WO2004039885A1 - 液晶シール剤組成物及びそれを用いた液晶表示パネルの製造方法 - Google Patents
液晶シール剤組成物及びそれを用いた液晶表示パネルの製造方法 Download PDFInfo
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- WO2004039885A1 WO2004039885A1 PCT/JP2003/013619 JP0313619W WO2004039885A1 WO 2004039885 A1 WO2004039885 A1 WO 2004039885A1 JP 0313619 W JP0313619 W JP 0313619W WO 2004039885 A1 WO2004039885 A1 WO 2004039885A1
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- sealant composition
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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
-
- 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
- C08G59/20—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 epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/30—Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen and nitrogen
- C08G59/306—Di-epoxy compounds containing atoms other than carbon, hydrogen, oxygen and nitrogen containing silicon
-
- 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
- C08G59/20—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 epoxy compounds used
- C08G59/32—Epoxy compounds containing three or more epoxy groups
- C08G59/3254—Epoxy compounds containing three or more epoxy groups containing atoms other than carbon, hydrogen, oxygen or nitrogen
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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
- 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
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
-
- 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
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/05—Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
-
- 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
- C09K2323/00—Functional layers of liquid crystal optical display excluding electroactive liquid crystal layer characterised by chemical composition
- C09K2323/05—Bonding or intermediate layer characterised by chemical composition, e.g. sealant or spacer
- C09K2323/055—Epoxy
-
- 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
- G02F2202/00—Materials and properties
- G02F2202/02—Materials and properties organic material
- G02F2202/022—Materials and properties organic material polymeric
- G02F2202/023—Materials and properties organic material polymeric curable
- G02F2202/025—Materials and properties organic material polymeric curable thermocurable
Definitions
- Liquid crystal sealant composition and method for producing liquid crystal display panel using the same
- the present invention relates to a sealant composition for a liquid crystal display panel having excellent adhesiveness, moisture resistance, and heat resistance, a method for manufacturing a liquid crystal display panel using the same, and a liquid crystal display panel.
- liquid crystal display panels characterized by light weight and high definition have come into wide use as unlisted panels for various devices including mobile phones.
- the usage environment is becoming increasingly severe with the diversification of applications of liquid crystal display panels.
- liquid crystal display cells are required to have high definition, uniformity and high quality.
- the liquid crystal sealant composition seals liquid crystal between a transparent glass substrate or a plastic substrate on which an important transparent electrode or alignment film is appropriately disposed as a component of a liquid crystal display panel, and does not leak to the outside. Is used for containment.
- a one-pack type epoxy resin-based thermosetting resin composition is widely used.
- the liquid crystal display panels are required to be improved in shock resistance, high temperature, and high humidity resistance, because they are used outdoors or in passenger cars.
- the liquid crystal sealant composition is strongly required to have improved adhesiveness and heat resistance.
- a rubber-like component such as CTBN, ATBN, ether elastomer, or a large amount of an epoxy resin component modified with such a rubber-like component is added. It is common to improve stress relaxation and adhesion.
- the T g of the cured product decreases, and the heat resistance becomes insufficient.
- a large amount of filler such as glass fiber, glass particles, and amorphous silica is mixed. There is a way to do it.
- the heat resistance is improved, the cured product tends to become brittle and the adhesiveness tends to decrease.
- the method of heating and press-bonding a large number of sheets at a time is considered to be good, and is widely practiced.
- a liquid crystal cell composition substrate coated with a liquid crystal sealant composition on one substrate is vacuum-pressed in a state where many sets of two substrates are stacked, and the heating bonding process is performed in a heating furnace. It is a system that is produced through
- a single-wafer press heat bonding method that is, a method in which two sets of transparent substrates for liquid crystal cells are heated and pressed and bonded one by one has been newly proposed.
- Japanese Patent Application Laid-Open No. 10-273644 discloses that (a) a liquid epoxy resin, and (b) a soft dipping point by a ring and ball method is 75 °.
- a curing agent consisting of a nopolak resin of C or less, (c) a filler having a particle size of 1 or less, and (d) a curing accelerator as an essential component, and a mixture of the components (a) and (b) is liquid.
- a liquid crystal sealant composition characterized by having a softening point of 50 ° C. or less as measured by a ring and ball method has been proposed.
