WO2017119406A1 - 液晶表示素子用シール剤、上下導通材料、及び、液晶表示素子 - Google Patents
液晶表示素子用シール剤、上下導通材料、及び、液晶表示素子 Download PDFInfo
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- WO2017119406A1 WO2017119406A1 PCT/JP2017/000004 JP2017000004W WO2017119406A1 WO 2017119406 A1 WO2017119406 A1 WO 2017119406A1 JP 2017000004 W JP2017000004 W JP 2017000004W WO 2017119406 A1 WO2017119406 A1 WO 2017119406A1
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- liquid crystal
- crystal display
- meth
- acrylate
- display element
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Classifications
-
- 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
-
- 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
- C08F2/44—Polymerisation in the presence of compounding ingredients, e.g. plasticisers, dyestuffs, fillers
-
- 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F290/00—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups
- C08F290/02—Macromolecular compounds obtained by polymerising monomers on to polymers modified by introduction of aliphatic unsaturated end or side groups on to polymers modified by introduction of unsaturated end groups
- C08F290/06—Polymers provided for in subclass C08G
-
- 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
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/37—Thiols
- C08K5/378—Thiols containing heterocyclic rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/062—Copolymers with monomers not covered by C08L33/06
- C08L33/068—Copolymers with monomers not covered by C08L33/06 containing glycidyl groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
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- 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
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- 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
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/32—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals
- C08F220/325—Esters containing oxygen in addition to the carboxy oxygen containing epoxy radicals containing glycidyl radical, e.g. glycidyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2200/00—Chemical nature of materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K2200/06—Macromolecular organic compounds, e.g. prepolymers
- C09K2200/0645—Macromolecular organic compounds, e.g. prepolymers obtained otherwise than by reactions involving carbon-to-carbon unsaturated bonds
- C09K2200/0647—Polyepoxides
Definitions
- the present invention relates to a sealing agent for a liquid crystal display element that is excellent in coating properties, moisture permeation prevention properties, and adhesiveness, and can suppress liquid crystal contamination. Moreover, this invention relates to the vertical conduction material and liquid crystal display element which use this sealing compound for liquid crystal display elements.
- a rectangular seal pattern is formed on one of two transparent substrates with electrodes by dispensing.
- a liquid crystal micro-droplet is dropped on the entire surface of the transparent substrate frame in a state where the sealant is uncured, and the other transparent substrate is immediately overlaid, and the seal portion is irradiated with light such as ultraviolet rays for temporary curing. .
- heating is performed to perform main curing, and a liquid crystal display element is manufactured.
- a liquid crystal display element can be manufactured with extremely high efficiency by bonding the substrates under a reduced pressure, and this dropping method is currently the mainstream method for manufacturing liquid crystal display elements.
- the position of the seal portion is arranged under the black matrix (hereinafter also referred to as a narrow frame design).
- the sealant is placed directly under the black matrix, so when the dripping method is used, the light irradiated when photocuring the sealant is blocked, and the light does not reach the inside of the sealant. There was a problem that the curing was insufficient. If the sealant is insufficiently cured in this manner, the uncured sealant component is eluted in the liquid crystal, and the curing reaction by the eluted sealant component proceeds in the liquid crystal, resulting in liquid crystal contamination. there were.
- An object of this invention is to provide the sealing compound for liquid crystal display elements which is excellent in applicability
- Another object of the present invention is to provide a vertical conduction material and a liquid crystal display element using the sealing agent for a liquid crystal display element.
- the present invention is a sealing agent for a liquid crystal display element containing a curable resin and a radical polymerization initiator and / or a thermosetting agent, wherein the curable resin is a compound represented by the following formula (1). It is a sealing compound for liquid crystal display elements which is contained and the content of the compound represented by the formula (1) in the sealing compound for liquid crystal display elements is 1% by weight or more and less than 30% by weight.
- R 1 is hydrogen or a methyl group
- m and n are each 0 to 6.
- the present inventor has studied the blending of a bisphenol S-type epoxy resin having excellent adhesion and low liquid crystal contamination as a curable resin.
- a bisphenol S-type epoxy resin having excellent adhesion and low liquid crystal contamination as a curable resin.
- the present inventors have a liquid crystal display element that is excellent in coating property, moisture permeation prevention property, and adhesiveness and can suppress liquid crystal contamination by blending a specific amount of a specific compound having a bisphenol S-type structure.
- the present inventors have found that a sealant can be obtained and have completed the present invention.
- the sealing agent for liquid crystal display elements of this invention contains curable resin.
- the said curable resin contains the compound represented by the said Formula (1).
- the sealing agent for liquid crystal display elements of the present invention is excellent in the effect of suppressing adhesiveness and liquid crystal contamination.
- m and n are each 0 to 6.
- M and n are each preferably 1 to 6, and more preferably 1 to 3, respectively.
- the value of m and n in the said Formula (1) and Formula (2) mentioned later is an average value.
- the case where m and n are 0 means that the ethylene oxide structure portion to which m or n is attached becomes a bond.
- a compound represented by the above formula (1) for example, by reacting bisphenol S or ethylene oxide-added bisphenol S with epichlorohydrin, a compound represented by the following formula (2) is produced, Examples thereof include a method of reacting one epoxy group of the obtained compound represented by the formula (2) with (meth) acrylic acid.
- the “(meth) acryl” means acryl or methacryl.
- n and n are each 0 to 6.
- the content of the compound represented by the above formula (1) in the sealant for liquid crystal display elements of the present invention is 1% by weight or more and less than 30% by weight.
- the obtained sealing agent for liquid crystal display elements tends to be inferior in adhesiveness.
- the content of the compound represented by the above formula (1) is 30% by weight or more, the obtained sealant for a display element is inferior in applicability and moisture permeability prevention.
- the preferable lower limit of the content of the compound represented by the formula (1) is 5% by weight, the preferable upper limit is 25% by weight, the more preferable lower limit is 10% by weight, the more preferable upper limit is 20% by weight, and the further preferable upper limit is 15% by weight. %.
- the curable resin preferably contains other curable resin in addition to the compound represented by the formula (1).
- the other curable resin include (meth) acrylic compounds and epoxy compounds other than the compound represented by the above formula (1).
