WO2013180133A1 - 接着剤およびそれを用いた透明基板 - Google Patents
接着剤およびそれを用いた透明基板 Download PDFInfo
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- WO2013180133A1 WO2013180133A1 PCT/JP2013/064787 JP2013064787W WO2013180133A1 WO 2013180133 A1 WO2013180133 A1 WO 2013180133A1 JP 2013064787 W JP2013064787 W JP 2013064787W WO 2013180133 A1 WO2013180133 A1 WO 2013180133A1
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- thermoplastic resin
- adhesive
- resin
- glass
- transparent substrate
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/1055—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer
- B32B17/10697—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the resin layer, i.e. interlayer being cross-linked
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10889—Making laminated safety glass or glazing; Apparatus therefor shaping the sheets, e.g. by using a mould
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
- B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
- B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
- B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
- B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
- B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
- B32B17/10908—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin in liquid form
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
- C08G65/04—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers only
- C08G65/06—Cyclic ethers having no atoms other than carbon and hydrogen outside the ring
- C08G65/16—Cyclic ethers having four or more ring atoms
- C08G65/18—Oxetanes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/07—Aldehydes; Ketones
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J165/00—Adhesives based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Adhesives based on derivatives of such polymers
- C09J165/02—Polyphenylenes
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
- C09J171/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C09J171/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
- C09J171/08—Polyethers derived from hydroxy compounds or from their metallic derivatives
- C09J171/10—Polyethers derived from hydroxy compounds or from their metallic derivatives from phenols
- C09J171/12—Polyphenylene oxides
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
- Y10T428/31609—Particulate metal or metal compound-containing
- Y10T428/31612—As silicone, silane or siloxane
Definitions
- the present invention relates to an adhesive and a transparent substrate.
- display elements such as flat panel displays (FPDs: for example, liquid crystal display elements, organic EL display elements) have been reduced in weight and thickness from the viewpoints of transportability, storage properties, design properties, etc.
- FPDs flat panel displays
- a glass substrate is often used as a transparent substrate used for a display element.
- the glass substrate is excellent in transparency, solvent resistance, gas barrier properties, and heat resistance.
- the glass material constituting the glass substrate is reduced in weight and thickness, it exhibits a certain degree of flexibility, but is not sufficient, and there is a problem that handling is difficult due to insufficient impact resistance.
- Patent Documents 1 and 2 In order to improve the handleability of a thin glass substrate, a substrate having a resin layer formed on the glass surface is disclosed (for example, see Patent Documents 1 and 2). However, these substrates have insufficient adhesion between the glass and the resin layer, and there is a problem in reliability when exposed to high temperature and high humidity in the manufacturing process and evaluation process of the display device.
- Patent Document 3 when a thermoplastic resin film is covered and sealed from both sides of glass, the thermoplastic resin films are bonded to each other with an adhesive containing a resin having the same composition as that of the thermoplastic resin. Disclosure technology is disclosed. However, the adhesive of Patent Document 3 does not have sufficient adhesion to glass, and is insufficient in adhesion when glass and a resin film are bonded.
- the present invention has been made in order to solve the above-described conventional problems.
- the object of the present invention is to provide excellent adhesiveness at high temperatures when either glass or thermoplastic resin is used as an adherend. It is to provide an adhesive to be shown.
- the adhesive of the present invention is an adhesive in which an adherend is a resin layer containing glass and / or a thermoplastic resin (A), and includes a thermoplastic resin (b), a thermosetting monomer (c), and curing.
- a thermoplastic resin (b2), the thermosetting monomer (c) is compatible with the thermoplastic resin (b), and the content of the thermosetting monomer (c) is thermoplastic.
- the amount is 5 to 50 parts by weight per 100 parts by weight of the resin (b).
- the thermoplastic resin (b) is compatible with the thermoplastic resin (A).
- the thermoplastic resin (b) has a weight average molecular weight of 30 ⁇ 10 4 or less.
- the thermosetting monomer (c) has an epoxy group and / or an oxetanyl group.
- the thermosetting monomer (c) has an alkoxysilane group, a silicate group and / or a siloxane group.
- the content of the curing catalyst is 1 to 20 parts by weight with respect to 100 parts by weight of the thermosetting monomer (c).
- the curing catalyst is a thermal latent curing catalyst.
- the curing catalyst is an imidazole catalyst.
- the adhesive agent of this invention further contains the solvent which can melt
- the solvent is a ketone solvent and / or an aromatic solvent.
- a transparent substrate is provided. This transparent substrate includes glass, an adhesive layer, and a resin layer containing a thermoplastic resin (A), and the adhesive layer is formed of the adhesive.
- the haze value of the transparent substrate of the present invention is 10% or less.
- the manufacturing method of a transparent substrate is provided.
- a method for producing a transparent substrate comprising applying the resin solution (a), wherein the resin solution (a) contains a thermoplastic resin (A) and a solvent, and the solvent contained in the adhesive The boiling point is equal to or higher than the solvent of the resin solution (a).
- thermoplastic resin by including a specific thermoplastic resin and a thermosetting monomer, it is possible to provide an adhesive exhibiting excellent adhesiveness when using either glass or thermoplastic resin as an adherend. Can do. Moreover, the adhesive of this invention is excellent also in transparency and heat resistance.
- the adhesive of the present invention is an adhesive having a glass and / or resin layer as an adherend.
- the resin layer as the adherend contains a thermoplastic resin (A). That is, the adhesive of the present invention can be used for bonding glass and a resin layer including the thermoplastic resin layer (A). Moreover, the adhesive agent of this invention may be used also when adhere
- A. Glass As long as the glass is plate-shaped, any appropriate one can be adopted. Examples of the glass include soda lime glass, borate glass, aluminosilicate glass, and quartz glass according to the classification according to the composition. Moreover, according to the classification
- the content of alkali metal components (for example, Na 2 O, K 2 O, Li 2 O) in the glass is preferably 15% by weight or less, more preferably 10% by weight or less.
- the glass forming method is obtained by melting a mixture containing main raw materials such as silica and alumina, an antifoaming agent such as sodium nitrate and antimony oxide, and a reducing agent such as carbon at a temperature of 1400 ° C to 1600 ° C. After being formed into a thin plate shape, it is produced by cooling.
- the glass sheet forming method include a slot down draw method, a fusion method, and a float method.
- the glass formed into a plate shape by these methods may be chemically polished with a solvent such as hydrofluoric acid, if necessary, in order to reduce the thickness or improve the smoothness.
- the glass may be subjected to a coupling treatment.
- the coupling agent used in the coupling treatment include an epoxy terminal coupling agent, an amino group-containing coupling agent, a methacrylic group-containing coupling agent, and a thiol group-containing coupling agent.
- a commercially available glass may be used as it is, or a commercially available glass may be polished to have a desired thickness.
- examples of commercially available glasses include “7059”, “1737” or “EAGLE 2000” manufactured by Corning, “AN100” manufactured by Asahi Glass, “NA-35” manufactured by NH Techno Glass, and “OA-10” manufactured by Nippon Electric Glass. "D263” or “AF45” manufactured by Schott.
- thermoplastic resin (A) Any appropriate thermoplastic resin can be adopted as the thermoplastic resin (A) as long as the effects of the present invention are obtained.
