WO2013081145A1 - 積層体 - Google Patents
積層体 Download PDFInfo
- Publication number
- WO2013081145A1 WO2013081145A1 PCT/JP2012/081188 JP2012081188W WO2013081145A1 WO 2013081145 A1 WO2013081145 A1 WO 2013081145A1 JP 2012081188 W JP2012081188 W JP 2012081188W WO 2013081145 A1 WO2013081145 A1 WO 2013081145A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- meth
- film
- acrylic acid
- monomer
- moth
- Prior art date
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- 239000000178 monomer Substances 0.000 claims abstract description 143
- 230000001681 protective effect Effects 0.000 claims abstract description 89
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 63
- 239000000463 material Substances 0.000 claims abstract description 53
- 229920003067 (meth)acrylic acid ester copolymer Polymers 0.000 claims abstract description 43
- 239000012790 adhesive layer Substances 0.000 claims abstract description 39
- 238000005227 gel permeation chromatography Methods 0.000 claims abstract description 21
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 19
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000004132 cross linking Methods 0.000 claims abstract description 13
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 10
- 230000000379 polymerizing effect Effects 0.000 claims abstract description 8
- 125000000524 functional group Chemical group 0.000 claims abstract description 7
- 125000006165 cyclic alkyl group Chemical group 0.000 claims abstract description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 81
- 239000010410 layer Substances 0.000 claims description 52
- 238000009826 distribution Methods 0.000 claims description 19
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 11
- 239000012948 isocyanate Substances 0.000 claims description 11
- 150000002513 isocyanates Chemical class 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 10
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 9
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims description 4
- 125000002768 hydroxyalkyl group Chemical group 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 abstract description 61
- 230000001070 adhesive effect Effects 0.000 abstract description 61
- 230000001747 exhibiting effect Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 316
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 168
- -1 acrylic ester Chemical class 0.000 description 63
- 229920001577 copolymer Polymers 0.000 description 58
- 238000000034 method Methods 0.000 description 57
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 39
- 239000000203 mixture Substances 0.000 description 37
- 238000010526 radical polymerization reaction Methods 0.000 description 30
- 229920005989 resin Polymers 0.000 description 26
- 239000011347 resin Substances 0.000 description 26
- 238000006116 polymerization reaction Methods 0.000 description 23
- 239000000243 solution Substances 0.000 description 22
- 238000010586 diagram Methods 0.000 description 21
- 239000000758 substrate Substances 0.000 description 21
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 17
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 16
- XEKOWRVHYACXOJ-UHFFFAOYSA-N ethyl acetate Substances CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 16
- 125000000217 alkyl group Chemical group 0.000 description 15
- 239000000047 product Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 239000002904 solvent Substances 0.000 description 14
- 150000003498 tellurium compounds Chemical class 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 230000002829 reductive effect Effects 0.000 description 13
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 125000003118 aryl group Chemical group 0.000 description 12
- 238000011109 contamination Methods 0.000 description 12
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 12
- 239000011521 glass Substances 0.000 description 11
- 238000005259 measurement Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 229910052782 aluminium Inorganic materials 0.000 description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 229910052757 nitrogen Inorganic materials 0.000 description 10
- 239000007787 solid Substances 0.000 description 10
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- 125000003277 amino group Chemical group 0.000 description 9
- 230000008859 change Effects 0.000 description 9
- 239000013522 chelant Substances 0.000 description 9
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- 239000005020 polyethylene terephthalate Substances 0.000 description 9
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 8
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 8
- 238000005530 etching Methods 0.000 description 8
- 229920000642 polymer Polymers 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 125000003107 substituted aryl group Chemical group 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
- NDWUBGAGUCISDV-UHFFFAOYSA-N 4-hydroxybutyl prop-2-enoate Chemical compound OCCCCOC(=O)C=C NDWUBGAGUCISDV-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- KBLWLMPSVYBVDK-UHFFFAOYSA-N cyclohexyl prop-2-enoate Chemical compound C=CC(=O)OC1CCCCC1 KBLWLMPSVYBVDK-UHFFFAOYSA-N 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 7
- 239000003505 polymerization initiator Substances 0.000 description 7
- 125000001424 substituent group Chemical group 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 6
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 description 6
- 238000002048 anodisation reaction Methods 0.000 description 6
- 239000007869 azo polymerization initiator Substances 0.000 description 6
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 6
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 6
- 125000005740 oxycarbonyl group Chemical group [*:1]OC([*:2])=O 0.000 description 6
- 239000005056 polyisocyanate Substances 0.000 description 6
- 229920001228 polyisocyanate Polymers 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 229920005604 random copolymer Polymers 0.000 description 6
- OZAIFHULBGXAKX-VAWYXSNFSA-N AIBN Substances N#CC(C)(C)\N=N\C(C)(C)C#N OZAIFHULBGXAKX-VAWYXSNFSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 5
- 229920000178 Acrylic resin Polymers 0.000 description 5
- 239000004925 Acrylic resin Substances 0.000 description 5
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 5
- 239000004593 Epoxy Substances 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 230000032683 aging Effects 0.000 description 5
- 238000007743 anodising Methods 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 230000002209 hydrophobic effect Effects 0.000 description 5
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 5
- 229920001223 polyethylene glycol Polymers 0.000 description 5
- 239000007870 radical polymerization initiator Substances 0.000 description 5
- 239000011342 resin composition Substances 0.000 description 5
- 238000006467 substitution reaction Methods 0.000 description 5
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 4
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 4
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 4
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 4
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 4
- 239000002202 Polyethylene glycol Substances 0.000 description 4
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 4
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 4
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 4
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O ammonium group Chemical group [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- 238000013459 approach Methods 0.000 description 4
- 125000006615 aromatic heterocyclic group Chemical group 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 4
- 125000003754 ethoxycarbonyl group Chemical group C(=O)(OCC)* 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 239000003999 initiator Substances 0.000 description 4
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 description 4
- 125000001160 methoxycarbonyl group Chemical group [H]C([H])([H])OC(*)=O 0.000 description 4
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 229920005672 polyolefin resin Polymers 0.000 description 4
- 229920002635 polyurethane Polymers 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 4
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 4
- ARXJGSRGQADJSQ-UHFFFAOYSA-N 1-methoxypropan-2-ol Chemical compound COCC(C)O ARXJGSRGQADJSQ-UHFFFAOYSA-N 0.000 description 3
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 3
- 229920002284 Cellulose triacetate Polymers 0.000 description 3
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- 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 compound 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 3
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 description 3
- 150000001336 alkenes Chemical class 0.000 description 3
- 125000003545 alkoxy group Chemical group 0.000 description 3
- 125000003368 amide group Chemical group 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000010560 atom transfer radical polymerization reaction Methods 0.000 description 3
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000003851 corona treatment Methods 0.000 description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 description 3
- 238000007865 diluting Methods 0.000 description 3
- 125000005843 halogen group Chemical group 0.000 description 3
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- SFLRURCEBYIKSS-UHFFFAOYSA-N n-butyl-2-[[1-(butylamino)-2-methyl-1-oxopropan-2-yl]diazenyl]-2-methylpropanamide Chemical compound CCCCNC(=O)C(C)(C)N=NC(C)(C)C(=O)NCCCC SFLRURCEBYIKSS-UHFFFAOYSA-N 0.000 description 3
- 125000001624 naphthyl group Chemical group 0.000 description 3
- 229940059574 pentaerithrityl Drugs 0.000 description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 125000002467 phosphate group Chemical group [H]OP(=O)(O[H])O[*] 0.000 description 3
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 3
- 239000011112 polyethylene naphthalate Substances 0.000 description 3
- 239000011116 polymethylpentene Substances 0.000 description 3
- 229920000306 polymethylpentene Polymers 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 3
- 239000005871 repellent Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 229910052714 tellurium Inorganic materials 0.000 description 3
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical group C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 2
- AVTLBBWTUPQRAY-UHFFFAOYSA-N 2-(2-cyanobutan-2-yldiazenyl)-2-methylbutanenitrile Chemical compound CCC(C)(C#N)N=NC(C)(CC)C#N AVTLBBWTUPQRAY-UHFFFAOYSA-N 0.000 description 2
- WYGWHHGCAGTUCH-UHFFFAOYSA-N 2-[(2-cyano-4-methylpentan-2-yl)diazenyl]-2,4-dimethylpentanenitrile Chemical compound CC(C)CC(C)(C#N)N=NC(C)(C#N)CC(C)C WYGWHHGCAGTUCH-UHFFFAOYSA-N 0.000 description 2
- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- GQTFHSAAODFMHB-UHFFFAOYSA-N 2-prop-2-enoyloxyethanesulfonic acid Chemical compound OS(=O)(=O)CCOC(=O)C=C GQTFHSAAODFMHB-UHFFFAOYSA-N 0.000 description 2
- SUYCKBOGLWSODS-UHFFFAOYSA-N 2-sulfonylpropanenitrile Chemical compound N#CC(C)=S(=O)=O SUYCKBOGLWSODS-UHFFFAOYSA-N 0.000 description 2
- VFXXTYGQYWRHJP-UHFFFAOYSA-N 4,4'-azobis(4-cyanopentanoic acid) Chemical compound OC(=O)CCC(C)(C#N)N=NC(C)(CCC(O)=O)C#N VFXXTYGQYWRHJP-UHFFFAOYSA-N 0.000 description 2
- SXIFAEWFOJETOA-UHFFFAOYSA-N 4-hydroxy-butyl Chemical group [CH2]CCCO SXIFAEWFOJETOA-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 2
- MZRVEZGGRBJDDB-UHFFFAOYSA-N N-Butyllithium Chemical compound [Li]CCCC MZRVEZGGRBJDDB-UHFFFAOYSA-N 0.000 description 2
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004695 Polyether sulfone Substances 0.000 description 2
- 244000028419 Styrax benzoin Species 0.000 description 2
- 235000000126 Styrax benzoin Nutrition 0.000 description 2
- 235000008411 Sumatra benzointree Nutrition 0.000 description 2
- KYIKRXIYLAGAKQ-UHFFFAOYSA-N abcn Chemical compound C1CCCCC1(C#N)N=NC1(C#N)CCCCC1 KYIKRXIYLAGAKQ-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 125000002015 acyclic group Chemical group 0.000 description 2
- 125000002252 acyl group Chemical group 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 125000002947 alkylene group Chemical group 0.000 description 2
- 150000001413 amino acids Chemical group 0.000 description 2
- 230000003373 anti-fouling effect Effects 0.000 description 2
- 230000003667 anti-reflective effect Effects 0.000 description 2
- FFBZKUHRIXKOSY-UHFFFAOYSA-N aziridine-1-carboxamide Chemical compound NC(=O)N1CC1 FFBZKUHRIXKOSY-UHFFFAOYSA-N 0.000 description 2
- 229960002130 benzoin Drugs 0.000 description 2
- 210000001217 buttock Anatomy 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 2
- 239000002738 chelating agent Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 2
- 125000004093 cyano group Chemical group *C#N 0.000 description 2
- DMEGYFMYUHOHGS-UHFFFAOYSA-N cycloheptane Chemical compound C1CCCCCC1 DMEGYFMYUHOHGS-UHFFFAOYSA-N 0.000 description 2
- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/622—Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids
- C08G18/6225—Polymers of esters of acrylic or methacrylic acid
- C08G18/6229—Polymers of hydroxy groups containing esters of acrylic or methacrylic acid with aliphatic polyalcohols
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/066—Copolymers with monomers not covered by C09J133/06 containing -OH groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
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- G02B1/105—
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2551/00—Optical elements
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
Definitions
- the present invention relates to a laminate. More specifically, the present invention relates to a laminate having a moth-eye film that can reduce surface reflection by being stuck on a substrate, and a protective film suitable for protecting the surface of the moth-eye film.
- the moth-eye structure has a fine pattern of concave and convex patterns that are smaller than the visible light wavelength on the surface of the article to be subjected to antireflection treatment, and is arranged without gaps.
- the change in refractive index at the boundary between the outside world (air) and the surface of the article is made pseudo-continuous, and almost all of the light is transmitted regardless of the refractive index interface. Light reflection can be almost eliminated (see, for example, Patent Documents 1 and 2).
- Such a moth-eye structure is generally used by being attached to the outermost surface of an article in order to transmit light by eliminating a change in the refractive index of the air interface in a pseudo manner.
- the anti-reflection characteristics of the moth-eye structure may be deteriorated due to external factors such as dirt and scratches in the manufacturing and distribution processes of the article.
- a protective film or a protective sheet in which a pressure-sensitive adhesive layer is laminated on a base material made of a synthetic resin is widely used in order to prevent dirt and scratches in production processes and shipping / transport processes of various members.
- weather resistance and light resistance are particularly required for films or sheets that protect members for outdoor use.
- the protective film or sheet must be peeled off after use, and can be firmly adhered and fixed to the adherend as long as necessary, while being easily peeled off during use. .
- the laminate with the protective film laminated may be placed in a high-temperature atmosphere or may undergo a washing process, and when it is peeled off while having higher adhesiveness. Therefore, it is required to be able to be peeled off without leaving a part of the adhesive layer on the adherend (removability).
- Patent Document 3 proposes a re-peeling pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer in which the loss tangent of the dynamic viscoelastic spectrum at a frequency of 1 Hz and ⁇ 50 ° C. to 150 ° C. exhibits a predetermined property.
