WO2017145959A1 - 表示素子シール剤、液晶シール剤及びその硬化物、並びに液晶表示パネル及びその製造方法 - Google Patents
表示素子シール剤、液晶シール剤及びその硬化物、並びに液晶表示パネル及びその製造方法 Download PDFInfo
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- WO2017145959A1 WO2017145959A1 PCT/JP2017/006027 JP2017006027W WO2017145959A1 WO 2017145959 A1 WO2017145959 A1 WO 2017145959A1 JP 2017006027 W JP2017006027 W JP 2017006027W WO 2017145959 A1 WO2017145959 A1 WO 2017145959A1
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- ZCDADJXRUCOCJE-UHFFFAOYSA-N 2-chlorothioxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(Cl)=CC=C3SC2=C1 ZCDADJXRUCOCJE-UHFFFAOYSA-N 0.000 description 1
- SJEBAWHUJDUKQK-UHFFFAOYSA-N 2-ethylanthraquinone Chemical compound C1=CC=C2C(=O)C3=CC(CC)=CC=C3C(=O)C2=C1 SJEBAWHUJDUKQK-UHFFFAOYSA-N 0.000 description 1
- QPXVRLXJHPTCPW-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-(4-propan-2-ylphenyl)propan-1-one Chemical compound CC(C)C1=CC=C(C(=O)C(C)(C)O)C=C1 QPXVRLXJHPTCPW-UHFFFAOYSA-N 0.000 description 1
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 1
- BMTMWCVGAVWDRA-UHFFFAOYSA-N 2-hydroxymethylanthraquinone Natural products O=C1C2=CC=CC=C2C(=O)C2=C1C=CC=C2CO BMTMWCVGAVWDRA-UHFFFAOYSA-N 0.000 description 1
- LWRBVKNFOYUCNP-UHFFFAOYSA-N 2-methyl-1-(4-methylsulfanylphenyl)-2-morpholin-4-ylpropan-1-one Chemical compound C1=CC(SC)=CC=C1C(=O)C(C)(C)N1CCOCC1 LWRBVKNFOYUCNP-UHFFFAOYSA-N 0.000 description 1
- ZCUJYXPAKHMBAZ-UHFFFAOYSA-N 2-phenyl-1h-imidazole Chemical compound C1=CNC(C=2C=CC=CC=2)=N1 ZCUJYXPAKHMBAZ-UHFFFAOYSA-N 0.000 description 1
- GYGYLGPQOCOYHH-UHFFFAOYSA-N 2-propan-2-ylxanthen-9-one Chemical compound C1=CC=C2C(=O)C3=CC(C(C)C)=CC=C3OC2=C1 GYGYLGPQOCOYHH-UHFFFAOYSA-N 0.000 description 1
- YTPSFXZMJKMUJE-UHFFFAOYSA-N 2-tert-butylanthracene-9,10-dione Chemical compound C1=CC=C2C(=O)C3=CC(C(C)(C)C)=CC=C3C(=O)C2=C1 YTPSFXZMJKMUJE-UHFFFAOYSA-N 0.000 description 1
- OKISUZLXOYGIFP-UHFFFAOYSA-N 4,4'-dichlorobenzophenone Chemical compound C1=CC(Cl)=CC=C1C(=O)C1=CC=C(Cl)C=C1 OKISUZLXOYGIFP-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- WOCGGVRGNIEDSZ-UHFFFAOYSA-N 4-[2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical compound C=1C=C(O)C(CC=C)=CC=1C(C)(C)C1=CC=C(O)C(CC=C)=C1 WOCGGVRGNIEDSZ-UHFFFAOYSA-N 0.000 description 1
- IKVYHNPVKUNCJM-UHFFFAOYSA-N 4-propan-2-ylthioxanthen-9-one Chemical compound S1C2=CC=CC=C2C(=O)C2=C1C(C(C)C)=CC=C2 IKVYHNPVKUNCJM-UHFFFAOYSA-N 0.000 description 1
- 239000005995 Aluminium silicate Substances 0.000 description 1
- 238000004438 BET method Methods 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- BWPYBAJTDILQPY-UHFFFAOYSA-N Methoxyphenone Chemical compound C1=C(C)C(OC)=CC=C1C(=O)C1=CC=CC(C)=C1 BWPYBAJTDILQPY-UHFFFAOYSA-N 0.000 description 1
- 239000004695 Polyether sulfone Substances 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 1
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 description 1
- ULQMPOIOSDXIGC-UHFFFAOYSA-N [2,2-dimethyl-3-(2-methylprop-2-enoyloxy)propyl] 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC(C)(C)COC(=O)C(C)=C ULQMPOIOSDXIGC-UHFFFAOYSA-N 0.000 description 1
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 1
- RMKZLFMHXZAGTM-UHFFFAOYSA-N [dimethoxy(propyl)silyl]oxymethyl prop-2-enoate Chemical compound CCC[Si](OC)(OC)OCOC(=O)C=C RMKZLFMHXZAGTM-UHFFFAOYSA-N 0.000 description 1
- 150000008062 acetophenones Chemical class 0.000 description 1
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000005907 alkyl ester group Chemical group 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 125000002178 anthracenyl group Chemical group C1(=CC=CC2=CC3=CC=CC=C3C=C12)* 0.000 description 1
- 125000006615 aromatic heterocyclic group Chemical group 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 150000008366 benzophenones Chemical class 0.000 description 1
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 1
- 125000001743 benzylic group Chemical group 0.000 description 1
- ZCILODAAHLISPY-UHFFFAOYSA-N biphenyl ether Natural products C1=C(CC=C)C(O)=CC(OC=2C(=CC(CC=C)=CC=2)O)=C1 ZCILODAAHLISPY-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
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- 150000001638 boron Chemical class 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 125000004369 butenyl group Chemical group C(=CCC)* 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 1
- ZWLIYXJBOIDXLL-UHFFFAOYSA-N decanedihydrazide Chemical compound NNC(=O)CCCCCCCCC(=O)NN ZWLIYXJBOIDXLL-UHFFFAOYSA-N 0.000 description 1
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- KGGOIDKBHYYNIC-UHFFFAOYSA-N ditert-butyl 4-[3,4-bis(tert-butylperoxycarbonyl)benzoyl]benzene-1,2-dicarboperoxoate Chemical compound C1=C(C(=O)OOC(C)(C)C)C(C(=O)OOC(C)(C)C)=CC=C1C(=O)C1=CC=C(C(=O)OOC(C)(C)C)C(C(=O)OOC(C)(C)C)=C1 KGGOIDKBHYYNIC-UHFFFAOYSA-N 0.000 description 1
- GRGBENNNGZARRZ-UHFFFAOYSA-N dodecanedihydrazide Chemical compound NNC(=O)CCCCCCCCCCC(=O)NN GRGBENNNGZARRZ-UHFFFAOYSA-N 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 1
- 125000005469 ethylenyl group Chemical group 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
- 238000000589 high-performance liquid chromatography-mass spectrometry Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- RXFZJKXZSLVQJV-UHFFFAOYSA-N icosa-8,12-dienedihydrazide Chemical compound NNC(=O)CCCCCCC=CCCC=CCCCCCCC(=O)NN RXFZJKXZSLVQJV-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 238000007561 laser diffraction method Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- FAQJJMHZNSSFSM-UHFFFAOYSA-N phenylglyoxylic acid Chemical class OC(=O)C(=O)C1=CC=CC=C1 FAQJJMHZNSSFSM-UHFFFAOYSA-N 0.000 description 1
- 125000003356 phenylsulfanyl group Chemical group [*]SC1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 239000003505 polymerization initiator Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 235000013824 polyphenols Nutrition 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 125000002568 propynyl group Chemical group [*]C#CC([H])([H])[H] 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000007870 radical polymerization initiator Substances 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical compound CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 description 1
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- JXUKBNICSRJFAP-UHFFFAOYSA-N triethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CCO[Si](OCC)(OCC)CCCOCC1CO1 JXUKBNICSRJFAP-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
- 125000006839 xylylene group Chemical group 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
-
- 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
- C08K5/55—Boron-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
Definitions
- the present invention relates to a display element sealant, a liquid crystal sealant and a cured product thereof, a liquid crystal display panel, and a method for manufacturing the same.
- a liquid crystal display panel includes two transparent substrates with electrodes provided on the surface, a frame-shaped sealing member sandwiched between them, and liquid crystal sealed in a region surrounded by the sealing member.
- the liquid crystal display panel can be manufactured by a liquid crystal dropping method, for example.
- Production of a liquid crystal display panel by a liquid crystal dropping method is as follows: (1) A liquid crystal sealing agent is applied to the inner edge of a transparent substrate to form a frame for filling with liquid crystal; (2) Liquid crystal is dropped into the frame; (3) After superposing two substrates under high vacuum while the liquid crystal sealant is in an uncured state, (4) curing the liquid crystal sealant.
