WO2020235357A1 - Sealing agent for liquid crystal dropping methods, liquid crystal display panel using same, and method for producing same - Google Patents
Sealing agent for liquid crystal dropping methods, liquid crystal display panel using same, and method for producing same Download PDFInfo
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- WO2020235357A1 WO2020235357A1 PCT/JP2020/018662 JP2020018662W WO2020235357A1 WO 2020235357 A1 WO2020235357 A1 WO 2020235357A1 JP 2020018662 W JP2020018662 W JP 2020018662W WO 2020235357 A1 WO2020235357 A1 WO 2020235357A1
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- liquid crystal
- epoxy resin
- display panel
- crystal display
- mass
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/68—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the catalysts used
-
- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5033—Amines aromatic
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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
Definitions
- the present invention relates to a sealing agent for a liquid crystal dropping method, a liquid crystal display panel using the sealant, and a method for manufacturing the same.
- a liquid crystal display panel usually has a pair of substrates, a frame-shaped sealing member arranged between them, and a pair of substrates and a liquid crystal filled in an area surrounded by a sealing agent.
- a liquid crystal dropping method has been widely used as a liquid crystal filling method.
- a sealing agent is applied to one of the pair of substrates to form a frame-shaped seal pattern.
- the liquid crystal is dropped into the seal pattern without curing the seal pattern.
- the pair of substrates are overlapped with the seal pattern sandwiched between them, and the seal pattern is irradiated with light or heated to cure the seal pattern (for example, Patent Document 1 and Patent Document 2).
- the cured product of the sealant hereinafter, also referred to as “seal member” not only prevents leakage of liquid crystal, but also has a function of bonding a pair of substrates.
- the uncured sealant comes into contact with the liquid crystal. Therefore, a part of the components contained in the sealing agent may be eluted into the liquid crystal and contaminate the liquid crystal. Further, if the adhesive strength between the substrate and the cured product (sealing member) of the sealing agent is low, peeling may occur between them, and liquid crystal leakage or the like may occur.
- the present invention is a sealing agent for the liquid crystal dropping method that can be used in the liquid crystal dropping method, and is difficult to elute into the liquid crystal when the liquid crystal display panel is manufactured, and when cured, the substrate of the liquid crystal display panel.
- a sealant having high adhesiveness with.
- the present invention provides the following encapsulants.
- the (A) epoxy resin contains a photopolymerization initiator and (D) a thermosetting agent, and has an epoxy equivalent of 350 or more. 100 parts by mass of the (A) epoxy resin and methylhexahydroanan anhydride.
- a cured product obtained by mixing a chemical equivalent of phthalic acid with respect to the epoxy resin (A) and 1 part by mass of dimethylbenzyldiamine, heating at 110 ° C. for 3 hours, and further heating at 165 ° C.
- a sealant for the liquid crystal dropping method wherein the wavelength at which the absorbance becomes 0.1 or more is 400 nm or more for the first time, and the content of the epoxy resin (A) is 5% by mass or more and less than 20% by mass.
- thermosetting agent is selected from the group consisting of dihydrazide-based thermosetting, imidazole-based thermosetting, amine adduct-based thermosetting, and polyamine-based thermosetting.
- the present invention provides the following method for manufacturing a liquid crystal display panel.
- a liquid crystal display having a pair of substrates, a frame-shaped seal member arranged between the pair of substrates, and a liquid crystal filled between the pair of substrates and inside the frame-shaped seal member.
- the sealing agent for the liquid crystal dropping method according to any one of [1] to [3] is applied on one of the pair of substrates to form a frame-shaped seal pattern.
- It includes a liquid crystal dropping step of dropping a liquid crystal on the region, a stacking step of superimposing the one substrate and the other substrate via the seal pattern, and a curing step of curing the seal pattern.
- Manufacturing method of liquid crystal display panel [5] The method for manufacturing a liquid crystal display panel according to [4], wherein the seal pattern is irradiated with light in the curing step. [6] The method for manufacturing a liquid crystal display panel according to [5], wherein in the curing step, heating is further performed after irradiation with light.
- the present invention provides the following liquid crystal display panels. [7] It has a pair of substrates, a frame-shaped sealing member arranged between the pair of substrates, and a liquid crystal filled between the pair of substrates and inside the frame-shaped sealing member.
- the sealing agent for the liquid crystal dropping method of the present invention when the liquid crystal display panel is manufactured by the liquid crystal dropping method, the liquid crystal is less likely to be contaminated, and the substrates can be firmly adhered to each other. Therefore, it is possible to manufacture a high-quality liquid crystal display panel.
- the sealing agent for liquid crystal dropping method of the present invention is used for producing a sealing member for a liquid crystal display panel.
- the sealing member is manufactured by the liquid crystal dropping method, the uncured sealant and the liquid crystal come into contact with each other as described above. Therefore, the components in the sealant may elute into the liquid crystal and contaminate the liquid crystal. Further, if the adhesive strength between the cured product (sealing member) of the sealing agent and the substrate is low, these are easily peeled off when the liquid crystal display panel is used, and liquid crystal leakage or the like is likely to occur.
- the sealing agent for the liquid crystal dropping method of the present invention (hereinafter, also simply referred to as “sealing agent”) has an epoxy equivalent of 350 or more and a glass transition temperature of the cured product of 100 ° C. or less (hereinafter, also referred to as “sealing agent”).
- A) Contains a certain amount of epoxy resin.
- epoxy resin has high compatibility with liquid crystal and is likely to cause liquid crystal contamination.
- compatibility with liquid crystal can be lowered, and a sealant can be used. It becomes difficult to dissolve in the liquid crystal.
- the cured product of the sealing agent is unlikely to contain a hydroxyl group, and when the substrate is hydrophobic, the adhesiveness tends to be particularly good. Further, when the glass transition temperature of the cured product of the epoxy resin (A) is 100 ° C. or lower, it is unlikely to become excessively hard, and the adhesive strength between the sealing member and the substrate of the liquid crystal display panel tends to be good.
- the encapsulant of the present invention contains (C) a photopolymerization initiator having high absorbance for light having a wavelength of 400 nm or more.
- the sealant is photocured, the longer the wavelength of light, the more likely it is to become scattered light. Therefore, when the (C) photopolymerization initiator has absorption at a wavelength of 400 nm or more, such scattered light can also be used to cure the encapsulant. And, for example, even when the sealing agent is arranged under the metal wiring or the like, it can be sufficiently cured. That is, when the absorbance of the (C) photopolymerization initiator with respect to long-wavelength light is high, photocuring can be sufficiently performed, and the components in the encapsulant are difficult to dissolve in the liquid crystal.
- the liquid crystal when a liquid crystal display panel is produced by the liquid crystal dropping method, the liquid crystal is less likely to be contaminated by (A) epoxy resin or (C) photopolymerization initiator, and the substrates are further strengthened. Can be adhered to.
- A epoxy resin
- C photopolymerization initiator
- the epoxy resin is a resin containing one or more epoxy groups in the molecule.
- the resin corresponding to the (B) curable resin described later that is, the resin having a (meth) acryloyl group in the molecule is not included in the (A) epoxy resin.
- the number of epoxy groups contained in the epoxy group is preferably 2 to 3, more preferably 2.
- the epoxy equivalent of the (A) epoxy resin tends to be 350 or more, and the glass transition temperature of the cured product tends to fall within a desired range.
- the epoxy equivalent of the epoxy resin (A) may be 350 or more, but is preferably 350 to 1000, more preferably 350 to 500.
- the epoxy equivalent is the mass of the epoxy resin per equivalent of the epoxy group, and is calculated by (average molecular weight of the resin) / (number of epoxy groups in one molecule). The epoxy equivalent can be measured in accordance with JIS K7236 (2009).
- the weight average molecular weight of the (A) epoxy resin is preferably 700 to 2000, more preferably 700 to 1000.
- the viscosity of the encapsulant tends to be in the desired range, and the encapsulant can be easily applied in a desired pattern.
- the glass transition temperature of the cured product is 100 ° C. or lower, more preferably 50 to 100 ° C., still more preferably 60 to 90 ° C.
- the adhesive strength between the sealing member and the substrate of the liquid crystal display panel tends to increase.
- the glass transition temperature is measured as follows.
- the structure of the epoxy resin (A) is not particularly limited as long as it satisfies the above-mentioned epoxy equivalent and the glass transition temperature of the cured product, but two or more epoxy groups or glycidyl groups are linked by a linking group.
- the structure is preferable.
- the linking group preferably has a chain structure (hereinafter, also referred to as “chain block”) such as an aliphatic hydrocarbon chain. Further, the linking group preferably further contains a structure containing an aromatic ring (hereinafter, also referred to as “aromatic block”), and it is particularly preferable that the chain block and the aromatic block are alternately bonded.
- the chain block may contain an aliphatic hydrocarbon chain having 2 or more carbon atoms, and may be linear or branched.
- chain blocks include alkylene and alkyleneoxy groups.
- the chain block has a structure in which a plurality of alkylene groups and alkyleneoxy groups are bonded via an ether bond, a thioether bond, an ester bond, an amide bond, a carbon-carbon double bond, a carbon-carbon triple bond, or the like. You may.
- the number of carbons contained in each chain block is preferably 3 or more, more preferably 4 or more, further preferably 5 to 30, and particularly preferably 6 to 20.
