JP6238761B2 - Liquid crystal sealant and liquid crystal display cell using the same - Google Patents
Liquid crystal sealant and liquid crystal display cell using the same Download PDFInfo
- Publication number
- JP6238761B2 JP6238761B2 JP2014007379A JP2014007379A JP6238761B2 JP 6238761 B2 JP6238761 B2 JP 6238761B2 JP 2014007379 A JP2014007379 A JP 2014007379A JP 2014007379 A JP2014007379 A JP 2014007379A JP 6238761 B2 JP6238761 B2 JP 6238761B2
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- Japan
- Prior art keywords
- liquid crystal
- filler
- sealant
- dropping method
- mass
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000004973 liquid crystal related substance Substances 0.000 title claims description 215
- 239000000565 sealant Substances 0.000 title claims description 50
- 238000000034 method Methods 0.000 claims description 71
- 239000003795 chemical substances by application Substances 0.000 claims description 65
- 239000000945 filler Substances 0.000 claims description 57
- 238000007789 sealing Methods 0.000 claims description 56
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- 239000003822 epoxy resin Substances 0.000 claims description 40
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- 239000002245 particle Substances 0.000 claims description 27
- 239000000758 substrate Substances 0.000 claims description 19
- 229920001971 elastomer Polymers 0.000 claims description 18
- 238000004519 manufacturing process Methods 0.000 claims description 18
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 15
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 claims description 12
- 239000007870 radical polymerization initiator Substances 0.000 claims description 12
- 239000012766 organic filler Substances 0.000 claims description 11
- 229920000800 acrylic rubber Polymers 0.000 claims description 10
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- 239000010419 fine particle Substances 0.000 claims description 9
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- 229910001868 water Inorganic materials 0.000 description 5
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
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- IJOOHPMOJXWVHK-UHFFFAOYSA-N chlorotrimethylsilane Chemical compound C[Si](C)(C)Cl IJOOHPMOJXWVHK-UHFFFAOYSA-N 0.000 description 4
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- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 4
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- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000003999 initiator Substances 0.000 description 4
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- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 235000012239 silicon dioxide Nutrition 0.000 description 4
- ZNGSVRYVWHOWLX-KHFUBBAMSA-N (1r,2s)-2-(methylamino)-1-phenylpropan-1-ol;hydrate Chemical compound O.CN[C@@H](C)[C@H](O)C1=CC=CC=C1.CN[C@@H](C)[C@H](O)C1=CC=CC=C1 ZNGSVRYVWHOWLX-KHFUBBAMSA-N 0.000 description 3
- FZFFWZJDHRTEMQ-UHFFFAOYSA-N 1,1,2,2-tetraphenyl-2-trimethylsilyloxyethanol Chemical compound OC(C(C1=CC=CC=C1)(C1=CC=CC=C1)O[Si](C)(C)C)(C1=CC=CC=C1)C1=CC=CC=C1 FZFFWZJDHRTEMQ-UHFFFAOYSA-N 0.000 description 3
- QCBSYPYHCJMQGB-UHFFFAOYSA-N 2-ethyl-1,3,5-triazine Chemical compound CCC1=NC=NC=N1 QCBSYPYHCJMQGB-UHFFFAOYSA-N 0.000 description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 3
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 229930192627 Naphthoquinone Natural products 0.000 description 3
- GHMLBKRAJCXXBS-UHFFFAOYSA-N Resorcinol Natural products OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910002026 crystalline silica Inorganic materials 0.000 description 3
- ZWLIYXJBOIDXLL-UHFFFAOYSA-N decanedihydrazide Chemical compound NNC(=O)CCCCCCCCC(=O)NN ZWLIYXJBOIDXLL-UHFFFAOYSA-N 0.000 description 3
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- 239000011737 fluorine Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- XZBIXDPGRMLSTC-UHFFFAOYSA-N formohydrazide Chemical compound NNC=O XZBIXDPGRMLSTC-UHFFFAOYSA-N 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- DNXDYHALMANNEJ-UHFFFAOYSA-N furan-2,3-dicarboxylic acid Chemical compound OC(=O)C=1C=COC=1C(O)=O DNXDYHALMANNEJ-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- OXAGUPFRAIIDLT-UHFFFAOYSA-N heptanedihydrazide Chemical compound NNC(=O)CCCCCC(=O)NN OXAGUPFRAIIDLT-UHFFFAOYSA-N 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 229920002681 hypalon Polymers 0.000 description 1
- NBZBKCUXIYYUSX-UHFFFAOYSA-N iminodiacetic acid Chemical compound OC(=O)CNCC(O)=O NBZBKCUXIYYUSX-UHFFFAOYSA-N 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007774 longterm Effects 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
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 125000005641 methacryl group Chemical group 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- RBQRWNWVPQDTJJ-UHFFFAOYSA-N methacryloyloxyethyl isocyanate Chemical compound CC(=C)C(=O)OCCN=C=O RBQRWNWVPQDTJJ-UHFFFAOYSA-N 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 description 1
- IFZUFHWISBKFJP-UHFFFAOYSA-N n'-[4-[dimethoxy(methyl)silyl]oxybutyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)OCCCCNCCN IFZUFHWISBKFJP-UHFFFAOYSA-N 0.000 description 1
- KBJFYLLAMSZSOG-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)aniline Chemical compound CO[Si](OC)(OC)CCCNC1=CC=CC=C1 KBJFYLLAMSZSOG-UHFFFAOYSA-N 0.000 description 1
- DRRZZMBHJXLZRS-UHFFFAOYSA-N n-[3-[dimethoxy(methyl)silyl]propyl]cyclohexanamine Chemical compound CO[Si](C)(OC)CCCNC1CCCCC1 DRRZZMBHJXLZRS-UHFFFAOYSA-N 0.000 description 1
- VMFUMDXVTKTZQY-UHFFFAOYSA-N naphthalene-1-carbohydrazide Chemical compound C1=CC=C2C(C(=O)NN)=CC=CC2=C1 VMFUMDXVTKTZQY-UHFFFAOYSA-N 0.000 description 1
- 125000000018 nitroso group Chemical group N(=O)* 0.000 description 1
- FPLYNRPOIZEADP-UHFFFAOYSA-N octylsilane Chemical compound CCCCCCCC[SiH3] FPLYNRPOIZEADP-UHFFFAOYSA-N 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 125000001181 organosilyl group Chemical group [SiH3]* 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- LGYJSPMYALQHBL-UHFFFAOYSA-N pentanedihydrazide Chemical compound NNC(=O)CCCC(=O)NN LGYJSPMYALQHBL-UHFFFAOYSA-N 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 235000011007 phosphoric acid Nutrition 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002742 polystyrene-block-poly(ethylene/propylene) -block-polystyrene Polymers 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000011164 primary particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- DDOVHJODVHQLCS-UHFFFAOYSA-N pyridine-2,6-dicarbohydrazide Chemical compound NNC(=O)C1=CC=CC(C(=O)NN)=N1 DDOVHJODVHQLCS-UHFFFAOYSA-N 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 229960001755 resorcinol Drugs 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000012321 sodium triacetoxyborohydride Substances 0.000 description 1
- 125000004079 stearyl 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])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])[H] 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- UTADZBVVSYSYTG-UHFFFAOYSA-N tert-butyl(methyl)silane Chemical compound C[SiH2]C(C)(C)C UTADZBVVSYSYTG-UHFFFAOYSA-N 0.000 description 1
- WRWQRNWWCINRPO-UHFFFAOYSA-N tert-butyl-[2-[tert-butyl(dimethyl)silyl]oxy-1,1,2,2-tetraphenylethoxy]-dimethylsilane Chemical compound C(C)(C)(C)[Si](OC(C(C1=CC=CC=C1)(C1=CC=CC=C1)O[Si](C)(C)C(C)(C)C)(C1=CC=CC=C1)C1=CC=CC=C1)(C)C WRWQRNWWCINRPO-UHFFFAOYSA-N 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 235000019303 thiodipropionic acid Nutrition 0.000 description 1
- JREYOWJEWZVAOR-UHFFFAOYSA-N triazanium;[3-methylbut-3-enoxy(oxido)phosphoryl] phosphate Chemical compound [NH4+].[NH4+].[NH4+].CC(=C)CCOP([O-])(=O)OP([O-])([O-])=O JREYOWJEWZVAOR-UHFFFAOYSA-N 0.000 description 1
- MPQVYFJXQMBTHQ-UHFFFAOYSA-N triethyl-(1,1,2,2-tetraphenyl-2-triethylsilyloxyethoxy)silane Chemical compound C(C)[Si](OC(C(C1=CC=CC=C1)(C1=CC=CC=C1)O[Si](CC)(CC)CC)(C1=CC=CC=C1)C1=CC=CC=C1)(CC)CC MPQVYFJXQMBTHQ-UHFFFAOYSA-N 0.000 description 1
- DQZNLOXENNXVAD-UHFFFAOYSA-N trimethoxy-[2-(7-oxabicyclo[4.1.0]heptan-4-yl)ethyl]silane Chemical compound C1C(CC[Si](OC)(OC)OC)CCC2OC21 DQZNLOXENNXVAD-UHFFFAOYSA-N 0.000 description 1
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 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
-
- 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
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
-
- 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
- C08K5/22—Compounds containing nitrogen bound to another nitrogen atom
- C08K5/24—Derivatives of hydrazine
-
- 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
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
-
- 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
- C08K7/00—Use of ingredients characterised by shape
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Sealing Material Composition (AREA)
- Liquid Crystal (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
本発明は、液晶滴下工法に使用される液晶シール剤に関する。より詳細には、フィラーの凝集を無くし、該フィラーが高分散された液晶滴下工法用液晶シール剤に関する。この液晶滴下工法用液晶シール剤は、フィラーの凝集物が無い為、ディスペンスやスクリーン印刷といった塗布作業性に優れ、また液晶表示セルのセルギャップ不良を引き起こさない液晶シール剤である。 The present invention relates to a liquid crystal sealing agent used in a liquid crystal dropping method. More specifically, the present invention relates to a liquid crystal sealing agent for a liquid crystal dropping method in which filler aggregation is eliminated and the filler is highly dispersed. The liquid crystal sealing agent for the liquid crystal dropping method is a liquid crystal sealing agent that is excellent in coating workability such as dispensing and screen printing and does not cause a cell gap defect of a liquid crystal display cell because there is no aggregate of filler.
近年の液晶表示セルの大型化に伴い、液晶表示セルの製造法として、より量産性の高い、いわゆる液晶滴下工法が提案されていた（特許文献１、特許文献２）。具体的には、一方の基板に形成された液晶シール剤の堰の内側に液晶を滴下した後、もう一方の基板を貼り合わせ、その後液晶シール剤を硬化する液晶表示セルの製造方法である。 Along with the recent increase in size of liquid crystal display cells, a so-called liquid crystal dropping method with higher mass productivity has been proposed as a method for manufacturing liquid crystal display cells (Patent Document 1 and Patent Document 2). Specifically, it is a method of manufacturing a liquid crystal display cell in which liquid crystal is dropped inside a weir of a liquid crystal sealant formed on one substrate, the other substrate is bonded, and then the liquid crystal sealant is cured.
しかし、液晶滴下工法では、液晶シール剤が硬化する前に、液晶と液晶シール剤が接触する為、液晶による圧力によって液晶シール剤に差込現象が発生し、また決壊してしまうこともあり、問題とされている。この問題は、光と熱を併用する液晶滴下工法においても配線等の影になって充分な紫外線が照射されない部分が存在する液晶表示セルの製造では問題である。また、紫外線照射を行わず、熱のみで液晶シール剤を硬化する方法の液晶滴下工法においては、特に大きな問題である。 However, in the liquid crystal dropping method, before the liquid crystal sealant is cured, the liquid crystal and the liquid crystal sealant come into contact with each other. It has been a problem. This problem is also a problem in the production of a liquid crystal display cell in which there is a portion that is shaded by wiring or the like and is not irradiated with sufficient ultraviolet rays even in a liquid crystal dropping method using both light and heat. In addition, this is a particularly serious problem in the liquid crystal dropping method in which the liquid crystal sealant is cured only by heat without performing ultraviolet irradiation.
この液晶滴下工法に用いられる液晶シール剤には、上記課題を解決する為に、フィラーの添加に関する工夫が提案されている（特許文献３、特許文献４）。
しかし、一般的にフィラーは粒子同士が凝集し易く、一次粒子の状態で使用することは困難である。すなわち、凝集物（粗大粒子）が液晶シール剤中に存在することになり、ディスペンス時のノズル詰まり、スクリーン印刷時の版の目詰まり等、塗布工程における不具合を発生させる。
In order to solve the above problems, a device for adding a filler has been proposed for the liquid crystal sealant used in this liquid crystal dropping method (Patent Documents 3 and 4).
However, generally fillers are easy to aggregate particles, and it is difficult to use them in the form of primary particles. That is, agglomerates (coarse particles) are present in the liquid crystal sealant, causing problems in the coating process such as nozzle clogging during dispensing and plate clogging during screen printing.
また、液晶表示セルの製造工程で、上下基板を貼り合わせる際、液晶シール剤中の凝集物は、セルギャップ不良（所望のセルギャップまで液晶シール剤が潰れない不良）を発生させる。
本発明は、フィラーを含有する液晶滴下工法用液晶シール剤であって、上記した課題を解決するものである。
Further, when the upper and lower substrates are bonded together in the manufacturing process of the liquid crystal display cell, the aggregate in the liquid crystal sealing agent generates a cell gap defect (a defect in which the liquid crystal sealing agent does not collapse until a desired cell gap).