- the liquid crystal dropping method photocuring or thermosetting is performed in a state where the uncured liquid crystal sealant and the liquid crystal are in contact with each other. Accordingly, the liquid crystal sealant is required to have high curability in order to reduce elution into the liquid crystal. In particular, since the light does not easily reach under the substrate (light shielding portion) on which the wiring and the black matrix are formed, the liquid crystal sealant is likely to be insufficiently cured. Therefore, the liquid crystal sealant is required to have high curability that can be sufficiently cured even with a small amount of light.
- the photocurable composition has an organic boron compound (A) in which one or more naphthyl groups are bonded to a boron atom, a sensitizer (B), a triazine compound (C), and an ethylenically unsaturated bond.
- a photocurable composition containing an organic compound (D) for example, Patent Document 2), a sensitizer (A), an organic boron salt (B), and a compound (C) having an ethylenically unsaturated bond.
- the photocurable composition containing for example, patent document 3 is known.
- the sealing agent for liquid crystal display elements of Patent Document 1 and the photocurable compositions of Patent Documents 2 and 3 do not have sufficient curability. Therefore, when these photocurable compositions are used as, for example, a liquid crystal sealant for a liquid crystal dropping method, not only is the liquid crystal sealant hard to be cured at the light shielding portion of the substrate, but also the elution into the liquid crystal may not be suppressed. There is.
- liquid crystal display panels are becoming higher definition such as 4K and 8K.
- the density of wiring is increasing due to the increase in the number of pixels, and accordingly, the aperture ratio of the wiring portion (the area where the wiring is formed) of the liquid crystal display panel tends to decrease. Since the liquid crystal sealing agent is usually disposed in the wiring portion, the liquid crystal sealing agent provided in the light shielding portion is cured even in a liquid crystal display panel having such a wiring portion having a low aperture ratio and a large number of light shielding portions. Is required.
- the present invention has been made in view of the above problems, and has an object of providing a photocurable resin composition having high curability that can be sufficiently cured even with a small amount of light, for example, suitable as a display element sealant. To do.
- R 1 to R 4 each represents an optionally substituted alkyl group, an optionally substituted alkenyl group, an optionally substituted alkynyl group, an optionally substituted cycloalkyl group, or an optionally substituted group.
- the photopolymerization initiator B is one or more selected from the group consisting of a thioxanthone compound and an anthraquinone compound.
- Element sealant. A liquid crystal sealant comprising the display element sealant according to any one of [1] to [4].
- [6] A cured product of the liquid crystal sealant according to [5].
- the liquid crystal sealant according to [5] which is used for sealing a liquid crystal layer of a liquid crystal display panel in which an opening ratio of a wiring portion where the liquid crystal sealant is disposed is 50% or less.
- [8] A step of forming a seal pattern on one substrate using the liquid crystal sealant according to [5], and in the state of the seal pattern in the uncured state of the seal pattern, or the one substrate Dropping the liquid crystal on the other substrate paired with, the step of superimposing the one substrate and the other substrate through the seal pattern, and the step of curing the seal pattern, A method for manufacturing a liquid crystal display panel.
- Photocurable resin composition The photocurable resin composition of the present invention comprises a curable compound A, a photopolymerization initiator B, and an ammonium salt C of a quaternary organoboron anion, and if necessary, thermosetting.
- Compound D, thermosetting agent E, and other component F may further be included.
- Curable compound A The curable compound A contained in the photocurable resin composition of the present invention is a compound having an ethylenically unsaturated double bond in the molecule.
- the compound having an ethylenically unsaturated double bond in the molecule is preferably a compound having a (meth) acryloyl group in the molecule.
- the number of (meth) acryloyl groups per molecule is 1 or 2 or more.
- the compound having a (meth) acryloyl group in the molecule may be a monomer, an oligomer or a polymer.
- (Meth) acryloyl group means acryloyl group or methacryloyl group
- (meth) acrylate means acrylate or methacrylate.
- Examples of compounds having one (meth) acryloyl group in one molecule include (meth) acrylic acid such as methyl (meth) acrylate, ethyl (meth) acrylate, and (meth) acrylic acid 2-hydroxyethyl ester. Alkyl esters are included.
- Examples of compounds having two or more (meth) acryloyl groups in one molecule include di (meth) acrylates such as polyethylene glycol, propylene glycol, and polypropylene glycol; di (meth) tris (2-hydroxyethyl) isocyanurate Acrylate; Di (meth) acrylate of diol obtained by adding 4 mol or more of ethylene oxide or propylene oxide to 1 mol of neopentyl glycol; Diol obtained by adding 2 mol of ethylene oxide or propylene oxide to 1 mol of bisphenol A Di (meth) acrylate of triol obtained by adding 3 mol or more of ethylene oxide or propylene oxide to 1 mol of trimethylolpropane; bisphenol A1 Di (meth) acrylate of a diol obtained by adding 4 mol or more of ethylene oxide or propylene oxide to the above; tris (2-hydroxyethyl) isocyanurate tri (meth) acrylate; trimethylolprop
- the curable compound A may further have an epoxy group in the molecule.
- the number of epoxy groups per molecule is 1 or 2 or more. If the curable compound A further has not only a (meth) acryloyl group but also an epoxy group in the molecule, the photocurable resin composition containing the curable compound A can be provided with photocurability and thermosetting. Thereby, the sclerosis
- the compound having a (meth) acryloyl group and an epoxy group in the molecule can be, for example, a (meth) acrylic acid glycidyl ester obtained by reacting an epoxy compound and (meth) acrylic acid in the presence of a basic catalyst. .
- the epoxy compound to be reacted may be a polyfunctional epoxy compound having two or more epoxy groups in the molecule, and suppresses the decrease in the adhesiveness of the cured product of the photocurable resin composition due to excessive increase in the crosslinking density.
- a bifunctional epoxy compound is preferable.
- bifunctional epoxy compounds include bisphenol type epoxy compounds (bisphenol A type, bisphenol F type, 2,2′-diallyl bisphenol A type, bisphenol AD type, hydrogenated bisphenol type, etc.), biphenyl type epoxy compounds, And naphthalene type epoxy compounds. Of these, bisphenol A type and bisphenol F type bisphenol type epoxy compounds are preferred from the viewpoint of good coating properties.
- the bisphenol type epoxy compound has advantages such as excellent coating properties as compared with the biphenyl ether type epoxy compound.
- the compound having a (meth) acryloyl group and an epoxy group in the molecule may be one kind or a combination of two or more kinds.
- a compound A1 having a (meth) acryloyl group in the molecule and not having an epoxy group may be combined with a compound A2 having a (meth) acryloyl group and an epoxy group in the molecule.
- the photocurable resin composition further contains an epoxy compound as the thermosetting compound D, the epoxy compound, and the compound A1 having a (meth) acryloyl group in the molecule and not having an epoxy group, Can improve the compatibility.
- the content of the compound A2 having a (meth) acryloyl group and an epoxy group in the molecule is not particularly limited, but may be, for example, 30% by mass or more based on the total of the curable compound A.
- the weight average molecular weight of the curable compound A is preferably about 310 to 1,000.
- the weight average molecular weight of the curable compound A can be measured in terms of polystyrene by, for example, gel permeation chromatography (GPC).
- the content of the curable compound A is preferably 40 to 80% by mass, and more preferably 50 to 75% by mass with respect to the photocurable resin composition.
- Photopolymerization initiator B The photopolymerization initiator B contained in the photocurable resin composition of the present invention is not particularly limited, but may be a self-cleavage type photopolymerization initiator or a hydrogen abstraction type photopolymerization initiator. Also good.
- Examples of self-cleaving photopolymerization initiators include alkylphenone compounds (eg, benzyl dimethyl ketals such as 2,2-dimethoxy-1,2-diphenylethane-1-one (IRSFACURE 651 manufactured by BASF), 2- ⁇ -aminoalkylphenones such as methyl-2-morpholino (4-thiomethylphenyl) propan-1-one (BASF IRGACURE 907) and 1-hydroxy-cyclohexyl-phenyl-ketone (BASF IRGACURE 184) ⁇ -hydroxyalkylphenone etc.), acylphosphine oxide compounds (eg 2,4,6-trimethylbenzoindiphenylphosphine oxide etc.), titanocene compounds (eg bis ( ⁇ 5-2,4-cyclopentadien-1-yl)- Bis (2,6-difluoro-3- (1H-pyrrol-1-yl ) -Phenyl) titanium, etc.), acetophenone compounds (eg die
- hydrogen abstraction type photopolymerization initiator examples include benzophenone compounds (for example, benzophenone, methyl-4-phenylbenzophenone, o-benzoylbenzoate, 4,4'-dichlorobenzophenone, hydroxybenzophenone, 4-benzoyl-4'-).