- the thermoplastic resin include polyarylate resins; polyethersulfone resins; polycarbonate resins; epoxy resins; acrylic resins; polyester resins such as polyethylene terephthalate and polyethylene naphthalate; Examples thereof include cycloolefin resins such as norbornene resins, polyimide resins, polyamide resins, polyamideimide resins, polysulfone resins, polyetherimide resins, and polyurethane resins. These thermoplastic resins can be used alone or in admixture of two or more.
- the glass transition temperature (Tg) of the thermoplastic resin (A) is preferably more than 200 ° C., more preferably more than 200 ° C. and not more than 350 ° C., further preferably 210 ° C. to 330 ° C., and particularly preferably 230 ° C. Between °C and 300 °C. Since the adhesive of the present invention is excellent in heat resistance, for example, a resin layer containing a thermoplastic resin having a high glass transition temperature is adopted as an adherend, and a laminated body (for example, a transparent substrate described later) after bonding has a high temperature. It is useful in applications that are exposed to the environment (for example, 200 ° C. or higher).
- the thermoplastic resin (A) has a weight average molecular weight in terms of polystyrene of preferably 2.0 ⁇ 10 4 to 150 ⁇ 10 4 , more preferably 3.0 ⁇ 10 4 to 120 ⁇ 10 4 , Particularly preferred is 3.5 ⁇ 10 4 to 90 ⁇ 10 4 . If it is a resin layer containing the thermoplastic resin (A) which has a weight average molecular weight of such a range, it is excellent in compatibility with an adhesive agent and can be firmly bonded. In addition, the weight average molecular weight in this specification can be calculated
- GPC gel permeation chromatography
- Adhesive The adhesive of the present invention comprises a thermoplastic resin (b), a thermosetting monomer (c), and a curing catalyst.
- thermoplastic resin (b) As the thermoplastic resin (b), an aromatic thermoplastic resin (b1) or an alicyclic thermoplastic resin (b2) is used. Preferably, an aromatic thermoplastic resin (b1) is used. You may use together an aromatic thermoplastic resin (b1) and an alicyclic thermoplastic resin (b2). If such a thermoplastic resin (b) is used, an adhesive having excellent adhesiveness and transparency can be obtained.
- aromatic thermoplastic resin (b1) examples include polyarylate resins, polycarbonate resins, polyphenylene ether resins, aromatic polyester resins, polysulfone resins, polyether sulfone resins, and polyether ethers.
- aromatic polyester resins examples include ketone resins, polyimide resins, polyamideimide resins, polyetherimide resins, polyurethane resins, and the like.
- alicyclic thermoplastic resin (b2) examples include norbornene resins.
- the thermoplastic resin (b) may have a hydroxyl group at the terminal.
- the thermoplastic resin (b) having a hydroxyl group at the terminal can be obtained by modifying the terminal hydroxyl group of the thermoplastic resin (b) by any appropriate method. You may use together the thermoplastic resin (b) which has a hydroxyl group at the terminal, and the thermoplastic resin (b) which does not have a hydroxyl group at the terminal. If the thermoplastic resin (b) having a hydroxyl group at the terminal is used, strong adhesion is obtained by the interaction between the thermoplastic resin (b) and the thermosetting monomer (c) (or a resin obtained by curing the thermosetting monomer). Sex is expressed.
- the hydroxyl group in the thermoplastic resin (b) is preferably a phenolic hydroxyl group. It is because stronger adhesiveness can be expressed.
- thermoplastic resin (b) is compatible with the thermosetting monomer (c). If an adhesive containing such a thermoplastic resin (b) is used, a strong adhesive force can be obtained and an adhesive having excellent transparency can be obtained.
- thermoplastic resin (b) is compatible with the thermoplastic resin (A) in the resin layer (adhered body).
- the adhesive component and the adherend component are not phase-separated on the adhesive surface, and a strong adhesive force can be obtained.
- the weight average molecular weight of the thermoplastic resin (b) is preferably 18 ⁇ 10 4 or less, more preferably 1 ⁇ 10 4 to 17 ⁇ 10 4 , and particularly preferably 2 ⁇ 10 4 to 4 in terms of polystyrene. 15 ⁇ 10 4 .
- the weight average molecular weight of the thermoplastic resin (b) exceeds 18 ⁇ 10 4 , the compatibility of the adhesive with the thermoplastic resin (A) is lowered, and the adhesive force may be lowered.
- the glass transition temperature (Tg) of the thermoplastic resin (b) exceeds 200 ° C., preferably exceeds 200 ° C. and is 350 ° C. or less, more preferably 210 ° C. to 330 ° C., particularly preferably 230 ° C. to 300 ° C. ° C. If the thermoplastic resin (b) having a glass transition temperature (Tg) in such a range is used, an adhesive having excellent heat resistance and exhibiting strong adhesive force even at high temperatures (eg, 200 ° C. or higher) is obtained. be able to.
- thermosetting monomer (c) examples include epoxy monomers, oxetanyl monomers, acrylic monomers, silicone monomers, and the like. More preferably, a thermosetting monomer (c) having at least one group selected from an oxetanyl group and an epoxy group is used. Specific examples of such thermosetting monomer (c) include 3-glycidoxypropyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropylmethyldiethoxy.
- Examples thereof include silane, 3-glycidoxypropyltriethoxysilane, 3-ethyl-3-hydroxymethyloxetane (oxetane alcohol), 2-ethylhexyl oxetane, and xylylenebisoxetane.
- the thermosetting monomer (c) may have at least one group selected from an alkoxysilyl group, a silicate group, and a siloxane group. More preferably, an epoxy monomer or an oxetane monomer having at least one group selected from an alkoxysilyl group, a silicate group, and a siloxane group is used. If such a thermosetting monomer (c) is used, an adhesive having excellent adhesive strength can be obtained.
- thermosetting monomer (c) is compatible with the thermoplastic resin (b). If an adhesive containing such a thermosetting monomer (c) is used, a strong adhesive force can be obtained and an adhesive having excellent transparency can be obtained.
- the molecular weight of the thermosetting monomer (c) is preferably 1 ⁇ 10 4 or less, more preferably 5 ⁇ 10 3 or less. If the thermosetting monomer (c) has a molecular weight in such a range, an adhesive having excellent compatibility with the thermoplastic resin (b) and excellent transparency can be obtained.
- thermosetting monomers (c) Commercially available products may be used as the thermosetting monomer (c).
- Commercially available thermosetting monomers (c) include, for example, trade name “KBM-403” manufactured by Shin-Etsu Chemical Co., Ltd., trade name “Celoxide 2021” manufactured by Daicel Chemical Industries, Ltd., trade name “EHPE3150”, manufactured by Toa Gosei Co., Ltd. Trade name “Aron Oxetane 221” and trade name “OX-SQ”.
- the content of the thermosetting monomer (c) is 5 to 50 parts by weight, preferably 10 to 40 parts by weight, more preferably 100 parts by weight of the thermoplastic resin (b). Is 15 to 37 parts by weight.
- the content ratio of the thermosetting monomer (c) to 100 parts by weight of the thermoplastic resin (b) is less than 5 parts by weight, there is a possibility that sufficient adhesive force may not be obtained. There is a risk of cloudiness.
- the curing catalyst preferably has thermal potential. Moreover, it is preferable that the curing catalyst can start the curing reaction at a temperature of 150 ° C. or lower.