- the heat curing process using the single-wafer press-heating method causes a sharp decrease in viscosity, causing breakage of the seal shape and foaming phenomenon inside the seal. Etc. tended to be faint.
- the glass transition temperature of the cured product of the liquid crystal sealant composition was lowered, so that heat resistance tended to be inferior.
- Japanese Patent Application Laid-Open No. 2001-64483 proposes a sealant composition for a liquid crystal display panel containing an epoxy resin, a curing agent, an epoxidized polybutadiene, and an inorganic filler.
- an epoxidized polybutadiene component is essential.
- the seal shape retention property is excellent in this hot press bonding method, since the glass transition temperature of the epoxidized polybutadiene component is low, the cured product glass transition temperature of the liquid crystal sealant composition also decreases. The heat resistance tended to be poor.
- the present invention provides a novel liquid crystal sealant composition that can be applied to a single-wafer press heat bonding method, can exhibit high-speed productivity, and is excellent in cell adhesion, moisture permeability, and heat resistance. It is aimed at. Disclosure of the invention
- the present inventors have conducted intensive studies to solve the above problems, and as a result, have found that the following liquid crystal sealant composition can solve the above problems, and have completed the present invention.
- the liquid crystal sealant composition of the present invention is obtained by subjecting (1) (a) an epoxy resin having at least one hydroxyl group in one molecule and (b) an alkoxysilyl group-containing compound to a dealcoholization condensation reaction. (2) a latent epoxy curing agent, (3) a filler having an average particle diameter of 0.1 to: L 0 m, and, if necessary, (4) a modified epoxy resin containing an alkoxysilyl group.
- the method for manufacturing a liquid crystal display panel of the present invention is characterized in that, in a liquid crystal single-wafer press heat bonding method, thermosetting is performed using the liquid crystal sealing agent composition.
- a liquid crystal display panel of the present invention is characterized by being manufactured by the above-described method of manufacturing a liquid crystal display panel.
- liquid crystal sealant composition used in the present invention will be described in detail.
- the liquid crystal sealant composition according to the present invention specifically includes (1) (a) an epoxy resin having at least one hydroxyl group in one molecule and (b) an alkoxysilyl group-containing compound by de-alcoholization.
- An alkoxysilyl group-containing modified epoxy resin obtained by the condensation reaction (2) a latent epoxy curing agent, (3) a filler having an average particle size of 0.1 to 10, and if necessary, (4)
- An epoxy resin having an average of 1.2 or more epoxy groups in one molecule (5) an aprotic solvent which is compatible with the epoxy resin and which is inactive with respect to the epoxy group having a boiling point in the range of 140 to 220 ° C, (6) Consists of other additives.
- each of these components will be specifically described. .
- (1-1) modified epoxy resin containing alkoxysilyl group (a) Epoxy having at least one hydroxyl group in one molecule There is no particular limitation as long as it is at least one epoxy resin satisfying the above requirements. Examples include bisphenol-type epoxy resins, carboxylic acid-modified epoxy resins, glycidyl group- and hydroxyl group-containing radical copolymers, and the like.
- Bisphenol-type epoxy resin is represented by the following formula (1)
- bisphenol-type epoxy resins include bisphenol A-type epoxy resin, bisphenol F-type epoxy resin, and bisphenol AD-type epoxy resin.
- hydrogenated products of these bisphenol-type epoxy resins can also be suitably used.
- a lipoxyl-modified epoxy resin in which a secondary hydroxyl group is formed in the molecule by previously reacting a part of the epoxy group in the epoxy resin with a compound containing at least one carboxyl group in the molecule is also suitable.
- 0.01 to 0.6 equivalents of a carboxylic acid group in a compound having at least one carboxyl group in the molecule is reacted with one equivalent of the epoxy group in the epoxy resin in a basic catalyst.
- a carboxy-modified epoxy resin having a secondary hydroxyl group in the molecule can be obtained.
- Dalicidyl group-containing radical copolymerizable monomers such as glycidyl (meth) acrylate, and hydroxyl group-containing radical monomers such as hydroxylethyl (meth) acrylate, and copolymers with other copolymerizable monomers Radical copolymers having both a daricidyl group and a hydroxyl group in one molecule can also be suitably used.
