WO2020032287A1 - 感圧接着層形成性オルガノポリシロキサン組成物およびその使用 - Google Patents
感圧接着層形成性オルガノポリシロキサン組成物およびその使用 Download PDFInfo
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- WO2020032287A1 WO2020032287A1 PCT/JP2019/031810 JP2019031810W WO2020032287A1 WO 2020032287 A1 WO2020032287 A1 WO 2020032287A1 JP 2019031810 W JP2019031810 W JP 2019031810W WO 2020032287 A1 WO2020032287 A1 WO 2020032287A1
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- sensitive adhesive
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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
- C09J7/38—Pressure-sensitive adhesives [PSA]
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/06—Preparatory processes
- C08G77/08—Preparatory processes characterised by the catalysts used
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/12—Polysiloxanes containing silicon bound to hydrogen
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/16—Polysiloxanes containing silicon bound to oxygen-containing groups to hydroxy groups
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/14—Polysiloxanes containing silicon bound to oxygen-containing groups
- C08G77/18—Polysiloxanes containing silicon bound to oxygen-containing groups to alkoxy or aryloxy groups
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/80—Siloxanes having aromatic substituents, e.g. phenyl side groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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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
- C09J183/00—Adhesives based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Adhesives based on derivatives of such polymers
- C09J183/04—Polysiloxanes
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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
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
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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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
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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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
- C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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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
- C09J2483/00—Presence of polysiloxane
Definitions
- the present invention relates to a curing reactive organopolysiloxane composition for forming a pressure-sensitive adhesive layer.
- the present invention has practically sufficient curability and adhesion, and designs the elastic modulus in a wide range where the shear storage modulus G ′ is 0.77 or more in a wide temperature range including a low temperature.
- a curing reactive organopolysiloxane composition also relates to a pressure-sensitive adhesive composition using the composition, a laminate using the composition, an electronic component, a display device (including a flexible display and a touch panel), and the like.
- Polysiloxane-based pressure-sensitive adhesive compositions have better electrical insulation, heat resistance, cold resistance, and adhesion to various adherends than acrylic or rubber-based pressure-sensitive adhesive compositions. It is used as a conductive adhesive tape, an electrically insulating adhesive tape, a heat seal tape, a plating masking tape, and the like. These polysiloxane-based pressure-sensitive adhesive compositions are classified into an addition-curable type, a condensation-curable type, and a peroxide-curable type, depending on the curing mechanism. An addition-reaction-curable pressure-sensitive adhesive composition is widely used because it is quickly cured by leaving at room temperature or heating and does not generate by-products.
- Such a device has a structure in which a film composed of a plurality of layers including an electrode layer and a display layer is sandwiched between transparent substrates, and is intended to protect the electrode layer and the display layer and to improve adhesion between the layers. It is expected that a polysiloxane-based pressure-sensitive adhesive having excellent heat and cold resistance will work effectively.
- the degree of freedom in designing the storage elastic modulus (for example, the shear storage elastic modulus G ′) is high, and the curability is excellent.
- the pressure-sensitive adhesive compositions described in known literatures and the like do not sufficiently satisfy these properties, and are still in use. , Leaving room for improvement.
- Patent Document 1 discloses an adhesive rubber sheet.
- the content of the resin component is low in the ratio of the resin component and the siloxane polymer component, and the resin sheet has specific properties such as a molecular weight and a hydroxyl group content. No use or combination of resin components is described or suggested.
- the pressure-sensitive adhesive rubber sheet uses fine powder silica or the like, and does not satisfy the storage elastic modulus (G ') aimed at by the present invention.
- Patent Document 2 discloses a silicone pressure-sensitive adhesive using an organopolysiloxane resin having a number average molecular weight of 950 to 1600.
- the pressure-sensitive adhesives differ in molecular weight and have specific properties such as a hydroxyl group content. There is no description or suggestion of using a resin component having the following in combination.
- the silicone pressure-sensitive adhesive has a certain adhesive strength, but does not satisfy the storage elastic modulus (G ') aimed at by the present invention.
- Patent Document 3 discloses a transparent resin characterized in that the substance ratio of the resin component to the polymer component is in the range of 0.5 to 1.0, and the difference in storage modulus G ′ between low temperature and room temperature is small. Laminates having an adhesive layer have been proposed. However, the transparent resin adhesive layer only discloses a condensation-reactive one, and there is a problem that the curing reaction is too slow for industrial use. Furthermore, the transparent resin adhesive layer does not satisfy the storage elastic modulus (G ') aimed at by the present invention and the practically sufficient adhesive strength.
- G ' storage elastic modulus
- Patent Document 4 a curable silicone composition capable of forming a cured layer having a sufficient elastic modulus and a loss coefficient (tan ⁇ ) for use in a flexible laminate.
- compositions specifically disclosed in the Examples and the like partially disclose combinations of resin components having different weight average molecular weights, they do not sufficiently solve the problems of the present invention. .
- the present invention has been made in order to solve the above-described problems, and has a high degree of freedom in designing storage elastic modulus (G ′), and has excellent curability, and a pressure-sensitive adhesive layer having practically sufficient adhesive strength. It is an object to provide a cure-reactive organopolysiloxane composition to be formed. Further, the present invention provides the use of the curing-reactive organopolysiloxane composition or the cured product thereof as a pressure-sensitive adhesive layer, as an elastic pressure-sensitive adhesive member in a wide range of applications, and an apparatus or an apparatus provided with the same. The purpose is to do.
- an object of the present invention is to provide a pressure-sensitive adhesive layer-forming organopolysiloxane composition curable by hydrosilylation reaction in which the sum of the content of hydroxyl groups and hydrolyzable groups to all silicon atoms in the molecule is 9%.
- organopolysiloxane resins having different molecular weight ranges are used in combination, the mass ratio of the organopolysiloxane resin to the chain organopolysiloxane is adjusted to a range of 0.9 to 3.0, and And a pressure-sensitive adhesive layer-forming organopolysiloxane composition having a shear storage modulus G ′ at ⁇ 20 ° C. of 0.77 to 50.00 MPa in the pressure-sensitive adhesive layer obtained by curing the composition.
- the object is to use the curing-reactive organopolysiloxane composition or a cured product thereof as a pressure-sensitive adhesive layer, as an electronic material or a member for a display device, and an electronic component or display device provided with the same.
- the present invention "[1] (A) a chain organopolysiloxane having an average of more than one alkenyl group in the molecule, (B) An organopolysiloxane resin mixture containing the following components (b1) and (b2) in a mass ratio of 1:99 to 99: 1: (B1) The sum of the content of the hydroxyl group and the hydrolyzable group with respect to all silicon atoms in the molecule is 9 mol% or less, and the weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) in terms of standard polystyrene.
- Mw weight average molecular weight
- the sum of the content of the hydroxyl group and the hydrolyzable group to all silicon atoms in the molecule is 9 mol% or less, and the weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) in terms of standard polystyrene.
- component (C) an organohydrogenpolysiloxane having at least two Si-H bonds in the molecule, and (D) an effective amount of a hydrosilylation reaction catalyst,
- the mass ratio of component (B) to component A) is in the range of 0.9 to 3.0, and the pressure-sensitive adhesive layer obtained by curing the composition has a shear storage modulus G ′ at ⁇ 20 ° C. of 0.1.
- Pressure-sensitive adhesive layer-forming organopolysiloxane composition in the range of 77 to 50.00 MPa [2] A thickness of 50 ⁇ m obtained by curing the composition.
- the content of the vinyl (CH 2 ⁇ CH) moiety in the alkenyl group is in the range of 0.005 to 0.400% by mass.
- Siloxane When the organopolysiloxane resin mixture as the component (B) is an R 3 SiO 1/2 unit (wherein R is a monovalent organic group, 90 mol% or more of R is an alkyl group having 1 to 6 carbon atoms or phenyl).
- R is a monovalent organic group, 90 mol% or more of R is an alkyl group having 1 to 6 carbon atoms or phenyl).
- a mixture of organopolysiloxane resins consisting essentially of M; units) and SiO 4/2 units (Q units), wherein the amount of component (C) is in component (A) and component (B).
- the ratio (molar ratio) of the amount of the SiH groups in the component (C) to the sum of the amounts of the alkenyl groups of (a) is from 0.1 to 100
- the ratio of the amount of the SiH group in the component (C) to the sum of the amount of the alkenyl group in the component (A) and the amount of the alkenyl group in the component (B) (molar ratio)
- a pressure-sensitive adhesive layer obtained by curing the pressure-sensitive adhesive layer-forming organopolysiloxane composition according to any one of the adhesive layer-forming organopolysiloxane compositions [6], [1] to [5].
- a release layer for the pressure-sensitive adhesive layer is provided on one or more film-like substrates.
- An elastic adhesive member obtained by curing the pressure-sensitive adhesive layer-forming organopolysiloxane composition according to any one of [1] to [5].
- the pressure-sensitive adhesive layer-forming organopolysiloxane composition of the present invention has excellent curability by a hydrosilylation reaction, cures, has a practically sufficient adhesive force, and has a storage elastic modulus (G ′) design. It has a high degree of freedom and can design the elastic modulus in a wide range where the shear storage elastic modulus G ′ at ⁇ 20 ° C. is 0.77 or more, and can form a pressure-sensitive adhesive layer having practically sufficient adhesiveness. it can.
- the curing-reactive organopolysiloxane composition or a cured product thereof can be suitably used as a pressure-sensitive adhesive layer, an electronic material, or a member for a display device, and an electric / electronic component or a display device including them.
- the base material for electronic components and the like can be used in the temperature range from low temperature to room temperature because the adhesive layer in the wide temperature range including low temperature has sufficient stiffness to satisfy the above-mentioned required properties and the problem of poor curing. Since it is possible to form a pressure-sensitive adhesive layer that does not easily cause the problem of poor adhesion, there is an advantage that industrialization is easy and improvement in the performance of the obtained laminate such as a display device is expected.
- the composition is rapidly cured by a curing reaction including a hydrosilylation reaction, has a high degree of freedom in designing storage elastic modulus (G ′), and has a wide range of shear storage elastic modulus G ′ at ⁇ 20 ° C. of 0.77 or more.
- the elastic modulus can be designed in the region, and a pressure-sensitive adhesive layer having a practically sufficient adhesive strength is formed.
- the components, the range of the organopolysiloxane resin mixture which is a technical feature, the mass ratio of the organopolysiloxane resin to the chain organopolysiloxane, and the characteristics of the pressure-sensitive adhesive layer will be described below.
- the organopolysiloxane composition of the present invention cures by a hydrosilylation reaction to form a pressure-sensitive adhesive layer having a certain adhesive strength, and in the composition, a hydroxyl group to all silicon atoms in the molecule is used.
- the range of resin formulation is in a specific range.
- the pressure-sensitive adhesive layer obtained by curing the composition having the above characteristics has a shear storage modulus G ′ at ⁇ 20 ° C. in the range of 0.77 to 50.00 MPa, and preferably further has a constant adhesive strength. It has.
- the organopolysiloxane composition of the present invention comprises: (A) a chain organopolysiloxane having an average of more than one alkenyl group in the molecule; (B) An organopolysiloxane resin mixture containing the following components (b1) and (b2) in a mass ratio of 1:99 to 99: 1: (B1)
- the sum of the content of the hydroxyl group and the hydrolyzable group with respect to all silicon atoms in the molecule is 9 mol% or less, and the weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) in terms of standard polystyrene.