- benzophenone compounds for example, benzophenone, methyl-4-phenylbenzophenone, o-benzoylbenzoate, 4,4'-dichlorobenzophenone, hydroxybenzophenone, 4-benzoyl-4'-).
- the absorption wavelength of the photopolymerization initiator B is not particularly limited, it is easy to obtain high curability by combining with the ammonium salt C of a quaternary organoboron anion, so that the photopolymerization initiator absorbs light having a wavelength of 360 nm or more. B is preferred. Among these, photopolymerization initiator B that absorbs light having a wavelength of 360 to 780 nm is more preferable, and photopolymerization initiator B that absorbs light having a wavelength of 360 to 430 nm is more preferable.
- Examples of the photopolymerization initiator B that absorbs light having a wavelength of 360 nm or more include alkylphenone compounds, acylphosphine oxide compounds, titanocene compounds, oxime ester compounds, thioxanthone compounds, and anthraquinone compounds. Are thioxanthone compounds and anthraquinone compounds.
- the molecular weight of the photopolymerization initiator B is preferably 200 or more and 5000 or less, for example. If the molecular weight is 200 or more, elution into the liquid crystal may be difficult to occur. When the molecular weight is 5000 or less, the compatibility with the curable compound A can be improved, so that sufficient curability is easily obtained.
- the molecular weight of the photopolymerization initiator B is more preferably 230 or more and 3000 or less, and further preferably 230 or more and 1500 or less.
- the molecular weight of the photopolymerization initiator B can be determined as “relative molecular mass” of the molecular structure of the main peak detected when high performance liquid chromatography (HPLC: High Performance Liquid Chromatography) is performed under the following conditions.
- a photopolymerization initiator B is dissolved in THF (tetrahydrofuran) to prepare a sample solution, and high performance liquid chromatography (HPLC) measurement is performed under the following measurement conditions. Then, the area percentage of the detected peak (ratio of the area of each peak to the sum of the areas of all peaks) is obtained, and the presence or absence of the main peak is confirmed.
- the main peak refers to a peak having the highest intensity (peak having the highest peak height) among all peaks detected at a detection wavelength characteristic of each compound (for example, 400 nm for a thioxanthone compound).
- the relative molecular mass corresponding to the peak apex of the detected main peak can be measured by liquid chromatography mass spectrometry (LC / MS).
- Equipment Acquity TM H-Class system / SQ Detector made by waters
- Column Acquity UPLC BEH C18, 2.1mmID ⁇ 100mm Particle size: 1.7 ⁇ m
- Mobile phase A: Acetonitrile B: 5 mM ammonium acetate aqueous solution
- a / B 60/40 (0-4 minutes) 95/5 (4-9 minutes) 95/5 (9-10 minutes)
- Ionization ESI (electrospray ionization), positive / negative ion measurement
- PDA detector Measurement wavelength: 190-500 nm
- the photopolymerization initiator B may be one type or a combination of two or more types.
- the content of the photopolymerization initiator B is preferably 0.01 to 10% by mass with respect to the curable compound A.
- the content of the photopolymerization initiator B is 0.01% by mass or more, sufficient photocurability is easily obtained.
- the content of the photopolymerization initiator B is 10% by mass or less, since the elution into the liquid crystal is small, the contamination of the liquid crystal is easily reduced.
- the content of the photopolymerization initiator B is more preferably 0.1 to 5% by mass, further preferably 0.1 to 3% by mass, and more preferably 0.1 to 2% with respect to the curable compound A. It is particularly preferable that the content be 5% by mass.
- the structure of the photopolymerization initiator B contained in the photocurable resin composition is specified by combining high performance liquid chromatography (HPLC) and liquid chromatography mass spectrometry (LC / MS) with NMR measurement or IR measurement. be able to.
- HPLC high performance liquid chromatography
- LC / MS liquid chromatography mass spectrometry
- NMR measurement or IR measurement IR measurement
- a thioxanthone compound is used as the photopolymerization initiator B
- the following procedure can be used. 1) A solution in which a photocurable resin composition is dissolved in tetrahydrofuran (THF) is centrifuged by a centrifugal separator to precipitate particle components such as silica particles and thermoplastic resin particles. The obtained solution is filtered through a filter to remove the particle component, thereby obtaining a sample solution.
- THF tetrahydrofuran
- HPLC high performance liquid chromatography
- the HPLC measurement method and conditions are the same as the HPLC measurement method and conditions in the above-described molecular weight measurement.
- HPLC measurement the relative molecular mass and composition formula of the main peak detected by a detector with a wavelength of 400 nm characteristic of the thioxanthone skeleton are measured by liquid chromatography mass spectrometry (LC / MS). To do.
- LC / MS measurement method and conditions are the same as the LC / MS measurement method and conditions in the aforementioned molecular weight measurement.
- the NMR measurement or IR measurement is performed on the sample solution obtained in 1) above. Thereby, the chemical structure of the thioxanthone compound is specified.
- ammonium salt C of quaternary organoboron anion C The ammonium salt C of the quaternary organic boron anion activates the photopolymerization initiator B and can itself function as a sensitizer that contributes to the curing reaction.
- the ammonium salt C of the quaternary organic boron anion preferably has a ring having (4n + 2) (n is an integer of 0 or more) ⁇ electrons.
- the ring having (4n + 2) ⁇ electrons is preferably an aromatic hydrocarbon ring and an aromatic heterocyclic ring, and more preferably an aromatic hydrocarbon ring.
- the ammonium salt C of a quaternary organoboron anion containing an aromatic hydrocarbon ring or an aromatic heterocycle is likely to be activated because it can absorb light in a wider wavelength region.
- Such an ammonium salt C of a quaternary organic boron anion is preferably represented by the following formula (1).
- R 1 to R 4 in the formula (1) are an optionally substituted alkyl group, an optionally substituted alkenyl group, an optionally substituted alkynyl group, an optionally substituted cycloalkyl group, a substituted An aralkyl group which may be substituted, an aryl group which may be substituted, or a heteroaryl group which may be substituted.
- R 1 to R 4 may be the same or different.
- the alkyl group in the alkyl group which may be substituted is an alkyl group having 1 to 20 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, an octyl group, and a decyl group.
- the alkenyl group in the optionally substituted alkenyl group is an alkenyl group having 2 to 20 carbon atoms, and examples thereof include an ethylenyl group, a propenyl group, and a butenyl group.
- the alkynyl group in the optionally substituted alkynyl group is an alkynyl group having 2 to 20 carbon atoms, and examples thereof include an ethynyl group and a propynyl group.
- the cycloalkyl group in the cycloalkyl group which may be substituted is a cycloalkyl group having 5 to 20 carbon atoms, and examples thereof include a cyclopentyl group and a cyclohexyl group.
- the aralkyl group in the aralkyl group which may be substituted is an aralkyl group having 7 to 20 carbon atoms, and examples thereof include a benzyl group.
- the aryl group in the aryl group which may be substituted is an aryl group having 6 to 20 carbon atoms, and examples thereof include a phenyl group, a naphthyl group, an anthracenyl group and the like.
- the heteroaryl group in the optionally substituted heteroaryl group is a heteroaryl group having 3 to 20 carbon atoms, and examples thereof include a pyridyl group.
- the substituent that the alkyl group, alkenyl group, alkynyl group, cycloalkyl group, aralkyl group, aryl group or heteroaryl group may have is not particularly limited, but is preferably an electron-donating group.
- the electron donating group can make it difficult to delocalize the electron density of the quaternary organoboron anion.
- ammonium salts of quaternary organic boron anions are unlikely to exist stably. Therefore, it is considered that the ammonium salt C of the quaternary organoboron anion having an electron donating group is relatively easily dissociated when receiving energy from the photopolymerization initiator B, so that the curing reaction of the curable compound A is likely to start.
- Examples of the electron donating group include alkyl groups such as methyl group, ethyl group, propyl group and t-butyl group, alkoxy groups such as methoxy group, hydroxyl groups and the like.
- At least one (preferably two, more preferably three) of R 1 to R 4 is an optionally substituted aryl group or an optionally substituted heteroaryl group, more preferably a substituted group.
- the ammonium salt C of a quaternary organoboron anion containing an aromatic hydrocarbon ring or an aromatic heterocycle is easily activated because it easily absorbs light in a wider wavelength region. Also, the greater the number of aromatic hydrocarbon rings or aromatic heterocycles contained in the ammonium salt C of the quaternary organic boron anion, the easier it is for the absorption wavelength to shift to the longer wavelength side and for activation.