- the curing catalyst include imidazole catalysts, Lewis acid catalysts such as BF 3 .OEt 3 , aluminum complex catalysts, triphenylphosphine catalysts, triarylsulfonium salt catalysts, and the like. Among these, an imidazole catalyst is preferable.
- the curing reaction rate of the curable monomer and the compatibility rate of the thermoplastic resin (A) and the adhesive can be matched by an appropriate activation temperature of the imidazole-based catalyst, and the adhesive component And the adherend component can be firmly bonded.
- the imidazole catalyst examples include 2-methylimidazole, 1,2-dimethylimidazole, 2-ethyl-4-methylimidazole, 2-undecylimidazole, 2-heptadecylimidazole, 2-phenylimidazole, 2- Examples include phenyl-4-methylimidazole, 1-benzyl-2-methylimidazole, 1-benzyl-2-phenylimidazole, 1-cyanoethyl-2-methylimidazole, 1-cyanoethyl-2-ethyl-4-methylimidazole, and the like. .
- the content of the curing catalyst is preferably 1 to 30 parts by weight, more preferably 3 to 25 parts by weight, particularly preferably 100 parts by weight of the thermosetting monomer (c). 5 to 20 parts by weight. If the content of the curing catalyst with respect to 100 parts by weight of the thermosetting monomer (c) exceeds 30 parts by weight, the adhesive may be colored, and if it is less than 1 part by weight, the effect of adding the curing catalyst cannot be obtained. There is a fear.
- the adhesive may further contain a solvent.
- a solvent capable of dissolving the thermoplastic resin (A) in the resin layer (adhered body) is preferable. With such a solvent, the adhesive penetrates into the resin layer (adhered body) and exhibits a strong adhesive force.
- an aromatic solvent or a ketone solvent is preferably used.
- An aromatic solvent and a ketone solvent may be used in combination.
- the ketone solvent include methyl ethyl ketone, methyl isobutyl ketone, cyclopentanone, cyclohexanone and the like.
- Specific examples of the aromatic solvent include xylene, toluene, benzene, phenol and the like.
- the solvent may be a mixed solvent of an aromatic solvent and / or a ketone solvent and another solvent.
- the amount of the solvent used is preferably such that the viscosity of the adhesive is 0.1 mPa ⁇ s to 1000000 mPa ⁇ s.
- the viscosity of the adhesive is more preferably 0.2 mPa ⁇ s to 500,000 mPa ⁇ s, and particularly preferably 0.3 mPa ⁇ s to 300,000 mPa ⁇ s.
- the adhesive may further contain any appropriate additive depending on the purpose.
- the additives include diluents, anti-aging agents, denaturing agents, surfactants, dyes, pigments, anti-discoloring agents, ultraviolet absorbers, softeners, stabilizers, plasticizers, antifoaming agents, reinforcing agents, and the like. Is mentioned.
- the kind, number, and amount of the additive contained in the resin layer can be appropriately set according to the purpose.
- FIG. 1 is a schematic cross-sectional view of a transparent substrate according to a preferred embodiment of the present invention.
- the transparent substrate 100 includes a glass 10 and resin layers 30 and 30 ′ disposed on one side or both sides of the glass 10 (preferably on both sides as in the illustrated example) via adhesive layers 20 and 20 ′.
- the transparent substrate may include any appropriate other layer on the opposite side of the resin layer from the inorganic glass, if necessary. Examples of the other layers include a transparent conductive layer and a hard coat layer.
- the adhesive of the present invention is excellent in transparency as described above, and can suppress the influence on the transparency of the adherend. Therefore, if the adhesive of the present invention is used, the transparent substrate having excellent transparency Can be obtained.
- the glass described in the above section A is used.
- the thickness of the glass is preferably 80 ⁇ m or less, more preferably 20 ⁇ m to 80 ⁇ m, and particularly preferably 30 ⁇ m to 70 ⁇ m. Since the transparent substrate has a resin layer on one side or both sides of the glass, a transparent substrate having excellent impact resistance can be obtained even if the thickness of the glass is reduced.
- the light transmittance of the glass 10 at a wavelength of 550 nm is preferably 85% or more.
- the refractive index of the glass 10 at a wavelength of 550 nm is preferably 1.4 to 1.65.
- the density of the glass 10 is preferably 2.3 g / cm 3 to 3.0 g / cm 3 , more preferably 2.3 g / cm 3 to 2.7 g / cm 3 . If it is the glass of the said range, a lightweight transparent substrate will be obtained.
- the adhesive layers 20 and 20 ′ can be formed by applying the adhesive described in the above section C on the glass 10 and then heating the adhesive.
- the heating temperature is preferably 80 ° C. to 200 ° C.
- the thickness of the adhesive layers 20, 20 ′ is preferably 0.001 ⁇ m to 20 ⁇ m, more preferably 0.001 ⁇ m to 15 ⁇ m, and particularly preferably 0.01 ⁇ m to 10 ⁇ m. Within such a range, the glass 10 and the resin layers 30 and 30 'can be firmly bonded even under high temperature and high humidity, and a transparent substrate having excellent transparency can be obtained.
- the resin layers 30 and 30 ' are made of the material described in the above section B.
- the resin layers 30 and 30 ′ can be formed by attaching a resin film on the glass 10 through the adhesive and then heating. Alternatively, the resin solution (a) may be applied on the adhesive applied on the glass 10 and then heated to form.
- the resin film can be obtained, for example, by applying the resin solution (a) to any appropriate base material and then heating.
- the resin solution (a) contains the thermoplastic resin (A) and a solvent. Any appropriate solvent can be adopted as the solvent contained in the resin solution (a) as long as the thermoplastic resin (A) can be dissolved.
- the solvent include aromatic solvents such as toluene and xylene; ketone solvents such as cyclopentanone and methyl isobutyl ketone; ether solvents such as tetrahydrofuran and propylene glycol methyl ether; halogen solvents such as dichloromethane and trichloroethane. Is mentioned. These solvents may be used alone or in combination of two or more.
- the substrate preferably has solvent resistance to the solvent of the resin solution (a). Examples of the material constituting such a substrate include polyethylene terephthalate (PET) and polyethylene naphthalate (PEN).
- the resin film may be stuck on the glass 10 with the solvent remaining.
- the residual solvent in the resin film can be removed by heating after sticking (for example, heating at the time of forming the adhesive layer).
- the amount of residual solvent in the resin film before heating after sticking is preferably 10% by weight to 20% by weight with respect to the total weight of the resin film.
- the boiling point of the solvent contained in the adhesive is preferably equal to or higher than the boiling point of the solvent of the resin solution (a). If the boiling point of the solvent contained in the adhesive is equal to or higher than the boiling point of the solvent of the resin solution (a), it is included in the adhesive during heating after application of the resin solution (a) or after application of the resin film. It is difficult for the solvent to be volatilized prior to volatilization of the solvent of the resin solution (a) or the residual solvent in the resin film, and as a result, foaming in the adhesive layer can be prevented.
- the thickness of the resin layers 30 and 30 ′ is preferably 5 ⁇ m to 100 ⁇ m, more preferably 10 ⁇ m to 80 ⁇ m, and particularly preferably 15 ⁇ m to 60 ⁇ m.
- the thickness of each resin layer may be the same or different.
- the thickness of each resin layer is the same.
- each resin layer may be composed of the same resin or a resin having the same characteristics, or may be composed of different resins.