- Mw weight average molecular weight measured by gel permeation chromatography (GPC) in terms of standard polystyrene.
- Is less than 4500 comprising (C) an organohydrogenpolysiloxane having at least two Si-H bonds in the molecule, and (D) an effective amount of a hydrosilylation reaction catalyst.
- composition contains a hydrosilylation reaction catalyst, it may further contain (E) a curing retarder from the viewpoint of handling operability, and other additives may be added within a range not inconsistent with the object of the present invention. It may contain an agent.
- a curing retarder from the viewpoint of handling operability, and other additives may be added within a range not inconsistent with the object of the present invention. It may contain an agent.
- the alkenyl group-containing organopolysiloxane of the component (A) is a linear polysiloxane molecule, which is the main component (base polymer) of the composition, and is bonded to an average of more than one silicon atom in one molecule.
- the preferred number of alkenyl groups is 1.5 or more per molecule.
- the alkenyl group of the organopolysiloxane of the component (A) includes, for example, an alkenyl group having 2 to 10 carbon atoms such as a vinyl group, an allyl group, a butenyl group, a pentenyl group, a hexenyl group and a heptenyl group.
- the component (A) is preferably a hexenyl group.
- Examples of the bonding position of the alkenyl group of the component (A) include a molecular chain terminal and / or a molecular chain side chain.
- the component (A) may include only a single component, or may be a mixture of two or more different components.
- examples of the organic group bonded to a silicon atom other than the alkenyl group include an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, and a heptyl group.
- Aryl groups such as phenyl, tolyl, xylyl, and naphthyl; aralkyl groups such as benzyl and phenethyl; halogens such as chloromethyl, 3-chloropropyl, 3,3,3-trifluoropropyl And a methyl group and a phenyl group are particularly preferable.
- the component (A) differs from the component (B) in that it has a chain-like polysiloxane molecular structure.
- the component (A) is preferably a straight-chain, partially branched straight-chain (branched-chain), and may partially include a cyclic or three-dimensional network.
- the main chain is a linear or branched diorganopolysiloxane in which the main chain is composed of repeating diorganosiloxane units, and both ends of the molecular chain are blocked with a triorganosiloxy group.
- the siloxane unit that gives the branched organopolysiloxane is a T unit or a Q unit described below.
- the property of the component (A) at room temperature may be oily or raw rubber, and the viscosity of the component (A) at 25 ° C is preferably 50 mPa ⁇ s or more, particularly preferably 100 mPa ⁇ s or more.
- the organopolysiloxane composition according to the present invention is of a solvent type, at least a part of the component (A) has (A1) a viscosity of 100,000 mPa ⁇ s or more at 25 ° C. or JIS K6249.
- Plasticity measured according to the method specified in (1) A load of 1 kgf applied to a 4.2 g spherical sample for 3 minutes at 25 ° C is read to 1/100 mm, and this figure is multiplied by 100. ) Is preferably in the range of 50 to 200, more preferably in the range of 80 to 180, a raw rubber-like organopolysiloxane containing an alkenyl group.
- alkenyl-containing organopolysiloxanes reduce or remove volatile or low-molecular-weight siloxane oligomers (octamethyltetrasiloxane (D4), decamethylpentasiloxane (D5), etc.) from the viewpoint of preventing contact failure. It is preferred that Although the degree can be designed as desired, it may be less than 1% by mass of the whole component (A) and less than 0.1% by mass for each siloxane oligomer, and may be reduced to near the detection limit as necessary.
- the content of the alkenyl group in the component (A1) is not particularly limited, but from the viewpoint of the technical effect of the present invention, vinyl (CH 2 CHCH) in the alkenyl group in the component (A1) is used.
- the content of the portion (hereinafter referred to as "vinyl content") is preferably in the range of 0.005 to 0.400% by mass, and particularly preferably in the range of 0.005 to 0.300% by mass.
- a component (A) having a lower viscosity than the component (A1) can be used.
- (A2) the viscosity at 25 ° C. of 100,000 mPa ⁇ Organopolysiloxanes containing less than s alkenyl groups are available.
- examples other than the viscosity of the component (A2) are the same as those of the component (A1).
- the organopolysiloxane resin mixture is one of the characteristic constitutions of the present invention, and is a tackifying component for imparting adhesive strength to a substrate, and is used at a certain ratio with the (A) component. By doing so, it is a component that achieves the storage elastic modulus at low temperatures and the practical range of adhesive strength, which are the objects of the present invention. More specifically, the component (B) is a mixture of organopolysiloxane resins having different average molecular weights in which the content of a hydroxyl group or a hydrolyzable group is suppressed, and hydrolysis / polymerization between the components (B). By using a resin in which a reaction hardly occurs and having different average molecular weights in combination, a predetermined storage elastic modulus and a practical range of adhesive strength in the pressure-sensitive adhesive layer which is a cured product thereof are realized.
- the component (B) is an organopolysiloxane resin mixture containing the following components (b1) and (b2) in a mass ratio of 1:99 to 99: 1.
- (B1) The sum of the content of the hydroxyl group and the hydrolyzable group with respect to all silicon atoms in the molecule is 9 mol% or less, and the weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) in terms of standard polystyrene.
- the sum of the content of the hydroxyl group and the hydrolyzable group to all silicon atoms in the molecule is 9 mol% or less, and the weight average molecular weight (Mw) measured by gel permeation chromatography (GPC) in terms of standard polystyrene.
- Mw weight average molecular weight measured by gel permeation chromatography
- the component (B) in the present invention that is, the component (b1) and the component (b2) have a common property that the sum of the content of the hydroxyl group and the hydrolyzable group in the molecule is determined by the sum of the content in the organopolysiloxane resin molecule. Is preferably in the range of 9 mol% or less based on all silicon atoms, and is preferably 7 mol% or less based on all silicon atoms in the molecule.
- the content of the hydroxyl group and the hydrolyzable group can be expressed by converting all of these functional groups into hydroxyl groups.
- a hydroxyl group or a hydrolyzable group is directly bonded to silicon such as a T unit or a Q unit in a siloxane unit in a resin structure described later, and is derived from silane as a raw material or a group formed as a result of hydrolysis of silane. Therefore, by hydrolyzing the synthesized organopolysiloxane resin with a silylating agent such as trimethylsilane, the content of hydroxyl groups or hydrolyzable groups can be reduced.
- the condensation reaction between the organopolysiloxane resin molecules proceeds, and the organopolysiloxane having a large molecular weight in the cured product.
- a polysiloxane resin structure is easily formed.
- Such a high molecular weight organopolysiloxane resin tends to impair the curability of the entire composition, and the curability of the composition at a low temperature becomes insufficient, or the obtained pressure-sensitive adhesive layer is practically sufficient. It may have no storage modulus.
- the component (b1) and the component (b2) are both organopolysiloxane resins, and are organopolysiloxanes having a three-dimensional structure.
- it is composed of R 2 SiO 2/2 unit (D unit) and RSiO 3/2 unit (T unit) (where R represents a monovalent organic group independent of each other), and contains a hydroxyl group or a hydrolyzable group.
- Resin whose amount is in the above range, resin consisting of T units alone, and whose hydroxyl group or hydrolyzable group content is in the above range, and R 3 SiO 1/2 units (M units) and SiO 4/2 units (Q And a resin having a hydroxyl or hydrolyzable group content within the above range.
- M unit R 3 SiO 1/2 unit
- SiO 4/2 unit Q unit
- the sum of the content of the hydroxyl group and the hydrolyzable group with respect to all silicon atoms in the molecule is 0 to 7 mol%.
- a resin also referred to as MQ resin
- MQ resin a resin in the range (preferably 0.0 to 1.6% by mass when all of these functional groups are converted to hydroxyl groups).
- the monovalent organic group for R is preferably a monovalent hydrocarbon group having 1 to 10 carbon atoms, such as an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, and an aryl group having 6 to 10 carbon atoms. And a cycloalkyl group having 6 to 10 carbon atoms, a benzyl group, a phenylethyl group, and a phenylpropyl group.
- it is preferable that 90 mol% or more of R is an alkyl group or a phenyl group having 1 to 6 carbon atoms, and it is particularly preferable that 95 to 100 mol% of R is a methyl group or a phenyl group.
- the molar ratio of M unit to Q unit is 0. It is preferably from 0.5 to 2.0. When the molar ratio is less than 0.5, the adhesive strength to the substrate may decrease, and when the molar ratio is greater than 2.0, the cohesive force of the substance constituting the adhesive layer decreases. In addition, it is also possible to include a D unit and a T unit in the component (B) as long as the properties of the present invention are not impaired. Furthermore, in these organopolysiloxane resins, low molecular weight siloxane oligomers may be reduced or removed from the viewpoint of preventing contact failure and the like.
- the organopolysiloxane resins (b1) and (b2) have different weight average molecular weights (Mw).
- Mw weight average molecular weight
- the weight average molecular weight (Mw) is an average molecular weight in consideration of a ratio of each molecule to the whole in each organopolysiloxane resin measured in terms of standard polystyrene by gel permeation chromatography (GPC). .
- the component (b1) is an organopolysiloxane resin having a high molecular weight, and its weight average molecular weight (Mw) is 4500 or more, preferably 5000 or more, and particularly preferably 5500 or more.
- the component (b1) is a resin comprising the above-mentioned R 3 SiO 1/2 unit (M unit) and SiO 4/2 unit (Q unit) having a weight average molecular weight (Mw) in the range of 5,000 to 10,000. Is particularly preferred.
- the component (b2) is an organopolysiloxane resin having a small molecular weight, and its weight average molecular weight (Mw) is less than 4500, preferably 4000 or less, particularly preferably 3750 or less.
- the component (b1) is a resin comprising the above-mentioned R 3 SiO 1/2 unit (M unit) and SiO 4/2 unit (Q unit) having a weight average molecular weight (Mw) in the range of 500 to 3750. Is particularly preferred.
- the component (B) is an organopolysiloxane resin mixture containing the components (b1) and (b2) in a mass ratio of 1:99 to 99: 1, and the mixing ratio is not particularly limited. However, depending on the composition and the design of the viscoelasticity, it may be in the range of 5:95 to 95: 5, may be in the range of 10:90 to 90:10, and becomes 15:85 to 85:15. It may be a range.
- the present invention is characterized in that two or more resin components having different molecular weights are used in substantial combination, and the component (B) is not a mixture of these organopolysiloxane resins having different molecular weights,
- the ratio is outside the above-mentioned upper and lower limits, even if the content of the hydroxyl group or the hydrolyzable group of the resin component is 2.0% by mass or less, the curability, the adhesive strength and the storage which are the object of the present invention are obtained. In some cases, characteristics such as elastic modulus cannot be realized.
- the mass ratio of component (B) to component (A) is 0.9 to 0.9. It is characterized by being in the range of 3.0.
- the present invention This is because the desired properties such as curability, adhesive strength, and storage modulus can be suitably realized.
- the mass ratio of the component (B) to the component (A) may be in the range of 1.1 to 3.0, and is 1.5 or more, or It may be 2.0 or more.
- the properties such as curability, adhesive strength, and storage modulus, which are the objects of the present invention are adjusted even if other configurations are adjusted. It may not be possible.