- the (b) alkoxysilyl group-containing compound used in the present invention is represented by the following formula (2):
- R1 is an alkoxy group, a vinyl group, a (meth) acryloyl group, a carboxyl group, an epoxy group, a glycidyl group, an amino group, an alkyl group having 1 to 8 carbon atoms which may have a mercapto group, phenyl
- R 2 is an alkoxysilyl group having 1 to 8 carbon atoms, an alkyl group and / or a phenyl group
- R 3 is an alkyl group having 1 to 8 carbon atoms
- n is 0 to
- p represents an integer of 0 to 2.
- alkoxysilyl group-containing compound examples include tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetraisopropoxysilane, and tetrabutoxysilane; Methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, isopropyltrimethoxysilane, isopropyltriethoxy Shi Orchid, vinyltrimethoxysilane, vinyltriethoxysilane, 3-methacrylon, 3-methacryloxypropyltriethoxysilane, 3-acryloxy
- the method for producing the (1-2) alkoxysilyl group-containing modified epoxy resin is not particularly limited.
- JP-A-2001-59011 and JP-A-2002-24995 For example, the denaturation method described in JP-A-39-39, etc.
- the reaction is carried out by charging an alkoxysilyl group-containing compound and heating it to distill off the by-produced alcohol.
- the reaction temperature is 50 to 130 ° C, preferably 70 to 110 ° C, and the total reaction time is about 1 to 24 hours.
- This reaction is desirably carried out under substantially non-aqueous conditions in order to prevent (b) excessive progress of the polycondensation reaction of the alkoxy'syloxy group-containing compound itself.
- a conventionally known accelerator for accelerating the reaction.
- the accelerator include organometallic compounds such as dibutyltin dilaurate and zinc stearate.
- the above reaction can be carried out in a solvent or without a solvent.
- the solvent include: (a) an epoxy resin having at least one hydroxyl group in one molecule; and (b) a compound having good solubility in an alkoxylsilyl group-containing compound and being inactive against these compounds.
- Solvents are preferred.
- examples of such an organic solvent include, for example, Non-protic solvents such as ketone solvents such as methyl ethyl ketone and cyclohexanone, ester solvents such as ethyl acetate and butyl acetate, and aromatic solvents such as toluene and xylene.
- the proportion of the (b) alkoxysilyl group-containing compound to the epoxy resin having at least one hydroxyl group in one molecule is as follows: (b) 1 equivalent of the alkoxysilyl of the alkoxysilyl group-containing compound.
- the hydroxyl equivalent of the epoxy resin (a) is preferably in the range of 0.01 to 0.5. If the above equivalent ratio is less than 0.01, unreacted alkoxysilyl group-containing compounds increase, and if it exceeds 0.5, sufficient heat resistance cannot be obtained, which is not preferable.
- the thus obtained (1) alkoxysilyl group-containing silane-modified epoxy resin may contain an unreacted epoxy resin component or an unreacted alkoxysilyl group-containing compound.
- degenerative conditions of (b) alkoxysilyl Le group-containing compound alkoxysilyl group-containing modified epoxy resin to the epoxy resin having a hydroxyl group (a) are, for example, by X H-NMR (CDC 1 3 solution), the epoxy ring methine peak ( (Around 3.3 pm) and the disappearance of the hydroxyl group peak (around 3.85 ppm) in the epoxy resin.
- the alkoxysilyl group-containing modified epoxy resin is preferably used in an amount of 1 to 30% by weight of (1) per 100% by weight of the entire liquid crystal sealing agent.
- the content is within this range, the viscosity stability of the liquid crystal sealant composition is good, and since the Tg of the cured product is high, the heat resistance is excellent and the adhesiveness is high.
- latent epoxy curing agent (2) used in the present invention a known latent epoxy curing agent capable of imparting a curing reaction to an epoxy resin by heating can be selected and used.
- latent epoxy curing agents include: imidazoyl duct-type curing agents, dicyandiamide-modified curing agents, dicyandiamide, dihydrazide-based curing agents, imidazole-based curing agents, amine-adduct-type curing agents, and amine / acid anhydride adducts. Mold curing agents, polyhydric phenol compounds, acid anhydride-based hardeners and the like. (2) It is desirable that the latent epoxy curing agent contains at least one amine-based curing agent having a melting point or a softening point temperature of at least 100 ° C by a ring and ball method.
