KR20220129252A - Adhesive composition, adhesive sheet, optical member and image display device produced using the same - Google Patents
Adhesive composition, adhesive sheet, optical member and image display device produced using the same Download PDFInfo
- Publication number
- KR20220129252A KR20220129252A KR1020210033897A KR20210033897A KR20220129252A KR 20220129252 A KR20220129252 A KR 20220129252A KR 1020210033897 A KR1020210033897 A KR 1020210033897A KR 20210033897 A KR20210033897 A KR 20210033897A KR 20220129252 A KR20220129252 A KR 20220129252A
- Authority
- KR
- South Korea
- Prior art keywords
- acrylate
- meth
- sensitive adhesive
- pressure
- adhesive composition
- Prior art date
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- 239000000203 mixture Substances 0.000 title claims abstract description 86
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 30
- 230000003287 optical effect Effects 0.000 title claims abstract description 28
- 239000000853 adhesive Substances 0.000 title claims abstract description 27
- 229920006243 acrylic copolymer Polymers 0.000 claims abstract description 35
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 133
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 115
- 239000000178 monomer Substances 0.000 claims description 96
- -1 pentabromophenyl Chemical group 0.000 claims description 71
- 239000010410 layer Substances 0.000 claims description 43
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 25
- 239000002105 nanoparticle Substances 0.000 claims description 22
- 229920001519 homopolymer Polymers 0.000 claims description 21
- 125000004432 carbon atom Chemical group C* 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- 125000000524 functional group Chemical group 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 7
- 238000001029 thermal curing Methods 0.000 claims description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 6
- 239000012948 isocyanate Substances 0.000 claims description 6
- 150000002513 isocyanates Chemical class 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- OADIZUFHUPTFAG-UHFFFAOYSA-N 2-[2-(2-ethylhexoxy)ethoxy]ethanol Chemical compound CCCCC(CC)COCCOCCO OADIZUFHUPTFAG-UHFFFAOYSA-N 0.000 claims description 5
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical group OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- 125000003368 amide group Chemical group 0.000 claims description 4
- 125000003277 amino group Chemical group 0.000 claims description 4
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 4
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- 125000003700 epoxy group Chemical group 0.000 claims description 4
- 125000001033 ether group Chemical group 0.000 claims description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 4
- 230000009477 glass transition Effects 0.000 claims description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 4
- 125000005462 imide group Chemical group 0.000 claims description 4
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 4
- 125000000542 sulfonic acid group Chemical group 0.000 claims description 4
- 229920001567 vinyl ester resin Polymers 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- 239000011787 zinc oxide Substances 0.000 claims description 4
- 229910001928 zirconium oxide Inorganic materials 0.000 claims description 4
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 claims description 3
- WNJWHQIMUOWKLD-UHFFFAOYSA-N 6-naphthalen-1-yloxyhexyl prop-2-enoate Chemical compound C1=CC=C2C(OCCCCCCOC(=O)C=C)=CC=CC2=C1 WNJWHQIMUOWKLD-UHFFFAOYSA-N 0.000 claims description 3
- 229910000505 Al2TiO5 Inorganic materials 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- AYJRCSIUFZENHW-DEQYMQKBSA-L barium(2+);oxomethanediolate Chemical compound [Ba+2].[O-][14C]([O-])=O AYJRCSIUFZENHW-DEQYMQKBSA-L 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- UWXJKSWTTNLDIF-UHFFFAOYSA-N ethyne;yttrium Chemical compound [Y].[C-]#[C] UWXJKSWTTNLDIF-UHFFFAOYSA-N 0.000 claims description 3
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 claims description 3
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 3
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims description 3
- 239000000395 magnesium oxide Substances 0.000 claims description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000391 magnesium silicate Substances 0.000 claims description 3
- 229910052919 magnesium silicate Inorganic materials 0.000 claims description 3
- 235000019792 magnesium silicate Nutrition 0.000 claims description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 3
- NQNBVCBUOCNRFZ-UHFFFAOYSA-N nickel ferrite Chemical compound [Ni]=O.O=[Fe]O[Fe]=O NQNBVCBUOCNRFZ-UHFFFAOYSA-N 0.000 claims description 3
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 claims description 3
- AABBHSMFGKYLKE-SNAWJCMRSA-N propan-2-yl (e)-but-2-enoate Chemical compound C\C=C\C(=O)OC(C)C AABBHSMFGKYLKE-SNAWJCMRSA-N 0.000 claims description 3
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- VEALVRVVWBQVSL-UHFFFAOYSA-N strontium titanate Chemical compound [Sr+2].[O-][Ti]([O-])=O VEALVRVVWBQVSL-UHFFFAOYSA-N 0.000 claims description 3
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- 229960001763 zinc sulfate Drugs 0.000 claims description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 3
- XBYXAXCEHOPRPY-UHFFFAOYSA-N 1,1,8,8,8-pentafluorooctyl prop-2-enoate Chemical compound FC(F)(F)CCCCCCC(F)(F)OC(=O)C=C XBYXAXCEHOPRPY-UHFFFAOYSA-N 0.000 claims description 2
- 125000004018 acid anhydride group Chemical group 0.000 claims description 2
- 125000001183 hydrocarbyl group Chemical group 0.000 claims 2
- 239000010408 film Substances 0.000 description 36
- 229920005989 resin Polymers 0.000 description 18
- 239000011347 resin Substances 0.000 description 18
- 150000002430 hydrocarbons Chemical group 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 10
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 7
- 150000001875 compounds Chemical class 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000002834 transmittance Methods 0.000 description 6
- 239000002313 adhesive film Substances 0.000 description 5
- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 239000012788 optical film Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 238000006116 polymerization reaction Methods 0.000 description 5
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 4
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 4
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 4
- OEURXIFGOPBMJF-UHFFFAOYSA-N 1-o-(2-hydroxyethyl) 2-o-(2-prop-2-enoyloxyethyl) benzene-1,2-dicarboxylate Chemical compound OCCOC(=O)C1=CC=CC=C1C(=O)OCCOC(=O)C=C OEURXIFGOPBMJF-UHFFFAOYSA-N 0.000 description 3
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 150000008065 acid anhydrides Chemical class 0.000 description 3
- 125000000217 alkyl group Chemical group 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000012965 benzophenone Substances 0.000 description 3
- 238000004132 cross linking Methods 0.000 description 3
- 238000001723 curing Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000007142 ring opening reaction Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000013638 trimer Substances 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- BKKVYNMMVYEBGR-UHFFFAOYSA-N (2,3,4,5,6-pentabromophenyl) prop-2-enoate Chemical compound BrC1=C(Br)C(Br)=C(OC(=O)C=C)C(Br)=C1Br BKKVYNMMVYEBGR-UHFFFAOYSA-N 0.000 description 2
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 2
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 2
- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 2
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 2
- TVQDRZGNLJFEQK-UHFFFAOYSA-N 2-naphthalen-2-ylsulfanylethyl prop-2-enoate Chemical compound C1=CC=CC2=CC(SCCOC(=O)C=C)=CC=C21 TVQDRZGNLJFEQK-UHFFFAOYSA-N 0.000 description 2
- SXIFAEWFOJETOA-UHFFFAOYSA-N 4-hydroxy-butyl Chemical group [CH2]CCCO SXIFAEWFOJETOA-UHFFFAOYSA-N 0.000 description 2
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 244000028419 Styrax benzoin Species 0.000 description 2
- 235000000126 Styrax benzoin Nutrition 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 235000008411 Sumatra benzointree Nutrition 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 229960002130 benzoin Drugs 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- 238000005227 gel permeation chromatography Methods 0.000 description 2
- 235000019382 gum benzoic Nutrition 0.000 description 2
- 238000013007 heat curing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 238000000016 photochemical curing Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 229940014800 succinic anhydride Drugs 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- YRHRIQCWCFGUEQ-UHFFFAOYSA-N thioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC=CC=C3SC2=C1 YRHRIQCWCFGUEQ-UHFFFAOYSA-N 0.000 description 2
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 2
- QNODIIQQMGDSEF-UHFFFAOYSA-N (1-hydroxycyclohexyl)-phenylmethanone Chemical compound C=1C=CC=CC=1C(=O)C1(O)CCCCC1 QNODIIQQMGDSEF-UHFFFAOYSA-N 0.000 description 1
- ZXHZWRZAWJVPIC-UHFFFAOYSA-N 1,2-diisocyanatonaphthalene Chemical compound C1=CC=CC2=C(N=C=O)C(N=C=O)=CC=C21 ZXHZWRZAWJVPIC-UHFFFAOYSA-N 0.000 description 1
- MSAHTMIQULFMRG-UHFFFAOYSA-N 1,2-diphenyl-2-propan-2-yloxyethanone Chemical compound C=1C=CC=CC=1C(OC(C)C)C(=O)C1=CC=CC=C1 MSAHTMIQULFMRG-UHFFFAOYSA-N 0.000 description 1
- IAUGBVWVWDTCJV-UHFFFAOYSA-N 1-(prop-2-enoylamino)propane-1-sulfonic acid Chemical compound CCC(S(O)(=O)=O)NC(=O)C=C IAUGBVWVWDTCJV-UHFFFAOYSA-N 0.000 description 1
- WHVCGSUZBJVDAE-UHFFFAOYSA-N 1-[4,5-diphenyl-2-(2,4,6-tribromophenyl)imidazol-2-yl]-4,5-diphenyl-2-(2,4,6-tribromophenyl)imidazole Chemical compound BrC1=CC(Br)=CC(Br)=C1C(N1C2(N=C(C(=N2)C=2C=CC=CC=2)C=2C=CC=CC=2)C=2C(=CC(Br)=CC=2Br)Br)=NC(C=2C=CC=CC=2)=C1C1=CC=CC=C1 WHVCGSUZBJVDAE-UHFFFAOYSA-N 0.000 description 1
- RWEAGLZFYKQPLZ-UHFFFAOYSA-N 1-[4,5-diphenyl-2-(2,4,6-trichlorophenyl)imidazol-2-yl]-4,5-diphenyl-2-(2,4,6-trichlorophenyl)imidazole Chemical compound ClC1=CC(Cl)=CC(Cl)=C1C(N1C2(N=C(C(=N2)C=2C=CC=CC=2)C=2C=CC=CC=2)C=2C(=CC(Cl)=CC=2Cl)Cl)=NC(C=2C=CC=CC=2)=C1C1=CC=CC=C1 RWEAGLZFYKQPLZ-UHFFFAOYSA-N 0.000 description 1
- VKQJCUYEEABXNK-UHFFFAOYSA-N 1-chloro-4-propoxythioxanthen-9-one Chemical compound S1C2=CC=CC=C2C(=O)C2=C1C(OCCC)=CC=C2Cl VKQJCUYEEABXNK-UHFFFAOYSA-N 0.000 description 1
- SDXHBDVTZNMBEW-UHFFFAOYSA-N 1-ethoxy-2-(2-hydroxyethoxy)ethanol Chemical compound CCOC(O)COCCO SDXHBDVTZNMBEW-UHFFFAOYSA-N 0.000 description 1
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 1
- PIZHFBODNLEQBL-UHFFFAOYSA-N 2,2-diethoxy-1-phenylethanone Chemical compound CCOC(OCC)C(=O)C1=CC=CC=C1 PIZHFBODNLEQBL-UHFFFAOYSA-N 0.000 description 1
- 125000004201 2,4-dichlorophenyl group Chemical group [H]C1=C([H])C(*)=C(Cl)C([H])=C1Cl 0.000 description 1
- UXCIJKOCUAQMKD-UHFFFAOYSA-N 2,4-dichlorothioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(Cl)=CC(Cl)=C3SC2=C1 UXCIJKOCUAQMKD-UHFFFAOYSA-N 0.000 description 1
- BTJPUDCSZVCXFQ-UHFFFAOYSA-N 2,4-diethylthioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC(CC)=C3SC2=C1 BTJPUDCSZVCXFQ-UHFFFAOYSA-N 0.000 description 1
- IETCLBGYEVVQQL-UHFFFAOYSA-N 2-(2,4-dibromophenyl)-1-[2-(2,4-dibromophenyl)-4,5-diphenylimidazol-2-yl]-4,5-diphenylimidazole Chemical compound BrC1=CC(Br)=CC=C1C(N1C2(N=C(C(=N2)C=2C=CC=CC=2)C=2C=CC=CC=2)C=2C(=CC(Br)=CC=2)Br)=NC(C=2C=CC=CC=2)=C1C1=CC=CC=C1 IETCLBGYEVVQQL-UHFFFAOYSA-N 0.000 description 1
- RXPLWIYPJFSJCC-UHFFFAOYSA-N 2-(2-bromophenyl)-1-[2-(2-bromophenyl)-4,5-diphenylimidazol-2-yl]-4,5-diphenylimidazole Chemical compound BrC1=CC=CC=C1C(N1C2(N=C(C(=N2)C=2C=CC=CC=2)C=2C=CC=CC=2)C=2C(=CC=CC=2)Br)=NC(C=2C=CC=CC=2)=C1C1=CC=CC=C1 RXPLWIYPJFSJCC-UHFFFAOYSA-N 0.000 description 1
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- SCUZVMOVTVSBLE-UHFFFAOYSA-N prop-2-enenitrile;styrene Chemical compound C=CC#N.C=CC1=CC=CC=C1 SCUZVMOVTVSBLE-UHFFFAOYSA-N 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- BWYYYTVSBPRQCN-UHFFFAOYSA-M sodium;ethenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C=C BWYYYTVSBPRQCN-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- RINCXYDBBGOEEQ-UHFFFAOYSA-N succinic anhydride Chemical compound O=C1CCC(=O)O1 RINCXYDBBGOEEQ-UHFFFAOYSA-N 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 125000004434 sulfur atom Chemical group 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- QHGNHLZPVBIIPX-UHFFFAOYSA-N tin(ii) oxide Chemical class [Sn]=O QHGNHLZPVBIIPX-UHFFFAOYSA-N 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 1
- ZMANZCXQSJIPKH-UHFFFAOYSA-N triethylamine Natural products CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
-
- 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
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- 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]
-
- 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
-
- 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
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Adhesive Tapes (AREA)
Abstract
Description
본 발명은, 점착제 조성물, 이를 이용하여 제조된 점착 시트, 광학 부재 및 표시 장치에 관한 것이다.The present invention relates to a pressure-sensitive adhesive composition, a pressure-sensitive adhesive sheet manufactured using the same, an optical member, and a display device.