- the component (C) is an organohydrogenpolysiloxane having two or more Si—H bonds in a molecule, and is a crosslinking agent for the organopolysiloxane composition according to the present invention.
- the molecular structure of the component (C) is not limited, and includes, for example, a linear, partially branched linear, branched, cyclic, or organopolysiloxane resin. And a partially branched linear or organopolysiloxane resin.
- the bonding position of the silicon-bonded hydrogen atom is not particularly limited, and examples thereof include a molecular chain terminal, a side chain, and both.
- the content of silicon-bonded hydrogen atoms is preferably from 0.1 to 2.0% by mass, more preferably from 0.5 to 1.7% by mass.
- an alkyl group having 1 to 8 carbon atoms such as a methyl group, an ethyl group, a propyl group, a butyl group and an octyl group; an aryl group such as a phenyl group and a tolyl group; a benzyl group and a phenethyl group Aralkyl groups such as 3-chloropropyl group and 3,3,3-trifluoropropyl group; and halogenated alkyl groups such as 50% by mole or more of those having 1 to 8 carbon atoms. It is preferably an alkyl group or a phenyl group.
- the other organic group is preferably a methyl group or a phenyl group in terms of ease of production and compatibility with the above-mentioned preferable components (A) and (B).
- a siloxane unit represented by the general formula: R ' 3 SiO 1/2 and a general formula: R' 2 HSiO 1 / 2 represented siloxane units of the formula are: an organopolysiloxane copolymer consisting of siloxane units represented by SiO 4/2, the general formula: siloxane units of the formula represented by R '2 HSiO 1/2: SiO
- An organopolysiloxane copolymer comprising a siloxane unit represented by 4/2 , comprising a siloxane unit represented by the general formula: R ' 2 HSiO 1/2 and a siloxane unit represented by the formula: R'SiO 3/2
- component (C) specifically, tris (dimethylhydrogensiloxy) methylsilane, tetra (dimethylhydrogensiloxy) silane, a methylhydrogenpolysiloxane having trimethylsiloxy groups at both ends, a dimethylsiloxane having trimethylsiloxy groups at both ends, Methyl hydrogen siloxane copolymer, dimethyl hydrogen siloxy group-blocked dimethyl siloxane / methyl hydrogen siloxane copolymer at both ends, cyclic methyl hydrogen oligo siloxane, cyclic methyl hydrogen siloxane / dimethyl siloxane copolymer, both ends of molecular chain Trimethylsiloxy-blocked methyl hydrogen siloxane / diphenyl siloxane copolymer, both ends of molecular chain tri-methyl siloxy-blocked methyl hydrogen siloxane diph Sulfonyl-dimethylsiloxane copolymer, hydroly
- organosiloxanes are also exemplified.
- Me and Ph represent a methyl group and a phenyl group, respectively, m is an integer of 1 to 100, n is an integer of 1 to 50, and b, c, d, and e are each positive. Where the sum of b, c, d, and e in one molecule is 1.
- the composition of the present invention is curable by a hydrosilylation reaction, and the amount of the component (C) is not particularly limited as long as the composition can be sufficiently cured by a hydrosilylation reaction.
- the amount of the component (C) is not particularly limited as long as the composition can be sufficiently cured by a hydrosilylation reaction.
- the amount, that is, the molar ratio is preferably in the range of 0.1 to 100, and may be in the range of 0.5 to 60, in the range of 1.0 to 50, or in the range of 1.0 to 40.
- the amount of SiH groups can be designed to be 10 or more, or 20 or more, and is preferably more than 20, more preferably 22 or more. preferable.
- a silicon-bonded hydrogen atom in component (C) with respect to the sum of the amount (substance amount) of alkenyl groups in component (A) and the amount (substance amount) of alkenyl groups in component (B) in the composition can be designed in the range of 20 to 60 and 22 to 50. If the amount of the SiH group is below the lower limit, the technical effect of improving the adhesion to the substrate may not be realized.
- the organopolysiloxane composition according to the present invention contains a hydrosilylation reaction catalyst.
- the hydrosilylation reaction catalyst include a platinum-based catalyst, a rhodium-based catalyst, and a palladium-based catalyst, and a platinum-based catalyst is preferable because curing of the present composition can be remarkably promoted.
- the platinum-based catalyst include platinum fine powder, chloroplatinic acid, an alcohol solution of chloroplatinic acid, a platinum-alkenylsiloxane complex, a platinum-olefin complex, and a platinum-carbonyl complex, and a platinum-alkenylsiloxane complex is particularly preferable. .
- the alkenyl siloxane includes 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane, Alkenyl siloxanes in which some of the methyl groups of these alkenyl siloxanes are substituted with groups selected from the group consisting of nitriles, amides, dioxolanes, and sulfolanes, ethyl groups, phenyl groups, and the like; vinyl of these alkenyl siloxanes
- An alkenyl siloxane in which a group is substituted with an allyl group, a hexenyl group or the like is exemplified.
- 1,3-divinyl-1,1,3,3-tetramethyldisiloxane is preferable because the platinum-alkenylsiloxane complex has good stability.
- a catalyst for promoting the hydrosilylation reaction a non-platinum-based metal catalyst such as iron, ruthenium, and iron / cobalt may be used.
- the content of the hydrosilylation reaction catalyst is not particularly limited, but the content of the platinum-based metal is in the range of 0.1 to 200 pm with respect to the total amount of solids in the composition. , 0.1 to 150 ppm, 0.1 to 100 ppm, and 0.1 to 50 ppm.
- the platinum-based metal is a group VIII metal element composed of platinum, rhodium, palladium, ruthenium, and iridium.In practice, the content of platinum metal excluding the ligand of the hydrosilylation reaction catalyst is in the above range.
- the solid content is a component (mainly a main component, an adhesion-imparting component, a cross-linking agent, a catalyst, and other non-volatile components) that forms a cured layer when the organopolysiloxane composition according to the present invention undergoes a curing reaction. Yes, and does not contain volatile components such as solvents that evaporate during heat curing.
- the content of the platinum-based metal in the organopolysiloxane composition according to the present invention is 50 ppm or less (45 ppm or less, 35 ppm or less, 30 ppm or less, 25 ppm or less, or 20 ppm or less), after curing, or when heat or ultraviolet light is applied. When exposed to energy rays, discoloration and coloring of the transparent pressure-sensitive adhesive layer may be particularly suppressed.
- the content of the platinum-based metal is 0.1 ppm or more, and if the content is less than the lower limit, curing failure may be caused.
- the component (E) is a curing retarder, which suppresses the cross-linking reaction between the alkenyl group in the composition and the SiH group in the component (C), prolongs the pot life at room temperature, and improves the storage stability. It is blended for the purpose. Therefore, practically, it is a component almost essential to the pressure-sensitive adhesive layer-forming organopolysiloxane composition of the present invention.
- the component (E) is exemplified by an acetylene compound, an enyne compound, an organic nitrogen compound, an organic phosphorus compound, and an oxime compound.
- the pressure-sensitive adhesive layer-forming organopolysiloxane composition of the present invention exhibits a viscosity increase within 1.5 times after the preparation of the composition at room temperature for 8 hours, and a range of 80 to 200.
- it is curable at a temperature of ° C. It is important from the viewpoints of handling workability, pot life, and properties after curing that suppression of thickening is included, including a large excess of the component (C) and optionally a low platinum-based metal content. This is because the curability can be ensured by curing at a certain high temperature (80 to 200 ° C.).
- such a composition can be realized by selecting a suitable combination and a compounding amount of each of the above components and the hydrosilylation catalyst and the component (E).
- the organopolysiloxane composition according to the present invention may contain an organic solvent as a solvent in addition to the suitable components (A) and (B).
- the type and the amount of the organic solvent are adjusted in consideration of coating workability and the like.
- the organic solvent include aromatic hydrocarbon solvents such as toluene, xylene, and benzene; aliphatic hydrocarbon solvents such as heptane, hexane, octane, and isoparaffin; ester solvents such as ethyl acetate and isobutyl acetate; and diisopropyl.
- Ether solvents such as ether and 1,4-dioxane; chlorinated aliphatic hydrocarbon solvents such as trichloroethylene, perchloroethylene and methylene chloride; and solvent volatile oils. Two or more of them may be combined as needed.
- the amount of the organic solvent is preferably such that the mixture of the components (A) to (C) can be uniformly applied to the surface of the sheet-like base material.
- the components (A), (B) and (C) It is 5-3000 parts by mass per 100 parts by mass of the total components.
- the organopolysiloxane composition according to the present invention may optionally contain components other than the above components as long as the technical effects of the present invention are not impaired.
- adhesion promoter such as polydimethylsiloxane or polydimethyldiphenylsiloxane
- antioxidant such as phenolic, quinone, amine, phosphorus, phosphite, sulfur, or thioether type Agent
- light stabilizer such as triazole or benzophenone
- flame retardant such as phosphate ester, halogen, phosphorus or antimony
- cationic surfactant, anionic surfactant or nonionic surfactant One or more kinds of antistatic agents or the like composed of an agent or the like can be included.
- pigments, dyes, inorganic fine particles (reinforcing fillers, dielectric fillers, conductive fillers, thermally conductive fillers) and the like can also be arbitrarily compounded
- the organopolysiloxane composition according to the present invention includes a non-reactive organopolysiloxane such as polydimethylsiloxane or polydimethyldiphenylsiloxane containing no carbon-carbon double bond-containing reactive group such as alkenyl group, acryl group and methacryl group.
- Polysiloxane can be blended, which can improve the loss coefficient (tan ⁇ ), storage modulus (G ′), and loss modulus (G ′′) of the pressure-sensitive adhesive layer described below in some cases.
- the use of hydroxyl terminated polydimethylsiloxane or polydimethyldiphenylsiloxane can increase the loss factor of the pressure sensitive adhesive layer, and such compositions are within the scope of the present invention.
- the method for preparing the organopolysiloxane composition according to the present invention is not particularly limited, and is performed by uniformly mixing the respective components.
- a solvent may be added as necessary, and the mixture may be prepared by mixing at a temperature of 0 to 200 ° C. using a known stirrer or kneader.
- the organopolysiloxane composition of the present invention forms a coating film by coating on a substrate, and is heated at a temperature of 80 to 200 ° C., preferably 90 to 190 ° C. To give a cured product.
- the coating method include a gravure coat, offset coat, offset gravure, roll coat, reverse roll coat, air knife coat, curtain coat, and comma coat.
- the organopolysiloxane composition of the present invention is characterized in that a cured layer obtained by curing the composition by a hydrosilylation reaction is pressure-sensitive adhesive. Since the pressure-sensitive adhesive layer of the present invention has the above-described structure and exhibits practically sufficient adhesive strength, it can be used by replacing a known silicone pressure-sensitive adhesive as desired.
- the pressure-sensitive adhesive layer having a thickness of 50 ⁇ m obtained by curing the organopolysiloxane composition of the present invention and a 2-mm-thick polymethyl methacrylate sheet were subjected to a tensile test using a 180 ° peel test method according to JIS Z0237.
- a pressure-sensitive adhesive layer having an adhesive force measured at a speed of 300 mm / min in the range of 900 to 4000 gf / inch can be designed, and a pressure-sensitive adhesive layer in the range of 1000 to 3500 gf / inch is suitable.