- (meth) acrylate” means acrylate or methacrylate
- epoxy (meth) acrylate” means that all epoxy groups in the epoxy compound are reacted with (meth) acrylic acid. Represents a compound.
- Examples of the (meth) acrylic compound that is the other curable resin include epoxy (meth) acrylate obtained by reacting (meth) acrylic acid and an epoxy compound, and a compound having a hydroxyl group in (meth) acrylic acid.
- (Meth) acrylate is preferred.
- the (meth) acrylic compound preferably has two or more (meth) acryloyl groups in the molecule because of its high reactivity.
- Examples of the epoxy (meth) acrylate include those obtained by reacting an epoxy compound and (meth) acrylic acid in the presence of a basic catalyst according to a conventional method.
- Examples of the epoxy compound used as a raw material for synthesizing the epoxy (meth) acrylate include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol E type epoxy resin, bisphenol S type epoxy resin, and 2,2′- Diallyl bisphenol A type epoxy resin, hydrogenated bisphenol type epoxy resin, propylene oxide added bisphenol A type epoxy resin, resorcinol type epoxy resin, biphenyl type epoxy resin, sulfide type epoxy resin, diphenyl ether type epoxy resin, dicyclopentadiene type epoxy resin, Naphthalene type epoxy resin, phenol novolac type epoxy resin, orthocresol novolac type epoxy resin, dicyclopentadiene novolac type epoxy resin, biphenyl Novolak type epoxy resins, naphthalene phenol novolac-type epoxy resin, glycidyl amine type epoxy resin, alkyl polyol type epoxy resin, rubber-modified epoxy resins, glycidyl ester compounds.
- a res
- Examples of commercially available 2,2′-diallylbisphenol A type epoxy resins include RE-810NM (manufactured by Nippon Kayaku Co., Ltd.). As what is marketed among the said hydrogenated bisphenol type
- Examples of commercially available propylene oxide-added bisphenol A type epoxy resins include EP-4000S (manufactured by ADEKA).
- Examples of commercially available resorcinol type epoxy resins include EX-201 (manufactured by Nagase ChemteX Corporation). Examples of commercially available biphenyl type epoxy resins include jER YX-4000H (manufactured by Mitsubishi Chemical Corporation).
- Examples of commercially available sulfide type epoxy resins include YSLV-50TE (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.).
- Examples of commercially available diphenyl ether type epoxy resins include YSLV-80DE (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.).
- Examples of commercially available dicyclopentadiene type epoxy resins include EP-4088S (manufactured by ADEKA).
- Examples of commercially available naphthalene type epoxy resins include Epicron HP4032, Epicron EXA-4700 (both manufactured by DIC) and the like.
- Examples of commercially available phenol novolac epoxy resins include Epicron N-770 (manufactured by DIC).
- Examples of the ortho-cresol novolac type epoxy resin that are commercially available include epiclone N-670-EXP-S (manufactured by DIC). As what is marketed among the said dicyclopentadiene novolak-type epoxy resins, epiclone HP7200 (made by DIC) etc. are mentioned, for example.
- Examples of commercially available biphenyl novolac epoxy resins include NC-3000P (manufactured by Nippon Kayaku Co., Ltd.). Examples of commercially available naphthalene phenol novolac type epoxy resins include ESN-165S (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.).
- Examples of commercially available glycidylamine type epoxy resins include jER630 (manufactured by Mitsubishi Chemical), Epicron 430 (manufactured by DIC), and TETRAD-X (manufactured by Mitsubishi Gas Chemical).
- Examples of commercially available alkyl polyol type epoxy resins include ZX-1542 (manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.), Epiklon 726 (manufactured by DIC), Epolite 80MFA (manufactured by Kyoeisha Chemical Co., Ltd.), Denacol EX-611. (Manufactured by Nagase ChemteX Corporation).
- Examples of commercially available rubber-modified epoxy resins include YR-450, YR-207 (both manufactured by Nippon Steel & Sumikin Chemical Co., Ltd.), Epolide PB (manufactured by Daicel Corporation), and the like.
- Examples of commercially available glycidyl ester compounds include Denacol EX-147 (manufactured by Nagase ChemteX Corporation).
- Other commercially available epoxy compounds include, for example, YDC-1312, YSLV-80XY, YSLV-90CR (all manufactured by NS Also, Mitsubishi Chemical Corporation), EXA-7120 (DIC Corporation), TEPIC (Nissan Chemical Corporation) and the like.
- Examples of commercially available epoxy (meth) acrylates include EBECRYL860, EBECRYL3200, EBECRYL3201, EBECRYL3412, EBECRYL3600, EBECRYL3700, EBECRYL3701, EBECRY3702, EBECRY3703, EBECRYL3701, EBECRYL3701.
- EA-1010, EA-1020, EA-5323, EA-5520, EA-CHD, EMA-1020 (all manufactured by Shin-Nakamura Chemical Co., Ltd.), Epoxy ester M-600A, Epoxy ester 40EM, Epoxy ester 70PA Epoxy ester 200PA Xyester 80MFA, Epoxy ester 3002M, Epoxy ester 3002A, Epoxy ester 1600A, Epoxy ester 3000M, Epoxy ester 3000A, Epoxy ester 200EA, Epoxy ester 400EA (all manufactured by Kyoeisha Chemical Co., Ltd.), Denacol acrylate DA-141, Denacol acrylate DA-314, Denacol acrylate DA-911 (all manufactured by Nagase ChemteX Corporation) and the like.
- Examples of the monofunctional compounds among the (meth) acrylic acid ester compounds include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, and isobutyl (meth) acrylate.
- Examples of the bifunctional compound among the (meth) acrylic acid ester compounds include 1,3-butanediol di (meth) acrylate, 1,4-butanediol di (meth) acrylate, and 1,6-hexane.