평판표시장치에는 액정 표시 장치(Liquid Crystal Display; LCD), 플라즈마 디스플레이 패널(Plasma Display Panel; PDP), 유기 발광 표시 장치(Organic Electro Luminescence Display; OLED) 등이 있다. 평판표시장치는 디스플레이 패널과 광학 필름을 포함한다. 상기 광학 필름으로는, 편광 필름, 위상차 필름, 눈부심 방지 필름, 광시야각 보상 필름, 휘도 향상 필름 등이 사용되고 있다. 이러한 광학 필름들을 서로 적층하거나 광학 필름을 디스플레이 패널에 부착하는 경우, 광학 투명 점착제(Optically Clear Adhesive; OCA) 내지 감압 점착제(Pressure Sensitive Adhesive; PSA)가 사용되고 있다. The flat panel display includes a liquid crystal display (LCD), a plasma display panel (PDP), an organic electroluminescence display (OLED), and the like. A flat panel display device includes a display panel and an optical film. As the optical film, a polarizing film, a retardation film, an anti-glare film, a wide viewing angle compensation film, a brightness improving film, and the like are used. When these optical films are laminated on each other or the optical film is attached to a display panel, an optically clear adhesive (OCA) or a pressure sensitive adhesive (PSA) is used.
상기 광학용 점착제는 높은 투과율과 낮은 헤이즈가 요구되며, 다양한 기재와의 밀착성, 내열성 및 내습성 등의 내구성과 같은 물성을 만족시켜야 한다. 또한, 디스플레이 패널 또는 광학 필름 표면에 결함이 발생하는 경우 원활한 교체를 위해 리워크성도 필요하다.The optical pressure-sensitive adhesive requires high transmittance and low haze, and must satisfy physical properties such as adhesion to various substrates, durability such as heat resistance and moisture resistance. In addition, if a defect occurs on the surface of the display panel or optical film, reworkability is also required for smooth replacement.
한편, 최근에는 기술 수준의 발달로 광학용 표시소자인 터치스크린 패널(이하, '터치 패널'이라고 함)이 상술한 평판표시장치 등의 표시면 측에 형성되고, 표시 장치와 좌표축을 즉석에서 인식하여 입력을 실시하는 디바이스의 조합으로, 표시 장치 및 소프트웨어와 조합하여 다양한 조작성을 실현할 수 있게 되었다.On the other hand, in recent years, with the development of technology, a touch screen panel (hereinafter, referred to as a 'touch panel'), which is an optical display element, is formed on the display surface side of the flat panel display, etc., and the display device and the coordinate axis are recognized immediately. Various operability can be realized in combination with a display device and software as a combination of devices that perform input.
터치 패널에는 저항막 방식, 정전 용량 방식 등의 다양한 구동 방식이 존재한다. 두 개의 전도성 ITO(Indium Tin Oxide)층으로 구성된 정전 용량 방식은, 상하 전극간의 물리적 접촉이 아닌 전자기적 변화를 통해 신호를 검출하는 방식으로, 저항막 방식의 터치 패널 대비 반응속도가 빠르고, 우수한 조작감으로 인해 최근에는 정전 용량 방식이 널리 사용되고 있다.Various driving methods such as a resistive film type and a capacitive type exist in the touch panel. The capacitive method composed of two conductive ITO (Indium Tin Oxide) layers detects signals through electromagnetic changes rather than physical contact between the upper and lower electrodes. For this reason, the capacitive method has been widely used in recent years.
상기 광학용 점착제는, 터치 패널과 광학 부재의 사이에 구비되어 두 소자를 접착시키기 위해서도 사용될 수 있다.The optical adhesive is provided between the touch panel and the optical member and may be used to bond the two devices.
그러나, 정전 용량 방식의 터치 패널을 구현하기 위한 ITO(Indium Tin Oxide)층은 패터닝에 의해 단차가 발생하여, 굴절률 차에 따른 시인성의 문제가 있었다.However, an indium tin oxide (ITO) layer for implementing a capacitive touch panel has a step difference due to patterning, and thus there is a problem of visibility due to a difference in refractive index.
이러한 문제를 해결하기 위하여, 종래에는 전극패턴과 광학 부재 사이에 굴절률을 보정함으로써 시인성을 개선하기 위한 별도의 고굴절 패턴층을 구비하였다.In order to solve this problem, conventionally, a separate high refractive index pattern layer for improving visibility by correcting the refractive index between the electrode pattern and the optical member is provided.
그러나, 별도의 고굴절 패턴층을 구비할 경우, 상기 고굴절 패턴층의 상면 상에 다른 부재를 부착시키기 위한 점착층을 별도로 코팅하여야 하는 등 공정 경제성의 측면에서 불리한 면이 존재하였다.However, when a separate high refractive index pattern layer is provided, an adhesive layer for attaching another member on the upper surface of the high refractive index pattern layer needs to be separately coated, which is disadvantageous in terms of process economics.
이러한 문제를 해결하기 위하여, 대한민국 공개특허 제10-2016-0045199호는 점착필름에 고굴절의 나노입자를 포함함으로써, 일반적인 점착제의 굴절률인 1.48보다 높으면서 각종 기재간의 우수한 접착성을 갖는 점착 필름을 개시하고 있다. 그러나, 점착필름이 나노입자를 포함할 경우, 헤이즈(Haze) 특성이 불량할 수 있고, 100nm 이하의 나노입자를 사용할 경우 조액의 점도가 상승하는 문제점이 있어, 이러한 문제점이 개선된 점착 조성물에 대한 필요성이 대두된다.In order to solve this problem, Korean Patent Application Laid-Open No. 10-2016-0045199 discloses an adhesive film having excellent adhesion between various substrates while containing nanoparticles of high refractive index in the adhesive film, which is higher than 1.48, the refractive index of a general adhesive, and have. However, when the adhesive film contains nanoparticles, haze properties may be poor, and when nanoparticles of 100 nm or less are used, there is a problem in that the viscosity of the crude liquid increases. necessity is raised
본 발명은, 굴절률이 향상된 점착제 조성물을 제공하는 것을 발명의 목적으로 한다.An object of the present invention is to provide a pressure-sensitive adhesive composition having an improved refractive index.
또한, 본 발명은, 단차 흡수성이 향상된 점착제 조성물을 제공하는 것을 발명의 목적으로 한다.Another object of the present invention is to provide a pressure-sensitive adhesive composition having improved step water absorption.
또한, 본 발명은, 헤이즈(Haze) 특성이 개선된 점착제 조성물을 제공하는 것을 발명의 목적으로 한다.In addition, an object of the present invention is to provide a pressure-sensitive adhesive composition having improved haze properties.
또한, 본 발명은, 상기 점착제 조성물을 이용하여 제조된 점착 시트를 제공하는 것을 발명의 목적으로 한다.Another object of the present invention is to provide a pressure-sensitive adhesive sheet prepared by using the pressure-sensitive adhesive composition.
또한, 본 발명은, 상기 점착제 조성물로 형성된 점착제층을 포함하는 광학 부재를 제공하는 것을 발명의 목적으로 한다.Moreover, this invention makes it an object of invention to provide the optical member containing the adhesive layer formed from the said adhesive composition.
또한, 본 발명은, 상기 광학 부재를 포함하는 표시 장치를 제공하는 것을 발명의 목적으로 한다.Another object of the present invention is to provide a display device including the optical member.
본 발명은, 굴절률이 1.55 내지 1.70인 아크릴계 공중합체를 포함하는, 점착제 조성물에 관한 것이다.The present invention relates to a pressure-sensitive adhesive composition comprising an acrylic copolymer having a refractive index of 1.55 to 1.70.
본 발명은, 그 제1 관점에 있어서, 상기 아크릴계 공중합체는, 동종중합체의 굴절률이 1.58 이상인 고굴절 아크릴 단량체로부터 유래된 반복단위를 포함하는 것일 수 있다.In the present invention, in the first aspect, the acrylic copolymer may include a repeating unit derived from a high refractive acrylic monomer having a refractive index of 1.58 or more of the homopolymer.
본 발명은, 그 제2 관점에 있어서, 상기 동종중합체의 굴절률이 1.58 이상인 고굴절 아크릴 단량체는, 펜타브로모페닐(메타)아크릴레이트, 2-(나프탈렌-2-일옥시)에틸(메타)아크릴레이트, 2-(나프탈렌-2-일티오)에틸(메타)아크릴레이트, 비페닐메틸(메타)아크릴레이트 및 1-파이렌메틸(메타)아크릴레이트로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있다.In the present invention, in the second aspect, the high refractive acrylic monomer having a refractive index of 1.58 or more of the homopolymer is pentabromophenyl (meth) acrylate, 2-(naphthalen-2-yloxy) ethyl (meth) acrylate , 2- (naphthalen-2-ylthio) ethyl (meth) acrylate, biphenylmethyl (meth) acrylate and 1-pyrene methyl (meth) acrylate containing one or more selected from the group consisting of can
본 발명은, 그 제3 관점에 있어서, 상기 동종중합체의 굴절률이 1.58 이상인 고굴절 아크릴 단량체는, 상기 아크릴계 공중합체 총 중량에 대하여 10 내지 70 중량%로 포함되는 것일 수 있다.In the present invention, in the third aspect, the high refractive acrylic monomer having a refractive index of 1.58 or more of the homopolymer may be included in an amount of 10 to 70% by weight based on the total weight of the acrylic copolymer.
본 발명은, 그 제4 관점에 있어서, 상기 아크릴계 공중합체는, 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체로부터 유래된 반복단위 및 가교 가능한 관능기를 갖는 중합성 단량체로부터 유래된 반복단위 중 적어도 하나 이상을 더 포함하는 것일 수 있다.In the present invention, in the fourth aspect, the acrylic copolymer is at least one of a repeating unit derived from an acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms and a repeating unit derived from a polymerizable monomer having a crosslinkable functional group. may further include
본 발명은, 그 제5 관점에 있어서, 상기 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체는, 메틸(메타)아크릴레이트, 에틸(메타)아크릴레이트, n-프로필(메타)아크릴레이트, 이소프로필(메타)아크릴레이트, n-부틸(메타)아크릴레이트, sec-부틸(메타)아크릴레이트, t-부틸(메타)아크릴레이트, 이소부틸(메타)아크릴레이트, 펜틸(메타)아크릴레이트, 헥실(메타)아크릴레이트, 2-에틸헥실(메타)아크릴레이트, n-옥틸(메타)아크릴레이트, 이소옥틸(메타)아크릴레이트, 이소보닐아크릴레이트, n-노닐(메타)아크릴레이트, 이소노닐(메타)아크릴레이트, n-데실(메타)아크릴레이트, 이소데실(메타)아크릴레이트, n-도데실(메타)아크릴레이트, n-트리데실(메타)아크릴레이트, n-테트라데실(메타)아크릴레이트, 펜타플루오로옥틸아크릴레이트, 2-에틸헥실디글리콜아크릴레이트, 노닐페놀(에틸렌옥사이드 4몰 변성)아크릴레이트 및 6-(1-나프틸옥시)-1-헥실아크릴레이트로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있다.In the present invention, in the fifth aspect, the acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms is methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl ( meth) acrylate, n-butyl (meth) acrylate, sec-butyl (meth) acrylate, t-butyl (meth) acrylate, isobutyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) ) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, isobornyl acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate, n-decyl (meth) acrylate, isodecyl (meth) acrylate, n-dodecyl (meth) acrylate, n-tridecyl (meth) acrylate, n-tetradecyl (meth) acrylate, 1 selected from the group consisting of pentafluorooctyl acrylate, 2-ethylhexyldiglycol acrylate, nonylphenol (modified by 4 moles of ethylene oxide) acrylate, and 6-(1-naphthyloxy)-1-hexyl acrylate It may include more than one species.
본 발명은, 그 제6 관점에 있어서, 상기 가교 가능한 관능기를 갖는 중합성 단량체는, 술폰산기 함유 단량체, 인산기 함유 단량체, 시아노기 함유 단량체, 비닐에스테르 단량체, 방향족 비닐 단량체, 카르복실기 함유 단량체, 산무수물기 함유 단량체, 히드록시기 함유 단량체, 아미드기 함유 단량체, 아미노기 함유 단량체, 이미드기 함유 단량체, 에폭시기 함유 단량체 및 에테르기 함유 단량체로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있다.In the sixth aspect of the present invention, the polymerizable monomer having a crosslinkable functional group includes a sulfonic acid group-containing monomer, a phosphoric acid group-containing monomer, a cyano group-containing monomer, a vinyl ester monomer, an aromatic vinyl monomer, a carboxyl group-containing monomer, and an acid anhydride. It may include at least one selected from the group consisting of a group-containing monomer, a hydroxyl group-containing monomer, an amide group-containing monomer, an amino group-containing monomer, an imide group-containing monomer, an epoxy group-containing monomer, and an ether group-containing monomer.
본 발명은, 그 제7 관점에 있어서, 상기 점착제 조성물은, 광 개시제, 열 경화제 및 나노입자 중 적어도 하나 이상을 더 포함하는 것일 수 있다.In the present invention, in the seventh aspect, the pressure-sensitive adhesive composition may further include at least one or more of a photoinitiator, a thermal curing agent, and nanoparticles.
본 발명은, 그 제8 관점에 있어서, 상기 열 경화제는, 이소시아네이트계 가교제를 포함하는 것일 수 있다.According to the eighth aspect of the present invention, the thermal curing agent may include an isocyanate-based crosslinking agent.