- the thickness (50 ⁇ m) is the thickness of the cured layer itself, which serves as a reference for objectively defining the adhesive strength of the cured layer according to the present invention, and the organopolysiloxane composition of the present invention has a thickness of 50 ⁇ m. It goes without saying that it can be used as a cured layer or a pressure-sensitive adhesive layer of any thickness without limitation.
- the pressure-sensitive adhesive layer obtained by curing the composition has a shear storage modulus G ′ at ⁇ 20 ° C. in the range of 0.77 to 50.00 MPa.
- the storage elastic modulus G ' may be in the range of 0.77 to 30.00 MPa, may be in the range of 0.81 to 30.00 MPa, and may be in the range of 0.85 to 29.00 MPa. Included in the scope of the invention.
- the pressure-sensitive adhesive layer-forming organopolysiloxane composition of the present invention can form an elastic adhesive member. It is suitable for electronic devices such as speakers and transducers, as a member of electrical devices, and for applications to advanced electronic materials such as smart devices and display devices.
- the storage elastic modulus (G ') of the pressure-sensitive adhesive layer according to the present invention can be measured by a known measuring method.
- the storage elastic modulus (G ′) can be measured using an MCR301 viscoelasticity measuring device (manufactured by Anton Paar), and a disk-shaped sample having a diameter of 8 mm and a thickness of about 0.5 to 1 mm is used, and an 8 mm parallel plate is used. It can be measured as a value at ⁇ 20 ° C. in the range of ⁇ 40 ° C. to 100 ° C., which is the operating temperature, at a frequency of 1 Hz, a strain of 0.1%, and a temperature rising rate of 3 ° C./min.
- the pressure-sensitive adhesive layer according to the present invention may have a storage elastic modulus G ′ at 1.0 Hz at ⁇ 20 ° C. of at least 3 times the storage elastic modulus G ′ at 1.0 Hz at 25 ° C.
- the organopolysiloxane composition of the present invention may be substantially transparent, translucent or opaque, and its transparency can be designed according to the use of the pressure-sensitive adhesive layer.
- a 10-1000 ⁇ m-thick film-shaped cured product obtained by curing the organopolysiloxane composition of the present invention is preferably visually transparent, and is preferably carbon black or the like. It is preferable not to include a coloring additive.
- the transmittance of the pressure-sensitive adhesive layer for a display device which is formed of a cured layer having a thickness of 100 ⁇ m, at a wavelength of 450 nm is more objectively 80% when the value of air is 100%. % Or more, preferably 90% or more, and may be designed to be 95% or more.
- a translucent to opaque pressure-sensitive adhesive layer may be used. Depending on the required characteristics other than light transmission, coloring or light transmission may be used. Filler components or additives that impair the properties may be used.
- the organopolysiloxane composition of the present invention can be designed so that the cured product is not colored in addition to the above-described transparency by optionally reducing the content of a platinum-based metal in the cured layer. It is possible. Specifically, a cured layer having a thickness of 100 ⁇ m obtained by curing the organopolysiloxane composition of the present invention was measured immediately after the curing by a b * measured by the L * a * b * color system specified in JIS Z 8729. The value can be designed to be less than or equal to 0.15 and even less than or equal to 0.10. Having such a b * value means that the cured layer is substantially transparent and is not colored yellow.
- the cured layer of the present invention can be designed so that its color tone does not significantly change even when it is exposed to high-energy rays such as high temperature and ultraviolet rays for a long time, and in particular, yellowing does not occur.
- a cured layer having a thickness of 100 ⁇ m obtained by curing the organopolysiloxane composition of the present invention is defined in JIS Z 8729 before and after the evaluation.
- the design can be made so that the change ( ⁇ b *) of the b * value measured in the L * a * b * color system is 0.20 or less and 0.15 or less. Note that ⁇ b * is the absolute value of a numerical change.
- the cured product of the present invention can be used particularly as a pressure-sensitive adhesive layer. Further, in order to improve the adhesion to the adherend, a surface treatment such as a primer treatment, a corona treatment, an etching treatment, and a plasma treatment may be performed on the surface of the pressure-sensitive adhesive layer or the substrate.
- a surface treatment such as a primer treatment, a corona treatment, an etching treatment, and a plasma treatment may be performed on the surface of the pressure-sensitive adhesive layer or the substrate.
- the pressure-sensitive adhesive layer of the present invention has excellent adhesion to a substrate such as a display device, and therefore, if necessary, may further include these steps to further improve the adhesion to an adherend. Higher production efficiency may be realized by omitting these steps.
- the curable organopolysiloxane composition according to the present invention is applied to a release liner, cured by heating under the above temperature conditions, and peeled off the release liner to form a film-like substrate, a tape-like substrate, or After being bonded to a sheet-like substrate (hereinafter referred to as a “film-like substrate”) or coated on a film-like substrate, it is cured by heating under the above-mentioned temperature conditions, and the surface of the substrate is sensed.
- a pressure-sensitive adhesive layer can be formed.
- a cured layer obtained by curing the organopolysiloxane composition according to the present invention on these film-shaped substrates, particularly a laminate having a film-shaped pressure-sensitive adhesive layer, has an adhesive tape, a bandage, a low-temperature support, It may be used for transfer films, labels, emblems and decorative or descriptive signs. Further, the cured layer obtained by curing the organopolysiloxane composition according to the present invention may be used for assembling automobile parts, toys, electronic circuits, or keyboards. Alternatively, a cured layer obtained by curing the organopolysiloxane composition according to the present invention, particularly a film-shaped pressure-sensitive adhesive layer, may be used for construction and use of a laminated touch screen or flat panel display.
- Examples of the type of the substrate include paperboard, corrugated paper, clay-coated paper, polyolefin-laminated paper, especially polyethylene-laminated paper, synthetic resin film / sheet, natural fiber cloth, synthetic fiber cloth, artificial leather cloth, and metal foil.
- a synthetic resin film or sheet is preferable, and examples of the synthetic resin include polyimide, polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polycarbonate, polyethylene terephthalate, cyclopolyolefin, and nylon.
- a film of a heat-resistant synthetic resin such as polyimide, polyetheretherketone, polyethylene naphthalate (PEN), liquid crystal polyarylate, polyamideimide, or polyethersulfone is suitable.
- a heat-resistant synthetic resin such as polyimide, polyetheretherketone, polyethylene naphthalate (PEN), liquid crystal polyarylate, polyamideimide, or polyethersulfone.
- transparent substrates specifically, transparent materials such as polypropylene, polystyrene, polyvinylidene chloride, polycarbonate, polyethylene terephthalate, and PEN are preferred.
- the substrate is preferably in the form of a film or a sheet.
- the thickness is not particularly limited, and can be designed with a desired thickness according to the application.
- a support film subjected to a primer treatment, a corona treatment, an etching treatment, and a plasma treatment may be used.
- the surface of the film-shaped substrate opposite to the surface of the pressure-sensitive adhesive layer may be subjected to a surface treatment such as a treatment such as scratch prevention, stain prevention, fingerprint adhesion prevention, glare prevention, reflection prevention, and antistatic treatment. .
- the coating amount can be designed to have a desired thickness according to the use of the display device or the like.
- the thickness of the pressure-sensitive adhesive layer after curing is 1 to 1,000 ⁇ m, and 5 to 900 ⁇ m. And may be 10 to 800 ⁇ m, but is not limited thereto.
- the pressure-sensitive adhesive layer according to the present invention may be a single layer or a multilayer formed by laminating two or more pressure-sensitive adhesive layers depending on the required characteristics.
- the multilayer pressure-sensitive adhesive layer may be formed by laminating pressure-sensitive adhesive films prepared one by one, and the pressure-sensitive adhesive layer-forming organopolysiloxane composition is coated on a film substrate having a release layer. The step of working and curing may be performed a plurality of times.
- the pressure-sensitive adhesive layer according to the present invention has a function as another functional layer selected from a dielectric layer, a conductive layer, a heat dissipation layer, an insulating layer, a reinforcing layer, and the like, in addition to an adhesion or adhesion function between members. Is also good.
- the cured layer obtained by curing the organopolysiloxane composition of the present invention is a pressure-sensitive adhesive layer, particularly a pressure-sensitive adhesive film
- the cured layer is a film substrate having a release layer having a release coating ability. It is preferable to handle the above as a laminated film which is adhered in a peelable state.
- the release layer is sometimes called a release liner, a separator, a release layer or a release coating layer, and is preferably a release coating such as a silicone release agent, a fluorine release agent, an alkyd release agent, or a fluorosilicone release agent.
- a release layer having a function, or a substrate itself which is physically hardly formed with fine irregularities on the surface of the substrate or hardly adheres to the pressure-sensitive adhesive layer of the present invention may be used.
- a release layer obtained by curing a fluorosilicone release agent as the release layer.
- the cured product obtained by curing the organopolysiloxane composition of the present invention has both the above-mentioned viscoelasticity and adhesive strength, and thus is useful as an elastic adhesive member as a member of various electronic devices or electric devices.
- it is useful as an electronic material, a member for a display device, or a member for a transducer (including a sensor, a speaker, an actuator, and a generator), and a preferable use of the cured product is a member of an electronic component or a display device. .
- a cured product in the form of a film is suitable as a display panel or a member for a display, and in particular, It is particularly useful for so-called touch panel applications in which devices, especially electronic devices, can be operated by touching the screen with a fingertip or the like.
- the opaque elastic pressure-sensitive adhesive layer is not particularly required to have transparency, and is particularly useful for a film or sheet-like member used for a sensor, a speaker, an actuator, or the like in which the pressure-sensitive adhesive layer itself requires a certain elasticity or flexibility. It is.
- the pressure-sensitive adhesive layer obtained by curing the organopolysiloxane composition of the present invention can realize pressure-sensitive adhesive properties equivalent to those of the conventional silicone pressure-sensitive adhesive layer, and has poor curing and reduced curability.
- the adhesion to a substrate such as a display device can be improved without causing the problem described above.
- the cured product obtained by curing the organopolysiloxane composition of the present invention can be used for construction and use of a laminated touch screen or flat panel display.
- Silicone PSA can be used without particular limitation.
- a cured product obtained by curing the organopolysiloxane composition of the present invention is an optically transparent silicone-based pressure-sensitive adhesive film disclosed in JP-A-2014-522436 or JP-A-2013-512326.
- it can be used as a pressure-sensitive adhesive layer in the production of a display device such as a touch panel.
- a cured product obtained by curing the organopolysiloxane composition of the present invention can be used as an adhesive layer or an adhesive film described in JP-A-2013-512326 without any particular limitation.
- the touch panel according to the present invention includes a base material such as a conductive plastic film having a conductive layer formed on one surface, and a touch panel according to the present invention attached to a surface on which the conductive layer is formed or a surface on the opposite side thereof. It may be a touch panel including a cured layer obtained by curing the curable organopolysiloxane composition.
- the substrate is preferably a sheet or film substrate, and a resin film or a glass plate is exemplified.
- the conductive plastic film may be a resin film or a glass plate having an ITO layer formed on one surface, particularly, a polyethylene terephthalate film.