- Examples of quaternary organoboron anions include n-butyltriphenylborate, n-octyltriphenylborate, n-dodecyltriphenylborate, sec-butyltriphenylborate, t-butyltriphenylborate, benzyltriphenylborate, n-butyltri (4-tolyl) borate, n-butyltri (2-tolyl) borate, n-butyltri (4-t-butylphenyl) borate, n-butyltrinaphthylborate, n-butyltri (3-methylnaphthyl) borate , Tetra-n-butyl borate, di-n-butyl diphenyl borate, tetrabenzyl borate and the like.
- Z + in formula (1) is an ammonium cation.
- the ammonium cation is preferably a tetraalkylammonium cation.
- Examples of the tetraalkylammonium cation include a tetramethylammonium cation, a tetraethylammonium cation, a tetra n-butylammonium cation, and a tetraoctylammonium cation.
- the molecular weight of the ammonium salt C of the quaternary organic boron anion is preferably 350 to 900, for example.
- the molecular weight of the ammonium salt C of the quaternary organic boron anion is 350 or more, it is difficult to elute into the liquid crystal, and thus it is easy to reduce liquid crystal contamination.
- the molecular weight of the ammonium salt C of the quaternary organic boron anion is 900 or less, the compatibility with the curable compound A is not easily lost, and it is easily dispersed uniformly.
- the molecular weight of the ammonium salt C of the quaternary organic boron anion is more preferably 450 to 800.
- the molecular weight of the ammonium salt C of the quaternary organic boron anion can be measured in the same manner as described above.
- the content of the ammonium salt C of the quaternary organic boron anion is preferably 0.01 to 10% by mass with respect to the curable compound A.
- the content of the ammonium salt C of the quaternary organic boron anion is 0.01% by mass or more, the photopolymerization initiator B can be sufficiently activated, so that sufficient curability is easily obtained.
- the content of the ammonium salt C of the quaternary organic boron anion is 10% by mass or less, elution into the liquid crystal is difficult to occur without impairing the curability.
- the content of the ammonium salt C of the quaternary organic boron anion is more preferably 0.1 to 5% by mass, further preferably 0.1 to 3% by mass with respect to the curable compound A. It is particularly preferably 1 to 2.5% by mass.
- the structure of the ammonium salt C of the quaternary organic boron anion contained in the photocurable resin composition should be confirmed in the same manner as the method for confirming the structure of the photopolymerization initiator B contained in the photocurable resin composition described above. Can do.
- photopolymerization initiator B: ammonium salt of the quaternary organic boron anion C 1: 0.05 to 1: 3. preferable.
- the photopolymerization initiator B absorbs the irradiated light and excites it, and its energy moves to the ammonium salt C of the quaternary organic boron anion.
- the curing reaction of the curable compound A proceeds from the activated ammonium salt C of the quaternary organoboron anion.
- the curing reaction starting from the excited photopolymerization initiator B itself proceeds. Therefore, it is considered that the curability is enhanced synergistically by combining the photopolymerization initiator B and the ammonium salt C of the quaternary organic boron anion.
- thioxanthone compounds and anthraquinone compounds have relatively low reactivity in the visible light region, but when combined with the ammonium salt C of a quaternary organoboron anion, sufficient curing is also possible in the visible light region. It is easy to get sex.
- thermosetting compound D is preferably an epoxy compound having an epoxy group in the molecule. However, the thermosetting compound D is different from the curable compound A.
- the thermosetting compound D is more preferably an epoxy compound having no (meth) acryloyl group in the molecule.
- the epoxy compound may be any of a monomer, an oligomer or a polymer. Epoxy compounds, for example, have low solubility and diffusibility in liquid crystal when using a photocurable resin composition as a liquid crystal sealant, and not only improve the display characteristics of the resulting liquid crystal panel, but also the moisture resistance of the cured product. Can increase sex.
- the epoxy compound may be an aromatic epoxy compound having a weight average molecular weight of 500 to 10,000, preferably 1,000 to 5,000.
- the weight average molecular weight of the epoxy compound can be measured in terms of polystyrene by gel permeation chromatography (GPC).
- aromatic epoxy compounds include the reaction of aromatic diols typified by bisphenol A, bisphenol S, bisphenol F, bisphenol AD, etc., and diols modified with ethylene glycol, propylene glycol, alkylene glycol, and epichlorohydrin.
- Polyvalent glycidyl ether compounds; xylylene phenol resin glycidyl ether compounds and the like are included.
- cresol novolac type epoxy compound cresol novolac type epoxy compound, phenol novolac type epoxy compound, bisphenol A type epoxy compound, bisphenol F type epoxy compound, triphenolmethane type epoxy compound, triphenolethane type epoxy compound, trisphenol type epoxy compound, dicyclopentadiene type Epoxy compounds, diphenyl ether type epoxy compounds and biphenyl type epoxy compounds are preferred.
- the epoxy compound may be one type or a combination of two or more types.
- the epoxy compound may be liquid or solid.
- a solid epoxy compound is preferable from the viewpoint of easily improving the moisture resistance of the cured product.
- the softening point of the solid epoxy compound is preferably 40 ° C. or higher and 150 ° C. or lower.
- the content of the thermosetting compound D is preferably 3.8 to 50% by mass and more preferably 5 to 30% by mass with respect to the curable compound A.
- the content of the thermosetting compound D with respect to the curable compound A is 3.8% by mass or more, the moisture resistance of the cured product and the adhesive strength to the glass substrate can be further easily increased. Sometimes compatibility with the curable compound A tends to be even better.
- the content of the thermosetting compound D is preferably 3 to 20% by mass with respect to the photocurable resin composition.
- the content of the thermosetting compound D with respect to the photocurable resin composition is 3% by mass or more, the moisture resistance of the cured product is easily improved, and when it is 20% by mass or less, the photocurable resin composition has An excessive increase in viscosity can be suppressed.
- the content of the thermosetting compound D is more preferably 3 to 15% by mass, and further preferably 4 to 15% by mass with respect to the photocurable resin composition.
- thermosetting agent E is a compound that does not cure the thermosetting compound D under normal storage conditions (room temperature, under visible light, etc.), but cures the compound when given heat.
- the photocurable resin composition containing the thermosetting agent E is excellent in storage stability and thermosetting.
- the thermosetting agent E is preferably an epoxy curing agent.
- the melting point of the epoxy curing agent is 50 ° C. or more and 250 ° C. or less, although it depends on the thermosetting temperature from the viewpoint of enhancing the viscosity stability of the photocurable resin composition and not impairing the moisture resistance of the cured product.
- the temperature is preferably 100 ° C. or higher and 200 ° C. or lower, and more preferably 150 ° C. or higher and 200 ° C. or lower.
- epoxy curing agent examples include organic acid dihydrazide thermal latent curing agent, imidazole thermal latent curing agent, amine adduct thermal latent curing agent, and polyamine thermal latent curing agent.
- organic acid dihydrazide thermal latent curing agents include adipic acid dihydrazide (melting point 181 ° C.), 1,3-bis (hydrazinocarboethyl) -5-isopropylhydantoin (melting point 120 ° C.), 7,11-octa Decadiene-1,18-dicarbohydrazide (melting point 160 ° C.), dodecanedioic acid dihydrazide (melting point 190 ° C.), sebacic acid dihydrazide (melting point 189 ° C.) and the like.
- imidazole-based thermal latent curing agents examples include 2,4-diamino-6- [2′-ethylimidazolyl- (1 ′)]-ethyltriazine (melting point 215 to 225 ° C.) and 2-phenylimidazole (melting point) 137-147 ° C.) and the like.
- the amine adduct thermal latent curing agent is a thermal latent curing agent comprising an addition compound obtained by reacting an amine compound having catalytic activity with an arbitrary compound, and examples thereof include Ajinomoto Fine Techno Co., Ltd. ) Amicure PN-40 (melting point 110 ° C.), Ajinomoto Fine Techno Co., Ltd.
- the polyamine thermal latent curing agent is a thermal latent curing agent having a polymer structure obtained by reacting an amine and an epoxy.
- the epoxy curing agent may be only one kind or a combination of two or more kinds.
- the content of the thermosetting agent E is preferably 3.8 to 75% by mass with respect to the curable compound A, more preferably 3.8 to 50% by mass, and 10 to 40% by mass. More preferably.
- the content of the thermosetting agent E with respect to the curable compound A is 3.8% by mass or more, the thermosetting property of the curable compound A is easily increased, and when it is 50% by mass or less, the contamination of the liquid crystal is easily suppressed. .
- the content of the thermosetting agent E is preferably 3 to 30% by mass, more preferably 3 to 20% by mass, and more preferably 5 to 20% by mass with respect to the photocurable resin composition. Further preferred.
- the photocurable resin composition containing the thermosetting agent E can be a one-component curable resin composition.
- the one-component curable resin composition is excellent in workability because it is not necessary to mix the main agent and the curing agent in use.