본 발명은, 그 제9 관점에 있어서, 상기 나노입자는, 산화 티탄, 산화 아연, 산화 지르코늄, 산화 마그네슘, 지르코늄 티탄산염, 규산 지르코늄, 스트론륨 티탄산염, 알류미늄 티탄산염, 실리콘 페라이트, 니켈 페라이트, 코발트 페라이트, 탄산 바륨, 탄화규소, 탄화이트륨, 규산 마그네슘, 황산 아연 및 황산 바륨으로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있다.In the ninth aspect of the present invention, the nanoparticles are titanium oxide, zinc oxide, zirconium oxide, magnesium oxide, zirconium titanate, zirconium silicate, strontium titanate, aluminum titanate, silicon ferrite, nickel ferrite. , cobalt ferrite, barium carbonate, silicon carbide, yttrium carbide, magnesium silicate, zinc sulfate, and may include one or more selected from the group consisting of barium sulfate.
본 발명은, 그 제10 관점에 있어서, 상기 점착제 조성물의 유리전이온도(Tg)가 -10℃이하인 것일 수 있다.In the present invention, in the tenth aspect, the glass transition temperature (Tg) of the pressure-sensitive adhesive composition may be -10 ℃ or less.
본 발명은, 그 제11 관점에 있어서, 상기 점착제 조성물에 의해 제조된 점착제층의 굴절률이 1.58 이상인 것일 수 있다.In the present invention, in the eleventh aspect, the refractive index of the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition may be 1.58 or more.
본 발명은, 그 제12 관점에 있어서, 상기 점착제 조성물에 의해 제조된 점착제층의 헤이즈가 2% 미만인 것일 수 있다.In the present invention, in the twelfth aspect, the haze of the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition may be less than 2%.
또한, 본 발명은, 상기 점착제 조성물을 이용하여 제조된, 점착 시트에 관한 것이다.Moreover, this invention relates to the adhesive sheet manufactured using the said adhesive composition.
본 발명은, 그 제13 관점에 있어서, 상기 점착 시트의 굴절률이 1.58 이상인 것일 수 있다.According to the thirteenth aspect of the present invention, the refractive index of the pressure-sensitive adhesive sheet may be 1.58 or more.
또한, 본 발명은, 상기 점착제 조성물로 형성된 점착제층을 포함하는, 광학 부재에 관한 것이다.Moreover, this invention relates to the optical member containing the adhesive layer formed from the said adhesive composition.
또한, 본 발명은, 상기 광학 부재를 포함하는, 표시 장치에 관한 것이다.Moreover, this invention relates to the display apparatus containing the said optical member.
본 발명에 따른 점착제 조성물에 의하면, 종래 점착제 조성물 대비 굴절률이 향상되어, 별도의 고굴절 패턴층을 포함하지 않고도 시인성이 개선되는 것일 수 있다.According to the pressure-sensitive adhesive composition according to the present invention, the refractive index is improved compared to the conventional pressure-sensitive adhesive composition, and the visibility may be improved without including a separate high refractive index pattern layer.
또한, 본 발명에 따른 점착제 조성물에 의하면, 종래 점착제 조성물 대비 단차 흡수성이 향상되어, 넓은 온도 범위에 대해서도 우수한 신뢰성을 나타내는 것일 수 있다.In addition, according to the pressure-sensitive adhesive composition according to the present invention, the step absorbency is improved compared to the conventional pressure-sensitive adhesive composition, and may exhibit excellent reliability even in a wide temperature range.
또한, 본 발명에 따른 점착제 조성물에 의하면, 종래 점착제 조성물 대비 헤이즈(Haze) 특성이 향상되어, 광학용 점착제로써의 사용에 특히 적합한 것일 수 있다.In addition, according to the pressure-sensitive adhesive composition according to the present invention, haze (Haze) characteristics are improved compared to the conventional pressure-sensitive adhesive composition, it may be particularly suitable for use as an optical pressure-sensitive adhesive.
또한, 본 발명에 따른 점착제 조성물에 의하면, 종래 점착제 조성물 대비 조액의 점도 상승을 방지할 수 있어, 공정성이 더욱 향상되는 것일 수 있다.In addition, according to the pressure-sensitive adhesive composition according to the present invention, it is possible to prevent an increase in the viscosity of the crude liquid compared to the conventional pressure-sensitive adhesive composition, and thus processability may be further improved.
본 발명은, 굴절률이 1.55 내지 1.70인 아크릴계 공중합체를 포함하는 것을 특징으로 하는 점착제 조성물, 이를 이용하여 제조된 점착 시트, 광학 부재 및 표시 장치를 제공한다.The present invention provides a pressure-sensitive adhesive composition comprising an acrylic copolymer having a refractive index of 1.55 to 1.70, and a pressure-sensitive adhesive sheet, an optical member, and a display device manufactured using the same.
본 발명의 점착제 조성물은, 굴절률이 1.55 내지 1.70인 아크릴계 공중합체를 포함함으로써, 점착제층의 굴절률, 헤이즈(Haze) 특성 및 신뢰성을 향상시킬 수 있다.The pressure-sensitive adhesive composition of the present invention, by including the acrylic copolymer having a refractive index of 1.55 to 1.70, it is possible to improve the refractive index, haze (Haze) characteristics and reliability of the pressure-sensitive adhesive layer.
본 발명에 기재된 「(메타)아크릴레이트」는, 아크릴레이트 및 메타크릴레이트를 모두 포함하는 개념으로 정의된다.The "(meth)acrylate" described in the present invention is defined as a concept including both acrylates and methacrylates.
<점착제 조성물><Adhesive composition>
본 발명의 점착제 조성물은, 아크릴계 공중합체를 포함하며, 필요에 따라 광 개시제, 열 경화제 및 나노입자 중 적어도 하나 이상을 더 포함하는 것일 수 있다.The pressure-sensitive adhesive composition of the present invention may include an acrylic copolymer and, if necessary, further include at least one or more of a photoinitiator, a thermal curing agent, and nanoparticles.
본 발명의 점착제 조성물은, 유리전이온도(Tg)가 -10℃ 이하인 것이 바람직하다. 이 경우, 상기 점착제 조성물에 의해 형성된 점착제층이 양호한 점착 특성을 나타낼 수 있다.It is preferable that the adhesive composition of this invention has a glass transition temperature (Tg) of -10 degrees C or less. In this case, the pressure-sensitive adhesive layer formed by the pressure-sensitive adhesive composition may exhibit good adhesive properties.
본 발명의 점착제 조성물에 의해 제조된 점착제층은, 굴절률이 1.58 이상인 것일 수 있으며, 더욱 바람직하게는 1.58 내지 1.70일 수 있고, 가장 바람직하게는, 1.60 내지 1.70일 수 있다. 이 경우, 터치 패널을 포함하는 표시 장치에서 별도의 고굴절 패턴층을 포함하지 않고도 시인성이 개선되는 것일 수 있다. 특히, 상기 본 발명의 점착제 조성물에 의해 제조된 점착제층은, 과량의 나노 입자를 포함하지 않고도 고굴절률을 나타낼 수 있어, 광학 특성의 측면에서 이점이 있다.The pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition of the present invention may have a refractive index of 1.58 or more, more preferably 1.58 to 1.70, and most preferably, 1.60 to 1.70. In this case, visibility may be improved without including a separate high refractive index pattern layer in the display device including the touch panel. In particular, the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition of the present invention can exhibit a high refractive index without including an excessive amount of nanoparticles, there is an advantage in terms of optical properties.
또한, 본 발명의 점착제 조성물에 의해 제조된 점착제층은, 헤이즈(Haze)가 2% 미만인 것일 수 있다. 이 경우, 광투과성이 향상되어, 표시 장치 등의 광학용 점착제로써의 사용에 특히 적합한 것일 수 있다.In addition, the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition of the present invention, haze (Haze) may be less than 2%. In this case, the light transmittance is improved, and it may be particularly suitable for use as an optical adhesive for a display device or the like.
아크릴계 공중합체Acrylic copolymer
본 발명에 따른 점착제 조성물은, 점착 물성과 내구성 발현을 위해 아크릴계 공중합체를 포함한다.The pressure-sensitive adhesive composition according to the present invention includes an acrylic copolymer for adhesion properties and durability.
상기 아크릴계 공중합체는, 굴절률이 1.55 내지 1.70인 것이 바람직하다. 아크릴계 공중합체의 굴절률이 1.55 내지 1.70일 경우, 점착제층 내지 점착 시트의 목표 굴절률과 근접하므로, 별도의 나노 입자를 포함하지 않더라도 점착제층의 고굴절률을 구현할 수 있어, 공정성 및 광투과성의 측면에서 이점이 있을 수 있고, 탄성률이 향상되어 내구성의 저하를 방지할 수 있다. 또한, 필요에 따라 고굴절의 나노 입자를 더 포함함으로써, 종래 점착제 조성물 대비 더욱 향상된 굴절률을 나타낼 수 있다.The acrylic copolymer preferably has a refractive index of 1.55 to 1.70. When the refractive index of the acrylic copolymer is 1.55 to 1.70, it is close to the target refractive index of the pressure-sensitive adhesive layer or the pressure-sensitive adhesive sheet. There may be, and the elastic modulus may be improved to prevent deterioration of durability. In addition, by further including nanoparticles of high refractive index if necessary, it is possible to exhibit a more improved refractive index compared to the conventional pressure-sensitive adhesive composition.
상기 아크릴계 공중합체는, 굴절률이 1.55 내지 1.70이면, 그 구조는 특별히 제한되지 않으나, 동종중합체(Homopolymer)의 굴절률이 1.58 이상인 고굴절 아크릴 단량체로부터 유래된 반복단위를 포함하는 것이 바람직하다.If the refractive index of the acrylic copolymer is 1.55 to 1.70, the structure thereof is not particularly limited, but preferably includes a repeating unit derived from a high refractive acrylic monomer having a refractive index of 1.58 or more of a homopolymer.
상기 동종중합체(Homopolymer)의 굴절률이 1.58 이상인 고굴절 아크릴 단량체는, 예를 들어 펜타브로모페닐(메타)아크릴레이트(Pentabromophenyl (meth)acrylate), 2-(나프탈렌-2-일옥시)에틸(메타)아크릴레이트(2-(Naphthalen-2-yloxy)ethyl (meth)acrylate), 2-(나프탈렌-2-일티오)에틸(메타)아크릴레이트(2-(Naphthalen-2-ylthio)ethyl (meth)acrylate), 비페닐메틸(메타)아크릴레이트 (Biphenyl methyl (meth)acrylate) 및 1-파이렌메틸(메타)아크릴레이트(1-Pyrene methyl (meth)acrylate)로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있으나, 이에 한정되지 않음은 전술한 바와 같다.The high refractive acrylic monomer having a refractive index of 1.58 or more of the homopolymer is, for example, pentabromophenyl (meth)acrylate, 2-(naphthalen-2-yloxy)ethyl (meth) Acrylate (2-(Naphthalen-2-yloxy)ethyl (meth)acrylate), 2-(Naphthalen-2-ylthio)ethyl (meth)acrylate ), biphenyl methyl (meth) acrylate, and 1-pyrene methyl (meth) acrylate (1-Pyrene methyl (meth) acrylate) containing at least one selected from the group consisting of may be, but is not limited thereto as described above.
상기 동종중합체(Homopolymer)의 굴절률이 1.58 이상인 고굴절 아크릴 단량체는, 매트릭스의 굴절률 및 탄성률을 향상시킬 수 있는 것이면, 그 함량은 특별히 한정되지 않으나, 아크릴계 공중합체 총 중량에 대하여 10 내지 70 중량%로 포함되는 것이 바람직하며, 더욱 바람직하게는, 15 내지 60 중량%일 수 있다. 동종중합체(Homopolymer)의 굴절률이 1.58 이상인 고굴절 아크릴 단량체의 함량이 10 중량% 미만일 경우, 굴절률 및 탄성률 향상의 효과가 미미하며, 70 중량%를 초과할 경우, 점착제 조성물 자체의 점착 물성과 내구성이 저하될 수 있다.The high refractive acrylic monomer having a refractive index of 1.58 or more of the homopolymer is not particularly limited as long as it can improve the refractive index and elastic modulus of the matrix, but it is included in an amount of 10 to 70% by weight based on the total weight of the acrylic copolymer. Preferably, it may be 15 to 60% by weight, more preferably. When the content of the high refractive acrylic monomer having a refractive index of 1.58 or more of the homopolymer is less than 10% by weight, the effect of improving the refractive index and elastic modulus is insignificant, and when it exceeds 70% by weight, the adhesive properties and durability of the pressure-sensitive adhesive composition itself are reduced can be
본 발명의 일 실시 예에 있어서, 상기 아크릴계 공중합체는, 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체로부터 유래된 반복단위 및 가교 가능한 관능기를 갖는 중합성 단량체로부터 유래된 반복단위 중 적어도 하나 이상을 더 포함하는 것일 수 있다.In an embodiment of the present invention, the acrylic copolymer further comprises at least one of a repeating unit derived from an acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms and a repeating unit derived from a polymerizable monomer having a crosslinkable functional group. may include.
상기 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체는, (메타)아크릴레이트계 단량체인 것이 바람직하나, 이에 한정되는 것은 아니다. The acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms is preferably a (meth)acrylate-based monomer, but is not limited thereto.
상기 탄화수소기는, 지방족 탄화수소기 및 방향족 탄화수소기를 포함하는 것일 수 있다. 상기 탄화수소기에 포함되는 수소 원자는, 알킬기, 할로젠 원자, 알콕시기, 페녹시기 등으로 치환될 수 있으며, 상기 탄화수소기에 포함되는 -CH2-는, 산소 원자, 황 원자, 질소 원자 등의 헤테로 원자 또는 -(CH2CH2O)m-로 치환될 수 있다. 이 경우, 상기 m은, 1 내지 4일 수 있다.The hydrocarbon group may include an aliphatic hydrocarbon group and an aromatic hydrocarbon group. A hydrogen atom included in the hydrocarbon group may be substituted with an alkyl group, a halogen atom, an alkoxy group, a phenoxy group, or the like, and -CH 2 - included in the hydrocarbon group is a hetero atom such as an oxygen atom, a sulfur atom, or a nitrogen atom. Or -(CH 2 CH 2 O)m- may be substituted. In this case, m may be 1 to 4.