- a cured product obtained by curing the organopolysiloxane composition of the present invention may be used as an adhesive film for a polarizing plate used in the production of a display device such as a touch panel, and a touch panel described in JP-A-2013-065009. It may be used as a pressure-sensitive adhesive layer used for bonding between the display module and the display module.
- Naru pressure-sensitive adhesive films are used for television receivers, computer monitors, personal digital assistant monitors, monitoring monitors, video cameras, digital cameras, mobile phones, personal digital assistants, instrument panel displays for automobiles, etc., and various equipment and devices. It can be used for various display devices for displaying characters, symbols and images, such as instrument panel displays, automatic ticket vending machines, automatic teller machines, on-vehicle display devices, and on-vehicle transmission screens.
- the surface shape of such a display device may be not a flat surface but a curved surface or a curved shape.
- various flat panel displays (FPDs) curved displays used for automobiles (including electric vehicles) and aircrafts, etc.
- a curved transmission screen is exemplified.
- these display devices include icons for executing functions or programs on a screen or a display, notification display of an e-mail program, etc., and operation buttons of various devices such as a car navigation device, an audio device, and an air conditioner.
- a touch panel function that enables input operations by touching these icons, notification displays, and operation buttons with a finger may be added.
- the device examples include a display device such as a CRT display, a liquid crystal display, a plasma display, an organic EL display, an inorganic EL display, an LED display, a surface electrolytic display (SED), a field emission display (FED), and a touch panel using these devices.
- a display device such as a CRT display, a liquid crystal display, a plasma display, an organic EL display, an inorganic EL display, an LED display, a surface electrolytic display (SED), a field emission display (FED), and a touch panel using these devices.
- SED surface electrolytic display
- FED field emission display
- the cured product obtained by curing the composition has excellent adhesiveness and viscoelasticity, it is a film for a transducer member (including a sensor, a speaker, an actuator, and a generator) such as a speaker membrane.
- a transducer member including a sensor, a speaker, an actuator, and a generator
- it can be used as a sheet-like member
- the pressure-sensitive adhesive layer obtained by curing the organopolysiloxane composition of the present invention may be substantially transparent, and does not cause problems such as poor curing or deterioration in curability, and can be used for various display devices. Because of its excellent adhesion to materials, it is suitable for display devices for vehicles that have good visibility and operability of display contents for a long period of time, especially for vehicle display devices that have a curved screen or a curved display and optionally have a touch panel function. It can be suitably used. For example, JP-A-2017-047767, JP-A-2014-182335, JP-A-2014-063064, JP-A-2013-233852, and the like disclose a vehicle display device having a curved display surface.
- the pressure-sensitive adhesive layer according to the present invention can be suitably applied or replaced as part or all of an adhesive layer or a pressure-sensitive adhesive layer requiring transparency in these documents.
- the pressure-sensitive adhesive layer-forming organopolysiloxane composition of the present invention can be used for other known curved display devices by replacing the currently used adhesive layer or adhesive layer requiring transparency.
- the transparent film-like substrate provided with the pressure-sensitive adhesive layer of the present invention is used for the purpose of preventing scratches on the display surface, preventing dirt, preventing fingerprint adhesion, preventing static electricity, preventing reflection, and preventing peeping. May be.
- the film was hollowed out to a diameter of 8 mm, and attached to a parallel plate probe of a dynamic viscoelasticity device (MCR301, manufactured by Anton Paar), and the storage elastic modulus G ′ was measured.
- the measurement conditions are in the range of ⁇ 70 ° C. to 200 ° C., measured at a frequency of 1 Hz and a heating rate of 3 ° C./min, and the loss coefficient, storage modulus G ′, and loss modulus G ′′ are measured.
- the storage modulus G ′ at 20 ° C. was recorded.
- Table 1 shows the materials of the curing reactive organopolysiloxane composition.
- the viscosity or plasticity of each component was measured at room temperature by the following method.
- the viscosity (mPa ⁇ s) is a value measured using a rotational viscometer according to JIS K7117-1, and the kinematic viscosity (mm 2 / s) is measured using an Ubbelohde viscometer according to JIS Z8803. Value.
- Plasticity The plasticity was measured according to the method specified in JIS K 6249 (at 25 ° C., 4.2 g of a spherical sample was subjected to a load of 1 kgf for 3 minutes, and the thickness was read to 1/100 mm. Numerical value multiplied by 100).
- Example 1 32.9 parts by weight of the vinyl-functional polydimethylsiloxane of the component a, 52.6 parts by weight of the MQ silicone resin of the component b1, 44.4 parts by weight of the MQ silicone resin of the component b2, 92.3 parts by weight of toluene, and both components c1 0.756 parts by weight of a dimethylsiloxane-methylhydrogensiloxane copolymer having a terminal trimethylsiloxy group-capped and 0.577 parts by weight of a 20% solution of a curing retarder of the component e were mixed well at room temperature, and the platinum-based component 0.484 parts by weight of a hydrosilylation reaction catalyst was added to obtain a curing-reactive organopolysiloxane composition.
- the molar ratio (SiH / Vi ratio) of the SiH group in the component c1 to the amount of the alkenyl group in the component a was 34.9, and the content of the platinum metal with respect to the solid content was 30 ppm.
- the composition was cured by the method described above, and the adhesion, viscoelasticity, and stress strain to the PMMA plate were measured by the method described above, and the evaluation results and the like are shown in Table 2.
- Example 2 32.2 parts by weight of the vinyl-functional polydimethylsiloxane of the component a, 41.6 parts by weight of the MQ silicone resin of the component b1, 54.7 parts by weight of the MQ silicone resin of the component b2, 93.7 parts by weight of toluene, and both components c1 0.745 parts by weight of a dimethylsiloxane / methylhydrogensiloxane copolymer having a terminal trimethylsiloxy group-capped and 0.577 parts by weight of a 20% solution of a curing retarder of the component e are mixed well at room temperature, and the platinum-based component d1 is added to the mixture.
- a hydrosilylation reaction catalyst 0.484 parts by weight of a hydrosilylation reaction catalyst was added to obtain a curing-reactive organopolysiloxane composition.
- the molar ratio (SiH / Vi ratio) of the SiH group in the component c1 to the amount of the alkenyl group in the component a was 35.1, and the content of platinum metal with respect to the solid content was 30 ppm.
- the composition was cured by the method described above, and the adhesion, viscoelasticity, and stress strain to the PMMA plate were measured by the method described above, and the evaluation results and the like are shown in Table 2.
- Example 3 31.6 parts by weight of the vinyl-functional polydimethylsiloxane of the component a, 26.8 parts by weight of the MQ silicone resin of the component b1, 68.0 parts by weight of the MQ silicone resin of the component b2, 95.8 parts by weight of toluene, and both of the component c1 0.737 parts by weight of a dimethylsiloxane / methylhydrogensiloxane copolymer having a terminal trimethylsiloxy group-capped and 0.577 parts by weight of a 20% solution of a curing retarder of the component e are mixed well at room temperature, and the platinum-based component d2 is added to the mixture.
- a hydrosilylation reaction catalyst 0.577 parts by weight of a hydrosilylation reaction catalyst was added to obtain a curing-reactive organopolysiloxane composition.
- the molar ratio (SiH / Vi ratio) of the SiH group in the component c1 to the amount of the alkenyl group in the component a was 35.4, and the content of the platinum metal with respect to the solid content was 30 ppm.
- the composition was cured by the method described above, and the adhesion, viscoelasticity, and stress strain to the PMMA plate were measured by the method described above, and the evaluation results and the like are shown in Table 2.
- Example 4 34.7 parts by weight of the vinyl-functional polydimethylsiloxane of the component a, 2.37 parts by weight of the MQ silicone resin of the component b1, 84.5 parts by weight of the MQ silicone resin of the component b2, 45.1 parts by weight of toluene, and both components c1 0.656 parts by weight of a dimethylsiloxane / methylhydrogensiloxane copolymer having a terminal trimethylsiloxy group and 0.409 parts by weight of a 20% solution of a curing retarder of the component e are mixed well at room temperature. 0.355 parts by weight of a hydrosilylation reaction catalyst was added to obtain a curing-reactive organopolysiloxane composition.
- the molar ratio (SiH / Vi ratio) of the SiH group in the component (c1) to the amount of the alkenyl group in the component (a) was 28.7, and the content of platinum metal with respect to the solid content was 22 ppm.
- the composition was cured by the method described above, and the adhesion, viscoelasticity, and stress strain to the PMMA plate were measured by the method described above, and the evaluation results and the like are shown in Table 2.
- compositions can be formulated: 25.7 parts by weight of the vinyl-functional polydimethylsiloxane of component a, 6.43 parts by weight of the non-functional polydimethylsiloxane of component a ', 41.6 parts by weight of MQ silicone resin of component b1, and MQ silicone resin 54 of component b2 0.72 parts by weight, toluene 38.2 parts by weight, 0.582 parts by weight of a dimethylsiloxane / methylhydrogensiloxane copolymer having c-terminal trimethylsiloxy groups of component c1, 0.577 parts by weight of a 20% solution of a component e curing retarder Were well mixed at room temperature, and 0.484 parts by weight of a platinum-based hydrosilylation reaction catalyst of Component d1 was added to the mixture to obtain a curing-reactive organopolysiloxane composition.
- the molar ratio (SiH / Vi ratio) of the SiH group in the component c1 to the amount of the alkenyl group in the component a was 28.4, and the content of the platinum metal with respect to the solid content was 30 ppm.
- the composition was cured by the method described above, and the adhesion, viscoelasticity, and stress strain to the PMMA plate were measured by the method described above, and the evaluation results and the like are shown in Table 2.
- the molar ratio (SiH / Vi ratio) of the SiH group in the component c2 to the amount of the alkenyl group in the component a was 28.4, and the content of the platinum metal with respect to the solid content was 30 ppm.
- the composition was cured by the method described above, and the adhesion, viscoelasticity, and stress strain to the PMMA plate were measured by the method described above, and the evaluation results and the like are shown in Table 2.
- a hydrosilylation reaction catalyst 0.577 parts by weight of a hydrosilylation reaction catalyst was added to obtain a curing-reactive organopolysiloxane composition.
- the molar ratio (SiH / Vi ratio) of the SiH group in the component c1 to the amount of the alkenyl group in the component a was 35.4, and the content of the platinum metal with respect to the solid content was 30 ppm.
- the composition was cured by the method described above, and the adhesion, viscoelasticity, and stress strain to the PMMA plate were measured by the method described above, and the evaluation results and the like are shown in Table 2.
- the molar ratio (SiH / Vi ratio) of the SiH group in the component c1 to the amount of the alkenyl group in the component a was 28.6, and the content of platinum metal with respect to the solid content was 30 ppm.
- the composition was cured by the method described above, and the adhesion, viscoelasticity, and stress strain to the PMMA plate were measured by the method described above, and the evaluation results and the like are shown in Table 2.
- the pressure-sensitive adhesive layer-forming organopolysiloxane compositions according to Examples 1 to 4 have sufficient curability and a good storage elastic modulus G ′ at ⁇ 20 ° C. of 0.77 MPa or more. It is in the range (0.904, 8.67, 9.32, 13.00 MPa), and has practically sufficient adhesive strength.