- the total content of the thermosetting compound D and the thermosetting agent E is preferably 6 to 50% by mass, more preferably 6 to 35% by mass, with respect to the photocurable resin composition. More preferably, it is 30 mass%.
- the photocurable resin composition of the present invention may further contain thermoplastic resin particles as necessary.
- the thermoplastic resin particles include a thermoplastic resin having a softening point temperature measured by the ring and ball method of 50 to 120 ° C., preferably 70 to 100 ° C., and a number average particle diameter of 0.05 to 5 ⁇ m, preferably 0.8. It can be 1 to 3 ⁇ m.
- the photocurable resin composition containing such thermoplastic resin particles can relieve the shrinkage stress generated in the cured product.
- the number average particle diameter is set to the upper limit value or less, it is possible to prevent the coating stability from being lowered by the thermoplastic resin particles when forming a seal member having a thin line width.
- the number average particle size can be measured with a dry particle size distribution meter.
- thermoplastic resin particles include fine particles obtained by suspension polymerization of a resin containing an epoxy group and a double bond group with a monomer capable of radical polymerization.
- the resin containing an epoxy group and a double bond group include a resin obtained by reacting a bisphenol F type epoxy resin and methacrylic acid in the presence of a tertiary amine.
- radically polymerizable monomers include butyl acrylate, glycidyl methacrylate, and divinylbenzene.
- the photocurable resin composition of the present invention may further contain a filler as necessary.
- a photocurable resin composition containing a filler may have good viscosity, strength of a cured product, linear expansion, and the like.
- fillers include calcium carbonate, magnesium carbonate, barium sulfate, magnesium sulfate, aluminum silicate, zirconium silicate, iron oxide, titanium oxide, titanium nitride, aluminum oxide (alumina), zinc oxide, silicon dioxide, potassium titanate, Inorganic fillers such as kaolin, talc, glass beads, sericite activated clay, bentonite, aluminum nitride, silicon nitride are included. Of these, silicon dioxide and talc are preferable.
- the shape of the filler may be a regular shape such as a spherical shape, a plate shape, or a needle shape, or may be an irregular shape.
- the average primary particle diameter of the filler is preferably 1.5 ⁇ m or less, and the specific surface area is preferably 0.5 to 20 m 2 / g.
- the average primary particle diameter of the filler can be measured by a laser diffraction method described in JIS Z8825-1.
- the specific surface area of the filler can be measured by the BET method described in JIS Z8830.
- the photo-curable resin composition of the present invention is optionally combined with a thermal radical polymerization initiator, a coupling agent such as a silane coupling agent, an ion trapping agent, an ion exchange agent, a leveling agent, a pigment, a dye, a plasticizer, and a quenching agent.
- a coupling agent such as a silane coupling agent, an ion trapping agent, an ion exchange agent, a leveling agent, a pigment, a dye, a plasticizer, and a quenching agent.
- An additive such as a foaming agent may be further included.
- silane coupling agent examples include vinyltrimethoxysilane, ⁇ - (meth) acryloxypropyltrimethoxysilane, ⁇ -glycidoxypropyltrimethoxysilane, ⁇ -glycidoxypropyltriethoxysilane, and the like.
- the content of the silane coupling agent may be 0.01 to 5% by mass with respect to the photocurable resin composition. When the content of the silane coupling agent is 0.01% by mass or more, the cured product of the photocurable resin composition tends to have sufficient adhesiveness.
- the photocurable resin composition of the present invention may further contain a spacer for adjusting the gap of the liquid crystal display panel.
- the total content of other components F is preferably 1 to 50% by mass with respect to the photocurable resin composition.
- the total content of the other components F is 50% by mass or less, the viscosity of the photocurable resin composition is hardly excessively increased, and the coating stability is hardly impaired.
- the viscosity of the photocurable resin composition of the present invention at 25 ° C. and 2.5 rpm of the E-type viscometer is preferably 200 to 450 Pa ⁇ s, and preferably 300 to 400 Pa ⁇ s. It is more preferable that When the viscosity is in the above range, the applicability of the photocurable resin composition by the dispenser becomes good.
- the photocurable resin composition of the present invention can be used as, for example, a sealing agent.
- the sealing agent is preferably a display element sealing agent used for sealing display elements such as liquid crystal display elements, organic EL elements, and LED elements.
- the display element sealant is particularly preferably a liquid crystal sealant, and more preferably a liquid crystal sealant for a liquid crystal dropping method.
- the display element panel of the present invention includes a pair of substrates, a display element disposed between the pair of substrates, and a seal member for sealing the display element.
- the seal member can be a cured product of the display element sealant of the present invention.
- the display element sealing agent of the present invention is composed of the photocurable resin composition of the present invention.
- Examples of display elements include liquid crystal display elements, organic EL elements, LED elements, and the like.
- a liquid crystal display element is preferable because the photocurable resin composition of the present invention can satisfactorily suppress liquid crystal contamination.
- the liquid crystal display panel of the present invention includes a space surrounded by a pair of substrates, a frame-shaped seal member disposed between the pair of substrates, and a frame-shaped seal member between the pair of substrates.
- a filled liquid crystal layer liquid crystal display element.
- the seal member can be a cured product of the liquid crystal sealant of the present invention.
- the liquid crystal sealing agent of the present invention comprises the photocurable resin composition of the present invention.
- the pair of substrates are both transparent substrates.
- the material of the transparent substrate can be glass or plastic such as polycarbonate, polyethylene terephthalate, polyethersulfone and PMMA.
- a matrix-like TFT, a color filter, a black matrix, or the like may be disposed on the surface of one of the pair of substrates.
- An alignment film may be further disposed on the surface of the one substrate.
- the alignment film contains a known organic alignment agent or inorganic alignment agent.
- the display method of the liquid crystal display panel is not particularly limited, and may be any of TN method (Twisted Nematic), VA method (Visual Alignment), IPS method (In Plane Switching), PSA method (Polymer-Stained Alignment) and the like. .
- the wiring portion is a region where wiring is formed (in the outer peripheral portion of the liquid crystal display panel), and the area of the wiring portion is the sum of the area of the opening and the area of the light shielding portion.
- the light shielding part is an area where a black matrix and wiring are arranged.
- the width of the light shielding portion may be 40 to 200 ⁇ m, for example.
- the liquid crystal display panel is manufactured using the liquid crystal sealant of the present invention.
- a liquid crystal dropping method and a liquid crystal injecting method as a method for manufacturing a liquid crystal display panel, but the liquid crystal display panel of the present invention is preferably manufactured by a liquid crystal dropping method.
- the manufacturing method of the liquid crystal display panel by the liquid crystal dropping method is 1) forming a seal pattern of the liquid crystal sealant of the present invention on one substrate; 2) dropping the liquid crystal in a region surrounded by the seal pattern of the substrate or a region of the other substrate facing the region surrounded by the seal pattern in a state where the seal pattern is uncured; 3) a step of superimposing one substrate and the other substrate through a seal pattern; 4) curing the seal pattern.
- the uncured state of the seal pattern means a state in which the curing reaction of the liquid crystal sealant has not progressed to the gel point. For this reason, in the step 2), in order to suppress dissolution of the liquid crystal sealant in the liquid crystal, the seal pattern may be semi-cured by light irradiation or heating.
- the step 4 only curing by light irradiation may be performed, but curing by light irradiation may be performed and then curing by heating may be performed. That is, the step 4) includes a step of irradiating the seal pattern with light to cure the seal pattern; when the liquid crystal sealant further includes the aforementioned thermosetting agent (E), the seal pattern irradiated with light A step of heating and curing may be further included. Since the liquid crystal sealant can be cured in a short time by curing by light irradiation, dissolution in the liquid crystal can be suppressed. By combining curing by light irradiation and curing by heating, damage to the liquid crystal layer due to light can be reduced compared to the case of only curing by light irradiation.
- the light to be irradiated is not particularly limited, but is preferably light having a wavelength of 370 to 450 nm. This is because the light having the above wavelength causes relatively little damage to the liquid crystal and the drive electrode.
- a known light source that emits ultraviolet light or visible light can be used.
- a high-pressure mercury lamp, a low-pressure mercury lamp, a metal halide lamp, a xenon lamp, a fluorescent lamp, or the like can be used.
- the light irradiation energy may be energy that can cure the curable compound A.
- the photocuring time is, for example, about 10 minutes although it depends on the composition of the liquid crystal sealant.
- thermosetting temperature is 120 ° C., for example, although it depends on the composition of the liquid crystal sealant, and the thermosetting time is about 2 hours.