- the amine-based curing agent examples include an imidazole-based curing agent, a dicyandiamide-modified curing agent, a 1,8-diazabicyclo (5,4,0) pandecene-17 derivative, dicyandiamide, a hydrazide-based curing agent, and an amine-based curing agent. And imidazole derivatives.
- the latent epoxy curing agent it is more preferable to use at least one or more imidazole curing agents having a melting point of 130 ° C. or more. Specific examples of the imidazole hardening agent having a melting point of 130 ° C.
- 1-cyanoethyl-2-phenylimidazorim trimellitate (melting point: 17 ° C. to 18 ° C.) , 2-phenylimidazole isocyanuric acid adduct (melting point 135 ° C), 2,4-diaminol 6- [2'-methylimidazolyl (1 ')] ethyl-s-triazine (melting point 248 To 258 ° C.).
- the latent epoxy curing agent preferably contains 2 to 40% by weight in 10.0% by weight of the liquid crystal sealant composition of the present invention. Within this range, the liquid crystal sealant composition of the present invention is sufficiently cured, has a good cured product Tg and good adhesion, and has favorable viscosity stability at room temperature of the composition.
- the alkoxysilyl group-containing modified epoxy resin has, in its molecule, (b) an alkoxy group derived from the alkoxysilyl group-containing conjugate.
- the alkoxide group undergoes sol-gel curing of the (b) alkoxysilyl group-containing compound in the liquid crystal sealant composition, and is substantially de-alcoholized. It is desirable that substantially no silyl groups remain since the appearance of the seal after panel bonding is good.
- the alcohol-condensation reaction due to the remaining alkoxysilyl groups in the seal proceeds during the heat-press bonding step using a single wafer hot press, It may cause deterioration of the seal appearance such as foam inside the seal.
- an amine-based hardener is present in the liquid crystal sealant composition, it promotes a dealcoholization condensation reaction by sol-gel hardening in a pre-curing step usually performed at a temperature of 60 to 11 ° to be described later.
- the alkoxy group does not substantially exist after the step (a).
- This amine-based hardener further functions as a curing agent for the epoxy resin component in the subsequent main heating curing step.
- the liquid crystal sealant composition of the present invention has good viscosity stability, sol-gel curability of alkoxysilyl groups in the pre-curing step, and epoxy resin component in the main heating step. From the viewpoint of curability to water, an imidazole-based curing agent having a melting point of 130 ° C. or more is more preferable.
- the filler (3) having an average particle size of 0.1 to 1 O ⁇ m used in the present invention may be any filler which can be used as a filler in the field of electronic materials.
- inorganic fillers such as kaolin, talc, asbestos powder, quartz powder, mica, and glass fiber.
- known organic fillers such as polymethyl methacrylate, polystyrene, copolymers obtained by copolymerizing monomers copolymerizable therewith, and core-shell acryl particles can also be used.
- the average particle size of the filler (3) used in the present invention is from 0.1 to 10 m, preferably from 0.3 to 5 m by a laser method.
- the average particle diameter is within the above range, the dimensional stability of the cell gap width during the production of the liquid crystal cell is further improved, which is preferable.
- the amount of the filler (3) used in the present invention is preferably 5 to 30% by weight based on 100% by weight of the total liquid crystal sealing agent, more preferably 10 to 2%. 0% by weight.
- the range of use of the filler is within the above range, the application stability of the liquid crystal sealant composition on the glass substrate is good, and the dimensional stability of the cell gap width is also good.
- Epoxy resin having an average of 1.2 or more epoxy groups in one molecule
- an epoxy resin not modified with alkoxysilyl may be used in combination. It is possible.
- the epoxy resin used in combination is preferably an epoxy resin having an average of 1.2 or more epoxy groups in one molecule, preferably an average of 1.7 or more epoxy groups in one molecule, and particularly preferably an average of 2 or more epoxy groups. It is more preferable that the number is not less than 6 and not more than 6. It is preferred that the average number of epoxy groups in one molecule be 1.2 or more, because heat resistance is improved.
- Each of these epoxy resins may be used alone or as a mixture of different resins, and can be used at room temperature irrespective of solid or liquid.
- epoxy resins are not particularly limited as long as they are epoxy resins containing a predetermined amount of epoxy groups or a mixture thereof.