- those having three or more functions include, for example, trimethylolpropane tri (meth) acrylate, ethylene oxide-added trimethylolpropane tri (meth) acrylate, propylene oxide-added trimethylolpropane tri ( (Meth) acrylate, ethylene oxide-added isocyanuric acid tri (meth) acrylate, glycerin tri (meth) acrylate, propylene oxide-added glycerol tri (meth) acrylate, pentaerythritol tri (meth) acrylate, tris (meth) acryloyloxyethyl phosphate, ditri Methylolpropane tetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol penta (meth) acrylate DOO, dipentaerythri
- urethane (meth) acrylate for example, by reacting 2 equivalents of a (meth) acrylic acid derivative having a hydroxyl group with 1 equivalent of an isocyanate compound having two isocyanate groups in the presence of a catalytic amount of a tin-based compound. Obtainable.
- isocyanate compound used as the raw material for the urethane (meth) acrylate examples include isophorone diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, and diphenylmethane-4,4.
- MDI '-Diisocyanate
- hydrogenated MDI polymeric MDI, 1,5-naphthalene diisocyanate, norbornane diisocyanate, tolidine diisocyanate, xylylene diisocyanate (XDI), hydrogenated XDI, lysine diisocyanate, triphenylmethane triisocyanate, tris (isocyanate) Phenyl) thiophosphate, tetramethylxylene diisocyanate, 1,6,11-undecanetriiso Aneto and the like.
- Examples of the isocyanate compound that is a raw material for the urethane (meth) acrylate include, for example, polyols such as ethylene glycol, propylene glycol, glycerin, sorbitol, trimethylolpropane, carbonate diol, polyether diol, polyester diol, and polycaprolactone diol. Chain-extended isocyanate compounds obtained by reaction with excess isocyanate compounds can also be used.
- Examples of the (meth) acrylic acid derivative having a hydroxyl group as a raw material for the urethane (meth) acrylate include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 2-hydroxybutyl (meth). Hydroxyalkyl (meth) acrylates such as acrylate, 4-hydroxybutyl (meth) acrylate, ethylene glycol, propylene glycol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, polyethylene glycol, etc.
- Mono (meth) acrylates of dihydric alcohols mono (meth) acrylates or di (meth) acrylates of trivalent alcohols such as trimethylolethane, trimethylolpropane and glycerin, and bisphenol A type epoxy alcohol Epoxy (meth) acrylate of rate, and the like.
- Examples of commercially available urethane (meth) acrylates include M-1100, M-1200, M-1210, M-1600 (all manufactured by Toagosei Co., Ltd.), EBECRYL210, EBECRYL220, EBECRYL230, EBECRYL270, EBECRYL1290, EBECRYL2220, EBECRYL4827, EBECRYL4842, EBECRYL4858, EBECRYL5129, EBECRYL6700, EBECRYL8402, EBECRYL8803, EBECRYL8804, EBECRYL8804 , Art resin N-1255, Art Resin UN-3320HB, Art Resin UN-7100, Art Resin UN-9000A, Art Resin UN-9000H (all manufactured by Negami Industrial Co., Ltd.), U-2HA, U-2PHA, U-3HA, U- 4HA, U-6H, U-6HA, U-6LPA, U-10H, U-15HA, U
- the epoxy compound which is the other curable resin examples include, for example, an epoxy compound which is a raw material for synthesizing the epoxy (meth) acrylate and a partial (meth) acryl modification other than the compound represented by the formula (1) An epoxy resin etc. are mentioned.
- the partial (meth) acryl-modified epoxy resin means a compound having one or more epoxy groups and (meth) acryloyl groups in one molecule, for example, two or more epoxy compounds. Can be obtained by reacting a part of the epoxy group with (meth) acrylic acid.
- Examples of commercially available partial (meth) acrylic-modified epoxy resins include UVACURE 1561 (manufactured by Daicel Ornex).
- the minimum with preferable content of the compound represented by the said Formula (1) in 100 weight part of curable resin whole is 5 weight part, and a preferable upper limit is 25 weight part.
- the content of the compound represented by the above formula (1) is within this range, the obtained sealing agent for a liquid crystal display element has an effect of suppressing applicability, adhesiveness, moisture permeation prevention, and liquid crystal contamination. It will be better.
- the minimum with more preferable content of the compound represented by said Formula (1) is 10 weight part, and a more preferable upper limit is 20 weight part.
- the content ratio of the (meth) acryloyl group and the epoxy group in the curable resin is preferably 50:50 to 95: 5.
- the sealing agent for liquid crystal display elements of this invention contains a radical polymerization initiator and / or a thermosetting agent.
- radical polymerization initiator examples include a photo radical polymerization initiator that generates radicals by light irradiation, a thermal radical polymerization initiator that generates radicals by heating, and the like.
- photo radical polymerization initiator examples include benzophenone compounds, acetophenone compounds, acylphosphine oxide compounds, titanocene compounds, oxime ester compounds, benzoin ether compounds, thioxanthone compounds, and the like.
- photo radical polymerization initiators examples include IRGACURE 184, IRGACURE 369, IRGACURE 379, IRGACURE 651, IRGACURE 819, IRGACURE 907, IRGACURE 2959, IRGACURE OXE01, all manufactured by Rusilin TPO ), NCI-930 (manufactured by ADEKA), SPEEDCURE EMK (manufactured by Nippon Sebel Hegner), benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether (all manufactured by Tokyo Chemical Industry Co., Ltd.) and the like.
- thermal radical polymerization initiator what consists of an azo compound, an organic peroxide, etc. is mentioned, for example.
- an initiator made of a polymer azo compound (hereinafter also referred to as “polymer azo initiator”) is preferable.
- the polymer azo compound means a compound having an azo group and generating a radical capable of curing a (meth) acryloyl group by heat and having a number average molecular weight of 300 or more.
- the preferable lower limit of the number average molecular weight of the polymeric azo initiator is 1000, and the preferable upper limit is 300,000.
- the more preferable lower limit of the number average molecular weight of the polymeric azo initiator is 5000, the more preferable upper limit is 100,000, the still more preferable lower limit is 10,000, and the still more preferable upper limit is 90,000.
- the said number average molecular weight is a value calculated
- polymer azo initiator examples include those having a structure in which a plurality of units such as polyalkylene oxide and polydimethylsiloxane are bonded via an azo group.
- polymer azo initiator having a structure in which a plurality of units such as polyalkylene oxide are bonded via the azo group those having a polyethylene oxide structure are preferable.
