WO2020080349A1 - 硬化性シリコーン組成物及びその硬化物、積層体及びその製造方法、並びに光学装置又は光学ディスプレイ - Google Patents
硬化性シリコーン組成物及びその硬化物、積層体及びその製造方法、並びに光学装置又は光学ディスプレイ Download PDFInfo
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- WO2020080349A1 WO2020080349A1 PCT/JP2019/040431 JP2019040431W WO2020080349A1 WO 2020080349 A1 WO2020080349 A1 WO 2020080349A1 JP 2019040431 W JP2019040431 W JP 2019040431W WO 2020080349 A1 WO2020080349 A1 WO 2020080349A1
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- Prior art keywords
- curable silicone
- composition
- optical
- silicone composition
- group
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- BITPLIXHRASDQB-UHFFFAOYSA-N ethenyl-[ethenyl(dimethyl)silyl]oxy-dimethylsilane Chemical compound C=C[Si](C)(C)O[Si](C)(C)C=C BITPLIXHRASDQB-UHFFFAOYSA-N 0.000 description 4
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Images
Classifications
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- 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
- 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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- H01L33/00—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices having potential barriers specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
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- H01L24/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
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- H01L24/42—Wire connectors; Manufacturing methods related thereto
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Definitions
- the present invention relates to a curable silicone composition and a cured product thereof, a laminate and a manufacturing method thereof, and an optical device or an optical display.
- a curable silicone composition having high transparency and a large elongation of a cured product is used as an adhesive or a pressure-sensitive adhesive for improving the visibility of an optical display. Since it is necessary to use a heat-unstable material such as a display unit such as a liquid crystal and an organic EL or a display forming member such as a touch panel and a cover lens for the optical display, the curable silicone composition used is Those that cure at a relatively low temperature, specifically 40 ° C. or lower, are preferable, and ultraviolet curable silicone compositions have been mainly applied so far.
- Patent Document 1 a curable silicone composition comprising an organopolysiloxane containing an alkenyl group and an aryl group, an organopolysiloxane containing a silicon atom-bonded hydrogen atom, a compound having a polyalkylene oxide chain, and a platinum catalyst. Things have been proposed.
- the curing speed is slow, so that the bonding process at room temperature may be difficult.
- the curing rate itself can be accelerated by increasing the amount of the catalyst, the cured product obtained in that case is colored and cannot be used for an optical display or a touch panel.
- the adhesive strength and durability are insufficient depending on the application, and the optical member may peel off.
- curable silicone composition used for adhesives or pressure-sensitive adhesives for optical displays, touch panels, etc.
- a composition that exhibits excellent adhesive strength and durability after curing There has also been a demand for a composition that exhibits excellent adhesive strength and durability after curing.
- the present invention has been made to solve the above-mentioned problems of the prior art, and a curable silicone composition and a cured product thereof that exhibit excellent performance when used as a member requiring transparency such as an optical display or a touch panel,
- An object of the present invention is to provide a laminate, a method for manufacturing the same, and an optical device or optical display. Specifically, it is an object of the present invention to provide a curable silicone composition that can obtain a fast curing rate without increasing the amount of catalyst and can provide a cured product having excellent transparency. Moreover, it aims at providing the curable silicone composition from which the cured
- the content of the component (a2) is in the range of 0.5 to 10.0 mass% with respect to the sum of the components that form a nonvolatile solid content by the curing reaction of the curable silicone composition
- the content of the component (b2) is preferably in the range of 0.001 to 2.0 mass% with respect to the sum of the components forming a nonvolatile solid content by the curing reaction of the curable silicone composition.
- the curable silicone composition of the present invention preferably further contains (D) an organic compound having two or more alkoxysilyl groups in one molecule.
- the curable silicone composition of the present invention is i)
- the content of the polyether compound is 0.1% by mass or less based on the total amount of the curable silicone composition, and ii)
- the content of the compound having an epoxy group and an alkoxysilyl group is preferably 0.1% by mass or less based on the total amount of the curable silicone composition.
- the content of the component (D) is preferably in the range of 0.01 to 5 mass% with respect to the total amount of the curable silicone composition.
- the component (C) is (C1) A catalyst for hydrosilylation reaction which is active without irradiation of high energy rays, It is preferable to be selected from the group consisting of (c2) a catalyst for hydrosilylation reaction which is active upon irradiation with high energy rays, and a catalyst for hydrosilylation reaction which is a combination of components (c3) and (c1). .
- the high-energy rays refer to ultraviolet rays, gamma rays, X-rays, ⁇ -rays, electron rays, and the like, and ultraviolet rays, X-rays, and electron rays emitted from commercially available electron beam irradiation devices are preferable.
- ultraviolet rays in the wavelength range of 280 to 380 nm are conveniently used.
- the component (D) is (D1) It is preferable to include an organic compound having two or more alkoxysilyl groups at the end of the molecular chain.
- the viscosity of component (A) at 25 ° C. is preferably 100,000 mPa or less.
- the curable silicone composition of the present invention is preferably an optical adhesive or an optical adhesive.
- the present invention also relates to a cured product of the curable silicone composition of the present invention.
- the cured product of the curable silicone composition of the present invention preferably has a penetration of 5 to 70 at 25 ° C.
- the present invention also provides It also relates to a laminate comprising a first transparent or opaque optical member and a cured product layer made of the cured product of the present invention arranged between a second transparent or opaque optical member.
- the present invention provides Base material, An optical element arranged on the base material,
- the present invention also relates to an optical device provided with the cured product of the present invention for sealing at least a part of the optical element.
- the present invention provides A first substrate of any one of the first optical member or the first transparent protective member, A second substrate, which is one of the second optical member or the second transparent protective member;
- the present invention also relates to an optical display provided with a laminate including an adhesive layer made of the cured product of the present invention arranged between the first base material and the second base material.
- the present invention also provides The curable silicone composition containing at least a hydrosilylation catalyst which is active without irradiation of high energy rays of the present invention is disposed on one surface or both surfaces of at least one of the two optical members, and the two optical members are
- the present invention also relates to a method for producing a laminate, which includes a step of placing the curable silicone composition through the composition, and a step of curing the composition by allowing it to stand or be heated to cause a hydrosilylation reaction of the composition to proceed.
- the optical member constituting the laminated body of the present invention is generally provided with a plate-shaped portion having a planar spread, and the plate-shaped portion or the member itself may be curved. It may have three-dimensional unevenness derived from the use. Further, a cured product that is disposed on both surfaces of the optical member and is not used for bonding with another optical member can be used as an adhesive surface for joining to a release layer or another member.
- the present invention is characterized in that a curable silicone composition containing at least a hydrosilylation catalyst which is active upon irradiation with a high energy ray of the present invention is disposed on one surface or both surfaces of at least one of two optical members, A disposing step of adhering two optical members via the curable silicone composition, and a curing step of curing the composition by advancing a hydrosilylation reaction of the composition by irradiation with high energy rays, leaving or heating. Including, it also relates to a method for manufacturing a laminate.
- the present invention is characterized in that a curable silicone composition containing at least a hydrosilylation catalyst which is active upon irradiation with a high energy ray of the present invention is disposed on one surface or both surfaces of at least one of two optical members, After irradiating with energy rays to form a non-fluidic semi-cured state, an arrangement step of bonding the two optical members via the curable silicone composition in the semi-cured state, and leaving or heating the composition.
- the present invention also relates to a method for producing a laminate, which comprises a main curing step of proceeding a hydrosilylation reaction of the product to main cure the composition.
- the curable silicone composition containing both the hydrosilylation catalyst which is active without irradiation with high energy rays and the hydrosilylation catalyst which is active upon irradiation with high energy rays according to the present invention is at least one of two optical members. After being placed on one surface or both surfaces, the composition is left to stand or heated to cause a hydrosilylation reaction of the composition to form a non-fluidic semi-cured state in a low temperature region (15 to 80 ° C.) including room temperature (25 ° C.).
- the present invention also relates to production of a laminate, which comprises a main curing step of proceeding a hydrosilylation reaction of the product to main cure the composition.
- the present invention provides The curable silicone composition containing at least a hydrosilylation catalyst which is active without irradiation of high energy rays of the present invention is placed on one surface or both surfaces of at least one of the two optical members, and then left standing or heated.
- the composition is hydrosilylated to form a non-fluidic semi-cured state in a low temperature region (15 to 80 ° C.) including room temperature (25 ° C.), and then the two optical members are cured to the semi-cured state.
- a method for producing a laminate which includes: an arrangement step of laminating via a silicone composition; and a main curing step of leaving or heating the composition to proceed a hydrosilylation reaction of the composition in a semi-cured state to main-cure the composition. Also related to.