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Abstract
Description
「[1](A)分子内に平均して1を超える数のアルケニル基を有する鎖状オルガノポリシロキサン、
(B)以下の(b1)成分および(b2)成分を1:99~99:1の質量比で含む、オルガノポリシロキサンレジン混合物:
(b1)分子内の全ケイ素原子に対する水酸基および加水分解性基の含有量の和が9モル%以下であり、ゲルパーミエーションクロマトグラフィー(GPC)により標準ポリスチレン換算で測定される重量平均分子量(Mw)が4500以上であるオルガノポリシロキサンレジン、
(b2)分子内の全ケイ素原子に対する水酸基および加水分解性基の含有量の和が9モル%以下であり、ゲルパーミエーションクロマトグラフィー(GPC)により標準ポリスチレン換算で測定される重量平均分子量(Mw)が4500未満であるオルガノポリシロキサンレジン
(C)分子内に少なくとも2個のSi-H結合を有するオルガノハイドロジェンポリシロキサン、および
(D)有効量のヒドロシリル化反応触媒
を含有してなり、(A)成分に対する(B)成分の質量比が0.9~3.0の範囲にあり、当該組成物の硬化により得られる感圧接着層の-20℃におけるせん断貯蔵弾性率G’が0.77~50.00MPaの範囲にある感圧接着層形成性オルガノポリシロキサン組成物
[2]当該組成物の硬化により得られる厚み50μmの感圧接着層の、厚み2mmのポリメチルメタクリレートシートに対する、JIS Z 0237に従う180°引き剥がし試験方法を用いて引張速度300mm/minにより測定された粘着力が900~4000gf/inchの範囲であることを特徴とする、[1]に記載の感圧接着層形成性オルガノポリシロキサン組成物。
[3](A)成分の少なくとも一部が、(A1)25℃において100,000mPa・s以上の粘度を有するか、JIS K6249に規定される方法に準じて測定された可塑度が50~200の範囲にある生ゴム状のアルケニル基含有オルガノポリシロキサンであり、そのアルケニル基中のビニル(CH2=CH)部分の含有量が0.005~0.400質量%の範囲にある鎖状オルガノポリシロキサンであり、
(B)成分であるオルガノポリシロキサンレジン混合物が、R3SiO1/2単位(式中、Rは一価有機基であり、Rの90モル%以上が炭素数1~6のアルキル基またはフェニル基である;M単位)及びSiO4/2単位(Q単位)から実質的になるオルガノポリシロキサンレジン混合物であり
(C)成分の量が、上記の(A)成分中および(B)成分中のアルケニル基の物質量の和に対する(C)成分中のSiH基の物質量の比(モル比)が0.1~100となる量であり、
(D)成分の量が、組成物中の固形分中の白金系金属の含有量が0.1~200ppmの範囲である、[1]または[2]のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物。
[4](C)成分の量が、上記の(A)成分中および(B)成分中のアルケニル基の物質量の和に対する(C)成分中のSiH基の物質量の比(モル比)が20~60となる量である[1]~[3]のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物。
[5]さらに、(A´)分子内に炭素-炭素二重結合含有反応性基を含まない鎖状オルガノポリシロキサンを含む、[1]~[4]のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物
[6][1]~[5]のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物を硬化してなる感圧接着剤層。
[7]フィルム状基材上に、[1]~[5]のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物を硬化してなる感圧接着剤層を備えた積層体。
[8]1または2以上のフィルム状基材に当該感圧接着剤層に対する剥離層が設けられている、[7]に記載の積層体。
[9]フィルム状基材、
該フィルム状基材上に形成された第1剥離層、
該剥離層上に[1]~[5]のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物を塗工し硬化させて形成された感圧接着層、及び
該感圧接着層上に積層された第2剥離層
を含む、[7]または[8]の積層体。
[10][1]~[5]のいずれか1項記載の感圧接着層形成性オルガノポリシロキサン組成物を硬化してなる、弾性粘着部材。
[11][10]に記載の弾性粘着部材を含む電子機器または電気的装置。」
である。
まず、本発明にかかる感圧接着層形成性オルガノポリシロキサン組成物について説明する。当該組成物は、ヒドロシリル化反応を含む硬化反応により速やかに硬化し、貯蔵弾性率(G’) の設計の自由度が高く、-20℃におけるせん断貯蔵弾性率G’が0.77以上の幅広い領域で弾性率を設計することができ、実用上十分な粘着力を有する感圧接着層を形成するものである。以下、その各構成成分、技術的特徴であるオルガノポリシロキサンレジン混合物の範囲、その鎖状オルガノポリシロキサンに対するオルガノポリシロキサンレジンの質量比、および感圧接着層の特性について説明する。
(A)分子内に平均して1を超える数のアルケニル基を有する鎖状オルガノポリシロキサン、
(B)以下の(b1)成分および(b2)成分を1:99~99:1の質量比で含む、オルガノポリシロキサンレジン混合物:
(b1)分子内の全ケイ素原子に対する水酸基および加水分解性基の含有量の和が9モル%以下であり、ゲルパーミエーションクロマトグラフィー(GPC)により標準ポリスチレン換算で測定される重量平均分子量(Mw)が4500以上であるオルガノポリシロキサンレジン、
(b2)分子内の全ケイ素原子に対する水酸基および加水分解性基の含有量の和が9モル%以下であり、ゲルパーミエーションクロマトグラフィー(GPC)により標準ポリスチレン換算で測定される重量平均分子量(Mw)が4500未満であるオルガノポリシロキサンレジン
(C)分子内に少なくとも2個のSi-H結合を有するオルガノハイドロジェンポリシロキサン、および
(D)有効量のヒドロシリル化反応触媒
を含有してなる。また、当該組成物は、ヒドロシリル化反応触媒を含むので、取扱作業性の見地から、さらに、(E)硬化遅延剤を含有してもよく、本発明の目的に反しない範囲で、その他の添加剤を含むものであってよい。以下、各成分について説明する。
(b1)分子内の全ケイ素原子に対する水酸基および加水分解性基の含有量の和が9モル%以下であり、ゲルパーミエーションクロマトグラフィー(GPC)により標準ポリスチレン換算で測定される重量平均分子量(Mw)が4500以上であるオルガノポリシロキサンレジン、
(b2)分子内の全ケイ素原子に対する水酸基および加水分解性基の含有量の和が9モル%以下であり、ゲルパーミエーションクロマトグラフィー(GPC)により標準ポリスチレン換算で測定される重量平均分子量(Mw)が4500未満であるオルガノポリシロキサンレジン
本発明に係る感圧接着層形成性オルガノポリシロキサン組成物は、鎖状の反応性シロキサン成分である(A)成分に対する、オルガノポリシロキサンレジンである(B)成分の質量比が0.9~3.0の範囲にあることを特徴とする。(B)成分として、上記の特徴的なオルガノポリシロキサンレジン混合物を選択し、かつ、鎖状のシロキサンポリマー成分に対して上記のレジン成分が前記範囲となるように配合されていると、本発明の目的とする硬化性、粘着力および貯蔵弾性率等の特性が好適に実現されるためである。特に、(A)成分に対する、(B)成分の質量比は1.1~3.0の範囲であってよく、所望の
粘着力および貯蔵弾性率を実現するために、1.5以上、あるいは2.0以上であってもよい。一方、(A)成分に対する、(B)成分の質量比が前記範囲外であると、他の構成を調整しても本発明の目的とする硬化性、粘着力および貯蔵弾性率等の特性が実現できない場合がある。
ケイ素原子結合水素原子の含有量は0.1~2.0質量%であることが好ましく、0.5~1.7質量%であることがより好ましい。
(式中、Meはメチル基であり、RTはメチル基または水素原子であり、q,rは0.3≦r/(q+r)≦1、5≦ (q+r)≦200の関係を満たす数である。)で示されるメチルハイドロジェンポリシロキサンが好ましい。なお、上記(C)成分は異なるもの2種以上を併用してもよい。
HMe2SiO(Ph2SiO)mSiMe2H
HMePhSiO(Ph2SiO)mSiMePhH
HMePhSiO(Ph2SiO)m(MePhSiO)nSiMePhH
HMePhSiO(Ph2SiO)m(Me2SiO)nSiMePhH
(HMe2SiO1/2)b(PhSiO3/2)c
(HMePhSiO1/2)b(PhSiO3/2)c
(HMePhSiO1/2)b(HMe2SiO1/2)c(PhSiO3/2)d
(HMe2SiO1/2)b(Ph2SiO2/2)c(PhSiO3/2)d
(HMePhSiO1/2)b(Ph2SiO2/2)c(PhSiO3/2)d
(HMePhSiO1/2)b(HMe2SiO1/2)c(Ph2SiO2/2)d(PhSiO3/2)e
本発明の組成物は、ヒドロシリル化反応硬化性であり、(C)成分の使用量は、組成物がヒドロシリル化反応により十分に硬化することができれば特に制限されるものではないが、組成物中の(A)成分中のアルケニル基の量(物質量)および(B)成分中のアルケニル基の量(物質量)の和に対する(C)成分中のケイ素原子結合水素原子(SiH)基の物質量、すなわちモル比が0.1~100の範囲であることが好ましく、0.5~60の範囲、1.0~50の範囲、または1.0~40の範囲であっても良い。
本発明にかかるオルガノポリシロキサン組成物は、ヒドロシリル化反応触媒を含む。ヒドロシリル化反応触媒としては、白金系触媒、ロジウム系触媒、パラジウム系触媒が例示され、本組成物の硬化を著しく促進できることから白金系触媒が好ましい。この白金系触媒としては、白金微粉末、塩化白金酸、塩化白金酸のアルコール溶液、白金-アルケニルシロキサン錯体、白金-オレフィン錯体、白金-カルボニル錯体が例示され、特に、白金-アルケニルシロキサン錯体が好ましい。このアルケニルシロキサンとしては、1,3-ジビニル-1,1,3,3-テトラメチルジシロキサン、1,3,5,7-テトラメチル-1,3,5,7-テトラビニルシクロテトラシロキサン、これらのアルケニルシロキサンのメチル基の一部をニトリル類、アミド類、ジオキソラン類、及びスルホラン類からなる群から選択される基、エチル基、フェニル基等で置換したアルケニルシロキサン、これらのアルケニルシロキサンのビニル基をアリル基、ヘキセニル基等で置換したアルケニルシロキサンが例示される。特に、この白金-アルケニルシロキサン錯体の安定性が良好であることから、1,3-ジビニル-1,1,3,3-テトラメチルジシロキサンであることが好ましい。なお、ヒドロシリル化反応を促進する触媒としては、鉄、ルテニウム、鉄/コバルトなどの非白金系金属触媒を用いてもよい。
本発明にかかるオルガノポリシロキサン組成物には、アルケニル基、アクリル基、メタクリル基等の炭素-炭素二重結合含有反応性基を含まないポリジメチルシロキサンまたはポリジメチルジフェニルシロキサンなどの非反応性のオルガノポリシロキサンを配合することができ、これにより、後述する感圧接着層の損失係数(tanδ)、貯蔵弾性率(G’)および損失弾性率(G’’)を改善することができる場合がある。例えば、水酸基末端を有するポリジメチルシロキサンまたはポリジメチルジフェニルシロキサンの使用により、感圧接着層の損失係数を増加させることができ、そのような組成物は、本発明の範囲に包含される。
本発明のオルガノポリシロキサン組成物は、ヒドロシリル化反応により当該組成物を硬化させてなる硬化層が感圧接着性であることを特徴とする。本発明の感圧接着層は、上記の構成を有し、実用上十分な粘着力を発現することから、公知のシリコーン感圧接着剤を所望により置き換えて利用可能である。
本発明の感圧接着層形成性オルガノポリシロキサン組成物は、その硬化により得られる感圧接着層の-20℃におけるせん断貯蔵弾性率G’が0.77~50.00MPaの範囲にあり、当該貯蔵弾性率G’が0.77~30.00MPaの範囲であってよく、0.81~30.00MPaの範囲であってよく、0.85~29.00MPaの範囲であるものも好適に本発明の範囲に含まれる。このような低温における貯蔵弾性率G’を有し、かつ、上記の実用的な粘着力を有することから、本発明における感圧接着層形成性オルガノポリシロキサン組成物は、弾性粘着部材の形成を目的として、スピーカー、トランスデューサー等の電子機器、電気的装置の部材として、また、スマートデバイス等の先端エレクトロニクス材料および表示素子分野への応用に適する。