- Examples of such a polymer azo initiator include polycondensates of 4,4′-azobis (4-cyanopentanoic acid) and polyalkylene glycol, and 4,4′-azobis (4-cyanopentanoic acid) Examples thereof include polycondensates of polydimethylsiloxane having a terminal amino group, such as VPE-0201, VPE-0401, VPE-0601, VPS-0501, VPS-1001 (all of which are Wako Pure Chemical Industries, Ltd.) Manufactured) and the like.
- Examples of azo compounds that are not polymers include V-65 and V-501 (both manufactured by Wako Pure Chemical Industries, Ltd.).
- organic peroxide examples include ketone peroxide, peroxyketal, hydroperoxide, dialkyl peroxide, peroxyester, diacyl peroxide, and peroxydicarbonate.
- the content of the radical polymerization initiator is preferably 0.01 parts by weight and preferably 10 parts by weight with respect to 100 parts by weight of the curable resin.
- the content of the radical polymerization initiator is within this range, the obtained sealing agent for liquid crystal display elements is excellent in storage stability and curability while suppressing liquid crystal contamination.
- the minimum with more preferable content of the said radical polymerization initiator is 0.1 weight part, and a more preferable upper limit is 5 weight part.
- thermosetting agent examples include organic acid hydrazides, imidazole derivatives, amine compounds, polyhydric phenol compounds, acid anhydrides, and the like. Of these, organic acid hydrazide is preferably used.
- organic acid hydrazide examples include sebacic acid dihydrazide, isophthalic acid dihydrazide, adipic acid dihydrazide, malonic acid dihydrazide, and the like.
- organic acid hydrazides examples include, for example, SDH, ADH (all manufactured by Otsuka Chemical Co., Ltd.), Amicure VDH, Amicure VDH-J, Amicure UDH, Amicure UDH-J (all Ajinomoto Fine Techno Co., Ltd.) Manufactured) and the like.
- the content of the thermosetting agent is preferably 1 part by weight with respect to 100 parts by weight of the curable resin, and 50 parts by weight with respect to the preferable upper limit.
- the upper limit with more preferable content of the said thermosetting agent is 30 weight part.
- the sealing agent for liquid crystal display elements of the present invention may contain a filler for the purpose of improving viscosity, improving adhesiveness due to stress dispersion effect, improving linear expansion coefficient, improving moisture permeability of cured products, and the like. preferable.
- the filler examples include silica, talc, glass beads, asbestos, gypsum, diatomaceous earth, smectite, bentonite, montmorillonite, sericite, activated clay, alumina, zinc oxide, iron oxide, magnesium oxide, tin oxide, titanium oxide,
- Organic fillers such as calcium carbonate, magnesium carbonate, magnesium hydroxide, aluminum hydroxide, aluminum nitride, silicon nitride, barium sulfate, and calcium silicate, and organic materials such as polyester fine particles, polyurethane fine particles, vinyl polymer fine particles, and acrylic polymer fine particles A filler is mentioned.
- the minimum with preferable content of the said filler in the sealing compound for liquid crystal display elements of this invention is 10 weight%, and a preferable upper limit is 70 weight%.
- a preferable upper limit is 70 weight%.
- the more preferable lower limit of the content of the filler is 20% by weight, and the more preferable upper limit is 60% by weight.
- the sealing compound for liquid crystal display elements of this invention contains a silane coupling agent.
- the silane coupling agent mainly has a role as an adhesion assistant for favorably bonding the sealing agent and the substrate.
- silane coupling agent since it is excellent in the effect which improves adhesiveness with a board
- -Aminopropyltrimethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 3-isocyanatopropyltrimethoxysilane and the like are preferably used.
- the minimum with preferable content of the said silane coupling agent in the sealing compound for liquid crystal display elements of this invention is 0.1 weight%, and a preferable upper limit is 10 weight%.
- a preferable upper limit is 10 weight%.
- the minimum with more preferable content of the said silane coupling agent is 0.3 weight%, and a more preferable upper limit is 5 weight%.
- the sealing agent for liquid crystal display elements of the present invention may contain a light shielding agent.
- the sealing compound for liquid crystal display elements of this invention can be used suitably as a light shielding sealing agent.
- Examples of the light-shielding agent include iron oxide, titanium black, aniline black, cyanine black, fullerene, carbon black, and resin-coated carbon black. Of these, titanium black is preferable.
- Titanium black is a substance having a higher transmittance in the vicinity of the ultraviolet region, particularly for light having a wavelength of 370 to 450 nm, compared to the average transmittance for light having a wavelength of 300 to 800 nm. That is, the above-described titanium black sufficiently shields light having a wavelength in the visible light region, thereby providing a light shielding property to the sealing agent for liquid crystal display elements of the present invention, while transmitting light having a wavelength in the vicinity of the ultraviolet region.
- the light shielding agent contained in the liquid crystal display element sealant of the present invention is preferably a highly insulating material, and titanium black is also preferred as the highly insulating light shielding agent.
- the above-mentioned titanium black exhibits a sufficient effect even if it is not surface-treated, but the surface is treated with an organic component such as a coupling agent, silicon oxide, titanium oxide, germanium oxide, aluminum oxide, oxidized Surface-treated titanium black such as those coated with an inorganic component such as zirconium or magnesium oxide can also be used. Especially, what is processed with the organic component is preferable at the point which can improve insulation more.
- the liquid crystal display element produced using the sealing agent for liquid crystal display elements of the present invention containing the above-described titanium black as a light-shielding agent has sufficient light-shielding properties, and therefore has high contrast without light leakage A liquid crystal display element having excellent image display quality can be realized.
- titanium black examples include 12S, 13M, 13M-C, 13R-N, 14M-C (all manufactured by Mitsubishi Materials Corporation), Tilak D (manufactured by Ako Kasei Co., Ltd.), and the like. Can be mentioned.
- the preferable lower limit of the specific surface area of the titanium black is 13 m 2 / g, the preferable upper limit is 30 m 2 / g, the more preferable lower limit is 15 m 2 / g, and the more preferable upper limit is 25 m 2 / g.