- the aromatic block may be composed of only an aromatic ring, and has a structure in which a plurality of aromatic rings are bonded via a methylene group, a dimethylmethylene group, an ether bond, a thioether bond, an ester bond, an amide bond, or the like.
- the aromatic block include a phenylene group, a naphthalene group, an anthracene group, a biphenyl group, a bisphenol A type structure, a bisphenol F type structure and the like.
- the epoxy resin (A) has any structure represented by the following general formula.
- k is an integer of 1 to 20, preferably 1 to 5.
- the epoxy resin (A) has any structure represented by the following general formula.
- h is an integer of 0 to 20, preferably 0 to 5.
- i and j represent integers of 1 to 20, preferably 1 to 5.
- i + j is preferably 2 to 10.
- the epoxy resin (A) may be a resin polymerized by a known method, or may be a commercially available product.
- the sealing agent may contain only one type of (A) epoxy resin, or may contain two or more types of epoxy resin.
- Examples of commercially available epoxy resins (A) include EXA-4850-150, EXA-4816, and EXA-4822 (all manufactured by DIC Corporation); EP-4003S, EP-4010S, EP-4010L, EP-4011S. (All manufactured by ADEKA Corporation); BEO-60E, BPO-20E (all manufactured by New Japan Chemical Co., Ltd.); YL7175-500, YL7175-1000, YL7410 (all manufactured by Mitsubishi Chemical Corporation) and the like are included.
- the amount of the epoxy resin (A) with respect to the total amount of the encapsulant is 5% by mass or more and less than 20% by mass, preferably 7.5 to 17.5% by mass, and more preferably 10 to 15% by mass.
- the amount of the epoxy resin (A) is 5% by mass or more, the adhesive strength between the cured product of the sealing agent and the substrate of the liquid crystal display panel becomes high.
- the amount of the (A) epoxy resin is less than 20% by mass, the amount of the (A) epoxy resin dissolved in the liquid crystal can be reduced.
- Curable Resin is a resin having at least one (meth) acryloyl group in the molecule and is cured by irradiation with light.
- the curable resin include a (meth) acrylic resin and a (meth) acrylic-modified epoxy resin having an epoxy group and a (meth) acrylic group in one molecule.
- the sealant may contain only one kind of these, or may contain two or more kinds of these.
- the (meth) acrylic resin is a resin containing a (meth) acryloyl group in the molecule and not containing an epoxy group.
- (meth) acryloyl represents meta-acryloyl, acryloyl, or both.
- the (meth) acrylic resin may be a monomer, an oligomer or a polymer.
- Examples of (meth) acrylic resins include diacrylates and / or dimethacrylates such as polyethylene glycol, propylene glycol, polypropylene glycol; diacrylates and / or dimethacrylates of tris (2-hydroxyethyl) isocyanurate; neopentyl glycol 1 Diacrylate and / or dimethacrylate of diol obtained by adding 4 mol or more of ethylene oxide or propylene oxide to a mole; diacrylate and / or dimethacrylate of a diol obtained by adding 2 mol of ethylene oxide or propylene oxide to 1 mol of bisphenol A / Or dimethacrylate; di or triacrylate and / or di or trimethacrylate of triol obtained by adding 3 mol or more of ethylene oxide or propylene oxide to 1 mol of trimethylolpropane; 4 mol or more of ethylene oxide to 1 mol of bisphenol A.
- diacrylates and / or dimethacrylates such as poly
- the weight average molecular weight of the (meth) acrylic resin is preferably 300 to 1000.
- the weight average molecular weight of the (meth) acrylic resin can be measured (in terms of polystyrene) by, for example, gel permeation chromatography (GPC).
- the (meth) acrylic-modified epoxy resin is a resin having a (meth) acryloyl group and an epoxy group in the molecule, and examples thereof include an epoxy resin and (meth) acrylic acid, for example, a basic catalyst. Includes resins obtained by reacting in the presence. Since the (meth) acrylic-modified epoxy resin has an epoxy group and a (meth) acryloyl group in the molecule, it has both photocurability and thermosetting property.
- the epoxy resin used as a raw material for the (meth) acrylic-modified epoxy resin may be a bifunctional or higher epoxy resin having two or more epoxy groups in the molecule, and may be bisphenol A type, bisphenol F type, or 2,2'-diallyl.
- Bisphenol type epoxy resins such as bisphenol A type, bisphenol AD type, and hydrogenated bisphenol type; novolak type epoxy resins such as phenol novolac type, cresol novolac type, biphenyl novolac type, and trisphenol novolac type; biphenyl type epoxy resin; naphthalene Includes type epoxy resin and the like.
- the (meth) acrylic-modified epoxy resin obtained by (meth) acrylic modification of a trifunctional or tetrafunctional polyfunctional epoxy resin has a high crosslink density and adheres the cured product (sealing member) of the sealant to the substrate. The strength tends to decrease. Therefore, a (meth) acrylic-modified epoxy resin obtained by modifying a bifunctional epoxy resin with (meth) acrylic is preferable.
- the bifunctional epoxy resin a biphenyl type epoxy resin, a naphthalene type epoxy resin, and a bisphenol type epoxy resin are preferable.
- the (meth) acrylic-modified epoxy resin is made from a bisphenol type epoxy resin such as bisphenol A type or bisphenol F type, the viscosity of the sealant tends to be in a desired range, and the sealant Is easier to apply.
- the epoxy resin used as a raw material may be one type or a combination of two or more types. Further, the epoxy resin used as a raw material is preferably highly purified by a molecular distillation method, a cleaning method or the like.
- the weight average molecular weight of the (meth) acrylic-modified epoxy resin is preferably 300 to 1000.
- the weight average molecular weight of the (meth) acrylic-modified epoxy resin can be measured (in terms of polystyrene) by, for example, gel permeation chromatography (GPC).
- the amount of the (B) curable resin in the sealant is preferably 30% by mass to 70% by mass, more preferably 50 to 65% by mass. (B) When the amount of the curable resin is within the above range, the photocurability of the sealant tends to be good.
- the photopolymerization initiator may be a compound capable of generating an active species by irradiation with light, may be a self-cleaving type photopolymerization initiator, or is a hydrogen abstraction type. It may be a photopolymerization initiator of.
- the encapsulant may contain only one type of (C) photopolymerization initiator, or may contain two or more types.
- the (C) photopolymerization initiator is measured on the long wavelength side in the ultraviolet-visible absorption spectrum measured by dissolving only the (C) photopolymerization initiator in tetrahydrofuran so as to have a concentration of 0.15% by mass.
- the wavelength at which the absorbance becomes 0.1 or more is 400 nm or more for the first time when confirmed from. That is, (C) the photopolymerization initiator has sufficient absorption in the region of the ultraviolet-visible absorption spectrum having a wavelength of 400 nm or more.
- the ultraviolet-visible absorption spectrum can be measured with an ultraviolet-visible spectrophotometer UV-2550 (manufactured by Shimadzu Corporation).
- C photopolymerization initiator examples include acylphosphine oxide compounds (eg 2,4,6-trimethylbenzoindiphenylphosphine oxide) and titanosen compounds (eg bis ( ⁇ 5-2,4-).
- acylphosphine oxide compounds eg 2,4,6-trimethylbenzoindiphenylphosphine oxide
- titanosen compounds eg bis ( ⁇ 5-2,4-).
- Cyclopentadiene-1-yl) -bis (2,6-difluoro-3- (1H-pyrrole-1-yl) -phenyl) titanium (Irgacure 784 (manufactured by BASF)
- oxime ester compounds for example) 1,2-octanedione-1- [4- (phenylthio) -2- (O-benzoyloxime)] (IRGACURE OXE01 manufactured by BASF), Etanone-1- [9-ethyl-6- (2-methylbenzoyl)) -9H-carbazole-3-yl] -1- (0-acetyloxime) (IRGACURE OXE02 manufactured by BASF, etc.) is included.
- Examples of hydrogen abstraction type (C) photopolymerization initiators include thioxathraquinone compounds (eg, thioxanthraquinone, 2-chlorothioxanthraquinone (manufactured by Tokyo Kasei Kogyo Co., Ltd.), 1-chloro-4-propoxythioxanthone, 1-chloro-4-.
- thioxathraquinone compounds eg, thioxanthraquinone, 2-chlorothioxanthraquinone (manufactured by Tokyo Kasei Kogyo Co., Ltd.)
- 1-chloro-4-propoxythioxanthone 1-chloro-4-.
- Ethoxythioxanthone (Lambson Limited Speedcure CPTX), 2-isopropylxantone (Lambson Limited Speedcure ITX), 4-isopropylthioxanthone, 2,4-dimethylthioxanthone, 2,4-diethylthioxanthone (Lambson Limited), Lambson Limited 2,4-Dichlorothioxanthone, Omnipol-TX (manufactured by IGM), anthraquinone compounds (eg 2-methylanthraquinone, 2-ethylanthraquinone, 2-t-butyl anthraquinone, 1-chloroanthraquinone, etc., 2-hydroxyanthraquinone (2-Hydroxyanthraquinone manufactured by Tokyo Kasei Kogyo Co., Ltd.), 2,6-dihydroxyanthraquinone (Anthraquinone manufactured by Tokyo Kasei Kogyo
- oxime ester compounds thioxanthone compounds, anthraquinone compounds, and titanocene compounds are preferable.
