにはポリエーテルポリオールや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、ポリイソプレンポリオールなど付加反応させたウレタンプレポリマー型のイソシアネートなどを挙げることができる。これらイソシアネート化合物は、アクリル系ポリマー(A)100重量部に対して、0.02〜2重量部含有してなることが好ましく、0.04〜1.5重量部含有してなることがより好ましく、0.05〜1重量部含有してなることがさらに好ましい。0.02重量部未満では、凝集力が不足する場合があり、一方、2重量部を超えると、架橋形成が過多となり、接着性に劣る場合がある。 Examples of isocyanate compounds are bifunctional, such as tolylene diisocyanate, chlorophenylene diisocyanate, hexamethylene diisocyanate, tetramethylene diisocyanate, isophorone diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate, hydrogenated diphenylmethane diisocyanate. Isocyanate monomers, and so-called adducts obtained by modifying these bifunctional isocyanate monomers with trifunctional polyols such as trimethylolpropane, and trimers having isocyanurate rings formed from three molecules of bifunctional isocyanate monomers (isocyanurate bodies) ) A burette type compound which is a reaction product of 3 mol of a bifunctional isocyanate monomer and water, as well as a polyether polyol or a polyol. Ester polyols, acryl polyols, polybutadiene polyols, polyisoprene polyols urethane prepolymer type obtained by addition reaction, such as isocyanate and the like. These isocyanate compounds are preferably contained in an amount of 0.02 to 2 parts by weight, more preferably 0.04 to 1.5 parts by weight, based on 100 parts by weight of the acrylic polymer (A). More preferably, 0.05 to 1 part by weight is contained. When the amount is less than 0.02 parts by weight, the cohesive force may be insufficient. On the other hand, when the amount exceeds 2 parts by weight, crosslinking may be excessively formed and the adhesiveness may be deteriorated.
これらイソシアネート化合物は、単独で、もしくは2種以上を組み合わせて使用することができる。柔軟性を重視する用途で使用する場合は、3官能イソシアネート化合物を使用することが好ましい。
具体的には、本発明では、ジイソシアネート化合物としては、4,4’−ジフェニルメタンジイソシアネート、ヘキサメチレンジイソシアネート、3−イソシアネートメチル−3,5,5−トリメチルシクロヘキシルイソシアネート(「イソホロンジイソシアネート」とも言う)等の2官能のイソシアネートモノマーから形成される3官能のイソシアネート化合物を使用することが好ましい。
These isocyanate compounds can be used alone or in combination of two or more. In the case of using in an application in which flexibility is important, it is preferable to use a trifunctional isocyanate compound.
Specifically, in the present invention, as the diisocyanate compound, 4,4′-diphenylmethane diisocyanate, hexamethylene diisocyanate, 3-isocyanate methyl-3,5,5-trimethylcyclohexyl isocyanate (also referred to as “isophorone diisocyanate”), etc. It is preferable to use a trifunctional isocyanate compound formed from a bifunctional isocyanate monomer.
また、エポキシ系化合物の例としては、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、N,N,N’,N’−テトラグリシジルアミノフェニルメタン、トリグルシジル等が挙げられる。 Examples of epoxy compounds include bisphenol A-epichlorohydrin type epoxy resins, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, and 1,6-hexane. Diol diglycidyl ether, trimethylolpropane triglycidyl ether, diglycidyl aniline, N, N, N ′, N′-tetraglycidyl-m-xylylenediamine, 1,3-bis (N, N′-diglycidylaminomethyl) ) Cyclohexane, N, N, N ′, N′-tetraglycidylaminophenylmethane, triglycidyl and the like.
アジリジン化合物の例としては、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)、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、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 aziridine compounds include N, N′-diphenylmethane-4,4′-bis (1-aziridinecarboxite), N, N′-toluene-2,4-bis (1-aziridinecarboxite), bisiso Phthaloyl-1- (2-methylaziridine), tri-1-aziridinylphosphine oxide, N, N′-hexamethylene-1,6-bis (1-aziridinecarboxite), trimethylolpropane tri-β- Examples thereof include aziridinyl propionate, tetramethylolmethane tri-β-aziridinyl propionate, tris-2,4,6- (1-aziridinyl) -1,3,5-triazine.
また、金属キレート硬化剤の例としては、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やアセト酢酸エチルとの配位化合物などが挙げられる。 Examples of metal chelate curing agents include coordination compounds of polyvalent metals such as aluminum, iron, copper, zinc, tin, titanium, nickel, antimony, magnesium, vanadium, chromium and zirconium with acetylacetone and ethyl acetoacetate. Etc.
さらに、アミン系硬化剤の例としては、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などが挙げられる。 Furthermore, examples of the amine curing agent include hexamethylenediamine, triethyldiamine, polyethyleneimine, hexamethylenetetramine, diethylenetriamine, triethyltetramine, isophoronediamine, amino resin, and methylene resin.
次に本発明に用いられる帯電防止付与剤(D)について説明する。
本発明に用いられる帯電防止付与剤(D)は、ボロン系帯電防止剤であり、下記一般式[1]で表されるアンモニウム塩系の化合物(D1)か、もしくは下記一般式[2]で表されるアルカリ金属塩系の化合物(D2)である。
Next, the antistatic agent (D) used in the present invention will be described.
The antistatic imparting agent (D) used in the present invention is a boron-based antistatic agent, and is an ammonium salt compound (D1) represented by the following general formula [1], or the following general formula [2]. This is an alkali metal salt compound (D2) represented.
一般式(2)中、A+は、アルカリ金属イオンを表す。)
In the general formula (2), A + represents an alkali metal ion. )
アンモニウム塩系の化合物(D1)は、カチオン部がN+R5R6R7R8であり、アニオン部も含め、構成部がすべて有機物となることから、上記アクリル系ポリマー(A)や溶剤への相溶性が高いという特徴を持つ。また、アンモニウム塩系の化合物(D1)を用いた場合、帯電防止性能が環境湿度の影響を受けにくい。
また、化合物(D2)は、カチオン部がアルカリ金属イオンであるので、製造工程が短縮でき安価で製造することができるといった特徴を持つ。
しかし、アルカリ金属塩系の化合物(D2)を用いた場合、電子部品、例えば、内装回路、トランジスタ、IC、CPUを汚染する可能性があり、これらが汚染されると動作異常の発生が懸念される。また、アルカリ金属塩系の化合物(D2)を用いた場合、被着体がアルミニウム等であると、高温多湿の環境で浮きが発生し易い。さらに、アルカリ金属塩系の化合物(D2)を用いた場合、帯電防止性能が環境湿度の影響を受けやすい。
よって、本発明においては、帯電防止付与剤(D)として一般式[1]で表されるアンモニウム塩系の化合物(D1)を用いることが好ましい。
In the ammonium salt compound (D1), the cation part is N + R 5 R 6 R 7 R 8 , and all the constituent parts including the anion part are organic, so that the acrylic polymer (A) or solvent It is characterized by high compatibility. Further, when the ammonium salt compound (D1) is used, the antistatic performance is hardly affected by the environmental humidity.