- Patent Document 4 a styrene-isobutylene-styrene block copolymer, a styrene-isobutylene block copolymer, and a pressure-sensitive adhesive containing a tackifier on a base material made of a polyolefin resin via an intermediate layer Surface protective sheets consisting of layers have been proposed.
- use of the adhesive layer formed from the adhesive containing a rubber-type polymer is proposed.
- Patent Document 6 proposes a surface protective film having an adhesive layer made of a rubber-based resin component on a polyolefin base material having a predetermined bending stress coefficient.
- Patent Document 7 proposes a protective film in which an adhesive layer made of a rubber resin or an acrylic resin based on isoprene is laminated on a base material made of a polyolefin resin.
- Patent Document 8 a pressure-sensitive adhesive formed by sequentially laminating a fine unevenness erasing layer, a roughness developing layer, a base material layer, a first adhesive layer having a high elastic modulus, and a second adhesive layer having a low elastic modulus. Tape has been proposed.
- Patent Documents 9 and 10 propose a laminate in which a non-concave portion is provided on the same surface as the surface on which the moth-eye structure is formed, and adhesion and removability with the protective film are ensured by the portion. .
- Patent Document 11 as a protective film attached to an optical film having fine irregularities on the order of nanometers, the surface roughness Ra is 0.030 ⁇ m or less, and the logarithmic decay rate rise temperature in the measurement of rigid pendulum is ⁇ 35. It has been proposed to use a laminate including a pressure-sensitive adhesive layer at a temperature of ° C or higher.
- Patent Document 12 proposes a laminate in which a fixed film (protective film) is applied to a wire grid polarizing plate having a fine uneven structure comparable to that of a moth-eye structure.
- the laminate of the wire grid polarizing plate and the fixed film has a 90-degree peeling force after heating for 24 hours at 80 ° C. of 0.03 to 0.50 N / 25 mm, and parallel at 600 nm before and after peeling of the fixed film.
- permeability at the time of Nicol being 2% or less is proposed.
- Japanese Patent No. 4368384 Japanese Patent No. 4368415 JP 2009-057394 A JP 2010-214853 A JP 2011-013496 A JP 2010-077168 A JP 2011-006524 A JP 2011-042779 A JP 2010-107858 A JP 2010-120348 A JP 2011-088356 A JP 2011-033869 A
- the present inventors have made various studies on a laminate of an antireflection film (hereinafter also referred to as a moth-eye film) having a plurality of convex portions formed on the surface with intervals or pitch sizes of nano-order and a protective film. .
- a moth-eye film an antireflection film having a plurality of convex portions formed on the surface with intervals or pitch sizes of nano-order and a protective film.
- the protective film needs to be peeled off and used, but the conventional protective film is applied to the moth-eye film and peeled off after a certain period of time. If done, adhesive residue (contamination) of the adhesive occurs in the gaps between the irregularities of the moth-eye film, resulting in clogging of the irregularities, or insufficient adhesion to the surface of the fine irregularities, which causes problems such as easy peeling. I understood.
- the present invention has been made in view of the above-mentioned present situation, and provides a laminate having an antireflection film having a protective film excellent in temporary adhesiveness and having a protective film which is hardly peeled off after being peeled off. It is intended.
- the present inventors have conducted a detailed study on the cause of adhesive residue on the surface of the moth-eye film.
- a general low reflection film having a flat surface for example, an LR (Low Reflection) film, an AR (Anti), etc.
- LR Low Reflection
- AR Anti
- it is a pressure-sensitive adhesive that gives good adhesion when used for a reflection
- AG anti-glare
- the surface patterned with nano-order fine concavo-convex structure has a larger surface area than a normal smooth surface, a protective film with good adhesion to the concavo-convex surface is very strongly adhered, such as autoclaving.
- the pressure-sensitive adhesive that has penetrated deeply into the concavo-convex structure is peeled off, the pressure-sensitive adhesive inside the concavo-convex may be torn off and remain as contamination.
- the convex part of the moth-eye film has a nano-order fine structure, there is a possibility that performance changes may occur even with adhesive residue that is not problematic in the past. Due to these phenomena, the conventional re-peeling pressure-sensitive adhesive is difficult to use due to contamination, and the occurrence of contamination is particularly remarkable after autoclaving or heat treatment.
- the present inventors have intensively studied, and in preparing a pressure-sensitive adhesive obtained by crosslinking a copolymer having (meth) acrylic acid ester as a main component with a crosslinking agent, the weight average molecular weight of the copolymer is described above. Is limited to a certain range, the number of carbon atoms of the alkyl group, the mass ratio, etc. are limited for each of a plurality of types of monomers that are monomer components, and the low molecular weight is less than a certain molecular weight in the copolymer.
- one aspect of the present invention has an antireflection film (moth eye film) and a protective film attached on the antireflection film, and the surface of the antireflection film is between the apexes of adjacent convex portions.
- the protective film has a plurality of convex portions whose width is equal to or less than the visible light wavelength, the protective film has a support film and an adhesive layer in contact with the antireflection film, and the adhesive layer is a (meth) acrylic ester. It is a layer made of a material formed by crosslinking the copolymer (A) with a crosslinking agent (B).
- the (meth) acrylate copolymer (A) has a weight average molecular weight of 600,000 or more, 150
- the (meth) acrylic acid ester copolymer (A) has an acyclic alkyl group having 4 to 9 carbon atoms (meth) when the entire monomer component is 100% by mass.
- the configuration of the laminate is not particularly limited by other components as long as such components are essential.
- each component of the laminate and a preferred form thereof will be described in detail.
- the form which combined two or more each preferable form of the following laminated body is also a preferable form of the said laminated body.
- the said laminated body has an antireflection film and the protective film affixed on this antireflection film.
- the antireflection film can be applied to the base material to reduce reflection occurring on the surface of the base material.
- the laminate of the present invention can be applied to the front plate of the display device to It is possible to obtain a display device that performs good display with less reflection of surroundings (for example, a fluorescent lamp in a room) due to light reflection.
- the material of the base material to which the laminate is attached is not particularly limited, and examples thereof include glass, plastic, and metal. Whether the substrate is translucent or opaque is not limited. For an opaque base material, it becomes an anti-reflection effect on the surface of the opaque body. For example, in the case of a black base material, a jet black appearance is obtained, and in the case of a colored base material, a high color purity appearance is obtained. Therefore, an article having high design properties can be obtained.
- Articles in which the laminate is preferably used include constituent members of display devices (self-luminous display elements, non-self-luminous display elements, light sources, light diffusion sheets, prism sheets, polarizing reflection sheets, retardation plates, polarizing plates , Front plate, housing, etc.), lens, window glass, frame glass, show window, water tank, printed matter, photograph, painted article, lighting equipment, and the like.
- display devices self-luminous display elements, non-self-luminous display elements, light sources, light diffusion sheets, prism sheets, polarizing reflection sheets, retardation plates, polarizing plates , Front plate, housing, etc.
- lens window glass, frame glass, show window, water tank, printed matter, photograph, painted article, lighting equipment, and the like.
- the surface of the antireflection film has a plurality of convex portions in which the width between the vertices of adjacent convex portions is not more than the visible light wavelength.
- the “visible wavelength or shorter” means 380 nm or lower, which is the lower limit of a general visible light wavelength range, more preferably 300 nm or shorter, and still more preferably about 1 ⁇ 2 of the visible light wavelength. 200 nm or less. If the width between the vertices of the convex portion exceeds 400 nm, it may be colored with a blue wavelength component, but the influence is sufficiently suppressed by setting the width to 300 nm or less, and almost no effect by setting the width to 200 nm or less. Not receive.
- the said antireflection film may have another structure, for example, may have the film base material which supports the said convex part.
- a film base material may be comprised with the material different from the material which comprises a convex part, and may be translucent or opaque depending on a use.
- the antireflection film may have an adhesive layer for attaching the structure having the convex portion to an article to be applied.
- the said adhesion layer is formed in the surface on the opposite side to the surface in which the convex part was formed.
- the said antireflection film may be directly formed in the base material to apply, without using a film base material, an adhesion layer, etc.
- the said protective film has a support film and the adhesion layer which touches the said antireflection film.
- the protective film can be peeled off at the time of use after it is once affixed to an adherend (antireflection film), and has good adhesiveness and produces adhesive residue when the protective film is peeled off.
- the anti-reflection film characteristics are not deteriorated.
- the said adhesion layer is a layer which consists of a material formed by bridge
- the pressure-sensitive adhesive layer formed using a pressure-sensitive adhesive composition comprising this combination has good heat resistance, transparency and durability, and is suitably used as a protective film.
- the thickness of the pressure-sensitive adhesive layer is preferably 1 to 50 ⁇ m, and more preferably 3 to 10 ⁇ m from the viewpoint of workability, cost, and adhesive residue.
- the weight average molecular weight of the copolymer (A) is 600,000 or more and less than 1.5 million.
- a low molecular weight body component whose molecular weight is 100,000 or less
- the weight average molecular weight is 1,500,000 or more
- the polymerization is insufficiently controlled, the molecular weight distribution becomes large, and the proportion of low molecular weight substances may increase.
- the weight average molecular weight of the copolymer (A) can be confirmed based on a curve obtained by GPC measurement.
- weight average molecular weight 800,000 to 1,400,000, low molecular weight substances can be reduced, crosslinking reaction can be sufficiently performed, and contamination can be more preferably reduced.
- the weight average molecular weight is more preferably 1 million to 1.3 million.
- the copolymer (A) contains 70 to 70% of (meth) acrylic acid alkyl ester monomer (a) having a non-cyclic alkyl group having 4 to 9 carbon atoms based on 100% by mass of the entire monomer component. It is formed by polymerizing a monomer component containing 98% by mass. Thereby, suitable adhesive force can be provided to the obtained adhesion layer, ensuring introduction
- the copolymer (A) is a single component containing 1.5 to 25% by mass of the (meth) acrylic acid ester monomer (b) having an aliphatic ring when the entire monomer component is 100% by mass. It is formed by polymerizing body components. As a result, the cohesive force and storage elastic modulus of the adhesive layer are improved, and residual contamination due to tearing or the like can be prevented when the adhesive layer that has deeply penetrated into the concavo-convex structure is peeled off. In addition, when there is too much said (b) component, an adhesion layer will become hard too much and there exists a possibility that a moth eye surface may be damaged in the case of zipping (a peeling sound generate
- the copolymer (A) contains 0.5 to 5% by mass of the monomer (c) that is reactive with the crosslinking agent (B) when the total monomer component is 100% by mass. It is formed by polymerizing monomer components. Thereby, a copolymer (A) can fully bridge
- the content of the component (c) is more preferably 1 to 4% by mass, and still more preferably 2 to 3% by mass.
- the area of the entire copolymer (A) obtained by GPC measurement is 100%, the area ratio occupied by components having a molecular weight of 100,000 or less is less than 3.0%. Thereby, the adhesive residue to the uneven surface at the time of peeling off a protective film can fully be reduced.
- the crosslinking agent (B) in the pressure-sensitive adhesive composition may be at least one selected from the group consisting of an isocyanate crosslinking agent, an epoxy crosslinking agent, an aziridine crosslinking agent, and a metal chelate crosslinking agent. preferable. From the viewpoint that the crosslinking reaction is gentle and that the obtained pressure-sensitive adhesive layer can be provided with appropriate strength and flexibility, it is particularly preferable to use an isocyanate-based crosslinking agent as the crosslinking agent (B).
- the crosslinking agent (B) is an isocyanate-based crosslinking agent
- the monomer (c) having a functional group that is reactive with the crosslinking agent (B) in the copolymer (A) contains a hydroxyl group.
- a monomer is preferable, and hydroxyalkyl (meth) acrylate is particularly preferable.
- the (meth) acrylic monomer (c) is a carboxyl group-containing monomer or an amino group-containing monomer. It is preferable that Particularly preferred is an ethylenically unsaturated carboxylic acid for a carboxyl group-containing monomer, and monoalkylaminoalkyl (meth) acrylate for an amino group-containing monomer.
- the molecular weight distribution of the (meth) acrylic acid ester copolymer (A) is preferably 1.2 to 3.0. By setting it as this range, the generation amount of a low molecular weight component can be reduced, and it can prevent that a part of adhesion layer flows into the uneven
- the area of the whole (meth) acrylic acid ester copolymer (A) obtained by GPC measurement is 100%, the area ratio occupied by components having a molecular weight of 100,000 or less is 1.0% or more. It is preferable. In consideration of the production efficiency of the copolymer, it is preferably at least larger than this lower limit.
- the blending amount of the crosslinking agent (B) is preferably 0.01 to 15 parts by mass with respect to 100 parts by mass of the (meth) acrylic acid ester copolymer (A). By satisfying this range, it is possible to ensure both sufficient adhesive strength and prevention of occurrence of adhesive residue due to remaining unreacted crosslinking agent.
- the (meth) acrylic acid alkyl ester monomer (a) is preferably butyl acrylate.
- the (meth) acrylic acid ester monomer (b) having an aliphatic ring is preferably cyclohexyl (meth) acrylate.
- the gap between the plurality of convex portions of the antireflection film preferably has a sharp shape in the inner direction of the antireflection film.
- the gap between the plurality of convex portions is a concave portion formed between the plurality of convex portions.
- a plurality of pointed shapes may exist for one recess.