- the molecular weight of the photopolymerization initiator is preferably 200 or more and 5000 or less.
- the molecular weight of the photopolymerization initiator is more preferably 230 or more and 3000 or less, and further preferably 230 or more and 1500 or less.
- the content of the (C) photopolymerization initiator in the encapsulant is preferably 0.05 to 5% by mass, more preferably 0.1 to 2% by mass.
- the amount of the (C) photopolymerization initiator is in the above range, the above-mentioned (B) curable resin can be sufficiently photocured.
- thermosetting agent may be a compound that reacts with the epoxy group of the above-mentioned (A) epoxy resin or (B) curable resin and cures them, for example, by heating. It is preferably a compound that reacts with an epoxy group.
- the melting point of the (D) thermosetting agent is preferably 50 ° C. or higher and 250 ° C. or lower, and more preferably 50 ° C. or higher and 150 ° C. or lower. When the melting point of the (D) thermosetting agent is within the above range, the (D) thermosetting agent is difficult to react at room temperature, and the storage stability of the encapsulant is enhanced.
- thermosetting agent is at least one selected from the group consisting of dihydrazide-based thermosetting agents, imidazole-based thermosetting agents, amine adduct-based thermosetting agents, and polyamine-based thermosetting agents. It is preferably a thermosetting agent.
- the thermosetting agent may contain only one kind of these, or may contain two or more kinds of them.
- dihydrazide-based thermal latent curing agents examples include adipic acid dihydrazide (melting point 181 ° C.), 1,3-bis (hydrazinocarboethyl) -5-isopropylhydranthin (melting point 120 ° C.), 7,11-octadecadien. -1,18-dicarbohydrazide (melting point 160 ° C.), dodecane diic acid dihydrazide (melting point 190 ° C.), sebacic acid dihydrazide (melting point 189 ° C.) and the like are included.
- imidazole-based thermal latent curing agents examples include 2,4-diamino-6- [2'-ethylimidazolyl- (1')]-ethyltriazine (melting point 215 to 225 ° C.) and 2-phenylimidazole (melting point 137 to 137 to). 147 ° C.) and the like.
- the amine adduct-based thermal latent curing agent is a thermal latent curing agent composed of an additional compound obtained by reacting an amine-based compound having catalytic activity with an arbitrary compound, and an example thereof is Amicure PN-40 (Amicure PN-40).
- Amicure PN-23 melting point 100 ° C
- Amicure PN-31 melting point 115 ° C
- Amicure PN-H melting point 115 ° C
- Amicure MY-24 melting point 120 ° C
- Amicure MY-H Melting point 110 ° C
- Melting point 131 ° C. both manufactured by Ajinomoto Fine Techno Co., Ltd.
- the polyamine-based thermal latent curing agent is a thermal latent curing agent having a polymer structure obtained by reacting an amine with an epoxy, and examples thereof include ADEKA Hardener EH4339S (softening point 120 to 130 ° C.) and ADEKA Hardener. EH4357S (softening point 73 to 83 ° C.) (both manufactured by ADEKA Corporation) and the like are included.
- the amount of the (D) thermosetting agent in the encapsulant is preferably 15% by mass or less, more preferably 10% by mass or less. (D) When the amount of the thermosetting agent is in the above range, the encapsulant is sufficiently cured by heating.
- the encapsulant may contain inorganic particles, organic particles, other additives and the like as long as the object and effect of the present invention are not impaired.
- the sealant contains inorganic particles, the viscosity of the sealant tends to be in an appropriate range. It is also possible to adjust the strength of the cured product of the encapsulant and the linear expandability of the cured product with the inorganic particles. On the other hand, when the sealing agent contains organic particles, it is easy to adjust the elastic modulus of the cured product of the sealing agent.
- inorganic particles include calcium carbonate, magnesium carbonate, barium sulfate, magnesium sulfate, aluminum silicate, zirconium silicate, iron oxide, titanium oxide, aluminum oxide (alumina), zinc oxide, silicon dioxide (silica), potassium titanate, Includes kaolin, talc, glass beads, sericite-activated clay, bentonite, aluminum oxide, silicon dioxide and the like. Of these, silicon dioxide (silica) or talc is preferred.
- the sealing agent may contain only one kind of inorganic particles, or may contain two or more kinds of inorganic particles.
- the shape of the inorganic particles is not particularly limited, and may be a fixed shape such as a spherical shape, a plate shape, a needle shape, or a non-fixed shape.
- the average primary particle diameter of the inorganic particles is preferably 1.5 ⁇ m or less, and the specific surface area thereof is preferably 0.5 m 2 / g to 20 m 2 / g.
- the average primary particle diameter of the inorganic particles can be measured by the laser diffraction method described in JIS Z8825-1.
- the specific surface area can be measured by the BET method described in JIS Z8830.
- the content of the inorganic particles in the encapsulant is preferably 20% by mass or less, more preferably 15% by mass or less.
- the amount of the inorganic particles is in the above range, the viscosity of the encapsulant or the like tends to fall within the desired range.
- examples of organic particles include silicone particles, acrylic particles, styrene particles such as a styrene / divinylbenzene copolymer, and polyolefin particles.
- the encapsulant may contain only one type of organic particles, or may contain two or more types of organic particles.
- the average primary particle size of the organic particles is preferably 0.05 to 13 ⁇ m, more preferably 0.1 to 10 ⁇ m, and even more preferably 0.1 to 8 ⁇ m.
- the shape of the organic particles is not particularly limited, but is preferably spherical, and more preferably true spherical.
- the average primary particle size of organic particles can be measured by microscopy, specifically image analysis with an electron microscope.
- it is preferable that the surface of the organic particles is smooth. If the surface is smooth, the specific surface area decreases and the amount of organic particles that can be added to the encapsulant increases.
- the amount of organic particles in the encapsulant is preferably 15% by mass or less, more preferably 10% by mass or less.
- the elastic modulus of the encapsulant after curing tends to be in the desired range.
- the sealant may further contain a spacer or the like in order to adjust the gap of the liquid crystal display panel.
- the viscosity of the sealant E-type viscometer at 25 ° C. and 2.5 rpm is preferably 200 to 450 Pa ⁇ s, more preferably 300 to 400 Pa ⁇ s.
- the viscosity is in the above range, it is easy to apply the sealant in a pattern, and when the sealant (seal pattern) is sandwiched and the pair of substrates are overlapped, the sealant has a gap between them. It is easy to deform to fill. Therefore, the gap width between the pair of substrates of the liquid crystal display panel can be appropriately controlled.
- the thixotropy index (TI value) of the encapsulant of the present invention is preferably 1.0 to 1.5, more preferably 1.0 to 1.3, from the viewpoint of the applicability of the encapsulant.
- TI value the viscosity ⁇ 1 of the sealant at room temperature (25 ° C.) and 0.5 rpm was measured using an E-type viscometer, and the viscosity ⁇ 2 of the sealant at 5 rpm was measured, and these measured values were calculated by the following formula (1). ) Is the value obtained.
- TI value (viscosity ⁇ 1 (25 ° C) at 0.5 rpm) / (viscosity ⁇ 2 (25 ° C) at 5 rpm) ... (1)
- the method for producing the above-mentioned encapsulant is not particularly limited, and (A) epoxy resin, (B) curable resin, (C) photopolymerization initiator, and (D) thermosetting agent, if necessary, (E). ) It suffices if it can be mixed uniformly with other components. Mixing can be performed by, for example, three rolls or the like.
- the liquid crystal display panel of the present invention includes a pair of substrates, a frame-shaped seal member arranged between the substrates, and a liquid crystal filled between the pair of substrates and inside the frame-shaped seal member.
- the sealing member is a cured product of the above-mentioned sealing agent. As described above, the sealing member has good adhesive strength with the substrate and is difficult to elute into the liquid crystal.
- the pair of substrates are both transparent substrates.
- transparent substrate materials include glass or polycarbonate, polyethylene terephthalate, polyether sulfone, PMMA and the like.
- a matrix-like TFT, a color filter, a black matrix, etc. are arranged on the surface of the display board or the facing board.
- An alignment film is further formed on the surface of the display substrate or the facing substrate.
- the alignment film includes known organic alignment agents, inorganic alignment agents, and the like. Further, a known liquid crystal can be used as the liquid crystal.
- the liquid crystal display panel manufacturing method generally includes a liquid crystal dropping method and a liquid crystal injection method, but the liquid crystal display panel manufacturing method of the present invention is preferably the liquid crystal dropping method.
- the manufacturing method of the liquid crystal display panel by the liquid crystal dropping method is as follows: 1) a seal pattern forming step of applying the above-mentioned sealing agent to one substrate to form a frame-shaped seal pattern, and 2) the seal pattern is uncured. Liquid crystal that drops liquid crystal on one substrate and in the area surrounded by the seal pattern, or on the other substrate and in the area surrounded by the seal pattern when the other substrate and one substrate face each other. It includes a dropping step, a superposition step of 3) superimposing one substrate and the other substrate via a seal pattern, and 4) a curing step of curing the seal pattern.
- the above-mentioned sealing agent is applied to one of the substrates.