- the present invention provides in the method for producing a laminate, the method for producing a laminate, wherein the semi-cured curable silicone composition formed in the disposing step is a thermoplastic having fluidity at 100 ° C.
- the present invention provides The present invention also relates to a method for manufacturing a laminated body, wherein the laminated body is an optical device.
- the present invention provides It also relates to a method for producing a laminate, wherein the laminate is an optical display.
- the curable silicone composition of the present invention a sufficiently high curing rate can be obtained even when it is cured at room temperature, so that curing defects and the like in the bonding step do not occur, which is useful. Further, even after curing, problems such as coloring do not occur, a cured product with high transparency can be obtained, and since it has excellent adhesive strength and durability, when used as an adhesive or a pressure-sensitive adhesive for an optical display or a touch panel. It is useful.
- the cured product and laminate of the present invention do not cause a problem due to insufficient curing speed in the manufacturing process of an optical display or a touch panel. Further, it has excellent physical properties as an adhesive or pressure-sensitive adhesive, is optically transparent, and has excellent adhesive strength and durability. Therefore, the performance is not deteriorated even under conditions such as high temperature or high humidity, and the reliability is excellent.
- FIG. 1 is a cross-sectional view showing a Micro LED according to an embodiment of the present invention.
- FIG. 6 is a cross-sectional view showing a Micro LED according to another embodiment of the present invention.
- FIG. 3 is a cross-sectional view of a Micro LED in which red (R), green (G), and blue (B) light emitting elements are arranged in a set on a lead frame according to an embodiment of the present invention.
- the curable silicone composition of the present invention (hereinafter sometimes referred to as “the present composition”) will be described in detail.
- (A1) A straight-chain or partially-branched organopolysiloxane having at least two alkenyl groups having 2 to 12 carbon atoms in one molecule, and other groups bonded to a silicon atom in the component (a1). Is an alkyl group having 1 to 12 carbon atoms such as methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, heptyl group, octyl group, nonyl group, decyl group, undecyl group, and dodecyl group.
- An aralkyl group having 7 to 12 carbon atoms such as benzyl group and phenethyl group; a halogen-substituted alkyl group having 1 to 12 carbon atoms such as 3-chloropropyl group and 3,3,3-trifluoropropyl group, phenyl Groups, tolyl groups, xylyl groups, and other aryl groups having 6 to 20 carbon atoms; and some or all of the hydrogen atoms of these groups as fluorine, chlorine, and Is exemplified groups substituted with a halogen atom atom, such as, economic efficiency, in terms of heat resistance, a methyl group is preferable.
- the silicon atom in the component (a1) contains a methoxy group, an ethoxy group, an n-propoxy group, an i-propoxy group, an n-butoxy group, a sec-butoxy group, and a silicon atom within the range not impairing the object of the present invention.
- a small amount of an alkoxy group such as a tert-butoxy group or a hydroxyl group may be bonded.
- Examples of the component (a1) include dimethylpolysiloxane capped with dimethylvinylsiloxy groups at both ends of the molecular chain, dimethylpolysiloxane capped with diphenylvinylsiloxy groups at both ends of the molecular chain, dimethylsiloxane methylphenyl capped with dimethylvinylsiloxy groups at both ends of the molecular chain.
- Siloxane copolymer dimethylvinylsiloxy group-capped dimethylsiloxane / diphenylsiloxane copolymer at both molecular chain ends, Diphenylvinylsiloxy group-capped dimethylsiloxane / methylphenylsiloxane copolymer at both molecular chain ends, dimethylvinylsiloxy groups at both molecular chain ends Blocked dimethyl siloxane / methyl vinyl siloxane copolymer, molecular chain both ends dimethyl vinyl siloxy group blocked dimethyl siloxane / methyl phenyl siloxane / methyl vinyl siloxane copolymer, molecular chain both ends Methyl vinyl siloxy group-blocked dimethyl siloxane / diphenyl siloxane / methyl vinyl siloxane copolymer, molecular chain both ends trimethyl siloxy group blocked methyl vinyl polysiloxane, molecular chain both ends
- each R 1 is independently a monovalent hydrocarbon group having 1 to 12 carbon atoms, which is an alkyl group, an alkenyl group, an aryl group, an aralkyl group, or a hydrogen atom of these groups. Examples thereof include groups in which a part or all of them are substituted with a halogen atom such as a fluorine atom, a chlorine atom and a bromine atom. However, at least 1 mol% of R 1 is an alkenyl group having 2 to 12 carbon atoms.
- Examples of the component (a2) include tetrakis (dimethylvinylsiloxy) silane, hexa (dimethylvinylsiloxy) disiloxane, and organopolysiloxane resin represented by the following average unit formula: (ViMe 2 SiO 1/2 ) 0.1 (Me 3 SiO 1/2 ) 0.4 (SiO 4/2 ) 0.5 (ViMe 2 SiO 1/2 ) 0.1 (Me 3 SiO 1/2 ) 0.5 (SiO 4/2 ) 0.4 (ViMe 2 SiO 1/2 ) 0.05 (Me 3 SiO 1/2 ) 0.55 (SiO 4/2 ) 0.4 (ViMe 2 SiO 1/2 ) 0.1 (Me 3 SiO 1/2 ) 0.4 (PhSiO 3/2 ) 0.1 (SiO 4/2 ) 0.4 (ViMe 2 SiO 1/2 ) 0.046 (Me 3 SiO 1/2 ) 0.394 (SiO 4/2 ) 0.56 (V
- the content of the component (a2) is in the range of 0.5 to 10.0 mass% and preferably in the range of 1.0 to 5.0 mass% with respect to the solid content of the curable silicone composition.
- the solid content means the sum of the components that form a nonvolatile solid content by the curing reaction, and the components (A) to (D) and the nonvolatile optional component that compose the present composition. Is specifically included.
- the viscosity of the component (A) at 25 ° C. is not limited, it is preferably 100,000 mPa ⁇ s or less, 100 to 100,000 mPa ⁇ s, 100 to 50,000 mPa ⁇ s, or 100. Within the range of up to 10,000 mPa ⁇ s. This is because when the viscosity of the component (A) is at least the lower limit of the above range, the mechanical properties of the obtained cured product will be improved, while when it is at most the upper limit of the above range, the composition obtained will be This is because handling workability is improved.
- the component (b1) is a linear or partially branched organohydrogenpolysiloxane having a silicon-bonded hydrogen atom at the end of the molecular chain, which functions as a chain extender in the hydrosilylation reaction with the component (A) and cures. It is a component that improves the flexibility of the reaction product.
- Examples of the group bonded to a silicon atom other than the silicon-bonded hydrogen atom in the component (b1) include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, and a decyl group.
- Alkyl groups having 1 to 12 carbon atoms such as undecyl group and dodecyl group; aryl groups having 6 to 20 carbon atoms such as phenyl group, tolyl group and xylyl group; number of carbon atoms such as benzyl group and phenethyl group 7-20 aralkyl groups; halogen-substituted alkyl groups having 1-12 carbon atoms such as 3-chloropropyl group and 3,3,3-trifluoropropyl group are exemplified, and from the viewpoint of economical efficiency and heat resistance, A methyl group and a phenyl group are preferred.
- a methoxy group, an ethoxy group, an n-propoxy group, an i-propoxy group, an n-butoxy group, a sec-butoxy group and a tert group are contained within a range not impairing the object of the present invention.
- -A small amount of an alkoxy group such as butoxy group or a hydroxyl group may be bonded.
- component (b1) examples include, for example, 1,1,3,3-tetramethyldisiloxane, tris (dimethylhydrogensiloxy) methylsilane, bis (dimethylhydrogensiloxy) diphenylsilane.
- a dimethylpolysiloxane with a dimethylhydrogensiloxy group blocked at both ends of the molecular chain a dimethylhydrogensiloxy group blocked with a methylsilsesquioxane unit (T unit), a partially branched polydimethylsiloxane, a silica unit (Q unit) And a mixture of two or more of these organopolysiloxanes and a partially branched polydimethylsiloxane having a dimethylhydrogensiloxy group blocked at both ends of the molecular chain.
- each R 2 is independently a monovalent hydrocarbon group having 1 to 12 carbon atoms or a hydrogen atom excluding an alkenyl group, and an alkyl group, an aryl group, an aralkyl group, or a group thereof.
- a group in which a part or all of the hydrogen atoms of is substituted with a halogen atom such as a fluorine atom, a chlorine atom, and a bromine atom is exemplified.