- the tip of the concave portion is sharp, the apparent shape of the convex portion due to adhesive residue (surface shape of the antireflection film) is likely to change and the antireflection property is likely to deteriorate compared to when the tip of the concave portion is flat.
- the shape with the sharp tip of the recess is superior in antireflection characteristics compared to the shape with a flat tip of the recess. Therefore, the protective film in this invention is used suitably for the antireflection film which has such a convex shape or a concave shape.
- the laminated body of a moth-eye film and the protective film which is excellent in the temporary adhesiveness with respect to a moth-eye film, and is hard to produce adhesive residue after peeling can be obtained.
- FIG. 1 is a schematic cross-sectional view of a moth-eye film of Embodiment 1.
- FIG. It is a cross-sectional schematic diagram which shows the shape of the recessed part which is the clearance gap between the convex parts of the moth-eye film in Embodiment 1, and has shown the shape where the front-end
- FIG. 20 is a schematic diagram showing a cross section taken along line A-A ′ in FIG. 19 and a cross section taken along line B-B ′ in FIG. 19. It is a schematic diagram which shows the principle in which the moth-eye film of Embodiment 1 implement
- 2 is a schematic cross-sectional view of a protective film of Embodiment 1.
- FIG. 1 is a schematic cross-sectional view of a laminate according to the first embodiment.
- the laminated body 10 of Embodiment 1 has the antireflection film 12 and the protective film 13 affixed on the said antireflection film 12.
- the laminated body of Embodiment 1 is affixed on the base material 11, and can reduce the reflection which arises on the base material 11 surface.
- a moth-eye film is used as the antireflection film 12, and most of the light incident on the surface of the moth-eye film 12 is the interface between the air and the moth-eye film 12 and the moth-eye film 12 and the base. Since the light is transmitted through the interface with the material 11, a far superior antireflection effect can be obtained as compared with the conventional light interference type antireflection film.
- the laminated body 10 in the first embodiment includes, for example, constituent members of a display device (self-luminous display element, non-self-luminous display element, light source, light diffusion sheet, prism sheet, polarizing reflection sheet, retardation plate, polarizing plate, (Front plate, housing, etc.), lens, window glass, frame glass, show window, water tank, printed matter, photograph, painted article, lighting equipment, and the like. Therefore, the material of the base material 11 is not particularly limited as long as the moth-eye film 12 can be placed thereon, such as glass, plastic, and metal. Whether the substrate 11 is translucent or opaque is not limited. For an opaque base material, it becomes an anti-reflection effect on the surface of the opaque body.
- the shape of the substrate 11 is not particularly limited, and examples thereof include melt molded products such as films, sheets, injection molded products, and press molded products.
- the protective film 13 is peeled off from the moth-eye film 12 and used.
- the outermost surface of various members that can be seen by humans With the surface on which the moth-eye film is arranged, it is possible to form a surface with excellent low reflection characteristics, and reflection of surroundings due to external light reflection Suppressed and good visibility can be obtained.
- the moth-eye film 12 is likely to be scratched or soiled due to external factors, which may cause the quality of the moth-eye film 12 to deteriorate. Therefore, in the first embodiment, the laminate 10 in which the protective film 13 is attached to the surface of the moth-eye film 12 is applied to the outermost surface of the article to protect the moth-eye film 12 from external factors.
- the surface of the moth-eye film 12 is a portion that is exposed to the outside after the protective film 13 is peeled off, and thus is easily soiled. Therefore, in order to facilitate the removal of dirt, it is preferable to use a hydrophilic surface by using the molding material of the moth-eye structure and the effect of increasing the surface area due to the fine structure. Thereby, it becomes easy to wipe off dirt and the moth-eye film 12 excellent in performance maintainability can be obtained.
- the protective film 13 in Embodiment 1 has a configuration in which the adhesive layer 22 is disposed on the support film 21, and the surface on which the adhesive layer 22 is disposed is on the surface of the moth-eye film 12 with the convex portion. It is pasted. According to the combination (laminate) of the protective film 13 and the moth-eye film 12 of Embodiment 1, the protective film 13 was affixed for a certain time due to the characteristics of the adhesive layer 22 described later, and then the protective film 13 was peeled off. Even in this case, since no adhesive remains between the irregularities of the moth-eye film 12, it prevents the antireflection effect from being lowered due to clogging of the irregularities of the moth-eye film 12, and maintains an excellent antireflection effect. Can do.
- the protective film in Embodiment 1 is a protective film suitable for a moth-eye film that protects the surface, has excellent adhesion, and does not contaminate the adherend during peeling.
- FIG. 2 is a schematic cross-sectional view of the moth-eye film of the first embodiment.
- the antireflection film 12 of Embodiment 1 is provided on a base material 11 that is an object of antireflection treatment.
- the surface of the moth-eye film 12 has an interval between the apexes of adjacent convex portions 12a (width of adjacent convex portions in the case of an aperiodic structure) or pitch (adjacent convex portions in the case of a periodic structure). It has a structure in which a plurality of convex portions 12a having a width (width) equal to or smaller than the visible light wavelength exist.
- the moth-eye film 12 includes such a convex portion 12a and a base portion 12b located below the convex portion 12a (on the base material 11 side).
- the width between the vertices of adjacent convex portions 12a is equal to or smaller than the visible light wavelength.
- the plurality of convex portions 12a are arranged on the surface of the moth-eye film 12 with an interval or a pitch equal to or smaller than the visible light wavelength.
- the base portion 12b has a resin residual film layer 12x generated when the convex portion 12a is molded, a film substrate 12y for forming and holding a moth-eye structure, and an adhesive layer 12z for bonding to the substrate 11. is doing.
- the resin residual film layer 12x is a residual film that has not become a part of the convex portion when the convex portion 12a is formed, and is made of the same material as the convex portion 12a.
- Examples of the material of the film substrate 12y include triacetyl cellulose, polyethylene terephthalate, cyclic olefin polymer (typically a product name “ZEONOR” (manufactured by ZEON Corporation) such as a norbornene resin, and a product name “ARTON”. (Manufactured by JSR) etc.) such as polyolefin resin, polypropylene, polymethylpentene, polycarbonate resin, polyethylene naphthalate, polyurethane, polyetherketone, polysulfone, polyethersulfone, polyester, polystyrene resin, acrylic resin, etc. A resin material or the like can be used.
- an anchor treatment layer, a hard coat layer, and the like for improving adhesion may be formed on the surface of the film substrate 12y.
- the material of the adhesive layer 12z is not particularly limited. On the surface of the adhesive layer 12z on the substrate 11 side, a separator film (for example, PET: polyethylene terephthalate) for protecting the adhesive layer 12z may be attached.
- a separator film for example, PET: polyethylene terephthalate
- 3 to 7 are schematic cross-sectional views showing the shape of a concave portion that is a gap between the convex portions of the moth-eye film in the first embodiment.
- 3 shows a shape in which the tip of the concave portion has a curvature and is sharp
- FIG. 4 shows a shape in which the tip of the concave portion is sharp
- FIG. 5 shows a shape in which the tip of the concave portion is sharply sharp
- 6 shows a shape in which the tip of the recess has a plurality of pointed shapes
- FIG. 7 shows that the tip of the recess is flat and the recess has a trapezoidal shape as a whole.
- the moth-eye film shown in FIG. 6 can be said to be a shape having small raised portions 12c between the plurality of convex portions 12a from the viewpoint of the convex portions.
- the moth-eye film 12 formed with a plurality of convex portions having the concave portions in the gaps shown in FIGS. 3 to 6 has a shape in which the tip of the concave portion 14 is pointed toward the inner side of the moth-eye film 12.
- the adhesive (stick mark) 23 has accumulated in a part of recessed part 14 which is the clearance gap between the convex parts 12a of the moth-eye film 12.
- FIG. When such adhesive residue (contamination) by the protective film adhesive 23 occurs on the surface of the moth-eye film 12, deformation of the convex portion 12 a itself does not occur. The apparent shape of the part has changed.
- the height (similarly, aspect ratio: height / interval or pitch) value and the effective refractive index distribution accompanying the shape change are different. For this reason, the characteristics of the moth-eye film 12 also change, and the deterioration of the antireflection characteristics becomes particularly large.
- the moth-eye film 12 in which the plurality of convex portions 12a having the concave portions 14 shown in FIG. 7 are formed has a flat surface between the convex portions 12a, the adhesive residue of the adhesive 23 is left. Even if contamination occurs, there is little change in the apparent structure.
- the problem of adhesive residue is particularly remarkable in the moth-eye film having the convex portions shown in FIGS. 3 to 6 or forming the concave portions.
- the moth-eye film having a pointed tip of the recess as shown in FIGS. 3 to 6 has a flat surface at the tip of the recess as shown in FIG. 7 from the viewpoint of antireflection characteristics before contamination. Superior to moth-eye film. Therefore, the protective film in the present invention is particularly preferably used for such a moth-eye film.
- FIGS. 8 and 9 are schematic perspective views of the moth-eye film of the first embodiment.
- FIG. 8 shows a case where the convex unit structure is conical
- FIG. 9 shows a case where the convex unit structure is a quadrangular pyramid.
- the top of the convex part 12a is the vertex t
- the point where each convex part 12a contacts is the bottom point b.
- the width w between the vertices of adjacent convex portions 12 a is indicated by the distance between the two points when the perpendiculars are respectively lowered from the vertex t of the convex portions 12 a to the same plane.
- the height h from the vertex of the convex portion 12a to the bottom point is indicated by the distance when the perpendicular is lowered from the vertex t of the convex portion 12a to the plane where the base point b is located.
- the width w between the apexes of adjacent convex portions 12a is 380 nm or less, preferably 300 nm or less, more preferably 200 nm or less.
- a cone and a quadrangular pyramid are exemplified as the unit structure of the convex portion 12a.
- the surface of the moth-eye film according to the first embodiment has apexes and bottoms, and has a wavelength of visible light or less.
- the unit structure is not particularly limited as long as it has a structure in which the interval or pitch of the protrusions is controlled. For example, the inclination becomes gentler toward the apex from the bottom as shown in FIGS.
- Shape (bell-shaped, bell-shaped or dome-shaped), a shape where the slope is partly steep in the region between the bottom point and the vertex as shown in FIG. 12 (sine type), and the bottom point as shown in FIG.
- the shape may be such that the slope becomes steeper as it approaches the apex (needle type), or a shape having a stepped step on the slope of the cone.
- the convex portion may have a plurality of alignment properties, and may not have the alignment properties. That is, the present invention is not limited to the form in which the bottom points, which are the points where the convex portions 12a contact each other, have the same height between the adjacent convex portions. For example, as shown in FIGS. 14 to 16, a plurality of heights of points (contact points) on the surface where the convex portions 12a contact each other may exist. At this time, a hook part exists in these forms. Isobe is a place where the ridgeline of the mountain is depressed (Kojien 5th edition).
- any convex portion having one vertex t is taken as a reference, there are a plurality of contacts at positions lower than the vertex t to form a collar portion.
- any convex portion The lowest contact point around is the base point b, and the point located below the vertex t and above the base point b and serving as the equilibrium point of the buttock is also referred to as the saddle point s.
- the width w between the vertices of the convex portion 12a corresponds to the distance between adjacent vertices
- the height h corresponds to the vertical distance from the vertex to the bottom point.
- FIGS. 17 and 18 are schematic perspective views showing in detail the convex portions of the moth-eye film.
- FIG. 17 is an enlarged view in the case of a bell-shaped type having a hook part and a saddle point
- FIG. 18 is an enlarged view in the case of a needle-like type having a hook part and a saddle point. As shown in FIGS.
- FIG. 19 is a schematic plan view in which convex portions and concave portions of the moth-eye structure are further enlarged.
- a white circle ( ⁇ ) point shown in FIG. 19 represents a vertex
- a black circle ( ⁇ ) point represents a bottom point
- a white square ( ⁇ ) represents a saddle point of the buttock.
- a base point and a saddle point are formed on a concentric circle with one vertex as the center.
- FIG. 19 schematically shows a case in which six base points and six saddle points are formed on one circle, but the present invention is not limited to this and includes irregular ones.
- FIG. 20 is a schematic diagram showing a cross section taken along the line A-A ′ in FIG. 19 and a cross section taken along the line B-B ′ in FIG. 19.
- the vertices are represented by a2, b3, a6, and b5, the ridges are represented by b1, b2, a4, b4, and b6, and the base points are represented by a1, a3, a5, and a7.
- the relationship between a2 and b3 and the relationship between b3 and b5 are the relationship between adjacent vertices, and the distance between a2 and b3 and the distance between b3 and b5 are adjacent. This corresponds to the distance w between matching vertices.
- the height between a2 and a1 or a3, and the height between a6 and a5 or a7 corresponds to the height h of the convex portion.
- FIGS. 21 and 22 are schematic views showing the principle that the moth-eye film of Embodiment 1 realizes low reflection.
- FIG. 21 shows a cross-sectional structure of the moth-eye film
- FIG. 22 shows a change in refractive index (effective refractive index) felt by light incident on the moth-eye film.
- the moth-eye film 12 of Embodiment 1 includes a convex portion 12 a and a base portion 12 b. As light travels from one medium to another, it is refracted, transmitted and reflected at the interface of these media.
- the degree of refraction or the like is determined by the refractive index of the medium through which light travels.
- the refractive index is about 1.0 for air and about 1.5 for resin.