- the liquid crystal sealing agent of the present invention contains the photopolymerization initiator B and the ammonium salt C of the quaternary organic boron anion, it exhibits high curability even with a small amount of light. Therefore, when the liquid crystal display panel is manufactured, the liquid crystal sealant of the present invention can be sufficiently cured even in a light shielding portion such as a wiring on a substrate or under a black matrix. Further, since the liquid crystal sealant of the present invention exhibits high curability, it is difficult for uncured components to remain, and elution of the photopolymerization initiator B and the ammonium salt C of the quaternary organic boron anion into the liquid crystal can be reduced.
- liquid crystal materials used for liquid crystal display panels that can handle high response speed, high contrast, high viewing angle, and high image quality, such as VA, PSA, and IPS, are easily affected by external factors. There is a possibility that the performance of the liquid crystal material may be deteriorated by UV at the time of curing the liquid crystal sealant and the constituent components of the liquid crystal sealant.
- high definition of the liquid crystal display panel that is, high density of wiring due to an increase in the number of pixels is progressing, and accordingly, the aperture ratio of the wiring part where the liquid crystal sealant is disposed is reduced (the light shielding part is increased). There is a tendency.
- the liquid crystal sealant of the present invention since the liquid crystal sealant of the present invention has high photocurability, photocuring proceeds even in a portion that is blocked by a black matrix or the like (a portion that is not directly exposed to light, a light blocking portion). Can be partially cured. For example, when light having a wavelength of 400 nm or more is irradiated at an irradiation intensity of 100 mW / cm 2 for 20 seconds, it is preferable that 45 ⁇ m or more can be cured from the edge. As described above, the progress of photocuring also in the light shielding portion can suppress the deterioration of the liquid crystal due to the uncured component of the liquid crystal sealant. Therefore, the liquid crystal sealant of the present invention is suitable for sealing a liquid crystal layer of a liquid crystal display panel in which the opening ratio of the wiring portion where the liquid crystal sealant is disposed is 50% or less.
- Material (Curable Compound A) A-1 Methacrylic acid-modified bisphenol F type epoxy resin obtained in Synthesis Example 1 (95% partially methacrylic product) (Synthesis Example 1) 160 g of liquid bisphenol F type epoxy resin (YDF-8170C, manufactured by Nippon Steel & Sumikin Chemical Co., Ltd., epoxy equivalent 160 g / eq), 0.1 g of p-methoxyphenol as a polymerization inhibitor, 0.2 g of triethanolamine as a catalyst, and 81.7 g of methacrylic acid was charged into the flask, dried air was fed into the flask, and the mixture was reacted at 90 ° C. with stirring under reflux for 5 hours. The obtained compound was washed 20 times with ultrapure water to obtain a methacrylic acid-modified bisphenol F type epoxy resin (curable compound A-1). As a result of GPC analysis of this resin, the weight average molecular weight was 792.
- A-2 Acrylic acid-modified bisphenol F type epoxy resin obtained in Synthesis Example 2 (50% partially acrylated product) (Synthesis Example 2) First, 175 g of bisphenol F type epoxy resin (YDF-8170C, manufactured by Nippon Steel & Sumikin Chemical Co., Ltd., epoxy equivalent 160 g / eq) in a 500 ml four-necked flask equipped with a stirrer, a gas introduction tube, a thermometer, and a cooling tube, acrylic acid : 37 g, triethanolamine: 0.2 g as a catalyst, and hydroquinone monomethyl ether: 0.2 g as a polymerization inhibitor were mixed and heated and stirred at 110 ° C. for 12 hours while blowing dry air.
- bisphenol F type epoxy resin YDF-8170C, manufactured by Nippon Steel & Sumikin Chemical Co., Ltd., epoxy equivalent 160 g / eq
- the obtained reaction product was repeatedly washed with ultrapure water 12 times to obtain an acrylic acid-modified bisphenol F type epoxy resin (curable compound A-2).
- curable compound A-2 acrylic acid-modified bisphenol F type epoxy resin
- it was a bisphenol F type epoxy resin in which 50% of the epoxy groups were modified with acryloyl acid.
- the weight average molecular weight was 692.
- Polyethylene glycol diacrylate Light acrylate 14EG-A, manufactured by Kyoeisha Chemical Co., Ltd. (see formula below, molecular weight 600)
- thermosetting compound D Epoxy resin: manufactured by Mitsubishi Chemical Corporation, jER resin 1004, softening point 97 ° C.
- thermosetting agent E Adipic acid dihydrazide: Nippon Kasei Co., Ltd., ADH, melting point 177-184 ° C
- Example 1 420 parts by mass of curable compound A-1 obtained in Synthesis Example 1 as curable compound A, 200 parts by mass of polyethylene glycol diacrylate (manufactured by Kyoeisha Chemical Co., Ltd., light acrylate 14EG-A), and photopolymerization initiator B 10 parts by mass of Omnipol-TX (manufactured by IGM Resins), 10 parts by mass of P3B (manufactured by Showa Denko) as the ammonium salt C of the quaternary organic boron anion, and an epoxy resin (Mitsubishi Chemical) as the thermosetting compound D 50 parts by mass, jER resin 1004), 90 parts by mass of adipic acid dihydrazide (Nippon Kasei Co., Ltd.
- thermosetting agent E thermosetting agent E
- silica particles as filler S-100, manufactured by Nippon Shokubai Chemical Co., Ltd. 130 parts by mass, 70 parts by mass of F351 (manufactured by Aika Kogyo) as thermoplastic resin particles, and ⁇ -glycidoxy as a silane coupling agent 20 parts by mass of propyltrimethoxysilane (KBE-403, manufactured by Shin-Etsu Chemical Co., Ltd.) is sufficiently mixed using a three-roll mill so as to obtain a uniform liquid, thereby obtaining a photocurable resin composition. It was.
- Examples 2 to 9, Comparative Examples 1 to 3 A photocurable resin composition was obtained in the same manner as in Example 1 except that the composition shown in Table 1 or 2 was changed.
- the curability of the obtained photocurable resin composition was evaluated by the following method.
- a substrate 1 in which five black matrices having a width of 200 ⁇ m were formed on a glass substrate at intervals of 100 ⁇ m and a substrate 2 in which a black matrix was formed on the entire surface of the glass substrate were produced.
- the substrate 1 is coated with the photopolymerizable resin composition so that the application area after bonding the substrate 1 and the substrate 2 becomes a rectangular shape orthogonal to the longitudinal direction of the black matrix, and the thickness after curing is 5 ⁇ m. It was applied as follows.
- the coating area was rectangular with a length (long side) perpendicular to the longitudinal direction of the black matrix of 1500 ⁇ m and a length parallel to the longitudinal direction of the black matrix (short side) of 600 to 800 ⁇ m.
- a release agent was applied to the substrate 2. After these substrates were bonded so that the respective coated surfaces overlapped, light having a wavelength of 400 to 480 nm was irradiated from the substrate 1 side at 100 mW / cm 2 for 20 seconds to obtain a laminated panel. In the laminated panel, the aperture ratio of the region where the liquid crystal sealant is disposed was 33.3%. Next, the substrate 1 was peeled off from the laminated panel. Each 200 ⁇ m-wide black matrix portion of the obtained substrate 1 was observed with an optical microscope, the uncured width and the cured width of the photopolymerizable resin composition were measured, and the average value of the five was determined. Whether it was cured or not was judged by observation with an optical microscope.
- the uncured portion of the photopolymerizable resin composition in each black matrix portion is in the central portion in the width direction of the black matrix; the cured portion is in both end portions in the width direction of the black matrix.
- the cured width in the table indicates the width of each of the two cured portions at both ends in the width direction of the black matrix.
- the photocurable resin compositions of Examples 1 to 9 containing the ammonium salt C of the quaternary organic boron anion are the light of Comparative Examples 1 to 2 not containing the ammonium salt C of the quaternary organic boron anion. It can be seen that the curing time in the photocurable evaluation 1 is shorter than that in the curable resin composition, the uncured width in the photocurable evaluation 2 is small, and both have high curability.
- the photocurable resin composition of No. 9 is lighter than the photocurable resin composition of Examples 6 and 7 in which the oxime ester compound and the ammonium salt C of the quaternary organic boron anion are combined as the photopolymerization initiator B.
- the uncured width is small and has higher curability.
- the present invention can provide a photocurable resin composition having high curability that can be sufficiently cured even with a small amount of light, and suitable as a display element sealant, for example.