- the preferred lower limit of the volume resistance of the titanium black is 0.5 ⁇ ⁇ cm, the preferred upper limit is 3 ⁇ ⁇ cm, the more preferred lower limit is 1 ⁇ ⁇ cm, and the more preferred upper limit is 2.5 ⁇ ⁇ cm.
- the primary particle diameter of the said light-shielding agent will not be specifically limited if it is below the distance between the board
- the more preferable lower limit of the primary particle diameter of the light shielding agent is 5 nm
- the more preferable upper limit is 200 nm
- the still more preferable lower limit is 10 nm
- the still more preferable upper limit is 100 nm.
- the primary particle size of the light shielding agent can be measured by using NICOMP 380ZLS (manufactured by PARTICS SIZING SYSTEMS) and dispersing the light shielding agent in a solvent (water, organic solvent, etc.).
- the minimum with preferable content of the said light-shielding agent in the sealing compound for liquid crystal display elements of this invention is 5 weight%, and a preferable upper limit is 80 weight%.
- the content of the light-shielding agent is within this range, the liquid crystal display element sealant can exhibit better light-shielding properties without reducing the adhesion to the substrate, the strength after curing, and the drawability. it can.
- the more preferable lower limit of the content of the light-shielding agent is 10% by weight, the more preferable upper limit is 70% by weight, the still more preferable lower limit is 30% by weight, and the still more preferable upper limit is 60% by weight.
- the sealing agent for liquid crystal display elements of the present invention is further added as necessary, stress relieving agent, reactive diluent, thixotropic agent, spacer, curing accelerator, antifoaming agent, leveling agent, polymerization inhibitor, etc.
- An agent or the like may be contained.
- a method for producing the sealing agent for liquid crystal display elements of the present invention for example, using a mixer such as a homodisper, a homomixer, a universal mixer, a planetary mixer, a kneader, a three roll, a curable resin, and a polymerization
- a mixer such as a homodisper, a homomixer, a universal mixer, a planetary mixer, a kneader, a three roll, a curable resin, and a polymerization
- examples thereof include a method of mixing an initiator and / or a thermosetting agent and an additive such as a silane coupling agent added as necessary.
- the sealing agent for liquid crystal display elements of the present invention has a preferable lower limit of 50,000 mPa ⁇ s and a preferable upper limit of 700,000 mPa ⁇ s measured using an E-type viscometer at 25 ° C. and 1 rpm. When the viscosity is within this range, the obtained sealing agent for liquid crystal display elements has excellent coating properties.
- a more preferable lower limit of the viscosity is 100,000 mPa ⁇ s, and a more preferable upper limit is 500,000 mPa ⁇ s.
- As the E-type viscometer for example, 5XHBDV-III + CP (manufactured by Brookfield, rotor No. CP-51) can be used.
- a vertical conducting material can be produced by blending conductive fine particles with the liquid crystal display element sealant of the present invention.
- Such a vertical conduction material containing the sealing agent for liquid crystal display elements of the present invention and conductive fine particles is also one aspect of the present invention.
- the conductive fine particles a metal ball, a resin fine particle formed with a conductive metal layer on the surface, or the like can be used.
- the one in which the conductive metal layer is formed on the surface of the resin fine particles is preferable because the conductive connection is possible without damaging the transparent substrate due to the excellent elasticity of the resin fine particles.
- the liquid crystal display element using the sealing agent for liquid crystal display elements of this invention or the vertical conduction material of this invention is also one of this invention.
- a liquid crystal dropping method is preferably used.
- the liquid crystal display element sealant of the present invention is applied to one of two substrates such as a glass substrate with electrodes such as an ITO thin film or a polyethylene terephthalate substrate by screen printing, dispenser application, or the like.
- the sealing agent for liquid crystal display elements which can be excellent in applicability
- the vertical conduction material and liquid crystal display element which use this sealing compound for liquid crystal display elements can be provided.
- Examples 1 to 7 and Comparative Examples 1 to 4 According to the mixing ratio described in Table 1, each material was mixed using a planetary stirrer (manufactured by Shinky Co., Ltd., “Awatori Nertaro”), and then further mixed using three rolls. To 7 and Comparative Examples 1 to 4 were prepared.
- the adhesive strength was measured using the tension gauge.
- the resulting value obtained by dividing measured values (kgf) in the seal coating cross sectional area (cm 2) is a case was 35 kgf / cm 2 or more " ⁇ " was 30 kgf / cm 2 or more 35 kgf / cm less than 2 where " ⁇ ", the case was 25 kgf / cm 2 or more 30 kgf / cm less than 2 " ⁇ ", and evaluated the adhesiveness of the case was less than 25 kgf / cm 2 as " ⁇ ".
- the moisture permeation preventive property was evaluated by setting “ ⁇ ” when it was 2 ⁇ 24 hr or more and less than 120 g / m 2 ⁇ 24 hr, and “x” when it was 120 g / m 2 ⁇ 24 hr or more.
- TN liquid crystal manufactured by Chisso Corporation, “JC-5001LA”
- JC-5001LA fine droplets of TN liquid crystal
- the other transparent electrode substrate is 5 Pa with a vacuum bonding device. Bonding was performed under vacuum to obtain a cell.
- the obtained cell was irradiated with 100 mW / cm 2 of ultraviolet rays for 30 seconds using a metal halide lamp, and then heated at 120 ° C. for 1 hour to cure the sealant to obtain a liquid crystal display element.
- the display unevenness generated in the liquid crystal (especially the corner portion) around the seal portion was visually observed, and when the display unevenness was not confirmed, “ ⁇ ”, slight display unevenness was confirmed.
- the display performance (low liquid crystal contamination) of the liquid crystal display element was evaluated with “ ⁇ ” as the case, “ ⁇ ” when the display unevenness was clearly confirmed, and “X” when the severe display unevenness was confirmed. Note that the liquid crystal display elements evaluated as “ ⁇ ” and “ ⁇ ” are at a level that causes no problem in practical use.
- the sealing agent for liquid crystal display elements which can be excellent in applicability
- the vertical conduction material and liquid crystal display element which use this sealing compound for liquid crystal display elements can be provided.