상기 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체는, 점착제 조성물에 점착 특성 내지 응집력을 부여하는 것이면 특별히 제한되지 않는다.The acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms is not particularly limited as long as it imparts adhesive properties or cohesive force to the pressure-sensitive adhesive composition.
일 또는 복수의 실시 형태에 있어서, 상기 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체는, 메틸(메타)아크릴레이트, 에틸(메타)아크릴레이트, n-프로필(메타)아크릴레이트, 이소프로필(메타)아크릴레이트, n-부틸(메타)아크릴레이트, sec-부틸(메타)아크릴레이트, t-부틸(메타)아크릴레이트, 이소부틸(메타)아크릴레이트, 펜틸(메타)아크릴레이트, 헥실(메타)아크릴레이트, 2-에틸헥실(메타)아크릴레이트, n-옥틸(메타)아크릴레이트, 이소옥틸(메타)아크릴레이트, 이소보닐아크릴레이트, n-노닐(메타)아크릴레이트, 이소노닐(메타)아크릴레이트, n-데실(메타)아크릴레이트, 이소데실(메타)아크릴레이트, n-도데실(메타)아크릴레이트, n-트리데실(메타)아크릴레이트, n-테트라데실(메타)아크릴레이트, 펜타플루오로옥틸아크릴레이트, 2-에틸헥실디글리콜아크릴레이트, 노닐페놀(에틸렌옥사이드 4몰 변성)아크릴레이트 및 6-(1-나프틸옥시)-1-헥실아크릴레이트로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있으며, 입수의 용이성 측면에서, 2-에틸헥실(메타)아크릴레이트인 것이 바람직하다.In one or more embodiments, the acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms is methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) Acrylate, n-butyl (meth) acrylate, sec-butyl (meth) acrylate, t-butyl (meth) acrylate, isobutyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylic Rate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, isobornyl acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate , n-decyl (meth) acrylate, isodecyl (meth) acrylate, n-dodecyl (meth) acrylate, n-tridecyl (meth) acrylate, n-tetradecyl (meth) acrylate, pentafluoro At least one selected from the group consisting of rooctyl acrylate, 2-ethylhexyldiglycol acrylate, nonylphenol (4 mol modified ethylene oxide) acrylate, and 6-(1-naphthyloxy)-1-hexyl acrylate It may include, and in terms of ease of acquisition, it is preferably 2-ethylhexyl (meth) acrylate.
상기 아크릴계 공중합체가 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체로부터 유래된 반복단위를 갖는 경우, 상기 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체는, 아크릴계 공중합체 총 중량에 대하여 30 내지 90 중량%로 포함되는 것이 바람직하며, 더욱 바람직하게는 30 내지 60 중량%일 수 있다. 탄소수 1 내지 20의 탄화수소기를 갖는 아크릴 단량체의 함량이 30 중량% 미만일 경우, 점착력이 다소 저하될 수 있으며, 90 중량%를 초과할 경우, 응집력이 다소 저하될 수 있다.When the acrylic copolymer has a repeating unit derived from an acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms, the acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms is used in an amount of 30 to 90% by weight based on the total weight of the acrylic copolymer. It is preferably included, and more preferably 30 to 60% by weight. When the content of the acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms is less than 30% by weight, the adhesive force may be slightly lowered, and if it exceeds 90% by weight, the cohesive force may be somewhat reduced.
상기 가교 가능한 관능기를 갖는 중합성 단량체는, 가교제와 반응하여 높은 온도 또는 습도 조건 하에서 점착제의 응집력 파괴가 일어나지 않도록 화학 결합에 의한 응집력 또는 점착 강도를 부여하는 것이면 특별히 제한되지 않는다.The polymerizable monomer having the crosslinkable functional group is not particularly limited as long as it reacts with the crosslinking agent to impart cohesive force or adhesive strength by chemical bonding so that the cohesive force breakage of the pressure-sensitive adhesive does not occur under high temperature or humidity conditions.
일 또는 복수의 실시 형태에 있어서, 상기 가교 가능한 관능기를 갖는 중합성 단량체는, 술폰산기 함유 단량체, 인산기 함유 단량체, 시아노기 함유 단량체, 비닐에스테르 단량체, 방향족 비닐 단량체, 카르복실기 함유 단량체, 산무수물기 함유 단량체, 히드록시기 함유 단량체, 아미드기 함유 단량체, 아미노기 함유 단량체, 이미드기 함유 단량체, 에폭시기 함유 단량체 및 에테르기 함유 단량체로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있다.In one or more embodiments, the polymerizable monomer having a crosslinkable functional group is a sulfonic acid group-containing monomer, a phosphoric acid group-containing monomer, a cyano group-containing monomer, a vinyl ester monomer, an aromatic vinyl monomer, a carboxyl group-containing monomer, an acid anhydride group-containing monomer It may include at least one selected from the group consisting of a monomer, a hydroxyl group-containing monomer, an amide group-containing monomer, an amino group-containing monomer, an imide group-containing monomer, an epoxy group-containing monomer, and an ether group-containing monomer.
상기 술폰산기 함유 단량체는, 예를 들어, 스티렌술폰산, 알릴술폰산, 2-(메타)아크릴아미도-2-메틸프로페인술폰산, (메타)아크릴아미도프로페인술폰산, 술포프로필(메타)아크릴레이트, (메타)아크릴로일옥시나프탈렌술폰산, 비닐술폰산나트륨 등을 들 수 있다.The sulfonic acid group-containing monomer is, for example, styrenesulfonic acid, allylsulfonic acid, 2-(meth)acrylamido-2-methylpropanesulfonic acid, (meth)acrylamidopropanesulfonic acid, sulfopropyl (meth)acrylate , (meth)acryloyloxynaphthalenesulfonic acid, sodium vinylsulfonate, and the like.
상기 인산기 함유 단량체는, 예를 들어, 2-히드록시에틸아크릴로일포스페이트 등을 들 수 있으며, 상기 시아노기 함유 단량체는, 예를 들어, (메타)아크릴로니트릴 등을 들 수 있다.Examples of the phosphoric acid group-containing monomer include 2-hydroxyethyl acryloyl phosphate, and the cyano group-containing monomer includes, for example, (meth)acrylonitrile.
상기 비닐에스테르 단량체는, 예를 들어, 아세트산비닐, 프로피온산비닐, 라우르산비닐 등을 들 수 있으며, 상기 방향족 비닐 단량체는, 예를 들어, 스티렌, 클로로스티렌, 클로로메틸스티렌, α-메틸스티렌, 기타 치환된 스티렌 등을 들 수 있다.The vinyl ester monomer includes, for example, vinyl acetate, vinyl propionate, vinyl laurate, and the like, and the aromatic vinyl monomer is, for example, styrene, chlorostyrene, chloromethylstyrene, α-methylstyrene, and other substituted styrenes.
상기 카르복시기 함유 단량체는, 예를 들어, (메타)아크릴산, 크로톤산, 이소크로톤산, 카르복시에틸(메타)아크릴레이트, 카르복시펜틸(메타)아크릴레이트 등의 1가산; 말레인산, 이타콘산, 푸마르산 등의 2가산 및 이들의 모노알킬에스테르; 알킬기의 탄소수가 2 내지 3인 2-히드록시알킬(메타)아크릴레이트의 무수호박산 개환 부가체, 알킬렌기의 탄소수가 2 내지 4인 히드록시알킬렌글리콜(메타)아크릴레이트의 무수호박산 개환 부가체, 알킬기의 탄소수가 2 내지 3인 2-히드록시알킬(메타)아크릴레이트의 카프로락톤 부가체에 무수호박산을 개환 부가시킨 화합물 등을 들 수 있으며, 이들 중에서 (메타)아크릴산이 바람직하다.The carboxyl group-containing monomer, for example, monoacids such as (meth)acrylic acid, crotonic acid, isocrotonic acid, carboxyethyl (meth)acrylate, and carboxypentyl (meth)acrylate; diacids such as maleic acid, itaconic acid and fumaric acid and monoalkyl esters thereof; Ring-opening adduct of succinic acid anhydride of 2-hydroxyalkyl (meth)acrylate having 2 to 3 carbon atoms in the alkyl group, and ring-opening adduct of succinic anhydride in hydroxyalkylene glycol (meth)acrylate having 2 to 4 carbon atoms in the alkylene group , a compound obtained by ring-opening addition of succinic anhydride to the caprolactone adduct of 2-hydroxyalkyl (meth)acrylate having 2 to 3 carbon atoms in the alkyl group, among which (meth)acrylic acid is preferable.
상기 산무수물 함유 단량체는, 예를들어, 무수 말레산, 무수 이타콘산 및 이들의 산무수물체 등을 들 수 있으며, 상기 히드록시기 함유 단량체는, 예를 들어, 2-히드록시에틸(메타)아크릴레이트, 2-히드록시프로필(메타)아크릴레이트, 4-히드록시부틸(메타)아크릴레이트, 6-히드록시헥실(메타)아크릴레이트, 8-히드록시옥틸(메타)아크릴레이트, 10-히드록시데실(메타)아크릴레이트, 12-히드록시라우릴(메타)아크릴레이트, (4-히드록시메틸시클로헥실)메틸아크릴레이트, N-메틸올(메타)아크릴아미드, 비닐알콜, 알릴알콜, 2-히드록시에틸비닐에테르, 4-히드록시부틸비닐에테르, 디에틸렌글리콜모노비닐에테르, 2-아크릴로일옥시에틸-2-히드록시에틸프탈레이트 등을 들 수 있다.The acid anhydride-containing monomer includes, for example, maleic anhydride, itaconic anhydride, and acid anhydrides thereof, and the hydroxyl group-containing monomer is, for example, 2-hydroxyethyl (meth)acrylate , 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxyhexyl (meth) acrylate, 8-hydroxyoctyl (meth) acrylate, 10-hydroxydecyl (meth)acrylate, 12-hydroxylauryl (meth)acrylate, (4-hydroxymethylcyclohexyl)methyl acrylate, N-methylol (meth)acrylamide, vinyl alcohol, allyl alcohol, 2-hydroxy hydroxyethyl vinyl ether, 4-hydroxybutyl vinyl ether, diethylene glycol monovinyl ether, 2-acryloyloxyethyl-2-hydroxyethyl phthalate, etc. are mentioned.
상기 아미드기 함유 단량체는, 예를 들어, (메타)아크릴아미드, N-이소프로필아크릴아미드, N-3차부틸아크릴아미드, 3-히드록시프로필(메타)아크릴아미드, 4-히드록시부틸(메타)아크릴아미드, 6-히드록시헥실(메타)아크릴아미드, 8-히드록시옥틸(메타)아크릴아미드, 2-히드록시에틸헥실(메타)아크릴아미드 등을 들 수 있다.The amide group-containing monomer is, for example, (meth) acrylamide, N-isopropyl acrylamide, N-tert-butyl acrylamide, 3-hydroxypropyl (meth) acrylamide, 4-hydroxybutyl (meth) ) Acrylamide, 6-hydroxyhexyl (meth)acrylamide, 8-hydroxyoctyl (meth)acrylamide, 2-hydroxyethylhexyl (meth)acrylamide, etc. are mentioned.
상기 아미노기 함유 단량체는, 예를 들어, N,N-(디메틸아미노)에틸(메타)아크릴레이트, N,N-(디에틸아미노)에틸(메타)아크릴레이트, N,N-(디메틸아미노)프로필(메타)아크릴레이트 등을 들 수 있으며, 상기 이미드기 함유 단량체는, 예를 들어, 시클로헥실말레이미드, 이소프로필 말레이미드 등을 들 수 있다.The amino group-containing monomer is, for example, N,N- (dimethylamino) ethyl (meth) acrylate, N, N- (diethylamino) ethyl (meth) acrylate, N, N- (dimethylamino) propyl (meth)acrylate etc. are mentioned, As for the said imide group containing monomer, cyclohexyl maleimide, isopropyl maleimide, etc. are mentioned, for example.
상기 에폭시기 함유 단량체는, 예를 들어, (메트)아크릴산 글리시딜, (메트)아크릴산 메틸글리시딜 등을 들 수 있으며, 상기 에테르기 함유 단량체는, 예를 들어, 3-메톡시부틸(메타)아크릴레이트, 2-메톡시에틸(메타)아크릴레이트, 3-메톡시프로필(메타)아크릴레이트, 2-메톡시부틸(메타)아크릴레이트, 옥시에틸렌의 부가 몰수가 1 내지 15의 범위의 메톡시폴리에틸렌글리콜아크릴레이트, 에톡시-디에틸렌글리콜(메타)아크릴레이트, 에틸카르비톨(메타)아크릴레이트 등을 들 수 있다.The epoxy group-containing monomer includes, for example, (meth) glycidyl acrylate, methyl glycidyl (meth) acrylate, and the like, and the ether group-containing monomer is, for example, 3-methoxybutyl (meth) ) acrylate, 2-methoxyethyl (meth) acrylate, 3-methoxypropyl (meth) acrylate, 2-methoxybutyl (meth) acrylate and oxypolyethylene glycol acrylate, ethoxy-diethylene glycol (meth) acrylate, and ethyl carbitol (meth) acrylate.
상기 아크릴계 공중합체가 가교 가능한 관능기를 갖는 중합성 단량체로부터 유래된 반복단위를 갖는 경우, 상기 가교 가능한 관능기를 갖는 중합성 단량체는, 아크릴계 공중합체 총 중량에 대하여 0.05 내지 10 중량%로 포함되는 것이 바람직하며, 더욱 바람직하게는 1 내지 10 중량%일 수 있다. 가교 가능한 관능기를 갖는 중합성 단량체의 함량이 0.05 중량% 미만일 경우, 점착제 조성물의 응집력이 감소함에 따라 내구성이 저하될 수 있으며, 10 중량%를 초과할 경우, 점착력 및 내구성이 다소 저하될 수 있다.When the acrylic copolymer has a repeating unit derived from a polymerizable monomer having a crosslinkable functional group, the polymerizable monomer having a crosslinkable functional group is preferably included in an amount of 0.05 to 10% by weight based on the total weight of the acrylic copolymer. and more preferably 1 to 10% by weight. When the content of the polymerizable monomer having a crosslinkable functional group is less than 0.05% by weight, the durability may decrease as the cohesive force of the pressure-sensitive adhesive composition decreases, and if it exceeds 10% by weight, the adhesive strength and durability may be somewhat reduced.