- the method of applying the sealant is not particularly limited as long as it is a method capable of forming a seal pattern with a desired thickness and width, such as screen printing or application with a dispenser. It is the same as the coating method.
- the shape of the seal pattern to be formed may be appropriately selected according to the application of the liquid crystal display panel and the like so that the liquid crystal does not leak.
- it may have a rectangular frame shape, but is not limited to the shape.
- the line width of the seal pattern is preferably 0.2 to 1.0 mm, more preferably 0.2 to 0.7 mm.
- the pair of substrates are opposed to each other with the seal pattern uncured.
- the state in which the seal pattern is uncured means a state in which the curing reaction of the sealant has not progressed to the gel point.
- the seal pattern may be semi-cured by irradiating or heating the seal pattern in order to suppress the dissolution of the sealing agent in the liquid crystal.
- the liquid crystal dropping method is the same as the known liquid crystal dropping method, and the liquid crystal may be dropped on the substrate on which the seal pattern is formed, and the liquid crystal may be dropped on the substrate on which the seal pattern is not formed (the other substrate). May be dropped.
- one substrate and the other substrate are laminated so as to face each other via a seal pattern. At this time, the gap between the substrates is controlled to be within a desired range.
- the seal pattern is cured.
- the method for curing the seal pattern is not particularly limited, but it is preferable that the seal pattern is temporarily cured by irradiation with light having a predetermined wavelength and then finally cured by heating. By light irradiation, the seal pattern can be instantly cured, and the components in the sealant can be suppressed from being dissolved in the liquid crystal.
- the wavelength of the light to be irradiated is appropriately selected according to the type of the photopolymerization initiator, and light having a wavelength of 350 to 600 nm is preferable.
- the light irradiation time is, for example, about 10 minutes, although it depends on the composition of the encapsulant.
- the amount of energy to be irradiated at this time may be an amount of energy that can cure (B) the curable resin or the like.
- the heating temperature is, for example, 100 to 150 ° C., although it depends on the composition of the encapsulant, and the heating time is preferably about 2 hours.
- C1 Photopolymerization Initiator-Photoinitiator
- C2 Omnipol-TX, manufactured by IGM, thioxanthone-based compound, specified by the following method, wavelength at which the absorbance is 0.1% or more: 437 nm.
- C3 Photopolymerization initiator (C3): The thioxanthone-based compound obtained in Synthesis Example 2 below, a wavelength having an absorbance of 0.1% or more specified by the following method: 439 nm.
- -Photopolymerization initiator (C4) Anthraquinone-based compound obtained in the following Synthesis Example 3, a wavelength having an absorbance of 0.1% or more specified by the following method: 483 nm.
- -Photopolymerization initiator (C5) Irgacure 784, manufactured by BASF, titanocene compound, wavelength specified by the following method, having an absorbance of 0.1% or more: 531 nm.
- Thermosetting agent-Thermosetting agent (D1) adipic acid dihydrazide, ADH, manufactured by Nihon Kasei Co., Ltd., melting point 177 to 184 ° C.
- Tg glass transition temperature
- DMA dynamic viscoelasticity measurement
- Each photopolymerization initiator was dissolved in tetrahydrofuran so as to have a concentration of 0.15% by mass. Then, the ultraviolet-visible absorption spectrum was specified by an ultraviolet-visible spectrophotometer UV-2550 (manufactured by Shimadzu Corporation). Then, in the absorption spectrum, when confirmed from the long wavelength side, the wavelength at which the absorbance was 0.1 or more for the first time was confirmed.
- Example 1 100 parts by mass of epoxy resin (A1), 600 parts by mass of curable resin (B1) obtained in Synthesis Example 1, 60 parts by mass of thermosetting agent (D1), 130 parts by mass of silica particles, 70 parts by mass of thermoplastic resin particles, 20 parts by mass of the silane coupling agent and 20 parts by mass of the photopolymerization initiator (C1) were sufficiently mixed using three rolls so as to form a uniform liquid to obtain a sealing agent for the liquid crystal dropping method. ..
- Examples 2 to 9 and Comparative Examples 1 to 7 A liquid crystal dropping method encapsulant was obtained in the same manner as in Example 1 except that each component was changed to the component shown in Table 1 below.
- ⁇ Adhesive strength test> A 40 mm ⁇ 45 mm glass substrate (RT-) in which a transparent electrode and an alignment film were previously formed using a dispenser (Shotmaster, manufactured by Musashi Engineering Co., Ltd.) using the sealant for the liquid crystal dropping method obtained in Examples and Comparative Examples.
- a 38 mm ⁇ 38 mm quadrangular seal pattern (cross-sectional area 2500 ⁇ m 2 ) was formed on the DM88-PIN (manufactured by EHC).
- the paired glass substrates were stacked under reduced pressure so as to be perpendicular to the glass substrate on which the above-mentioned seal pattern was formed, and then opened to the atmosphere for bonding. Then, the two laminated glass substrates are held in a light-shielding box for 1 minute, and then light including visible light (light having a wavelength of 350 to 450 nm) is irradiated so as to have an integrated irradiation amount of 3000 mJ / cm 2. The seal was cured by heating at 120 ° C. for 1 hour to obtain a test piece.
- Adhesive strength is 15 N / mm or more
- Adhesive strength is 7 N / mm or more and less than 15 N / mm
- Adhesive strength is less than 7 N / mm
- ⁇ Liquid crystal display panel display characteristic test> A 40 mm ⁇ 45 mm glass substrate (RT-DM88-PIN, EHC) in which a transparent electrode and an alignment film were previously formed using a dispenser (Shotmaster, manufactured by Musashi Engineering Co., Ltd.) for the obtained sealing material for the liquid crystal dropping method.
- a 35 mm ⁇ 35 mm quadrangular seal pattern (cross-sectional area 3500 ⁇ m 2 ) was formed on the main seal, and a 38 mm ⁇ 38 mm quadrangular seal pattern was formed on the outer periphery thereof.
- a liquid crystal material (MLC-6609-000, manufactured by Merck & Co., Inc.) corresponding to the capacity of the panel after bonding was precisely dropped into the frame of the main seal using a dispenser.
- the paired glass substrates were laminated under reduced pressure, opened to the atmosphere, and bonded.
- the main seal is masked with a substrate coated with a 36 mm ⁇ 36 mm square black matrix, and light containing visible light (wavelength 350).
- Light of up to 450 nm) was irradiated so as to have an integrated irradiation amount of 500 mJ / cm 2, and further heated at 120 ° C.
- ⁇ When the liquid crystal is oriented up to the main seal of the liquid crystal display panel and there is no color unevenness ⁇ : When color unevenness occurs in the vicinity of the main seal over a range of less than 1 mm ⁇ : 1 mm from the vicinity of the main seal When color unevenness occurs over the above range
- Examples 1 to 9 which include (C) a photopolymerization initiator having an absorbance of 0.1 or more even at a wavelength of 400 nm or more, and (D) a thermosetting agent, the adhesive strength is high. It was high and the result of the display characteristic test was also good.
- the liquid crystal when a liquid crystal display panel is manufactured by the liquid crystal dropping method, the liquid crystal is less likely to be contaminated, and the substrates can be firmly adhered to each other. Therefore, it is very useful for manufacturing a high quality liquid crystal display panel.
Abstract
Description
[1](A)エポキシ樹脂(ただし、分子内に(メタ)アクリロイル基を有する樹脂は除く)と、(B)分子内に(メタ)アクリロイル基を少なくとも1つ以上有する硬化性樹脂と、(C)光重合開始剤と、(D)熱硬化剤と、を含み、前記(A)エポキシ樹脂は、エポキシ当量が350以上であり、前記(A)エポキシ樹脂100質量部と、メチルヘキサヒドロ無水フタル酸を前記(A)エポキシ樹脂に対して化学当量と、ジメチルベンジルジアミン1質量部と、を混合し、110℃で3時間加熱し、さらに165℃で2時間加熱して得られる硬化物のガラス転移温度が100℃以下であり、前記(C)光重合開始剤のみを、濃度が0.15質量%となるようにテトラヒドロフランに溶解させて測定した紫外可視吸収スペクトルにおいて、長波長側から確認したときにはじめて吸光度が0.1以上となる波長が400nm以上であり、前記(A)エポキシ樹脂の含有量が、5質量%以上20質量%未満である、液晶滴下工法用封止剤。 The present invention provides the following encapsulants.
[1] (A) Epoxy resin (excluding resins having (meth) acryloyl groups in the molecule), (B) Curable resin having at least one (meth) acryloyl group in the molecule, and ( The (A) epoxy resin contains a photopolymerization initiator and (D) a thermosetting agent, and has an epoxy equivalent of 350 or more. 100 parts by mass of the (A) epoxy resin and methylhexahydroanan anhydride. A cured product obtained by mixing a chemical equivalent of phthalic acid with respect to the epoxy resin (A) and 1 part by mass of dimethylbenzyldiamine, heating at 110 ° C. for 3 hours, and further heating at 165 ° C. for 2 hours. Confirmed from the long wavelength side in the ultraviolet visible absorption spectrum measured by dissolving only the (C) photopolymerization initiator in tetrahydrofuran so that the glass transition temperature is 100 ° C. or lower and the concentration is 0.15% by mass. A sealant for the liquid crystal dropping method, wherein the wavelength at which the absorbance becomes 0.1 or more is 400 nm or more for the first time, and the content of the epoxy resin (A) is 5% by mass or more and less than 20% by mass.