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Abstract
Description
R1~R4は、置換されていてもよいアルキル基、置換されていてもよいアルケニル基、置換されていてもよいアルキニル基、置換されていてもよいシクロアルキル基、置換されていてもよいアラルキル基、置換されていてもよいアリール基又は置換されていてもよいヘテロアリール基であり、それぞれ同一であっても異なってもよく、且つ
R1~R4の少なくとも一つは、置換されていてもよいアリール基又は置換されていてもよいヘテロアリール基であり、
Z+は、アンモニウムカチオンである)
[2] 前記光重合開始剤Bは、チオキサントン系化合物及びアントラキノン系化合物からなる群より選ばれる1以上である、[1]に記載の表示素子シール剤。
[3] 前記光重合開始剤Bと前記4級有機ホウ素アニオンのアンモニウム塩Cの含有質量比が、光重合開始剤B:4級有機ホウ素アニオンのアンモニウム塩C=1:0.1~1:3である、[1]又は[2]に記載の表示素子シール剤。
[4] 前記4級有機ホウ素アニオンのアンモニウム塩Cの含有量は、前記硬化性化合物Aに対して0.01~3質量%である、[1]~[3]のいずれかに記載の表示素子シール剤。
[5] [1]~[4]のいずれかに記載の表示素子シール剤からなる、液晶シール剤。
[6] [5]に記載の液晶シール剤の硬化物。
[7] 液晶シール剤が配置される配線部の開口率が50%以下の液晶表示パネルの液晶層の封止に用いられる、[5]に記載の液晶シール剤。
[8] [5]に記載の液晶シール剤を用いて、一方の基板にシールパターンを形成する工程と、前記シールパターンが未硬化の状態において、前記シールパターンの領域内、又は前記一方の基板と対になる他方の基板に液晶を滴下する工程と、前記一方の基板と前記他方の基板とを、前記シールパターンを介して重ね合わせる工程と、前記シールパターンを硬化させる工程と、を含む、液晶表示パネルの製造方法。
[9] 前記シールパターンを硬化させる工程は、前記シールパターンに光を照射して前記シールパターンを硬化させる工程を含む、[8]に記載の液晶表示パネルの製造方法。
[10] 一対の基板と、前記一対の基板の間に配置された枠状のシール部材と、前記一対の基板の間の前記シール部材で囲まれた空間に充填された液晶層とを含み、前記シール部材が、[5]に記載の液晶シール剤の硬化物である、液晶表示パネル。
[11] 前記シール部材が配置された配線部の開口率が50%以下である、[10]に記載の液晶表示パネル。
本発明の光硬化性樹脂組成物は、硬化性化合物Aと、光重合開始剤Bと、4級有機ホウ素アニオンのアンモニウム塩Cとを含み、必要に応じて熱硬化性化合物Dと、熱硬化剤Eと、その他の成分Fとをさらに含み得る。
本発明の光硬化性樹脂組成物に含まれる硬化性化合物Aは、分子内にエチレン性不飽和二重結合を有する化合物である。分子内にエチレン性不飽和二重結合を有する化合物は、分子内に(メタ)アクリロイル基を有する化合物であることが好ましい。1分子あたりの(メタ)アクリロイル基の数は、1又は2以上である。分子内に(メタ)アクリロイル基を有する化合物は、モノマー、オリゴマー又はポリマーのいずれであってもよい。(メタ)アクリロイル基は、アクリロイル基又はメタクリロイル基を意味し、(メタ)アクリレートは、アクリレート又はメタクリレートを意味する。
本発明の光硬化性樹脂組成物に含まれる光重合開始剤Bは、特に制限されないが、自己開裂型の光重合開始剤であってもよいし、水素引き抜き型の光重合開始剤であってもよい。
(HPLC測定条件)
装置:waters製 Acquity TM UPLC H-Class system
カラム:Acquity UPLC BEH C18、2.1mmID×100mm 粒子径:1.7μm
移動相:A:アセトニトリル
B:5mM酢酸アンモニウム水溶液
A/B = 60/40(0~4分)
95/5(4~9分)
95/5(9~10分)
流速:0.4mL/分
PDA検出器:測定波長:190~500nm
(LC/MS測定条件)
装置:waters製 Acquity TM H-Class system / SQ Detector
カラム:Acquity UPLC BEH C18、2.1mmID×100mm 粒子径:1.7μm
移動相:A:アセトニトリル
B:5mM酢酸アンモニウム水溶液
A/B = 60/40(0~4分)
95/5(4~9分)
95/5(9~10分)
流速:0.4mL/分
イオン化:ESI(エレクトロスプレーイオン化)、正・負イオン測定
PDA検出器:測定波長:190~500nm
1)光硬化性樹脂組成物をテトラヒドロフラン(THF)に溶解させた溶液を、遠心分離機により遠心分離し、シリカ粒子や熱可塑性樹脂粒子等の粒子成分を沈降させる。得られた溶液をフィルターで濾過して粒子成分を除去し、試料液を得る。
2)前記1)で得られた試料液について、高速液体クロマトグラフフィー(HPLC)測定を行う。HPLCの測定方法・条件は、前述の分子量の測定におけるHPLCの測定方法・条件と同様である。
次いで、HPLC測定において、チオキサントン骨格に特徴的な波長400nmの検出器で検出されたメインピークの、ピーク頂点に対応する相対分子質量と組成式を、液体クロマトグラフィー質量分析(LC/MS)により測定する。LC/MSの測定方法・条件は、前述の分子量の測定におけるLC/MSの測定方法・条件と同様である。
3)前記1)で得られた試料液について、NMR測定又はIR測定を行う。それにより、チオキサントン系化合物の化学構造を特定する。
4級有機ホウ素アニオンのアンモニウム塩Cは、光重合開始剤Bを活性化させると共に、それ自身も硬化反応に寄与する増感剤として機能し得る。4級有機ホウ素アニオンのアンモニウム塩Cは、(4n+2)個(nは、0以上の整数)のπ電子を有する環を有することが好ましい。(4n+2)個のπ電子を有する環は、好ましくは芳香族炭化水素環及び芳香族複素環であり、より好ましくは芳香族炭化水素環である。芳香族炭化水素環又は芳香族複素環を含む4級有機ホウ素アニオンのアンモニウム塩Cは、より広い波長領域の光を吸収することが可能であるため活性化されやすい。
熱硬化性化合物Dは、分子内にエポキシ基を有するエポキシ化合物であることが好ましい。但し、熱硬化性化合物Dは、硬化性化合物Aとは異なるものとする。熱硬化性化合物Dは、分子内に(メタ)アクリロイル基を有さないエポキシ化合物であることがより好ましい。エポキシ化合物は、モノマー、オリゴマー又はポリマーのいずれであってもよい。エポキシ化合物は、例えば光硬化性樹脂組成物を液晶シール剤として用いた際に、液晶に対する溶解性や拡散性が低く、得られる液晶パネルの表示特性を良好とするだけでなく、硬化物の耐湿性を高め得る。
熱硬化剤Eは、通常の保存条件下(室温、可視光線下等)では熱硬化性化合物Dを硬化させないが、熱を与えられると当該化合物を硬化させる化合物である。熱硬化剤Eを含有する光硬化性樹脂組成物は、保存安定性に優れ、且つ熱硬化性に優れる。熱硬化剤Eは、エポキシ硬化剤であることが好ましい。
1-6-1.熱可塑性樹脂粒子
本発明の光硬化性樹脂組成物は、必要に応じて熱可塑性樹脂粒子をさらに含んでいてもよい。熱可塑性樹脂粒子は、環球法により測定される軟化点温度が50~120℃、好ましくは70~100℃の熱可塑性樹脂を含み、且つ数平均粒子径が0.05~5μm、好ましくは0.1~3μmであり得る。そのような熱可塑性樹脂粒子を含む光硬化性樹脂組成物は、硬化物に発生する収縮応力を緩和できる。また、数平均粒子径を上限値以下とすることにより、線幅の細いシール部材を形成する際に、熱可塑性樹脂粒子によって、塗工安定性が低下することを防ぐことができる。数平均粒子径は、乾式粒度分布計で測定され得る。
本発明の光硬化性樹脂組成物は、必要に応じて充填剤をさらに含んでいてもよい。充填剤を含む光硬化性樹脂組成物は、粘度や硬化物の強度、及び線膨張性等が良好であり得る。
本発明の光硬化性樹脂組成物の、E型粘度計の25℃、2.5rpmにおける粘度は、200~450Pa・sであることが好ましく、300~400Pa・sであることがより好ましい。粘度が上記範囲にあると、光硬化性樹脂組成物のディスペンサ-による塗布性が良好となる。
本発明の表示素子パネルは、一対の基板と、該一対の基板の間に配置される表示素子と、該表示素子を封止するシール部材とを含む。シール部材を、本発明の表示素子シール剤の硬化物とし得る。本発明の表示素子シール剤は、本発明の光硬化性樹脂組成物からなる。
配線部の開口率(%)=シール部材が配置される領域の配線部の開口部の面積/シール部材が配置される領域の配線部の面積×100(%)