In addition, since the cation moiety is an alkali metal ion, the compound (D2) has characteristics that the production process can be shortened and can be produced at low cost.
However, when an alkali metal salt compound (D2) is used, there is a possibility that electronic components such as internal circuits, transistors, ICs and CPUs may be contaminated. The Further, when the alkali metal salt compound (D2) is used, if the adherend is aluminum or the like, the floating is likely to occur in a high temperature and high humidity environment. Furthermore, when an alkali metal salt compound (D2) is used, the antistatic performance is easily affected by environmental humidity.
Therefore, in the present invention, it is preferable to use the ammonium salt compound (D1) represented by the general formula [1] as the antistatic agent (D).
置換基を有してもよいアルキル基としては、炭素数1〜30のアルキル基が好ましく、例えば、メチル基、エチル基、プロピル基、ブチル基、ヘキシル基、オクチル基、デシル基、ドデシル基、オクダデシル基、イソプロピル基、イソブチル基、sec−ブチル基、tert−ブチル基、1−エチルペンチル基、シクロペンチル基、シクロヘキシル基、トリフルオロメチル基、2−エチルヘキシル基、フェナシル基、1−ナフトイルメチル基、2−ナフトイルメチル基、4−メチルスルファニルフェナシル基、4−フェニルスルファニルフェナシル基、4−ジメチルアミノフェナシル基、4−シアノフェナシル基4−メチルフェナシル基、2−メチルフェナシル基、3−フルオロフェナシル基、3−トリフルオロメチルフェナシル基、3−ニトロフェナシル基等が挙げられる。 As the alkyl group which may have a substituent, an alkyl group having 1 to 30 carbon atoms is preferable, for example, methyl group, ethyl group, propyl group, butyl group, hexyl group, octyl group, decyl group, dodecyl group, Okudadecyl group, isopropyl group, isobutyl group, sec-butyl group, tert-butyl group, 1-ethylpentyl group, cyclopentyl group, cyclohexyl group, trifluoromethyl group, 2-ethylhexyl group, phenacyl group, 1-naphthoylmethyl group 2-naphthoylmethyl group, 4-methylsulfanylphenacyl group, 4-phenylsulfanylphenacyl group, 4-dimethylaminophenacyl group, 4-cyanophenacyl group 4-methylphenacyl group, 2-methylphenacyl group, 3-fluorophenacyl group, 3-trifluoromethylphenacyl group, 3-nitrophena Examples include a syl group.
置換基を有してもよいアルケニル基としては、炭素数2〜10のアルケニル基が好ましく、例えば、ビニル基、アリル基、スチリル基等が挙げられる。 As an alkenyl group which may have a substituent, a C2-C10 alkenyl group is preferable, for example, a vinyl group, an allyl group, a styryl group etc. are mentioned.
置換基を有してもよいアルキニル基としては、炭素数2〜10のアルキニル基が好ましく、例えば、エチニル基、プロピニル基、プロパルギル基等が挙げられる。 The alkynyl group which may have a substituent is preferably an alkynyl group having 2 to 10 carbon atoms, and examples thereof include an ethynyl group, a propynyl group, and a propargyl group.
置換基を有してもよいアリール基としては、炭素数6〜30のアリール基が好ましく、フェニル基、ビフェニル基、1−ナフチル基、2−ナフチル基、9−アンスリル基、9−フェナントリル基、1−ピレニル基、5−ナフタセニル基、1−インデニル基、2−アズレニル基、9−フルオレニル基、ターフェニル基、クオーターフェニル基、o−、m−、およびp−トリル基、キシリル基、o−、m−、およびp−クメニル基、メシチル基、ペンタレニル基、ビナフタレニル基、ターナフタレニル基、クオーターナフタレニル基、ヘプタレニル基、ビフェニレニル基、インダセニル基、フルオランテニル基、アセナフチレニル基、アセアントリレニル基、フェナレニル基、フルオレニル基、アントリル基、ビアントラセニル基、ターアントラセニル基、クオーターアントラセニル基、アントラキノリル基、フェナントリル基、トリフェニレニル基、ピレニル基、クリセニル基、ナフタセニル基、プレイアデニル基、ピセニル基、ペリレニル基、ペンタフェニル基、ペンタセニル基、テトラフェニレニル基、ヘキサフェニル基、ヘキサセニル基、ルビセニル基、コロネニル基、トリナフチレニル基、ヘプタフェニル基、ヘプタセニル基、ピラントレニル基、オバレニル基等が挙げられる。 As the aryl group which may have a substituent, an aryl group having 6 to 30 carbon atoms is preferable, and a phenyl group, a biphenyl group, a 1-naphthyl group, a 2-naphthyl group, a 9-anthryl group, a 9-phenanthryl group, 1-pyrenyl group, 5-naphthacenyl group, 1-indenyl group, 2-azurenyl group, 9-fluorenyl group, terphenyl group, quarterphenyl group, o-, m-, and p-tolyl group, xylyl group, o- , M-, and p-cumenyl group, mesityl group, pentarenyl group, binaphthalenyl group, turnaphthalenyl group, quarternaphthalenyl group, heptaenyl group, biphenylenyl group, indacenyl group, fluoranthenyl group, acenaphthylenyl group, aceanthrylenyl group, Phenalenyl group, fluorenyl group, anthryl group, bianthracenyl group, teranthra Nyl group, quarter anthracenyl group, anthraquinolyl group, phenanthryl group, triphenylenyl group, pyrenyl group, chrysenyl group, naphthacenyl group, preadenyl group, picenyl group, perylenyl group, pentaphenyl group, pentacenyl group, tetraphenylenyl group, Examples include a hexaphenyl group, a hexacenyl group, a rubicenyl group, a coronenyl group, a trinaphthylenyl group, a heptaphenyl group, a heptacenyl group, a pyranthrenyl group, and an ovalenyl group.