[3]前記(D)熱硬化剤が、ジヒドラジド系熱潜在性硬化性、イミダゾール系熱潜在性硬化剤、アミンアダクト系熱潜在性硬化剤、およびポリアミン系熱潜在性硬化剤からなる群より選ばれる1つ以上の潜在性熱硬化剤である、[1]または[2]に記載の液晶滴下工法用封止剤。 [2] The compound according to [1], wherein the (C) photopolymerization initiator is one or more compounds selected from the group consisting of an oxime ester compound, a thioxanthone compound, an anthracene compound, and a titanosen compound. Encapsulant for liquid crystal dropping method.
[3] The (D) thermosetting agent is selected from the group consisting of dihydrazide-based thermosetting, imidazole-based thermosetting, amine adduct-based thermosetting, and polyamine-based thermosetting. The sealant for the liquid crystal dropping method according to [1] or [2], which is one or more latent thermosetting agents.
[4]一対の基板と、前記一対の基板の間に配置された枠状のシール部材と、前記一対の基板間かつ前記枠状のシール部材の内部に充填された液晶と、を有する液晶表示パネルの製造方法であって、一対の基板のうち、一方の基板上に、[1]~[3]のいずれかに記載の液晶滴下工法用封止剤を塗布し、枠状のシールパターンを形成するシールパターン形成工程と、前記一方の基板上かつ前記シールパターンに囲まれた領域、もしくは他方の基板上かつ前記他方の基板と前記一方の基板とを対向させたときに前記シールパターンに囲まれる領域に、液晶を滴下する液晶滴下工程と、前記一方の基板および前記他方の基板を、前記シールパターンを介して重ね合わせる重ね合わせ工程と、前記シールパターンを硬化させる硬化工程と、を含む、液晶表示パネルの製造方法。
[5]前記硬化工程において、前記シールパターンに光を照射する、[4]に記載の液晶表示パネルの製造方法。
[6]前記硬化工程において、光の照射後、加熱をさらに行う、[5]に記載の液晶表示パネルの製造方法。 The present invention provides the following method for manufacturing a liquid crystal display panel.
[4] A liquid crystal display having a pair of substrates, a frame-shaped seal member arranged between the pair of substrates, and a liquid crystal filled between the pair of substrates and inside the frame-shaped seal member. In the panel manufacturing method, the sealing agent for the liquid crystal dropping method according to any one of [1] to [3] is applied on one of the pair of substrates to form a frame-shaped seal pattern. When the seal pattern forming step to be formed and the region on the one substrate and surrounded by the seal pattern, or on the other substrate and the other substrate and the one substrate are opposed to each other, the seal pattern is surrounded. It includes a liquid crystal dropping step of dropping a liquid crystal on the region, a stacking step of superimposing the one substrate and the other substrate via the seal pattern, and a curing step of curing the seal pattern. Manufacturing method of liquid crystal display panel.
[5] The method for manufacturing a liquid crystal display panel according to [4], wherein the seal pattern is irradiated with light in the curing step.
[6] The method for manufacturing a liquid crystal display panel according to [5], wherein in the curing step, heating is further performed after irradiation with light.
[7]一対の基板と、前記一対の基板の間に配置された枠状のシール部材と、前記一対の基板間かつ前記枠状のシール部材の内部に充填された液晶と、を有し、前記シール部材が、[1]~[3]のいずれかに記載の液晶滴下工法用封止剤の硬化物である、液晶表示パネル。 The present invention provides the following liquid crystal display panels.
[7] It has a pair of substrates, a frame-shaped sealing member arranged between the pair of substrates, and a liquid crystal filled between the pair of substrates and inside the frame-shaped sealing member. A liquid crystal display panel in which the sealing member is a cured product of the sealing agent for the liquid crystal dropping method according to any one of [1] to [3].
本発明の液晶滴下工法用封止剤は、液晶表示パネルのシール部材を作製するために使用される。液晶滴下工法でシール部材を作製する場合、前述のように、未硬化の状態の封止剤と液晶とが接触する。そのため、封止剤中の成分が液晶内に溶出し、液晶を汚染することがあった。また、封止剤の硬化物(シール部材)と基板との接着強度が低いと、液晶表示パネルの使用時にこれらが剥離して、液晶漏れ等が生じやすかった。 1. 1. Sealing agent for liquid crystal dropping method The sealing agent for liquid crystal dropping method of the present invention is used for producing a sealing member for a liquid crystal display panel. When the sealing member is manufactured by the liquid crystal dropping method, the uncured sealant and the liquid crystal come into contact with each other as described above. Therefore, the components in the sealant may elute into the liquid crystal and contaminate the liquid crystal. Further, if the adhesive strength between the cured product (sealing member) of the sealing agent and the substrate is low, these are easily peeled off when the liquid crystal display panel is used, and liquid crystal leakage or the like is likely to occur.
エポキシ樹脂は、分子内にエポキシ基を1つ以上含む樹脂である。なお、本明細書において、後述の(B)硬化性樹脂に相当する樹脂、すなわち分子内に(メタ)アクリロイル基を有する樹脂は、(A)エポキシ樹脂に含まないものとする。 (A) Epoxy resin The epoxy resin is a resin containing one or more epoxy groups in the molecule. In the present specification, the resin corresponding to the (B) curable resin described later, that is, the resin having a (meth) acryloyl group in the molecule is not included in the (A) epoxy resin.
装置名:DMA7100(日立ハイテクサイエンス)
試料形状:幅10mm×厚み0.1mm×長さ20mm
温度範囲:25-200℃
昇温速度:5℃/min
測定間隔:3秒
測定周波数:10Hz
測定モード:引っ張り First, 100 parts by mass of (A) epoxy resin, chemical equivalent of methylhexahydrophthalic anhydride with respect to (A) epoxy resin, and 1 part by mass of dimethylbenzyldiamine are mixed. Then, the mixture is heated at 110 ° C. for 3 hours, and further heated at 165 ° C. for 2 hours. Then, the cured product is formed into a film of 100 μm, and the glass transition temperature under the following conditions is measured by dynamic viscoelasticity measurement (DMA). The numerical values in the present specification are values measured under the following devices and conditions.
Device name: DMA7100 (Hitachi High-Tech Science)
Sample shape: width 10 mm x thickness 0.1 mm x length 20 mm
Temperature range: 25-200 ° C
Heating rate: 5 ° C / min
Measurement interval: 3 seconds Measurement frequency: 10 Hz
Measurement mode: pull
(B)硬化性樹脂は、分子内に(メタ)アクリロイル基を少なくとも1つ以上有する樹脂であり、光の照射によって硬化する樹脂である。当該硬化性樹脂の例には、(メタ)アクリル樹脂や、1分子内にエポキシ基と(メタ)アクリル基とを有する(メタ)アクリル変性エポキシ樹脂が含まれる。封止剤は、これらを一種のみ含んでいてもよく、二種以上含んでいてもよい。 (B) Curable Resin (B) Curable Resin is a resin having at least one (meth) acryloyl group in the molecule and is cured by irradiation with light. Examples of the curable resin include a (meth) acrylic resin and a (meth) acrylic-modified epoxy resin having an epoxy group and a (meth) acrylic group in one molecule. The sealant may contain only one kind of these, or may contain two or more kinds of these.
(C)光重合開始剤は、光の照射によって、活性種を発生可能な化合物であればよく、自己開裂型の光重合開始剤であってもよく、水素引き抜き型の光重合開始剤であってもよい。封止剤は、(C)光重合開始剤を一種のみ含んでいてもよく、二種以上含んでいてもよい。 (C) Photopolymerization Initiator (C) The photopolymerization initiator may be a compound capable of generating an active species by irradiation with light, may be a self-cleaving type photopolymerization initiator, or is a hydrogen abstraction type. It may be a photopolymerization initiator of. The encapsulant may contain only one type of (C) photopolymerization initiator, or may contain two or more types.
(D)熱硬化剤は、上述の(A)エポキシ樹脂や、(B)硬化性樹脂のエポキシ基と反応し、これらを硬化させる化合物であればよく、例えば加熱によって、エポキシ基と反応する化合物であることが好ましい。 (D) Thermosetting agent (D) The thermosetting agent may be a compound that reacts with the epoxy group of the above-mentioned (A) epoxy resin or (B) curable resin and cures them, for example, by heating. It is preferably a compound that reacts with an epoxy group.
封止剤は、本発明の目的および効果を損なわない範囲において、無機粒子や有機粒子、その他の添加剤等を含んでいてもよい。 (E) Other components The encapsulant may contain inorganic particles, organic particles, other additives and the like as long as the object and effect of the present invention are not impaired.
封止剤のE型粘度計の25℃、2.5rpmにおける粘度は、200~450Pa・sが好ましく、300~400Pa・sがより好ましい。粘度が上記範囲にあると、封止剤をパターン状に塗布しやすく、さらには当該封止剤(シールパターン)を挟んで、一対の基板を重ね合わせたときに、封止剤がこれらの隙間を埋めるように変形しやすい。そのため、液晶表示パネルの一対の基板間のギャップ幅を適正に制御できる。 (F) Physical Properties and Manufacturing Method of Sealant The viscosity of the sealant E-type viscometer at 25 ° C. and 2.5 rpm is preferably 200 to 450 Pa · s, more preferably 300 to 400 Pa · s. When the viscosity is in the above range, it is easy to apply the sealant in a pattern, and when the sealant (seal pattern) is sandwiched and the pair of substrates are overlapped, the sealant has a gap between them. It is easy to deform to fill. Therefore, the gap width between the pair of substrates of the liquid crystal display panel can be appropriately controlled.