- at least 1 mol% of R 2 is a hydrogen atom.
- Examples of such a component (b2) include tetrakis (dimethylhydrogensiloxy) silane, hexa (dimethylhydrogensiloxy) disiloxane, tris (dimethylhydrogensiloxy) phenylsilane, and an organo-organic compound represented by the following average unit formula.
- Polysiloxane resin (HMe 2 SiO 1/2 ) 0.6 (SiO 4/2 ) 0.4 (HMe 2 SiO 1/2 ) 0.3 (Me 3 SiO 1/2 ) 0.3 (SiO 4/2 ) 0.4 (HMe 2 SiO 1/2 ) 0.5 (Me 3 SiO 1/2 ) 0.05 (SiO 4/2 ) 0.4 (HMe 2 SiO 1/2 ) 0.5 (PhSiO 3/2 ) 0.1 (SiO 4/2 ) 0.4 (HMe 2 SiO 1/2 ) 0.6 (PhSiO 3/2 ) 0.4 (HMe 2 SiO 1/2 ) 0.75 (PhSiO 3/2 ) 0.25 Is exemplified. In the above formula, Me is a methyl group and Ph is a phenyl group.
- the component (C) is a catalyst for hydrosilylation reaction that accelerates curing of the present composition, and is a platinum-based catalyst, rhodium-based catalyst, palladium-based catalyst, nickel-based catalyst, iridium-based catalyst, ruthenium-based catalyst, and iron-based catalyst. Is preferred, and a platinum-based catalyst is preferred.
- the content of the component (C) is an amount that accelerates curing of the composition, and specifically, the platinum atom in the catalyst is 0.1 to 1,000 ppm in mass unit relative to the composition.
- the amount is within the range. This is because if the content of the component (C) is at least the lower limit of the above range, the curing of the resulting composition will proceed sufficiently, while if it is at most the upper limit of the above range, the obtained cured product will be. Is difficult to color.
- (C1) A catalyst for hydrosilylation reaction which is active without irradiation of high energy rays
- C2) A catalyst selected from the group consisting of a hydrosilylation reaction catalyst which is active upon irradiation with high energy rays, and a hydrosilylation reaction catalyst which is a combination of (c3) (c1) component and (c2) component.
- c3 c1 component and (c2) component.
- the component (c1) is a hydrosilylation reaction catalyst that is active without irradiation with high energy rays.
- the component (c1) is a hydrosilylation reaction catalyst for semi-curing the composition, and is a platinum-based catalyst, rhodium-based catalyst, palladium-based catalyst, nickel-based catalyst, iridium-based catalyst, ruthenium-based catalyst, and iron-based catalyst. Is preferred, and a platinum-based catalyst is preferred.
- platinum-based compounds such as platinum fine powder, platinum black, platinum-supported silica fine powder, platinum-supported activated carbon, chloroplatinic acid, alcohol solution of chloroplatinic acid, olefin complex of platinum, alkenylsiloxane complex of platinum, etc.
- platinum-based compounds such as platinum fine powder, platinum black, platinum-supported silica fine powder, platinum-supported activated carbon, chloroplatinic acid, alcohol solution of chloroplatinic acid, olefin complex of platinum, alkenylsiloxane complex of platinum, etc.
- an alkenylsiloxane complex of platinum 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, Examples thereof include alkenylsiloxanes in which a part of the methyl groups of these alkenylsiloxanes are substituted with ethyl groups, phenyl groups and the like, and alkenylsiloxanes in which the vinyl groups of these alkenylsiloxanes are substituted with allyl groups, hexenyl groups and the like.
- the component (c1) catalyst is a catalyst that exhibits activity without irradiation of high energy rays, but among them, those that exhibit activity even at relatively low temperatures are preferable. Specifically, in the composition in a temperature range of 0 to 200 ° C., preferably a temperature range of 0 to 150 ° C., more preferably a temperature range of 0 to 150 ° C., more preferably a temperature range of 20 to 150 ° C. It is active at and accelerates the hydrosilylation reaction.
- the content of the component (c1) varies depending on the type of catalyst and the type of composition, it is usually an amount such that the metal atom in the catalyst is in the range of 0.01 to 50 ppm in mass unit with respect to the composition.
- the composition of the present invention forms a semi-cured state or is not completely cured.
- the composition may be left at room temperature (25 ° C) or may be heated to room temperature or higher in the above temperature range.
- the curable silicone composition of the present invention may form a semi-cured state or a complete main-cured state in the relatively low temperature range of 15 to 80 ° C.
- “semi-cured state” means that the composition loses its fluidity in a low temperature region (15 to 80 ° C.) including room temperature (25 ° C.) as a result of the progress of the curing reaction, and is a cured reaction product. Although it is formed, the curing reaction product still maintains the curing reactivity, and by further setting the curing conditions such as continuous irradiation of high energy rays or leaving and heating, the curing reaction proceeds further.
- the curing reaction product in the semi-cured state is called "semi-cured product". Further, as a result of the progress of the curing reaction, the curing reaction of the composition is stopped and the curing reactivity is lost, and the state in which the curing reaction does not proceed any more is referred to as “main curing state”.
- the component (c2) is a catalyst for hydrosilylation reaction, which shows no activity without irradiation of high energy rays, but shows activity when irradiated with high energy rays.
- the component (c2) is a so-called high energy ray activating catalyst or photoactivating catalyst, and is known in the technical field of the present application.
- high energy rays examples include ultraviolet rays, gamma rays, X rays, ⁇ rays, and electron rays.
- ultraviolet rays, X-rays, and electron beams emitted from commercially available electron beam irradiation devices are mentioned.
- ultraviolet rays are preferable from the viewpoint of catalyst activation efficiency, and ultraviolet rays in the wavelength range of 280 to 380 nm are industrial. It is preferable from the viewpoint of practical use.
- the irradiation dose varies depending on the type of high energy ray activated catalyst, but in the case of ultraviolet rays, the integrated irradiation dose at a wavelength of 365 nm is preferably within the range of 100 mJ / cm 2 to 10 J / cm 2 .
- component (c2) include (methylcyclopentadienyl) trimethylplatinum (IV), (cyclopentadienyl) trimethylplatinum (IV), (1,2,3,4,5-pentamethylcyclopenta).
- Dienyl trimethylplatinum (IV), (cyclopentadienyl) dimethylethylplatinum (IV), (cyclopentadienyl) dimethylacetylplatinum (IV), (trimethylsilylcyclopentadienyl) trimethylplatinum (IV), (methoxy Carbonylcyclopentadienyl) trimethylplatinum (IV), (dimethylphenylsilylcyclopentadienyl) trimethylcyclopentadienylplatinum (IV), trimethyl (acetylacetonato) platinum (IV), trimethyl (3,5-heptanedio) Nate) platinum (IV), trimethyl (methylacetoa) Tate) platinum (IV), bis (2
- the content of the component (c2) is an amount necessary for further curing the composition semi-cured by the component (c1), and preferably the metal atom in the catalyst is contained in the mass relative to the composition.
- the amount is in the range of 1 to 50 ppm, preferably the amount is in the range of 5 to 30 ppm.
- the molar ratio ((c1) / (c2)) of the component (c1) and the component (c2) is usually 0.001 to 1000, preferably 0.01 to 100. This is because if the molar ratio is less than or equal to the upper limit, the curing reaction due to irradiation with high energy rays can be accelerated, and if the molar ratio is greater than or equal to the lower limit, the curing reaction can be performed at low temperature in a short time. Is.
- the curable silicone composition of the present invention preferably further contains (D) an organic compound having two or more alkoxysilyl groups in one molecule.
- the component (D) is a compound having two or more alkoxysilyl groups in one molecule, acts as an adhesion promoter for improving the adhesive strength of the composition, and the adhesive strength is significantly increased after a certain period of time. It is a component for exhibiting unique adhesion behavior.
- the alkoxysilyl group include a trimethoxysilyl group, a methyldimethoxysilyl group, a triethoxysilyl group, a methyldiethoxysilyl group, and a triisopropoxysilyl group.
- the component (D) contains (d1) an organic compound having two or three alkoxysilyl groups at the molecular chain terminals.
- the organic compound mentioned here includes an organosilicon compound in addition to an alkane compound and the like.