置換基を有してもよい複素環基としては、窒素原子、酸素原子、硫黄原子、リン原子を含む、芳香族あるいは脂肪族の複素環が好ましい。例えば、チエニル基、ベンゾ[b]チエニル基、ナフト[2,3−b]チエニル基、チアントレニル基、フリル基、ピラニル基、イソベンゾフラニル基、クロメニル基、キサンテニル基、フェノキサチイニル基、2H−ピロリル基、ピロリル基、イミダゾリル基、ピラゾリル基、ピリジル基、ピラジニル基、ピリミジニル基、ピリダジニル基、インドリジニル基、イソインドリル基、3H−インドリル基、インドリル基、1H−インダゾリル基、プリニル基、4H−キノリジニル基、イソキノリル基、キノリル基、フタラジニル基、ナフチリジニル基、キノキサニリル基、キナゾリニル基、シンノリニル基、プテリジニル基、4aH−カルバゾリル基、カルバゾリル基、β−カルボリニル基、フェナントリジニル基、アクリジニル基、ペリミジニル基、フェナントロリニル基、フェナジニル基、フェナルサジニル基、イソチアゾリル基、フェノチアジニル基、イソキサゾリル基、フラザニル基、フェノキサジニル基、イソクロマニル基、クロマニル基、ピロリジニル基、ピロリニル基、イミダゾリジニル基、イミダゾリニル基、ピラゾリジニル基、ピラゾリニル基、ピペリジル基、ピペラジニル基、インドリニル基、イソインドリニル基、キヌクリジニル基、モルホリニル基、チオキサントリル基等が挙げられる。 The heterocyclic group that may have a substituent is preferably an aromatic or aliphatic heterocyclic ring containing a nitrogen atom, an oxygen atom, a sulfur atom, or a phosphorus atom. For example, thienyl group, benzo [b] thienyl group, naphtho [2,3-b] thienyl group, thiantenyl group, furyl group, pyranyl group, isobenzofuranyl group, chromenyl group, xanthenyl group, phenoxathinyl group, 2H-pyrrolyl group, pyrrolyl group, imidazolyl group, pyrazolyl group, pyridyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, indolizinyl group, isoindolyl group, 3H-indolyl group, indolyl group, 1H-indazolyl group, purinyl group, 4H- Quinolidinyl group, isoquinolyl group, quinolyl group, phthalazinyl group, naphthyridinyl group, quinoxanilyl group, quinazolinyl group, cinnolinyl group, pteridinyl group, 4aH-carbazolyl group, carbazolyl group, β-carbolinyl group, phenanthridinyl group, acridinyl group Group, phenanthrolinyl group, phenazinyl group, phenalsadinyl group, isothiazolyl group, phenothiazinyl group, isoxazolyl group, furazanyl group, phenoxazinyl group, isochromanyl group, chromanyl group, pyrrolidinyl group, pyrrolinyl group, imidazolidinyl group, imidazolinyl group, pyrazolidinyl group Group, pyrazolinyl group, piperidyl group, piperazinyl group, indolinyl group, isoindolinyl group, quinuclidinyl group, morpholinyl group, thioxanthryl group and the like.
さらに、前述した置換基を有してもよいアルキル基、置換基を有してもよいアルケニル基、置換基を有してもよいアルキニル基、置換基を有してもよいアリール基および置換基を有してもよい複素環基の水素原子はさらに他の置換基で置換されていても良い。 Furthermore, the alkyl group which may have a substituent mentioned above, the alkenyl group which may have a substituent, the alkynyl group which may have a substituent, the aryl group and the substituent which may have a substituent The hydrogen atom of the heterocyclic group which may have may be further substituted with another substituent.
そのような置換基としては、例えばフッ素原子、塩素原子、臭素原子、ヨウ素原子等のハロゲン基、メトキシ基、エトキシ基、tert−ブトキシ基等のアルコキシ基、フェノキシ基、p−トリルオキシ基等のアリールオキシ基、メトキシカルボニル基、ブトキシカルボニル基、フェノキシカルボニル基、ビニルオキシカルボニル基、アリールオキシカルボニル基等のアルコキシカルボニル基、アセトキシ基、プロピオニルオキシ基、ベンゾイルオキシ基等のアシルオキシ基、アセチル基、ベンゾイル基、イソブチリル基、アクリロイル基、メタクリロイル基、メトキサリル基等のアシル基、メチルスルファニル基、tert−ブチルスルファニル基等のアルキルスルファニル基、フェニルスルファニル基、p−トリルスルファニル基等のアリールスルファニル基、メチルアミノ基、シクロヘキシルアミノ基等のアルキルアミノ基、ジメチルアミノ基、ジエチルアミノ基、モルホリノ基、ピペリジノ基等のジアルキルアミノ基、フェニルアミノ基、p−トリルアミノ基等のアリールアミノ基、メチル基、エチル基、tert−ブチル基、ドデシル基等のアルキル基、フェニル基、p−トリル基、キシリル基、クメニル基、ナフチル基、アンスリル基、フェナントリル基等のアリール基等の他、ヒドロキシル基、カルボキシル基、スルホンアミド基、ホルミル基、メルカプト基、スルホ基、メシル基、p−トルエンスルホニル基、アミノ基、ニトロ基、ニトロソ基、シアノ基、トリフルオロメチル基、トリクロロメチル基、トリメチルシリル基、ホスフィニコ基、ホスホノ基、アルキルスルホニル基、アリールスルホニル基、トリアルキルアンモニウム基、ジメチルスルホニウミル基、トリフェニルフェナシルホスホニウミル基等が挙げられる。 Examples of such substituents include halogen groups such as fluorine atom, chlorine atom, bromine atom and iodine atom, alkoxy groups such as methoxy group, ethoxy group and tert-butoxy group, aryl groups such as phenoxy group and p-tolyloxy group. Oxy group, methoxycarbonyl group, butoxycarbonyl group, phenoxycarbonyl group, vinyloxycarbonyl group, alkoxycarbonyl group such as aryloxycarbonyl group, acetoxy group, propionyloxy group, acyloxy group such as benzoyloxy group, acetyl group, benzoyl group An arylsulfuric group such as an acyl group such as an isobutyryl group, an acryloyl group, a methacryloyl group or a methoxalyl group, an alkylsulfanyl group such as a methylsulfanyl group or a tert-butylsulfanyl group, a phenylsulfanyl group or a p-tolylsulfanyl group Nyl group, alkylamino group such as methylamino group, cyclohexylamino group, dimethylamino group, diethylamino group, morpholino group, dialkylamino group such as piperidino group, arylamino group such as phenylamino group, p-tolylamino group, methyl group Alkyl group such as ethyl group, tert-butyl group, dodecyl group, phenyl group, p-tolyl group, xylyl group, cumenyl group, naphthyl group, anthryl group, phenanthryl group and other aryl groups, hydroxyl group, carboxyl Group, sulfonamido group, formyl group, mercapto group, sulfo group, mesyl group, p-toluenesulfonyl group, amino group, nitro group, nitroso group, cyano group, trifluoromethyl group, trichloromethyl group, trimethylsilyl group, phosphinico group , Phosphono group, alkylsulfonyl group, aryl Examples include a sulfonyl group, a trialkylammonium group, a dimethylsulfonyl group, and a triphenylphenacylphosphoniumyl group.