The present invention is a liquid crystal sealant for a liquid crystal dropping method containing a filler, and solves the above-described problems.
本発明は、液晶滴下工法に使用される液晶シール剤に関し、より詳細には、フィラーの凝集を無くし、該フィラーが高分散された液晶滴下工法用液晶シール剤を提案するものである。この液晶滴下工法用液晶シール剤は、フィラーの凝集物が無い為、ディスペンスやスクリーン印刷といった塗布作業性に優れ、また液晶表示セルのセルギャップ不良を引き起こさない液晶シール剤である。
また、フィラーの凝集を無くすことによって、該フィラーのもつ特性を最大限に引き出すことが可能である。例えば、フィラー自身が、液晶の差し込みへの耐性をもつ場合があるが、この効果もより高いレベルで実現することが可能である。
The present invention relates to a liquid crystal sealing agent used in a liquid crystal dropping method, and more specifically, proposes a liquid crystal sealing agent for a liquid crystal dropping method in which filler aggregation is eliminated and the filler is highly dispersed. The liquid crystal sealing agent for the liquid crystal dropping method is a liquid crystal sealing agent that is excellent in coating workability such as dispensing and screen printing and does not cause a cell gap defect of a liquid crystal display cell because there is no aggregate of filler.
Further, by eliminating filler aggregation, it is possible to maximize the properties of the filler. For example, the filler itself may have resistance to liquid crystal insertion, but this effect can also be realized at a higher level.
本発明者らは、鋭意検討の結果、平均粒子径の大きく異なる２種のフィラーを用いることによって、フィラーの凝集を解砕する効果が発現することを見出し、本発明に至ったものである。
なお、本明細書中、「（メタ）アクリル」とは「アクリル及び／又はメタクリル」を意味し、「（メタ）アクリロイル基」とは「アクリロイル基及び/又はメタクリロイル基」を意味する。また、「液晶滴下工法用液晶シール剤」を単に「液晶シール剤」と記載する場合もある。
As a result of intensive studies, the present inventors have found that the use of two types of fillers having greatly different average particle diameters reveals the effect of crushing the aggregation of fillers, leading to the present invention.
In the present specification, “(meth) acryl” means “acryl and / or methacryl”, and “(meth) acryloyl group” means “acryloyl group and / or methacryloyl group”. Further, “liquid crystal sealing agent for liquid crystal dropping method” may be simply referred to as “liquid crystal sealing agent”.
すなわち本発明は、
１）
平均粒子径Ａ[μｍ]のフィラー（ａ）、平均粒子径Ｂ[μｍ]のフィラー（ｂ）及び硬化性化合物（ｃ）を含有し、
Ａ[μｍ]及びＢ[μｍ]が、下記式（Ｉ）及び（ＩＩ）で表される条件を満たす液晶滴下工法用液晶シール剤。
３μｍ ≦ Ａ ≦ ２０μｍ ・・・ （Ｉ）
０．０００５×Ａ ≦ Ｂ ≦ ０．０２×Ａ ・・・ （ＩＩ）
２）
上記（ａ）が、有機フィラーである上記１）に記載の液晶滴下工法用液晶シール剤、
３）
上記（ｂ）が、シリカ及び／又はアルミナである上記１）又は２）に記載の液晶滴下工法用液晶シール剤、
４）
上記（ａ）が疎水性フィラーであり、上記（ｂ）が親水性フィラーである上記１）乃至３）のいずれか一項に記載の液晶滴下工法用液晶シール剤、
５）
上記（ａ）が、ウレタンゴム、アクリルゴム、スチレンゴム、スチレンオレフィンゴム、及びシリコーンゴムからなる群より選択される１又は２以上のゴム微粒子である上記１）乃至４）のいずれか一項に記載の液晶滴下工法用液晶シール剤、
６）
液晶シール剤の総量を１００質量部としたときの（ａ）の含有量が５質量部以上５０質量部未満である上記１）乃至５）のいずれか一項に記載の液晶滴下工法用液晶シール剤、
７）
液晶シール剤の総量を１００質量部としたときの（ｂ）の含有量が１質量部以上２０質量部未満である上記１）乃至６）のいずれか一項に記載の液晶滴下工法用液晶シール剤、
８）
上記硬化性化合物（ｃ）が（メタ）アクリル化エポキシ樹脂であり、更に熱硬化剤（ｄ）を含有する上記１）乃至７）のいずれか一項に記載の液晶滴下工法用液晶シール剤。
９）
上記硬化性化合物（ｃ）がレゾルシンジグリシジルエーテルの（メタ）アクリルエステル化物である上記１）乃至８）のいずれか一項に記載の液晶滴下工法用液晶シール剤、
１０）
上記熱硬化剤（ｄ）が有機酸ヒドラジド化合物である上記８）に記載の液晶滴下工法用液晶シール剤、
１１）
更に熱ラジカル重合開始剤（ｅ）を含有する上記１）乃至１０）のいずれか一項に記載の液晶滴下工法用液晶シール剤、
１２）
更にシランカップリング剤（ｆ）を含有する、上記１）乃至１１）のいずれか一項に記載の液晶滴下工法用液晶シール剤、
１３）
更にエポキシ樹脂（ｇ）を含有する、上記１）乃至１２）のいずれか一項に記載の液晶滴下工法用液晶シール剤、
１４）
２枚の基板により構成される液晶表示セルにおいて、一方の基板に形成された上記１）乃至１３）のいずれか一項に記載の液晶滴下工法用液晶シール剤の堰の内側に液晶を滴下した後、もう一方の基板を貼り合わせ、その後熱により硬化することを特徴とする液晶表示セルの製造方法、
１５）
上記１）乃至１３）のいずれか一項に記載の液晶滴下工法用液晶シール剤を硬化して得られる硬化物でシールされた液晶表示セル、
に関する。
That is, the present invention
1)
Containing a filler (a) having an average particle size A [μm], a filler (b) having an average particle size B [μm], and a curable compound (c),
A liquid crystal sealant for a liquid crystal dropping method in which A [μm] and B [μm] satisfy the conditions represented by the following formulas (I) and (II).
3 μm ≦ A ≦ 20 μm (I)
0.0005 × A ≦ B ≦ 0.02 × A (II)
2)
The liquid crystal sealing agent for liquid crystal dropping method according to the above 1), wherein (a) is an organic filler,
3)
The liquid crystal sealing agent for a liquid crystal dropping method according to the above 1) or 2), wherein (b) is silica and / or alumina,
4)
The liquid crystal sealing agent for a liquid crystal dropping method according to any one of 1) to 3), wherein (a) is a hydrophobic filler, and (b) is a hydrophilic filler,
5)
In any one of the above items 1) to 4), (a) is one or more rubber fine particles selected from the group consisting of urethane rubber, acrylic rubber, styrene rubber, styrene olefin rubber, and silicone rubber. Liquid crystal sealing agent for liquid crystal dropping method as described,
6)
The liquid crystal seal for a liquid crystal dropping method according to any one of 1) to 5) above, wherein the content of (a) is 5 parts by mass or more and less than 50 parts by mass when the total amount of the liquid crystal sealant is 100 parts by mass. Agent,
7)
The liquid crystal seal for a liquid crystal dropping method according to any one of 1) to 6) above, wherein the content of (b) is 1 part by mass or more and less than 20 parts by mass when the total amount of the liquid crystal sealant is 100 parts by mass. Agent,
8)
The liquid crystal sealing agent for a liquid crystal dropping method according to any one of 1) to 7), wherein the curable compound (c) is a (meth) acrylated epoxy resin and further contains a thermosetting agent (d).
9)
Liquid crystal sealing agent for liquid crystal dropping method according to any one of 1) to 8), wherein the curable compound (c) is a (meth) acrylic esterified product of resorcin diglycidyl ether,
10)
The liquid crystal sealing agent for liquid crystal dropping method according to 8) above, wherein the thermosetting agent (d) is an organic acid hydrazide compound,
11)
Furthermore, the liquid-crystal sealing compound for liquid crystal dropping methods as described in any one of said 1) thru | or 10) containing a thermal radical polymerization initiator (e),
12)
Furthermore, the liquid-crystal sealing compound for liquid crystal dropping methods as described in any one of said 1) thru | or 11) containing a silane coupling agent (f),
13)
Furthermore, the liquid-crystal sealing compound for liquid crystal dropping methods as described in any one of said 1) thru | or 12) containing an epoxy resin (g),
14)
In a liquid crystal display cell composed of two substrates, the liquid crystal was dropped inside the liquid crystal sealing agent weir of the liquid crystal dropping method according to any one of 1) to 13) formed on one substrate. Thereafter, the other substrate is bonded, and then cured by heat, a method for producing a liquid crystal display cell,
15)
A liquid crystal display cell sealed with a cured product obtained by curing the liquid crystal sealing agent for a liquid crystal dropping method according to any one of 1) to 13) above;
About.
本発明の液晶シール剤は、フィラーの凝集物が無い為、ディスペンスやスクリーン印刷といった塗布作業性に優れ、また液晶表示セルのセルギャップ不良を引き起こさない液晶シール剤である。従って、液晶表示セルの製造工程における様々な課題を解決するものである。 The liquid crystal sealant of the present invention is a liquid crystal sealant that is excellent in coating workability such as dispensing and screen printing and does not cause a cell gap defect of a liquid crystal display cell because there is no filler aggregate. Therefore, various problems in the manufacturing process of the liquid crystal display cell are solved.
本発明の液晶シール剤は、平均粒子径Ａ[μｍ]のフィラー（ａ）、平均粒子径Ｂ[μｍ]のフィラー（ｂ）を含有し、Ａ[μｍ]及びＢ[μｍ]が、下記数式（Ｉ）、（ＩＩ）で表される条件を満たすことを特徴とする。
３μｍ ≦ Ａ ≦ ２０μｍ ・・・ （Ｉ）
０．０００５×Ａ ≦ Ｂ ≦ ０．０２×Ａ ・・・ （ＩＩ）
[数式（Ｉ）に関して]
数式（Ｉ）は、平均粒子径の大きいフィラー（ａ）の、平均粒子径を規定している。すなわち、フィラー（ａ）の平均粒子径は、３μｍ以上２０μｍ以下である。フィラー平均粒子径が小さいと、その凝集力が高くなる傾向がある。従って、３μｍ未満である場合、本発明の効果が十分に得られない場合がある。また、フィラーの平均粒子径が大きすぎると、凝集していなくても、液晶表示セルの製造には不向きとなる。平均粒子径の更に好ましい範囲は、３μｍ以上１５μｍ以下であり、特に好ましくは、４μｍ以上１０μｍ以下である。
[数式（ＩＩ）に関して]
数式（ＩＩ）は、フィラー（ａ）とフィラー（ｂ）の平均粒子径の関係を示したものである。すなわち、フィラー（ｂ）の平均粒子径は、フィラー（ａ）の平均粒子径の２０００分の１以上１０００分の２０以下である。フィラー（ｂ）の平均粒子径がこの範囲である場合には、フィラー（ａ）の粒子とフィラー（ａ）の粒子の間に効率良く入り込み、フィラー（ａ）の分散性を高める効果を発現する。また、フィラー（ａ）が有機フィラーの場合には、外的応力によって形状が変形することがあるが、フィラー（ｂ）が上記範囲であれば、その変形に追従することが可能であって、フィラー（ａ）から剥離することもない。フィラー（ｂ）の平均粒子径は、更に好ましくは、１０００分の２以上１０００分の１５以下であり、特に好ましくは、１０００分の５以上１０００分の１０以下である。
The liquid crystal sealant of the present invention contains a filler (a) having an average particle diameter A [μm] and a filler (b) having an average particle diameter B [μm], and A [μm] and B [μm] are expressed by the following formulas: The conditions represented by (I) and (II) are satisfied.
3 μm ≦ A ≦ 20 μm (I)
0.0005 × A ≦ B ≦ 0.02 × A (II)
[Regarding Formula (I)]
Formula (I) defines the average particle size of the filler (a) having a large average particle size. That is, the average particle diameter of the filler (a) is 3 μm or more and 20 μm or less. When the filler average particle size is small, the cohesive force tends to increase. Therefore, when it is less than 3 μm, the effect of the present invention may not be sufficiently obtained. On the other hand, if the average particle size of the filler is too large, it becomes unsuitable for the production of a liquid crystal display cell even if it does not aggregate. A more preferable range of the average particle diameter is 3 μm or more and 15 μm or less, and particularly preferably 4 μm or more and 10 μm or less.
[Regarding Formula (II)]
Formula (II) shows the relationship between the average particle diameters of the filler (a) and the filler (b). That is, the average particle diameter of the filler (b) is 1/2000 to 20/1000 of the average particle diameter of the filler (a). When the average particle diameter of the filler (b) is within this range, the filler (a) and the filler (a) are efficiently inserted between the filler (a) and the filler (a). . Further, when the filler (a) is an organic filler, the shape may be deformed by an external stress, but if the filler (b) is in the above range, the deformation can be followed, It does not peel from the filler (a). The average particle diameter of the filler (b) is more preferably 2/1000 to 15/1000, and particularly preferably 5/1000 to 10/1000.