상기 아크릴계 공중합체는, 상기 단량체들 이외에도 점착력을 저하시키지 않는 범위 내에서, 본 발명이 속한 기술분야에서 통상적으로 사용되는 다른 단량체를 더 포함하는 것일 수 있으며, 예를 들어, 아크릴계 공중합체 총 중량에 대하여 10 중량% 이하로 더 포함될 수 있다.The acrylic copolymer may further include other monomers commonly used in the art to which the present invention pertains within a range that does not reduce adhesive strength in addition to the above monomers, for example, to the total weight of the acrylic copolymer It may be further included in an amount of 10% by weight or less.
상기 아크릴계 공중합체는, 겔투과크로마토그래피(Gel Permeation Chromatography; GPC)에 의해 측정된 중량평균분자량(폴리스티렌 환산; Mw)이 50만 내지 200만일 수 있으며, 더욱 바람직하게는 70만 내지 170만일 수 있다. 아크릴계 공중합체의 중량평균분자량이 50만 미만일 경우, 자외선 중합 및 경화 후 점착필름의 구조 내에 사슬 구조가 단순하고, 길이가 짧아지기 때문에 기포가 발생하는 등 신뢰성의 측면에서 불리하고, 변색 등에 따른 내구성 저하가 발생할 수 있고, 200만을 초과할 경우, 점착필름 제조 시 점착수지 조성물의 점도가 너무 높아서 제조에 필요한 적정 점도를 맞추기 위해 다량의 단량체의 희석이 필요하며, 이에 따라 자외선 중합 및 경화 시 높은 에너지를 필요로 하거나 반응하지 않은 단량체가 잔류할 수 있다.The acrylic copolymer may have a weight average molecular weight (in terms of polystyrene; Mw) measured by Gel Permeation Chromatography (GPC) of 500,000 to 2 million, more preferably 700,000 to 1.7 million . When the weight average molecular weight of the acrylic copolymer is less than 500,000, the chain structure is simple in the structure of the adhesive film after UV polymerization and curing, and the length is short, so it is disadvantageous in terms of reliability, such as bubbles, and durability due to discoloration. Degradation may occur, and if it exceeds 2 million, the viscosity of the adhesive resin composition is too high when manufacturing the adhesive film, so a large amount of monomer is required to dilute to meet the appropriate viscosity required for manufacturing, and accordingly, high energy during UV polymerization and curing may be required or unreacted monomers may remain.
상기 아크릴계 공중합체의 제조방법은 특별히 한정되지 않는다. 예를 들어, 본 발명이 속한 기술분야에서 통상적으로 사용되는, 괴상중합, 용액중합, 유화중합, 현탁중합, UV 중합 등의 방법이 사용될 수 있으며, 바람직하게는, 용액중합 또는 UV 중합이 사용될 수 있다.The manufacturing method of the said acrylic copolymer is not specifically limited. For example, methods such as bulk polymerization, solution polymerization, emulsion polymerization, suspension polymerization, UV polymerization, which are commonly used in the art to which the present invention pertains, may be used, and preferably, solution polymerization or UV polymerization may be used. have.
광 개시제photoinitiator
본 발명의 점착제 조성물은, UV 대역의 광, 예컨대 400nm 이하의 파장에서도 광경화 반응 효율적으로 유도하기 위하여 광 개시제를 더 포함할 수 있다.The pressure-sensitive adhesive composition of the present invention may further include a photoinitiator in order to efficiently induce a photocuring reaction even in light of a UV band, for example, a wavelength of 400 nm or less.
상기 광 개시제는, 활성 광선이 조사됨으로 인하여 광경화 반응을 개시할 수 있는 성분이라면 특별히 제한되지 않으며, 종래 또는 이후에 개발되는 광 개시제를 사용할 수 있다.The photoinitiator is not particularly limited as long as it is a component capable of initiating a photocuring reaction due to irradiation with actinic light, and a conventionally developed photoinitiator may be used.
본 발명의 광 개시제는, 일 또는 복수의 실시 형태에 있어서, 아세토페논계, 벤조페논계, 트리아진계, 티오크산톤계, 옥심계, 벤조인계, 및 비이미다졸계 화합물로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있다.The photoinitiator of the present invention, in one or more embodiments, is selected from the group consisting of acetophenone-based, benzophenone-based, triazine-based, thioxanthone-based, oxime-based, benzoin-based, and biimidazole-based compounds It may include one or more.
상기 아세토페논계 화합물로는, 예를 들면, 디에톡시아세토페논, 2-히드록시-2-메틸-1-페닐프로판-1-온, 벤질디메틸케탈, 2-히드록시-1-[4-(2-히드록시에톡시)페닐]-2-메틸프로판-1-온, 1-히드록시시클로헥실페닐케톤, 2-메틸-1-(4-메틸티오페닐)-2-모르폴리노프로판-1-온, 2-벤질-2-디메틸아미노-1-(4-모르폴리노페닐)부탄-1-온, 2-히드록시-2-메틸[4-(1-메틸비닐)페닐]프로판-1-온의 올리고머 등을 들 수 있다. Examples of the acetophenone-based compound include diethoxyacetophenone, 2-hydroxy-2-methyl-1-phenylpropan-1-one, benzyldimethylketal, and 2-hydroxy-1-[4-( 2-hydroxyethoxy)phenyl]-2-methylpropan-1-one, 1-hydroxycyclohexylphenylketone, 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropane-1 -one, 2-benzyl-2-dimethylamino-1-(4-morpholinophenyl)butan-1-one, 2-hydroxy-2-methyl[4-(1-methylvinyl)phenyl]propane-1 -On oligomers, etc. are mentioned.
상기 벤조페논계 화합물로는, 예를 들면, 벤조페논, 2,2'-하이드록시-4,4'-디메톡시벤조페논, o-벤조일벤조산메틸, 4-페닐조페논, 4-벤조일-4'-메틸디페닐설파이드, 3,3',4,4'-테트라(t-부틸퍼옥시카보닐)벤조페논, 2,4,6-트리메틸벤조페논 등을 들 수 있다.Examples of the benzophenone-based compound include benzophenone, 2,2'-hydroxy-4,4'-dimethoxybenzophenone, methyl o-benzoylbenzoate, 4-phenylzophenone, and 4-benzoyl-4. '-methyldiphenyl sulfide, 3,3',4,4'-tetra(t-butylperoxycarbonyl)benzophenone, 2,4,6-trimethylbenzophenone, etc. are mentioned.
상기 트리아진계 화합물로는, 예를 들면, 2,4-비스(트리클로로메틸)-6-(4-메톡시페닐)-1,3,5-트리아진, 2,4-비스(트리클로로메틸)-6-(4-메톡시나프틸)-1,3,5-트리아진, 2,4-비스(트리클로로메틸)-6-(4-메톡시스티릴)-1,3,5-트리아진, 2,4-비스(트리클로로메틸)-6-[2-(5-메틸퓨란-2-일)에테닐]-1,3,5-트리아진, 2,4-비스(트리클로로메틸)-6-[2-(퓨란-2-일)에테닐]-1,3,5-트리아진, 2,4-비스(트리클로로메틸)-6-[2-(4-디에틸아미노-2-메틸페닐)에테닐]-1,3,5-트리아진, 2,4-비스(트리클로로메틸)-6-[2-(3,4디메톡시페닐)에테닐]-1,3,5-트리아진 등을 들 수 있다.Examples of the triazine-based compound include 2,4-bis(trichloromethyl)-6-(4-methoxyphenyl)-1,3,5-triazine, 2,4-bis(trichloromethyl). )-6-(4-methoxynaphthyl)-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-(4-methoxystyryl)-1,3,5- Triazine, 2,4-bis(trichloromethyl)-6-[2-(5-methylfuran-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloro methyl)-6-[2-(furan-2-yl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(4-diethylamino) -2-methylphenyl)ethenyl]-1,3,5-triazine, 2,4-bis(trichloromethyl)-6-[2-(3,4 dimethoxyphenyl)ethenyl]-1,3, 5-triazine etc. are mentioned.
상기 티오크산톤계 화합물로는, 예를 들면, 2-이소프로필티옥산톤, 4-이소프로필티옥산톤, 2,4-디에틸티옥산톤, 2,4-디클로로티옥산톤, 1-클로로-4-프로폭시티옥산톤 등을 들 수 있다. Examples of the thioxanthone-based compound include 2-isopropylthioxanthone, 4-isopropylthioxanthone, 2,4-diethylthioxanthone, 2,4-dichlorothioxanthone, 1- Chloro-4-propoxythioxanthone etc. are mentioned.
상기 옥심계 화합물로는, 예를 들면, 1-[4-(페닐티오)페닐]-헵탄-1,2-디온 2-(O-벤조일옥심), 1-[4-(페닐티오)페닐]-옥탄-1,2-디온 2-(O-벤조일옥심), 1-[4-(벤조일)페닐]-옥탄-1,2-디온 2-(O-벤조일옥심), 1-[9-에틸-6-(2-메틸벤조일)-9H-카르바졸-3-일]-에타논 1-(O-아세틸옥심), 1-[9-에틸-6-(3-메틸벤조일)-9H-카르바졸-3-일]-에타논 1-(O-아세틸옥심), 1-(9-에틸-6-벤조일-9H-카르바졸-3-일)-에타논 1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸-4-테트라하이드로푸라닐벤조일)-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸-4-테트라하이드로피라닐벤조일)-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸-5-테트라하이드로푸라닐벤조일)-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸-5-테트라하이드로피라닐벤조일)-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-{2-메틸-4-(2,2-디메틸-1,3-디옥소라닐)벤조일}-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸-4-테트라하이드로푸라닐메톡시벤조일)-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸-4-테트라하이드로피라닐메톡시벤조일)-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸-5-테트라하이드로푸라닐메톡시벤조일)-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸벤조일)-9H-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-(2-메틸-5-테트라하이드로피라닐메톡시벤조일)-9.H.-카르바졸-3-일]-1-(O-아세틸옥심), 에타논-1-[9-에틸-6-{2-메틸-4-(2,2-디메틸-1,3-디옥소라닐)메톡시벤조일}-9.H.-카르바졸-3-일]-1-(O-아세틸옥심) 등을 들 수 있다.Examples of the oxime compound include 1-[4-(phenylthio)phenyl]-heptane-1,2-dione 2-(O-benzoyloxime), 1-[4-(phenylthio)phenyl] -octane-1,2-dione 2-(O-benzoyloxime), 1-[4-(benzoyl)phenyl]-octane-1,2-dione 2-(O-benzoyloxime), 1-[9-ethyl -6-(2-methylbenzoyl)-9H-carbazol-3-yl]-ethanone 1-(O-acetyloxime), 1-[9-ethyl-6-(3-methylbenzoyl)-9H-carb bazol-3-yl]-ethanone 1-(O-acetyloxime), 1-(9-ethyl-6-benzoyl-9H-carbazol-3-yl)-ethanone 1-(O-acetyloxime), Ethanone-1-[9-ethyl-6-(2-methyl-4-tetrahydrofuranylbenzoyl)-9.H.-carbazol-3-yl]-1-(O-acetyloxime), ethanone -1-[9-ethyl-6-(2-methyl-4-tetrahydropyranylbenzoyl)-9.H.-carbazol-3-yl]-1-(O-acetyloxime), ethanone-1 -[9-ethyl-6-(2-methyl-5-tetrahydrofuranylbenzoyl)-9.H.-carbazol-3-yl]-1-(O-acetyloxime), ethanone-1-[ 9-ethyl-6-(2-methyl-5-tetrahydropyranylbenzoyl)-9.H.-carbazol-3-yl]-1-(O-acetyloxime), ethanone-1-[9- Ethyl-6-{2-methyl-4-(2,2-dimethyl-1,3-dioxolanyl)benzoyl}-9.H.-carbazol-3-yl]-1-(O-acetyloxime) , ethanone-1-[9-ethyl-6-(2-methyl-4-tetrahydrofuranylmethoxybenzoyl)-9.H.-carbazol-3-yl]-1-(O-acetyloxime), Ethanone-1-[9-ethyl-6-(2-methyl-4-tetrahydropyranylmethoxybenzoyl)-9.H.-carbazol-3-yl]-1-(O-acetyloxime), eta Non-1-[9-ethyl-6-(2-methyl-5-tetrahydrofuranylmethoxybenzoyl)-9.H.-carbazol-3-yl]-1-(O-acetyloxime), ethanone -1-[9-ethyl-6-(2-methylbenzoyl)-9H-carbazol-3-yl]-1-(O-acetyloxime), ethanone-1-[9-ethyl-6-(2) -Methyl-5-tetrahydropyranylmethoxybenzoyl)-9.H.-carbazol-3-yl]-1-(O-acetyloxime), ethanone-1-[9-ethyl-6-{2- Methyl-4-(2,2-dimethyl-1,3-dioxolanyl)methoxybenzoyl}-9.H.-carbazol-3-yl]-1- (O-acetyloxime) etc. are mentioned.
상기 벤조인계 화합물로는, 예를 들면, 벤조인, 벤조인메틸에테르, 벤조인에틸에테르, 벤조인이소프로필에테르, 벤조이소부틸에테르 등을 들 수 있다.As said benzoin type compound, benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, benzo isobutyl ether, etc. are mentioned, for example.