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Abstract
Description
しかしながら、狭額縁設計ではシール剤がブラックマトリックスの直下に配置されるため、滴下工法を行うと、シール剤を光硬化させる際に照射した光が遮られ、シール剤の内部まで光が到達せず硬化が不充分となるという問題があった。このようにシール剤の硬化が不充分となると、未硬化のシール剤成分が液晶中に溶出し、溶出したシール剤成分による硬化反応が液晶中において進行することで液晶汚染が発生するという問題があった。
以下に本発明を詳述する。
そこで本発明者らは、ビスフェノールS型構造を有する特定の化合物を特定量配合することにより、塗布性、透湿防止性、及び、接着性に優れ、かつ、液晶汚染を抑制できる液晶表示素子用シール剤を得ることができることを見出し、本発明を完成させるに至った。
上記硬化性樹脂は、上記式(1)で表される化合物を含有する。上記式(1)で表される化合物を含有することにより、本発明の液晶表示素子用シール剤は、接着性及び液晶汚染を抑制する効果に優れるものとなる。
なお、上記式(1)及び後述する式(2)におけるm及びnの値は、平均値である。また、mやnが0である場合とは、mやnが付されたエチレンオキサイド構造部分が結合手となることを意味する。
なお、本明細書において上記「(メタ)アクリル」とは、アクリル又はメタクリルを意味する。
上記その他の硬化性樹脂としては、例えば、上記式(1)で表される化合物以外の、(メタ)アクリル化合物やエポキシ化合物等が挙げられる。なかでも、上記(メタ)アクリル化合物として後述するエポキシ(メタ)アクリレートを含有することが好ましく、レゾルシノール型エポキシ(メタ)アクリレートを含有することがより好ましい。
なお、本明細書において上記「(メタ)アクリレート」とは、アクリレート又はメタクリレートを意味し、「エポキシ(メタ)アクリレート」とは、エポキシ化合物中の全てのエポキシ基を(メタ)アクリル酸と反応させた化合物のことを表す。
上記ビスフェノールF型エポキシ樹脂のうち市販されているものとしては、例えば、jER806、jER4004(いずれも三菱化学社製)等が挙げられる。
上記ビスフェノールE型エポキシ樹脂のうち市販されているものとしては、例えば、R710(プリンテック社製)等が挙げられる。
上記ビスフェノールS型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンEXA1514(DIC社製)等が挙げられる。
上記2,2’-ジアリルビスフェノールA型エポキシ樹脂のうち市販されているものとしては、例えば、RE-810NM(日本化薬社製)等が挙げられる。
上記水添ビスフェノール型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンEXA7015(DIC社製)等が挙げられる。
上記プロピレンオキシド付加ビスフェノールA型エポキシ樹脂のうち市販されているものとしては、例えば、EP-4000S(ADEKA社製)等が挙げられる。
上記レゾルシノール型エポキシ樹脂のうち市販されているものとしては、例えば、EX-201(ナガセケムテックス社製)等が挙げられる。
上記ビフェニル型エポキシ樹脂のうち市販されているものとしては、例えば、jER YX-4000H(三菱化学社製)等が挙げられる。
上記スルフィド型エポキシ樹脂のうち市販されているものとしては、例えば、YSLV-50TE(新日鉄住金化学社製)等が挙げられる。
上記ジフェニルエーテル型エポキシ樹脂のうち市販されているものとしては、例えば、YSLV-80DE(新日鉄住金化学社製)等が挙げられる。
上記ジシクロペンタジエン型エポキシ樹脂のうち市販されているものとしては、例えば、EP-4088S(ADEKA社製)等が挙げられる。
上記ナフタレン型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンHP4032、エピクロンEXA-4700(いずれもDIC社製)等が挙げられる。
上記フェノールノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンN-770(DIC社製)等が挙げられる。
上記オルトクレゾールノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンN-670-EXP-S(DIC社製)等が挙げられる。
上記ジシクロペンタジエンノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、エピクロンHP7200(DIC社製)等が挙げられる。
上記ビフェニルノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、NC-3000P(日本化薬社製)等が挙げられる。
上記ナフタレンフェノールノボラック型エポキシ樹脂のうち市販されているものとしては、例えば、ESN-165S(新日鉄住金化学社製)等が挙げられる。
上記グリシジルアミン型エポキシ樹脂のうち市販されているものとしては、例えば、jER630(三菱化学社製)、エピクロン430(DIC社製)、TETRAD-X(三菱ガス化学社製)等が挙げられる。
上記アルキルポリオール型エポキシ樹脂のうち市販されているものとしては、例えば、ZX-1542(新日鉄住金化学社製)、エピクロン726(DIC社製)、エポライト80MFA(共栄社化学社製)、デナコールEX-611(ナガセケムテックス社製)等が挙げられる。
上記ゴム変性型エポキシ樹脂のうち市販されているものとしては、例えば、YR-450、YR-207(いずれも新日鉄住金化学社製)、エポリードPB(ダイセル社製)等が挙げられる。
上記グリシジルエステル化合物のうち市販されているものとしては、例えば、デナコールEX-147(ナガセケムテックス社製)等が挙げられる。
上記エポキシ化合物のうちその他に市販されているものとしては、例えば、YDC-1312、YSLV-80XY、YSLV-90CR(いずれも新日鉄住金化学社製)、XAC4151(旭化成社製)、jER1031、jER1032(いずれも三菱化学社製)、EXA-7120(DIC社製)、TEPIC(日産化学社製)等が挙げられる。
なお、本明細書において上記部分(メタ)アクリル変性エポキシ樹脂とは、1分子中にエポキシ基と(メタ)アクリロイル基とをそれぞれ1つ以上有する化合物を意味し、例えば、2つ以上のエポキシ化合物の一部分のエポキシ基を(メタ)アクリル酸と反応させることによって得ることができる。
なお、本明細書において高分子アゾ化合物とは、アゾ基を有し、熱によって(メタ)アクリロイル基を硬化させることができるラジカルを生成する、数平均分子量が300以上の化合物を意味する。