本明細書において平均粒子径は、粒径はレーザー回折・散乱式粒度分布測定器（乾式）（株式会社セイシン企業製；ＬＭＳ−３０）等により測定することができる。また、市販品であれば、各社カタログにも明記されている。 In this specification, the average particle diameter can be measured by a laser diffraction / scattering particle size distribution analyzer (dry type) (manufactured by Seishin Enterprise Co., Ltd .; LMS-30). If it is a commercial product, it is also specified in the catalog of each company.
上記フィラー（ａ）は、有機フィラー及び／又は無機フィラーを意味する。
有機フィラーとしては、例えばナイロン６、ナイロン１２、ナイロン６６等のポリアミド微粒子、テトラフルオロエチレン、フッ化ビニリデン等のフッ素系微粒子、ポリエチレン、ポリプロピレン等のオレフィン系微粒子、ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系微粒子、天然ゴム、イソプレンゴム、アクリルゴム等のゴム微粒子等が挙げられる。このうち好ましいものはゴム微粒子であって、例えば天然ゴム（ＮＲ）、イソプレンゴム（ＩＲ）、ブタジエンゴム（ＢＲ）、スチレン・ブタジエンゴム（ＳＢＲ）、ブチルゴム（ＩＩＲ）、二トリルゴム（ＮＢＲ）、エチレン・プロピレンゴム( ＥＰＭ、ＥＰ）、クロロプレンゴム（ＣＲ）、アクリルゴム（ＡＣＭ、ＡＮＭ）、クロロスルホン化ポリエチレンゴム（ＣＳＭ）、ウレタンゴム（ＰＵＲ）、シリコーンゴム（ＳＩ、ＳＲ）、フッ素ゴム（ＦＫＭ、ＦＰＭ）、多硫化ゴム（チオコール）などが挙げられる。これら固形成分（Ｉ）は２種以上を混合して用いても良い。これらのうち、好ましくは、シリコーンゴム、スチレンゴム、スチレンオレフィンゴム、アクリルゴムである。
The filler (a) means an organic filler and / or an inorganic filler.
Examples of the organic filler include polyamide fine particles such as nylon 6, nylon 12 and nylon 66, fluorine fine particles such as tetrafluoroethylene and vinylidene fluoride, olefin fine particles such as polyethylene and polypropylene, polyester such as polyethylene terephthalate and polyethylene naphthalate. Rubber fine particles such as system fine particles, natural rubber, isoprene rubber, and acrylic rubber. Among these, preferred are rubber fine particles such as natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene rubber (SBR), butyl rubber (IIR), nitrile rubber (NBR), ethylene.・ Propylene rubber (EPM, EP), chloroprene rubber (CR), acrylic rubber (ACM, ANM), chlorosulfonated polyethylene rubber (CSM), urethane rubber (PUR), silicone rubber (SI, SR), fluoro rubber (FKM) , FPM), polysulfide rubber (thiocol), and the like. These solid components (I) may be used as a mixture of two or more. Of these, silicone rubber, styrene rubber, styrene olefin rubber, and acrylic rubber are preferable.
上記シリコーンゴムとしてはＫＭＰ−５９４、ＫＭＰ−５９７、ＫＭＰ−５９８（信越化学工業製）、トレフィルＲＴＭＥ−５５００、９７０１、ＥＰ−２００１（東レダウコーニング社製）が好ましく、ウレタンゴムとしてはＪＢ−８００Ｔ、ＨＢ−８００ＢＫ（根上工業株式会社）、スチレンゴムとしてはラバロンＲＴＭＴ３２０Ｃ、Ｔ３３１Ｃ、ＳＪ４４００、ＳＪ５４００、ＳＪ６４００、ＳＪ４３００Ｃ、ＳＪ５３００Ｃ、ＳＪ６３００Ｃ（三菱化学製）が好ましく、スチレンオレフィンゴムとしてはセプトンＲＴＭＳＥＰＳ２００４、ＳＥＰＳ２０６３が好ましい。なお本明細書中、上付きの「ＲＴＭ」は登録商標を意味する。 As the silicone rubber, KMP-594, KMP-597, KMP-598 (manufactured by Shin-Etsu Chemical Co., Ltd.), Trefil RTM E-5500, 9701, EP-2001 (manufactured by Toray Dow Corning) are preferable, and as the urethane rubber, JB- 800T, HB-800BK (Negami Kogyo Co., Ltd.), Lavalon RTM T320C, T331C, SJ4400, SJ5400, SJ6400, SJ4300C, SJ5300C, SJ6300C (Mitsubishi Chemical) are preferable as the styrene rubber, and Septon RTM SEPS2004 as the styrene olefin rubber. SEPS 2063 is preferred. In the present specification, the superscript “RTM” means a registered trademark.
また、上記アクリルゴムを使用する場合、２種類のアクリルゴムからなるコアシェル構造のアクリルゴムである場合が好ましく、特に好ましくはコア層がｎ−ブチルアクリレートであり、シェル層がメチルメタクリレートであるものが好ましい。これはゼフィアックＲＴＭＦ−３５１としてアイカ工業株式会社から販売されている。 Moreover, when using the said acrylic rubber, the case where it is the case of the acrylic rubber of the core shell structure which consists of two types of acrylic rubbers is preferable, Especially preferably, the core layer is n-butyl acrylate and the shell layer is methyl methacrylate. preferable. This is sold by Aika Industries as Zefiac RTM F-351.
上記無機フィラーの例としては、溶融シリカ、結晶シリカ、シリコンカーバイド、窒化珪素、窒化ホウ素、炭酸カルシウム、炭酸マグネシウム、硫酸バリウム、硫酸カルシウム、マイカ、タルク、クレー、アルミナ、酸化マグネシウム、酸化ジルコニウム、水酸化アルミニウム、水酸化マグネシウム、珪酸カルシウム、珪酸アルミニウム、珪酸リチウムアルミニウム、珪酸ジルコニウム、チタン酸バリウム、硝子繊維、炭素繊維、二硫化モリブデン、アスベスト等が挙げられ、好ましくは溶融シリカ、結晶シリカ、窒化珪素、窒化ホウ素、炭酸カルシウム、硫酸バリウム、硫酸カルシウム、マイカ、タルク、クレー、アルミナ、水酸化アルミニウム、珪酸カルシウム、珪酸アルミニウムであり、更に好ましくは溶融シリカ、結晶シリカ、アルミナ、タルクである。これら無機フィラーは２種以上を混合して用いても良い。 Examples of the inorganic filler include fused silica, crystalline silica, silicon carbide, silicon nitride, boron nitride, calcium carbonate, magnesium carbonate, barium sulfate, calcium sulfate, mica, talc, clay, alumina, magnesium oxide, zirconium oxide, water Aluminum oxide, magnesium hydroxide, calcium silicate, aluminum silicate, lithium aluminum silicate, zirconium silicate, barium titanate, glass fiber, carbon fiber, molybdenum disulfide, asbestos, etc., preferably fused silica, crystalline silica, silicon nitride Boron nitride, calcium carbonate, barium sulfate, calcium sulfate, mica, talc, clay, alumina, aluminum hydroxide, calcium silicate, aluminum silicate, more preferably fused silica, crystalline silica, aluminum Na, talc. These inorganic fillers may be used in combination of two or more.
フィラー（ａ）として好ましいものは有機フィラーである。有機フィラーはセルギャップに応じて変形し、液晶の差し込みに対する耐性を発現する為である。
有機フィラーの中で好ましいものは、ウレタンゴム、アクリルゴム、スチレンゴム、スチレンオレフィンゴム、及びシリコーンゴムからなる群より選択される１又は２以上のゴム微粒子であり、更に好ましいものは、アクリルゴム及び／又はシリコーンゴムである。
有機フィラーとして特に好ましいものは、ＫＭＰ−５９４、ＫＭＰ−５９７、ＫＭＰ−５９８（信越化学工業製）、ＡＦＸ−８、ＡＦＸ−１５（積水化成品工業製）、ＪＢ−８００Ｔ、ＨＢ−８００ＢＫ（根上工業製）である。
A preferable filler (a) is an organic filler. This is because the organic filler is deformed according to the cell gap and develops resistance to liquid crystal insertion.
Among the organic fillers, preferred are one or more fine rubber particles selected from the group consisting of urethane rubber, acrylic rubber, styrene rubber, styrene olefin rubber, and silicone rubber, and more preferred are acrylic rubber and / Or silicone rubber.
Particularly preferable organic fillers are KMP-594, KMP-597, KMP-598 (manufactured by Shin-Etsu Chemical Co., Ltd.), AFX-8, AFX-15 (manufactured by Sekisui Plastics Co., Ltd.), JB-800T, HB-800BK (Negami). Industrial).
上記フィラー（ｂ）は、有機フィラー及び／又は無機フィラーを意味する。
有機フィラーとしては、ゼフィアックＲＴＭＦ−３２５、Ｆ−３４０、Ｆ−３５１（アイカ工業株式会社製）、パラロイドＥＸＬ−２６５５（呉羽化学工業株式会社製）などが挙げられる。
The filler (b) means an organic filler and / or an inorganic filler.
Examples of the organic filler include Zefiac RTMF-325, F-340, F-351 (manufactured by Aika Industry Co., Ltd.), Paraloid EXL-2655 (manufactured by Kureha Chemical Industry Co., Ltd.), and the like.
上記無機フィラーの例としては、上記フィラー（ａ）に挙げたものと同様のものが挙げられる。ただし、平均粒子径は上記数式（ＩＩ）を満たすもの、又は、解砕工程を経て、上記数式（ＩＩ）を満たすものとしたものに限られる。また、無機フィラーは様々の方法によって表面処理をされたものでも良いが、未処理のものが好ましい。
このフィラー（ｂ）としては、シリカ又はアルミナが好ましく、特に好ましくはフュームドシリカ、フュームドアルミナである。
As an example of the said inorganic filler, the thing similar to what was mentioned to the said filler (a) is mentioned. However, the average particle size is limited to those satisfying the above formula (II) or those satisfying the above formula (II) through the crushing step. Further, the inorganic filler may be subjected to surface treatment by various methods, but untreated one is preferable.
The filler (b) is preferably silica or alumina, particularly preferably fumed silica or fumed alumina.
フィラー（ａ）とフィラー（ｂ）の表面極性について、フィラー（ａ）が疎水性であって、フィラー（ｂ）が親水性である場合は、本願発明の好ましい態様の一つである。硬化性樹脂（ｃ）は、比較的極性の高いものである為、疎水性のフィラー（ａ）の表面を親水性のフィラー（ｂ）によって保護することによって、より高い分散性が得られる為である。
ここで、親水性とは、表面が水酸基、アミノ基などの水素結合性水酸基を有する官能基で構成されているか金属酸化物などの水素結合受容成分であるものをいう。また疎水性とは、親水性表面をジメチルジクロロシラン、ヘキサメチルジシラザン、オクチルシラン、シリコーンオイルまたは末端に非極性の官能基を有するカップリング剤などで化学的に結合させたものをいう。
About the surface polarity of a filler (a) and a filler (b), when a filler (a) is hydrophobic and a filler (b) is hydrophilic, it is one of the preferable aspects of this invention. Since the curable resin (c) has a relatively high polarity, higher dispersibility can be obtained by protecting the surface of the hydrophobic filler (a) with the hydrophilic filler (b). is there.
Here, the hydrophilic property means that the surface is composed of a functional group having a hydrogen bonding hydroxyl group such as a hydroxyl group or an amino group or is a hydrogen bond accepting component such as a metal oxide. Hydrophobic means that the hydrophilic surface is chemically bonded with dimethyldichlorosilane, hexamethyldisilazane, octylsilane, silicone oil or a coupling agent having a nonpolar functional group at the terminal.
フィラー（ａ）の液晶シール剤中の含有量としては、本願発明の液晶シール剤の総量を１００質量部とした場合に、５〜５０質量部である場合が好ましく、７〜４０質量部である場合がより好ましく、１０〜３０質量部である場合が更に好ましい。
また、フィラー（ｂ）の液晶シール剤中の含有量としては、本願発明の液晶シール剤の総量を１００質量部とした場合に、１〜２０質量部である場合が好ましく、２〜１５質量部である場合がより好ましく、３〜１０質量部である場合が更に好ましい。
As content in the liquid-crystal sealing compound of a filler (a), when the total amount of the liquid-crystal sealing compound of this invention is 100 mass parts, the case where it is 5-50 mass parts is preferable, and it is 7-40 mass parts. The case is more preferable, and the case of 10 to 30 parts by mass is still more preferable.
Moreover, as content in the liquid-crystal sealing compound of a filler (b), when the total amount of the liquid-crystal sealing compound of this invention is 100 mass parts, the case where it is 1-20 mass parts is preferable, and 2-15 mass parts It is more preferable that it is 3 to 10 parts by mass.