- Specific examples of the component (d1) include 1,2-bis (trimethoxysilyl) ethane, 1,2-bis (triethoxysilyl) ethane, 1,2-bis (methyldimethoxysilyl) ethane, 1,2- Bis (methyldiethoxysilyl) ethane, 1,3-bis (trimethoxysilyl) propane, 1,4-bis (trimethoxysilyl) butane, 1,4-bis (triethoxysilyl) butane, 1-methyldimethoxysilyl -4-trimethoxysilylbutane, 1-methyldiethoxysilyl-4-triethoxysilylbutane, 1,4-bis (methyldimethoxysilyl) butane, 1,4-bis (
- the content of the component (D) is not limited, but since it does not promote curing characteristics or discoloration of the cured product, it is 0.01 to 5 parts by mass based on 100 parts by mass of the total of the components (A) to (C). Or in the range of 0.01 to 3 parts by mass.
- the curable silicone composition of the present invention preferably has a polyether compound content of 0.1% by mass or less based on the total amount of the curable silicone composition. This is because when the content of the polyether compound is 0.1% by mass or less, a cured product having high transparency can be obtained.
- the polyether compound is a polyether compound having a hydroxyl group, an alkoxy group, or an acyloxy group at the terminal, and the main chain polyether structure includes polyoxyethylene, polyoxypropylene, and polyoxybutylene.
- a polyether has the general formula: XO- (C 2 H 4 O) p (C n H 2n O) q (YO) r -X It is a polyoxyalkylene compound represented by.
- X is the same or different, and is a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, an alkenyl group having 2 to 12 carbon atoms, an aryl group having 6 to 20 carbon atoms, an acyl group having 1 to 12 carbon atoms, It is an acrylic group or a methacrylic group.
- alkyl group of X examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, an undecyl group, and a dodecyl group.
- alkenyl group for X include vinyl group, allyl group, 2-methyl-2-propen-1-yl group (so-called methallyl group), 3-buten-1-yl group, 3-methyl-3-butene.
- Examples thereof include 1-yl group, 4-buten-1-yl group, 5-penten-1-yl group, 4-vinylphenyl group and 4- (1-methylvinyl) phenyl group.
- the aryl group of X is a phenyl group, an o-methylphenyl group, a p-methylphenyl group, an o-phenylphenyl group (so-called o-biphenyl group), a p-phenylphenyl group (so-called p-biphenyl group). ), And p-nonylphenyl group.
- Y is a divalent hydrocarbon group having 2 to 20 carbon atoms, and specifically, ethylene group, propylene group, butylene group, pentylene group, neopentylene group, hexylene group, 1,4- Examples thereof include a phenylene group, a 2-methyl-1,4-phenylene group, a 2-phenyl-1,4-phenylene group, and a 4,4 '-(propane-2,2-diyl) diphenyl group.
- n is an integer of 3 to 6.
- p is an integer satisfying 2 ⁇ p ⁇ 100, preferably 2 ⁇ p ⁇ 75, or 2 ⁇ p ⁇ 50.
- q is an integer satisfying 0 ⁇ q ⁇ 50, preferably 0 ⁇ q ⁇ 30 or 2 ⁇ q ⁇ 30.
- r is 0 or 1.
- Such a polyoxyalkylene compound is a polyoxyalkylene compound represented by the above general formula, which is a single compound or a mixture of two or more compounds.
- the unit represented by the formula: C 2 H 4 O, the unit represented by the formula: C n H 2n O, and the unit represented by the formula: YO are randomly linked. Or may be connected in blocks.
- Examples of such polyoxyalkylene compounds include the following compounds.
- Me represents a methyl group
- X 1 , X 2 , X 3 , X 4 , and X 5 represent a methyl group, an allyl group, a methallyl group, an acryl group, and a hydrogen atom, respectively
- p is p.
- An integer of 2 to 100 and q is an integer of 1 to 50. It should be noted that any of the units may be randomly connected, or may be connected in blocks.
- the content of the compound having an epoxy group and an alkoxysilyl group is preferably 0.1% by mass or less based on the total amount of the curable silicone composition. This is because when the content of the compound having an epoxy group and an alkoxysilyl group is 0.1% by mass or less, a cured product having high transparency can be obtained. This is because the polyether compound essentially absorbs water, and thus turbidity due to water is generated in the composition over time, which impairs permanent transparency.
- Examples of compounds having an epoxy group and an alkoxysilyl group include 3-glycidoxypropyltrimethoxysilane, 3-glycidoxypropylmethyldimethoxysilane, 3-glycidoxypropyltriethoxysilane, and 3-glycidoxypropylmethyldimethoxysilane.
- Examples include ethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethylmethyldimethoxysilane, and 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane.
- the composition may also contain a hydrosilylation reaction retarder in order to control the time to cure.
- This hydrosilylation reaction retarder includes 1-ethynylcyclohexan-1-ol, 2-methyl-3-butyn-2-ol, 3,5-dimethyl-1-hexyne-3-ol, 2-phenyl- Alkyne alcohols such as 3-butyn-2-ol; Enyne compounds such as 3-methyl-3-penten-1-yne and 3,5-dimethyl-3-hexen-1-yne; 1,3,5,7- Methylalkenylsiloxane oligomers such as tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane, 1,3,5,7-tetramethyl-1,3,5,7-tetrahexenylcyclotetrasiloxane; dimethylbis Alkyneoxysilanes such as (3-methyl-1-butyne-3-oxy) silane and methylvin
- the content of the hydrosilylation reaction retarder is not limited, and since it gives the composition a sufficient pot life, 0.0001 to 5 is added to 100 parts by weight of the total of the components (A) to (D). It is preferably within the range of 0.01 parts by mass, within the range of 0.01 to 5 parts by mass, or within the range of 0.01 to 3 parts by mass. However, when the composition is left to cure or semi-cure at room temperature without being heated / irradiated with high energy rays, a hydrosilylation reaction retarder may not be contained and it is preferable from the viewpoint of curing reaction.
- fine powder of metal oxide such as fumed silica and wet silica; 1,1,3,3-tetramethyl-1,3 -Divinyldisiloxane, 1,3,5,7-tetramethyl-1,3,5,7-tetravinylcyclotetrasiloxane, etc.
- the composition may preferably contain a non-reactive organopolysiloxane as a plasticizer or a viscosity modifier for the cured product.
- a non-reactive organopolysiloxane as a plasticizer or a viscosity modifier for the cured product.
- Specific examples thereof include linear or branched organopolysiloxanes and organopolysiloxane resins that do not contain a functional group such as an alkenyl group.
- the hardness (penetration) and the fluidity (viscosity) in the cured state or the semi-cured state can be adjusted to desired ranges.
- the viscosity of this composition at 25 ° C. is not limited, but it is preferably 100,000 mPa ⁇ s or less, in the range of 200 to 100,000 mPa ⁇ s, or in the range of 500 to 30,000 mPa ⁇ s. This is because when the viscosity of the present composition is at least the lower limit of the above range, the resulting cured product has good mechanical properties, while when it is at most the upper limit of the above range, handling of the resulting composition This is because workability is good and it becomes difficult for air to be entrapped in the cured product. In addition, these viscosities can be measured by a rotational viscometer.
- the composition can be prepared by uniformly mixing the components (A) to (D) and, if necessary, other optional components.
- the composition can be mixed at room temperature using various stirrers or kneaders, and if necessary, may be mixed under heating.
- the order of mixing the components is not limited, and the components can be mixed in any order.
- composition may be a one-pack composition in which all components are mixed in the same container, or in consideration of storage stability, a two-pack composition may be mixed at the time of use. It is possible.
- the composition can be cured in a relatively low temperature range including room temperature (for example, a range of 15 to 80 ° C.).
- the curing reaction of the present composition can be adjusted to a desired rate by the concentration of the catalyst metal in the component (C) and the type and content of the hydrosilylation reaction retarder described above.
- the present composition is useful as various potting agents, sealing agents, and adhesives, and is particularly useful as an optical adhesive / adhesive for displays.
- the cured product is less colored at high temperatures or under high temperature and high humidity, and is less likely to cause turbidity, and thus is suitable as a material for forming an intermediate layer between the image display section and the protective section of the display.
- this composition cures at a relatively low temperature, it can also be applied to the coating of substrates with poor heat resistance.
- the type of such a substrate is generally a transparent substrate such as glass, synthetic resin film / sheet / transparent electrode coating film.
- Examples of the coating method of the present composition include dispensing, gravure coating, microgravure coating, slit coating, slot die coating, screen printing, stencil printing, and comma coating.
- the cured product of the present invention is characterized by being obtained by curing the above curable silicone composition.
- the shape of the main cured product is not limited, and examples thereof include a sheet shape, a film shape, a tape shape, and a lump shape. Further, it may be integrated with various base materials.
- the composition is preferably cured to form an elastomer (elastic body) resin member or a gel resin member, and the cured silicone resin member has a needle defined by JIS K2220 at 25 ° C.