このような置換基のうち、好ましい置換基として電子求引性の置換基が挙げられる。電子求引性の置換基が置換することにより、一般的にイオン性化合物は解離しやすくなり、帯電防止能は高くなる。 Among such substituents, a preferred substituent is an electron-withdrawing substituent. When the electron-withdrawing substituent is substituted, the ionic compound is generally easily dissociated and the antistatic ability is enhanced.
このような、電子求引性の置換基とは、共鳴効果や誘起効果によって相手から電子をひきつける置換基の総称であり、その多くは、ハメット側において、置換基定数σが正の値で示される。これらの置換基としては、特に制限はないが、具体的には、Chemical Review Vol.91、第165−195項 1991年発行に記載のσpが0より大きなものが挙げられ、より具体的には、ハロゲン基、シアノ基、カルボキシル基、ニトロ基、ニトロソ基、アシル基、アルキルオキシカルボニル基、アリールオキシカルボニル基、アルキルスルホニル基、アリールスルホニル基、トリアルキルアンモニウム基、アミド基、ペルフルオロアルキル基、ペルフルオロアルキルチオ基、ペルフルオロアルキルカルボニル基、スルホンアミド基、4−シアノフェニル基等があげられる。 Such electron-attracting substituents are generic names for substituents that attract electrons from the other party due to resonance effects and induced effects, and many of them have a positive substituent constant σ on the Hammett side. It is. These substituents are not particularly limited, and specific examples thereof include Chemical Review Vol. 91, Nos. 165 to 195 σp described in 1991 is greater than 0, and more specifically, halogen group, cyano group, carboxyl group, nitro group, nitroso group, acyl group, alkyloxycarbonyl Group, aryloxycarbonyl group, alkylsulfonyl group, arylsulfonyl group, trialkylammonium group, amide group, perfluoroalkyl group, perfluoroalkylthio group, perfluoroalkylcarbonyl group, sulfonamide group, 4-cyanophenyl group and the like.
R1からR4は、化合物の安定性面から考慮して、好ましくは置換基を有してもよいアルキル基、置換基を有してもよいアリール基であり、より好ましくは、置換基を有してもよいアリール基である。 R 1 to R 4 are preferably an alkyl group which may have a substituent or an aryl group which may have a substituent, more preferably a substituent, in view of the stability of the compound. It is an aryl group that may have.
R5からR8は、化合物の安定性面から考慮して、置換基を有してもよいアルキル基が好ましい。 R 5 to R 8 are preferably an alkyl group which may have a substituent in consideration of the stability of the compound.
本発明において帯電防止付与剤(D)として用いられる、一般式[1]で表されるボロン系のアンモニウム塩系化合物(D1)の代表例を、例示化合物(D1−1)〜(D1−15)として以下の表1に、また、一般式[2]で表されるボロン系のアルカリ金属塩系化合物(D2)の代表例を、例示化合物(D2−1)〜(D2−4)として以下の表2にそれぞれ具体的に例示するが、これらに限られるものではない。 Representative examples of the boron-based ammonium salt compound (D1) represented by the general formula [1] used as the antistatic agent (D) in the present invention are exemplified compounds (D1-1) to (D1-15). In Table 1 below, and representative examples of boron-based alkali metal salt compounds (D2) represented by the general formula [2] are shown below as exemplified compounds (D2-1) to (D2-4). These are specifically exemplified in Table 2 below, but are not limited thereto.
なお、例示化合物中のMeはメチル基、Etはエチル基、Buはノルマルブチル基、c−Hexはシクロヘキシル基、Phはフェニル基を示す。 In the exemplified compounds, Me represents a methyl group, Et represents an ethyl group, Bu represents a normal butyl group, c-Hex represents a cyclohexyl group, and Ph represents a phenyl group.
帯電防止付与剤(D)の添加量としては、アクリル系ポリマー(A)100重量部に対して0.001〜20重量部が好ましく、0.01〜10重量部がより好ましい。0.001重量部未満では、帯電防止機能が期待できない。20重量部を超えると粘着物性が低下する場合がある。また、帯電防止付与剤(D)は単独、または複数組み合わせて使用することも可能である。 As addition amount of antistatic provision agent (D), 0.001-20 weight part is preferable with respect to 100 weight part of acrylic polymer (A), and 0.01-10 weight part is more preferable. If it is less than 0.001 part by weight, an antistatic function cannot be expected. If it exceeds 20 parts by weight, the physical properties of the adhesive may deteriorate. The antistatic agent (D) can be used alone or in combination.
本発明の帯電防止性アクリル系感圧式接着剤には、さらにシランカップリング剤(C)を配合することが好ましい。
シランカップリング剤(C)としては、ビニルトリメトキシシラン、ビニルトリエトキシシラン、メタクリロキシプロピルトリメトキシシラン、γ−メタクリロキシプロピルメチルジメトキシシラン、γ−グリシドキシプロピルトリメトキシシラン、γ−グリシドキシプロピルメチルジメトキシシラン、γ−グリシドキシプロピルメチルジエトキシシラン、2−(3,4−エポキシシクロヘキシル)エチルトリメトキシシラン、γ−アミノプロピルトリメトキシシラン、γ−アミノプロピルトリエトキシシラン、γ−アミノプロピルメチルメトキシシラン、N−(2−アミノエチル)3−アミノプロピルトリメトキシシラン、N−(2−アミノエチル)3−アミノプロピルメチルジメトキシシラン、γ−メルカプトプロピルトリメトキシシラン、γ−メルカプトプロピルトリエトキシシラン、メルカプトブチルトリメトキシシラン、γ−メルカプトプロピルメチルジメトキシシラン等が挙げられる。
シランカップリング剤は、感圧式接着層とガラスとの接着性向上に効果があり、高温高湿度下における感圧式接着フィルムの浮き・剥がれ、発泡等の発生防止に特に効果を奏するものである。
The antistatic acrylic pressure-sensitive adhesive of the present invention preferably further contains a silane coupling agent (C).
As the silane coupling agent (C), vinyltrimethoxysilane, vinyltriethoxysilane, methacryloxypropyltrimethoxysilane, γ-methacryloxypropylmethyldimethoxysilane, γ-glycidoxypropyltrimethoxysilane, γ-glycid Xylpropylmethyldimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, γ-aminopropyltrimethoxysilane, γ-aminopropyltriethoxysilane, γ- Aminopropylmethylmethoxysilane, N- (2-aminoethyl) 3-aminopropyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ Mercaptopropyl triethoxysilane, mercaptomethyl-butyl trimethoxy silane, .gamma.-mercaptopropyl methyl dimethoxy silane, and the like.
The silane coupling agent is effective in improving the adhesion between the pressure-sensitive adhesive layer and the glass, and is particularly effective in preventing the pressure-sensitive adhesive film from floating / peeling and foaming under high temperature and high humidity.