- a mixture of a monofunctional epoxy resin and a polyfunctional epoxy resin or a single or a mixture of polyfunctional epoxy resins is used. be able to. Further, those modified epoxy resins and the like can also be used.
- the number of functional groups of the epoxy resin in the liquid crystal sealant composition can be determined by liquid chromatography, and then the number of functional groups specific to the epoxy resin can be determined from the epoxy group equivalent and the weight average molecular weight.
- epoxy resins having at least two epoxy groups in one molecule include aliphatic glycidyl ether compounds, aromatic glycidyl ether compounds, trisphenol-type daricidyl ether compounds, hydroquinone-type glycidyl ether compounds, Resorcinol-type glycidyl ether compound, aliphatic glycidyl ester compound, aromatic dalicidyl ester compound, aliphatic dalicidyl ether ester compound, aromatic dalicidyl ether ester compound, alicyclic dalicidyl ether compound, aliphatic dalicidyl amine compound, bisphenol Type daricidyl ether compound, aromatic glycidylamine compound, hydantoin type daricidyl compound, biphenyl type glycidyl compound, nopolak type glycidyl ether compound, containing glycidyl group Yes (meth) acrylic copolymers,
- modified epoxy resins other than the alkoxysilyl group-containing modified epoxy resin may also be mixed as long as the properties of the sealant composition of the present invention are not impaired. It is also possible to use.
- modified epoxy resins include urethane-modified epoxy resin, polysulfide-modified epoxy resin, rubber-modified epoxy resin (modified with CTBN, ATBN, etc.), and polya Luxylene glycol type epoxy resin, bisphenol with addition of ether elastomer
- A-type epoxy resin, acrylic-modified epoxy resin and the like can be mentioned.
- the rubbery modified product retains its shape as particles in the epoxy shelf.
- liquid crystal sealing composition of the present invention in order to improve dispensing applicability and screen printability, (5).
- the amount of the (5) aprotic solvent inert to epoxy groups used in the present invention is preferably 5 to 30% by weight in 100% by weight of the liquid crystal sealing composition.
- the amount of the solvent used is within the above range, the wettability to an adherend such as a glass substrate is good, and the dispensing applicability and screen printability are good.
- a protic solvent such as propylene glycol methyl ether or dipropylene glycol methyl ether promotes (1) the alcoholicylyl group-containing epoxy resin's dealcoholization reaction during storage of the liquid crystal sealant composition, and the liquid crystal sealant. This is not preferred because the viscosity stability of the composition tends to be impaired.
- additives such as an ion trapping agent, an ion exchange agent, a leveling agent, a pigment, a dye, a plasticizer, and an antifoaming agent can be used.
- the preparation of the liquid crystal sealing composition of the present invention requires (1) an alkoxysilyl group-containing modified epoxy resin, (2) a latent epoxy curing agent, and (3) a filler having an average particle size of 10 am or less.
- Epoxy resin having an average of 1.2 or more epoxy groups in one molecule (5) Epoxy group compatible with epoxy resin and having a boiling point in the range of 140 to 220
- An inert aprotic solvent, (6) other additives and the like may be appropriately added and mixed, and there is no particular limitation.
- the mixing is carried out through a well-known kneading machine such as a double-arm stirrer, a roll kneader, a twin-screw extruder, a pole mill kneader, etc. , Stored.
- a well-known kneading machine such as a double-arm stirrer, a roll kneader, a twin-screw extruder, a pole mill kneader, etc.
- the viscosity of the liquid crystal sealant composition before curing is not particularly limited, but the viscosity at 25 ° C. measured by an E-type viscometer is preferably 1 to 100 OP as, more preferably 5 to 5
- the range of 100 Pas is more preferable, and the range of 10 to 200 Pas is more preferable.
- the liquid crystal display panel of the present invention is prepared by printing or dispensing the liquid crystal sealant composition of the present invention on a bonding seal component of a glass or plastic liquid crystal cell substrate. After pre-curing at ° C, alignment with the other uncoated substrate is performed, and then the substrate is heat-pressed at 100 to 160 ° C. It is manufactured by a method of bonding and fixing to a uniform thickness in the range of 2 to 7 m. At this time, when the liquid crystal sealant composition is completely cured and bonded and sealed, it is necessary to perform a pre-curing process in advance to remove the demethanol component and volatile components in the liquid crystal sealant composition.