상기 비이미다졸계 화합물로는, 예를 들면, 2,2'-비스(2-클로로페닐)-4,4',5,5'-테트라키스(4-에톡시카르보닐페닐)-1,2'-비이미다졸, 2,2'-비스(2-브로모페닐)-4,4',5,5'-테트라키스(4-에톡시카르보닐페닐)-1,2'-비이미다졸, 2,2'-비스(2-클로로페닐)-4,4',5,5'-테트라페닐-1,2'-비이미다졸, 2,2'-비스(2,4-디클로로페닐)-4,4',5,5'-테트라페닐-1,2'-비이미다졸, 2,2'-비스(2,4,6-트리클로로페닐)-4,4',5,5'-테트라페닐-1,2'-비이미다졸, 2,2'-비스(2-브로모페닐)-4,4',5,5'-테트라페닐-1,2'-비이미다졸, 2,2'-비스(2,4-디브로모페닐)-4,4',5,5'-테트라페닐-1,2'-비이미다졸, 2,2'-비스(2,4,6-트리브로모페닐)-4,4',5,5'-테트라페닐-1,2'-비이미다졸 등을 들 수 있다.Examples of the biimidazole compound include 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetrakis(4-ethoxycarbonylphenyl)-1; 2'-biimidazole, 2,2'-bis(2-bromophenyl)-4,4',5,5'-tetrakis(4-ethoxycarbonylphenyl)-1,2'-biimi Dazole, 2,2'-bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, 2,2'-bis(2,4-dichlorophenyl) )-4,4',5,5'-tetraphenyl-1,2'-biimidazole, 2,2'-bis(2,4,6-trichlorophenyl)-4,4',5,5 '-Tetraphenyl-1,2'-biimidazole, 2,2'-bis(2-bromophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, 2,2'-bis(2,4-dibromophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, 2,2'-bis(2,4, 6-tribromophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole, etc. are mentioned.
상기 광 개시제는, 상기 아크릴계 공중합체 총 중량에 대하여, 0.3 내지 3 중량%로 포함되는 것이 바람직하며, 더욱 바람직하게는, 0.5 내지 2 중량%일 수 있다. 이 경우, 점착제 조성물의 특정 파장 영역, 조도 및 광량의 자와선 처리 시 단량체의 중합 내지 가교 반응을 효과적으로 개시할 수 있고, 내구성이 발현되면서 가변성이 우수할 수 있다.The photoinitiator may be included in an amount of 0.3 to 3 wt%, more preferably, 0.5 to 2 wt%, based on the total weight of the acrylic copolymer. In this case, the polymerization or crosslinking reaction of the monomer may be effectively initiated during treatment with magnetic rays of a specific wavelength region, illuminance, and amount of light of the pressure-sensitive adhesive composition, and durability may be exhibited and variability may be excellent.
열 경화제heat curing agent
본 발명의 점착제 조성물은, 점착제의 응집력을 강화하기 위하여 열 경화제를 더 포함할 수 있다.The pressure-sensitive adhesive composition of the present invention may further include a heat curing agent in order to strengthen the cohesive force of the pressure-sensitive adhesive.
상기 열 경화제는, 상기 아크릴계 공중합체를 적절히 가교함으로써 점착제의 응집력을 강화할 수 있는 성분이라면 특별히 제한되지 않으나, 이소시아네이트계 가교제인 것이 바람직하다.The thermosetting agent is not particularly limited as long as it is a component capable of strengthening the cohesive force of the pressure-sensitive adhesive by appropriately crosslinking the acrylic copolymer, but is preferably an isocyanate-based crosslinking agent.
상기 이소시아네이트계 가교제는, 예를 들어, 톨릴렌디이소시아네이트, 자일렌디이소시아네이트, 헥사메틸렌디이소시아네이트, 2,4-디페닐메탄디이소시아네트, 4,4-디페닐메탄디이소시아네트, 이소포론디이소시아네이트, 테트라메틸자일렌디이소시아네이트, 나프탈렌디이소시아네이트, 2,4-톨루엔 디이소시아네이트 부가형 삼량체 등의 부가형 삼량체 또는 이소시아누레이트 삼량체 등을 들 수 있으나, 이에 한정되는 것은 아니다.The isocyanate-based crosslinking agent is, for example, tolylene diisocyanate, xylene diisocyanate, hexamethylene diisocyanate, 2,4-diphenylmethane diisocyanate, 4,4-diphenylmethane diisocyanate, isophorone diisocyanate, Addition trimers, such as tetramethylxylene diisocyanate, naphthalene diisocyanate, and 2,4-toluene diisocyanate addition trimer, or an isocyanurate trimer, etc. are mentioned, but it is not limited to this.
상기 열 경화제는, 상기 아크릴계 공중합체 총 중량에 대하여, 0.1 내지 1 중량%로 포함되는 것이 바람직하며, 더욱 바람직하게는, 0.1 내지 0.5 중량%일 수 있다. 열 경화제의 함량이 0.1 중량% 미만일 경우, 점착제 조성물의 점착력 또는 응집력이 다소 저하될 수 있으며, 1 중량%를 초과할 경우, 상용성이 다소 저하되어 표면 이행이 일어날 수 있으며, 가교 반응이 너무 진행되어 점착력이 다소 저하될 수 있다.The thermal curing agent, based on the total weight of the acrylic copolymer, preferably included in an amount of 0.1 to 1% by weight, more preferably, may be 0.1 to 0.5% by weight. When the content of the thermal curing agent is less than 0.1% by weight, the adhesive strength or cohesive force of the pressure-sensitive adhesive composition may be somewhat reduced, and if it exceeds 1% by weight, the compatibility may be slightly lowered and surface migration may occur, and the crosslinking reaction may proceed too much As a result, the adhesive strength may be slightly lowered.
나노 입자nanoparticles
본 발명의 점착제 조성물은, 상술한 아크릴계 공중합체를 포함함으로써, 나노 입자를 포함하지 않고도 굴절률을 향상시킬 수 있으나, 굴절률을 더욱 향상시키기 위한 목적 등, 필요에 따라 나노 입자를 더 포함하는 것을 제한하지 않는다.The pressure-sensitive adhesive composition of the present invention, by including the above-described acrylic copolymer, can improve the refractive index without including nanoparticles, but for the purpose of further improving the refractive index, it is not limited to further include nanoparticles as necessary does not
상기 나노 입자는, 고굴절률의 특성을 나타낼 수 있는 것이면 특별히 제한되지 않으며, 종래 또는 이후에 개발되는 나노 입자를 사용할 수 있다.The nanoparticles are not particularly limited as long as they can exhibit characteristics of high refractive index, and nanoparticles developed conventionally or later may be used.
본 발명의 나노 입자는, 일 또는 복수의 실시 형태에 있어서, 산화 티탄, 산화 아연, 산화 지르코늄, 산화 마그네슘, 지르코늄 티탄산염, 규산 지르코늄, 스트론륨 티탄산염, 알류미늄 티탄산염, 실리콘 페라이트, 니켈 페라이트, 코발트 페라이트, 탄산 바륨, 탄화규소, 탄화이트륨, 규산 마그네슘, 황산 아연 및 황산 바륨으로 이루어진 군에서 선택되는 1종 이상을 포함하는 것일 수 있다.The nanoparticles of the present invention, in one or more embodiments, are titanium oxide, zinc oxide, zirconium oxide, magnesium oxide, zirconium titanate, zirconium silicate, strontium titanate, aluminum titanate, silicon ferrite, nickel ferrite. , cobalt ferrite, barium carbonate, silicon carbide, yttrium carbide, magnesium silicate, zinc sulfate, and may include one or more selected from the group consisting of barium sulfate.
상기 나노 입자의 평균 입경은, 고굴절률의 특성을 구현하기 위하여, 1 내지 100nm인 것이 바람직하며, 더욱 바람직하게는, 50 내지 100nm일 수 있다. 나노 입자의 평균 입경이 1nm 미만일 경우, 점착제 조성물 내에 분산이 어려워 광투과율을 저해할 수 있고, 평균 입경이 100nm를 초과할 경우, 입경의 크기로 인해 가시광선의 광투과율을 저해할 수 있다.The average particle diameter of the nanoparticles is preferably 1 to 100 nm, more preferably, 50 to 100 nm, in order to realize the characteristic of high refractive index. When the average particle diameter of the nanoparticles is less than 1 nm, dispersion in the pressure-sensitive adhesive composition may be difficult to inhibit the light transmittance, and if the average particle diameter exceeds 100 nm, the light transmittance of visible light may be inhibited due to the size of the particle size.
상기 나노 입자는, 상기 아크릴계 공중합체 총 중량에 대하여, 0.1 내지 30 중량%로 포함되는 것이 바람직하다. 나노 입자의 함량이 0.1 중량% 미만일 경우, 굴절률 변화율이 미미하여 굴절률이 개선되지 못하고, 30 중량%를 초과할 경우, 조액의 점도가 상승하고, 점착 물성이 저하되어 신뢰성이 불량할 수 있다.The nanoparticles are preferably included in an amount of 0.1 to 30% by weight based on the total weight of the acrylic copolymer. When the content of nanoparticles is less than 0.1% by weight, the refractive index is not improved because the refractive index change is insignificant.
본 발명에 따른 점착제 조성물은, 상술한 구성 요소 이외에도, 본 발명의 목적을 벗어나지 않는 범위 내에서, 필요에 따라 자외선(UV) 차단제, 실란 커플링제, 산화 방지제, 부식 방지제, 소포체, 충전제, 대전 방지제 등의 첨가제를 더 포함할 수 있다.The pressure-sensitive adhesive composition according to the present invention, in addition to the above-described components, within the scope not departing from the object of the present invention, if necessary, ultraviolet (UV) blocker, silane coupling agent, antioxidant, corrosion inhibitor, defoamer, filler, antistatic agent It may further include additives such as.
<점착 시트, 광학 부재 및 표시 장치><Adhesive sheet, optical member and display device>
본 발명의 일 실시 형태는, 전술한 점착제 조성물의 경화물을 포함하는 점착 시트에 관한 것이다.One embodiment of the present invention relates to a pressure-sensitive adhesive sheet comprising a cured product of the above-described pressure-sensitive adhesive composition.
상기 점착 시트는, 기재 필름 및 상기 기재 필름의 적어도 일면 상에 적층된 점착제층을 포함할 수 있다. 예를 들어, 기재 필름 상에 본 발명에 따른 점착제 조성물로부터 점착제층이 형성된 것이거나, 2 매의 기재 필름 사이에 본 발명에 따른 점착제 조성물로부터 형성된 점착제층이 개재된 것일 수 있다.The pressure-sensitive adhesive sheet may include a base film and an adhesive layer laminated on at least one surface of the base film. For example, the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition according to the present invention on the base film, or the pressure-sensitive adhesive layer formed from the pressure-sensitive adhesive composition according to the present invention between two base films may be interposed.
상기 기재 필름은, 당 업계에서 사용되는 기재라면 특별한 제한 없이 사용될 수 있으며, 투명성, 기계적 강도, 열안정성, 수분차폐성, 등방성 등이 우수한 필름이 바람직하다. 일 또는 복수의 실시 형태에 있어서, 상기 기재 필름은, 폴리에틸렌테레프탈레이트, 폴리에틸렌이소프탈레이트, 폴리에틸렌나프탈레이트, 폴리부틸렌테레프탈레이트 등의 폴리에스테르계 수지; 디아세틸셀룰로오스, 트리아세틸셀룰로오스 등의 셀룰로오스계 수지; 폴리카보네이트계 수지; 폴리메틸(메타)아크릴레이트, 폴리에틸(메타)아크릴레이트 등의 아크릴계 수지; 폴리스티렌, 아크릴로니트릴-스티렌 공중합체 등의 스티렌계 수지; 폴리에틸렌, 폴리프로필렌, 시클로계 또는 노보넨 구조를 갖는 폴리올레핀, 에틸렌-프로필렌 공중합체 등의 폴리올레핀계 수지; 염화비닐계 수지; 나일론, 방향족 폴리아미드 등의 아미드계 수지; 이미드계 수지; 술폰계 수지; 폴리에테르술폰계 수지; 폴리에테르에테르케톤계 수지; 황화 폴리페닐렌계 수지; 비닐알콜계 수지; 염화비닐리덴계 수지; 비닐부티랄계 수지; 알릴레이트계 수지; 폴리옥시메틸렌계 수지; 에폭시계 수지 등과 같은 열가소성 수지로 구성된 필름을 들 수 있으며, 상기 열가소성 수지의 블렌드물로 구성된 필름도 사용할 수 있다. 또한, (메타)아크릴계, 우레탄계, 아크릴우레탄계, 에폭시계, 실리콘계 등의 열경화성 수지 또는 자외선 경화형 수지로 된 필름을 이용할 수도 있으며, 본 발명의 실시형태에 따르면, 반복적인 굽힘에 대한 내구성이 우수하여 플렉서블한 화상표시장치에 적용이 보다 용이하도록 폴리이미드계 수지를 사용할 수 있다.The base film may be used without any particular limitation as long as it is a base material used in the art, and a film having excellent transparency, mechanical strength, thermal stability, moisture shielding property, isotropy, and the like is preferable. In one or some embodiment, the said base film is polyester-type resin, such as a polyethylene terephthalate, a polyethylene isophthalate, a polyethylene naphthalate, and a polybutylene terephthalate; Cellulose resins, such as a diacetyl cellulose and a triacetyl cellulose; polycarbonate-based resin; acrylic resins such as polymethyl (meth)acrylate and polyethyl (meth)acrylate; styrenic resins such as polystyrene and acrylonitrile-styrene copolymer; polyolefin-based resins such as polyethylene, polypropylene, polyolefin having a cyclo-based or norbornene structure, and an ethylene-propylene copolymer; vinyl chloride-based resin; amide-based resins such as nylon and aromatic polyamide; imide-based resin; sulfone-based resins; polyether sulfone-based resin; polyether ether ketone resin; sulfide polyphenylene-based resin; vinyl alcohol-based resin; vinylidene chloride-based resin; vinyl butyral-based resin; allylate-based resin; polyoxymethylene-based resins; and a film composed of a thermoplastic resin such as an epoxy-based resin, and a film composed of a blend of the above-mentioned thermoplastic resins can also be used. In addition, a film made of a thermosetting resin or ultraviolet curable resin such as (meth)acrylic, urethane, acrylic urethane, epoxy, or silicone may be used. A polyimide-based resin may be used for easier application to an image display device.