帯電防止性アクリル系感圧式接着剤中のシランカップリング剤(C)の含有量は、アクリル系ポリマー(A)100重量部に対して、0.01〜2重量部が好ましい。0.01重量部未満であると、その物性の改善効果が乏しく、2重量部を越えると、感圧式接着剤が高価になるのみならず、浮き・剥がれ、発泡等の原因となる。 The content of the silane coupling agent (C) in the antistatic acrylic pressure-sensitive adhesive is preferably 0.01 to 2 parts by weight with respect to 100 parts by weight of the acrylic polymer (A). If the amount is less than 0.01 parts by weight, the effect of improving the physical properties is poor. If the amount exceeds 2 parts by weight, the pressure-sensitive adhesive is not only expensive, but also causes floating, peeling and foaming.
前記アクリル系ポリマー(A)、前記化合物(B)、前記帯電防止付与剤(D1)、(D2)の混合は、前記アクリル系ポリマーを溶液重合により調製した場合は、重合完了後のアクリル系ポリマー溶液に化合物(B)および帯電防止付与剤(D1)、(D2)を添加すれば良く、前記アクリル系ポリマーを塊状重合により調製する場合は、重合完了後では均一混合が困難になるため、重合の途中で混合することが好ましい。 When the acrylic polymer (A), the compound (B), and the antistatic agent (D1) and (D2) are mixed by preparing the acrylic polymer by solution polymerization, the acrylic polymer after polymerization is completed. Compound (B) and antistatic imparting agents (D1) and (D2) may be added to the solution. When the acrylic polymer is prepared by bulk polymerization, uniform mixing becomes difficult after completion of the polymerization. It is preferable to mix in the middle.
次に、本発明の帯電防止性アクリル系感圧式接着フィルムについて説明する。
本発明の感圧式接着フィルムは、本発明の帯電防止性アクリル系感圧式接着剤からなる帯電防止性アクリル系感圧式接着層が、各種表示部材に用いられる光学フィルムの少なくとも一方の面に形成されているものである。本発明の感圧式接着フィルムは、各種表示部材の形成に好適に用いられる。例えば、液晶表示部材のガラスに対して、好適に貼付し、使用される。
Next, the antistatic acrylic pressure-sensitive adhesive film of the present invention will be described.
The pressure-sensitive adhesive film of the present invention has an antistatic acrylic pressure-sensitive adhesive layer comprising the antistatic acrylic pressure-sensitive adhesive of the present invention formed on at least one surface of an optical film used for various display members. It is what. The pressure-sensitive adhesive film of the present invention is suitably used for forming various display members. For example, it is suitably affixed and used on the glass of a liquid crystal display member.
光学フィルムとしては、偏光フィルム、位相差フィルム、楕円偏光フィルム、反射防止フィルム、輝度向上フィルム、光拡散フィルム、ガラス飛散防止及び表面保護フィルム等が挙げられ、特に偏光フィルム、位相差フィルム、楕円偏光フィルムが好ましい。 Examples of the optical film include a polarizing film, a retardation film, an elliptically polarizing film, an antireflection film, a brightness enhancement film, a light diffusing film, a glass scattering prevention and a surface protective film, etc., and in particular, a polarizing film, a retardation film, and an elliptically polarizing film. A film is preferred.
本発明の感圧式接着剤を上記の光学フィルムに塗工し、乾燥して感圧式接着層を形成し、剥離シートを積層し、必要に応じてエージングすることによって、感圧式接着シートを得ることができる。
あるいは、光学フィルム上の感圧式接着層の形成は、感圧式接着剤を剥離シートに塗工し、乾燥して感圧式接着層を形成し、光学フィルムを貼り合わせて前記感圧式接着層を光学フィルム上に転写する、いわゆる「転写法」によることもできる。
A pressure-sensitive adhesive sheet is obtained by applying the pressure-sensitive adhesive of the present invention to the above optical film, drying to form a pressure-sensitive adhesive layer, laminating a release sheet, and aging as necessary. Can do.
Alternatively, the pressure-sensitive adhesive layer on the optical film can be formed by applying a pressure-sensitive adhesive to the release sheet, drying to form a pressure-sensitive adhesive layer, and bonding the optical film to make the pressure-sensitive adhesive layer optical. It is also possible to use a so-called “transfer method” in which the image is transferred onto a film.
感圧式接着層の形成は、通常使用されている塗布装置を用いて行なうことができる。塗布装置としては、例えば、ロールナイフコーター、ダイコーター、ロールコーター、バーコーター、グラビアロールコーター、リバースロールコーター、ディッピング、ブレードコーターなどが挙げられる。 The pressure-sensitive adhesive layer can be formed using a commonly used coating apparatus. Examples of the coating apparatus include a roll knife coater, a die coater, a roll coater, a bar coater, a gravure roll coater, a reverse roll coater, dipping, and a blade coater.
感圧式接着層の厚さは、特に制限されず、例えば、1〜40μm程度であることが好ましく、1〜30μmであることがより好適である。特に、薄型化、即ち、1〜15μm、さらには、1〜8μm程度に感圧式接着層を薄くした場合に顕著な効果を奏する。
即ち、感圧式接着剤の主成分として高分子量のアクリル系ポリマー(A)を用いることによって、感圧式接着層を薄くしても、粘着型光学フィルム端部での糊ズレを低く抑えることができる。また、粘着剤層が薄型化することで、低濃度での粘着剤の塗工が可能になり、粘着剤層の、ひいては粘着型光学フィルムの外観が向上する。さらには、糊の接着面積が小さくなり、糊欠けを抑えることができる。さらには、粘着型光学フィルムを打ち抜き加工する際に、粘着剤層がはみ出しにくくて、切断面における粘着剤のはみ出し付着が少なく、また、はみ出し付着の粘着剤に随伴した、糊欠けが生じにくくなる。
The thickness of the pressure-sensitive adhesive layer is not particularly limited, and is preferably about 1 to 40 μm, and more preferably 1 to 30 μm, for example. In particular, when the pressure-sensitive adhesive layer is thinned to a thickness of about 1 to 15 μm, more preferably about 1 to 8 μm, a remarkable effect is obtained.
That is, by using the high molecular weight acrylic polymer (A) as the main component of the pressure-sensitive adhesive, even when the pressure-sensitive adhesive layer is thinned, the glue shift at the end of the pressure-sensitive adhesive optical film can be kept low. . In addition, since the pressure-sensitive adhesive layer is reduced in thickness, it is possible to apply the pressure-sensitive adhesive at a low concentration, and the appearance of the pressure-sensitive adhesive layer and consequently the pressure-sensitive adhesive optical film is improved. Furthermore, the adhesive area of the glue is reduced, and it is possible to suppress glue chipping. Furthermore, when the adhesive optical film is punched, the pressure-sensitive adhesive layer is difficult to stick out, the sticking out of the pressure-sensitive adhesive on the cut surface is small, and the adhesive chipping associated with the sticking-out adhesive is less likely to occur. .