- the temperature is in the range of 60 to 110 ° C, and the drying time is & up to 60 minutes. It is preferable to set the temperature of the pre-curing to a high temperature because drying can be performed in a short time.
- the liquid crystal cell substrate to be used include a glass substrate and a plastic substrate.
- a so-called glass substrate for a liquid crystal cell or a plastic substrate having a transparent electrode typified by indium oxide, an alignment film typified by polyimide, etc., and other inorganic ion shielding films, etc. are applied to necessary parts. Is used.
- the method for applying the liquid crystal sealant composition to the substrate is not particularly limited.
- the method can be performed by a screen printing application method or a dispenser application method. After application, if necessary It is pre-dried, bonded, and bonded by heat-press adhesive bonding.
- the heat-curing conditions at this time are not particularly limited, and are approximately 0.5 to 24 hours at approximately 100 to 160 ° C.
- the conditions under which the temporary gap retention can be ensured are not particularly limited, but are preferably at 100 to 160 ° C for about 2 to 10 minutes.
- the pressure may be released, removed, and then the product may be manufactured through two or more heating steps or curing steps, such as fully curing in a heating oven adjusted to the same temperature.
- sheet-fed heat press means a heat press machine of a specification for joining one set at a time
- a sheet-fed heat press capable of applying heat under vacuum is a vacuum sheet-fed heat press
- a rigid single-wafer heat press of a type that is forcibly heated and pressed and bonded through a hot plate at atmospheric pressure is known. Any single-wafer heat press method may be used. Further, it is also possible to use a multi-stage hot press separately from the single-wafer hot press or the like in the hot press / bonding step.
- the liquid crystal display panel of the present invention means that the liquid crystal sealant composition of the present invention is printed or dispensed on a bonding seal component of a glass or plastic liquid crystal cell substrate, and is pre-cured at 60 to 110 ° C. After alignment with the other uncoated target substrate, the substrate is hot-pressed at 100 to 160 ° C, and the substrate is
- This is a liquid crystal display device obtained by injecting a liquid crystal material into the cell and sealing the injection hole with a two-liquid curable or ultraviolet curable liquid crystal sealing material composition.
- a two-component curing type or ultraviolet curing type liquid crystal sealing material composition a known material may be used.
- the liquid crystal display device obtained by the present invention is, for example, a TN (Twisted Nematic) liquid crystal device or an STN liquid crystal device proposed by M. Schadt and W. Hefrich. Type (Super Twisted Nematic) liquid crystal device, or a ferroelectric type liquid proposed by Clark (NAC 1 ark) and Lagawell (ST Lü rwa 11 1)
- Preferred examples include a crystal element and a liquid crystal display element in which a thin film transistor (TFT) is provided for each pixel. .
- TFT thin film transistor
- test panel for liquid crystal display manufactured through the sheet-fed press hardening process under the conditions shown in Example 1 was magnified with a 20 ⁇ magnifying glass and observed. The presence or absence of a defective seal due to foaming was measured.
- the shear bond strength of the adhesive test piece prepared in the same manner as in the adhesive test was measured at 1.20 ° C in the same manner as in the adhesive test. If the adhesive strength is 20 MPa or more, the symbol ⁇ ⁇ ⁇ indicates that the adhesiveness is good, and if it is 1 OMPa or more and less than 2 OMPa, the symbol ⁇ ⁇ ⁇ indicates that the adhesiveness is slightly inferior. The case where it was found was described in the examples with the symbol X as poor adhesiveness.
- the adhesive test piece prepared in the same manner as in the adhesion test was subjected to a pressure-cooking test for 20 hours under the conditions of 121 ° (2 atmospheres, 100% humidity), and the shear bond strength was measured in the same manner as the adhesion test.
- the adhesive strength is 2 OMPa or more
- the symbol ⁇ indicates that the adhesiveness is good
- the adhesive strength is 1 OMPa or more and less than 2 OMPa
- the symbol ⁇ ⁇ ⁇ indicates that the adhesiveness is slightly inferior.
- the case where it was less than 10 MPa was described in the Examples with the symbol X as poor adhesiveness.