- each resin layer is made of the same resin. Therefore, most preferably, each resin layer is comprised so that it may become the same thickness with the same resin. With such a configuration, even if heat treatment is performed, thermal stress is evenly applied to both surfaces of the glass, and thus warpage and undulation are extremely unlikely to occur.
- the light transmittance of the resin layers 30 and 30 ′ at a wavelength of 550 nm is preferably 80% or more.
- the refractive index of the resin layers 30 and 30 ′ at a wavelength of 550 nm is preferably 1.3 to 1.7.
- the total thickness of the transparent substrate 100 is preferably 150 ⁇ m or less, more preferably 140 ⁇ m or less, and particularly preferably 80 ⁇ m to 130 ⁇ m.
- the light transmittance at a wavelength of 550 nm of the transparent substrate 100 is preferably 80% or more, more preferably 85% or more.
- the transparent substrate 100 has a light transmittance reduction rate of 5% or less after heat treatment at 180 ° C. for 2 hours. This is because, with such a reduction rate, a practically acceptable light transmittance can be ensured even when heat treatment necessary for the manufacturing process of the display element and the solar cell is performed.
- the haze value of the transparent substrate 100 is preferably 10% or less, more preferably 5% or less.
- the transparent substrate has such characteristics, for example, when used for a display element, good visibility can be obtained.
- the transparent substrate may be provided with any appropriate other layer on the opposite side of the resin layer from the glass, if necessary.
- a transparent conductive layer, a hard-coat layer, etc. are mentioned, for example.
- the transparent conductive layer can function as an electrode or an electromagnetic wave shield when the transparent substrate is used as a display element, a (touch) input element, or a solar cell substrate.
- Examples of materials that can be used for the transparent conductive layer include metals such as copper and silver; metal oxides such as indium tin oxide (ITO) and indium zinc oxide (IZO); and conductive materials such as polythiophene and polyaniline.
- Examples of the polymer include a composition containing carbon nanotubes.
- the hard coat layer has a function of imparting chemical resistance, scratch resistance and surface smoothness to the transparent substrate.
- any appropriate material can be adopted as the material constituting the hard coat layer.
- the material constituting the hard coat layer include an epoxy resin, an acrylic resin, a silicone resin, and a mixture thereof. Among these, an epoxy resin excellent in heat resistance is preferable.
- the hard coat layer can be obtained by curing these resins with heat or active energy rays.
- the thickness was measured using an Anritsu digital micrometer “KC-351C type”.
- a solution prepared by dissolving 12.05 g (0.059 mol) of terephthalic acid chloride in 181 g of chloroform was added to this solution all at once with stirring, and the mixture was stirred at room temperature for 120 minutes. Thereafter, the polymerization solution was allowed to stand to separate the chloroform solution containing the polymer, then washed with acetic acid water, washed with ion-exchanged water, and then poured into methanol to precipitate the polymer. The precipitated polymer was filtered and dried under reduced pressure to obtain 23 g of a white polymer.
- the obtained polymer had a glass transition temperature (Tg) of 260 ° C. and a weight average molecular weight of 6 ⁇ 10 4 .
- thermoplastic resin 3.88 g (0.012 mol) of 4,4 ′-(1,3-dimethylbutylidene) bis (2,6-dimethylphenol) in a reaction vessel equipped with a stirrer 4,4 ′-(diphenylmethylene) bisphenol 4.18 g (0.012 mol), 4,4 ′-(1-phenylethylidene) bisphenol 5.17 g (0.018 mol), bisphenol A 4.07 g (0.018 mol) Pt-butylphenol 0.092 g and benzyltriethylammonium chloride 0.384 g were dissolved in 1 g sodium hydroxide solution 160 g.
- a solution prepared by dissolving 12.05 g (0.059 mol) of terephthalic acid chloride in 181 g of chloroform was added to this solution while stirring, and the mixture was stirred at room temperature for 120 minutes. Thereafter, the polymerization solution was allowed to stand to separate the chloroform solution containing the polymer, then washed with acetic acid water, washed with ion-exchanged water, and then poured into methanol to precipitate the polymer. The precipitated polymer was filtered and dried under reduced pressure to obtain 23 g of a white polymer.
- the polymer had a Tg of 260 ° C. and a weight average molecular weight of 5 ⁇ 10 4 .
- thermoplastic resin In a reaction vessel equipped with a stirrer, 16.1 g (0.041 mol) of 4,4 '-(1-methyl-ethylidene) bis (2-cyclohexylphenol), bisphenol A6. 25 g (0.027 mol), 0.496 g of benzyltriethylammonium chloride and 0.074 g of pt-butylphenol were dissolved in 307 g of 1M sodium hydroxide solution.
- thermoplastic resin In a reaction vessel equipped with a stirrer, 7.65 g (0.028 mol) of 4,4 '-(1,3-dimethylbutylidene) bisphenol, 4,4'-(1 -Phenylethylidene) bisphenol 12.35 g (0.043 mol), benzyltriethylammonium chloride 0.444 g, and pt-butylphenol 0.022 g were dissolved in 1 M sodium hydroxide solution 185 g.
- Example 1 (Adhesive adjustment) 10 g of the white polymer obtained in Production Example 1 as the thermoplastic resin (b) and 3-ethyl-3 (((3-ethyloxetane-3-yl) methoxy) methyl) as the thermosetting monomer (c) 0.6 g of oxetane (trade name “Aron oxetane OXT-221” manufactured by Toa Gosei Co., Ltd.) and 2.5 g of epoxy group terminal coupling agent (trade name “KBM403” manufactured by Shin-Etsu Chemical Co., Ltd.) and 1 as a curing catalyst , 2-dimethylimidazole 0.4 g and dibutyltin dilaurate 0.05 g were dissolved in 30 g of cyclopentanone to obtain an adhesive.
- oxetane trade name “Aron oxetane OXT-221” manufactured by Toa Gosei Co., Ltd.
- Glass One side of glass with a thickness of 50 ⁇ m, length 10 cm x width 4 cm is washed with methyl ethyl ketone, then treated with corona, and subsequently coupled with an epoxy group terminal coupling agent (trade name “KBM403” manufactured by Shin-Etsu Chemical Co., Ltd.). went. A similar treatment was performed on the other surface of the glass.
- the cyclopentanone solution (concentration 9% by weight) of the white polymer obtained in Production Example 4 was coated on a polyethylene terephthalate (PET) film (trade name “Lumirror” manufactured by Toray Industries, Inc.), and on the PET film, A resin film having a thickness of 27 ⁇ m and a residual solvent amount of 13% by weight was obtained.
- PET polyethylene terephthalate
- the resin film on the PET film was adhered to the glass through the adhesive to obtain a laminate.
- the laminate was heated at 90 ° C. for 4 minutes, 130 ° C. for 4 minutes, and 150 ° C. for 4 minutes.
- the PET was peeled off and further heated at 150 ° C. for 12 minutes to obtain a transparent substrate (glass (thickness 50 ⁇ m) / adhesive layer (thickness 1 ⁇ m: one side) / resin layer (thickness 27 ⁇ m: one side)).
- Example 2 In adjusting the adhesive, the amount of 3-ethyl-3 (((3-ethyloxetane-3-yl) methoxy) methyl) oxetane (trade name “Aronoxetane OXT-221” manufactured by Toagosei Co., Ltd.) A transparent substrate was obtained in the same manner as in Example 1, except that the amount of the epoxy group terminal coupling agent (manufactured by Shin-Etsu Chemical Co., Ltd., trade name “KBM403”) was 3 g.