- the penetration (hereinafter, simply referred to as “penetration”) is preferably in the range of 5 to 70, more preferably in the range of 10 to 60, and more preferably in the range of 20 to 50. Since such a silicone resin member has appropriate flexibility and durability and is excellent in adhesiveness / adhesion retention and followability between members, it can be reliably used as a gap sealant composition for a display device. It is possible to realize a remarkable effect of the eye-catching.
- Examples of the method for forming the present cured product include a hydrosilylation reaction by coating the composition on a film-shaped substrate, a tape-shaped substrate, or a sheet-shaped substrate, and then irradiating with high energy rays, leaving at room temperature or heating at low temperature. And curing can be promoted. Further, when the present composition is placed between two substrates and cured to firmly bond the two substrates, and when at least one surface of the substrate is coated with the composition smoothly, After curing and non-fluidizing, there is a case where both base materials are attached to each other and further cured to firmly bond them.
- the film thickness of the cured product is not limited, but is preferably 1 to 100,000 ⁇ m, and more preferably 50 to 30,000 ⁇ m.
- FIG. 1 is a cross-sectional view showing a laminated body of an embodiment of the present invention.
- the laminated body 1 of the embodiment of the present invention includes a first optical member 20, a second optical member 21, and an adhesive layer 15 formed between the two optical members 20 and 21 and made of a main cured product. Is equipped with.
- the two optical members 20 and 21 are adhered by the adhesive layer 15.
- These optical members may be transparent or opaque, and one or both of the optical members may be a single base material, or may be an independent laminated body such as a backlight unit. It may be an optical member.
- the optical member constituting the laminated body of the present invention is generally provided with a plate-shaped portion having a planar spread, and the plate-shaped portion or the member itself may be curved. It may have three-dimensional unevenness derived from the use.
- the first optical member 20 is a first base material
- the second optical member 21 is a second base material.
- the two optical members 20, 21 can be arbitrarily combined.
- the two optical members 20 and 21 may be the same as or different from each other.
- the optical members 20 and 21 are generally used as constituent members of an optical display. More specifically, the optical members 20 and 21 are, for example, lenses (which may be made of resin or glass), optical sheet-shaped members (color filters, polarizing plates, retardation plates, viewing angle widening films, brightness enhancement).
- an optical protective material may be further provided on the surface of the display panel or the touch panel.
- the optical member may be a backlight unit itself including a light emitting layer and a display surface (display panel) described below, or a component in a display device such as a component or a touch panel, in which the entire optical member is an independent laminated member.
- the optical member may further include an adhesive layer 15 made of the main cured product. That is, the concept of the optical member includes an image display panel, an optical panel, a front panel, a backlight unit, a touch panel unit, etc., which will be described later.
- the materials of the optical members 20 and 21 are not particularly limited as long as they are generally used for the above-mentioned applications, but are inorganic optical materials such as glass and indium tin oxide (ITO), or polycarbonate resin. , Acrylic resin, epoxy resin, polystyrene resin, polyamide resin, polyimide resin, polyethylene resin, polypropylene resin, polyvinyl chloride resin, polyvinylidene chloride resin, polyvinyl alcohol (PVA) resin, polyethylene terephthalate (PET) resin, cyclopolyolefin resin,
- the organic optical material include polyether ether ketone resin, polyethylene naphthalate (PEN) resin, liquid crystal polyarylate resin, polyamide imide resin, polyether sulfone resin, and mixtures thereof.
- it may be a polyimide resin, a polyether ether ketone resin, a polyethylene naphthalate (PEN) resin, a liquid crystal polyarylate resin, a polyamide imide resin, a polyether sulfone resin or a mixture thereof.
- PEN polyethylene naphthalate
- polypropylene resin polystyrene resin, polyvinylidene chloride resin, PVA resin, polycarbonate resin, PET resin, PEN resin, or a mixture thereof may be used.
- the optical members 20 and 21 may be subjected to a surface treatment generally performed as a constituent member of an optical display.
- the surface treatment may be, for example, a primer treatment or a corona treatment.
- the two optical members may peel off at the bonding interface due to the difference in the coefficient of thermal expansion between the two optical members.
- the present adhesive layer has flexibility, it is possible to reduce the influence of the difference in coefficient of thermal expansion, and it is possible to favorably bond the two optical members 20 and 21 different from each other. Therefore, the present adhesive phase is suitably used for adhering different optical members, particularly for adhering an organic material and an inorganic material having a large thermal expansion coefficient difference.
- the laminated body 1 shown in FIG. 1 includes two optical members, but the number of optical members is not particularly limited as long as it includes a plurality of optical members.
- the adhesive layer 15 shown in FIG. 1 is formed between the two optical members 20 and 21 as a whole, but may be formed in a part between the two optical members 20 and 21.
- the adhesive layer 15 shown in FIG. 2 is formed between the two optical members 20 and 21, it may be formed on the surface 20b opposite to the adhesive surface 20a of the optical member 20. It may be formed on the surface 21a opposite to the adhesive surface 21b of 21 or on both surfaces 20b and 21a.
- FIG. 2 is a flowchart showing a method for manufacturing a laminated body according to the embodiment of the present invention.
- at least the above (c1) curable silicone composition containing at least a hydrosilylation catalyst that exhibits activity without irradiation with high energy rays is used as at least one of two optical members. Arrangement on one surface or both surfaces of one member, and the step of adhering the two optical members via the curable silicone composition and the adhering step S1, and leaving or heating to proceed the hydrosilylation reaction of the composition. And a curing step S2 for curing the composition.
- the composition is arranged on the member by using, for example, the above-mentioned coating method.
- the composition may be arranged on one surface of one of the optical members.
- a cured product that is disposed on both sides of the optical member and is not used for bonding with another optical member may be used as an adhesive surface for joining to a peeling layer or another member.
- the composition may be arranged on one surface of each of the two optical members in the arrangement step S1.
- the “one surface” is the surface facing the other optical member.
- the composition in the disposing step S1, may be disposed on the other surface located on the opposite side to the one surface.
- the present composition is cured in a low temperature region (15 to 80 ° C.) including room temperature (25 ° C.).
- “low temperature” refers to a temperature range of 15 ° C. to 80 ° C., for example.
- room temperature a temperature range that can be reached without heating or cooling, 20 to 25 ° C.
- the composition may be left to stand, cooled to room temperature or lower and 15 ° C. or higher, or heated to room temperature or higher and 80 ° C. or lower.
- At least one of two optical members comprises the above-mentioned curable silicone composition (c2) containing at least a hydrosilylation catalyst active by irradiation with high energy rays.
- high energy rays are irradiated. Thereby, a main cured product obtained by curing the present composition is obtained.
- the high energy rays are those mentioned above, and are preferably ultraviolet rays.
- FIG. 3 is a flowchart showing a method for manufacturing a laminated body according to still another embodiment of the present invention.
- a method for manufacturing a laminate according to still another embodiment of the present invention includes the following steps. Step i): The step (c2) of arranging the curable silicone composition containing at least a hydrosilylation catalyst active by irradiation with a high energy beam on one surface or both surfaces of at least one of the two optical members.
- Step ii) Step S21 of irradiating the composition arranged in Step i) with high energy rays to bring the composition into a non-flowable semi-cured state
- Step iii) After Step ii), Step S3 in which the two optical members are bonded together via the curable silicone composition in a semi-cured state.
- the composition is irradiated with high energy rays.
- a semi-cured product that has undergone the hydrosilylation reaction is obtained.
- the semi-cured product is allowed to undergo a curing reaction in the temperature range of 15 to 80 ° C. to be fully cured. As a result, a main cured product obtained by further curing the semi-cured product is obtained.
- the manufacturing method of the laminated body in the further embodiment of the present invention has the following steps.
- the reaction of the composition is allowed to proceed in the temperature range of 15 to 80 ° C. As a result, a semi-cured product that has undergone the hydrosilylation reaction is obtained.
- the semi-cured product is irradiated with high energy rays. As a result, a main cured product obtained by further curing the semi-cured product is obtained.
- Step S22 A step of disposing the above-mentioned curable silicone composition containing at least
- the reaction of the composition is allowed to proceed in the temperature range of 15 to 80 ° C. As a result, a semi-cured product that has undergone the hydrosilylation reaction is obtained.
- the semi-cured product is further cured in the temperature range of 15 to 80 ° C. to be fully cured. As a result, a main cured product obtained by further curing the semi-cured product is obtained.
- An optical device includes a base material, an optical element disposed on the base material, and a book that seals at least a part of the optical element. And a cured product.
- the optical device is, for example, an optical semiconductor device.