本願発明の液晶滴下工法用液晶シール剤は、硬化性化合物（ｃ）を含有する。
この硬化性化合物（ｃ）は、光又は熱によって重合反応するものであれば特に限定されないが、（メタ）アクリロイル基を有する硬化性化合物である場合が特に好ましい。
（メタ）アクリロイル基を有する硬化性化合物は、例えば（メタ）アクリルエステル、エポキシ（メタ）アクリレート等が挙げられる。（メタ）アクリルエステルとしては、ベンジルメタクリレート、シクロヘキシルメタクリレート、グリセロールジメタクリレート、グリセロールトリアクリレート、ＥＯ変性グリセロールトリアクリレート、ペンタエリスリトールアクリレート、トリメチロールプロパントリアクリレート、トリス（アクリロキシエチル）イソシアヌレート、ジペンタエリスリトールヘキサアクリレート、フロログリシノールトリアクリレート等が挙げられる。エポキシ（メタ）アクリレートは、エポキシ樹脂と（メタ）アクリル酸との反応により公知の方法で得られる。原料となるエポキシ樹脂としては、特に限定されるものではないが、２官能以上のエポキシ樹脂が好ましく、例えばビスフェノールＡ型エポキシ樹脂、ビスフェノールＦ型エポキシ樹脂、ビスフェノールＳ型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂、ビスフェノールＡノボラック型エポキシ樹脂、ビスフェノールＦノボラック型エポキシ樹脂、脂環式エポキシ樹脂、脂肪族鎖状エポキシ樹脂、グリシジルエステル型エポキシ樹脂、グリシジルアミン型エポキシ樹脂、ヒダントイン型エポキシ樹脂、イソシアヌレート型エポキシ樹脂、トリフェノールメタン骨格を有するフェノールノボラック型エポキシ樹脂、その他、カテコール、レゾルシノール等の二官能フェノール類のジグリシジルエーテル化物、二官能アルコール類のジグリシジルエーテル化物、およびそれらのハロゲン化物、水素添加物などが挙げられる。これらのうち液晶汚染性の観点から、レゾルシン骨格を有するエポキシ樹脂が好ましく、例えばレゾルシンジグリシジルエーテル等である。また、エポキシ基と（メタ）アクリロイル基との比率は限定されるものではなく、工程適合性及び液晶汚染性の観点から適切に選択される。
したがって、好ましい（メタ）アクリロイル基を有する硬化性化合物は、（メタ）アクリロイル基を有し、さらにレゾルシン骨格を有する硬化性化合物であり、例えば、レゾルシンジグリシジルエーテルのアクリル酸エステルやレゾルシンジグリシジルエーテルのメタクリル酸エステルである。
また、硬化性化合物（ｃ）の液晶滴下工法用液晶シール剤中に占める含有率としては、液晶シール剤の総量を１００質量部とした場合に、３０〜９０質量部の範囲内であることが好ましく、さらに好ましくは４０〜８０質量部程度である。
The liquid crystal sealing agent for a liquid crystal dropping method of the present invention contains a curable compound (c).
The curable compound (c) is not particularly limited as long as it undergoes a polymerization reaction by light or heat, but is particularly preferably a curable compound having a (meth) acryloyl group.
Examples of the curable compound having a (meth) acryloyl group include (meth) acrylic ester and epoxy (meth) acrylate. (Meth) acrylic esters include benzyl methacrylate, cyclohexyl methacrylate, glycerol dimethacrylate, glycerol triacrylate, EO-modified glycerol triacrylate, pentaerythritol acrylate, trimethylolpropane triacrylate, tris (acryloxyethyl) isocyanurate, dipentaerythritol. Examples include hexaacrylate and phloroglucinol triacrylate. Epoxy (meth) acrylate is obtained by a known method by a reaction between an epoxy resin and (meth) acrylic acid. Although it does not specifically limit as an epoxy resin used as a raw material, An epoxy resin more than bifunctional is preferable, for example, a bisphenol A type epoxy resin, a bisphenol F type epoxy resin, a bisphenol S type epoxy resin, a phenol novolac type epoxy resin , Cresol novolac type epoxy resin, bisphenol A novolac type epoxy resin, bisphenol F novolac type epoxy resin, alicyclic epoxy resin, aliphatic chain epoxy resin, glycidyl ester type epoxy resin, glycidylamine type epoxy resin, hydantoin type epoxy resin , Isocyanurate type epoxy resins, phenol novolac type epoxy resins having a triphenolmethane skeleton, and other difunctional phenolic diglycidyl esters such as catechol and resorcinol Ether compound, bi-functional alcohol diglycidyl ethers of, and their halides, and the like hydrogenated product. Among these, from the viewpoint of liquid crystal contamination, an epoxy resin having a resorcin skeleton is preferable, such as resorcin diglycidyl ether. Further, the ratio of the epoxy group to the (meth) acryloyl group is not limited, and is appropriately selected from the viewpoint of process compatibility and liquid crystal contamination.
Therefore, a preferable curable compound having a (meth) acryloyl group is a curable compound having a (meth) acryloyl group and further having a resorcin skeleton, such as an acrylic acid ester of resorcin diglycidyl ether or resorcin diglycidyl ether. Methacrylic acid ester.
Further, the content of the curable compound (c) in the liquid crystal sealing agent for the liquid crystal dropping method may be within a range of 30 to 90 parts by mass when the total amount of the liquid crystal sealing agent is 100 parts by mass. More preferably, it is about 40-80 mass parts.
上記（メタ）アクリロイル基を有する硬化性化合物中には、一分子中に（メタ）アクリロイル基を３個以上有する化合物を含有する場合が好ましい。一分子中に（メタ）アクリロイル基を３個以上有する化合物は、架橋速度（反応速度）が速いため、優れた差込耐性を実現できる。なお、この方法を用いた場合、熱ラジカル重合開始剤等の量を増やして、反応性を向上させる方法とは異なり、ハンドリング性にも優れる。
一分子中に（メタ）アクリロイル基を３個以上有する化合物としては、ＫＡＹＡＲＡＤＲＴＭＰＥＴ−３０、ＤＰＨＡ、ＤＰＣＡ−２０、ＤＰＣＡ−３０、ＤＰＣＡ−６０、ＤＰＣＡ−１２０、ＤＰＥＡ−１２、ＧＰＯ−３０３、ＴＭＰＴＡ、ＴＨＥ-３３０、ＴＰＡ−３２０、ＴＰＡ−３３０、Ｄ−３１０，Ｄ−３３０、ＲＰ−１０４０、ＵＸ−５０００、ＤＰＨＡ−４０Ｈ（以上、日本化薬株式会社製）、ＮＫエステルＲＴＭＡ−９３００、Ａ−９３００−１ＣＬ、Ａ−ＧＬＹ−９Ｅ、Ａ−ＧＬＹ−２０Ｅ、Ａ−ＴＭＭ−３、Ａ−ＴＭＭ−３ＬＭ−Ｎ、Ａ−ＴＭＰＴ、ＡＤ−ＴＭＰ、ＡＴＭ−３５Ｅ、Ａ−ＴＭＭＴ、Ａ−９５５０、Ａ−ＤＰＨ（以上、新中村化学工業株式会社）、ＳＲ２９５、ＳＲ３５０、ＳＲ３５５、ＳＲ３９９、ＳＲ４９４、ＣＤ５０１、ＳＲ５０２、ＣＤ９０２１、ＳＲ９０３５、ＳＲ９０４１（以上、サートマー社製）等を挙げることができる。これらのうち、モル平均分子量が８００以上である場合が好ましく、例えばＫＡＹＡＲＡＤＲＴＭＤＰＣＡ−２０、ＤＰＣＡ−３０、ＤＰＥＡ−１２が好ましい。また、分子内にＣ１−Ｃ４アルキレンオキサイド（−Ｏ−Ｒ−Ｏ−）を含有する硬化性化合物である場合が好ましく、ＫＡＹＡＲＡＤＲＴＭＤＰＥＡ−１２が特に好ましい。
The curable compound having a (meth) acryloyl group preferably contains a compound having 3 or more (meth) acryloyl groups in one molecule. Since a compound having three or more (meth) acryloyl groups in one molecule has a high crosslinking rate (reaction rate), excellent insertion resistance can be realized. In addition, when this method is used, it is excellent in handling property unlike the method of increasing the amount of the thermal radical polymerization initiator and the like to improve the reactivity.
As a compound having three or more (meth) acryloyl groups in one molecule, KAYARAD RTM PET-30, DPHA, DPCA-20, DPCA-30, DPCA-60, DPCA-120, DPEA-12, GPO-303, TMPTA, THE-330, TPA-320, TPA-330, D-310, D-330, RP-1040, UX-5000, DPHA-40H (above, Nippon Kayaku Co., Ltd.), NK Ester RTM A-9300 A-9300-1CL, A-GLY-9E, A-GLY-20E, A-TMM-3, A-TMM-3LM-N, A-TMPT, AD-TMP, ATM-35E, A-TMMT, A -9550, A-DPH (above, Shin-Nakamura Chemical Co., Ltd.), SR295, SR350, SR355, SR399, S R494, CD501, SR502, CD9021, SR9035, SR9041 (above, manufactured by Sartomer) and the like. Among these, the case where a molar average molecular weight is 800 or more is preferable, for example, KAYARAD RTM DPCA-20, DPCA-30, and DPEA-12 are preferable. Moreover, the case where it is a curable compound containing C1-C4 alkylene oxide (—O—R—O—) in the molecule is preferable, and KAYARAD RTM DPEA-12 is particularly preferable.
本願発明の液晶滴下工法用液晶シール剤は、熱硬化剤（ｄ）を含有しても良い。
この熱硬化剤は特に限定されるものではなく、多価アミン類、多価フェノール類、ヒドラジド化合物等を挙げることができるが、固形の有機酸ヒドラジドが特に好適に用いられる。例えば、芳香族ヒドラジドであるサリチル酸ヒドラジド、安息香酸ヒドラジド、１−ナフトエ酸ヒドラジド、テレフタル酸ジヒドラジド、イソフタル酸ジヒドラジド、２，６−ナフトエ酸ジヒドラジド、２，６−ピリジンジヒドラジド、１，２，４−ベンゼントリヒドラジド、１，４，５，８−ナフトエ酸テトラヒドラジド、ピロメリット酸テトラヒドラジド等をあげることが出来る。また、脂肪族ヒドラジド化合物であれば、例えば、ホルムヒドラジド、アセトヒドラジド、プロピオン酸ヒドラジド、シュウ酸ジヒドラジド、マロン酸ジヒドラジド、コハク酸ジヒドラジド、グルタル酸ジヒドラジド、アジピン酸ジヒドラジド、ピメリン酸ジヒドラジド、セバシン酸ジヒドラジド、１，４−シクロヘキサンジヒドラジド、酒石酸ジヒドラジド、リンゴ酸ジヒドラジド、イミノジ酢酸ジヒドラジド、Ｎ，Ｎ’−ヘキサメチレンビスセミカルバジド、クエン酸トリヒドラジド、ニトリロ酢酸トリヒドラジド、シクロヘキサントリカルボン酸トリヒドラジド、１，３−ビス（ヒドラジノカルボノエチル）−５−イソプロピルヒダントイン等のヒダントイン骨格、好ましくはバリンヒダントイン骨格（ヒダントイン環の炭素原子がイソプロピル基で置換された骨格）を有するジヒドラジド化合物、トリス（１−ヒドラジノカルボニルメチル）イソシアヌレート、トリス（２−ヒドラジノカルボニルエチル）イソシアヌレート、トリス（２−ヒドラジノカルボニルエチル）イソシアヌレート、トリス（３−ヒドラジノカルボニルプロピル）イソシアヌレート、ビス（２−ヒドラジノカルボニルエチル）イソシアヌレート等をあげることができる。この熱硬化剤は、単独で用いても２種以上混合しても良い。硬化反応性と潜在性とのバランスから好ましくは、イソフタル酸ジヒドラジド、マロン酸ジヒドラジド、アジピン酸ジヒドラジド、セバシン酸ジヒドラジド、トリス（１−ヒドラジノカルボニルメチル）イソシアヌレート、トリス（２−ヒドラジノカルボニルエチル）イソシアヌレート、トリス（３−ヒドラジノカルボニルプロピル）イソシアヌレートであり、特に好ましくはマロン酸ジヒドラジド、セバシン酸ジヒドラジドである。かかる熱硬化剤を使用する場合の含有量としては、液晶シール剤の総量を１００質量部とした場合に、１〜３０質量部程度である。
The liquid crystal sealing agent for a liquid crystal dropping method of the present invention may contain a thermosetting agent (d).
The thermosetting agent is not particularly limited, and examples thereof include polyvalent amines, polyhydric phenols, hydrazide compounds, and the like, but solid organic acid hydrazide is particularly preferably used. For example, the aromatic hydrazide salicylic acid hydrazide, benzoic acid hydrazide, 1-naphthoic acid hydrazide, terephthalic acid dihydrazide, isophthalic acid dihydrazide, 2,6-naphthoic acid dihydrazide, 2,6-pyridinedihydrazide, 1,2,4-benzene Examples include trihydrazide, 1,4,5,8-naphthoic acid tetrahydrazide, pyromellitic acid tetrahydrazide and the like. Examples of aliphatic hydrazide compounds include form hydrazide, acetohydrazide, propionic acid hydrazide, oxalic acid dihydrazide, malonic acid dihydrazide, succinic acid dihydrazide, glutaric acid dihydrazide, adipic acid dihydrazide, pimelic acid dihydrazide, sebacic acid dihydrazide. 1,4-cyclohexanedihydrazide, tartaric acid dihydrazide, malic acid dihydrazide, iminodiacetic acid dihydrazide, N, N'-hexamethylenebissemicarbazide, citric acid trihydrazide, nitriloacetic acid trihydrazide, cyclohexanetricarboxylic acid trihydrazide, 1,3-bis ( Hydantoin skeleton such as hydrazinocarbonoethyl) -5-isopropylhydantoin, preferably valine hydantoin skeleton (where the carbon atom of the hydantoin ring is iso Dihydrazide compounds having a skeleton substituted with a propyl group), tris (1-hydrazinocarbonylmethyl) isocyanurate, tris (2-hydrazinocarbonylethyl) isocyanurate, tris (2-hydrazinocarbonylethyl) isocyanurate, tris (3-hydrazinocarbonylpropyl) isocyanurate, bis (2-hydrazinocarbonylethyl) isocyanurate and the like can be mentioned. These thermosetting agents may be used alone or in combination of two or more. Preferably, from the balance of curing reactivity and latency, isophthalic acid dihydrazide, malonic acid dihydrazide, adipic acid dihydrazide, sebacic acid dihydrazide, tris (1-hydrazinocarbonylmethyl) isocyanurate, tris (2-hydrazinocarbonylethyl) Isocyanurate and tris (3-hydrazinocarbonylpropyl) isocyanurate, particularly preferably malonic acid dihydrazide and sebacic acid dihydrazide. When the thermosetting agent is used, the content is about 1 to 30 parts by mass when the total amount of the liquid crystal sealant is 100 parts by mass.