- tetramethoxysilane manufactured by Shin-Etsu Chemical Co., Ltd., trade name KBM04
- dibutyltin dilaurate manufactured by Nitto Danisei Co., Ltd., trade name: Neostan U-100
- a heat treatment was carried out for 5 hours while distilling off the produced methanol, and a pressure reduction treatment was carried out at the same temperature to distill off the methyl ethyl ketone, thereby producing a methoxysilyl group-containing modified epoxy resin.
- the epoxy equivalent of the obtained methoxysilyl-modified epoxy resin was 916 g / eq.
- Shin-Etsu Chemical Co., Ltd. product name “MU-120” (primary average particle size 0.02 m, determined by electron microscopy) was used as a comparative example.
- epoxy resin bisphenol A type liquid epoxy resin (Mitsui Chemicals Co., Ltd., trade name: Epomic R-140P; epoxy equivalent: 185 g / eq.), ⁇ -creso-Lunopolak epoxy resin (Nippon Kayaku Co., Ltd. Product name; EOCN— 1020-7 5; Epoxy equivalent 200 gZe Q. Softening point 75 ° C) and acrylyl rubber-modified epoxy resin according to Synthesis Example 3 below were selected and used.
- propylene glycol diacetate (a product name of “Denol PGDA” manufactured by Dazuma Chemical Co., Ltd.) (boiling point; 191 ° C).
- Propyleneglycol diacetate (manufactured by Dow Chemical Co., Ltd., product name: Danol PG DA) 15 parts xylylene phenol resin (manufactured by Mitsui Chemicals, product name: Milex XL C-LL) 30 parts, Cresol monopolop epoxy resin (Nippon Kagaku) Pharmaceutical, trade name: EOCN— 1020—75) 10 parts are heated and dissolved.Furthermore, 15 parts of an alkoxysilyl group-containing modified epoxy resin of Synthesis Example 1, 10 parts of an acryl-modified epoxy resin of Synthesis Example 3, and Cureazole 2E4MZ— A 3 parts, CR-1017 parts as a filler are premixed with a mixer, then kneaded with three rolls until the solid material becomes 5 m or less, and the kneaded material is subjected to vacuum defoaming treatment.
- a liquid crystal sealant composition (P1) was obtained.
- the liquid crystal sealant composition (P1) had an initial viscosity of 50 Pa ⁇ s at 25 ° C. measured by an E-type viscometer.
- Table 2 shows the results of the bonding seal test of the liquid crystal sealant composition (P1), the results of measuring the glass transition temperature of the cured product, the results of the adhesion test, the results of the heat resistance adhesion test, and the results of the adhesion test.
- the joint seal test was performed as follows. 100 parts of the liquid crystal sealant composition (P1) was blended with 5 parts of a short glass fiber spacer of 5 and mixed well, and the vacuum degassed composition was obtained. On a processed glass substrate for a liquid crystal cell (hereinafter simply referred to as an ITO substrate), a pattern consisting of 4 cells, 1 inch in size, up, down, left and right, per substrate is applied by a dispenser. An ITO substrate having a thickness of 0.7 mm and a sealant application thickness of about 22 to 25 m was obtained.
- composition was blended according to the formulation in Table 1, and a liquid crystal sealing composition within the scope of the present invention was produced in the same manner as in Example 1, and evaluated in the same manner as in Example 1.
- a liquid crystal sealant composition (C1 to C3) was prepared in the same manner as in Example 1 except that a modified epoxy resin containing an alkoxysilyl group was not used and a silane coupling agent component was used as an additive component. Evaluation was made in the same manner as in 1.
- liquid crystal sealant composition of the present invention was suitable for a single-wafer press heat bonding method and was excellent in adhesiveness and heat resistance.
- Comparative Examples 1 to 3 do not use a modified epoxy resin containing an alkoxysilyl group, and thus are inferior in the sheet-fed press heat bonding method, heat resistance, and adhesiveness.
- table 1
- AMICURE VDH-J manufactured by Ajinomoto Co., Inc., 1,3-bis (hydrash'nocarho'ethyl) -5-if. Ropirhydantoin, cure ', -le 2E4MZ-A; 2,4-diamino-6- [2'-ethyl-4'-methylimig Vril- ( ⁇ )]-ethyl-s-triacy, ,
- the liquid crystal sealant composition of the present invention is useful as a sealant for display panels of various devices because it has excellent adhesiveness, moisture permeability and heat resistance.