本発明のオルガノポリシロキサン組成物は、実質的に透明、半透明または不透明のいずれであってもよく、当該感圧接着層の用途に応じてその透明性を設計することができる。例えば、表示装置用の感圧接着層として、本発明のオルガノポリシロキサン組成物を硬化させてなる厚さ10~1000μmのフィルム状の硬化物は、目視で透明であることが好ましく、カーボンブラック等の着色性の添加剤を含まないことが好ましい。なお、目視で透明である場合、より客観的には、厚み100μmの硬化層からなる表示装置用の感圧接着層の波長450nmの光の透過率が空気の値を100%とした場合に80%以上であり、好適には90%以上であり、95%以上に設計してもよい。一方、光透過性が求められない電気・電子部品の接着等においては、半透明~不透明な感圧接着層であってもよく、光透過性以外の要求特性に応じて、着色性あるいは光透過性を損なうようなフィラー成分または添加剤を利用しても良い。
(1)加熱エージング評価:硬化層を105℃-300時間エージングする
(2)高エネルギー線照射:硬化層に対し、365nmでの強度が12mW/cm2、254nmでの強度が3.5mW/cm2である水銀灯(例えば、ウシオ電機製Optical ModuleXなど)を用いた紫外光を、室温において試料上に75時間照射する
本発明の硬化物は、特に、感圧接着剤層として使用することができる。また、被着体との密着性を向上させるために、感圧接着剤層または基材の表面に対してプライマー処理、コロナ処理、エッチング処理、プラズマ処理等の表面処理を行ってもよい。ただし、本発明の感圧接着剤層は、上記のとおり、表示デバイス等の基材への密着性に優れることから、必要に応じ、これらの工程を加えてさらに被着体との密着性を向上させてもよく、これらの工程を省くことにより、より高い生産効率を実現してもよい。
本発明のオルガノポリシロキサン組成物を硬化してなる硬化物は、積層タッチスクリーン又はフラットパネルディスプレイの構築及び利用に使用することができ、その具体的な使用方法は、感圧接着剤層(特に、シリコーンPSA)の公知の使用方法を特に制限なく用いることができる。
表1に示す各成分を用いて、各実施例・比較例・参考例に示す硬化反応性のオルガノポリシロキサン組成物を調製した。なお、表1における%は全て質量%である。
Waters社製ゲルパーミエーションクロマトグラフィー(GPC)を用い、テトラヒドロフラン(THF)を溶媒として、標準ポリスチレン換算で、オルガノポリシロキサンレジン等のオルガノポリシロキサン成分の重量平均分子量(Mw)、数平均分子量(Mn)を求めた。
(オルガノポリシロキサンレジン中の水酸基(OH)含有量の測定)
ガラスフリープローブを備えたブルカー製ACP-30029Si NMRスペクトロメーターを用い、テトラメチルシランの化学シフトを0 ppmとしたときに、-93から-103.5 ppmに現れるSi(OH)O2/3単位の全シリコンに対する存在比率からモル含量を得、さらに、オルガノポリシロキサンレジン中の水酸基(OH)の質量%にも換算した。なお、以下の実施例におけるオルガノポリシロキサンレジン中に水酸基以外の加水分解性官能基は含まれていなかった。
(粘着力測定)
各組成物を、PETフィルム(株式会社東レ製、製品名ルミラー(登録商標)S10、厚さ50μm)に硬化後の厚みが50μmとなるように塗工し、150℃で3分間硬化させた。1日放置後、同試料を幅20mmに切断し、粘着層面をPMMA板(パルテック製、アクリライトL001,50x120x2mm)にローラーを用いて貼り合せて試験片とした。PMMA板を用いた試験片は、オリエンテック社製RTC-1210引っ張り試験機を用いてJIS Z0237に準じて180°引き剥がし試験方法を用いて引張速度300mm/minにて粘着力(20mm幅での測定を表示単位gf/インチに換算)を測定した。
(動的粘弾性:-20℃における貯蔵弾性率G’)
各組成物を硬化後の厚みが約100μmになるようにフロロシリコーン剥離コーティングを塗工した剥離ライナーに塗工し、150℃で3分間硬化させた。この感圧接着剤フィルムを5枚以上重ね合わせ、厚さ500μm以上である、両面を剥離ライナーに挟まれたフィルムサンプルを得た。当該フィルムを直径8mmにくりぬき、動的粘弾性装置(Anoton Paar社製、MCR301)のパラレルプレートプローブに貼り付けて、貯蔵弾性率G’を測定した。測定条件は、-70℃~200℃の範囲であり、周波数1Hz、昇温速度3℃/分にて測定し、損失係数、貯蔵弾性率G’、損失弾性率G’’を測定し、-20℃における貯蔵弾性率G’を記録した。
(引張試験)
上記の動的粘弾性試験用サンプルと同じようにして得た厚さ500μm以上である、両面を剥離ライナーに挟まれたフィルムサンプルを、幅約5mm、長さ約70mmに切断し、粘着剤表面にベビーパウダーを塗りながら剥離ライナーを剥がして、引張試験サンプルとした。引張試験は島津社製Autograph AGS-Xを用い、サンプルの上下約25mmを掴んで、300mm/分の速度で行った。応力およびひずみは各サンプルごとの正確なサンプルの幅と厚さ、クロスヘッド間距離から求めた。
[粘度]
粘度(mPa・s)は、JIS K7117-1に準拠した回転粘度計を使用して測定した値であり、動粘度(mm2/s)は、JIS Z8803に準拠したウベローデ型粘度計によって測定した値である。
[可塑度]
可塑度は、JIS K 6249に規定される方法に準じて測定された値(25℃、4.2gの球状試料に1kgfの荷重を3分間かけたときの厚さを1/100mmまで読み、この数値を100倍したもの)で示した。
成分aのビニル官能性ポリジメチルシロキサン32.9重量部、成分b1のMQシリコーン樹脂52.6重量部、成分b2のMQシリコーン樹脂44.4重量部、トルエン92.3重量部、成分c1の両末端トリメチルシロキシ基封鎖ジメチルシロキサン・メチルハイドロジェンシロキサン共重合体0.756重量部、成分eの硬化遅延剤20%溶液0.577重量部、を室温でよく混合し、混合物に成分d1の白金系ヒドロシリル化反応触媒0.484重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。成分a中のアルケニル基の量に対する成分c1中のSiH基のモル比(SiH/Vi比)は34.9、白金金属の固形分に対する含量は30ppmであった。
当該組成物を上記の方法で硬化させ、上記に示す方法によりPMMA板に対する粘着力、粘弾性、応力歪を測定し、その評価結果等を表2に示した。
成分aのビニル官能性ポリジメチルシロキサン32.2重量部、成分b1のMQシリコーン樹脂41.6重量部、成分b2のMQシリコーン樹脂54.7重量部、トルエン93.7重量部、成分c1の両末端トリメチルシロキシ基封鎖ジメチルシロキサン・メチルハイドロジェンシロキサン共重合体0.745重量部、成分eの硬化遅延剤20%溶液0.577重量部、を室温でよく混合し、混合物に成分d1の白金系ヒドロシリル化反応触媒0.484重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。成分a中のアルケニル基の量に対する成分c1中のSiH基のモル比(SiH/Vi比)は35.1、白金金属の固形分に対する含量は30ppmであった。
当該組成物を上記の方法で硬化させ、上記に示す方法によりPMMA板に対する粘着力、粘弾性、応力歪を測定し、その評価結果等を表2に示した。
成分aのビニル官能性ポリジメチルシロキサン31.6重量部、成分b1のMQシリコーン樹脂26.8重量部、成分b2のMQシリコーン樹脂68.0重量部、トルエン95.8重量部、成分c1の両末端トリメチルシロキシ基封鎖ジメチルシロキサン・メチルハイドロジェンシロキサン共重合体0.737重量部、成分eの硬化遅延剤20%溶液0.577重量部、を室温でよく混合し、混合物に成分d2の白金系ヒドロシリル化反応触媒0.577重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。成分a中のアルケニル基の量に対する成分c1中のSiH基のモル比(SiH/Vi比)は35.4、白金金属の固形分に対する含量は30ppmであった。
当該組成物を上記の方法で硬化させ、上記に示す方法によりPMMA板に対する粘着力、粘弾性、応力歪を測定し、その評価結果等を表2に示した。
成分aのビニル官能性ポリジメチルシロキサン34.7重量部、成分b1のMQシリコーン樹脂2.37重量部、成分b2のMQシリコーン樹脂84.5重量部、トルエン45.1重量部、成分c1の両末端トリメチルシロキシ基封鎖ジメチルシロキサン・メチルハイドロジェンシロキサン共重合体0.656重量部、成分eの硬化遅延剤20%溶液0.409重量部、を室温でよく混合し、混合物に成分d1の白金系ヒドロシリル化反応触媒0.355重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。(a)成分中のアルケニル基の量に対する(c1)成分中のSiH基のモル比(SiH/Vi比)は28.7、白金金属の固形分に対する含量は22ppmであった。
当該組成物を上記の方法で硬化させ、上記に示す方法によりPMMA板に対する粘着力、粘弾性、応力歪を測定し、その評価結果等を表2に示した。
次の組成を組むことができる。成分aのビニル官能性ポリジメチルシロキサン25.7重量部、成分a’の無官能性ポリジメチルシロキサン6.43重量部、成分b1のMQシリコーン樹脂41.6重量部、成分b2のMQシリコーン樹脂54.7重量部、トルエン38.2重量部、成分c1の両末端トリメチルシロキシ基封鎖ジメチルシロキサン・メチルハイドロジェンシロキサン共重合体0.582重量部、成分eの硬化遅延剤20%溶液0.577重量部、を室温でよく混合し、混合物に成分d1の白金系ヒドロシリル化反応触媒0.484重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。成分a中のアルケニル基の量に対する成分c1中のSiH基のモル比(SiH/Vi比)は34.4、白金金属の固形分に対する含量は30ppmであった。
成分aのビニル官能性ポリジメチルシロキサン49.0重量部、成分b1のMQシリコーン樹脂79.9重量部、トルエン93.3重量部、成分c1の両末端トリメチルシロキシ基封鎖ジメチルシロキサン・メチルハイドロジェンシロキサン共重合体0.919重量部、成分eの硬化遅延剤20%溶液0.577重量部、を室温でよく混合し、混合物に成分d1の白金系ヒドロシリル化反応触媒0.484重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。成分a中のアルケニル基の量に対する成分c1中のSiH基のモル比(SiH/Vi比)は28.4、白金金属の固形分に対する含量は30ppmであった。
当該組成物を上記の方法で硬化させ、上記に示す方法によりPMMA板に対する粘着力、粘弾性、応力歪を測定し、その評価結果等を表2に示した。
成分aのビニル官能性ポリジメチルシロキサン49.0重量部、成分b1のMQシリコーン樹脂79.9重量部、トルエン93.3重量部、成分c2の両末端トリメチルシロキシ基封鎖メチルハイドロジェンポリシロキサン0.433重量部、成分eの硬化遅延剤20%溶液0.577重量部、を室温でよく混合し、混合物に成分d1の白金系ヒドロシリル化反応触媒0.484重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。成分a中のアルケニル基の量に対する成分c2中のSiH基のモル比(SiH/Vi比)は28.4、白金金属の固形分に対する含量は30ppmであった。
当該組成物を上記の方法で硬化させ、上記に示す方法によりPMMA板に対する粘着力、粘弾性、応力歪を測定し、その評価結果等を表2に示した。
成分aのビニル官能性ポリジメチルシロキサン31.6重量部、成分b1のMQシリコーン樹脂26.8重量部、成分b2のMQシリコーン樹脂68.0重量部、トルエン95.8重量部、成分c1の両末端トリメチルシロキシ基封鎖ジメチルシロキサン・メチルハイドロジェンシロキサン共重合体0.737重量部、成分eの硬化遅延剤20%溶液0.577重量部、を室温でよく混合し、混合物に成分d2の白金系ヒドロシリル化反応触媒0.577重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。成分a中のアルケニル基の量に対する成分c1中のSiH基のモル比(SiH/Vi比)は35.4、白金金属の固形分に対する含量は30ppmであった。