本願発明の液晶滴下工法用液晶シール剤は、更に熱ラジカル重合開始剤を含有しても良い。この熱ラジカル重合開始剤は、加熱によりラジカルを生じ、連鎖重合反応を開始させる化合物であれば特に限定されないが、有機過酸化物、アゾ化合物、ベンゾイン化合物、ベンゾインエーテル化合物、アセトフェノン化合物、ベンゾピナコール等が挙げられ、ベンゾピナコールが好適に用いられる。例えば、有機過酸化物としては、カヤメックＲＴＭＡ、Ｍ、Ｒ、Ｌ、ＬＨ、ＳＰ-３０Ｃ、パーカドックスＣＨ−５０Ｌ、ＢＣ−ＦＦ、カドックスＢ−４０ＥＳ、パーカドックス１４、トリゴノックスＲＴＭ２２−７０Ｅ、２３−Ｃ７０、１２１、１２１−５０Ｅ、１２１−ＬＳ５０Ｅ、２１−ＬＳ５０Ｅ、４２、４２ＬＳ、カヤエステルＲＴＭＰ−７０、ＴＭＰＯ−７０、ＣＮＤ−Ｃ７０、ＯＯ−５０Ｅ、ＡＮ、カヤブチルＲＴＭＢ、パーカドックス１６、カヤカルボンＲＴＭＢＩＣ−７５、ＡＩＣ−７５（以上、化薬アクゾ株式会社製）、パーメックＲＴＭＮ、Ｈ、Ｓ、Ｆ、Ｄ、Ｇ、パーヘキサＲＴＭＨ、ＨＣ、パＴＭＨ、Ｃ、Ｖ、２２、ＭＣ、パーキュアーＲＴＭＡＨ、ＡＬ、ＨＢ、パーブチルＲＴＭＨ、Ｃ、ＮＤ、Ｌ、パークミルＲＴＭＨ、Ｄ、パーロイルＲＴＭＩＢ、ＩＰＰ、パーオクタＲＴＭＮＤ、（以上、日油株式会社製）等などが市販品として入手可能である。また、アゾ化合物としては、ＶＡ−０４４、Ｖ−０７０、ＶＰＥ−０２０１、ＶＳＰ−１００１等（以上、和光純薬工業株式会社製）等が市販品として入手可能である。なお、本明細書中、上付きのＲＴＭは登録商標を意味する。
上記（ｅ）熱ラジカル重合開始剤として、好ましいのは、分子内に酸素−酸素結合（−Ｏ−Ｏ−）又は窒素−窒素結合（−Ｎ＝Ｎ−）を有さない熱ラジカル重合開始剤である。分子内に酸素−酸素結合（−Ｏ−Ｏ−）や窒素−窒素結合（−Ｎ＝Ｎ−）を有する熱ラジカル重合開始剤は、ラジカル発生時に多量の酸素や窒素を発するため、液晶シール剤中に気泡を残した状態で硬化し、接着強度等の特性を低下させる虞がある。ベンゾピナコール系の熱ラジカル重合開始剤（ベンゾピナコールを化学的に修飾したものを含む）が特に好適である。具体的には、ベンゾピナコール、１, ２−ジメトキシ−１，１, ２，２−テトラフェニルエタン、１, ２−ジエトキシ−１，１, ２，２−テトラフェニルエタン、１, ２−ジフェノキシ−１，１, ２，２−テトラフェニルエタン、１, ２−ジメトキシ−１，１, ２，２−テトラ（４−メチルフェニル）エタン、１, ２−ジフェノキシ−１，１, ２，２−テトラ（４−メトキシフェニル）エタン、１, ２−ビス（トリメチルシロキシ）−１，１, ２，２−テトラフェニルエタン、１, ２−ビス（トリエチルシロキシ）−１，１, ２，２−テトラフェニルエタン、１, ２−ビス（ｔ−ブチルジメチルシロキシ）−１，１, ２，２−テトラフェニルエタン、１−ヒドロキシ−２−トリメチルシロキシ−１，１, ２，２−テトラフェニルエタン、１−ヒドロキシ−２−トリエチルシロキシ−１，１, ２，２−テトラフェニルエタン、１−ヒドロキシ−２−ｔ−ブチルジメチルシロキシ−１，１, ２，２−テトラフェニルエタン等、が挙げられ、好ましくは１−ヒドロキシ−２−トリメチルシロキシ−１，１, ２，２−テトラフェニルエタン、１−ヒドロキシ−２−トリエチルシロキシ−１，１, ２，２−テトラフェニルエタン、１−ヒドロキシ−２−ｔ−ブチルジメチルシロキシ−１，１, ２，２−テトラフェニルエタン、１, ２−ビス（トリメチルシロキシ）−１，１, ２，２−テトラフェニルエタンであり、さらに好ましくは１−ヒドロキシ−２−トリメチルシロキシ−１，１, ２，２−テトラフェニルエタン、１, ２−ビス（トリメチルシロキシ）−１，１, ２，２−テトラフェニルエタンであり、特に好ましくは１, ２−ビス（トリメチルシロキシ）−１，１, ２，２−テトラフェニルエタンである。
上記ベンゾピナコールは東京化成工業株式会社、和光純薬工業株式会社等から市販されている。また、ベンゾピナコールのヒドロキシ基をエーテル化することは、周知の方法によって容易に合成可能である。また、ベンゾピナコールのヒドロキシ基をシリルエーテル化することは、対応するベンゾピナコールと各種シリル化剤をピリジン等の塩基性触媒下で加熱させる方法により合成して得ることができる。シリル化剤としては、一般に知られているトリメチルシリル化剤であるトリメチルクロロシラン（ＴＭＣＳ）、ヘキサメチルジシラザン（ＨＭＤＳ）、Ｎ,Ｏ−ビス（トリメチルシリル）トリフルオロアセトアミド(ＢＳＴＦＡ）やトリエチルシリル化剤としてトリエチルクロロシラン（ＴＥＣＳ）、ｔ−ブチルジメチルシリル化剤としてｔ−ブチルメチルシラン（ＴＢＭＳ）等が挙げられる。これらの試薬はシリコン誘導体メーカー等の市場から容易に入手することが出来る。シリル化剤の反応量としては対象化合物の水酸基１モルに対して１．０〜５．０倍モルが好ましい。さらに好ましくは１．５〜３．０倍モルである。１．０倍モルより少ないと反応効率が悪く、反応時間が長くなるため熱分解を促進してしまう。５．０倍モルより多いと回収の際に分離が悪くなったり、精製が困難になったりしてしまう。
The liquid crystal sealing agent for the liquid crystal dropping method of the present invention may further contain a thermal radical polymerization initiator. This thermal radical polymerization initiator is not particularly limited as long as it is a compound that generates radicals by heating and initiates a chain polymerization reaction, but is not limited to organic peroxides, azo compounds, benzoin compounds, benzoin ether compounds, acetophenone compounds, benzopinacols, etc. And benzopinacol is preferably used. For example, examples of the organic peroxide include Kayamek RTM A, M, R, L, LH, SP-30C, Parkadox CH-50L, BC-FF, Kadox B-40ES, Parkadox 14, Trigonox RTM 22-70E, 23-C70, 121, 121-50E, 121-LS50E, 21-LS50E, 42, 42LS, Kaya Ester RTM P-70, TMPO-70, CND-C70, OO-50E, AN, Kayabutyl RTM B, Parkardox 16 , Kayacarbon RTM BIC-75, AIC-75 (manufactured by Kayaku Akzo Co., Ltd.), Permec RTM N, H, S, F, D, G, Perhexa RTM H, HC, Pat TMH, C, V, 22, MC, Percure RTM AH, AL, HB, Perbutyl RTM H, C, ND, L, Parkmi Le RTM H, D, Parroyl RTM IB, IPP, Per Octa RTM ND, (manufactured by NOF CORPORATION) and the like are available as commercial products. Moreover, as an azo compound, VA-044, V-070, VPE-0201, VSP-1001, etc. (above, Wako Pure Chemical Industries Ltd. make) etc. are available as a commercial item. In the present specification, the superscript RTM means a registered trademark.
The above (e) thermal radical polymerization initiator is preferably a thermal radical polymerization initiator having no oxygen-oxygen bond (—O—O—) or nitrogen-nitrogen bond (—N═N—) in the molecule. It is. A thermal radical polymerization initiator having an oxygen-oxygen bond (—O—O—) or a nitrogen-nitrogen bond (—N═N—) in the molecule emits a large amount of oxygen or nitrogen when a radical is generated. There exists a possibility that it hardens | cures in the state which left the bubble inside, and characteristics, such as adhesive strength, may be reduced. Particularly preferred are benzopinacol-based thermal radical polymerization initiators (including those obtained by chemically modifying benzopinacol). Specifically, benzopinacol, 1,2-dimethoxy-1,1,2,2-tetraphenylethane, 1,2-diethoxy-1,1,2,2-tetraphenylethane, 1,2-diphenoxy- 1,1,2,2-tetraphenylethane, 1,2-dimethoxy-1,1,2,2-tetra (4-methylphenyl) ethane, 1,2-diphenoxy-1,1,2,2-tetra (4-methoxyphenyl) ethane, 1,2-bis (trimethylsiloxy) -1,1,2,2-tetraphenylethane, 1,2-bis (triethylsiloxy) -1,1,2,2-tetraphenyl Ethane, 1,2-bis (t-butyldimethylsiloxy) -1,1,2,2-tetraphenylethane, 1-hydroxy-2-trimethylsiloxy-1,1,2,2-tetraphenylethane, 1- Hydroxy 2-triethylsiloxy-1,1,2,2-tetraphenylethane, 1-hydroxy-2-tert-butyldimethylsiloxy-1,1,2,2-tetraphenylethane, and the like are preferable, and preferably 1- Hydroxy-2-trimethylsiloxy-1,1,2,2-tetraphenylethane, 1-hydroxy-2-triethylsiloxy-1,1,2,2-tetraphenylethane, 1-hydroxy-2-t-butyldimethyl Siloxy-1,1,2,2-tetraphenylethane, 1,2-bis (trimethylsiloxy) -1,1,2,2-tetraphenylethane, more preferably 1-hydroxy-2-trimethylsiloxy- 1,1,2,2-tetraphenylethane, 1,2-bis (trimethylsiloxy) -1,1,2,2-tetraphenylethane, especially The Mashiku 1, 2- bis (trimethylsiloxy) -1,1, 2,2-tetraphenyl ethane.
The benzopinacol is commercially available from Tokyo Chemical Industry Co., Ltd., Wako Pure Chemical Industries, Ltd. Moreover, etherification of the hydroxy group of benzopinacol can be easily synthesized by a known method. Moreover, silyl etherification of the hydroxy group of benzopinacol can be obtained by synthesizing by a method in which the corresponding benzopinacol and various silylating agents are heated under a basic catalyst such as pyridine. Examples of silylating agents include trimethylchlorosilane (TMCS), hexamethyldisilazane (HMDS), N, O-bis (trimethylsilyl) trifluoroacetamide (BSTFA) and triethylsilylating agents, which are generally known trimethylsilylating agents. Examples of triethylchlorosilane (TECS) and t-butyldimethylsilylating agent include t-butylmethylsilane (TBMS). These reagents can be easily obtained from markets such as silicon derivative manufacturers. The reaction amount of the silylating agent is preferably 1.0 to 5.0 times mol for 1 mol of the hydroxyl group of the target compound. More preferably, it is 1.5-3.0 times mole. When the amount is less than 1.0 times mol, the reaction efficiency is poor and the reaction time is prolonged, so that thermal decomposition is promoted. When the amount is more than 5.0 times mol, separation may be deteriorated during collection or purification may be difficult.
（ｅ）熱ラジカル重合開始剤は粒径を細かくし、均一に分散することが好ましい。その平均粒径は、大きすぎると狭ギャップの液晶表示セル製造時に上下ガラス基板を貼り合わせる際のギャップ形成が上手くできない等の不良要因となるため、５μｍ以下が好ましく、より好ましくは３μｍ以下である。また、際限なく細かくしても差し支えないが、通常下限は０．１μｍ程度である。粒径はレーザー回折・散乱式粒度分布測定器（乾式）（株式会社セイシン企業製；ＬＭＳ−３０）により測定できる。 (E) It is preferable that the thermal radical polymerization initiator has a fine particle size and is uniformly dispersed. The average particle size is preferably 5 μm or less, more preferably 3 μm or less, because if the average particle size is too large, it becomes a cause of defects such as inability to successfully form a gap when the upper and lower glass substrates are bonded together during the production of a narrow gap liquid crystal display cell. . Moreover, although it does not matter even if it makes it infinitely small, usually a minimum is about 0.1 micrometer. The particle size can be measured by a laser diffraction / scattering particle size distribution analyzer (dry type) (manufactured by Seishin Enterprise Co., Ltd .; LMS-30).