- the optical semiconductor device include a light emitting diode (LED), a photo coupler, and a CCD.
- a light emitting diode (LED) element and a solid-state imaging element are illustrated as an optical semiconductor element.
- the curable silicone composition of the present invention can be preferably used. .
- the refractive index of the cured product may be adjusted as desired by selecting the type of the functional group such as the content of the aryl group.
- the curable silicone composition of the present invention is excellent in heat resistance and moisture resistance, it is unlikely to cause a decrease in transparency and turbidity. Therefore, there is an advantage that the light extraction efficiency of the optical semiconductor device including the Micro LED can be favorably maintained.
- FIG. 4 is a plan view showing the Micro LED according to the embodiment of the present invention.
- FIG. 5 is a sectional view showing a Micro LED according to the embodiment of the present invention.
- LED elements (optical elements) 101 in 4 rows and 4 columns are die-bonded onto a lead frame (base material) 102, respectively, and the LED elements 101 and the lead frame 102 are bonded to each other by a bonding wire 104 ( Wire bonding is performed by (not shown in FIG. 4).
- a frame material 105 is provided around these LED elements 101, and the LED elements 101 inside the frame material 105 are sealed with a main cured product 106.
- the LED elements of 4 rows and 4 columns are sealed in the main cured product, but the number and arrangement of the LED elements are not limited to this.
- the curable silicone composition according to the embodiment of the present invention can be applied as a sealing material in a single surface mount LED.
- FIG. 6 is a sectional view showing a Micro LED 100A according to another embodiment of the present invention.
- the LED element 101 is arranged on the substrate 102.
- the LED element 101 may be arranged on the substrate 102 optionally via an adhesive layer.
- the LED element 101 is sealed with a main cured product 106.
- the substrate 102 may optionally include electrodes, and other optical elements or members may be arranged on the surface and inside of the substrate 102.
- the surface layer 103 is arranged on the opposite side of the substrate 102 with respect to the main cured product 106.
- the surface layer 103 is a transparent layer such as glass or PET which may be a multilayer, and may have a transparent adhesive layer inside.
- the transparent adhesive layer may be a main cured product.
- FIG. 7 is a cross-sectional view of the Micro LED 100B in which the red (R), green (G), and blue (B) light emitting elements are arranged in a set on the lead frame according to the embodiment of the present invention.
- the red (R), green (G), and blue (B) light emitting elements are arranged in a set on the lead frame according to the embodiment of the present invention.
- three types of light emitting semiconductor (LED) elements 101R, 101G, and 101B corresponding to the three primary colors of light, red (R), green (G), and blue (B) are read as a set. It can be placed on the frame 102 and sealed with the main cured product 106 with or without a frame material.
- LED light emitting semiconductor
- the manufacturing method of the present optical device is The composition is subjected to a hydrosilylation reaction by heating the composition, and then the composition after heating is arranged on the optical element arranged on the substrate. Including any one of heating steps of arranging the present composition on an optical element and then heating the present composition to obtain a composition in which a hydrosilylation reaction has proceeded, It further includes a curing step of irradiating with high energy rays to cure the composition after heating.
- a composition in which the hydrosilylation reaction has proceeded is obtained by leaving the present composition in a low temperature region (15 to 80 ° C.) including room temperature instead of heating it.
- the composition can also be placed on an optical element placed on the substrate.
- the four LED elements 101 are die-bonded to the lead frame 102, respectively, and the LED elements 101 and the lead frame 102 are respectively bonded by the gold bonding wires 104. Wire bond.
- the present composition After filling (arranging) the present composition inside the frame material 105 provided around the four LED elements 101, it is cured by leaving it at 0 to 200 ° C. In another embodiment of the present invention, after the composition is left at 0 to 200 ° C., the composition is placed inside the frame member 105 provided around the LED element 101.
- the LED 100 in which the four LED elements 101 are sealed with the main cured product 106 can be obtained.
- FIG. 8 is a sectional view showing the optical display according to the embodiment of the present invention.
- An optical display 200 according to an embodiment of the present invention includes the above-mentioned laminated body 1 and an image display panel 201.
- the laminate 1 and the image display panel 201 are adhered to each other via an adhesive layer (not shown).
- This adhesive layer may be composed of the main cured product.
- the second optical member 21 of the laminated body 1 is in contact with the adhesive layer.
- the first optical member 20 of the laminated body 1 may be a polarizing film and the second optical member 21 may be a retardation film.
- the 1st optical member 20 of the laminated body 1 can be a polarizing film
- the 2nd optical member 21 can be a surface protection film, for example.
- the image display panel 201 is not particularly limited as long as it displays image information.
- a liquid crystal display LCD
- a polarizing film a retardation film
- a color filter a viewing angle widening film
- a brightness a brightness.
- An improvement film an optical film such as a reflection sheet, a liquid crystal material, a transparent substrate and a backlight system (usually, the pressure-sensitive adhesive component or the pressure-sensitive adhesive layer adheres to the image display panel is the optical film)
- the STN method, the VA method, the IPS method, and the like are available depending on the control method of the liquid crystal material, but any method may be used.
- the image display panel 201 may be an in-cell type in which a touch panel function is built in the TFT-LCD or an on-cell type in which a touch panel function is built in between a glass substrate provided with a polarizing plate and a color filter.
- the image display panel 201 is composed of an organic EL element substrate or a laminate of the organic EL element substrate and other optical films and the like.
- the optical display 200 may be a cathode ray tube (CRT) display or a flat panel display (FPD).
- FPD for example, a light receiving display device such as an LCD or an electrochromic display (ECD), or an electroluminescent display (ELD) such as an organic EL display or an inorganic EL display, a plasma display (PDP), a surface conduction electron-emitting device.
- a field emission display (FED) such as a display (SED) and a light emitting display device such as an LED display can be mentioned.
- FIG. 9 is a sectional view showing an optical display according to another embodiment of the present invention.
- An optical display 300A according to another embodiment of the present invention includes an image display panel 301, an optical member 20, and an adhesive layer 15 made of a main cured product and disposed between the image display panel 301 and the optical member 20. I have it.
- the image display panel 301 is a first member, and the optical member 20 is a second member.
- the image display panel 301 may be the one exemplified as the image display panel 201.
- the optical member 20 is arranged on one surface 301a of the image display panel 301 via a composition layer composed of the present composition, and then the composition layer is semi-cured in a temperature range of 15 to 80 ° C. And further irradiating the composition layer with high energy rays to cure the composition layer.
- the semi-curing process in the temperature range of 15 to 80 ° C may be replaced by irradiation with high energy rays, and the process of irradiating with high energy rays and curing may be a process of curing in the temperature range of 15 to 80 ° C.
- the optical member 20 is imaged. It can be obtained by arranging it on one surface 301a of the display panel 301 via a semi-cured composition layer and further irradiating the composition layer with a high energy ray to cure the composition layer.
- the semi-curing process in the temperature range of 15 to 80 ° C. may be replaced by irradiation with high energy rays, and the process of irradiating with high energy rays to cure is a process of curing in the temperature range of 15 to 80 ° C. Can be replaced with
- FIG. 10 is a sectional view showing an optical display according to another embodiment of the present invention.
- An optical display 300B according to another embodiment of the present invention includes an image display panel 301, a touch panel 302, an image display panel 301, and an adhesive layer 15 made of a main cured product and arranged between the image display panel 301 and the touch panel 302. ing.
- the touch panel 302 is not particularly limited, and may be a resistive film type, an electrostatic capacitance type, an electromagnetic induction type, or a combination thereof.
- the touch panel 302 preferably includes at least one cover film, a transparent electrode layer such as an ITO or ATO film, or a glass substrate.
- the touch panel may further include a decorative film or the like.
- the curable silicone composition of the present invention is cured between a display unit such as a liquid crystal / organic EL and a display forming member such as a touch panel or a cover lens, or between display forming members. Visibility of an optical display can be improved by adhering or sticking with an object.
- the image display surface of the display may be flat (flat), curved or curved.
- the optical display according to the embodiment of the present invention is, for example, a communication device such as a mobile phone or a fixed telephone; a computer device such as a tablet terminal, a desktop terminal, a notebook type terminal; a TV; a printer; an ATM (automatic teller machine); Monitor or navigation system; digital camera; video camera; medical device; PDA (mobile terminal); watch; electronic paper; CD, DVD or Blue-ray disc player; solid electronic recording medium player such as SSM or HD; electronic book Equipment: Playing equipment such as portable game equipment and fixed game equipment; POS system; fish finder; automatic ticket vending machine; instrument panel etc.