- the epoxy group terminal coupling agent manufactured by Shin-Etsu Chemical Co., Ltd., trade name “KBM403”
- thermoplastic resin (b) polyarylate (trade name “M-4000”, manufactured by Unitika Ltd., weight average molecular weight: 5 ⁇ 10 4 ) 10 g of cyclopentanone solution (concentration 21% by weight), thermosetting monomer (C) 0.3 g of 3-ethyl-3 (((3-ethyloxetane-3-yl) methoxy) methyl) oxetane (trade name “Aronoxetane OXT-221” manufactured by Toagosei Co., Ltd.)
- An adhesive was obtained by mixing 2.0 g of a coupling agent (trade name “KBM403”, manufactured by Shin-Etsu Chemical Co., Ltd.), 0.15 g of 1,2-dimethylimidazole and 0.2 g of dibutyltin dilaurate as a curing catalyst.
- Glass One side of glass with a thickness of 50 ⁇ m, length 10 cm x width 4 cm is washed with methyl ethyl ketone, then treated with corona, and subsequently coupled with an epoxy group terminal coupling agent (trade name “KBM403” manufactured by Shin-Etsu Chemical Co., Ltd.). went. A similar treatment was performed on the other surface of the glass.
- the cyclopentanone solution (concentration 9% by weight) of the white polymer obtained in Production Example 4 was coated on a polyethylene terephthalate (PET) film (trade name “Lumirror”, manufactured by Toray Industries, Inc.), A resin film having a thickness of 27 ⁇ m and a residual solvent amount of 13% by weight was obtained.
- PET polyethylene terephthalate
- the resin film on the PET film was adhered to the glass through the adhesive to obtain a laminate.
- the laminate was heated at 90 ° C. for 4 minutes, 130 ° C. for 4 minutes, and 150 ° C. for 4 minutes.
- the PET was peeled off and further heated at 150 ° C. for 12 minutes to obtain a transparent substrate (glass (thickness 50 ⁇ m) / adhesive layer (thickness 1 ⁇ m: one side) / resin layer (thickness 27 ⁇ m: one side)).
- Example 4 A transparent substrate was prepared in the same manner as in Example 1 except that the white polymer obtained in Production Example 2 was used instead of the white polymer obtained in Production Example 1 as the thermoplastic resin (b) in the adjustment of the adhesive. Got.
- Example 5 Polypentylate (trade name “U-100”, manufactured by Unitika Ltd., glass transition temperature (Tg): 193 ° C.) cyclopentanone solution (concentration 5% by weight) in polyethylene terephthalate (PET) film (trade name, manufactured by Toray Industries, Inc.) The resin film having a thickness of 27 ⁇ m and a residual solvent amount of 13% by weight was obtained on PET. A transparent substrate was obtained in the same manner as in Example 1 except that the resin layer was formed from the resin film.
- PET polyethylene terephthalate
- PET film (trade name, manufactured by Toray Industries, Inc.) made of a cyclopentanone solution (concentration 5% by weight) of polycarbonate (manufactured by Bayer Material Science, trade name “APEC 1895”, glass transition temperature (Tg): 182 ° C.)
- the resin film having a thickness of 27 ⁇ m and a residual solvent amount of 13% by weight was obtained on PET.
- a transparent substrate was obtained in the same manner as in Example 1 except that the resin layer was formed from the resin film.
- Example 7 In adjusting the adhesive, the blending amount of 3-ethyl-3 (((3-ethyloxetane-3-yl) methoxy) methyl) oxetane (manufactured by Toagosei Co., Ltd., trade name “Aronoxetane OXT-221”) was 1 g.
- a transparent substrate was obtained in the same manner as in Example 1 except that the amount of the epoxy group terminal coupling agent (trade name “KBM403” manufactured by Shin-Etsu Chemical Co., Ltd.) was 3.5 g.
- Example 3 A transparent substrate was obtained in the same manner as in Example 1 except that the curing catalyst was not used in adjusting the adhesive.
- thermoplastic resin (b) was not used in adjusting the adhesive.
- Comparative Example 9 A transparent substrate was obtained in the same manner as in Comparative Example 9 except that an acrylic terminal coupling agent (trade name “KBM5103” manufactured by Shin-Etsu Chemical Co., Ltd.) was used as the acrylic monomer.
- an acrylic terminal coupling agent trade name “KBM5103” manufactured by Shin-Etsu Chemical Co., Ltd.
- Example 1 except that an acrylic coupling agent (trade name “KBM5103” manufactured by Shin-Etsu Chemical Co., Ltd.) was used in place of the epoxy group terminal coupling agent (trade name “KBM403” manufactured by Shin-Etsu Chemical Co., Ltd.). Similarly, a transparent substrate was obtained.
- an acrylic coupling agent trade name “KBM5103” manufactured by Shin-Etsu Chemical Co., Ltd.
- KBM403 manufactured by Shin-Etsu Chemical Co., Ltd.
- Example 1 A transparent substrate was obtained in the same manner as in Example 1 except that toluene was used instead of cyclopentanone in adjusting the adhesive. Foaming in the adhesive layer was confirmed in the obtained transparent substrate.
- the transparent substrate of the present invention can be widely used for display elements such as liquid crystal displays, organic EL displays, and plasma displays, solar cells, and illumination elements.