（ｅ）熱ラジカル重合開始剤の含有量としては、本発明で使用される液晶シール剤の総量を１００質量部とした場合、０．０００１〜１０質量部であることが好ましく、さらに好ましくは０．０００５〜５質量部であり、０．００１〜３質量部が特に好ましい。 (E) The content of the thermal radical polymerization initiator is preferably 0.0001 to 10 parts by mass, more preferably 0 when the total amount of the liquid crystal sealant used in the present invention is 100 parts by mass. .0005 to 5 parts by mass, and 0.001 to 3 parts by mass is particularly preferable.
本願発明の液晶滴下工法用液晶シール剤は、（ｆ）シランカップリング剤を用いて、接着強度向上や耐湿信頼性向上を図ることができる。シランカップリング剤としては、３−グリシドキシプロピルトリメトキシシラン、３−グリシドキシプロピルメチルジメトキシシラン、３−グリシドキシプロピルメチルジエトキシシラン、２−（３，４−エポキシシクロヘキシル）エチルトリメトキシシラン、Ｎ−フェニル−γ−アミノプロピルトリメトキシシラン、Ｎ−（２−アミノエチル）３−アミノプロピルメチルジメトキシシラン、Ｎ−（２−アミノエチル）３−アミノプロピルメチルトリメトキシシラン、３−アミノプロピルトリエトキシシラン、３−メルカプトプロピルトリメトキシシラン、ビニルトリメトキシシラン、Ｎ−（２−（ビニルベンジルアミノ）エチル）３−アミノプロピルトリメトキシシラン塩酸塩、３−メタクリロキシプロピルトリメトキシシラン、３−クロロプロピルメチルジメトキシシラン、３−クロロプロピルトリメトキシシラン等が挙げられる。これらのシランカップリング剤はＫＢＭシリーズ、ＫＢＥシリーズ等として信越化学工業株式会社等によって販売されているため、市場から容易に入手可能である。シランカップリング剤の液晶シール剤に占める含有量は、本発明で使用される液晶シール剤の全体を１００質量部とした場合、０．０５〜３質量部が好適である。 The liquid crystal sealing agent for the liquid crystal dropping method of the present invention can improve adhesion strength and moisture resistance reliability by using (f) a silane coupling agent. As silane coupling agents, 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropylmethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltri Methoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) 3-aminopropylmethyltrimethoxysilane, 3- Aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, vinyltrimethoxysilane, N- (2- (vinylbenzylamino) ethyl) 3-aminopropyltrimethoxysilane hydrochloride, 3-methacryloxypropyltrimethoxysilane, 3-black Propyl methyl dimethoxy silane, 3-chloropropyl trimethoxy silane, and the like. Since these silane coupling agents are sold by Shin-Etsu Chemical Co., Ltd. as KBM series, KBE series, etc., they are easily available from the market. The content of the silane coupling agent in the liquid crystal sealant is preferably 0.05 to 3 parts by mass when the total liquid crystal sealant used in the present invention is 100 parts by mass.
本願発明の液晶滴下工法用液晶シール剤は、（ｇ）エポキシ樹脂を添加して、更なる接着強度の向上を図ることができる。用いられるエポキシ樹脂としては、特に限定されるものではないが、２官能以上のエポキシ樹脂が好ましく、例えばビスフェノールＡ型エポキシ樹脂、ビスフェノールＦ型エポキシ樹脂、ビスフェノールＳ型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂、ビスフェノールＡノボラック型エポキシ樹脂、ビスフェノールＦノボラック型エポキシ樹脂、脂環式エポキシ樹脂、脂肪族鎖状エポキシ樹脂、グリシジルエステル型エポキシ樹脂、グリシジルアミン型エポキシ樹脂、ヒダントイン型エポキシ樹脂、イソシアヌレート型エポキシ樹脂、トリフェノールメタン骨格を有するフェノールノボラック型エポキシ樹脂、その他、二官能フェノール類のジグリシジルエーテル化物、二官能アルコール類のジグリシジルエーテル化物、およびそれらのハロゲン化物、水素添加物などが挙げられる。これらのうち液晶汚染性の観点より好ましいのはビスフェノール型エポキシ樹脂、ノボラック型エポキシ樹脂である。エポキシ基を有する硬化性樹脂の液晶シール剤中に占める含有量は、液晶シール剤の総量を１００質量部とした場合に、１〜３０質量部程度である。 The liquid crystal sealing agent for a liquid crystal dropping method of the present invention can be further improved in adhesive strength by adding (g) an epoxy resin. The epoxy resin used is not particularly limited, but a bifunctional or higher functional epoxy resin is preferable. For example, bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, phenol novolac type epoxy resin, Cresol novolac type epoxy resin, bisphenol A novolak type epoxy resin, bisphenol F novolak type epoxy resin, alicyclic epoxy resin, aliphatic chain epoxy resin, glycidyl ester type epoxy resin, glycidyl amine type epoxy resin, hydantoin type epoxy resin, Isocyanurate type epoxy resins, phenol novolac type epoxy resins having a triphenolmethane skeleton, other diglycidyl ethers of difunctional phenols, difunctional alcohols Diglycidyl ether compound, and their halides, and the like hydrogenated product. Among these, bisphenol type epoxy resin and novolac type epoxy resin are preferable from the viewpoint of liquid crystal contamination. The content of the curable resin having an epoxy group in the liquid crystal sealant is about 1 to 30 parts by mass when the total amount of the liquid crystal sealant is 100 parts by mass.
本発明の液晶シール剤は上記成分及び必要な場合に含有される成分以外にも、例えば光重合開始剤、ラジカル重合防止剤、硬化促進剤、顔料、レベリング剤、消泡剤、溶剤などを含有するものであってもよい。 The liquid crystal sealing agent of the present invention contains, for example, a photopolymerization initiator, a radical polymerization inhibitor, a curing accelerator, a pigment, a leveling agent, an antifoaming agent, a solvent and the like in addition to the above components and components contained when necessary. You may do.
上記光重合開始剤としては、紫外線や可視光の照射によって、ラジカルや酸を発生し、連鎖重合反応を開始させる化合物であれば特に限定されないが、例えば、ベンジルジメチルケタール、１−ヒドロキシシクロヘキシルフェニルケトン、ジエチルチオキサントン、ベンゾフェノン、２−エチルアンスラキノン、２−ヒドロキシ−２−メチルプロピオフェノン、２−メチル−〔４−（メチルチオ）フェニル〕−２−モルフォリノ−１−プロパン、２，４，６−トリメチルベンゾイルジフェニルホスヒンオキサイド、カンファーキノン、９−フルオレノン、ジフェニルジスルヒド等を挙げることができる。具体的には、ＩＲＧＡＣＵＲＥＲＴＭ ６５１、１８４、２９５９、１２７、９０７、３９６、３７９ＥＧ、８１９、７８４、７５４、５００、ＯＸＥ０１、ＯＸＥ０２、ＤＡＲＯＣＵＲＥＲＴＭ１１７３、ＬＵＣＩＲＩＮＲＴＭ ＴＰＯ（いずれもＢＡＳＦ社製）、セイクオールＲＴＭＺ、ＢＺ、ＢＥＥ、ＢＩＰ、ＢＢＩ（いずれも精工化学株式会社製）等を挙げることができる。
また、液晶汚染性の観点から、分子内に（メタ）アクリル基を有するものを使用する事が好ましく、例えば２−メタクリロイルオキシエチルイソシアネートと１−[４−（２−ヒドロキシエトキシ）−フェニル]−２−ヒドロキシ−２メチル−１−プロパン−１−オンとの反応生成物が好適に用いられる。この化合物は国際公開第２００６／０２７９８２号記載の方法にて製造して得ることができる。
光重合開始剤を用いる場合の液晶シール剤総量中の含有率は、通常０．００１〜３質量％、好ましくは０．００２〜２質量％である。
The photopolymerization initiator is not particularly limited as long as it is a compound that generates radicals or acids upon irradiation with ultraviolet rays or visible light, and initiates a chain polymerization reaction. For example, benzyldimethyl ketal, 1-hydroxycyclohexyl phenyl ketone , Diethylthioxanthone, benzophenone, 2-ethylanthraquinone, 2-hydroxy-2-methylpropiophenone, 2-methyl- [4- (methylthio) phenyl] -2-morpholino-1-propane, 2,4,6- Examples thereof include trimethylbenzoyldiphenylphosphine oxide, camphorquinone, 9-fluorenone, diphenyldisulfide and the like. Specifically, IRGACURE RTM 651, 184, 2959, 127, 907, 396, 379EG, 819, 784, 754, 500, OXE01, OXE02, DAROCURE RTM 1173, LUCIRIN RTM TPO (all manufactured by BASF), Sequol RTM Z, BZ, BEE, BIP, BBI (all of which are manufactured by Seiko Chemical Co., Ltd.) and the like.
Moreover, it is preferable to use what has a (meth) acryl group in a molecule | numerator from a liquid crystal contamination viewpoint, for example, 2-methacryloyloxyethyl isocyanate and 1- [4- (2-hydroxyethoxy) -phenyl]- The reaction product with 2-hydroxy-2methyl-1-propan-1-one is preferably used. This compound can be obtained by the method described in International Publication No. 2006/027982.
When the photopolymerization initiator is used, the content of the liquid crystal sealant in the total amount is usually 0.001 to 3% by mass, preferably 0.002 to 2% by mass.
上記ラジカル重合防止剤としては、光重合開始剤や熱ラジカル重合開始剤等から発生するラジカルと反応して重合を防止する化合物であれば特に限定されるものではなく、キノン系、ピペリジン系、ヒンダードフェノール系、ニトロソ系等を用いることができる。具体的には、ナフトキノン、２−ヒドロキシナフトキノン、２−メチルナフトキノン、２−メトキシナフトキノン、２，２，６，６，−テトラメチルピペリジン−１−オキシル、２，２，６，６，−テトラメチル−４−ヒドロキシピペリジン−１−オキシル、２，２，６，６，−テトラメチル−４−メトキシピペリジン−１−オキシル、２，２，６，６，−テトラメチル−４−フェノキシピペリジン−１−オキシル、ハイドロキノン、２−メチルハイドロキノン、２−メトキシハイドロキノン、パラベンゾキノン、ブチル化ヒドロキシアニソール、２，６−ジ−ｔ−ブチル−４−エチルフェノール、２，６−ジ−ｔ−ブチルクレゾール、ステアリルβ−（３，５−ジｔ−ブチル−４−ヒドロキシフェニル）プロピオネート、２，２’−メチレンビス（４−エチル−６−ｔ−ブチルフェノール）、４，４’−チオビス−３−メチル−６−ｔ−ブチルフェノール）、４，４’−ブチリデンビス（３−メチル−６−ｔ−ブチルフェノール）、３，９−ビス[１，１−ジメチル−２−[β―（３−ｔ−ブチル−４−ヒドロキシ−５−メチルフェニル）プロピオニルオキシ]エチル]、２，４，８，１０−テトラオキサスピロ[５，５]ウンデカン、テトラキス−[メチレン−３−（３’，５’−ジ−ｔ−ブチル−４’−ヒドロキシフェニルプロピオネート）メタン、１，３，５−トリス（３’，５’−ジ−ｔ−ブチル−４’−ヒドロキシベンジル）−ｓｅｃ−トリアジン−２，４，６−（１Ｈ，３Ｈ，５Ｈ）トリオン、パラメトキシフェノール、４−メトキシ−１−ナフトール、チオジフェニルアミン、Ｎ−ニトロソフェニルヒドロキシアミンのアルミニウム塩、商品名アデカスタブＬＡ−８１、商品名アデカスタブＬＡ−８２（株式会社アデカ製）等が挙げられるが、これらに限定されるものではない。これらのうちナフトキノン系、ハイドロキノン系、ニトロソ系ピペラジン系のラジカル重合防止剤が好ましく、ナフトキノン、２−ヒドロキシナフトキノン、ハイドロキノン、２，６−ジ−ｔｅｒｔ−ブチル−Ｐ−クレゾール、ポリストップ７３００Ｐ（伯東株式会社製）が更に好ましく、ポリストップ７３００Ｐ（伯東株式会社製）が最も好ましい。
ラジカル重合防止剤は、成分（ｃ）を合成する際に添加する方法や、液晶シール剤の製造時において成分（ｃ）に溶解させる方法があるが、より有効な効果を得る為には液晶シール剤の製造時において成分（ｃ）に溶解させるほうが好ましい。
ラジカル重合防止剤の含有量としては本発明の液晶シール剤総量中、０．０００１〜１質量％が好ましく、０．００１〜０．５質量％が更に好ましく、０．０１〜０．２質量％が特に好ましい。
The radical polymerization inhibitor is not particularly limited as long as it is a compound that prevents polymerization by reacting with radicals generated from a photopolymerization initiator, a thermal radical polymerization initiator, etc., and is not limited to quinone, piperidine, hinders. A dophenol type, a nitroso type, etc. can be used. Specifically, naphthoquinone, 2-hydroxynaphthoquinone, 2-methylnaphthoquinone, 2-methoxynaphthoquinone, 2,2,6,6, -tetramethylpiperidine-1-oxyl, 2,2,6,6, -tetramethyl -4-hydroxypiperidine-1-oxyl, 2,2,6,6, -tetramethyl-4-methoxypiperidine-1-oxyl, 2,2,6,6, -tetramethyl-4-phenoxypiperidine-1- Oxyl, hydroquinone, 2-methylhydroquinone, 2-methoxyhydroquinone, parabenzoquinone, butylated hydroxyanisole, 2,6-di-t-butyl-4-ethylphenol, 2,6-di-t-butylcresol, stearyl β -(3,5-di-t-butyl-4-hydroxyphenyl) propionate, 2,2'-methylene (4-ethyl-6-tert-butylphenol), 4,4′-thiobis-3-methyl-6-tert-butylphenol), 4,4′-butylidenebis (3-methyl-6-tert-butylphenol), 3 , 9-bis [1,1-dimethyl-2- [β- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy] ethyl], 2,4,8,10-tetraoxaspiro [ 5,5] undecane, tetrakis- [methylene-3- (3 ′, 5′-di-t-butyl-4′-hydroxyphenylpropionate) methane, 1,3,5-tris (3 ′, 5′- Di-t-butyl-4′-hydroxybenzyl) -sec-triazine-2,4,6- (1H, 3H, 5H) trione, paramethoxyphenol, 4-methoxy-1-naphthol, thiodiphenylamine, N-nitroso Examples include, but are not limited to, an aluminum salt of phenylhydroxyamine, trade name ADK STAB LA-81, trade name ADK STAB LA-82 (manufactured by Adeka Corporation), and the like. Of these, naphthoquinone, hydroquinone, and nitroso piperazine radical polymerization inhibitors are preferred, and naphthoquinone, 2-hydroxynaphthoquinone, hydroquinone, 2,6-di-tert-butyl-P-cresol, Polystop 7300P (Hakuto Co., Ltd.) Company-made) is more preferred, and Polystop 7300P (made by Hakuto Co., Ltd.) is most preferred.