当該組成物を上記の方法で硬化させ、上記に示す方法によりPMMA板に対する粘着力、粘弾性、応力歪を測定し、その評価結果等を表2に示した。
成分aのビニル官能性ポリジメチルシロキサン48.3重量部、成分b1のMQシリコーン樹脂81.0重量部、トルエン92.9重量部、成分c1の両末端トリメチルシロキシ基封鎖ジメチルシロキサン・メチルハイドロジェンシロキサン共重合体0.910重量部、成分eの硬化遅延剤20%溶液0.577重量部、を室温でよく混合し、混合物に成分d1の白金系ヒドロシリル化反応触媒0.484重量部を加えて硬化反応性のオルガノポリシロキサン組成物とした。成分a中のアルケニル基の量に対する成分c1中のSiH基のモル比(SiH/Vi比)は28.6、白金金属の固形分に対する含量は30ppmであった。
当該組成物を上記の方法で硬化させ、上記に示す方法によりPMMA板に対する粘着力、粘弾性、応力歪を測定し、その評価結果等を表2に示した。
Claims (11)
- (A)分子内に平均して1を超える数のアルケニル基を有する鎖状オルガノポリシロキサン、
(B)以下の(b1)成分および(b2)成分を1:99~99:1の質量比で含む、オルガノポリシロキサンレジン混合物:
(b1)分子内の全ケイ素原子に対する水酸基および加水分解性基の含有量の和が9モル%以下であり、ゲルパーミエーションクロマトグラフィー(GPC)により標準ポリスチレン換算で測定される重量平均分子量(Mw)が4500以上であるオルガノポリシロキサンレジン、
(b2)分子内の全ケイ素原子に対する水酸基および加水分解性基の含有量の和が9モル%以下であり、ゲルパーミエーションクロマトグラフィー(GPC)により標準ポリスチレン換算で測定される重量平均分子量(Mw)が4500未満であるオルガノポリシロキサンレジン
(C)分子内に少なくとも2個のSi-H結合を有するオルガノハイドロジェンポリシロキサン、および
(D)有効量のヒドロシリル化反応触媒
を含有してなり、(A)成分に対する(B)成分の質量比が0.9~3.0の範囲にあり、当該組成物の硬化により得られる感圧接着層の-20℃におけるせん断貯蔵弾性率G’が0.77~50.00MPaの範囲にある、感圧接着層形成性オルガノポリシロキサン組成物。 - 当該組成物の硬化により得られる厚み50μmの感圧接着層の、厚み2mmのポリメチルメタクリレートシートに対する、JIS Z 0237に従う180°引き剥がし試験方法を用いて引張速度300mm/minにより測定された粘着力が900~4000gf/inchの範囲であることを特徴とする、請求項1に記載の感圧接着層形成性オルガノポリシロキサン組成物。
- (A)成分の少なくとも一部が、(A1)25℃において100,000mPa・s以上の粘度を有するか、JIS K6249に規定される方法に準じて測定された可塑度が50~200の範囲にある生ゴム状のアルケニル基含有オルガノポリシロキサンであり、そのアルケニル基中のビニル(CH2=CH)部分の含有量が0.005~0.400質量%の範囲にある鎖状オルガノポリシロキサンであり、
(B)成分であるオルガノポリシロキサンレジン混合物が、R3SiO1/2単位(式中、Rは一価有機基であり、Rの90モル%以上が炭素数1~6のアルキル基またはフェニル基である;M単位)及びSiO4/2単位(Q単位)から実質的になるオルガノポリシロキサンレジン混合物であり
(C)成分の量が、上記の(A)成分中および(B)成分中のアルケニル基の物質量の和に対する(C)成分中のSiH基の物質量の比(モル比)が0.1~100となる量であり、
(D)成分の量が、組成物中の固形分中の白金系金属の含有量が0.1~200ppmの範囲である、請求項1または請求項2に記載の感圧接着層形成性オルガノポリシロキサン組成物。 - (C)成分の量が、上記の(A)成分中および(B)成分中のアルケニル基の物質量の和に対する(C)成分中のSiH基の物質量の比(モル比)が20~60となる量である請求項1~3のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物。
-
さらに、(A´)分子内に炭素-炭素二重結合含有反応性基を含まない鎖状オルガノポリシロキサンを含む、請求項1~4のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物 - 請求項1~5のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物を硬化してなる感圧接着剤層。
- フィルム状基材上に、請求項1~5のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物を硬化してなる感圧接着剤層を備えた積層体。
- 1または2以上のフィルム状基材に当該感圧接着剤層に対する剥離層が設けられている、請求項7に記載の積層体。
- フィルム状基材、
該フィルム状基材上に形成された第1剥離層、
該剥離層上に請求項1~5のいずれか1項に記載の感圧接着層形成性オルガノポリシロキサン組成物を塗工し硬化させて形成された感圧接着層、及び
該感圧接着層上に積層された第2剥離層
を含む、請求項7または請求項8の積層体。 - 請求項1~5のいずれか1項記載の感圧接着層形成性オルガノポリシロキサン組成物を硬化してなる、弾性粘着部材。
- 請求項10に記載の弾性粘着部材を含む電子機器または電気的装置。
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| US17/267,379 US12509614B2 (en) | 2018-08-10 | 2019-08-13 | Organopolysiloxane composition for forming pressure sensitive adhesive layer, and use of same |
| EP19846409.1A EP3835387A4 (en) | 2018-08-10 | 2019-08-13 | ORGANOPOLYSILOXA COMPOSITION FOR THE PREPARATION OF A COATING ADHESIVE AND USE THEREOF |
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- 2019-08-13 WO PCT/JP2019/031810 patent/WO2020032287A1/ja not_active Ceased
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- 2019-08-13 US US17/267,379 patent/US12509614B2/en active Active
- 2019-08-13 JP JP2020535942A patent/JP7046198B2/ja active Active
- 2019-08-13 CN CN201980058011.6A patent/CN112654687B/zh active Active
- 2019-08-13 KR KR1020217006971A patent/KR102532824B1/ko active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11987731B2 (en) | 2018-08-10 | 2024-05-21 | Dow Toray Co., Ltd. | Organopolysiloxane composition for forming pressure sensitive adhesive layer, and use of same |
| US12509614B2 (en) | 2018-08-10 | 2025-12-30 | Dow Toray Co., Ltd. | Organopolysiloxane composition for forming pressure sensitive adhesive layer, and use of same |
| US12173197B2 (en) | 2018-08-10 | 2024-12-24 | Dow Toray Co., Ltd. | Organopolysiloxane composition for forming pressure sensitive adhesive layer, and use of same |
| US12503626B2 (en) | 2019-08-13 | 2025-12-23 | Dow Toray Co., Ltd. | Organopolysiloxane composition for forming pressure sensitive adhesive layer and use of same |
| US12503630B2 (en) | 2019-08-13 | 2025-12-23 | Dow Toray Co., Ltd. | Organopolysiloxane composition having pressure-sensitive adhesive layer formation properties, and use of said composition |
| JP2022032150A (ja) * | 2020-08-11 | 2022-02-25 | 日本電産サンキョー株式会社 | アクチュエータの製造方法 |
| JPWO2022138913A1 (ja) * | 2020-12-25 | 2022-06-30 | ||
| WO2022138345A1 (ja) * | 2020-12-25 | 2022-06-30 | ダウ・東レ株式会社 | シリコーン粘着剤組成物およびその用途 |
| WO2022138913A1 (ja) * | 2020-12-25 | 2022-06-30 | ダウ・東レ株式会社 | 感圧接着層形成性オルガノポリシロキサン組成物、その使用およびその組成設計方法 |
| KR20240015655A (ko) | 2021-05-31 | 2024-02-05 | 다우 도레이 캄파니 리미티드 | 표시 장치, 특히 햅틱 표시 장치 및 그의 설계 방법 |
| WO2022255328A1 (ja) | 2021-05-31 | 2022-12-08 | ダウ・東レ株式会社 | 表示装置、特にハプティック表示装置およびその設計方法 |
| WO2023038147A1 (ja) * | 2021-09-13 | 2023-03-16 | 三菱ケミカル株式会社 | 粘着シート、粘着剤組成物、離型フィルム付き粘着シート、画像表示装置用積層体及びフレキシブル画像表示装置 |
| JP2023074699A (ja) * | 2021-11-18 | 2023-05-30 | 信越化学工業株式会社 | 熱伝導性シリコーン接着剤組成物及び熱伝導性複合体 |
| WO2023090049A1 (ja) * | 2021-11-18 | 2023-05-25 | 信越化学工業株式会社 | 熱伝導性シリコーン接着剤組成物及び熱伝導性複合体 |
| JP7624377B2 (ja) | 2021-11-18 | 2025-01-30 | 信越化学工業株式会社 | 熱伝導性シリコーン接着剤組成物及び熱伝導性複合体 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3835387A1 (en) | 2021-06-16 |
| CN112654687B (zh) | 2023-08-25 |
| KR20210042140A (ko) | 2021-04-16 |
| JPWO2020032287A1 (ja) | 2021-08-12 |
| JP7046198B2 (ja) | 2022-04-01 |
| CN112654687A (zh) | 2021-04-13 |
| EP3835387A4 (en) | 2022-05-18 |
| KR102532824B1 (ko) | 2023-05-17 |
| US12509614B2 (en) | 2025-12-30 |
| US20210292607A1 (en) | 2021-09-23 |
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