配線部とは、(液晶表示パネルの外周部において)配線が形成されている領域のことであり、配線部の面積とは、開口部の面積と遮光部の面積の和となる。
1)一方の基板に、本発明の液晶シール剤のシールパターンを形成する工程と、
2)シールパターンが未硬化の状態において、基板のシールパターンで囲まれた領域内、又はシールパターンで囲まれた領域に対向する他方の基板の領域に、液晶を滴下する工程と、
3)一方の基板と他方の基板とをシールパターンを介して重ね合わせる工程と、
4)シールパターンを硬化させる工程とを含む。
また、液晶表示パネルの高精細化、即ち画素数の増加による配線の高密度化が進んでおり、それに伴い、液晶シール剤が配置される配線部の開口率が低下する(遮光部が増える)傾向にある。
(硬化性化合物A)
A-1:合成例1で得られたメタアクリル酸変性ビスフェノールF型エポキシ樹脂(95%部分メタアクリル化物)
(合成例1)
160gの液状ビスフェノールF型エポキシ樹脂(YDF-8170C、新日鉄住金化学社製、エポキシ当量160g/eq)、重合禁止剤として0.1gのp-メトキシフェノール、触媒として0.2gのトリエタノールアミン、及び81.7gのメタアクリル酸をフラスコ内に仕込み、乾燥空気を送り込んで90℃で還流攪拌しながら5時間反応させた。得られた化合物を、超純水にて20回洗浄し、メタアクリル酸変性ビスフェノールF型エポキシ樹脂(硬化性化合物A-1)を得た。この樹脂をGPC分析した結果、重量平均分子量は792であった。
(合成例2)
先ず、攪拌機、気体導入管、温度計、冷却管を備えた500mlの四つ口フラスコにビスフェノールF型エポキシ樹脂(YDF-8170C、新日鉄住金化学社製、エポキシ当量160g/eq)を175g、アクリル酸:37g、触媒としてトリエタノールアミン:0.2g、重合禁止剤としてヒドロキノンモノメチルエーテル:0.2gを混合し、乾燥空気を吹き込みながら、110℃、12時間加熱攪拌した。得られた反応生成物を、超純水にて12回洗浄処理を繰り返し、アクリル酸変性ビスフェノールF型エポキシ樹脂(硬化性化合物A-2)を得た。
この樹脂をHPLC、NMRで分析した結果、エポキシ基の50%がアクリロイル酸変性されたビスフェノールF型エポキシ樹脂であった。また、この樹脂をGPC分析した結果、重量平均分子量は692であった。
Omnipol-TX、IGM Resins社製(下記式参照、チオキサントン系化合物)
エポキシ樹脂:三菱化学社製、jER樹脂1004、軟化点97℃
アジピン酸ジヒドラジド:日本化成社製、ADH、融点177~184℃
シリカ粒子:(株)日本触媒化学社製、S-100
熱可塑性樹脂粒子:アイカ工業社製、F351、軟化点120℃、平均粒子径0.3μm
γ-グリシドキシプロピルトリメトキシシラン:信越化学工業社製、KBM-403
硬化性化合物Aとして合成例1で得られた硬化性化合物A-1を420質量部と、ポリエチレングリコールジアクリレート(共栄社化学製、ライトアクリレート14EG-A)を200質量部と、光重合開始剤BとしてOmnipol-TX(IGM Resins社製)を10質量部と、4級有機ホウ素アニオンのアンモニウム塩CとしてP3B(昭和電工社製)を10質量部と、熱硬化性化合物Dとしてエポキシ樹脂(三菱化学社製、jER樹脂1004)を50質量部と、熱硬化剤Eとしてアジピン酸ジヒドラジド(日本化成社製ADH)を90質量部と、充填剤としてシリカ粒子(日本触媒化学社製、S-100)を130質量部と、熱可塑性樹脂粒子としてF351(アイカ工業社製)を70質量部と、シランカップリング剤としてγ-グリシドキシプロピルトリメトキシシラン(信越化学工業社製、KBM-403)を20質量部とを、三本ロールミルを用いて均一な液となるように十分に混合して、光硬化性樹脂組成物を得た。
表1又は2に示される組成に変更した以外は実施例1と同様にして光硬化性樹脂組成物を得た。
光重合性組成物に波長360~430nmの光を1mW/cm2で30秒間照射した際の、25℃における粘度上昇挙動を、VISCOANALYSER VAR100(REOLOGICA INSTRUMENT社製)を用いて観測した。このとき、光照射後の光重合性組成物の粘度が、飽和粘度値に対して50%の値となるまでの硬化時間を測定した。飽和粘度値とは、光重合性組成物を完全硬化させたときの粘度である。硬化時間が短い程、硬化性に優れると判断できる。
ガラス基板上に200μm幅のブラックマトリクスを100μm幅間隔で5本形成した基板1と、ガラス基板の全面にブラックマトリクスを形成した基板2とを作製した。基板1には光重合性樹脂組成物を、基板1と基板2の貼り合わせ後の塗布領域が、ブラックマトリクスの長手方向と直交する長方形状となるように、且つ硬化後の厚みが5μmとなるように塗布した。塗布領域は、ブラックマトリクスの長手方向と直交する方向(長辺)の長さが1500μm、ブラックマトリクスの長手方向と平行方向(短辺)の長さが600~800μmの長方形状とした。一方、基板2には離形剤を塗布した。
これらの基板を、それぞれの塗布面が重なるように貼り合わせた後、基板1側から波長400~480nmの光を100mW/cm2で20秒間照射して積層パネルを得た。積層パネルのうち、液晶シール剤が配置される領域の開口率は、33.3%であった。
次いで、積層パネルから基板1を剥がした。得られた基板1の各200μm幅ブラックマトリクス部分を光学顕微鏡で観察し、光重合性樹脂組成物の未硬化幅と硬化幅をそれぞれ測定し、5本の平均値を求めた。硬化しているかどうかは、光学顕微鏡での観察により判断した。未硬化幅は小さいほど、硬化幅は大きいほど、硬化性に優れると判断できる。
尚、各ブラックマトリクス部分での光重合性樹脂組成物の未硬化部分は、ブラックマトリクスの幅方向の中央部にあり;硬化部分は、ブラックマトリクスの幅方向の両端部にある。表中の硬化幅は、ブラックマトリクスの幅方向の両端部にある2つの硬化部のそれぞれの幅を示している。
Claims (11)
- 分子内にエチレン性不飽和二重結合を有する硬化性化合物Aと、
光重合開始剤Bと、
下記式(1)で表される4級有機ホウ素アニオンのアンモニウム塩Cとを含む、表示素子シール剤。
R1~R4は、置換されていてもよいアルキル基、置換されていてもよいアルケニル基、置換されていてもよいアルキニル基、置換されていてもよいシクロアルキル基、置換されていてもよいアラルキル基、置換されていてもよいアリール基又は置換されていてもよいヘテロアリール基であり、それぞれ同一であっても異なってもよく、且つ
R1~R4の少なくとも一つは、置換されていてもよいアリール基又は置換されていてもよいヘテロアリール基であり、
Z+は、アンモニウムカチオンである) - 前記光重合開始剤Bは、チオキサントン系化合物及びアントラキノン系化合物からなる群より選ばれる1以上である、請求項1に記載の表示素子シール剤。
- 前記光重合開始剤Bと前記4級有機ホウ素アニオンのアンモニウム塩Cの含有質量比が、光重合開始剤B:4級有機ホウ素アニオンのアンモニウム塩C=1:0.1~1:3である、請求項1に記載の表示素子シール剤。
- 前記4級有機ホウ素アニオンのアンモニウム塩Cの含有量は、前記硬化性化合物Aに対して0.01~3質量%である、請求項1に記載の表示素子シール剤。
- 請求項1~4のいずれか一項に記載の表示素子シール剤からなる、液晶シール剤。
- 請求項5に記載の液晶シール剤の硬化物。
- 前記液晶シール剤が配置される配線部の開口率が50%以下の液晶表示パネルの液晶層の封止に用いられる、請求項5に記載の液晶シール剤。
- 請求項5に記載の液晶シール剤を用いて、一方の基板にシールパターンを形成する工程と、
前記シールパターンが未硬化の状態において、前記シールパターンの領域内、又は前記一方の基板と対になる他方の基板に液晶を滴下する工程と、
前記一方の基板と前記他方の基板とを、前記シールパターンを介して重ね合わせる工程と、
前記シールパターンを硬化させる工程と、を含む、液晶表示パネルの製造方法。 - 前記シールパターンを硬化させる工程は、前記シールパターンに光を照射して前記シールパターンを硬化させる工程を含む、請求項8に記載の液晶表示パネルの製造方法。
- 一対の基板と、
前記一対の基板の間に配置された枠状のシール部材と、
前記一対の基板の間の前記シール部材で囲まれた空間に充填された液晶層とを含み、
前記シール部材が、請求項5に記載の液晶シール剤の硬化物である、液晶表示パネル。 - 前記シール部材が配置された配線部の開口率が50%以下である、請求項10に記載の液晶表示パネル。
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