일부 실시 형태에 있어서, 상기 점착 시트는, 기재 필름의 일면에 점착제층이 적층되고, 상기 점착제층이 적층되지 않은 기재 필름의 타면에 하드코팅층이 형성될 수 있다. 필요에 따라, 상기 점착제층의 일면에는 세퍼레이터가 형성될 수 있다.In some embodiments, the pressure-sensitive adhesive sheet may have a pressure-sensitive adhesive layer laminated on one surface of the base film, and a hard coating layer may be formed on the other surface of the base film on which the pressure-sensitive adhesive layer is not laminated. If necessary, a separator may be formed on one surface of the pressure-sensitive adhesive layer.
상기 점착 시트의 제조 방법은, 특별히 한정되는 것은 아니나, 예를 들면, 상술한 점착제 조성물을 40℃ 부근의 온도에서 기재 필름의 한쪽 면 또는 양면에 도포해서 점착제층을 형성하고, 상기 점착제층을 광경화를 통해 경화시켜 제조할 수 있다. 일 실시 형태에 있어서, 상기 점착제 조성물을 실리콘이나 불소 등으로 표면이형 처리를 실시한 기재 필름의 표면에 도포하고 가열 건조해서 점착제층을 형성할 수도 있다. The method for producing the pressure-sensitive adhesive sheet is not particularly limited, but for example, the pressure-sensitive adhesive composition described above is applied to one or both surfaces of a base film at a temperature of around 40° C. to form a pressure-sensitive adhesive layer, and the pressure-sensitive adhesive layer is photo-applied It can be prepared by hardening through heating. In one embodiment, the pressure-sensitive adhesive composition may be applied to the surface of a base film subjected to a surface release treatment with silicone, fluorine, or the like, and dried by heating to form a pressure-sensitive adhesive layer.
필요에 따라, 점착제층에 대한 밀착성을 향상시키기 위해, 상기 기재 필름의 표면에 코로나 방전 처리, 플라즈마 처리, 블라스트 처리, 케미컬 에칭 처리, 프라이머 처리 등을 실시할 수도 있다. If necessary, corona discharge treatment, plasma treatment, blast treatment, chemical etching treatment, primer treatment, etc. may be performed on the surface of the base film in order to improve the adhesion to the pressure-sensitive adhesive layer.
상기 도포는 일반적으로 나이프 코터, 롤 코터, 캘린더 코터, 콤마 코터 등에 의해 수행할 수 있다. 또한, 도포 두께나 상기 점착제 조성물의 점도에 따라서는 그라비어 코터, 로드 코터 등에 의해 수행할 수도 있다. 상기 점착제층의 두께는 예를 들어, 5 내지 80㎛로 형성할 수 있다. 상기 점착제층의 두께가 상기 범위이면 점착력이 우수하고, 광투과성, 신뢰성 및 단차 흡수성 등의 측면에서 이점이 있다.The application may be generally performed by a knife coater, a roll coater, a calender coater, a comma coater, or the like. In addition, it may be carried out by a gravure coater, a rod coater, etc. depending on the coating thickness or the viscosity of the pressure-sensitive adhesive composition. The thickness of the pressure-sensitive adhesive layer may be, for example, 5 to 80㎛. When the thickness of the pressure-sensitive adhesive layer is within the above range, the adhesive strength is excellent, and there are advantages in terms of light transmittance, reliability and step absorption.
상기 점착 시트는, 굴절률이 1.58 이상인 것일 수 있으며, 더욱 바람직하게는 1.58 내지 1.70일 수 있고, 가장 바람직하게는, 1.60 내지 1.70일 수 있다. 이 경우, 터치 패널을 포함하는 표시 장치에서 별도의 고굴절 패턴층을 포함하지 않고도 시인성이 개선되는 것일 수 있다. 특히, 상기 본 발명에 따른 점착 시트의 경우, 과량의 나노 입자를 포함하지 않고도 고굴절률을 나타낼 수 있어, 광학 특성의 측면에서 이점이 있다.The pressure-sensitive adhesive sheet may have a refractive index of 1.58 or more, more preferably 1.58 to 1.70, and most preferably, 1.60 to 1.70. In this case, visibility may be improved without including a separate high refractive index pattern layer in the display device including the touch panel. In particular, in the case of the pressure-sensitive adhesive sheet according to the present invention, it can exhibit a high refractive index without including an excessive amount of nanoparticles, there is an advantage in terms of optical properties.
본 발명의 일 실시 형태는, 전술한 점착 시트 내지 점착제층을 포함하는 광학부재에 관한 것이다. 구체적으로 상기 점착 시트 내지 점착제층은 광학용 점착 필름(OCA)일 수 있다.One embodiment of the present invention relates to an optical member including the above-described pressure-sensitive adhesive sheet or pressure-sensitive adhesive layer. Specifically, the pressure-sensitive adhesive sheet or the pressure-sensitive adhesive layer may be an optical pressure-sensitive adhesive film (OCA).
상기 광학 부재는 예컨대, 터치패널, 윈도우, 편광판, 컬라필터, 위상차 필름, 타원 편광필름, 반사필름, 반사방지 필름, 보상필름, 휘도 향상필름, 배향막, 광확산 필름, 유리비산 방지 필름, 표면 보호필름, 플라스틱 LCD 기판, ITO(indium tin oxide), FTO(fluorinated tin oxide), AZO(aluminum dopped zinc oxide), CNT(carbon nanotube), Ag 나노와이어(nanowire), 그래핀(graphene) 등의 투명 전극 필름 등을 들 수 있다. The optical member is, for example, a touch panel, a window, a polarizing plate, a color filter, a retardation film, an elliptically polarizing film, a reflective film, an anti-reflection film, a compensation film, a brightness enhancing film, an alignment film, a light diffusion film, a glass scattering prevention film, surface protection Transparent electrode such as film, plastic LCD substrate, indium tin oxide (ITO), fluorinated tin oxide (FTO), aluminum dopped zinc oxide (AZO), carbon nanotube (CNT), Ag nanowire, graphene, etc. A film etc. are mentioned.
상기 광학 부재의 제조방법은 본 발명이 속하는 분야의 통상의 지식을 가진 자에 의해 용이하게 제조될 수 있다. The method of manufacturing the optical member may be easily manufactured by a person skilled in the art to which the present invention pertains.
본 발명의 일 실시 형태는, 전술한 광학부재를 포함하는 표시장치에 관한 것이다. 상기 표시장치는 전술한 점착 시트 내지 점착제층을 포함하는 광학부재를 포함하는 것이라면 이에 한정되지 않으며, 예를 들면, 액정 표시 장치(Liquid Crystal Display; LCD), 전계 발광(Electro Luminescent; EL) 표시 장치, 플라즈마 표시장치(Plasma Display Panel; PDP), 전계 방출 표시 장치(Field Emission Display; FED), 유기발광소자(Organic Light Emitting Diode; OLED) 표시장치 등이 있을 수 있다.One embodiment of the present invention relates to a display device including the above-described optical member. The display device is not limited thereto, as long as it includes an optical member including the above-described pressure-sensitive adhesive sheet or pressure-sensitive adhesive layer, and for example, a liquid crystal display (LCD), an electroluminescent (EL) display device. , a plasma display panel (PDP), a field emission display (FED), an organic light emitting diode (OLED) display, and the like.
상기 표시 장치는, 전술한 광학 부재를 포함하는 것을 제외하고는, 당해 기술 분야에서 통상적으로 알려진 구성을 포함하는 것일 수 있다.The display device may include a configuration commonly known in the art, except for including the above-described optical member.
이하, 본 발명을 실시 예에 기초하여 더욱 상세하게 설명하지만, 하기에 개시되는 본 발명의 실시 형태는 어디까지 예시로써, 본 발명의 범위는 이들의 실시 형태에 한정되지 않는다. 본 발명의 범위는 특허청구범위에 표시되었고, 더욱이 특허 청구범위 기록과 균등한 의미 및 범위 내에서의 모든 변경을 함유하고 있다. 또한, 이하의 실시 예, 비교 예에서 함유량을 나타내는 "%" 및 "부"는 특별히 언급하지 않는 한 질량 기준이다.Hereinafter, the present invention will be described in more detail based on examples, but the embodiments of the present invention disclosed below are merely illustrative, and the scope of the present invention is not limited to these embodiments. The scope of the present invention is indicated in the claims, and furthermore includes all modifications within the meaning and scope equivalent to those recorded in the claims. In addition, in the following examples and comparative examples, "%" and "part" indicating the content are based on mass unless otherwise specified.
<실시예 및 비교예><Examples and Comparative Examples>
실시예 1Example 1
질소가스가 환류되고 온도 조절이 용이하도록 냉각장치가 설치된 1L의 반응기에 펜타브로모페닐아크릴레이트 40 중량부, 2-에틸헥실아크릴레이트 15 중량부, 노닐페놀(에틸렌옥사이드 4몰 변성)아크릴레이트 40 중량부 및 2-히드록시에틸아크릴레이트 5 중량부로 이루어진 단량체 혼합물을 투입한 후, 용매로 메틸에틸케톤 300 중량부를 투입하였다. 그 후, 산소를 제거하기 위하여 질소가스를 1시간 동안 투입하여 치환시킨 후, 온도를 70℃로 유지하였다. 단량체 혼합물을 균일하게 교반한 후, 반응 개시제로 아조비스이소부티로니트릴(AIBN) 0.07 중량부를 투입하고, 8시간 동안 반응시켜 중량평균분자량이 153만인 아크릴계 공중합체를 제조하였고, 추가로 이소시아네이트계 가교제(AK75)를 0.5 중량부 추가하여 점착제 조성물을 제조하였다. 상기 점착제 조성물을 두께 75㎛의 코팅액 이형 처리된 폴리에틸렌테레프탈레이트(PET) 필름에 바코터를 이용하여 코팅하였다. 이후, 100℃에서 1분간 건조 후, 상온에서 7일 간 양생하여 점착제층의 두께가 25㎛인 점착 시트를 제조하였다.40 parts by weight of pentabromophenyl acrylate, 15 parts by weight of 2-ethylhexyl acrylate, 40 parts by weight of nonylphenol (modified by 4 moles of ethylene oxide) acrylate in a 1L reactor in which nitrogen gas is refluxed and a cooling device is installed for easy temperature control After adding a monomer mixture consisting of parts by weight and 5 parts by weight of 2-hydroxyethyl acrylate, 300 parts by weight of methyl ethyl ketone as a solvent was added. Thereafter, nitrogen gas was added for 1 hour to remove oxygen and replaced, and then the temperature was maintained at 70°C. After uniformly stirring the monomer mixture, 0.07 parts by weight of azobisisobutyronitrile (AIBN) as a reaction initiator was added and reacted for 8 hours to prepare an acrylic copolymer having a weight average molecular weight of 1.53 million, and additionally an isocyanate-based crosslinking agent (AK75) was added in 0.5 parts by weight to prepare a pressure-sensitive adhesive composition. The pressure-sensitive adhesive composition was coated on a polyethylene terephthalate (PET) film having a thickness of 75 μm and subjected to a release treatment using a bar coater. Thereafter, after drying at 100° C. for 1 minute, and curing at room temperature for 7 days, a pressure-sensitive adhesive sheet having a thickness of the pressure-sensitive adhesive layer of 25 μm was prepared.
실시예 2Example 2
하기 표 1에 나타낸 바와 같은 성분 및 함량으로 실시예 1과 동일하게 실시예 2의 점착제 조성물을 이용한 점착 시트를 제조하였다.A pressure-sensitive adhesive sheet using the pressure-sensitive adhesive composition of Example 2 was prepared in the same manner as in Example 1 with the components and contents shown in Table 1 below.
실시예 3Example 3
2-(나프탈렌-2-일티오)에틸아크릴레이트 60 중량부, 2-에틸헥실디글리콜아크릴레이트 35 중량부, 2-아크릴로일옥시에틸2-히드록시에틸프탈레이트 5 중량부 및 (1-히드록시시클로헥실)페닐케톤 (Irgacure®-184) 0.5 중량부를 포함하는 점착제 조성물을 준비하고, 상기 점착제 조성물의 유리전이온도를 측정한 결과, -13℃였다(측정 기기: DSC8000, PerkinElmer Inc.). 상기 점착제 조성물을 두께 75㎛의 코팅액 이형 처리된 폴리에틸렌테레프탈레이트(PET) 필름에 바코터를 이용하여 코팅하였다. 이후, UV램프를 이용하여 자외선을 10분 동안 조사하여 경화시킴으로써, 점착제층의 두께가 25㎛인 점착 시트를 제조하였다.2-(naphthalen-2-ylthio)ethyl acrylate 60 parts by weight, 2-ethylhexyldiglycol acrylate 35 parts by weight, 2-acryloyloxyethyl 2-hydroxyethyl phthalate 5 parts by weight and (1-hydroxyl A pressure-sensitive adhesive composition containing 0.5 parts by weight of oxycyclohexyl)phenylketone (Irgacure ® -184) was prepared, and the glass transition temperature of the pressure-sensitive adhesive composition was measured, and as a result, it was -13°C (measurement instrument: DSC8000, PerkinElmer Inc.). The pressure-sensitive adhesive composition was coated on a polyethylene terephthalate (PET) film having a thickness of 75 μm and subjected to a release treatment using a bar coater. Thereafter, by irradiating ultraviolet rays for 10 minutes using a UV lamp to cure, a pressure-sensitive adhesive sheet having a thickness of the pressure-sensitive adhesive layer of 25 μm was prepared.
실시예 4, 5 및 비교예 1 내지 4Examples 4 and 5 and Comparative Examples 1 to 4
하기 표 1에 나타낸 바와 같은 성분 및 함량으로 실시예 3과 동일하게 실시예 4, 5 및 비교예 1 내지 4의 점착제 조성물을 이용한 점착 시트를 제조하였다.Adhesive sheets using the pressure-sensitive adhesive compositions of Examples 4 and 5 and Comparative Examples 1 to 4 were prepared in the same manner as in Example 3 with the components and contents shown in Table 1 below.