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Abstract
Description
好ましい実施形態においては、上記熱可塑性樹脂(b)が、上記熱可塑性樹脂(A)に対して相溶性を有する。
好ましい実施形態においては、上記熱可塑性樹脂(b)の重量平均分子量が、30×104以下である。
好ましい実施形態においては、上記熱硬化性モノマー(c)が、エポキシ基および/またはオキセタニル基を有する。
好ましい実施形態においては、上記熱硬化性モノマー(c)が、アルコキシシラン基、シリケート基および/またはシロキサン基を有する。
好ましい実施形態においては、上記硬化触媒の含有割合が、上記熱硬化性モノマー(c)100重量部に対して、1重量部~20重量部である。
好ましい実施形態においては、上記硬化触媒が、熱潜在性硬化触媒である。
好ましい実施形態においては、上記硬化触媒がイミダゾール系触媒である。
好ましい実施形態においては、本発明の接着剤は、上記熱可塑性樹脂(A)を溶解し得る溶媒をさらに含む。
好ましい実施形態においては、上記溶媒がケトン系溶媒および/または芳香族系溶媒である。
本発明の別の局面によれば、透明基板が提供される。この透明基板は、ガラスと、接着層と、熱可塑性樹脂(A)を含む樹脂層とを備え、該接着層が、上記接着剤により形成されている。
好ましい実施形態においては、本発明の透明基板のヘイズ値は10%以下である。
本発明の別の局面によれば、透明基板の製造方法が提供される。この透明基板の製造方法は、ガラス上に、上記接着剤を塗布した後、該接着剤上に、樹脂溶液(a)により形成された樹脂フィルムを貼着すること、または、該接着剤上に、該樹脂溶液(a)を塗布することを含む、透明基板の製造方法であって、該樹脂溶液(a)が熱可塑性樹脂(A)と溶媒とを含み、該接着剤に含まれる溶媒の沸点が、樹脂溶液(a)の溶媒と同等もしくはそれ以上である。
上記ガラスは、板状のものであれば、任意の適切なものが採用され得る。上記ガラスは、組成による分類によれば、例えば、ソーダ石灰ガラス、ホウ酸ガラス、アルミノ珪酸ガラス、石英ガラス等が挙げられる。また、アルカリ成分による分類によれば、無アルカリガラス、低アルカリガラスが挙げられる。上記ガラスのアルカリ金属成分(例えば、Na2O、K2O、Li2O)の含有量は、好ましくは15重量%以下であり、より好ましくは10重量%以下である。
上記熱可塑性樹脂(A)は、本発明の効果が得られる限りにおいて、任意の適切な熱可塑性樹脂が採用され得る。上記熱可塑性樹脂の具体例としては、ポリアリレート系樹脂;ポリエーテルサルホン系樹脂;ポリカーボネート系樹脂;エポキシ系樹脂;アクリル系樹脂;ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル系樹脂;ポリオレフィン系樹脂;ノルボルネン系樹脂等のシクロオレフィン系樹脂;ポリイミド系樹脂;ポリアミド系樹脂;ポリアミドイミド系樹脂;ポリサルホン系樹脂;ポリエーテルイミド系樹脂;ポリウレタン系樹脂等が挙げられる。これらの熱可塑性樹脂は、単独で、または2種以上を混合して使用することができる。
本発明の接着剤は、熱可塑性樹脂(b)、熱硬化性モノマー(c)および硬化触媒を含む。
上記熱可塑性樹脂(b)としては、芳香族系熱可塑性樹脂(b1)または脂環式系熱可塑性樹脂(b2)が用いられる。好ましくは、芳香族系熱可塑性樹脂(b1)が用いられる。芳香族系熱可塑性樹脂(b1)と脂環式系熱可塑性樹脂(b2)とを併用してもよい。このような熱可塑性樹脂(b)を用いれば、接着性および透明性に優れる接着剤を得ることができる。
上記熱硬化性モノマー(c)としては、例えば、エポキシ系モノマー、オキセタニル系モノマー、アクリル系モノマー、シリコーン系モノマー等が挙げられる。より好ましくは、オキセタニル基およびエポキシ基から選ばれる少なくとも1種の基を有する熱硬化性モノマー(c)が用いられる。このような熱硬化性モノマー(c)の具体例としては、3-グリシドキシプロピルトリメトキシシラン、2-(3、4-エポキシシクロヘキシル)エチルトリメトキシシラン、3-グリシドキシプロピルメチルジエトキシシラン、3-グリシドキシプロピルトリエトキシシラン、3-エチル-3-ヒドロキシメチルオキセタン(オキセタンアルコール)、2-エチルヘキシシルオキセタン、キシリレンビスオキセタン等が挙げられる。
上記硬化触媒は、好ましくは熱潜在性を有する。また、硬化触媒は、150℃以下の温度で硬化反応を開始させ得ることが好ましい。硬化触媒としては、例えば、イミダゾール系触媒、BF3・OEt3のようなルイス酸系触媒、アルミニウム錯体系触媒、トリフェニルホスフィン系触媒、トリアリールスルホニウム塩系触媒等が挙げられる。中でも好ましくは、イミダゾール系触媒である。イミダゾール系触媒を用いれば、イミダゾール系触媒の適度な活性化温度により、硬化性モノマーの硬化反応速度と、熱可塑性樹脂(A)と接着剤との相溶速度を合わせることができ、接着剤成分と被着体成分とを強固に接着させることができる。
上記接着剤は、溶媒をさらに含んでいてもよい。溶媒としては、樹脂層(被着体)中の熱可塑性樹脂(A)を溶解し得る溶媒が好ましい。このような溶媒であれば、接着剤が樹脂層(被着体)に浸透して、強固な接着力を示す。このような溶媒として、芳香族系溶媒またはケトン系溶媒が好ましく用いられる。芳香族系溶媒とケトン系溶媒とは併用してもよい。ケトン系溶媒の具体例としては、メチルエチルケトン、メチルイソブチルケトン、シクロペンタノン、シクロヘキサノン等が挙げられる。芳香族系溶媒の具体例としては、キシレン、トルエン、ベンゼン、フェノール等が挙げられる。また、上記溶媒は、芳香族系溶媒および/またはケトン系溶媒と、その他の溶媒との混合溶媒であってもよい。
本発明の接着剤は、接着性、耐熱性および透明性に優れることから、例えば、表示素子用の透明基板に好適に用いられ得る。図1は、本発明の好ましい実施形態による透明基板の概略断面図である。この透明基板100は、ガラス10と、ガラス10の片側または両側(好ましくは、図示例のように両側)に、接着層20、20´を介して配置された樹脂層30、30´とを備える。図示しないが、上記透明基板は、必要に応じて、上記樹脂層の上記無機ガラスとは反対側に、任意の適切なその他の層を備え得る。上記その他の層としては、例えば、透明導電性層、ハードコート層等が挙げられる。本発明の接着剤は、上記のように接着剤自体が透明性に優れるほか、被着体の透明性への影響を抑え得るので、本発明の接着剤を用いれば、透明性に優れる透明基板を得ることができる。
攪拌装置を備えた反応容器中、4,4’-(1,3-ジメチルブチリデン)ビス(2,6-ジメチルフェノール)3.88g(0.012mol)、4,4’-(ジフェニルメチレン)ビスフェノール4.18g(0.012mol)、4,4’-(1-フェニルエチリデン)ビスフェノール5.17g(0.018mol)、ビスフェノールA4.07g(0.018mol)、ベンジルトリエチルアンモニウムクロライド0.384gを1M水酸化ナトリウム溶液160gに溶解させた。この溶液に、テレフタル酸クロライド12.05g(0.059mol)をクロロホルム181gに溶解させた溶液を攪拌しながら一度に加え、室温で120分間攪拌した。その後、重合溶液を静置分離してポリマーを含んだクロロホルム溶液を分離し、ついで酢酸水で洗浄し、イオン交換水で洗浄した後、メタノールに投入してポリマーを析出させた。析出したポリマーを濾過し、減圧下で乾燥することで、白色のポリマー23gを得た。得られたポリマーのガラス転移温度(Tg)は260℃であり、重量平均分子量は6×104であった。
攪拌装置を備えた反応容器中、4,4’-(1,3-ジメチルブチリデン)ビス(2,6-ジメチルフェノール)3.88g(0.012mol)、4,4’-(ジフェニルメチレン)ビスフェノール4.18g(0.012mol)、4,4’-(1-フェニルエチリデン)ビスフェノール5.17g(0.018mol)、ビスフェノールA4.07g(0.018mol)、p-t-ブチルフェノール0.092g、ベンジルトリエチルアンモニウムクロライド0.384gを1M水酸化ナトリウム溶液160gに溶解させた。この溶液に、テレフタル酸クロライド12.05g(0.059mol)を181gのクロロホルムに溶解させた溶液を攪拌しながら加え、室温で120分間攪拌した。その後、重合溶液を静置分離してポリマーを含んだクロロホルム溶液を分離し、ついで酢酸水で洗浄し、イオン交換水で洗浄した後、メタノールに投入してポリマーを析出させた。析出したポリマーを濾過し、減圧下で乾燥することで、白色のポリマー23gを得た。該ポリマーのTgは260℃であり、重量平均分子量は5×104であった。