- the unit structure of the concavo-convex structure formed on the surface of the moth-eye film 12 is substantially conical, that is, has a shape in which the width gradually decreases toward the tip. Accordingly, as shown in FIG. 21 and FIG. 22, in the convex portion 12a (between XY) located at the interface between the air layer and the moth-eye film 12, from about 1.0 which is the refractive index of air, the film configuration It can be considered that the refractive index continuously increases gradually up to the refractive index of the material (about 1.5 for resin).
- the width (interval or pitch) between the convex portions adjacent to each other from the viewpoint of optical characteristics, mechanical properties, and manufacturing.
- the form which is 20 nm or more and 200 nm or less and the height of a convex part is 50 nm or more and 400 nm or less is mentioned.
- the plurality of convex portions 12a as a whole are arranged side by side with a repeating unit having a period of less than or equal to the visible light wavelength, but there are portions that do not have periodicity. It does not have to be periodic as a whole.
- variety between the arbitrary one convex parts of several convex parts and the several adjacent convex part may mutually differ.
- the form having no periodicity has a performance advantage that transmission and reflection diffraction scattering due to the regular arrangement hardly occurs, and a manufacturing advantage that a pattern can be easily manufactured.
- a plurality of bottom points having different heights may be formed around one convex portion. Note that the surface of the moth-eye film 12 may have irregularities of micron order or larger, which are larger than nano-ordered irregularities, that is, may have a double uneven structure.
- a method for forming the moth-eye film 12 will be described.
- a glass substrate is prepared, and aluminum (Al) as a material for a mold (mold) is formed on the glass substrate by a sputtering method.
- Al aluminum
- An oxide layer is formed.
- the mold can be manufactured by a flow (anodization 5 times, etching 4 times) in which anodization, etching, anodization, etching, anodization, etching, anodization, etching and anodization are sequentially performed. it can. According to such a repetition process of anodizing and etching, the shape of the minute hole formed becomes a tapered shape (tapered shape) toward the inside of the mold.
- the substrate of the mold is not limited to glass, but a metal material such as SUS, Ni, polypropylene, polymethylpentene, cyclic olefin polymer (typically a product name “ZEONOR” (Neonbornene resin, etc.) And other resin materials such as polyolefin resin, polycarbonate resin, polyethylene terephthalate, polyethylene naphthalate, and triacetyl cellulose. Further, an aluminum bulk substrate may be used instead of the substrate on which aluminum is formed.
- the shape of the mold may be a flat plate shape or a roll (cylindrical) shape.
- a 10 cm square glass substrate was prepared, and an aluminum (Al) film serving as a mold material was formed on the glass substrate to a thickness of 1.0 ⁇ m by sputtering.
- the film thickness of aluminum (Al) used as the material of the mold was 1.0 ⁇ m.
- the anodizing conditions were 0.6 wt% oxalic acid, a liquid temperature of 5 ° C., and an applied voltage of 80V. By adjusting the anodizing time, a difference is made in the size (depth) of the formed hole. The relationship between the anodizing time and the hole size (depth) is shown in Table 1 below.
- the etching conditions in each example were phosphoric acid 1 mol / l, liquid temperature 30 ° C., and 25 minutes, respectively.
- a 2P (photopolymerizable) resin solution having translucency is dropped on the surface of the mold produced by such a manufacturing process, and the 2P resin solution is used with care so that bubbles do not enter.
- a substrate for example, a TAC film
- the 2P resin layer was cured by irradiating the 2P resin layer with ultraviolet (UV) light at 2 J / cm 2 , and then the cured 2P resin film and the laminated film of the TAC film were peeled off.
- UV ultraviolet
- a specific method for forming (replicating) fine irregularities on a substrate using a mold in addition to the 2P method (Photo-polymerization method), for example, a hot press method (embossing method), an injection molding method, or the like
- Various methods such as a replication method such as a sol-gel method, a method for laminating a fine uneven shape sheet, and a method for transferring a fine uneven layer may be appropriately selected depending on the use of the antireflective article, the material of the base material, and the like. .
- the surfaces of the moth-eye films produced by the 2P method were all hydrophilic, and the contact angle with water was 15 ° or less.
- super-water repellency can be obtained (lotus effect) if the surface is formed from a hydrophobic (water-repellent) material due to the effect of increasing the surface area, and the surface is hydrophilic. It is known that super hydrophilicity can be obtained if it is made of a material. Therefore, by appropriately selecting the material for forming the concavo-convex structure and the concavo-convex shape, it is possible to produce a moth-eye antireflection body that exhibits various surface states from hydrophilic to hydrophobic (water repellency).
- the protection film of the present invention is suitable for the moth-eye reflection preventing body exhibiting hydrophilicity.
- the present invention is also applicable to a moth-eye antireflection body that exhibits hydrophobicity (water repellency).
- the depth of the concave portion of the mold and the height of the convex portion of the moth-eye film can be measured using an SEM (Scanning Electron Microscope).
- the contact angle with respect to the water of the surface of a moth-eye reflection preventing body can be measured using a contact angle meter.
- the active energy ray-curable resin composition represented by the above-mentioned photocurable resin composition, electron beam curable resin composition, and the like, and And a thermosetting resin composition.
- the monomer and / or oligomer that can be polymerized by active energy rays whether organic or inorganic, in the presence or absence of a photopolymerization initiator, active energy such as ultraviolet rays, visible energy rays, and infrared rays.
- active energy such as ultraviolet rays, visible energy rays, and infrared rays.
- Any polymer may be used as long as it is polymerized by irradiation with a line and becomes a polymer, and may be any of radical polymerizability, anion polymerizability, cation polymerizability, and the like.
- a vinyl group, a vinylidene group, an acryloyl group, and a methacryloyl group (hereinafter, the acryloyl group and the methacryloyl group are also referred to as a (meth) acryloyl group).
- the monomer having a (meth) acryloyl group and / or the polymerization rate due to irradiation with active energy rays is high. Oligomers are preferred.
- the active energy ray-curable resin composition may contain a non-reactive polymer, an active energy ray sol-gel reactive composition, and the like.
- a method for making the surface of the molded product hydrophilic physical surface treatment such as corona treatment, plasma treatment, ultraviolet treatment, chemical surface treatment such as sulfonation, kneading method of surfactant or hydrophilic substance
- molding Examples of the material include use of a polymer having a hydrophilic group and coating with a hydrophilic polymer.
- the graft polymerization method of the hydrophilic monomer to the polymer molding surface is also mentioned.
- an active energy ray-curable composition capable of forming a hydrophilic film an ultraviolet curable composition comprising a polyalkylene glycol (meth) acrylate and a reactive surfactant having an alkylene oxide bond in the molecule.
- An ultraviolet curable composition comprising a polyfunctional acrylate having two or more hydroxyl groups in the molecule and a reactive surfactant having an alkylene oxide bond in the molecule, a polyethylene glycol chain having a repeating number of 6 to 20
- energy ray-curable compositions comprising an amphiphilic polymerizable compound, polyurethane (meth) acrylate, a photocurable composition comprising a diacrylate having a ring structure and a polyalkylene glycol acrylate, etc.
- Examples of monomers that can be polymerized by active energy rays include ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, hexyl (meth) acrylate, and 2-ethylhexyl.
- the oligomer that can be polymerized by active energy rays is an oligomer having a polymerizable functional group that can be polymerized by active energy rays, and preferably has a molecular weight of 500 to 50,000.
- oligomers include, for example, (meth) acrylic esters of epoxy resins such as bisphenol A-diepoxy- (meth) acrylic acid adducts, (meth) acrylic esters of polyether resins, and (meth) polybutadiene resins.
- Acrylic acid esters, polyurethane resins having a (meth) acrylic group at the molecular end, and the like can be mentioned.
- Monomers and / or oligomers that can be polymerized by these active energy rays can be used singly or by mixing two or more materials, for example, by mixing monomers or oligomers, Monomers and oligomers can be mixed and used.
- the moth-eye structure of the surface hydrophilic molded product that is, a cured product of a shaped product comprising monomers and / or oligomers that can be polymerized by active energy rays.
- the crosslinking density can be arbitrarily controlled.
- a moth-eye structure having a hydrophobic (water-repellent) surface can be formed.
- the photopolymerization initiator is active with respect to the active energy ray used in the present invention, and is capable of polymerizing the monomer and / or oligomer and the hydrophilic monomer and / or hydrophilic oligomer.
- a radical polymerization initiator, an anionic polymerization initiator, a cationic polymerization initiator, or the like can be used.
- photopolymerization initiators include acetophenones such as p-tert-butyltrichloroacetophenone, 2,2′-diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one; Ketones such as benzophenone, 4,4′-bisdimethylaminobenzophenone, 2-chlorothioxanthone, 2-methylthioxanthone, 2-ethylthioxanthone, 2-isopropylthioxanthone; benzoin, benzoin methyl ether, benzoin isopropyl ether, benzoin isobutyl ether, etc. Benzoin ethers; benzyl ketals such as benzyl dimethyl ketal and hydroxycyclohexyl phenyl ketone.
- the hydrophilic monomer and / or hydrophilic oligomer is a monomer and / or oligomer having a hydrophilic group in the molecule, and examples of the hydrophilic group include a polyethylene glycol group, a polyoxymethylene group, a hydroxyl group, a sugar-containing group, and an amide group.
- Nonionic hydrophilic groups such as pyrrolidone groups; Anionic hydrophilic groups such as carboxyl groups, sulfone groups and phosphate groups; Cationic hydrophilic groups such as amino groups and ammonium groups; Amino acid-containing groups and phosphate groups / ammonium ion groups Zwitterionic groups of Further, these derivatives may be used, and examples thereof include N-substituted products such as amino group, amide group, ammonium group, and pyrrolidone group.
- the hydrophilic monomer and / or hydrophilic oligomer may have one or a plurality of hydrophilic groups in the molecule, or may have a plurality of types of hydrophilic groups.
- hydrophilic monomer and / or hydrophilic oligomer examples include monomers having a hydroxyl group such as 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and glycerol mono (meth) acrylate; Diethylene glycol mono (meth) acrylate, triethylene glycol mono (meth) acrylate, tetraethylene glycol mono (meth) acrylate, nonaethylene glycol mono (meth) acrylate, tetradecaethylene glycol mono (meth) acrylate, trieicosaethylene glycol mono (Meth) acrylate, polyethylene glycol mono (meth) acrylate, methoxydiethylene glycol (meth) acrylate, methoxytriethylene glycol (meth) acrylate, methoxytetraethylene glycol (meth) acrylate, methoxynonaethylene glycol (meth) acrylate, methoxytetradeca Ethylene glycol (
- a monomer having an amino group Monomers having a carboxyl group such as 2- (meth) acryloyloxyethylphthalic acid, 2- (meth) acryloyloxypropylphthalic acid, 2- (meth) acryloyloxyethyl succinic acid; A monomer having a phosphate group, such as mono (2-methacryloyloxyethyl) acid phosphate, mono (2-acryloyloxyethyl) acid phosphate; Monomers having a quaternary ammonium base such as (meth) acryloyloxyethyltrimethylammonium chloride, (meth) acryloyloxypropyltrimethylammonium chloride; 2-acrylamido-2-methylpropanesulfonic acid, 2-acrylamido-2-phenylpropanesulfonic acid, sodium (meth) acryloyloxyethyl sulfonate, ammonium (meth) acryloyloxye
- numerator can also be used as a hydrophilic monomer and / or a hydrophilic oligomer.
- a (meth) acryl monomer and / or oligomer having a sugar skeleton in the molecule can also be used as the hydrophilic monomer and / or hydrophilic oligomer.
- FIG. 23 is a schematic cross-sectional view of the protective film of Embodiment 1.
- the protective film 13 of Embodiment 1 has a support film 21 and an adhesive layer 22.
- the kind and material of the support film 21 are not specifically limited, For example, resin, such as PET (polyethylene terephthalate), is mentioned.
- the pressure-sensitive adhesive layer 22 in Embodiment 1 will be described in detail below.
- the pressure-sensitive adhesive layer 22 is obtained by subjecting a pressure-sensitive adhesive composition containing a (meth) acrylic acid ester copolymer (A) and a crosslinking agent (B) to a crosslinking reaction.
- the (meth) acrylic acid ester copolymer (A) has, as a monomer unit, at least a (meth) acrylic acid alkyl ester monomer (a) having an acyclic alkyl group having 4 to 9 carbon atoms, an aliphatic ring It has a chemical structure derived from a (meth) acrylic acid ester monomer (b) having a monomer and a monomer (c) having a functional group reactive with the crosslinking agent (B).
- (meth) acrylic acid alkyl ester means both acrylic acid alkyl ester and methacrylic acid alkyl ester. Other similar terms are understood similarly.
- the above-mentioned copolymer (A) contains a monomer unit derived from the (meth) acrylic acid alkyl ester monomer (a) having a non-cyclic alkyl group having 4 to 9 carbon atoms, thereby providing a pressure-sensitive adhesive. Appropriate adhesive strength can be imparted to the layer.
- Preferable examples of the (meth) acrylic acid alkyl ester monomer (a) include butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, and isooctyl (meth) acrylate. Etc. From the viewpoint of imparting appropriate adhesive strength, butyl (meth) acrylate or 2-ethylhexyl (meth) acrylate is particularly preferable.
- butyl acrylate as a main monomer (a monomer occupying the largest mass ratio), the molecular weight distribution can be narrowed, and the proportion of components having a molecular weight of 100,000 or less can be reduced.