- a communication device such as a mobile phone or a fixed telephone
- a computer device such as a tablet terminal, a desktop terminal, a notebook type terminal
- TV a printer
- an ATM automated teller machine
- Monitor or navigation system digital camera
- video camera video camera
- medical device PDA (mobile terminal); watch
- electronic paper CD, DVD or Blue-ray disc player
- solid electronic recording medium player such as
- the optical display according to the embodiment of the present invention has, in addition to the above configuration, any one first member of the first optical member, the image display panel or the first touch panel, and the second optical member, It may be provided with any one second member of the transparent protective member and the second touch panel, and an adhesive layer made of the main cured product, which is disposed between the first member and the second member. .
- a frame-shaped resin member that is, a so-called dam material is formed on the display module, and an optical elastic resin (hereinafter referred to as "OCR (Optically Clear Resin)" is applied to the inside of the display module, and a front panel is applied from above. It can be pasted.
- OCR optical elastic resin
- the curable silicone composition according to the present invention may be injected and filled by using a dispenser such as a syringe or a cartridge depending on a site to be injected or arranged, and the OCR may be arranged.
- the dam material may be provided only on a part of the display module, or the dam material may not be provided at all. Good.
- the OCR coating step (in the case of optical bonding) required for manufacturing a display device having a front panel, the bonding step, and the like are not limited to the above-mentioned reduced pressure environment, and are well known in the atmospheric pressure environment.
- a method of arranging them in parallel and filling the OCR between the gaps may be used.
- a typical method for manufacturing the optical display of the present invention is, for example, the dam-fill method. Specifically, a dam material is dispensed on an organic optical resin such as glass or polycarbonate used as a cover lens in a width of 1 mm or less according to the shape of the display, and cured by various methods. After that, the curable silicone composition of the present invention is dispensed, the image display panels are bonded together, and the silicone composition is cured by heating at a relatively low temperature (for example, 40 ° C.) to produce an optical display. Can be mentioned.
- a relatively low temperature for example, 40 ° C.
- dam material it is possible to use a thixotropic UV-curable, room-temperature-curable, or heat-curable liquid material. Considering high resistance to thermal shock (so-called thermal cycle), an ultraviolet-curable silicone material can be preferably used.
- the optical display of the present invention since it rapidly cures at a relatively low temperature, specifically at a temperature of 40 ° C. or lower, deformation and deterioration of a heat-labile material, and further exposure to high temperature and high humidity. Even if it is done, turbidity or coloring is unlikely to occur in the cured product, so that the reliability of the optical display can be improved.
- the optical display of the embodiment of the present invention further comprises Further comprising a shield substrate provided on a surface of the front panel facing the display surface, the shield substrate having a surface on which a transparent conductive film is formed,
- the display device may have a structure in which the transparent conductive film and the bezel are electrically connected via a conductive material.
- a shield substrate such as an Electro-Magnetic Interference (EMI) substrate having a conductive layer on one side can be inserted between the display module and the front panel. Since such a shield substrate has an electromagnetic wave shielding function, it prevents the front panel from malfunctioning due to electromagnetic waves emitted from the display module. Further, a conductive layer made of a transparent conductive film such as ITO is formed on one surface of the shield substrate uniformly or in a mesh shape. Then, in order to set the potential of the conductive layer to the GND of the display module, the adhesive member or the like arranged on the outer periphery of the bezel can be formed of a conductive adhesive member such as Ag paste.
- EMI Electro-Magnetic Interference
- the bezel of the display module is made of metal and is GND-connected inside the display module.
- the adhesive member is made of a conductive material, the metal bezel and the conductive layer of the shield substrate can be surely GND-connected, so that a display device having a strong electromagnetic wave resistance can be provided.
- FIG. 11 is an exploded perspective view showing an optical display according to another embodiment of the present invention.
- 12 is a partial sectional view showing an optical display according to another embodiment of the present invention, and is a partial sectional view of the optical display shown in FIG. 11.
- a display device 400 (optical display) according to the present invention includes a display panel 110 having a display surface 111, a frame portion 121, and an opening end 122 inside the frame portion 121.
- a bezel 120 that covers the periphery of the display panel 110 on the display surface 111 side with a frame portion 121, a front panel 130 provided on the display surface 111 side of the display panel 110 with the bezel 120 interposed therebetween, and an open end of the bezel 120.
- a resin member 140 that fills a gap 172 formed in the overlapping portion of the bezel 120 and the display surface 111 in the direction perpendicular to the display surface 111 without a gap, and the display surface 111 and the front surface.
- an OCR 150 filled between the panel 130 and the panel 130.
- the display surface 111 refers to the entire surface of the display panel 110 on the front panel 130 side.
- the display module 110 is configured by mounting the display panel 110 on the backlight unit 171, and fixing the bezel 120 and the backlight unit 171 by a fitting structure (not shown). The entire surface of the display module 170 and the front panel 130 such as a touch panel are bonded together via the OCR 150.
- the curable silicone composition of the present invention can be applied to the inner layer of the front panel 130, the OCR 150, the resin member 140 under the bezel, and the like. Note that the curable silicone composition of the present invention can be used for joining and filling each member shown in FIGS. 11 and 12 or between each member, without being limited to these applications.
- 13 to 15 are partial cross-sectional views showing an optical display according to another embodiment of the present invention. 13 to 15 are diagrams corresponding to FIG.
- a dam (resin member) 140 is further provided on the bezel 120 shown in FIG. 12, and a space 173 with the front panel 130 is filled with an OCR 150 made of a cured product, which is a so-called two-layer structure.
- OCR 150 made of a cured product
- the bezel 120 shown in FIGS. 11 to 13 is not essential.
- the partial cross-sectional view shown in FIG. 14 shows a structure in which the bezel 120 is not arranged, the dam 140 is provided on the backlight unit 170A, and the space 173 with the front panel 130 is filled with the OCR 150 made of the main cured product. Has been done.
- the partial cross-sectional view shown in FIG. 14 shows a structure in which the space 173 between the front panel 130 and the front panel 130 is filled with an OCR 150 made of a main cured product, that is, a so-called damless structure, without providing the bezel 120 and the dam 140.
- the structure shown in FIG. 14 can be realized by non-fluidizing the composition when it is semi-cured.
- the display device is preferably a display device having a structure in which a space between the display surface and the front panel is filled with a substantially transparent optically elastic resin member or an optical gel resin member.
- a substantially transparent optically elastic resin member or an optical gel resin member By using such an optical elastic resin member or an optical gel resin member as an OCR for optical bonding, it is possible to improve the display performance and durability of the display device and provide a highly reliable display device.
- Such an OCR is preferably formed by curing a curable resin composition, and has the above-mentioned physical properties such as penetration, shear adhesive strength, and maximum adhesive strength, which are related to the ratio of displacement to sample thickness.
- a silicone resin cured product (member) formed by photocuring including light irradiation is exemplified.
- this composition can obtain a fast curing rate without increasing the amount of catalyst. Therefore, it is considered that the effects of the present invention are likely to be exerted in the production of a laminate having a multilayer structure, an optical device, and an optical display.
- a cured product with excellent transparency can be obtained.
- a display device of a type that does not have a bezel that covers the periphery of the display surface side of the display panel with a frame portion it is considered that the transparency of OCR has a great influence on the display quality. Therefore, it can be suitably used for a display device of a type that does not have such a bezel.
- problems such as coloring are unlikely to occur even after curing, it can be suitably used for applications such as color displays, projectors, organic EL, etc. that require coloring / coloring.
- this composition provides a cured product with excellent adhesive strength and durability. Therefore, a highly reliable laminated body, an optical device, and an optical display can be provided.
- the present invention has been described with reference to the above embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be added to the configuration and details of the present invention. Further, the present invention also includes a combination of some or all of the configurations of the above-described respective embodiments with each other as appropriate.
- the present invention is not limited to this, and the same applies to the case of a heat-curing type, a moisture-curing type, or a composite curing type of these. The effect of is obtained.
- a further dam material is provided outside the silicone resin member that fills the gap between the bezel and the display panel as a dam material, and a part of the gap or It does not prevent the adoption of a structure that blocks everything. For example, if a special shape is used for part of the bezel in design and the gap cannot be completely closed even with the above method, the curable resin composition that is a dam material should be pinpointed at the location. You may inject things.
- the front panel has a quadrangular shape
- it does not have to be a quadrangle, and may be an arbitrary polygon, a flat plate having a curved portion, or a combination thereof. It doesn't matter.