TI値=(0.5rpmにおける粘度η1(25℃))/(5rpmにおける粘度η2(25℃))・・・(1) The thixotropy index (TI value) of the encapsulant of the present invention is preferably 1.0 to 1.5, more preferably 1.0 to 1.3, from the viewpoint of the applicability of the encapsulant. For the TI value, the viscosity η1 of the sealant at room temperature (25 ° C.) and 0.5 rpm was measured using an E-type viscometer, and the viscosity η2 of the sealant at 5 rpm was measured, and these measured values were calculated by the following formula (1). ) Is the value obtained.
TI value = (viscosity η1 (25 ° C) at 0.5 rpm) / (viscosity η2 (25 ° C) at 5 rpm) ... (1)
本発明の液晶表示パネルは、一対の基板と、当該基板の間に配置された枠状のシール部材と、一対の基板間かつ枠状のシール部材の内部に充填された液晶と、を有する。当該液晶表示パネルでは、シール部材が、前述の封止剤の硬化物である。前述のように、シール部材は、基板との接着強度が良好であり、かつ液晶に溶出し難い。 2. 2. Liquid crystal display panel The liquid crystal display panel of the present invention includes a pair of substrates, a frame-shaped seal member arranged between the substrates, and a liquid crystal filled between the pair of substrates and inside the frame-shaped seal member. Has. In the liquid crystal display panel, the sealing member is a cured product of the above-mentioned sealing agent. As described above, the sealing member has good adhesive strength with the substrate and is difficult to elute into the liquid crystal.
実施例および比較例では、以下の材料を用いた。 [material]
In the examples and comparative examples, the following materials were used.
・エポキシ樹脂(A1):EPICLON EXA-4850-150、DIC社製、エポキシ当量:450、下記方法で測定される硬化物のガラス転移温度:70℃
・エポキシ樹脂(A2):EPICLON EXA-4816、DIC社製、エポキシ当量:403、下記方法で測定される硬化物のガラス転移温度:90℃
・エポキシ樹脂(A3):EP-4010S、ADEKA社製、エポキシ当量:350、下記方法で測定される硬化物のガラス転移温度:60℃
・エポキシ樹脂(A4):YL-980、三菱ケミカル社製、エポキシ当量:190、下記方法で測定される硬化物のガラス転移温度:150℃
・エポキシ樹脂(A5):YL-983U、三菱ケミカル社製、エポキシ当量:170、下記方法で測定される硬化物のガラス転移温度:140℃ (A) Epoxy resin-Epoxy resin (A1): EPICLON EXA-4850-150, manufactured by DIC, epoxy equivalent: 450, glass transition temperature of cured product measured by the following method: 70 ° C.
-Epoxy resin (A2): EPICLON EXA-4816, manufactured by DIC, epoxy equivalent: 403, glass transition temperature of cured product measured by the following method: 90 ° C.
Epoxy resin (A3): EP-4010S, manufactured by ADEKA, epoxy equivalent: 350, glass transition temperature of cured product measured by the following method: 60 ° C.
-Epoxy resin (A4): YL-980, manufactured by Mitsubishi Chemical Corporation, epoxy equivalent: 190, glass transition temperature of cured product measured by the following method: 150 ° C.
-Epoxy resin (A5): YL-983U, manufactured by Mitsubishi Chemical Corporation, epoxy equivalent: 170, glass transition temperature of cured product measured by the following method: 140 ° C.
・硬化性樹脂(B1)以下の合成例1で得られたメタクリル酸変性ビスフェノールF型エポキシ樹脂(50%部分メタクリル化物) (B) Curable resin-Curable resin (B1) Methacrylic acid-modified bisphenol F-type epoxy resin (50% partially methacrylic acid) obtained in Synthesis Example 1 below.
・光重合開始剤(C1):Irgacure OXE01、BASF社製、オキシムエステル系化合物、下記方法で特定される、吸光度が0.1%以上となる波長:410nm
・光重合開始剤(C2):Omnipol-TX、IGM社製、チオキサントン系化合物、下記方法で特定される、吸光度が0.1%以上となる波長:437nm
・光重合開始剤(C3):以下の合成例2で得られたチオキサントン系化合物、下記方法で特定される、吸光度が0.1%以上となる波長:439nm
・光重合開始剤(C4):以下の合成例3で得られたアントラキノン系化合物、下記方法で特定される、吸光度が0.1%以上となる波長:483nm
・光重合開始剤(C5):Irgacure 784、BASF社製、チタノセン系化合物、下記方法で特定される、吸光度が0.1%以上となる波長:531nm
・光重合開始剤(C6):Irgacure 651、BASF社製、ベンジルケタール系化合物、下記方法で特定される、吸光度が0.1%以上となる波長:377nm (C) Photopolymerization Initiator-Photoinitiator (C1): Irgacure OXE01, manufactured by BASF, an oxime ester compound, a wavelength having an absorbance of 0.1% or more specified by the following method: 410 nm.
-Photopolymerization initiator (C2): Omnipol-TX, manufactured by IGM, thioxanthone-based compound, specified by the following method, wavelength at which the absorbance is 0.1% or more: 437 nm.
-Photopolymerization initiator (C3): The thioxanthone-based compound obtained in Synthesis Example 2 below, a wavelength having an absorbance of 0.1% or more specified by the following method: 439 nm.
-Photopolymerization initiator (C4): Anthraquinone-based compound obtained in the following Synthesis Example 3, a wavelength having an absorbance of 0.1% or more specified by the following method: 483 nm.
-Photopolymerization initiator (C5): Irgacure 784, manufactured by BASF, titanocene compound, wavelength specified by the following method, having an absorbance of 0.1% or more: 531 nm.
-Photopolymerization initiator (C6): Irgacure 651, manufactured by BASF, benzyl ketal compound, specified by the following method, wavelength at which the absorbance is 0.1% or more: 377 nm.
・熱硬化剤(D1):アジピン酸ジヒドラジド、ADH、日本化成社製、融点177~184℃ (D) Thermosetting agent-Thermosetting agent (D1): adipic acid dihydrazide, ADH, manufactured by Nihon Kasei Co., Ltd., melting point 177 to 184 ° C.
・シリカ粒子:S-100、日本触媒化学社製
・熱可塑性樹脂粒子:微粒子ポリマーF351、アイカ工業社製
・シランカップリング剤:KBM-403、信越化学工業社製 (E) Others-Silica particles: S-100, manufactured by Nippon Catalytic Chemical Co., Ltd.-Thermoplastic resin particles: Fine particle polymer F351, manufactured by Aica Kogyo Co., Ltd.-Silane coupling agent: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.
液状ビスフェノールF型エポキシ樹脂(エポトートYDF-8170C、東都化成社製、エポキシ当量160g/eq)160gと、重合禁止剤(p-メトキシフェノール)0.1g、触媒(トリエタノールアミン)0.2gと、メタアクリル酸43.0gと、をフラスコ内に仕込み、乾燥空気を送り込んで90℃で還流攪拌しながら5時間反応させた。得られた化合物を、超純水にて20回洗浄し、メタアクリル酸変性ビスフェノールF型エポキシ樹脂(50%部分メタクリル化物)(硬化性樹脂(B1))を得た。 <Synthesis Example 1> (Synthesis of curable resin (B1))
Liquid bisphenol F type epoxy resin (Epototo YDF-8170C, manufactured by Toto Kasei Co., Ltd., epoxy equivalent 160 g / eq) 160 g, polymerization inhibitor (p-methoxyphenol) 0.1 g, catalyst (triethanolamine) 0.2 g, 43.0 g of methacrylic acid and 43.0 g of methacrylic acid were charged in a flask, and dry air was blown into the flask, and the mixture was reacted at 90 ° C. with reflux stirring for 5 hours. The obtained compound was washed with ultrapure water 20 times to obtain a methacrylic acid-modified bisphenol F type epoxy resin (50% partially methacrylic acid) (curable resin (B1)).
2-クロロチオキサントン5.6g(0.0225モル)と、2-メルカプトエタノールのカリウム塩2.6g(0.0225モル)とを、20mlのN,N-ジメチルアセトアミド中で、100℃で18時間攪拌した。次いで、得られた反応混合物を2N塩酸に添加し、酢酸エチルで抽出した。当該抽出物を後処理し、クロマトグラフィー精製した。これにより、2-(2-ヒドロキシエチルチオ)-チオキサンテン-9-オン3.5gを得た。 <Synthesis Example 2> (Synthesis of Photopolymerization Initiator (C3))
5.6 g (0.0225 mol) of 2-chlorothioxanthone and 2.6 g (0.0225 mol) of potassium salt of 2-mercaptoethanol were placed in 20 ml of N, N-dimethylacetamide at 100 ° C. for 18 hours. Stirred. The resulting reaction mixture was then added to 2N hydrochloric acid and extracted with ethyl acetate. The extract was post-treated and chromatographically purified. As a result, 3.5 g of 2- (2-hydroxyethylthio) -thioxanthene-9-one was obtained.