단량체high refractive index
monomer
단량체acryl
monomer
단량체polymeric
monomer
A2 : 2-(나프탈렌-2-일티오)에틸아크릴레이트(동종중합체 굴절률: 1.62, Tg: 77℃대림화학 社)
A3 : 2-(나프탈렌-2-일옥시)에틸아크릴레이트(동종중합체 굴절률: 1.589, Tg: 74℃대림화학 社)
A4 : 1-에톡시레이티드-o-페닐페놀아크릴레이트(동종중합체 굴절률: 1.577, Tg: 27℃대림화학 社)
A5 : 페녹시벤질아크릴레이트(동종중합체 굴절률: 1.565, Tg: 22℃대림화학 社)
A6 : 1-에톡시레이티드페놀아크릴레이트(동종중합체 굴절률: 1.516, Tg: -22℃대림화학 社)
B1 : 2-에틸헥실아크릴레이트(동종중합체 굴절률: 1.466, Tg: -74℃ 社)
B2 : 2-에틸헥실디글리콜아크릴레이트(동종중합체 굴절률: 1.444, Tg: -90℃공영사)
B3 : 노닐페놀(에틸렌옥사이드 4몰 변성)아크릴레이트(동종중합체 굴절률: 1.495, Tg: -70℃공영사)
C1 : 2-히드록시에틸아크릴레이트(동종중합체 굴절률: 1.448, Tg: -15℃공영사)
C2 : 2-아크릴로일옥시에틸2-히드록시에틸프탈레이트(동종중합체 굴절률: 1.523, Tg: -12℃공영사)
C3 : 아크릴산
D1 : 산화 지르코늄(ZrO2)(굴절률: 2.13, 평균 입경: 80nm)
E1 : (1-히드록시시클로헥실)페닐케톤(Irgacure®-184)
F1 : 이소시아네이트계 가교제(AK75)(애경화학 社)A1: pentabromophenyl acrylate (homopolymer refractive index: 1.67, Tg: 155℃ Sigma-Aldrich)
A2: 2-(naphthalen-2-ylthio)ethyl acrylate (homopolymer refractive index: 1.62, Tg: 77℃ Daelim Chemical)
A3: 2-(naphthalen-2-yloxy)ethyl acrylate (homopolymer refractive index: 1.589, Tg: 74℃ Daelim Chemical)
A4: 1-ethoxylated-o-phenylphenol acrylate (homopolymer refractive index: 1.577, Tg: 27℃ Daelim Chemical)
A5: phenoxybenzyl acrylate (homopolymer refractive index: 1.565, Tg: 22℃ Daelim Chemical)
A6: 1-ethoxylated phenol acrylate (homopolymer refractive index: 1.516, Tg: -22℃ Daelim Chemical)
B1: 2-ethylhexyl acrylate (homopolymer refractive index: 1.466, Tg: -74 ℃ company)
B2: 2-ethylhexyldiglycol acrylate (homopolymer refractive index: 1.444, Tg: -90°C co-projection company)
B3: Nonylphenol (modified by 4 moles of ethylene oxide) acrylate (homopolymer refractive index: 1.495, Tg: -70°C co-projection company)
C1: 2-hydroxyethyl acrylate (homopolymer refractive index: 1.448, Tg: -15°C co-projection)
C2: 2-acryloyloxyethyl 2-hydroxyethyl phthalate (homopolymer refractive index: 1.523, Tg: -12°C co-projection)
C3: acrylic acid
D1: zirconium oxide (ZrO 2 ) (refractive index: 2.13, average particle diameter: 80 nm)
E1: (1-hydroxycyclohexyl) phenyl ketone (Irgacure ® -184)
F1: Isocyanate-based crosslinking agent (AK75) (Aekyung Chemical)
<실험예><Experimental example>
(1) 투명성 평가(1) Transparency evaluation
상기 실시예 및 비교예에 따른 점착제층을, 이형 필름으로부터 박리하고, 슬라이드 유리(마쯔나미 가라스 고교 제, 모델 넘버: S1111)에 접합하여, 25℃의 분위기하에서, (주)무라카미시키사이기쥬쯔 겐큐쇼샤제의 “반사·투과율계 HR-100형”을 사용하여, JISK-7136에 준하여 헤이즈값(%)을 측정했다. 당해 값에서 슬라이드 유리의 헤이즈값(0.2%)을 뺀 값을, 점착제층의 헤이즈값으로 평가하여, 해당 평가 결과를 하기 표 2에 나타내었다.The pressure-sensitive adhesive layers according to the above examples and comparative examples were peeled off from the release film, bonded to a slide glass (manufactured by Matsunami Glass Kogyo, model number: S1111), and under an atmosphere of 25° C., Murakami Shiki Co., Ltd. The haze value (%) was measured according to JISK-7136 using the "Reflectance/Transmittance Meter HR-100 Type" manufactured by Jutsu Corporation. The value obtained by subtracting the haze value (0.2%) of the slide glass from the value was evaluated as the haze value of the pressure-sensitive adhesive layer, and the evaluation results are shown in Table 2 below.
<투명성 평가 기준><Transparency evaluation criteria>
○ : 헤이즈 값이 2% 미만○: haze value less than 2%
X : 헤이즈 값이 2% 이상X: Haze value is 2% or more
(2) 굴절률 평가(2) Refractive index evaluation
상기 실시예 및 비교예에 따른 점착제층에 대하여, 25℃의 분위기에서 나트륨 D선을 조사하여, 아베 굴절률계(ATAGO사제, DMM4)로 굴절률을 측정하여, 해당 측정 결과를 하기 표 2에 나타내었다.For the pressure-sensitive adhesive layers according to the Examples and Comparative Examples, sodium D-line was irradiated in an atmosphere of 25° C., and the refractive index was measured with an Abbe refractometer (manufactured by ATAGO, DMM4), and the measurement results are shown in Table 2 below. .
<굴절률 평가 기준><Refractive Index Evaluation Criteria>
◎ : 굴절률 1.60 이상◎: refractive index 1.60 or more
○ : 굴절률 1.58 이상 1.60 미만○: refractive index 1.58 or more and less than 1.60
X : 굴절률 1.58 미만X: refractive index less than 1.58
상기 표 2의 내용을 참조하면, 실시예 1 내지 5의 점착제 조성물에 의해 제조된 점착제층은, 우수한 투명성과 1.58 이상의 고굴절률을 나타낸다.Referring to the contents of Table 2, the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition of Examples 1 to 5 shows excellent transparency and a high refractive index of 1.58 or more.
한편, 비교예 1 내지 3의 점착제 조성물에 의해 제조된 점착제층은, 굴절률이 실시예 대비 불량하며, 비교예 4의 점착제 조성물에 의해 제조된 점착제층은, 투명성이 실시예 대비 불량함을 알 수 있다.On the other hand, it can be seen that the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition of Comparative Examples 1 to 3 has a poorer refractive index compared to the Example, and the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition of Comparative Example 4 has poor transparency compared to the Example. have.
따라서, 본 발명에 따른 점착제 조성물은, 우수한 광학 특성과 신뢰성을 나타내면서도 터치 패널을 포함하는 표시 장치에서 별도의 고굴절 패턴층을 포함하지 않고도 시인성을 개선시킬 수 있는 점착제층의 제조에 특히 적합한 것임을 알 수 있다.Therefore, it can be seen that the pressure-sensitive adhesive composition according to the present invention is particularly suitable for manufacturing a pressure-sensitive adhesive layer capable of improving visibility without including a separate high refractive index pattern layer in a display device including a touch panel while exhibiting excellent optical properties and reliability. can
Claims (17)
A pressure-sensitive adhesive composition comprising an acrylic copolymer having a refractive index of 1.55 to 1.70.
The pressure-sensitive adhesive composition of claim 1, wherein the acrylic copolymer includes a repeating unit derived from a high refractive acrylic monomer having a refractive index of 1.58 or more of the homopolymer.
The method according to claim 2, The refractive index of the homopolymer of the high refractive acrylic monomer is 1.58 or more, pentabromophenyl (meth) acrylate, 2- (naphthalen-2-yloxy) ethyl (meth) acrylate, 2- (naphthalene- A pressure-sensitive adhesive composition comprising at least one selected from the group consisting of 2-ylthio)ethyl (meth)acrylate, biphenylmethyl (meth)acrylate, and 1-pyrenemethyl (meth)acrylate.
The pressure-sensitive adhesive composition of claim 2, wherein the high refractive acrylic monomer having a refractive index of 1.58 or more of the homopolymer is included in an amount of 10 to 70% by weight based on the total weight of the acrylic copolymer.
The adhesive according to claim 2, wherein the acrylic copolymer further comprises at least one of a repeating unit derived from an acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms and a repeating unit derived from a polymerizable monomer having a crosslinkable functional group. composition.
The method according to claim 5, wherein the acrylic monomer having a hydrocarbon group having 1 to 20 carbon atoms, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, n -Butyl (meth)acrylate, sec-butyl (meth)acrylate, t-butyl (meth)acrylate, isobutyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, 2- Ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, isobornyl acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate, n-decyl (meth) acrylate, isodecyl (meth) acrylate, n-dodecyl (meth) acrylate, n-tridecyl (meth) acrylate, n-tetradecyl (meth) acrylate, pentafluorooctyl acrylate , 2-ethylhexyldiglycol acrylate, nonylphenol (4-mol-modified ethylene oxide) acrylate and 6-(1-naphthyloxy)-1-hexyl acrylate containing at least one selected from the group consisting of, Adhesive composition.
The method according to claim 5, wherein the polymerizable monomer having a crosslinkable functional group is a sulfonic acid group-containing monomer, a phosphoric acid group-containing monomer, a cyano group-containing monomer, a vinyl ester monomer, an aromatic vinyl monomer, a carboxyl group-containing monomer, an acid anhydride group-containing monomer, a hydroxyl group-containing monomer A pressure-sensitive adhesive composition comprising at least one selected from the group consisting of a monomer, an amide group-containing monomer, an amino group-containing monomer, an imide group-containing monomer, an epoxy group-containing monomer, and an ether group-containing monomer.
The pressure-sensitive adhesive composition of claim 1, wherein the pressure-sensitive adhesive composition further comprises at least one of a photoinitiator, a thermal curing agent, and nanoparticles.
The pressure-sensitive adhesive composition of claim 8, wherein the thermal curing agent includes an isocyanate-based crosslinking agent.
The method according to claim 8, wherein the nanoparticles are titanium oxide, zinc oxide, zirconium oxide, magnesium oxide, zirconium titanate, zirconium silicate, strontium titanate, aluminum titanate, silicon ferrite, nickel ferrite, cobalt ferrite, barium carbonate , Silicon carbide, yttrium carbide, magnesium silicate, zinc sulfate, and containing at least one selected from the group consisting of barium sulfate, the pressure-sensitive adhesive composition.
The pressure-sensitive adhesive composition of claim 1, wherein the pressure-sensitive adhesive composition has a glass transition temperature (Tg) of -10°C or less.
The pressure-sensitive adhesive composition according to claim 1, wherein a refractive index of the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition is 1.58 or more.
The method according to claim 1, Haze of the pressure-sensitive adhesive layer prepared by the pressure-sensitive adhesive composition is less than 2%, the pressure-sensitive adhesive composition.
A pressure-sensitive adhesive sheet prepared by using the pressure-sensitive adhesive composition of any one of claims 1 to 13.
The pressure-sensitive adhesive sheet according to claim 14, wherein the pressure-sensitive adhesive sheet has a refractive index of 1.58 or more.
An optical member comprising a pressure-sensitive adhesive layer formed of the pressure-sensitive adhesive composition of any one of claims 1 to 13.
A display device comprising the optical member of claim 16 .
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| CN202280021744.4A CN116997629A (en) | 2021-03-16 | 2022-03-03 | Adhesive composition, adhesive sheet produced using same, optical member, and display device |
| PCT/KR2022/003047 WO2022196987A1 (en) | 2021-03-16 | 2022-03-03 | Adhesive composition, and adhesive sheet, optical member, and display apparatus produced using same |
| JP2023556517A JP2024510228A (en) | 2021-03-16 | 2022-03-03 | Adhesive composition, adhesive sheet manufactured using the same, optical member, and display device |
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| KR20080069355A (en) * | 2007-01-23 | 2008-07-28 | 주식회사 엘지화학 | Optically compensated acrylic pressure-sensitive adhesive composition, polarizing plate and liquid crystal display device containing the same |
| KR20100139014A (en) * | 2008-03-31 | 2010-12-31 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Adhesive layer for multilayer optical film |
| KR20140147419A (en) * | 2013-06-19 | 2014-12-30 | 주식회사 엘지화학 | Adhesive film and preparation method of adhesive film using electric field |
| KR20160045199A (en) | 2014-10-16 | 2016-04-27 | 도레이첨단소재 주식회사 | Adhesive Film Having High Refractive Index For Touch Screen Panel |
| KR20200135194A (en) * | 2019-05-22 | 2020-12-02 | 닛토덴코 가부시키가이샤 | Adhesive sheet |
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| US5310835A (en) * | 1993-09-30 | 1994-05-10 | National Starch And Chemical Investment Holding Corporation | Transparent two-part acrylic adhesive composition and the method of use thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080069355A (en) * | 2007-01-23 | 2008-07-28 | 주식회사 엘지화학 | Optically compensated acrylic pressure-sensitive adhesive composition, polarizing plate and liquid crystal display device containing the same |
| KR20100139014A (en) * | 2008-03-31 | 2010-12-31 | 쓰리엠 이노베이티브 프로퍼티즈 컴파니 | Adhesive layer for multilayer optical film |
| KR20140147419A (en) * | 2013-06-19 | 2014-12-30 | 주식회사 엘지화학 | Adhesive film and preparation method of adhesive film using electric field |
| KR20160045199A (en) | 2014-10-16 | 2016-04-27 | 도레이첨단소재 주식회사 | Adhesive Film Having High Refractive Index For Touch Screen Panel |
| KR20200135194A (en) * | 2019-05-22 | 2020-12-02 | 닛토덴코 가부시키가이샤 | Adhesive sheet |
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