次に、実施例を挙げて本発明を更に説明するが、本発明はこれら実施例に限定されるも
のではない。なお、以下、部は重量部である。
EXAMPLES Next, although an Example is given and this invention is further demonstrated, this invention is not limited to these Examples. Hereinafter, parts are parts by weight.
[製造例1]
撹拌機、還流冷却器、温度計及び窒素導入管を備えた反応装置に、それぞれ表3に示す量のモノマー、重合開始剤として、アゾビスイソブチロニトリル(大塚化学社製)(以下「AIBN」と略記する)および酢酸エチル200重量部を仕込み、反応容器内の空気を窒素ガスで置換した。次いで、窒素雰囲気下で撹拌しながら55℃に昇温した後、8時間反応させ、Tgが−53.1℃、Mwが250万のアクリル系ポリマーの溶液を得た。なお、以降の製造例及び比較用製造例における各ポリマー溶液のTg、Mwは表3に記載した。
[Production Example 1]
A reactor equipped with a stirrer, a reflux condenser, a thermometer, and a nitrogen introduction tube was charged with azobisisobutyronitrile (manufactured by Otsuka Chemical Co., Ltd.) (hereinafter referred to as “AIBN”) as monomers and polymerization initiators in the amounts shown in Table 3, respectively. And 200 parts by weight of ethyl acetate were charged, and the air in the reaction vessel was replaced with nitrogen gas. Next, the mixture was heated to 55 ° C. with stirring in a nitrogen atmosphere, and then reacted for 8 hours to obtain an acrylic polymer solution having a Tg of −53.1 ° C. and an Mw of 2.5 million. The Tg and Mw of each polymer solution in the following production examples and comparative production examples are shown in Table 3.
なお、アクリル系ポリマー(A)のTgは、各単量体(すなわち配合した単量体)から得られる単独重合体のガラス転移温度をもとに、以下の式(1)(FOXの式)により求められる値とする。 The Tg of the acrylic polymer (A) is expressed by the following formula (1) (FOX formula) based on the glass transition temperature of a homopolymer obtained from each monomer (that is, a blended monomer). The value obtained by
1/Tg =〔(W1/Tg1)+(W2/Tg2)+・・・+(Wn/Tgn)〕/100 式(1)
(ここに温度は絶対温度である。)
Wn:単量体nの重量%
Tgn:単量体nからなる単独重合体のガラス転移温度
1 / Tg = [(W1 / Tg1) + (W2 / Tg2) +... + (Wn / Tgn)] / 100 Formula (1)
(The temperature here is absolute.)
Wn:% by weight of monomer n
Tgn: Glass transition temperature of homopolymer composed of monomer n
また、アクリル系ポリマー(A)のMw、Mw/Mnは、ゲルパーミエイション(GPC)測定で求めたポリスチレン換算の値である。 Mw and Mw / Mn of the acrylic polymer (A) are values in terms of polystyrene determined by gel permeation (GPC) measurement.
[製造例2〜8]、[比較用製造例1〜7]
製造例1において、モノマー部分の種類および使用量、重合開始剤の使用量を表3に示すように変更した以外は、製造例1と同様にしてアクリル系ポリマーの溶液を得た。
[Production Examples 2-8], [Comparative Production Examples 1-7]
In Production Example 1, an acrylic polymer solution was obtained in the same manner as in Production Example 1, except that the type and amount of the monomer part and the amount of polymerization initiator used were changed as shown in Table 3.
表3中の略号は、以下の通りである。 Abbreviations in Table 3 are as follows.
BA : ブチルアクリレート
2EHA : 2−エチルヘキシルアクリレート
MEA : 2−メトキシエチルアクリレート
ACMO : N−アクリロイルモルホリン
ACPI : N−アクリロイルピペリジン
2HEA : 2−ヒドロキシエチルアクリレート
4HBA : 4−ヒドロキシブチルアクリレート
AA : アクリル酸
BA: butyl acrylate 2EHA: 2-ethylhexyl acrylate MEA: 2-methoxyethyl acrylate ACMO: N-acryloylmorpholine ACPI: N-acryloylpiperidine 2HEA: 2-hydroxyethyl acrylate 4HBA: 4-hydroxybutyl acrylate AA: acrylic acid
<ボロン系帯電防止付与剤(D)の製造>
<製造例9> アンモニウム塩系の化合物(D1−1)の合成
ナトリウムテトラフェニルボレート 342gを、イオン交換水5Lに溶解させた。そこに、テトラブチルアンモニウムブロマイド 322gをイオン交換水5Lに溶解させたものを徐々に添加した。5時間攪拌した後、析出物をろ取することにより、下記式にて示される化合物(D1−1)を 373g得た。元素分析(組成式:C40H56BN 計算値(%):C, 85.53; H, 10.05; N, 2.49 実測値(%):C, 85.55; H, 10.52; N, 2.66)により確認した。
<Manufacture of boron-based antistatic agent (D)>
<Production Example 9> Synthesis of ammonium salt compound (D1-1) 342 g of sodium tetraphenylborate was dissolved in 5 L of ion-exchanged water. To this, 322 g of tetrabutylammonium bromide dissolved in 5 L of ion exchange water was gradually added. After stirring for 5 hours, the precipitate was collected by filtration to obtain 373 g of a compound (D1-1) represented by the following formula. Elemental analysis (Composition formula: C 40 H 56 BN Calculated value (%): C, 85.53; H, 10.05; N, 2.49 Actual value (%): C, 85.55; H, 10. 52; N, 2.66).
<製造例10〜22> 化合物(6)〜(18)の合成
ナトリウムテトラフェニルボレートの代わりに表6に示すボレートを、テトラブチルアンモニウムブロマイドの代わりに表4に示すアンモニウム塩を用いた他は製造例16と同様にして化合物(D1−2)、化合物(D1−4)から化合物(D1−15)を合成した。元素分析の測定結果を表5に示す
<Production Examples 10 to 22> Synthesis of Compounds (6) to (18) Production was performed except that the borate shown in Table 6 was used instead of sodium tetraphenylborate and the ammonium salt shown in Table 4 was used instead of tetrabutylammonium bromide. In the same manner as in Example 16, compound (D1-15) was synthesized from compound (D1-2) and compound (D1-4). Table 5 shows the results of elemental analysis.