The radical polymerization inhibitor has a method of adding when synthesizing the component (c) and a method of dissolving it in the component (c) during the production of the liquid crystal sealant. In order to obtain a more effective effect, the liquid crystal seal It is preferable to dissolve in the component (c) during the production of the agent.
The content of the radical polymerization inhibitor is preferably 0.0001 to 1% by mass, more preferably 0.001 to 0.5% by mass, and 0.01 to 0.2% by mass in the total amount of the liquid crystal sealant of the present invention. Is particularly preferred.
上記硬化促進剤としては、有機酸やイミダゾール等を挙げることができる。
有機酸としては、有機カルボン酸や有機リン酸等が挙げられるが、有機カルボン酸である場合が好ましい。具体的には、フタル酸、イソフタル酸、テレフタル酸、トリメリット酸、ベンゾフェノンテトラカルボン酸、フランジカルボン酸等の芳香族カルボン酸、コハク酸、アジピン酸、ドデカン二酸、セバシン酸、チオジプロピオン酸、シクロヘキサンジカルボン酸、トリス（２−カルボキシメチル）イソシアヌレート、トリス（２−カルボキシエチル）イソシアヌレート、トリス（２−カルボキシプロピル）イソシアヌレート、ビス（２−カルボキシエチル）イソシアヌレート等を挙げることができる。
また、イミダゾール化合物としては、２−メチルイミダゾール、２−フェニルイミダゾール、２−ウンデシルイミダゾール、２−ヘプタデシルイミダゾール、２−フェニル−４−メチルイミダゾール、１−ベンジル−２−フェニルイミダゾール、１−ベンジル−２−メチルイミダゾール、１−シアノエチル−２−メチルイミダゾール、１−シアノエチル−２−フェニルイミダゾール、１−シアノエチル−２−ウンデシルイミダゾール、２，４−ジアミノ−６（２’−メチルイミダゾール（１’））エチル−ｓ−トリアジン、２，４−ジアミノ−６（２’−ウンデシルイミダゾール（１’））エチル−ｓ−トリアジン、２
，４−ジアミノ−６（２ ’−エチル−４−メチルイミダゾール（１’））エチル−ｓ−トリアジン、２，４− ジアミノ−６（２’−メチルイミダゾール（１ ’））エチル−ｓ−トリアジン・イソシアヌル酸付加物、２−メチルイミダゾールイソシアヌル酸の２：３付加物、２−フェニルイミダゾールイソシアヌル酸付加物、２−フェニル−３，５−ジヒドロキシメチルイミダゾール、２−フェニル−４−ヒドロキシメチル−５−メチルイミダゾール、１−シアノエチル−２−フェニル−３，５−ジシアノエトキシメチルイミダゾール等が挙げられる。
硬化促進剤を使用する場合には、液晶シール剤の総量を１００質量部とした場合に、通常０．１〜１０質量％、好ましくは１〜５質量％である。
Examples of the curing accelerator include organic acids and imidazoles.
Examples of the organic acid include organic carboxylic acids and organic phosphoric acids, but organic carboxylic acids are preferred. Specifically, aromatic carboxylic acids such as phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, benzophenone tetracarboxylic acid, furandicarboxylic acid, succinic acid, adipic acid, dodecanedioic acid, sebacic acid, thiodipropionic acid , Cyclohexanedicarboxylic acid, tris (2-carboxymethyl) isocyanurate, tris (2-carboxyethyl) isocyanurate, tris (2-carboxypropyl) isocyanurate, bis (2-carboxyethyl) isocyanurate and the like. .
Examples of imidazole compounds include 2-methylimidazole, 2-phenylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-phenyl-4-methylimidazole, 1-benzyl-2-phenylimidazole, and 1-benzyl. 2-methylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-phenylimidazole, 1-cyanoethyl-2-undecylimidazole, 2,4-diamino-6 (2′-methylimidazole (1 ′ )) Ethyl-s-triazine, 2,4-diamino-6 (2'-undecylimidazole (1 ')) ethyl-s-triazine, 2
, 4-Diamino-6 (2'-ethyl-4-methylimidazole (1 ')) ethyl-s-triazine, 2,4-Diamino-6 (2'-methylimidazole (1')) ethyl-s-triazine Isocyanuric acid adduct, 2-methylimidazole isocyanuric acid 2: 3 adduct, 2-phenylimidazole isocyanuric acid adduct, 2-phenyl-3,5-dihydroxymethylimidazole, 2-phenyl-4-hydroxymethyl-5 -Methylimidazole, 1-cyanoethyl-2-phenyl-3,5-dicyanoethoxymethylimidazole and the like.
When using a hardening accelerator, when the total amount of a liquid-crystal sealing compound is 100 mass parts, it is 0.1-10 mass% normally, Preferably it is 1-5 mass%.
本発明の液晶表示セルは、基板に所定の電極を形成した一対の基板を所定の間隔に対向配置し、周囲を本発明の液晶シール剤でシールし、その間隙に液晶が封入されたものである。封入される液晶の種類は特に限定されない。ここで、基板とはガラス、石英、プラスチック、シリコン等からなる少なくとも一方に光透過性がある組み合わせの基板から構成される。その製法としては、液晶シール剤に、グラスファイバー等のスペーサー（間隙制御材）を添加後、該一対の基板の一方にディスペンサー、またはスクリーン印刷装置等を用いて該液晶シール剤を塗布した後、必要に応じて、８０〜１２０℃で仮硬化を行う。その後、該液晶シール剤の堰の内側に液晶を滴下し、真空中にてもう一方のガラス基板を重ね合わせ、ギャップ出しを行う。ギャップ形成後、必要に応じて１０００ｍＪ／ｃｍ２〜６０００ｍＪ／ｃｍ２の紫外線を照射し、その後９０〜１３０℃で１〜２時間硬化することにより本発明の液晶表示セルを得ることができる。このようにして得られた本発明の液晶表示セルは、液晶汚染による表示不良が無く、接着性、耐湿信頼性に優れたものである。スペーサとしては、例えばグラスファイバー、シリカビーズ、ポリマービーズ等があげられる。その直径は、目的に応じ異なるが、通常２〜８μｍ、好ましくは４〜７μｍである。その使用量は、本発明の液晶シール剤１００質量％に対し通常０．１〜４質量％、好ましくは０．５〜２質量％、更に、好ましくは０．９〜１．５質量％程度である。 The liquid crystal display cell of the present invention is a cell in which a pair of substrates having predetermined electrodes formed on a substrate are arranged opposite to each other at a predetermined interval, the periphery is sealed with the liquid crystal sealant of the present invention, and the liquid crystal is sealed in the gap. is there. The kind of liquid crystal to be sealed is not particularly limited. Here, the substrate is composed of a combination of substrates made of at least one of glass, quartz, plastic, silicon, etc. and having light transmission properties. As a manufacturing method thereof, after adding a spacer (gap control material) such as glass fiber to the liquid crystal sealing agent, the liquid crystal sealing agent is applied to one of the pair of substrates using a dispenser or a screen printing apparatus, If necessary, temporary curing is performed at 80 to 120 ° C. Thereafter, a liquid crystal is dropped inside the weir of the liquid crystal sealant, and the other glass substrate is overlaid in a vacuum to create a gap. After gap formation, as required by irradiation with ultraviolet rays of 1000mJ / cm 2 ~6000mJ / cm 2 , it can then obtain a liquid crystal display cell of the present invention by curing for 1-2 hours at 90 to 130 ° C.. The liquid crystal display cell of the present invention thus obtained has no display defects due to liquid crystal contamination, and has excellent adhesion and moisture resistance reliability. Examples of the spacer include glass fiber, silica beads, and polymer beads. The diameter varies depending on the purpose, but is usually 2 to 8 μm, preferably 4 to 7 μm. The amount used is usually 0.1 to 4% by mass, preferably 0.5 to 2% by mass, and more preferably about 0.9 to 1.5% by mass with respect to 100% by mass of the liquid crystal sealant of the present invention. is there.
本発明の液晶表示セルの製造方法に使用される液晶シール剤は、例えば次の方法によって得ることができる。まず、成分（ｃ）に必要に応じ、成分（ｇ）を溶解混合する。次いでこの混合物に必要に応じて成分（ｆ）を溶解する。次いで成分（ａ）及び（ｂ）、また必要に応じて、成分（ｄ）、（ｅ）、消泡剤、レベリング剤、溶剤等を添加し、公知の混合装置、例えば３本ロール、サンドミル、ボールミル等により均一に混合し、金属メッシュにて濾過する。 The liquid crystal sealing agent used in the method for producing a liquid crystal display cell of the present invention can be obtained, for example, by the following method. First, a component (g) is melt-mixed with a component (c) as needed. Next, component (f) is dissolved in this mixture as necessary. Next, components (a) and (b), and if necessary, components (d) and (e), an antifoaming agent, a leveling agent, a solvent and the like are added, and a known mixing apparatus such as a three-roll, sand mill, Mix evenly with a ball mill or the like, and filter through a metal mesh.
本発明の液晶シール剤は、フィラーの凝集物が無い為、ディスペンスやスクリーン印刷といった塗布作業性に優れ、また液晶表示セルのセルギャップ不良を引き起こさない。また、液晶の差込への耐性も良好であり、液晶滴下工法における基板の貼り合せ工程、加熱工程においても液晶が差し込んだり、シールが決壊したりする現象をおこさない。従って、安定した液晶表示セルの作成が可能である。また、構成成分の液晶への溶出も極めて少なく、液晶表示セルの表示不良を低減することが可能である。また、保存安定性にも優れる為、液晶表示セルの製造に適している。更に、その硬化物は接着強度、耐熱性、耐湿性等の各種硬化物特性にも優れる、特に透湿度は非常に低い。従って、本発明の液晶シール剤を用いることにより、信頼性に優れる液晶表示セルを作成することが可能である。また、本発明の液晶シール剤を用いて作成した液晶表示セルは、電圧保持率が高く、イオン密度が低いという液晶表示セルとして必要な特性も充足される。 Since the liquid crystal sealant of the present invention is free of filler aggregates, it has excellent coating workability such as dispensing and screen printing, and does not cause a cell gap defect of a liquid crystal display cell. Moreover, the tolerance to the insertion of the liquid crystal is also good, and the phenomenon that the liquid crystal is inserted or the seal is broken in the bonding process and heating process of the substrate in the liquid crystal dropping method does not occur. Therefore, a stable liquid crystal display cell can be produced. Further, the elution of the constituent components into the liquid crystal is extremely small, and display defects of the liquid crystal display cell can be reduced. Moreover, since it is excellent also in storage stability, it is suitable for manufacture of a liquid crystal display cell. Furthermore, the cured product is excellent in various cured product properties such as adhesive strength, heat resistance, and moisture resistance, and particularly has a very low moisture permeability. Therefore, by using the liquid crystal sealant of the present invention, it is possible to produce a liquid crystal display cell with excellent reliability. In addition, the liquid crystal display cell prepared using the liquid crystal sealant of the present invention satisfies the characteristics required for a liquid crystal display cell having a high voltage holding ratio and a low ion density.
本発明の液晶表示セルの製造方法は、液晶の液晶シール剤への差し込みが極めて少ない為、熱のみによる液晶滴下工法への適用も可能であり、生産タクト等の観点から、より好ましい。 The method for producing a liquid crystal display cell of the present invention is more preferable from the viewpoint of production tact and the like because it can be applied to a liquid crystal dropping method only by heat because the insertion of liquid crystal into a liquid crystal sealant is extremely small.