攪拌装置を備えた反応容器中、4,4’-(1-メチル-エチリデン)ビス(2-シクロヘキシルフェノール)16.1g(0.041mol)、ビスフェノールA6.25g(0.027mol)、ベンジルトリエチルアンモニウムクロライド0.496g、p-t-ブチルフェノール0.074gを1M水酸化ナトリウム溶液307gに溶解させた。この溶液に、テレフタル酸クロライド11.1g(0.055mol)およびイソフタル酸クロライド2.78g(0.014mol)をクロロホルム208gに溶解させた溶液を攪拌しながら一度に加え、室温で120分間攪拌した。その後、重合溶液を静置分離してポリマーを含んだクロロホルム溶液を分離し、ついで酢酸水で洗浄し、イオン交換水で洗浄した後、メタノールに投入してポリマーを析出させた。析出したポリマーを濾過し、減圧下で乾燥することで、白色のポリマー30gを得た。得られたポリマーのガラス転移温度(Tg)は177℃であり、重量平均分子量は8×104であった。
攪拌装置を備えた反応容器中、4,4’-(1,3-ジメチルブチリデン)ビスフェノール7.65g(0.028mol)、4,4’-(1-フェニルエチリデン)ビスフェノール12.35g(0.043mol)、ベンジルトリエチルアンモニウムクロライド0.444g、p-t-ブチルフェノール0.022gを1M水酸化ナトリウム溶液185gに溶解させた。この溶液に、テレフタル酸クロライド14.4g(0.071mol)をクロロホルム246gに溶解させた溶液を攪拌しながら一度に加え、室温で120分間攪拌した。その後、重合溶液を静置分離してポリマーを含んだクロロホルム溶液を分離し、ついで酢酸水で洗浄し、イオン交換水で洗浄した後、メタノールに投入してポリマーを析出させた。析出したポリマーを濾過し、減圧下で乾燥することで、白色のポリマー27gを得た。得られたポリマーのガラス転移温度(Tg)は275℃であり、重量平均分子量は20×104であった。
(接着剤の調整)
熱可塑性樹脂(b)としての製造例1で得られた白色ポリマー10gと、熱硬化性モノマー(c)としての3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亜合成社製、商品名「アロンオキセタン OXT-221」)0.6gおよびエポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)2.5gと、硬化触媒としての1,2-ジメチルイミダゾール0.4gおよびジブチル錫ジラウリレート0.05gとを、シクロペンタノン30gに溶解させ、接着剤を得た。
(ガラス)
厚み50μm、縦10cm×横4cmのガラスの片面表面をメチルエチルケトンで洗浄後、コロナ処理を行い、続けてエポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)でカップリング処理を行った。同様の処理をガラスのもう一方の表面にも行った。
(樹脂フィルム(樹脂層))
製造例4で得られた白色ポリマーのシクロペンタノン溶液(濃度9重量%)をポリエチレンテレフタレート(PET)フィルム(東レ社製、商品名「ルミラー」)上に塗工して、PETフィルム上に、厚み27μm、残存溶媒量13重量%の樹脂フィルムを得た。
(透明基板の製造)
上記ガラスに、上記接着剤を介して、上記PETフィルム上の樹脂フィルムを貼着して積層体を得た。この積層体を、90℃で4分間、130℃で4分間、150℃で4分間、加熱した。次いで、PETを剥離し、さらに150℃で12分間加熱して、透明基板(ガラス(厚み50μm)/接着層(厚み1μm:片側)/樹脂層(厚み27μm:片側))を得た。
接着剤の調整において、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亜合成社製、商品名「アロンオキセタン OXT-221」)の配合量を0.8gとし、エポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)の配合量を3gとした以外は、実施例1と同様にして透明基板を得た。
(接着剤の調整)
熱可塑性樹脂(b)として、ポリアリレート(ユニチカ社製、商品名「M-4000」、重量平均分子量:5×104)10gのシクロペンタノン溶液(濃度21重量%)に、熱硬化性モノマー(c)としての3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亜合成社製、商品名「アロンオキセタン OXT-221」)0.3gおよびエポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)2.0gと、硬化触媒としての1,2-ジメチルイミダゾール0.15gおよびジブチル錫ジラウリレート0.2gを混合し接着剤を得た。
(ガラス)
厚み50μm、縦10cm×横4cmのガラスの片面表面をメチルエチルケトンで洗浄後、コロナ処理を行い、続けてエポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)でカップリング処理を行った。同様の処理をガラスのもう一方の表面にも行った。
(樹脂フィルム(樹脂層))
製造例4で得られた白色ポリマーのシクロペンタノン溶液(濃度9重量%)をポリエチレンテレフタレート(PET)フィルム(東レ社製、商品名「ルミラー」)上に塗工して、PET上に、厚み27μm、残存溶媒量13重量%の樹脂フィルムを得た。
(透明基板の製造)
上記ガラスに、上記接着剤を介して、上記PETフィルム上の樹脂フィルムを貼着して積層体を得た。この積層体を、90℃で4分間、130℃で4分間、150℃で4分間、加熱した。次いで、PETを剥離し、さらに150℃で12分間加熱して、透明基板(ガラス(厚み50μm)/接着層(厚み1μm:片側)/樹脂層(厚み27μm:片側))を得た。
接着剤の調整において、熱可塑性樹脂(b)として、製造例1で得られた白色ポリマーに代えて製造例2で得られた白色ポリマーを用いた以外は、実施例1と同様にして透明基板を得た。
ポリアリレート(ユニチカ社製、商品名「U-100」、ガラス転移温度(Tg):193℃)のシクロペンタノン溶液(濃度5重量%)をポリエチレンテレフタレート(PET)フィルム(東レ社製、商品名「ルミラー」)上に塗工して、PET上に、厚み27μm、残存溶媒量13重量%の樹脂フィルムを得た。
該樹脂フィルムにより樹脂層を形成した以外は、実施例1と同様にして透明基板を得た。
ポリカーボネート(Bayer Material Science社製、商品名「APEC 1895」、ガラス転移温度(Tg):182℃)のシクロペンタノン溶液(濃度5重量%)をポリエチレンテレフタレート(PET)フィルム(東レ社製、商品名「ルミラー」)上に塗工して、PET上に、厚み27μm、残存溶媒量13重量%の樹脂フィルムを得た。
該樹脂フィルムにより樹脂層を形成した以外は、実施例1と同様にして透明基板を得た。
接着剤の調整において、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亜合成社製、商品名「アロンオキセタン OXT-221」)の配合量を1gとし、エポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)の配合量を3.5gとした以外は、実施例1と同様にして透明基板を得た。
接着剤の調整において、熱可塑性樹脂(b)として、製造例1で得られた白色ポリマーに代えて製造例3で得られた白色ポリマーを用いた以外は、実施例1と同様にして透明基板を得た。
樹脂フィルム(樹脂層)の製造において、製造例4で得られた白色ポリマーに代えて、製造例3で得られた白色ポリマーを用いた以外は、実施例1と同様にして透明基板を得た。
接着剤の調整において、硬化触媒を用いなかった以外は、実施例1と同様にして透明基板を得た。