攪拌機、窒素ガス導入管、還流冷却管、および温度計を備えた4つ口フラスコ中へ、2-(2-ヒドロキシエチルチオ)-9,10-アントラキノン5.0g(1.76×10-2モル)とトルエン150gとを加えて、80℃で撹拌した後、ジブチル錫を触媒として1滴添加した。次いで、ヘキサメチレンジイソシアネートアロファネート変性体(三井化学社製、タケネートD-178NL、イソシアネート当量216.1g/eq)3.98gをトルエン10gに溶解させた溶液を30分かけて滴下した。その後、そのまま窒素雰囲気下80℃で2時間撹拌した。反応終了後、4つ口フラスコを氷浴で冷却し、析出した結晶成分を分離した。得られた結晶成分を再びトルエンと混合し、100℃で1時間撹拌した後、再度氷冷して不純成分を除去した。回収した結晶成分をオーブンで十分に乾燥させて、光重合開始剤(C3)を得た。 <Synthesis Example 3> (Synthesis of Photopolymerization Initiator (C4))
In a four-necked flask equipped with a stirrer, nitrogen gas introduction tube, reflux condenser, and thermometer, 5.0 g (1.76 × 10 -2 ) of 2- (2-hydroxyethylthio) -9,10-anthraquinone. (Mol) and 150 g of toluene were added, and the mixture was stirred at 80 ° C., and then 1 drop of dibutyltin was added as a catalyst. Next, a solution prepared by dissolving 3.98 g of a modified hexamethylene diisocyanate allophanate (Mitsui Chemicals, Inc., Takenate D-178NL, isocyanate equivalent 216.1 g / eq) in 10 g of toluene was added dropwise over 30 minutes. Then, the mixture was stirred as it was at 80 ° C. for 2 hours in a nitrogen atmosphere. After completion of the reaction, the four-necked flask was cooled in an ice bath to separate the precipitated crystal components. The obtained crystalline component was mixed with toluene again, stirred at 100 ° C. for 1 hour, and then ice-cooled again to remove the impure component. The recovered crystal components were sufficiently dried in an oven to obtain a photopolymerization initiator (C3).
エポキシ樹脂100質量部と、メチルヘキサヒドロ無水フタル酸をエポキシ樹脂に対して化学当量と、ジメチルベンジルジアミン1質量部と、を混合し、110℃で3時間加熱し、さらに165℃で2時間加熱した。そして、得られた硬化物を100μmのフィルム状に加工し、ガラス転移温度を動的粘弾性測定(DMA)により測定した。具体的には、以下の装置および条件で測定した。
装置名:DMA7100(日立ハイテクサイエンス)
試料形状:幅10mm×厚み0.1mm×長さ20mm
温度範囲:25-200℃
昇温速度:5℃/min
測定間隔:3秒
測定周波数:10Hz
測定モード:引っ張り <Measurement method of glass transition temperature (Tg) of epoxy resin>
100 parts by mass of epoxy resin, a chemical equivalent of methylhexahydrophthalic anhydride to the epoxy resin, and 1 part by mass of dimethylbenzyldiamine are mixed and heated at 110 ° C. for 3 hours, and further heated at 165 ° C. for 2 hours. did. Then, the obtained cured product was processed into a film of 100 μm, and the glass transition temperature was measured by dynamic viscoelasticity measurement (DMA). Specifically, the measurement was performed with the following devices and conditions.
Device name: DMA7100 (Hitachi High-Tech Science)
Sample shape: width 10 mm x thickness 0.1 mm x length 20 mm
Temperature range: 25-200 ° C
Heating rate: 5 ° C / min
Measurement interval: 3 seconds Measurement frequency: 10 Hz
Measurement mode: pull
各光重合開始剤をテトラヒドロフランに、濃度が0.15質量%となるように溶解させた。そして、紫外可視分光光度計UV-2550(島津製作所製)により紫外可視吸収スペクトルを特定した。そして、当該吸収スペクトルにおいて、長波長側から確認したときに、吸光度がはじめて0.1以上となる波長を確認した。 <Method for measuring absorbance of photopolymerization initiator>
Each photopolymerization initiator was dissolved in tetrahydrofuran so as to have a concentration of 0.15% by mass. Then, the ultraviolet-visible absorption spectrum was specified by an ultraviolet-visible spectrophotometer UV-2550 (manufactured by Shimadzu Corporation). Then, in the absorption spectrum, when confirmed from the long wavelength side, the wavelength at which the absorbance was 0.1 or more for the first time was confirmed.
エポキシ樹脂(A1)100質量部、合成例1で得られた硬化性樹脂(B1)600質量部、熱硬化剤(D1)60質量部、シリカ粒子130質量部、熱可塑性樹脂粒子70質量部、シランカップリング剤20質量部、および光重合開始剤(C1)20質量部を、三本ロールを用いて均一な液となるように十分に混合して、液晶滴下工法用封止剤を得た。 [Example 1]
100 parts by mass of epoxy resin (A1), 600 parts by mass of curable resin (B1) obtained in Synthesis Example 1, 60 parts by mass of thermosetting agent (D1), 130 parts by mass of silica particles, 70 parts by mass of thermoplastic resin particles, 20 parts by mass of the silane coupling agent and 20 parts by mass of the photopolymerization initiator (C1) were sufficiently mixed using three rolls so as to form a uniform liquid to obtain a sealing agent for the liquid crystal dropping method. ..
各成分を、下記表1に示す成分に変更した以外は、実施例1と同様に液晶滴下工法用封止剤を得た。 [Examples 2 to 9 and Comparative Examples 1 to 7]
A liquid crystal dropping method encapsulant was obtained in the same manner as in Example 1 except that each component was changed to the component shown in Table 1 below.
実施例1~9、および比較例1~7の液晶滴下工法用封止剤について、接着強度および表示特性を以下の方法で特定した。結果を表1に示す。 [Evaluation]
The adhesive strength and display characteristics of the liquid crystal dropping method sealants of Examples 1 to 9 and Comparative Examples 1 to 7 were specified by the following methods. The results are shown in Table 1.
実施例および比較例で得られた液晶滴下工法用封止剤を、ディスペンサー(ショットマスター、武蔵エンジニアリング社製)を用いて、透明電極と配向膜が予め形成された40mm×45mmガラス基板(RT-DM88-PIN、EHC社製)上に、38mm×38mmの四角形のシールパターン(断面積2500μm2)を形成した。 <Adhesive strength test>
A 40 mm × 45 mm glass substrate (RT-) in which a transparent electrode and an alignment film were previously formed using a dispenser (Shotmaster, manufactured by Musashi Engineering Co., Ltd.) using the sealant for the liquid crystal dropping method obtained in Examples and Comparative Examples. A 38 mm × 38 mm quadrangular seal pattern (cross-sectional area 2500 μm 2 ) was formed on the DM88-PIN (manufactured by EHC).
○:接着強度が15N/mm以上
△:接着強度が7N/mm以上15N/mm未満
×:接着強度が7N/mm未満 A portion 4.5 mm from the corner of the seal pattern of the obtained test piece was vertically pressed at a speed of 5 mm / min using a universal testing machine (Model210, manufactured by Intesco), and the stress when the seal was peeled off was measured. The adhesive strength was determined by dividing the stress by the seal line width drawn with the sealant. The evaluation was based on the following criteria.
◯: Adhesive strength is 15 N / mm or more Δ: Adhesive strength is 7 N / mm or more and less than 15 N / mm ×: Adhesive strength is less than 7 N / mm
得られた液晶滴下工法用封止材を、ディスペンサー(ショットマスター、武蔵エンジニアリング社製)を用いて、透明電極と配向膜が予め形成された40mm×45mmガラス基板(RT-DM88-PIN、EHC社製)上に、メインシールとして35mm×35mmの四角形のシールパターン(断面積3500μm2)と、その外周に38mm×38mmの四角形のシールパターンとを形成した。 <Liquid crystal display panel display characteristic test>
A 40 mm × 45 mm glass substrate (RT-DM88-PIN, EHC) in which a transparent electrode and an alignment film were previously formed using a dispenser (Shotmaster, manufactured by Musashi Engineering Co., Ltd.) for the obtained sealing material for the liquid crystal dropping method. A 35 mm × 35 mm quadrangular seal pattern (cross-sectional area 3500 μm 2 ) was formed on the main seal, and a 38 mm × 38 mm quadrangular seal pattern was formed on the outer periphery thereof.
○:液晶表示パネルのメインシール際まで液晶が配向されて色ムラが全くない場合
△:メインシール際の近傍に1mm未満の範囲にわたり色ムラが発生している場合
×:メインシール際近傍から1mm以上の範囲にわたり色ムラが発生している場合 Next, a liquid crystal material (MLC-6609-000, manufactured by Merck & Co., Inc.) corresponding to the capacity of the panel after bonding was precisely dropped into the frame of the main seal using a dispenser. Next, the paired glass substrates were laminated under reduced pressure, opened to the atmosphere, and bonded. Then, after holding the two bonded glass substrates in a light-shielding box for 1 minute, the main seal is masked with a substrate coated with a 36 mm × 36 mm square black matrix, and light containing visible light (wavelength 350). Light of up to 450 nm) was irradiated so as to have an integrated irradiation amount of 500 mJ / cm 2, and further heated at 120 ° C. for 1 hour to cure the main seal. Then, polarizing films were attached to both sides of the obtained liquid crystal cell to obtain a liquid crystal display panel. The evaluation was performed according to the following criteria.