なお、本明細書において、上記数平均分子量は、ゲルパーミエーションクロマトグラフィー(GPC)で測定を行い、ポリスチレン換算により求められる値である。GPCによってポリスチレン換算による数平均分子量を測定する際のカラムとしては、例えば、Shodex LF-804(昭和電工社製)等が挙げられる。
上記アゾ基を介してポリアルキレンオキサイド等のユニットが複数結合した構造を有する高分子アゾ開始剤としては、ポリエチレンオキサイド構造を有するものが好ましい。このような高分子アゾ開始剤としては、例えば、4,4’-アゾビス(4-シアノペンタン酸)とポリアルキレングリコールの重縮合物や、4,4’-アゾビス(4-シアノペンタン酸)と末端アミノ基を有するポリジメチルシロキサンの重縮合物等が挙げられ、具体的には例えば、VPE-0201、VPE-0401、VPE-0601、VPS-0501、VPS-1001(いずれも和光純薬工業社製)等が挙げられる。
また、高分子ではないアゾ化合物の例としては、V-65、V-501(いずれも和光純薬工業社製)等が挙げられる。
上記有機酸ヒドラジドのうち市販されているものとしては、例えば、SDH、ADH(いずれも大塚化学社製)、アミキュアVDH、アミキュアVDH-J、アミキュアUDH、アミキュアUDH-J(いずれも味の素ファインテクノ社製)等が挙げられる。
また、遮光剤として上記チタンブラックを含有する本発明の液晶表示素子用シール剤を用いて製造した液晶表示素子は、充分な遮光性を有するため、光の漏れ出しがなく高いコントラストを有し、優れた画像表示品質を有する液晶表示素子を実現することができる。
また、上記チタンブラックの体積抵抗の好ましい下限は0.5Ω・cm、好ましい上限は3Ω・cmであり、より好ましい下限は1Ω・cm、より好ましい上限は2.5Ω・cmである。
なお、上記遮光剤の一次粒子径は、NICOMP 380ZLS(PARTICLE SIZING SYSTEMS社製)を用いて、上記遮光剤を溶媒(水、有機溶媒等)に分散させて測定することができる。
なお、上記E型粘度計としては、例えば、5XHBDV-III+CP(ブルックフィールド社製、ローターNo.CP-51)等を用いることができる。
ビスフェノールSジグリシジルエーテル1000重量部、重合禁止剤としてp-メトキシフェノール2重量部、反応触媒としてトリエチルアミン2重量部、及び、アクリル酸200重量部を、空気を送り込みながら90℃で5時間還流撹拌して反応させた。得られた樹脂100重量部を、反応物中のイオン性不純物を吸着させる為にクオルツとカオリンの天然結合物(ホフマンミネラル社製、「シリチンV85」)10重量部が充填されたカラムで濾過し、式(1)で表される化合物(R1がH、m=n=0)を得た。なお、得られた化合物が式(1)で表される化合物(R1がH、m=n=0)であることは、1H-NMR、13C-NMR、及び、IRにより確認した。
温度計、滴下ロート、冷却管、及び、撹拌器を取り付けたフラスコに4,4’-ビス(2-ヒドロキシエチルオキシ)ジフェニルスルホン169重量部、エピクロルヒドリン370重量部、ジメチルスルホキシド185重量部、及び、テトラメチルアンモニウムクロライド5重量部を加えて撹拌下で溶解し、50℃まで昇温した。次いで、フレーク状の水酸化ナトリウム60重量部を100分かけて分割添加した後、更に50℃で3時間、後反応を行った。反応終了後、水400重量部を加えて水洗を行い、ロータリーエバポレーターを用いて、130℃、減圧下にて、油層から過剰のエピクロルヒドリン等を留去した。残留物にメチルイソブチルケトン450重量部を加えて溶解し、70℃まで昇温した。撹拌下で30%の水酸化ナトリウム水溶液10重量部を加え、1時間反応を行った後、水洗を3回行い、ロータリーエバポレーターを用いて、180℃、減圧下にて、メチルイソブチルケトンを留去した。得られた反応物1100重量部、重合禁止剤としてp-メトキシフェノール2重量部、反応触媒としてトリエチルアミン2重量部、及び、アクリル酸200重量部を、空気を送り込みながら90℃で5時間還流撹拌して反応させた。得られた樹脂100重量部を、反応物中のイオン性不純物を吸着させる為にクオルツとカオリンの天然結合物(ホフマンミネラル社製、「シリチンV85」)10重量部が充填されたカラムで濾過し、式(1)で表される化合物(R1がH、m=n=1(平均値))を得た。なお、得られた化合物が式(1)で表される化合物(R1がH、m=n=1(平均値))であることは、1H-NMR、13C-NMR、及び、IRにより確認した。
表1に記載された配合比に従い、各材料を遊星式撹拌機(シンキー社製、「あわとり練太郎」)を用いて混合した後、更に3本ロールを用いて混合することにより実施例1~7、及び、比較例1~4の液晶表示素子用シール剤を調製した。
実施例及び比較例で得られた液晶表示素子用シール剤について以下の評価を行った。結果を表1に示した。
ディスペンサー(武蔵エンジニアリング社製、「SHOTMASTER300」)を用いて、実施例及び比較例で得られた各液晶表示素子用シール剤をガラス基板上に塗布した。ディスペンスノズルを400μm、ノズルギャップを30μm、塗出圧を300kPaに固定して塗布したとき、かすれやダレがなく塗布できた場合を「◎」、わずかにかすれやダレが生じた場合を「○」、塗布切れはないが大きなかすれやダレが生じた場合を「△」、塗布切れが生じたり、全く塗布できなかったりした場合を「×」として塗布性を評価した。
実施例及び比較例で得られた各液晶表示素子用シール剤100重量部に対して平均粒子径5μmのスペーサー粒子(積水化学工業社製、「ミクロパールSP-2050」)1重量部を遊星式撹拌装置によって均一に分散させ、極微量をコーニングガラス1737(20mm×50mm×厚さ0.7mm)の中央部に取り、同型のガラスをその上に重ね合わせて液晶表示素子用シール剤を押し広げ、メタルハライドランプを用いて100mW/cm2の紫外線を30秒照射した後、120℃で1時間加熱してシール剤を硬化させ、接着試験片を得た。
得られた接着試験片について、テンションゲージを用いて接着強度を測定した。得られた測定値(kgf)をシール塗布断面積(cm2)で除した値が、35kgf/cm2以上であった場合を「◎」、30kgf/cm2以上35kgf/cm2未満であった場合を「○」、25kgf/cm2以上30kgf/cm2未満であった場合を「△」、25kgf/cm2未満であった場合を「×」として接着性を評価した。
実施例及び比較例で得られた各液晶表示素子用シール剤を、平滑な離型フィルム状にコーターで厚さ200~300μmに塗行した後、メタルハライドランプを用いて100mW/cm2の紫外線を30秒照射した後、120℃で1時間加熱することによって透湿度測定用硬化フィルムを得た。