接着剤の調整において、エポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)に代えて、シリコーン樹脂(アデカ社製、商品名「FX-V5707」)を用いた以外は、実施例1と同様にして透明基板を得た。熱可塑性樹脂(b)(製造例1で得られた白色ポリマー)は、当該シリコーン樹脂に対して相溶性を有していなかった。
接着剤の調整において、熱可塑性樹脂(b)として、製造例1で得られた白色ポリマーに代えて、フマル酸ジイソプロピル重合体を用いた以外は、実施例1と同様にして透明基板を得た。
接着剤の調整において、熱硬化性モノマー(c)および硬化触媒を用いなかった以外は、実施例1と同様にして透明基板を得た。
接着剤の調整において、熱可塑性樹脂(b)を用いなかった以外は、実施例1と同様にして透明基板を得た。
接着剤の調整において、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亜合成社製、商品名「アロンオキセタン OXT-221」)0.6gおよびエポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)2.5gに代えて、アクリル系モノマー(日立化成社製、商品名「ファンクリルFA-513M」)3gを用いた以外は、実施例1と同様にして透明基板を得た。
熱可塑性樹脂(b)(製造例1で得られた白色ポリマー)は、当該アクリル系モノマーに対して相溶性を有していなかった。また、当該アクリル系モノマーはガラス表面のエポキシカップリング剤との反応性を有していなかった。
アクリル系モノマーとして、アクリル末端カップリング剤(信越化学工業社製、商品名「KBM5103」)を用いた以外は、比較例9と同様にして透明基板を得た。
接着剤の調整において、3-エチル-3(((3-エチルオキセタン-3-イル)メトキシ)メチル)オキセタン(東亜合成社製、商品名「アロンオキセタン OXT-221」)0.6gおよびエポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)2.5gに代えてアクリル末端カップリング剤(信越化学工業社製、商品名「KBM5103」)を用い、ガラスのカップリング処理において、エポキシ基末端カップリング剤(信越化学工業社製、商品名「KBM403」)に代えてアクリルカップリング剤(信越化学工業社製、商品名「KBM5103」)を用いた以外は、実施例1と同様に透明基板を得た。
接着剤の調整において、シクロペンタノンに代えてトルエンを用いた以外は、実施例1と同様にして透明基板を得た。得られた透明基板は、接着剤層中での発泡が確認された。
上記で得られた透明基板を下記の方法で評価した。結果を表1に示す。
(1)接着性試験
JIS K 5400の碁盤目剥離試験により評価した。すなわち、得られた透明基板の片面最外層の表面上10mm角中に1mm間隔にカッターで切れ目を入れ、100個の碁盤目を作り、粘着テープをその上に貼り付けた後、剥離し、ガラスから剥離した樹脂層の碁盤目の数により密着性を評価した。表1中、剥離した碁盤目の数が0の場合を◎、1~20の場合を○、20より多い場合を×とした。
(2)透明性
得られた透明基板の透明性を目視で確認した。
(3)耐熱性
得られた透明基板に、長さ5mmのクラックをいれた。クラックの入った透明基板を、直径6インチの円筒体に巻き付けて、200℃下で1時間放置した。このとき、クラックの方向は円筒体の長さ方向とした。1時間放置後のクラックの進展を目視で確認した。表1中、クラックが進展していない場合を○、進展している場合を×とした。
20、20´ 接着層
30、30´ 樹脂層
100 透明基板
Claims (13)
- 被着体が、ガラスおよび/または熱可塑性樹脂(A)を含む樹脂層である接着剤であって、
熱可塑性樹脂(b)、熱硬化性モノマー(c)および硬化触媒を含み、
該熱可塑性樹脂(b)として、ガラス転移温度(Tg)が200℃を越える芳香族系熱可塑性樹脂(b1)および/またはガラス転移温度(Tg)が200℃を越える脂環式系熱可塑性樹脂(b2)を含み、
該熱硬化性モノマー(c)が、該熱可塑性樹脂(b)に対して相溶性を有し、
該熱硬化性モノマー(c)の含有割合が、該熱可塑性樹脂(b)100重量部に対して、5重量部~50重量部である、
接着剤。 - 前記熱可塑性樹脂(b)が、前記熱可塑性樹脂(A)に対して相溶性を有する、請求項1に記載の接着剤。
- 前記熱可塑性樹脂(b)の重量平均分子量が、18×104以下である、請求項1または2に記載の接着剤。
- 前記熱硬化性モノマー(c)が、エポキシ基および/またはオキセタニル基を有する、請求項1から3のいずれかに記載の接着剤。
- 前記熱硬化性モノマー(c)が、アルコキシシラン基、シリケート基および/またはシロキサン基を有する、請求項1から4のいずれかに記載の接着剤。
- 前記硬化触媒の含有割合が、前記熱硬化性モノマー(c)100重量部に対して、1重量部~30重量部である、請求項1から5のいずれかに記載の接着剤。
- 前記硬化触媒が、熱潜在性硬化触媒である、請求項1から6のいずれかに記載の接着剤。
- 前記硬化触媒がイミダゾール系触媒である、請求項7に記載の接着剤。
- 前記熱可塑性樹脂(A)を溶解し得る溶媒をさらに含む、請求項1から8のいずれかに記載の接着剤。
- 前記溶媒がケトン系溶媒および/または芳香族系溶媒である、請求項9に記載の接着剤。
- ガラスと、接着層と、熱可塑性樹脂(A)を含む樹脂層とを備え、
該接着層が、請求項1から10のいずれかに記載の接着剤により形成されている、透明基板。 - ヘイズ値が、10%以下である、請求項11に記載の透明基板。
- ガラス上に、請求項9または10に記載の接着剤を塗布した後、
該接着剤上に、樹脂溶液(a)により形成された樹脂フィルムを貼着すること、または、該接着剤上に、該樹脂溶液(a)を塗布することを含む、透明基板の製造方法であって、
該樹脂溶液(a)が、熱可塑性樹脂(A)と溶媒とを含み、
該接着剤に含まれる溶媒の沸点が、樹脂溶液(a)の溶媒の沸点と同等もしくはそれ以上である、
透明基板の製造方法。
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EP13798209.6A EP2857474A4 (en) | 2012-05-29 | 2013-05-28 | ADHESIVE AND TRANSPARENT SUBSTRATE THEREWITH |
CN201380028098.5A CN104350121A (zh) | 2012-05-29 | 2013-05-28 | 粘合剂和使用所述粘合剂的透明基板 |
KR1020147033453A KR20150027067A (ko) | 2012-05-29 | 2013-05-28 | 접착제 및 그것을 사용한 투명 기판 |
US14/400,441 US20150140343A1 (en) | 2012-05-29 | 2013-05-28 | Adhesive, and transparent substrate using same |
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WO2014059058A1 (en) | 2012-10-09 | 2014-04-17 | Avery Dennison Corporation | Adhesives and related methods |
KR101996828B1 (ko) | 2015-02-05 | 2019-07-05 | 애버리 데니슨 코포레이션 | 가혹한 환경을 위한 라벨 어셈블리 |
CN111925741B (zh) * | 2016-10-28 | 2021-11-09 | 苏州太湖电工新材料股份有限公司 | 一种单面玻璃布补强少胶云母带及线棒 |
US10526511B2 (en) | 2016-12-22 | 2020-01-07 | Avery Dennison Corporation | Convertible pressure sensitive adhesives comprising urethane (meth)acrylate oligomers |
CN110484129B (zh) * | 2019-07-02 | 2022-01-25 | 昆山联滔电子有限公司 | 带有防护涂层的产品及其制备方法 |
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