[実施例1]
製造例1により得られたアクリル系ポリマー溶液中のアクリル系ポリマーの固形分100部に対して、イソシアネート系硬化剤(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)(以下「TDI」と略記する)を有効成分で0.2部、化合物(D1−1)を1.0部、3−グリシドキシプロピルトリメトキシシラン(以下「シランカップリング剤1」と略記する)0.1部を添加し、感圧式接着剤組成物の溶液を得た。後述する方法で、帯電防止性、追従性、耐久性、光漏れ防止性を評価した。
[Example 1]
An isocyanate curing agent (trimethylolpropane adduct of tolylene diisocyanate) (hereinafter abbreviated as “TDI”) is applied to 100 parts of the solid content of the acrylic polymer in the acrylic polymer solution obtained in Production Example 1. 0.2 parts of the active ingredient, 1.0 part of the compound (D1-1), 0.1 part of 3-glycidoxypropyltrimethoxysilane (hereinafter abbreviated as “silane coupling agent 1”) are added, A solution of a pressure sensitive adhesive composition was obtained. Antistatic properties, followability, durability, and light leakage prevention properties were evaluated by the methods described below.
[実施例2〜24]、[比較例1〜8]
実施例1と同様にして、表6、7に示すように製造例2〜8及び比較用製造例1〜7のアクリル系ポリマー溶液の固形分100部に対して、イソシアネート系架橋剤、シランカップリング剤、帯電防止付与剤を添加し感圧式接着剤組成物の溶液を得た。
[Examples 2 to 24], [Comparative Examples 1 to 8]
In the same manner as in Example 1, as shown in Tables 6 and 7, with respect to 100 parts of the solid content of the acrylic polymer solutions of Production Examples 2 to 8 and Comparative Production Examples 1 to 7, an isocyanate crosslinking agent and a silane cup A ring agent and an antistatic agent were added to obtain a solution of a pressure sensitive adhesive composition.
また、得られた感圧式接着剤組成物を用い、実施例1と同様にして光学部材を得、同様に評価した。この結果を表6、7にまとめて示す。 Further, using the obtained pressure-sensitive adhesive composition, an optical member was obtained in the same manner as in Example 1 and evaluated in the same manner. The results are summarized in Tables 6 and 7.
<帯電防止性(表面抵抗値)>
各実施例、比較例で得られた感圧式接着剤組成物を、剥離フィルムに塗工して、120℃のオーブンにて乾燥して、厚さ5μmの感圧式接着剤層を設けた後に、更に厚さ50μmのポリエステルフィルムを貼り合わせ、感圧式接着フィルムを得た。剥離フィルムを剥がし、露出した感圧式接着層表面の表面抵抗値を、23℃−45%RH、23℃−55%RHの各条件下で、表面抵抗値測定装置(三菱化学株式会社製)を用いて測定した(単位:Ω/□)。なお、「2.1E+09」は「2.1×109」の意である。
<Antistatic property (surface resistance value)>
After applying the pressure-sensitive adhesive composition obtained in each Example and Comparative Example to a release film and drying in a 120 ° C. oven to provide a pressure-sensitive adhesive layer having a thickness of 5 μm, Further, a 50 μm thick polyester film was bonded to obtain a pressure-sensitive adhesive film. Peel off the release film, and measure the surface resistance value of the exposed pressure-sensitive adhesive layer surface under the conditions of 23 ° C.-45% RH and 23 ° C.-55% RH. (Unit: Ω / □). “2.1E + 09” means “2.1 × 10 9 ”.
<追従性>
表面抵抗値測定用と同様の試料(感圧式接着フィルム)であって、A4サイズの試料から剥離フィルムを剥がし、露出した感圧式接着層を偏光板に23℃−50%RHにて、長辺センター部を1cm幅で線状に部分貼着した後に、両端を放し、端部までの全面が空気を巻き込むことなく自重で速やかに且つ滑らかに貼着するまでの時間を測定して評価した。
<Followability>
It is the same sample (pressure-sensitive adhesive film) as that for surface resistance measurement, and the release film is peeled off from the A4 size sample, and the exposed pressure-sensitive adhesive layer is applied to the polarizing plate at 23 ° C.-50% RH, the long side After the center portion was partially adhered in a linear shape with a width of 1 cm, both ends were released, and the time until the entire surface up to the end portion was quickly and smoothly adhered by its own weight without involving air was measured and evaluated.
30秒以下 : ◎
30〜60秒 : ○
60秒以上 : △
30 seconds or less: ◎
30-60 seconds: ○
60 seconds or more: △
<耐久性(耐熱性、耐湿熱性)の評価方法>
各実施例、比較例で得られた感圧式接着剤組成物を、剥離フィルムに塗工して、120℃のオーブンにて乾燥して、厚さ5μmの感圧式接着剤層を設けた後、上記接着剤層に、ポリビニルアルコール(PVA)系偏光子の両面をトリアセチルセルロース系保護フィルム(以下、「TACフィルム」という)で挟んだ多層構造の偏光フィルムの片面を貼り合せ、「剥離フィルム/接着剤層/TACフィルム/PVA/TACフィルム」なる構成の積層体を得た。
次いで、得られた積層体を温度23℃相対湿度50%の条件で1週間熟成(暗反応)させて、接着剤層の反応を進行させ、接着加工した偏光板(積層体)を得た。
接着加工した偏光板(積層体)を(2.5inch×2.5inch)の大きさに裁断し、剥離フィルムを剥がし、厚さ1.1mmのフロートガラス板の両面に、それぞれの偏光板の吸収軸が直交するようにラミネーターを用いて貼着した。続いて、この偏光板が貼り付けられたガラス板を50℃−5気圧の条件のオートクレーブ内に20分保持させて、偏光板をガラス板に強固に密着させ、偏光板とガラス板との積層物を得た。
同様の積層物を2枚作成し、それぞれ、温度85℃の条件下で500時間(耐熱性)、及び温度60℃、湿度95%RHの条件下で500時間(耐湿熱性)、放置し、以下の基準で、発泡、はがれ、亀裂の発生等を目視で観察し評価した。
○:発泡、はがれ、亀裂等の外観不良が認められなかった
△:発泡、はがれ、亀裂等の外観不良がわずかに認められた
×:発泡、はがれ、亀裂等の外観不良が明らかに認められた
<Evaluation method of durability (heat resistance, moist heat resistance)>
After applying the pressure-sensitive adhesive composition obtained in each Example and Comparative Example to a release film and drying in a 120 ° C. oven to provide a pressure-sensitive adhesive layer having a thickness of 5 μm, One side of a multilayered polarizing film in which both sides of a polyvinyl alcohol (PVA) polarizer are sandwiched between triacetylcellulose-based protective films (hereinafter referred to as “TAC film”) is bonded to the adhesive layer, and a “release film / A laminate having a configuration of “adhesive layer / TAC film / PVA / TAC film” was obtained.
Next, the obtained laminate was aged (dark reaction) for one week under the condition of a temperature of 23 ° C. and a relative humidity of 50%, and the reaction of the adhesive layer was advanced to obtain a bonded polarizing plate (laminate).