◯: When the liquid crystal is oriented up to the main seal of the liquid crystal display panel and there is no color unevenness Δ: When color unevenness occurs in the vicinity of the main seal over a range of less than 1 mm ×: 1 mm from the vicinity of the main seal When color unevenness occurs over the above range
Claims (7)
- (A)エポキシ樹脂(ただし、分子内に(メタ)アクリロイル基を有する樹脂は除く)と、
(B)分子内に(メタ)アクリロイル基を少なくとも1つ以上有する硬化性樹脂と、
(C)光重合開始剤と、
(D)熱硬化剤と、
を含み、
前記(A)エポキシ樹脂は、エポキシ当量が350以上であり、
前記(A)エポキシ樹脂100質量部と、メチルヘキサヒドロ無水フタル酸を前記(A)エポキシ樹脂に対して化学当量と、ジメチルベンジルジアミン1質量部と、を混合し、110℃で3時間加熱し、さらに165℃で2時間加熱して得られる硬化物のガラス転移温度が100℃以下であり、
前記(C)光重合開始剤のみを、濃度が0.15質量%となるようにテトラヒドロフランに溶解させて測定した紫外可視吸収スペクトルにおいて、長波長側から確認したときにはじめて吸光度が0.1以上となる波長が400nm以上であり、
前記(A)エポキシ樹脂の含有量が、5質量%以上20質量%未満である、
液晶滴下工法用封止剤。 (A) Epoxy resin (excluding resins having a (meth) acryloyl group in the molecule),
(B) A curable resin having at least one (meth) acryloyl group in the molecule, and
(C) Photopolymerization initiator and
(D) Thermosetting agent and
Including
The epoxy resin (A) has an epoxy equivalent of 350 or more.
100 parts by mass of the (A) epoxy resin, a chemical equivalent of methylhexahydrophthalic anhydride to the (A) epoxy resin, and 1 part by mass of dimethylbenzyldiamine are mixed and heated at 110 ° C. for 3 hours. The glass transition temperature of the cured product obtained by further heating at 165 ° C. for 2 hours is 100 ° C. or lower.
In the ultraviolet-visible absorption spectrum measured by dissolving only the photopolymerization initiator (C) in tetrahydrofuran so as to have a concentration of 0.15% by mass, the absorbance is 0.1 or more only when confirmed from the long wavelength side. The wavelength is 400 nm or more,
The content of the epoxy resin (A) is 5% by mass or more and less than 20% by mass.
Sealant for liquid crystal dripping method. - 前記(C)光重合開始剤が、オキシムエステル系化合物、チオキサントン系化合物、アントラセン系化合物、およびチタノセン系化合物からなる群より選ばれる1つ以上の化合物である、
請求項1に記載の液晶滴下工法用封止剤。 The (C) photopolymerization initiator is one or more compounds selected from the group consisting of oxime ester compounds, thioxanthone compounds, anthracene compounds, and titanosen compounds.
The sealing agent for the liquid crystal dropping method according to claim 1. - 前記(D)熱硬化剤が、ジヒドラジド系熱潜在性硬化性、イミダゾール系熱潜在性硬化剤、アミンアダクト系熱潜在性硬化剤、およびポリアミン系熱潜在性硬化剤からなる群より選ばれる1つ以上の潜在性熱硬化剤である、
請求項1または2に記載の液晶滴下工法用封止剤。 The (D) thermosetting agent is one selected from the group consisting of dihydrazide-based thermosetting, imidazole-based thermosetting, amine adduct-based thermosetting, and polyamine-based thermosetting. The above latent thermosetting agent,
The sealing agent for the liquid crystal dropping method according to claim 1 or 2. - 一対の基板と、前記一対の基板の間に配置された枠状のシール部材と、前記一対の基板間かつ前記枠状のシール部材の内部に充填された液晶と、を有する液晶表示パネルの製造方法であって、
一対の基板のうち、一方の基板上に、請求項1~3のいずれか一項に記載の液晶滴下工法用封止剤を塗布し、枠状のシールパターンを形成するシールパターン形成工程と、
前記一方の基板上かつ前記シールパターンに囲まれた領域、もしくは他方の基板上かつ前記他方の基板と前記一方の基板とを対向させたときに前記シールパターンに囲まれる領域に、液晶を滴下する液晶滴下工程と、
前記一方の基板および前記他方の基板を、前記シールパターンを介して重ね合わせる重ね合わせ工程と、
前記シールパターンを硬化させる硬化工程と、
を含む、
液晶表示パネルの製造方法。 Manufacture of a liquid crystal display panel having a pair of substrates, a frame-shaped sealing member arranged between the pair of substrates, and a liquid crystal filled between the pair of substrates and inside the frame-shaped sealing member. It's a method
A seal pattern forming step of applying the sealing agent for the liquid crystal dropping method according to any one of claims 1 to 3 onto one of the pair of substrates to form a frame-shaped seal pattern.
The liquid crystal is dropped on the one substrate and the region surrounded by the seal pattern, or on the other substrate and on the region surrounded by the seal pattern when the other substrate and the one substrate are opposed to each other. Liquid crystal dropping process and
A stacking step of superimposing the one substrate and the other substrate via the seal pattern,
A curing step of curing the seal pattern and
including,
Manufacturing method of liquid crystal display panel. - 前記硬化工程において、前記シールパターンに光を照射する、
請求項4に記載の液晶表示パネルの製造方法。 In the curing step, the seal pattern is irradiated with light.
The method for manufacturing a liquid crystal display panel according to claim 4. - 前記硬化工程において、光の照射後、加熱をさらに行う、
請求項5に記載の液晶表示パネルの製造方法。 In the curing step, after irradiation with light, further heating is performed.
The method for manufacturing a liquid crystal display panel according to claim 5. - 一対の基板と、
前記一対の基板の間に配置された枠状のシール部材と、
前記一対の基板間かつ前記枠状のシール部材の内部に充填された液晶と、
を有し、
前記シール部材が、請求項1~3のいずれか一項に記載の液晶滴下工法用封止剤の硬化物である、
液晶表示パネル。 A pair of boards and
A frame-shaped sealing member arranged between the pair of substrates,
A liquid crystal filled between the pair of substrates and inside the frame-shaped sealing member,
Have,
The sealing member is a cured product of the sealing agent for the liquid crystal dropping method according to any one of claims 1 to 3.
Liquid crystal display panel.
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WO2016067582A1 (en) * | 2014-10-30 | 2016-05-06 | 三井化学株式会社 | Method for producing liquid crystal display panel, liquid crystal display panel and liquid crystal sealing agent composition |
WO2016074184A1 (en) * | 2014-11-13 | 2016-05-19 | Ablestik (Shanghai) Ltd. | Thermally curable sealant composition and use thereof |
JP6097454B1 (en) | 2015-09-02 | 2017-03-15 | 積水化学工業株式会社 | Sealant for liquid crystal display element, vertical conduction material, and liquid crystal display element |
JP2017149794A (en) * | 2016-02-22 | 2017-08-31 | 三井化学株式会社 | Photocurable resin composition, display element sealant, liquid crystal sealant and liquid crystal display panel |
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2020
- 2020-05-08 JP JP2021520701A patent/JP7145329B2/en active Active
- 2020-05-08 KR KR1020217035720A patent/KR20210151125A/en not_active Application Discontinuation
- 2020-05-08 CN CN202080027407.7A patent/CN113661437A/en active Pending
- 2020-05-08 WO PCT/JP2020/018662 patent/WO2020235357A1/en active Application Filing
- 2020-05-13 TW TW109115798A patent/TW202106794A/en unknown
Patent Citations (3)
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JP2017110120A (en) * | 2015-12-17 | 2017-06-22 | 三井化学株式会社 | Photocurable resin composition, display element sealing agent and liquid crystal display panel and method for manufacturing the same |
JP2017219565A (en) * | 2016-06-02 | 2017-12-14 | 三井化学株式会社 | Sealant for liquid crystal dropping method, liquid crystal display panel, and method for manufacturing liquid crystal display panel |
JP2017223828A (en) * | 2016-06-15 | 2017-12-21 | 三井化学株式会社 | Sealant for liquid crystal dropping method, liquid crystal display panel, and method for manufacturing liquid crystal display panel |
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Publication number | Priority date | Publication date | Assignee | Title |
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WO2023032543A1 (en) * | 2021-09-03 | 2023-03-09 | 積水化学工業株式会社 | Liquid crystal display element sealant and liquid crystal display element |
WO2023182358A1 (en) * | 2022-03-25 | 2023-09-28 | 三井化学株式会社 | Thermosetting resin composition, sealant for display devices, and display device |
Also Published As
Publication number | Publication date |
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KR20210151125A (en) | 2021-12-13 |
JP7145329B2 (en) | 2022-09-30 |
JPWO2020235357A1 (en) | 2020-11-26 |
CN113661437A (en) | 2021-11-16 |
TW202106794A (en) | 2021-02-16 |
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