以下、合成例、実施例により本発明を更に詳細に説明するが、本発明は実施例に限定されるものではない。なお、特別の記載のない限り、本文中「部」及び「％」とあるのは質量基準である。 EXAMPLES Hereinafter, although a synthesis example and an Example demonstrate this invention still in detail, this invention is not limited to an Example. Unless otherwise specified, “part” and “%” in the text are based on mass.
[合成例１]
[レゾルシンジグリシジルエーテルの全アクリル化物の合成]
レゾルシンジグリシジルエーテル１８１．２ｇ（ＥＸ−２０１：ナガセケムテックス株式会社製）をトルエン２６６．８ｇに溶解し、これに重合禁止剤としてジブチルヒドロキシトルエン０．８ｇを加え、６０℃まで昇温した。その後、エポキシ基の１００％当量のアクリル酸１１７．５ｇを加え更に８０℃まで昇温し、これに反応触媒であるトリメチルアンモニウムクロライド０．６ｇを添加して、９８℃で約３０時間攪拌し、反応液を得た。この反応液を水洗し、トルエンを留去することにより、目的とするレゾルシンジグリシジルエーテルのエポキシアクリレート２９３ｇを得た。得られたエポキシアクリレートの反応性基当量は理論値で１８３である。
[Synthesis Example 1]
[Synthesis of total acrylate of resorcin diglycidyl ether]
Resorcin diglycidyl ether 181.2 g (EX-201: manufactured by Nagase ChemteX Corporation) was dissolved in 266.8 g of toluene, and 0.8 g of dibutylhydroxytoluene was added thereto as a polymerization inhibitor, and the temperature was raised to 60 ° C. Thereafter, 117.5 g of acrylic acid with 100% equivalent of epoxy group was added and the temperature was further raised to 80 ° C., 0.6 g of trimethylammonium chloride as a reaction catalyst was added thereto, and the mixture was stirred at 98 ° C. for about 30 hours, A reaction solution was obtained. This reaction solution was washed with water, and toluene was distilled off to obtain 293 g of the desired resorcin diglycidyl ether epoxy acrylate. The reactive group equivalent of the obtained epoxy acrylate is 183 in theory.
[合成例２]
[１, ２−ビス（トリメチルシロキシ）−１，１, ２，２−テトラフェニルエタンの合成]
市販ベンゾピナコール（東京化成製）１００部（０．２８モル）をジメチルホルムアルデヒド３５０部に溶解させた。これに塩基触媒としてピリジン３２部（０．４モル）、シリル化剤としてＢＳＴＦＡ（信越化学工業製）１５０部（０．５８モル）を加え７０℃まで昇温し、２時間攪拌した。得られた反応液を冷却し、攪拌しながら、水２００部を入れ、生成物を沈殿させると共に未反応シリル化剤を失活させた。沈殿した生成物をろ別分離した後十分に水洗した。次いで得られた生成物をアセトンに溶解し、水を加えて再結晶させ、精製した。目的の１, ２−ビス（トリメチルシロキシ）−１，１, ２，２−テトラフェニルエタンを１０５．６部（収率８８．３％）得た。
ＨＰＬＣ(高速液体クロマトグラフィー）で分析した結果、純度は９９．０％（面積百分率）であった。
[Synthesis Example 2]
[Synthesis of 1,2-bis (trimethylsiloxy) -1,1,2,2-tetraphenylethane]
100 parts (0.28 mol) of commercially available benzopinacol (manufactured by Tokyo Chemical Industry) was dissolved in 350 parts of dimethylformaldehyde. To this was added 32 parts (0.4 mol) of pyridine as a base catalyst and 150 parts (0.58 mol) of BSTFA (manufactured by Shin-Etsu Chemical Co., Ltd.) as a silylating agent, and the mixture was heated to 70 ° C. and stirred for 2 hours. The obtained reaction solution was cooled and stirred while adding 200 parts of water to precipitate the product and deactivate the unreacted silylating agent. The precipitated product was separated by filtration and thoroughly washed with water. Subsequently, the obtained product was dissolved in acetone, recrystallized by adding water and purified. 105.6 parts (yield 88.3%) of the desired 1,2-bis (trimethylsiloxy) -1,1,2,2-tetraphenylethane were obtained.
As a result of analysis by HPLC (high performance liquid chromatography), the purity was 99.0% (area percentage).
[実施例１〜７、比較例１〜２]
下記表１に示す量の成分、（ａ）、（ｂ）等を用い、液晶シール剤の製造を行った。製造方法は以下に示す通りである。
まず、成分（ｃ）に成分（ｇ）を加熱溶解混合し、室温まで冷却後、成分（ｆ）を添加し攪拌した。その後成分（ａ）、（ｂ）、（ｄ）、（ｅ）、硬化促進剤を順次添加し、３本ロールにより均一に混合した。
[Examples 1-7, Comparative Examples 1-2]
A liquid crystal sealant was produced using the components shown in Table 1 below (a), (b) and the like. The manufacturing method is as follows.
First, component (g) was heated and dissolved and mixed in component (c), and after cooling to room temperature, component (f) was added and stirred. Thereafter, components (a), (b), (d), (e), and a curing accelerator were sequentially added and mixed uniformly with three rolls.
実施例１〜７、比較例１〜２で調製した液晶シール剤について、以下の評価を行った。結果を表２にまとめる。 The following evaluation was performed about the liquid crystal sealing agent prepared in Examples 1-7 and Comparative Examples 1-2. The results are summarized in Table 2.
[ろ過性試験]
凝集物の存在を評価する方法として、ろ過性試験を実施した。
これは、上記実施例１〜７、比較例１〜２で調整した液晶シール剤４ｇを６ｍｍΦの６３５メッシュの金メッシュでろ過し、時間とろ過量を測定する方法である。凝集物の多い液晶シール剤は次第にメッシュが詰まってくるため、ろ過速度が遅くなるが、分散されている液晶シール剤は一定の速度でろ過することができる
ろ過性の評価
○：シール剤４ｇが一定の速度でろ過できる。
△：シール剤４ｇが徐々に速度が遅くなるがろ過できる。
×：シール剤４ｇがろ過できず詰まってしまう。
[Filterability test]
A filterability test was performed as a method for evaluating the presence of aggregates.
This is a method of filtering the liquid crystal sealant 4g prepared in Examples 1 to 7 and Comparative Examples 1 and 2 with a 635 mesh gold mesh of 6 mmΦ, and measuring the time and the filtration amount. Since the liquid crystal sealant with a lot of aggregates gradually clogs the mesh, the filtration rate becomes slow, but the dispersed liquid crystal sealant can be filtered at a constant rate. Filter at a constant rate.
(Triangle | delta): Although 4 g of sealing agents slows down gradually, it can filter.
X: 4 g of sealing agent cannot be filtered and clogs.
[接着強度試験]
凝集物が存在すると液晶シール剤中での均一性がなくなるため接着強度が低下するが、均一に分散されている液晶シール剤は偏りがなくなるため接着強度が向上する。
液晶シール剤１００ｇにスペーサーとして直径３μｍのグラスファイバー（ＰＦ−３０Ｓ：日本電気硝子株式会社製）１ｇを添加して混合撹拌を行う。この液晶シール剤を５０ｍｍ×５０ｍｍのガラス基板上に塗布し、その液晶シール剤上に１．５ｍｍ×１．５ｍｍのガラス片を貼り合わせ、１２０℃オーブンに１時間投入して硬化させた。そのガラス片のせん断接着強度をボンドテスター（ＳＳ−３０ＷＤ：西進商事株式会社製）を使用して測定した。その結果を表２に示す。
[Adhesive strength test]
If aggregates are present, the uniformity in the liquid crystal sealant is lost and the adhesive strength is reduced. However, the uniformly dispersed liquid crystal sealant is not biased, and the adhesive strength is improved.
1 g of glass fiber (PF-30S: manufactured by Nippon Electric Glass Co., Ltd.) having a diameter of 3 μm is added as a spacer to 100 g of the liquid crystal sealant and mixed and stirred. This liquid crystal sealant was applied onto a 50 mm × 50 mm glass substrate, a 1.5 mm × 1.5 mm glass piece was bonded onto the liquid crystal sealant, and cured by placing in a 120 ° C. oven for 1 hour. The shear adhesive strength of the glass piece was measured using a bond tester (SS-30WD: manufactured by Seishin Shoji Co., Ltd.). The results are shown in Table 2.
表２の結果より、本発明による実施例の液晶滴下工法用液晶シール剤は、凝集物がなく、ろ過速度が落ちない結果となった。これに対し、比較例の液晶シール剤は凝集物の存在から、ろ過性が徐々に落ちていることが分かる。
また、本発明の液晶シール剤は接着強度についても、優れることが確認された。
From the results shown in Table 2, the liquid crystal sealant for the liquid crystal dropping method of the examples according to the present invention had no aggregates and the filtration rate did not decrease. On the other hand, it can be seen that the filterability of the liquid crystal sealant of the comparative example gradually falls due to the presence of aggregates.
Moreover, it was confirmed that the liquid crystal sealing agent of the present invention is excellent also in adhesive strength.
本発明の液晶滴下工法用液晶シール剤は、フィラーの凝集物が無い為、ディスペンスやスクリーン印刷といった塗布作業性に優れ、また液晶表示セルのセルギャップ不良を引き起こさない。また、液晶の差込への耐性も良好であり、液晶滴下工法における基板の貼り合せ工程、加熱工程においても液晶が差し込んだり、シールが決壊したりする現象をおこさない。従って、安定した液晶表示セルの作成が可能である。更に接着強度等のような液晶シール剤としての一般的な特性においても優れる液晶滴下工法用液晶シール剤であり、長期信頼性に優れる液晶表示セルの製造を容易にすることができる。 Since the liquid crystal sealing agent for liquid crystal dropping method of the present invention has no filler aggregate, it is excellent in application workability such as dispensing and screen printing, and does not cause a cell gap defect of a liquid crystal display cell. Moreover, the tolerance to the insertion of the liquid crystal is also good, and the phenomenon that the liquid crystal is inserted or the seal is broken in the bonding process and heating process of the substrate in the liquid crystal dropping method does not occur. Therefore, a stable liquid crystal display cell can be produced. Furthermore, it is a liquid crystal sealing agent for a liquid crystal dropping method that is excellent in general characteristics as a liquid crystal sealing agent such as adhesive strength, and can facilitate the production of a liquid crystal display cell having excellent long-term reliability.
Claims (15)
前記硬化性化合物（ｃ）が一分子中に（メタ）アクリロイル基を３個以上有する化合物であり、
Ａ［μｍ］及びＢ［μｍ］が、下記式（Ｉ）及び（ＩＩ）で表される条件を満たす液晶滴下工法用液晶シール剤。
３μｍ≦Ａ≦２０μｍ・・・（Ｉ）
０．０００５×Ａ≦Ｂ≦０．０２×Ａ・・・ （ＩＩ） Containing a filler (a) having an average particle size A [μm], a filler (b) having an average particle size B [μm], and a curable compound (c),
The curable compound (c) is a compound having three or more (meth) acryloyl groups in one molecule,
A liquid crystal sealant for a liquid crystal dropping method in which A [μm] and B [μm] satisfy the conditions represented by the following formulas (I) and (II).
3 μm ≦ A ≦ 20 μm (I)
0.0005 × A ≦ B ≦ 0.02 × A (II)
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| TW103140191A TW201530234A (en) | 2014-01-20 | 2014-11-20 | Liquid crystal sealing agent and liquid crystal display cell using the same |
| KR1020140184413A KR102175445B1 (en) | 2014-01-20 | 2014-12-19 | Liquid crystal sealing agent and liquid crystal display cell using same, and manufacturing method for liquid crystal display cell |
| CN201510025773.XA CN104789165B (en) | 2014-01-20 | 2015-01-19 | Liquid crystal sealing agent and the liquid crystal display for using the liquid crystal sealing agent |
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| JPH0820627B2 (en) | 1987-01-20 | 1996-03-04 | 松下電器産業株式会社 | Liquid crystal display element manufacturing method |
| JPH10239694A (en) | 1997-02-24 | 1998-09-11 | Hitachi Ltd | Production of liquid crystal display device |
| JP2006023419A (en) | 2004-07-07 | 2006-01-26 | Shin Etsu Chem Co Ltd | Sealant composition for liquid crystal display cells |
| KR20080095077A (en) * | 2007-04-23 | 2008-10-28 | 삼성전자주식회사 | Sealant, liquid crystal display having the same and method of fabricating the same |
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| KR20100118518A (en) * | 2009-04-28 | 2010-11-05 | 닛뽄 가야쿠 가부시키가이샤 | Sealant for liquid crystal, and liquid crystal displaycell made with the same |
| JP5257941B2 (en) * | 2009-04-28 | 2013-08-07 | 日本化薬株式会社 | Liquid crystal sealant and liquid crystal display cell using the same |
| WO2011001895A1 (en) * | 2009-07-01 | 2011-01-06 | 日本化薬株式会社 | Liquid crystal sealing agent for liquid crystal dropping method and liquid crystal display cell using same |
| CN104031082A (en) * | 2009-11-17 | 2014-09-10 | 日本化药株式会社 | Novel thermal radical generator, method for producing the same, liquid crystal sealing agent, and liquid crystal display cell |
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