- the said monomer (a) may be used together 2 or more types.
- the glass transition temperature of the copolymer (A) is increased. While raising moderately and giving the adhesive layer obtained appropriate intensity
- the (meth) acrylic acid ester monomer (b) include cyclopentyl (meth) acrylate, cyclohexyl (meth) acrylate, cycloheptyl (meth) acrylate, isobornyl (meth) acrylate and the like. Of these, cyclohexyl (meth) acrylate is particularly preferable.
- the said monomer (b) may be used together 2 or more types.
- the entire monomer component for forming the copolymer (A) is used.
- the copolymer (A) contains a monomer (c) having a functional group that is reactive with the crosslinking agent (B) as a monomer unit
- the copolymer (A) is introduced via the crosslinking agent (B).
- a copolymer (A) can be bridge
- Preferable examples of the monomer (c) include a carboxyl group-containing monomer, a hydroxyl group-containing monomer, and an amino group-containing monomer.
- carboxyl group-containing monomer examples include ethylenically unsaturated carboxylic acids such as (meth) acrylic acid, crotonic acid, maleic acid, itaconic acid and citraconic acid.
- Preferred examples of the hydroxyl group-containing monomer include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, 2-hydroxybutyl (meth) acrylate, 3-hydroxy And hydroxyalkyl (meth) acrylates such as butyl (meth) acrylate and 4-hydroxybutyl (meth) acrylate.
- amino group-containing monomer examples include monoalkylamino such as monomethylaminoethyl (meth) acrylate, monoethylaminoethyl (meth) acrylate, monomethylaminopropyl (meth) acrylate, and monoethylaminopropyl (meth) acrylate.
- monoalkylamino such as monomethylaminoethyl (meth) acrylate, monoethylaminoethyl (meth) acrylate, monomethylaminopropyl (meth) acrylate, and monoethylaminopropyl (meth) acrylate.
- alkyl (meth) acrylate examples include alkyl (meth) acrylate.
- the said monomer (c) may be used together 2 or more types.
- the blending ratio of the monomer (c) is for forming the copolymer (A) from the viewpoint of the balance between the releasability and adhesive strength of the obtained adhesive layer and the control of polymerization (molecular weight distribution). It is preferable to blend 0.5 to 5% by mass with respect to the whole monomer component. More preferably, it is 1 to 4% by mass, and still more preferably 2 to 3% by mass.
- the copolymer (A) may have monomer units other than the chemical structures derived from the above (a) to (c).
- examples of other components that may be included in the monomer component include aromatic ring-containing (meth) acrylates such as phenyl (meth) acrylate and naphthyl (meth) acrylate; vinyl esters such as vinyl acetate and vinyl propionate; Olefins such as ethylene, propylene and isobutylene; Halogenated olefins such as vinyl chloride and vinylidene chloride; Styrene monomers such as styrene and ⁇ -methylstyrene; Diene monomers such as butadiene, isoprene and chloroprene; Acrylonitrile And nitrile monomers such as methacrylonitrile; acrylamides such as acrylamide, N-methylacrylamide, and N, N-dimethylacrylamide.
- the constituent ratio of these components in the entire monomer component can
- the weight average molecular weight (Mw) of the (meth) acrylic acid ester copolymer (A) is required to be 600,000 or more and less than 1.5 million.
- the weight average molecular weight is less than 600,000, the cohesive force of the adhesive layer becomes insufficient, and when the laminate is peeled off after a certain period of time in various environments, the adhesive to the uneven layer of the antireflection film is removed. The rest occurs.
- the weight average molecular weight is 1,500,000 or more, polymerization control becomes insufficient, the molecular weight distribution becomes large, and the proportion of components having a molecular weight of 100,000 or less may increase.
- the weight average molecular weight is preferably 800,000 to 1,400,000, and more preferably 1,000,000 to 1,300,000.
- the molecular weight distribution (Mw / Mn) of the copolymer (A) is preferably 1.2 to 3.0. When it is going to obtain a thing less than 1.2, the production efficiency of the said copolymer (A) may fall remarkably. On the other hand, when 3.0 is exceeded, in the said laminated body, the low molecular weight component of the said copolymer (A) may bleed out from the adhesion layer of a protective film to the uneven
- the weight average molecular weight and the molecular weight distribution can be determined by a GPC (gel permeation chromatography) method. Details will be described later.
- the said copolymer (A) requires that the area ratio which the component of molecular weight obtained by GPC measurement occupies is less than 3.0% of the whole.
- the ratio can be calculated from a GPC curve.
- the proportion is less than 3.0%, the amount of the low molecular weight component of the copolymer (A) in the adhesive layer is small, so that the migration of the antireflection film to the uneven layer side can be effectively reduced.
- the ratio is preferably 2.5% or less, and more preferably 2.2% or less.
- 0% may be sufficient.
- the ratio is preferably 1.0% or more.
- the method for obtaining the (meth) acrylic acid ester copolymer (A) is not particularly limited.
- a method obtained by purifying a polymer obtained by a normal free radical polymerization method can be mentioned.
- the components (a) to (c) are mixed according to the blending ratio. It can be expected to be introduced into the copolymer. Thereby, the dispersion
- the living radical polymerization method a conventionally known method, for example, an atom transfer radical polymerization method using an atom transfer radical polymerization agent as a polymerization controller (ATRP polymerization method), a reversible addition-cleavage chain using a reversible addition-cleavage chain transfer agent.
- a polymerization method by transfer RAFT polymerization method
- RAFT polymerization method a polymerization method using an organic tellurium compound as a polymerization initiator
- a method using an organic tellurium compound as a polymerization initiator is preferable because of controllability of molecular weight and polymerization in an aqueous system. Below, the method of using an organic tellurium compound as a polymerization initiator is shown.
- the (meth) acrylic ester copolymer (A) is, for example, the following general formula (1); (Wherein R 1 represents an alkyl group having 1 to 8 carbon atoms, an aryl group, a substituted aryl group or an aromatic heterocyclic group. R 2 and R 3 are the same or different and each represents a hydrogen atom or 1 carbon atom. R 4 represents an aryl group, a substituted aryl group, an aromatic heterocyclic group, an acyl group, an oxycarbonyl group, or a cyano group). It can also be produced by polymerizing a mixture of monomers using organic tellurium compound I.).
- alkyl group having 1 to 8 carbon atoms examples include methyl group, ethyl group, n-propyl group, isopropyl group, cyclopropyl group, n-butyl group, sec-butyl group, tert-butyl group, cyclobutyl group, n- Examples thereof include linear, branched or cyclic alkyl groups having 1 to 8 carbon atoms such as a pentyl group, n-hexyl group, n-heptyl group and n-octyl group.
- Preferable alkyl groups include linear or branched alkyl groups having 1 to 4 carbon atoms, and more preferably a methyl group or an ethyl group.
- Examples of the aryl group include a phenyl group and a naphthyl group.
- the phenyl group which has a substituent, the naphthyl group which has a substituent, etc. are mentioned.
- Examples of the aromatic heterocyclic group include a pyridyl group, a furyl group, and a thienyl group.
- substituent of the substituted aryl group examples include a halogen atom, a hydroxyl group, an alkoxy group, an amino group, a nitro group, a cyano group, a carbonyl-containing group represented by —COR 5 (R 5 : an alkyl group having 1 to 8 carbon atoms, an aryl group) Group, alkoxy group or aryloxy group), sulfonyl group, trifluoromethyl group and the like.
- Preferred aryl groups include phenyl groups and trifluoromethyl substituted phenyl groups.
- the said substituent is 1 or 2 substituted, and as a substitution place, para position or ortho position is preferable.
- Examples of the alkyl group having 1 to 8 carbon atoms include those similar to the alkyl group represented by R 1 .
- Examples of the aryl group, the substituted aryl group, and the aromatic heterocyclic group include the same groups as those described above for R 1 .
- Examples of the acyl group include formyl group, acetyl group, and benzoyl group.
- the oxycarbonyl group is preferably a group represented by —COOR 6 (R 6 : a hydrogen atom, an alkyl group having 1 to 8 carbon atoms or an aryl group), and examples thereof include a carboxyl group, a methoxycarbonyl group, an ethoxycarbonyl group, and a propoxy group.
- Examples thereof include a carbonyl group, an n-butoxycarbonyl group, a sec-butoxycarbonyl group, a tert-butoxycarbonyl group, an n-pentoxycarbonyl group, and a phenoxycarbonyl group.
- Preferred oxycarbonyl groups include methoxycarbonyl group and ethoxycarbonyl group.
- Preferable examples of the group represented by R 4 include an aryl group, a substituted aryl group, and an oxycarbonyl group.
- the aryl group is preferably a phenyl group.
- a substituted aryl group a halogen atom substituted phenyl group or a trifluoromethyl substituted phenyl group is preferable.
- the above substituent is preferably one having 1 to 5 substituents.
- the above substituent is preferably one or two substituted.
- the substitution position in the case of single substitution is preferably the para position or the ortho position, and the substitution position in the case of two substitutions is preferably the meta position.
- the oxycarbonyl group is preferably a methoxycarbonyl group or an ethoxycarbonyl group.
- R 1 represents an alkyl group having 1 to 4 carbon atoms
- R 2 and R 3 may be the same or different, and may be a hydrogen atom or a carbon atom having 1 to 4 carbon atoms.
- 4 is preferred, wherein R 4 is an aryl group, a substituted aryl group or an oxycarbonyl group.
- R 1 represents an alkyl group having 1 to 4 carbon atoms
- R 2 and R 3 are the same or different and represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms
- R 4 represents phenyl Group, a substituted phenyl group, a methoxycarbonyl group or an ethoxycarbonyl group.
- organic tellurium compound represented by the general formula (1) are as follows.
- organic tellurium compounds examples include (methylterranyl-methyl) benzene, (1-methylterranyl-ethyl) benzene, (2-methylterranyl-propyl) benzene, 1-chloro-4- (methylterranyl-methyl) benzene, 1-hydroxy-4 -(Methylterranyl-methyl) benzene, 1-methoxy-4- (methylterranyl-methyl) benzene, 1-amino-4- (methylterranyl-methyl) benzene, 1-nitro-4- (methylterranyl-methyl) benzene, 1-cyano -4- (methyl teranyl-methyl) benzene, 1-methylcarbonyl-4- (methyl terranyl-methyl) benzene, 1-phenylcarbonyl-4- (methyl terranyl-methyl) benzene, 1-methoxycarbonyl-4- (methyl terranyl-methyl) Benzene, 1-pheno Cycarbonyl
- the methyl teranyl, the 1-methyl terranyl, and the 2-methyl teranyl moieties may be substituted with ethyl terranyl, 1-ethyl terranyl, 2-ethyl terranyl, butyl terranyl, 1-butyl terranyl, or 2-butyl teranyl, respectively.
- organic tellurium compounds (methylterranyl-methyl) benzene, (1-methylterranyl-ethyl) benzene, (2-methylterranyl-propyl) benzene, 1-chloro-4- (1-methylterranyl-ethyl) are preferable.
- organic tellurium compounds represented by the general formula (1) may be used singly or in combination of two or more.
- an azo polymerization initiator may be added as a polymerization accelerator in addition to the organic tellurium compound.
- the azo polymerization initiator is not particularly limited as long as it is an initiator used for ordinary radical polymerization.
- 2,2′-azobis isobutyronitrile
- AIBN 2,2′-azobis ( 2-methylbutyronitrile)
- AMBN 2,2′-azobis (2,4-dimethylvaleronitrile)
- ADVN 1,1′-azobis (1-cyclohexanecarbonitrile)
- MAIB dimethyl-2 2,2′-azobisisobutyrate
- ACVA 4,4′-azobis (4-cyanovaleric acid)
- 1,1′-azobis (1-acetoxy-1-phenylethane 2,2 '-Azobis (2-methylbutyramide
- 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile 2,2'-azobis (2-methylamido) Nopropane) dihydrochloride
- the azo polymerization initiator When used, it is preferably 0.01 to 100 mol, more preferably 0.1 to 100 mol, relative to 1 mol of the organic tellurium compound represented by the general formula (1) as the polymerization initiator. More preferably, it is used at a ratio of 0.1 to 5 mol.
- an inert gas examples include nitrogen, argon, and helium. Argon or nitrogen is preferable, and nitrogen is more preferable.
- (meth) acrylic acid ester copolymer (A) (henceforth a living radical copolymer ( It may be appropriately adjusted according to the molecular weight or molecular weight distribution of A).
- a value obtained by dividing the sum of values obtained by multiplying the molecular weight of each monomer by the charge ratio (the amount used) is the weight average molecular weight (Mw) of the target copolymer (A).
- Mw weight average molecular weight
- the unit is the number of moles), and in some cases, 0.3 to 3 times the value is used.
- the polymerization step in the present embodiment may be performed without a solvent, but an organic solvent generally used in radical polymerization may be used.
- the solvent that can be used include benzene, toluene, N, N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), acetone, chloroform, carbon tetrachloride, tetrahydrofuran (THF), ethyl acetate, trifluoromethylbenzene, and the like.
- DMF N, N-dimethylformamide
- DMSO dimethyl sulfoxide
- THF tetrahydrofuran
- ethyl acetate trifluoromethylbenzene
- An aqueous solvent can also be used, and examples thereof include water, methanol, ethanol, isopropanol, n-butanol, ethyl cellosolve, butyl cellosolve, 1-methoxy-2-propanol and the like.