JIS Z 0208の防湿包装材料の透湿度試験方法(カップ法)に準じた方法で透湿度試験用カップを作製し、得られた透湿度測定用硬化フィルムを取り付け、温度80℃湿度90%RHの恒温恒湿オーブンに投入して透湿度を測定した。得られた透湿度の値が60g/m2・24hr未満であった場合を「◎」、60g/m2・24hr以上100g/m2・24hr未満であった場合を「○」、100g/m2・24hr以上120g/m2・24hr未満であった場合を「△」、120g/m2・24hr以上であった場合を「×」として透湿防止性を評価した。
実施例及び比較例で得られた各液晶表示素子用シール剤100重量部に対して平均粒子径5μmのスペーサー粒子(積水化学工業社製、「ミクロパールSP-2050」)1重量部を遊星式撹拌装置によって均一に分散させ、得られたシール剤をディスペンス用のシリンジ(武蔵エンジニアリング社製、「PSY-10E」)に充填し、脱泡処理を行ってから、ディスペンサー(武蔵エンジニアリング社製、「SHOTMASTER300」)にて、2枚のITO薄膜付きの透明電極基板の一方にシール剤を枠状に塗布した。続いて、TN液晶(チッソ社製、「JC-5001LA」)の微小滴を液晶滴下装置にてシール剤の枠内に滴下塗布し、他方の透明電極基板を、真空貼り合わせ装置にて5Paの真空下にて貼り合わせ、セルを得た。得られたセルに、メタルハライドランプを用いて100mW/cm2の紫外線を30秒照射した後、120℃で1時間加熱してシール剤を硬化させ、液晶表示素子を得た。
得られた液晶表示素子について、シール部周辺の液晶(特にコーナー部)に生じる表示むらを目視にて観察し、表示むらが確認されなかった場合を「◎」、わずかな表示むらが確認された場合を「○」、はっきりと表示むらが確認された場合を「△」、酷い表示むらが確認された場合を「×」として液晶表示素子の表示性能(低液晶汚染性)を評価した。
なお、評価が「◎」、「○」の液晶表示素子は、実用に全く問題のないレベルである。
Claims (4)
- 硬化性樹脂は、更にエポキシ(メタ)アクリレートを含有することを特徴とする請求項1記載の液晶表示素子用シール剤。
- 請求項1又は2記載の液晶表示素子用シール剤と導電性微粒子とを含有することを特徴とする上下導通材料。
- 請求項1若しくは2記載の液晶表示素子用シール剤又は請求項3記載の上下導通材料を用いてなることを特徴とする液晶表示素子。
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WO2018159387A1 (ja) * | 2017-03-03 | 2018-09-07 | 日本ユピカ株式会社 | 電気電子部品用結晶性ラジカル重合性組成物、当該組成物を使用した電気電子部品成形体、及び当該電気電子部品成形体の製造方法 |
JP2018145280A (ja) * | 2017-03-03 | 2018-09-20 | 日本ユピカ株式会社 | 電気電子部品封止用結晶性ラジカル重合性組成物、当該組成物を使用した電気電子部品用封止体、及び当該封止体の製造方法 |
JP2019089871A (ja) * | 2017-11-10 | 2019-06-13 | 日本ユピカ株式会社 | 電気電子部品用結晶性ラジカル重合性組成物、当該組成物を使用した電気電子部品成形体、及び当該電気電子部品成形体の製造方法 |
EP4119590A1 (en) * | 2021-07-16 | 2023-01-18 | Hilti Aktiengesellschaft | Epoxide-acrylate hybrid molecules and their use for chemical anchoring |
EP4119589A1 (en) * | 2021-07-16 | 2023-01-18 | Hilti Aktiengesellschaft | Epoxy resin mixtures comprising epoxide-acrylate hybrid molecules and multicomponent reactive resin compositions therefrom |
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CN111656270B (zh) * | 2018-05-25 | 2024-06-21 | 积水化学工业株式会社 | 液晶显示元件用密封剂、上下导通材料以及液晶显示元件 |
CN113168055B (zh) * | 2018-12-07 | 2024-06-21 | 积水化学工业株式会社 | 显示元件用密封剂、固化物、上下导通材料及显示元件 |
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JP6523167B2 (ja) * | 2014-05-23 | 2019-05-29 | 積水化学工業株式会社 | 液晶滴下工法用シール剤、上下導通材料、及び、液晶表示素子 |
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JP2018145280A (ja) * | 2017-03-03 | 2018-09-20 | 日本ユピカ株式会社 | 電気電子部品封止用結晶性ラジカル重合性組成物、当該組成物を使用した電気電子部品用封止体、及び当該封止体の製造方法 |
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JP2019089871A (ja) * | 2017-11-10 | 2019-06-13 | 日本ユピカ株式会社 | 電気電子部品用結晶性ラジカル重合性組成物、当該組成物を使用した電気電子部品成形体、及び当該電気電子部品成形体の製造方法 |
EP4119590A1 (en) * | 2021-07-16 | 2023-01-18 | Hilti Aktiengesellschaft | Epoxide-acrylate hybrid molecules and their use for chemical anchoring |
EP4119589A1 (en) * | 2021-07-16 | 2023-01-18 | Hilti Aktiengesellschaft | Epoxy resin mixtures comprising epoxide-acrylate hybrid molecules and multicomponent reactive resin compositions therefrom |
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JPWO2017119406A1 (ja) | 2018-10-25 |
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KR102709510B1 (ko) | 2024-09-24 |
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