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Nonlinear Science (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Sealing Material Composition (AREA)
- Epoxy Resins (AREA)
- Liquid Crystal (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
Claims
Priority Applications (2)
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JP2004548037A JP4531566B2 (ja) | 2002-11-01 | 2003-10-24 | 液晶シール剤組成物及びそれを用いた液晶表示パネルの製造方法 |
US10/531,279 US7438958B2 (en) | 2002-11-01 | 2003-10-24 | Sealant composition for liquid crystal and process for producing liquid-crystal display panel with the same |
Applications Claiming Priority (2)
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JP2002319600 | 2002-11-01 | ||
JP2002/319600 | 2002-11-01 |
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WO2004039885A1 true WO2004039885A1 (ja) | 2004-05-13 |
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PCT/JP2003/013619 WO2004039885A1 (ja) | 2002-11-01 | 2003-10-24 | 液晶シール剤組成物及びそれを用いた液晶表示パネルの製造方法 |
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US (1) | US7438958B2 (ja) |
JP (1) | JP4531566B2 (ja) |
KR (1) | KR100628363B1 (ja) |
CN (1) | CN1327278C (ja) |
TW (1) | TW200410996A (ja) |
WO (1) | WO2004039885A1 (ja) |
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JPWO2006077886A1 (ja) * | 2005-01-18 | 2008-06-19 | 株式会社カネカ | 硬化性組成物 |
WO2006077886A1 (ja) * | 2005-01-18 | 2006-07-27 | Kaneka Corporation | 硬化性組成物 |
JP2006249342A (ja) * | 2005-03-14 | 2006-09-21 | Sumitomo Electric Ind Ltd | 接着剤組成物およびそれを用いた異方導電性接着剤 |
JP2007225772A (ja) * | 2006-02-22 | 2007-09-06 | Mitsui Chemicals Inc | 液晶シール剤及びそれを用いた液晶表示パネル |
JP2007224117A (ja) * | 2006-02-22 | 2007-09-06 | Mitsui Chemicals Inc | 液晶シール剤、及びそれを用いた液晶表示パネル |
CN101501560B (zh) * | 2006-08-04 | 2012-01-11 | 三井化学株式会社 | 液晶密封剂、使用其的液晶显示面板的制造方法及液晶显示面板 |
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JP5345393B2 (ja) * | 2006-08-04 | 2013-11-20 | 三井化学株式会社 | 液晶シール剤、それを用いた液晶表示パネルの製造方法、および液晶表示パネル |
JPWO2008016122A1 (ja) * | 2006-08-04 | 2009-12-24 | 三井化学株式会社 | 液晶シール剤、それを用いた液晶表示パネルの製造方法、および液晶表示パネル |
JP2009133964A (ja) * | 2007-11-29 | 2009-06-18 | Sekisui Chem Co Ltd | 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 |
JP2009162842A (ja) * | 2007-12-28 | 2009-07-23 | Jsr Corp | 液晶表示素子用シール剤及び液晶表示素子 |
WO2012014499A1 (ja) * | 2010-07-29 | 2012-02-02 | 三井化学株式会社 | 組成物、この組成物からなる表示デバイス端面シール剤用組成物、表示デバイス、およびその製造方法 |
JP5774006B2 (ja) * | 2010-07-29 | 2015-09-02 | 三井化学株式会社 | 組成物、この組成物からなる表示デバイス端面シール剤用組成物、表示デバイス、およびその製造方法 |
JP2011132541A (ja) * | 2011-03-22 | 2011-07-07 | Sumitomo Electric Ind Ltd | 接着剤組成物 |
KR20170002632A (ko) | 2014-07-24 | 2017-01-06 | 미쓰이 가가쿠 가부시키가이샤 | 액정 시일제, 및 액정 표시 패널의 제조 방법 |
Also Published As
Publication number | Publication date |
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TWI294443B (ja) | 2008-03-11 |
JP4531566B2 (ja) | 2010-08-25 |
KR100628363B1 (ko) | 2006-09-27 |
US7438958B2 (en) | 2008-10-21 |
US20060006362A1 (en) | 2006-01-12 |
TW200410996A (en) | 2004-07-01 |
JPWO2004039885A1 (ja) | 2006-03-02 |
CN1327278C (zh) | 2007-07-18 |
KR20050072452A (ko) | 2005-07-11 |
CN1703458A (zh) | 2005-11-30 |
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