- the amount of the solvent used may be appropriately adjusted.
- the amount of the solvent is preferably 0.01 to 100 ml, more preferably 0.05 to 10 ml, still more preferably 0 with respect to 1 g of the monomer. .05-0.5 ml.
- the reaction temperature and reaction time may be appropriately adjusted according to the molecular weight or molecular weight distribution of the resulting living radical copolymer (A).
- the reaction is performed at 60 to 150 ° C. for 5 to 100 hours.
- stirring is performed at 80 to 120 ° C. for 10 to 30 hours.
- the pressure may be normal pressure, but may be increased or decreased.
- the intended living radical copolymer (A) is purified as necessary by removing the solvent used and residual monomers under reduced pressure, precipitation filtration, reprecipitation, column separation and the like by a conventional method.
- the reaction treatment can be performed by any treatment method as long as there is no problem with the object.
- the living radical polymerization method by using a mixture containing each monomer for constituting the (meth) acrylic acid ester copolymer (A), the (meth) acrylic acid ester copolymer of the random copolymer is used. A polymer (A) can be obtained. According to the living radical polymerization method, the random copolymer can obtain a copolymer having a constituent ratio according to the ratio of the monomer to be reacted, regardless of the kind of the monomer.
- the living radical polymerization initiator represented by the general formula (1) used in the present embodiment can perform excellent molecular weight control and molecular weight distribution control under mild conditions.
- the weight average molecular weight of the (meth) acrylic acid ester copolymer (A) comprising the living radical copolymer obtained in this embodiment is the reaction time, the living radical polymerization initiator (organic) represented by the general formula (1)
- the amount of tellurium compound can be adjusted. Specifically, in order to increase the molecular weight, the blending ratio of the organic tellurium compound with respect to the monomer may be reduced and the polymerization time may be increased, but in this case, the copolymer (A) having a large weight average molecular weight. It takes a long time to get Therefore, in order to reduce the polymerization time, measures such as increasing the polymerization temperature and adding the azo polymerization initiator are required. However, it should be noted that if the polymerization temperature is too high, or if the amount of the azo polymerization initiator added is too large, the molecular weight distribution of the copolymer (A) will be increased. Should.
- crosslinking agent (B) that is one of the essential components of the pressure-sensitive adhesive composition
- the crosslinking agent (B) include isocyanate crosslinking agents, epoxy crosslinking agents, aziridine crosslinking agents, metal chelate crosslinking agents and the like.
- the monomer (c) is a hydroxyl group-containing monomer
- the monomer (c) is a carboxyl group-containing monomer or an amino group-containing monomer
- the isocyanate-based crosslinking agent contains at least a polyisocyanate compound.
- the polyisocyanate compound include aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate and xylylene diisocyanate, aliphatic polyisocyanates such as hexamethylene diisocyanate, alicyclic polyisocyanates such as isophorone diisocyanate and hydrogenated diphenylmethane diisocyanate, Examples thereof include biuret bodies, isocyanurate bodies, or adduct bodies that are a reaction product with a low-molecular active hydrogen-containing compound such as ethylene glycol, propylene glycol, neopentyl glycol, trimethylolpropane, and castor oil.
- an isocyanurate of an aliphatic polyisocyanate such as a trimer of hexamethylene diisocyanate
- epoxy-based crosslinking agent examples include 1,3-bis (N, N′-diglycidylaminomethyl) cyclohexane, N, N, N ′, N′-tetraglycidyl-m-xylylenediamine, ethylene glycol diglycidyl.
- examples include ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane diglycidyl ether, diglycidyl aniline, diglycidyl amine and the like.
- aziridine-based crosslinking agent examples include diphenylmethane-4,4′-bis (1-aziridinecarboxamide), trimethylolpropane tri- ⁇ -aziridinyl propionate, tetramethylolmethane tri- ⁇ -aziridinyl.
- Examples of the metal chelate-based crosslinking agent include chelate compounds whose metal atoms are aluminum, zirconium, titanium, zinc, iron, tin and the like, and aluminum chelate compounds are preferable from the viewpoint of performance.
- Examples of the aluminum chelate compound include diisopropoxy aluminum monooleyl acetoacetate, monoisopropoxy aluminum bis oleyl acetoacetate, monoisopropoxy aluminum monooleate monoethyl acetoacetate, diisopropoxy aluminum monolauryl acetoacetate, diisopropoxy Examples thereof include aluminum monostearyl acetoacetate and diisopropoxy aluminum monoisostearyl acetoacetate.
- an isocyanate-based crosslinking agent as the crosslinking agent (B) from the viewpoint of easy handling and the ability to form a crosslinked structure having appropriate strength and flexibility.
- an isocyanate type crosslinking agent it is preferable to use a hydroxyl-containing monomer as a monomer (c) which comprises the said copolymer (A).
- a chelating agent such as acetylacetone and an organic tin catalyst such as dibutyltin dilaurate in order to prolong the pot life (delay gelation).
- the chelating agent is preferably used in an amount of 100 to 500 parts by mass with respect to 1 part by mass of the organotin catalyst.
- the addition amount of the organic tin catalyst is preferably 0.01 to 0.1 parts by mass with respect to 100 parts by mass of the copolymer (A).
- a crosslinking agent may be used individually by 1 type, and may use 2 or more types together.
- the amount of the crosslinking agent (B) is preferably 0.01 to 15 parts by mass with respect to 100 parts by mass of the copolymer (A).
- the amount is less than 0.01 parts by mass, the removability may be insufficient.
- the amount exceeds 15 parts by mass, the adhesive strength may be insufficient.
- the amount is preferably 0.1 to 10 parts by mass, more preferably 1 to 5 parts by mass.
- the support film 21 is not particularly limited, and examples thereof include polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyethylene films, polypropylene films, cellophane, diacetyl cellulose films, triacetyl cellulose films, and acetyl cellulose butyrate films.
- polyester films such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate, polyethylene films, polypropylene films, cellophane, diacetyl cellulose films, triacetyl cellulose films, and acetyl cellulose butyrate films.
- the support film 21 is required to be viewed from above. Is preferably transparent.
- the thickness of the support film 21 is not particularly limited and is appropriately selected, but is preferably 10 to 250 ⁇ m, more preferably 30 to 200 ⁇ m. Further, the support film 21 may be subjected to a surface treatment on one side or both sides by an oxidation method, a concavo-convex method, or the like as desired for the purpose of improving the adhesion with a layer provided on the surface.
- the oxidation method include corona discharge treatment, plasma treatment, chromic acid treatment (wet), flame treatment, hot air treatment, ozone / ultraviolet irradiation treatment, and the like.
- corrugated method, the sandblasting method, the solvent processing method, etc. are mentioned, for example.
- These surface treatment methods are appropriately selected according to the type of the support film, but a corona discharge treatment method is preferably used from the viewpoints of effects and operability. Moreover, you may use what gave the primer process to the single side
- the pressure-sensitive adhesive composition is prepared by sequentially adding the above various components with stirring.
- an adhesive composition can be diluted using a dilution solvent as needed. This makes it easy to make the pressure-sensitive adhesive composition uniform and adjust the viscosity necessary for coating.
- the diluent solvent include aliphatic hydrocarbons such as hexane and heptane; aliphatic cyclic compounds such as cyclohexane and cycloheptane; aromatic hydrocarbons such as toluene and xylene; methylene chloride and ethylene chloride Halogenated hydrocarbons such as methanol, ethanol, propanol, butanol, etc .; acetone, methyl ethyl ketone, 2-pentanone, isophorone, cyclohexanone, etc. ketones; ethyl acetate, butyl acetate, etc. esters; ethyl cellosolve, etc. Cellosolve solvents; glycol ether solvents such as propylene glycol monomethyl ether.
- the amount of the diluting solvent used is not particularly limited, but when diluting solvent is used, it is preferable to dilute the pressure-sensitive adhesive composition so that the concentration thereof is 10 to 60% by mass.
- the obtained pressure-sensitive adhesive composition or a diluted solution thereof is applied onto the support film 21, dried as necessary, and crosslinked to form the pressure-sensitive adhesive layer 22.
- a known thickness such as a knife coating method, a roll coating method, a bar coating method, a blade coating method, a die coating method, a gravure coating method, or the like is used.
- coating on a base material so that it may become, and drying can be used.
- the thickness of the adhesive layer 22 is preferably 2 to 30 ⁇ m, and more preferably 5 to 15 ⁇ m.
- the drying is preferably performed at 60 to 120 ° C. for about 10 seconds to 10 minutes in order to evaporate the used dilution solvent and advance the crosslinking reaction.
- the adhesive layer 22 of the protective film 13 thus obtained is preferably subjected to an aging treatment by protecting the exposed adhesive layer surface with a release film, if necessary.
- the aging treatment is preferably left at 20 to 60 ° C. for 1 to 2 weeks.
- the release film can be obtained by applying a known silicone-based, olefin-based, fluorine-based, or alkyd-based release agent on the various films exemplified by the support film 21.
- the antireflection film 12 having the convex portion 12a in which the width between adjacent vertices is not more than the visible light wavelength is manufactured.
- the protective film 13 obtained by the above process is removed when the release film is laminated on the adhesive layer 22, and is removed as it is when the release film is not laminated.
- the layers 22 and the antireflection film 12 are attached to each other so that the convex portions are in contact with each other.
- the laminated body 10 which consists of the protective film 13 and the antireflection film 12 can be obtained by making it crimp using a commercially available laminator.
- the method for the above-mentioned pressure bonding is not particularly limited, but for example, it can be carried out by applying pressure of 0.01 to 1 MPa at 0.1 to 10 m / min.
- the protective film 13 has an adhesive strength between the moth-eye film (antireflection film) 12 and the protective film 13 at a peeling speed of 0.3 m / min or 10 m / min.
- the adhesive strength (mN / 25 mm) was measured according to JIS Z0237: 2009, except that the side of was peeled off in the direction of 180 °. The results are shown in Table 2 below.
- the adhesive strength at a peeling speed of 0.3 m / min is preferably 40 to 150 mN / 25 mm.
- the adhesive strength at 10 m / min is preferably 40 to 1000 mN / 25 mm.
- FIG. 24 is a photograph of samples having different reflectances used as evaluation criteria for sticking marks. The results are shown in Table 2 below.
- Table 2 ⁇ does not feel any increase in the amount of reflected light, and no mark remains, ⁇ indicates that there is almost no increase in the amount of reflected light, almost no mark remains, and ⁇ indicates a slight amount of reflected light. An increase is felt and the mark remains, so it cannot be said that it is good, and x indicates an increase in the amount of reflected light, and the mark remains, indicating that it is treated as a defective product.
- the durability conditions were the following three conditions. 1) 23 ° C, relative humidity (RH) 50% 2) 80 ° C, dry conditions 3) 60 ° C, relative humidity (RH) 95%
- Example 1 Production of (meth) acrylic acid ester copolymer (A) comprising random copolymer by living radical polymerization 6.38 g (50 mmol) of metal tellurium (Aldrich, product name: Tellurium ( ⁇ 40 mesh)) The suspension was suspended in 50 ml of tetrahydrofuran (THF), and 34.4 ml (55 mmol) of n-butyllithium (manufactured by Aldrich, 1.6 mol / L hexane solution) was slowly added dropwise at room temperature. The reaction solution after the dropwise addition was stirred until the metal tellurium disappeared completely.
- THF tetrahydrofuran
- BA butyl acrylate
- CHA cyclohexyl acrylate
- 4HBA 4-hydroxybutyl acrylate
- A acrylic acid ester copolymer
- ⁇ Living radical polymerization> In a glove box substituted with argon, 68.5 ⁇ L of ethyl-2-methyl-2-n-butylterranyl-propionate prepared by the above method, 110 g of butyl acrylate (same as above), 28.5 g of cyclohexyl acrylate (same as above), 4-hydroxybutyl 4.3 g of acrylate (same as above) and 4.6 mg of 2,2′-azobis (isobutyronitrile) (AIBN) (Aldrich) were reacted at 60 ° C. for 20 hours.
- AIBN 2,2′-azobis (isobutyronitrile)
- the reactor was taken out of the glove box, dissolved in 500 ml of ethyl acetate, and the solution of the (meth) acrylic acid ester copolymer was passed through a column made of activated alumina (manufactured by Wako Pure Chemical Industries, Ltd.). . Thereafter, the solution of the (meth) acrylic acid ester copolymer (A) was adjusted to a solid content of 16% by mass by adding toluene.
- the weight average molecular weight Mw was 1,000,000, and molecular weight distribution (Mw / Mn) was 2.06. From the GPC chart, the area ratio of the component having a molecular weight of 100,000 or less in the whole was 1.95%.
- the release surface side of a release film (trade name “SP-PET 381031”, manufactured by Lintec Corporation) having a thickness of 38 ⁇ m was bonded to the exposed surface side of the pressure-sensitive adhesive layer 22 obtained above as a release film.
- the protective film 13 was obtained by performing the aging process left still for one week on the conditions of 23 degreeC and 50% of relative humidity.
- a moth-eye film (antireflection film) 12 made of an acrylic resin and having a convex-to-convex distance of 150 to 200 nm and a convex portion aspect ratio of about 1.1 was prepared.