The bonded polarizing plate (laminated body) is cut into a size of (2.5 inch × 2.5 inch), the release film is peeled off, and the absorption of each polarizing plate is performed on both surfaces of a 1.1 mm thick float glass plate. The laminator was used to stick the axes so that they were orthogonal. Subsequently, the glass plate on which the polarizing plate is attached is held in an autoclave at 50 ° C.-5 atm for 20 minutes to firmly adhere the polarizing plate to the glass plate, and the polarizing plate and the glass plate are laminated. I got a thing.
Two similar laminates were prepared and left for 500 hours (heat resistance) at a temperature of 85 ° C. and 500 hours (heat and heat resistance) at a temperature of 60 ° C. and a humidity of 95% RH, respectively. The occurrence of foaming, peeling, cracking, etc. was visually observed and evaluated.
○: Appearance defects such as foaming, peeling and cracking were not observed Δ: Appearance defects such as foaming, peeling and cracking were slightly observed ×: Appearance defects such as foaming, peeling and cracking were clearly recognized
<耐久性(冷熱サイクル耐久性)の評価方法>
耐熱性、耐湿熱性評価に用いたのと同様の、偏光板とガラス板との積層物について、エスペック株式会社製 冷熱衝撃装置TSA−71L−Aを用いて、−40℃で30分、80℃で30分を1サイクルとする冷熱サイクルを200回繰り返し、光学部材の発泡、浮き、ハガレの有無を目視で観察し、以下の基準で評価した。
○:発泡、浮き、ハガレ等の外観不良が見られなかった
△:発泡、浮き、ハガレ等の外観不良がわずかに見られた
×:発泡、浮き、ハガレが確認された
<Durability (cooling cycle durability) evaluation method>
About the same laminate as a polarizing plate and a glass plate used for heat resistance and wet heat resistance evaluation, using a thermal shock apparatus TSA-71L-A manufactured by Espec Co., Ltd., at −40 ° C. for 30 minutes, 80 ° C. The cooling cycle with 30 minutes as one cycle was repeated 200 times, and the presence or absence of foaming, floating, and peeling of the optical member was visually observed and evaluated according to the following criteria.
○: Appearance defects such as foaming, floating and peeling were not observed. Δ: Appearance defects such as foaming, floating and peeling were slightly observed. ×: Foaming, floating and peeling were confirmed.
<光漏れ防止性の評価方法>
耐熱性、耐湿熱性評価に用いたのと同様の、偏光板とガラス板との積層物(8inch×8inch)を、80℃の条件下で100時間放置し、光漏れ防止性を目視で観察し、以下の基準で評価した。
○:光漏れは見られなかった。
×:明らかな光漏れが見られた。
<Evaluation method for light leakage prevention>
The same laminate (8inch x 8inch) of polarizing plate and glass plate used for evaluation of heat resistance and moist heat resistance is allowed to stand for 100 hours at 80 ° C, and the light leakage prevention property is visually observed. The evaluation was based on the following criteria.
○: No light leakage was observed.
X: Obvious light leakage was observed.
表6、7中、化合物(B)、シランカップリング剤(C)の名称は以下の通りである。
TDI :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
シランカップリング剤1:3−グリシドキシプロピルトリメトキシシラン
表6、7に示した評価結果から明らかなように、本発明の感圧式接着剤を用いた感圧式接着シートには、アワ、ハガレが発生せず、耐久性に優れ、また、剥離時に帯電しにくい感圧式接着剤層の形成が可能となった。一方、比較例の感圧式接着シートは、耐久性、帯電防止性、光漏れ防止性の何れかに欠点が見られた。
In Tables 6 and 7, the names of the compound (B) and the silane coupling agent (C) are as follows.
TDI: Trimethylolpropane adduct silane coupling agent of tolylene diisocyanate 1: 3-glycidoxypropyltrimethoxysilane As apparent from the evaluation results shown in Tables 6 and 7, the pressure-sensitive adhesive of the present invention was used. The pressure-sensitive adhesive sheet was free from flaking and peeling, and was excellent in durability, and it was possible to form a pressure-sensitive adhesive layer that was difficult to be charged when peeled off. On the other hand, the pressure-sensitive adhesive sheet of the comparative example has a defect in any of durability, antistatic property and light leakage preventing property.
本発明の感圧式接着剤によれば、薄型化しても耐久性に優れ、剥離による帯電の防止、過酷な条件下での剥がれを抑制可能な感圧式接着シートを提供することができる。感圧式接着剤を薄くできるので、感圧式接着シートとしての総厚さを低く抑えることができる。その結果、偏光フィルム、位相差フィルム等の複数の光学フィルムを積層した複合光学フィルム全体の厚みを薄くすることができ、表示部材全体の厚みを薄くすることができる。 According to the pressure-sensitive adhesive of the present invention, it is possible to provide a pressure-sensitive adhesive sheet that is excellent in durability even when it is thinned, can be prevented from being charged by peeling, and can be prevented from being peeled off under severe conditions. Since the pressure sensitive adhesive can be thinned, the total thickness of the pressure sensitive adhesive sheet can be kept low. As a result, the overall thickness of the composite optical film in which a plurality of optical films such as a polarizing film and a retardation film are laminated can be reduced, and the thickness of the entire display member can be reduced.
Claims (8)
上記アクリル系ポリマー(A)が、少なくとも、アルキル(メタ)アクリレート(a1):83〜96重量%、複素環及び重合性官能基含有モノマー(a2):0〜10重量%、水酸基含有モノマー(a3):0.05〜10重量%、カルボキシル基含有モノマー:0.5〜7重量%(a4)を共重合してなる、ガラス転移温度が−60〜0℃であって、重量平均分子量が160万以上280万未満であり、
上記化合物(D1)が下記一般式(1)で表され、上記化合物(D2)が下記一般式(2)で表される、ことを特徴とする帯電防止性アクリル系感圧式接着剤。
一般式(2)中、A+は、アルカリ金属イオンを表す。) An antistatic acrylic pressure-sensitive adhesive containing an acrylic polymer (A), a compound (B) having a functional group capable of reacting with a hydroxyl group or a carboxyl group, and a compound (D1) or a compound (D2). And
The acrylic polymer (A) is at least alkyl (meth) acrylate (a1): 83 to 96 wt%, heterocyclic and polymerizable functional group-containing monomer (a2): 0 to 10 wt%, hydroxyl group-containing monomer (a3 ): 0.05 to 10% by weight, carboxyl group-containing monomer: 0.5 to 7% by weight (a4) copolymerized, glass transition temperature is −60 to 0 ° C., and weight average molecular weight is 160. 10,000 to less than 2.8 million,
An antistatic acrylic pressure-sensitive adhesive, wherein the compound (D1) is represented by the following general formula (1) and the compound (D2) is represented by the following general formula (2).
In the general formula (2), A + represents an alkali metal ion. )
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