- a glass substrate is prepared, aluminum (Al) as a mold (mold) material is formed on the glass substrate by a sputtering method, and moth-eye molding is performed using the conditions of the mold 3 described in Table 1 above.
- a mold was prepared.
- a 2P (photopolymerizable) resin solution having translucency is dropped on the mold, and the mold and the TAC film are bonded via the 2P resin using a roller while being careful not to enter bubbles. Combined.
- the 2P resin layer is cured by irradiating 2 J / cm 2 with ultraviolet light from the TAC film side, the laminated film of the cured 2P resin and the TAC film is released from the mold, and a moth-eye film (antireflection film) is formed.
- a moth-eye film antireflection film
- the prepared moth-eye film was bonded to a black acrylic plate using an optical adhesive and the reflectance was measured. The reflectance at 5 ° incidence was 0.1% or less, and it had excellent antireflection performance. It became clear that.
- the release film was removed from the protective film 13 for which the aging treatment was completed in the above step. Thereafter, the protective film 13 was overlaid on the moth-eye film so that the exposed adhesive layer 22 was in contact with the side of the moth-eye film 12 where the convex portions were formed.
- a laminate 10 was produced by pressure bonding with a laminator at 0.1 MPa and a speed of 1 m / min.
- the evaluation results of the adhesive strength of the laminate 10 and the presence or absence of sticking marks (adhesive residue) were as shown in Table 2 above.
- Examples 2 to 4 and Comparative Examples 4 to 7 (1) As the production monomer of the (meth) acrylic acid ester copolymer (A) comprising a random copolymer by living radical polymerization, those having the types and usage ratios shown in Table 2 above are used. By performing living radical polymerization under the same conditions as in Example 1 except that the addition amount of methyl-2-n-butylteranyl-propionate and AIBN and the polymerization time were adjusted, various (meth) acrylic acid esters were prepared. A solution of polymer (A) was produced. The properties of each copolymer are shown in Table 2 above.
- Comparative Example 1 (1) As a production monomer of (meth) acrylic acid ester copolymer by free radical polymerization, 2-ethylhexyl acrylate (same as above) and 4-hydroxybutyl acrylate (same as above) in a mass ratio of 95: 5 A solution of 2EHA / 4HBA (meth) acrylic acid ester copolymer was prepared by free radical polymerization as described below. The properties of this copolymer are shown in Table 2 above.
- Comparative Examples 2 and 3 As the production monomer of the (meth) acrylic acid ester copolymer by free radical polymerization, the types and usage ratios shown in Table 2 above were used, and the addition amount of AIBN and the polymerization time were adjusted. Except for the above, various (meth) acrylic acid ester copolymers were produced by the same free radical polymerization as in Comparative Example 1. The properties of each copolymer are shown in Table 2 above.
- Examples 1 to 4 good results were obtained with respect to both adhesive strength and the presence or absence of sticking marks (adhesive residue).
- Examples 1 to 3 in which the amount of cyclohexyl acrylate in the acrylic acid ester copolymer (A) was increased to a predetermined amount, after being allowed to stand for 120 hours in an environment of 60 ° C. and a relative humidity of 95%. Even if it existed, the favorable result in which a sticking mark did not remain was obtained.
- Comparative Examples 1 to 3, 6, and 7 in which the area ratio occupied by the component having a molecular weight of 100,000 or less calculated based on the GPC curve is 3.0% or more of the whole are all. Good results were not obtained in the mark test. Since Comparative Example 4 did not have a structure derived from the monomer (c) as a monomer unit constituting the acrylate copolymer, cohesive failure occurred in the adhesive layer in the measurement of adhesive force. In Comparative Example 5, since the blending ratio of the monomer (b) when synthesizing the acrylate copolymer was too large, zipping occurred in the measurement of the adhesive strength of 10 m / min.
- the vibration may damage the projection of the moth-eye film, which is not preferable as a laminate.
- the confirmation test of a sticking mark it worsened compared with the Example.
- the weight average molecular weight (Mw) is 600,000 as described above. It is thought that it is the cause which made the pasting worse also that it is less than.
- Laminated body 11 Base material 12: Moss eye film (antireflection film) 12a: Convex part 12b: Base part 12c: Swelling part 12x: Resin remaining film layer 12y: Film substrate 12z: Adhesive layer 13: Protective film 14: Concave film 21: Support film 22: Adhesive layer 23: Adhesive Glue residue)
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Abstract
Description
図1は、実施形態1の積層体の断面模式図である。図1に示すように、実施形態1の積層体10は、反射防止フィルム12と、上記反射防止フィルム12上に貼り付けられた保護フィルム13とを有する。実施形態1の積層体は、基材11上に貼り付けられており、基材11表面で生じる反射を低減することができる。
1,6-ヘキサンジオールジ(メタ)アクリレート、ポリプロピレングリコールジ(メタ)アクリレート、ヒドロキシピバリン酸ネオペンチルグリコールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ)アクリレート、3-アクリロイルオキシグリセリンモノメタクリレート、2,2’-ビス(4-(メタ)アクリロイルオキシポリエチレンオキシフェニル)プロパン、2,2’-ビス(4ー(メタ)アクリロイルオキシポリプロピレンオキシフェニル)プロパン、ジシクロペンタニルジ(メタ)アクリレート、ビス[(メタ)アクリロイルオキシエチル]ヒドロキシエチルイソシアネート、フェニルグリシジルエーテルアクリレートトリレンジイソシアネート、アジピン酸ジビニル等の2官能モノマー;
トリメチロールプロパントリ(メタ)アクリレート、トリメチロールエタントリ(メタ)アクリレート、トリス[(メタ)アクリロイルオキシエチル]イソシアネート、ペンタエリスリトールトリ(メタ)アクリレート等の3官能モノマー;
ペンタエリスリトールテトラ(メタ)アクリレート、グリセリンジ(メタ)アクリレートヘキサメチレンジイソシアネート等の4官能モノマー;
ジペンタエリスリトールモノヒドロキシペンタ(メタ)アクリレート等の5官能モノマー;
ジペンタエリスリトールヘキサ(メタ)アクリレート等の6官能モノマー等が挙げられる。
ジエチレングリコールモノ(メタ)アクリレート、トリエチレングリコールモノ(メタ)アクリレート、テトラエチレングリコールモノ(メタ)アクリレート、ノナエチレングリコールモノ(メタ)アクリレート、テトラデカエチレングリコールモノ(メタ)アクリレート、トリエイコサエチレングリコールモノ(メタ)アクリレート、ポリエチレングリコールモノ(メタ)アクリレート、メトキシジエチレングリコール(メタ)アクリレート、メトキシトリエチレングリコール(メタ)アクリレート、メトキシテトラエチレングリコール(メタ)アクリレート、メトキシノナエチレングリコール(メタ)アクリレート、メトキシテトラデカエチレングリコール(メタ)アクリレート、メトキシトリエイコサエチレングリコール(メタ)アクリレート、メトキシポリエチレングリコール(メタ)アクリレート、フェノキシジエチレングリコール(メタ)アクリレート、フェノキシテトラエチレングリコール(メタ)アクリレート、フェノキシヘキサエチレングリコール(メタ)アクリレート、フェノキシノナエチレングリコール(メタ)アクリレート、フェノキシポリエチレングリコール(メタ)アクリレート等のポリエチレングリコール構造単位を有するモノマー;
N-エチル(メタ)アクリルアミド、N-n-プロピル(メタ)アクリルアミド、N-イソプロピル(メタ)アクリルアミド、N-シクロプロピル(メタ)アクリルアミド、N-メチル-N-エチル(メタ)アクリルアミド、N,N-ジメチル(メタ)アクリルアミド、N,N-ジエチル(メタ)アクリルアミド、N-メチル-N-イソプロピル(メタ)アクリルアミド、N-メチル-N-n-プロピル(メタ)アクリルアミド、N-(メタ)アクリロイルモルホリン、N-(メタ)アクリロイルピロリジン、N-(メタ)アクリロイルピぺリジン、N-ビニル-2-ピロリドン、N-メチレンビスアクリルアミド、N-メトキシプロピル(メタ)アクリルアミド、N-イソプロポキシプロピル(メタ)アクリルアミド、N-エトキシプロピル(メタ)アクリルアミド、N-1-メトキシメチルプロピル(メタ)アクリルアミド、N-メトキシエトキシプロピル(メタ)アクリルアミド、N-1-メチル-2-メトキシエチル(メタ)アクリルアミド、N-メチル-N-n-プロピル(メタ)アクリルアミド、N-(1,3-ジオキソラン-2-イル)(メタ)アクリルアミド等のアミド基を有するモノマー;
N,N-ジメチルアミノエチル(メタ)アクリレート、N,N-ジメチルアミノプロピル(メタ)アクリルアミド、N,N-(ビスメトキシメチル)カルバミルオキシエチルメタクリレート、N-メトキシメチルカルバミルオキシエチルメタクリレート等のアミノ基を有するモノマー;
2-(メタ)アクリロイルオキシエチルフタル酸、2-(メタ)アクリロイルオキシプロピルフタル酸、2-(メタ)アクリロイルオキシエチルコハク酸等のカルボキシル基を有するモノマー;
モノ(2-メタクリロイルオキシエチル)アシッドホスフェート、モノ(2-アクリロイルオキシエチル)アシッドホスフェート等のリン酸基を有するモノマー;
(メタ)アクリロイルオキシエチルトリメチルアンモニウムクロライド、(メタ)アクリロイルオキシプロピルトリメチルアンモニウムクロライド等の4級アンモニウム塩基を有するモノマー;
2-アクリルアミド-2-メチルプロパンスルホン酸、2-アクリルアミド-2-フェニルプロパンスルホン酸、(メタ)アクリロイルオキシエチルスルホン酸ナトリウム、(メタ)アクリロイルオキシエチルスルホン酸アンモニウム、アリルスルホン酸、メタリルスルホン酸、ビニルスルホン酸、スチレンスルホン酸、スルホン酸ソーダエトキシメタクリレート等のスルホン基を有するモノマー;
これらの親水基を有する分子量500~50000の重合性オリゴマー等が挙げられる。また、親水性モノマー及び/又は親水性オリゴマーとして、分子中にアミノ酸骨格を有する(メタ)アクリルモノマー及び/又はオリゴマーを用いることもできる。更に、親水性モノマー及び/又は親水性オリゴマーとして、分子中に糖骨格を有する(メタ)アクリルモノマー及び/又はオリゴマーを用いることもできる。
(メタ)アクリル酸エステル共重合体(A)は、単量体単位として、少なくとも、非環状の炭素数4~9のアルキル基を有する(メタ)アクリル酸アルキルエステルモノマー(a)、脂肪族環を有する(メタ)アクリル酸エステルモノマー(b)、及び、架橋剤(B)と反応性の官能基を有するモノマー(c)を由来とする化学構造を有している。なお、(メタ)アクリル酸アルキルエステルとは、アクリル酸アルキルエステルとメタクリル酸アルキルエステルの両方を意味する。他の類似の用語も同様に解する。
上記(メタ)アクリル酸エステル系共重合体(A)は、例えば、下記一般式(1);
次に、上記粘着剤組成物の必須成分の一つである架橋剤(B)について説明する。架橋剤(B)の好適な例としては、イソシアネート系架橋剤、エポキシ系架橋剤、アジリジン系架橋剤、金属キレート系架橋剤等が挙げられる。なお、架橋剤(B)は、上記共重合体(A)を構成する単量体成分のうち、架橋剤との間で反応性を示すモノマー(c)との関係で選択することが好ましい。例えば、上記単量体(c)が水酸基含有モノマーである場合は、イソシアネート系架橋剤を用いることが好ましい。一方、上記単量体(c)がカルボキシル基含有モノマー又はアミノ基含有モノマーである場合は、エポキシ系架橋剤、アジリジン系架橋剤又は金属キレート系架橋剤を用いることが好ましい。
本実施形態における粘着剤組成物に対しては、上記(メタ)アクリル酸エステル共重合体(A)及び架橋剤(B)以外に、種々の成分を添加することができる。そのような成分としては、例えば、酸化防止剤、帯電防止剤、屈折率調整剤、光拡散剤、紫外線吸収剤、赤外線吸収剤、着色剤、反応性希釈剤、レベリング剤等が挙げられる。
支持フィルム21としては、特に限定されず、例えば、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレートなどのポリエステルフィルム、ポリエチレンフィルム、ポリプロピレンフィルム、セロファン、ジアセチルセルロースフィルム、トリアセチルセルロースフィルム、アセチルセルロースブチレートフィルム、ポリ塩化ビニルフィルム、ポリ塩化ビニリデンフィルム、ポリビニルアルコールフィルム、エチレン-酢酸ビニル共重合体フィルム、ポリスチレンフィルム、ポリカーボネートフィルム、ポリメチルペンテンフィルム、ポリスルホンフィルム、ポリエーテルエーテルケトンフィルム、ポリエーテルスルホンフィルム、ポリエーテルイミドフィルム、ポリイミドフィルム、フッ素樹脂フィルム、ポリアミドフィルム、アクリル樹脂フィルム、ノルボルネン系樹脂フィルム、シクロオレフィン樹脂フィルム等が挙げられる。なお、保護フィルム13を貼付した状態で検品作業を行う、又は、需要者の好みにより保護フィルム13を貼付した状態のままその上から視認するような使用が要求される観点からは、支持フィルム21としては透明であることが好ましい。
粘着剤組成物は、上記各種成分を撹拌下、順に添加することにより調製される。なお、粘着剤組成物は、必要に応じて希釈溶媒を用いて希釈することができる。これにより、粘着剤組成物の均一化を図り、かつ塗工に必要な粘度の調整を行うことが容易となる。
上述の方法に従い、隣り合う頂点間の幅が可視光波長以下である凸部12aを有する反射防止フィルム12を製造する。
ゲルパーミエーションクロマトグラフィー(GPC)法により、標準ポリスチレン換算の重量平均分子量Mw、数平均分子量Mn、及び、分子量が10万以下の低分子量成分の含有量(面積%)を、以下の条件により求めた。
測定装置:東ソー社製の高速GPC装置「HLC-8120GPC」に、高速カラム「TSK gurd column HXL-H」、「TSK Gel GMHXL」、及び、「TSK Gel G2000 HXL」(以上、全て東ソー社製)をこの順序で連結したものを用いて測定した。
カラム温度:40℃、送液速度:1.0mL/分、検出器:示差屈折率計
以下の各例で得られた積層体10について、モスアイフィルム(反射防止フィルム)12と保護フィルム13の層間の粘着力を、0.3m/min又は10m/minの引き剥がし速度にて保護フィルム13の側を180°の方向に引き剥がす以外、JIS Z0237:2009に準じて粘着力(mN/25mm)を測定した。結果は、下記表2に示す。なお、引き剥がし速度0.3m/minでの粘着力は、40~150mN/25mmであることが好ましい。また、10m/minでの粘着力は、40~1000mN/25mmであることが好ましい。
以下の各例で得られた積層体10について、モスアイフィルム12側裏面(凸部が形成されている面とは反対側の面)を、粘着剤を用いて、平坦な黒アクリル板(スミペックス960、住友化学社製)に貼り合わせた。次に、これらの積層体10を、以下の各種耐久条件に120時間供した後、23℃、相対湿度50%にて24時間静置した。続いて、上記積層体の保護フィルムを剥がし、露出したモスアイフィルム12の凸部側に、高さ30cmの距離から蛍光灯をかざし、その反射の様子(色相の変化)を観察した。図24に示される写真の基準に基づき、◎、○、△、×の4段階にて評価した。図24は、貼り跡の評価基準として用いた異なる反射率をもつサンプルの写真図である。結果は、下記表2に示す。表2において、◎は全く反射光量の増加を感じず、貼り跡が全く残っていないもの、○はほとんど反射光量の増加を感じず、貼り跡がほとんど残っていないもの、△はやや反射光量の増加を感じ、貼り跡が残っているため、良好であるとはいえないもの、×は反射光量の増加を感じ、貼り跡が残っているため、不良品扱いとなるものを表している。
1)23℃、相対湿度(RH)50%
2)80℃、乾燥条件下
3)60℃、相対湿度(RH)95%
(1)リビングラジカル重合によるランダム共重合体からなる(メタ)アクリル酸エステル共重合体(A)の製造
金属テルル(Aldrich社製、製品名:Tellurium(-40mesh))6.38g(50mmol)をテトラハイドロフラン(THF)50mlに懸濁させ、これにn-ブチルリチウム(Aldrich社製、1.6mol/Lヘキサン溶液)34.4ml(55mmol)を、室温でゆっくり滴下した。滴下後の反応溶液を金属テルルが完全に消失するまで撹拌した。撹拌後の反応溶液に、エチル-2-ブロモ-イソブチレート10.7g(55mmol)を室温で加え、更に2時間撹拌した。反応終了後、減圧下で溶媒を濃縮し、続いて減圧蒸留して、黄色油状物のエチル-2-メチル-2-n-ブチルテラニル-プロピオネート8.98g(収率59.5%)を得た。
アルゴン置換したグローブボックス内で、上記方法で製造したエチル-2-メチル-2-n-ブチルテラニル-プロピオネート68.5μL、ブチルアクリレート(同上)110g、シクロヘキシルアクリレート(同上)28.5g、4-ヒドロキシブチルアクリレート(同上)4.3g、及び、2,2’-アゾビス(イソブチロニトリル)(AIBN)(Aldrich社製)4.6mgを60℃で20時間反応させた。
上記(1)で製造したランダム共重合体からなる(メタ)アクリル酸エステル共重合体(A)100質量部(固形分)と、架橋剤(B)であるイソシアヌレート型HDI(日本ポリウレタン工業社製、商品名「コロネートHXR」、固形分100%)3.0質量部と、アセチルアセトン5.0質量部と、ジブチル錫ジラウレート0.025質量部とを、溶媒であるメチルエチルケトンに溶解して、固形分濃度14質量%の粘着剤組成物の溶液に調製した。
(i)アクリル酸エステル共重合体(A)
BA:ブチルアクリレート
CHA:シクロヘキシルアクリレート
4-HBA:4-ヒドロキシブチルアクリレート
2EHA:2-エチルヘキシルアクリレート
(ii)架橋剤(B)
イソシアネート系架橋剤
コロネートHXR:ヘキサメチレンジイソシアネートの3量体(イソシアヌレート体)(日本ポリウレタン社製、商品名「コロネートHXR」)
(iii)重合方法
LRP:リビングラジカル重合
FRP:フリーラジカル重合
支持フィルム21として、厚さ38μmの帯電防止性防汚ポリエチレンテレフタレートフィルム(東レ社製、商品名「PET38SLD52」)の一方の面に、上記(2)で得た粘着剤組成物を、ナイフ式塗工機により、乾燥厚さが5μmになるように塗布したのち、90℃にて1分間加熱乾燥して粘着層22を形成した。
アクリル系樹脂からなり凸部間距離が150~200nmであり、凸部のアスペクト比が約1.5のモスアイフィルム(反射防止フィルム)12を用意した。
(1)リビングラジカル重合によるランダム共重合体からなる(メタ)アクリル酸エステル共重合体(A)の製造
単量体として、上記表2に示す種類と使用割合のものを用い、エチル-2-メチル-2-n-ブチルテラニル-プロピオネート及びAIBNの添加量、並びに、重合時間を調整したこと以外は実施例1と同様の条件でリビングラジカル重合を行うことにより、各種の(メタ)アクリル酸エステル共重合体(A)の溶液を製造した。各共重合体の性状を上記表2に示す。
上記(1)で製造した各(メタ)アクリル酸エステル共重合体(A)100質量部(固形分)と、上記表2に示す種類と量の各架橋剤、アセチルアセトン5.0質量部とジブチル錫ジラウレート0.025質量部を、溶媒であるメチルエチルケトンに溶解して、実施例1と同様の固形分濃度を有する各種の粘着剤組成物の溶液を調製した。
上記(2)で得られた各種の粘着剤組成物の溶液を用いたこと以外は、実施例1と同様にして保護フィルムを得た。
上記(3)で得られた保護フィルムを用いたこと以外は、実施例1と同様にして積層体を作製した。積層体の粘着力及び貼り跡の有無の評価結果は上記表2に示すとおりであった。
(1)フリーラジカル重合による(メタ)アクリル酸エステル共重合体の製造
単量体として2-エチルへキシルアクリレート(同上)と4-ヒドロキシブチルアクリレート(同上)とを、質量比95:5の割合で用い、以下に示すフリーラジカル重合により、2EHA/4HBAの(メタ)アクリル酸エステル共重合体の溶液を製造した。この共重合体の性状を上記表2に示す。
撹拌機、温度計、還流冷却器、及び、窒素導入管を備えた反応装置に、窒素ガスを封入後、酢酸エチル90質量部、2-エチルヘキシルアクリレート95質量部、4-ヒドロキシブチルアクリレート5質量部、重合開始剤2,2’-アゾビス(イソブチルニトリル)(AIBN)0.2質量部を仕込み、撹拌しながら酢酸エチルの還流温度で7時間反応させた。反応終了後、トルエンで希釈することにより固形分40質量%である(メタ)アクリル酸エステル共重合体の溶液を得た。
上記(1)で得られた(メタ)アクリル酸エステル共重合体の溶液を用い、得られる粘着剤組成物の固形分濃度を30質量%としたこと以外は実施例1と同様の方法を用いて粘着剤組成物の溶液を調製した。
上記(2)で調製された各種の粘着剤組成物の溶液を用い、粘着層22の乾燥膜厚が20μmとなるように上記粘着剤組成物の溶液を塗布し、乾燥させたこと以外は、実施例1と同様に保護フィルムを得た。
上記(3)で得られた保護フィルムを用いたこと以外は実施例1と同様の方法を用いて積層体を得た。この積層体の諸特性は、上記表2に示されている。
(1)フリーラジカル重合による(メタ)アクリル酸エステル共重合体の製造
単量体として、上記表2に示す種類と使用割合のものを用い、AIBNの添加量、及び、重合時間を調整したこと以外は比較例1と同様のフリーラジカル重合により、各種の(メタ)アクリル酸エステル共重合体を製造した。各共重合体の性状は、上記表2に示されている。
比較例2で得られた保護フィルムを用いて、モスアイフィルム12を下記表3の各フィルムに変更したこと以外は、比較例2と同様にして、積層体を作製した。すなわち、参考例1~4における保護フィルム自体は、比較例2で用いた保護フィルムと同じである。この積層体の諸特性を上記表2に示す。
11:基材
12:モスアイフィルム(反射防止フィルム)
12a:凸部
12b:下地部
12c:盛り上がり部
12x:樹脂残膜層
12y:フィルム基材
12z:粘着層
13:保護フィルム
14:凹部
21:支持フィルム
22:粘着層
23:粘着剤(貼り跡、糊残り)
Claims (10)
- 反射防止フィルムと、該反射防止フィルム上に貼り付けられた保護フィルムとを有し、
該反射防止フィルムの表面は、隣り合う凸部の頂点間の幅が可視光波長以下である複数の凸部を有し、
該保護フィルムは、支持フィルムと、該反射防止フィルムと接する粘着層とを有し、
該粘着層は、(メタ)アクリル酸エステル共重合体(A)を架橋剤(B)で架橋させて形成された材料からなる層であり、
該(メタ)アクリル酸エステル共重合体(A)の重量平均分子量は、60万以上、150万未満であり、
該(メタ)アクリル酸エステル共重合体(A)は、単量体成分全体を100質量%としたときに、非環状の炭素数4~9のアルキル基を有する(メタ)アクリル酸アルキルエステルモノマー(a)を70~98質量%含有し、脂肪族環を有する(メタ)アクリル酸エステルモノマー(b)を1.5~25質量%含有し、該架橋剤(B)との間で反応性を示す官能基を有する(メタ)アクリル系モノマー(c)を0.5~5質量%含有する単量体成分を重合して形成されたものであり、
ゲル浸透クロマトグラフィー測定により得られる、該(メタ)アクリル酸エステル共重合体(A)全体の面積を100%としたときの、分子量が10万以下の成分が占める面積割合は、3.0%未満である
ことを特徴とする積層体。 - 前記架橋剤(B)は、イソシアネート系架橋剤であることを特徴とする請求項1記載の積層体。
- 前記(メタ)アクリル系モノマー(c)は、水酸基含有モノマーであることを特徴とする請求項2記載の積層体。
- 前記水酸基含有モノマーは、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請求項3記載の積層体。
- 前記(メタ)アクリル酸エステル共重合体(A)の分子量分布は、1.2~3.0であることを特徴とする請求項1~4のいずれかに記載の積層体。
- ゲル浸透クロマトグラフィー測定により得られる、前記(メタ)アクリル酸エステル共重合体(A)全体の面積を100%としたときの、分子量が10万以下の成分が占める面積割合は、1.0%以上であることを特徴とする請求項1~5のいずれかに記載の積層体。
- 前記架橋剤(B)の配合量は、前記(メタ)アクリル酸エステル共重合体(A)100質量部に対して、0.01~15質量部であることを特徴とする請求項1~6のいずれかに記載の積層体。
- 前記(メタ)アクリル酸アルキルエステルモノマー(a)は、ブチルアクリレートであることを特徴とする請求項1~7のいずれかに記載の積層体。
- 前記脂肪族環を有する(メタ)アクリル酸エステルモノマー(b)は、シクロヘキシル(メタ)アクリレートであることを特徴とする請求項1~8のいずれかに記載の積層体。
- 前記反射防止フィルムの複数の凸部同士の間隙は、該反射防止フィルムの内部方向に尖った形状を有していることを特徴とする請求項1~9のいずれかに記載の積層体。
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EP2821817A1 (en) | 2015-01-07 |
EP2821817B1 (en) | 2018-06-20 |
JP2014139678A (ja) | 2014-07-31 |
JP2014221554A (ja) | 2014-11-27 |
CN104483721B (zh) | 2016-09-07 |
KR20140097489A (ko) | 2014-08-06 |
EP2821817A4 (en) | 2015-05-27 |
CN103959106B (zh) | 2015-09-09 |
CN103959106A (zh) | 2014-07-30 |
KR101648280B1 (ko) | 2016-08-12 |
JP5596240B2 (ja) | 2014-09-24 |
JPWO2013081145A1 (ja) | 2015-04-27 |
US20140342121A1 (en) | 2014-11-20 |
CN104483721A (zh) | 2015-04-01 |
JP5540156B2 (ja) | 2014-07-02 |
JP5793224B2 (ja) | 2015-10-14 |
US9862167B2 (en) | 2018-01-09 |
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