- the curable silicone composition of the present invention can obtain a sufficiently high curing rate even when cured at room temperature, it can be suitably used in a laminating step in the production of optical displays and touch panels. Further, since the cured product has high transparency and excellent adhesive strength, it can be suitably used for optical displays and touch panels. Furthermore, as described above, the image display surface of the display may be flat (planar), or may have a curved surface or a curved shape.
- the curable silicone composition of the present invention has excellent curability in that it has a sufficiently high curing rate even when cured at room temperature, has sufficient adhesive strength, and is transparent even when exposed to high temperature and high humidity. It is useful as an adhesive or pressure-sensitive adhesive for use in display devices (including touch panels) such as optical displays and optical semiconductor devices (including MicroLED), since it forms a cured product that maintains turbidity and coloration. .
- the curable silicone composition of the present invention is not limited to optical displays and the like and can be used without limitation for bonding or filling transparent members.
- solar cells double-layer glass (smart glass), and optical waveguides. It can be used for an adhesive layer such as a waveguide and a projector lens (multi-layer type lens, polarization / optical film bonding).
- the curable silicone composition of the present invention since the curable silicone composition of the present invention has a small curing shrinkage of the cured product, it has a general advantage of the silicone OCR that it can suppress display defects such as defects of a display or an optical member and unevenness of images. Have.
- the curable silicone composition of the present invention since the curable silicone composition of the present invention has the above-mentioned soft properties, it has high conformability to an adhesive member and exhibits a strong adhesive force after a certain period of time. From this, the curable silicone composition of the present invention effectively suppresses peeling between members, and is an optical device such as an in-vehicle display having a flat display surface or a curved display surface, and a head-up display using the above projector lens. It can be suitably used for the adhesive layer.
- Viscosity of Organopolysiloxane and Curable Silicone Composition The viscosity (mPa ⁇ s) at 25 ° C. was measured using a rotational viscometer (E-type viscometer VISCONIC EMD manufactured by Tokimec Co., Ltd.).
- a curable silicone composition having a thickness of 10 mm or more is left to cure in a petri dish at 25 ° C. for 48 hours to be cured, and then the penetration at 25 ° C. is measured using a penetration measuring device (RPM-201 manufactured by Sogo Co., Ltd.). Was measured.
- the gelling time was defined as the time when the loss tangent reached 1 in the viscoelasticity measurement of the curable silicone composition at 25 ° C.
- a curable silicone composition was filled between two glass plates (length 75 mm ⁇ width 25 mm ⁇ thickness 2 mm) such that the cured silicone cured product had a dimension of length 25 mm ⁇ width 25 mm ⁇ thickness 200 ⁇ m.
- the composition was cured by heating at room temperature for 48 hours to prepare a test body composed of a cured product sandwiched between two glass plates. This test body was subjected to a shear adhesion test according to the method specified in JIS K6850 to measure the adhesive strength.
- Examples 1 to 7, Comparative Examples 1 to 6 A curable silicone composition having the composition (parts by mass) shown in Table 1 was prepared using the following components.
- Me is a methyl group
- Vi is a vinyl group
- Ph is a phenyl group
- Ep is an epoxy group.
- Component (B) The following components were used as the components (b1) and (b2).
- b1-1 HMe 2 SiO (SiMe 2 O) 24 OSiMe 2 H
- b2-1 (HMe 2 SiO 1/2 ) 0.63 (SiO 4/2 ) 0.37
- b2-2 (HMe 2 SiO 1/2 ) 0.75 (PhSiO 3/2 ) 0.25
- c1-1 Platinum 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex
- c2-1 (Methylcyclopentadienyl) trimethylplatinum (IV)
- d1-1 1,6-bis (trimethoxysilyl) hexane
- d1-2 1,3-bis (trimethoxysilylethyl) tetramethyldisiloxane
- Optional component-1 Me 3 SiO (SiMe 2 O) 450 (SiMePhO) 40 OSiMe 3
- Table 1-1 Composition of curable silicone composition (Examples 1 to 7) * After irradiating ultraviolet rays of wavelength 365 nm at 2 J / cm 2 , left at 25 ° C.
- Table 1-2 Composition of curable silicone composition (Comparative Examples 1 to 6)
- Examples 1 to 7 Examples in which the component A of the present invention ⁇ (a1), (a2) component ⁇ and the B component ⁇ (b1), (b2) component ⁇ are used in combination to satisfy the constitution of the present invention
- a fast curing rate could be obtained without increasing the amount of catalyst, and a cured product (flexible elastomer to gel, etc.) having excellent transparency and adhesive strength could be obtained.
- Example 5 even when a photoreactive hydrosilylation catalyst was used, similar technical effects were exhibited.
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Abstract
Description
(A)以下の(a1)成分及び(a2)成分:
(a1)一分子中に少なくとも2個の炭素原子数2~12のアルケニル基を有する直鎖状又は分岐鎖状オルガノポリシロキサン
(a2)平均単位式:(R1 3SiO1/2)a(R1 2SiO2/2)b(R1SiO3/2)c(SiO4/2)d(式中、R1はそれぞれ独立に炭素原子数1~12の一価炭化水素基であり、R1の少なくとも1モル%は炭素原子数2~12のアルケニル基であり、a、b、c及びdは次の条件を全て満たす:a+b+c+d=1、a+b+c+d=1、0≦a≦0.8、0≦b≦0.4、0≦c≦0.8、0≦d≦0.6、0.2≦c+d≦0.8)で表される、アルケニル基を有するオルガノポリシロキサン
を含む、アルケニル基を有するオルガノポリシロキサン、
(B)以下の(b1)成分及び(b2)成分:
(b1)分子鎖末端にケイ素結合水素原子を有する直鎖状又は分岐鎖状オルガノハイドロジェンポリシロキサン
(b2)平均単位式:(R2 3SiO1/2)e(R2 2SiO2/2)f(R2SiO3/2)g(SiO4/2)h(式中、R2はそれぞれ独立にアルケニル基を除く炭素原子数1~12の一価炭化水素基又は水素原子であり、R2の少なくとも1モル%は水素原子であり、e、f、g及びhは次の条件を全て満たす:e+f+g+h=1、0≦e≦0.8、0≦f≦0.4、0≦g≦0.7、0≦h≦0.5、0.2≦g+h≦0.7)で表される、オルガノハイドロジェンポリシロキサン
を含む、オルガノハイドロジェンポリシロキサン、並びに
(C)ヒドロシリル化反応用触媒
を含む、硬化性シリコーン組成物であって、
(B)成分の含有量は、(A)成分中の脂肪族不飽和炭素-炭素結合1モルに対して、(B)成分中のケイ素結合水素原子が0.5~2モルとなる量である、硬化性シリコーン組成物によって達成される。
(b2)成分の含有量が、硬化性シリコーン組成物の硬化反応により不揮発性の固形分を形成する成分の和に対して0.001~2.0質量%の範囲であることが好ましい。
i)ポリエーテル化合物の含有量が、硬化性シリコーン組成物の合計量に対して0.1質量%以下であり、かつ、
ii)エポキシ基及びアルコキシシリル基を有する化合物の含有量が、硬化性シリコーン組成物の合計量に対して0.1質量%以下であることが好ましい。
(c1)高エネルギー線の照射なしで活性を示すヒドロシリル化反応用触媒、
(c2)高エネルギー線の照射により活性を示すヒドロシリル化反応用触媒、及び
(c3)(c1)成分と(c2)成分の組み合わせであるヒドロシリル化反応用触媒
からなる群から選択されることが好ましい。
(d1)分子鎖末端に2個以上のアルコキシシリル基を有する有機化合物を含むことが好ましい。
第1の透明または不透明な光学部材と、第2の透明または不透明な光学部材との間に配置された本発明の硬化物からなる硬化物層と、を備える積層体にも関する。
基材と、
前記基材に配置された光学素子と、
前記光学素子の少なくとも一部を封止する本発明の硬化物と、を備える光学装置にも関する。
第1の光学部材又は第1の透明保護部材のいずれか1つの第1の基材と、
第2の光学部材又は第2の透明保護部材のいずれか1つの第2の基材と、
前記第1の基材と前記第2の基材との間に配置された本発明の硬化物からなる接着層と、を備える積層体、を備える光学ディスプレイにも関する。
本発明の高エネルギー線の照射なしで活性を示すヒドロシリル化触媒を少なくとも含有する硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置し、前記二つの光学部材を前記硬化性シリコーン組成物を介して貼り合わせる配置工程、及び放置若しくは加熱して前記組成物のヒドロシリル化反応を進行させて前記組成物を硬化させる硬化工程を含む、積層体の製造方法にも関する。なお、本発明の積層体を構成する光学部材は、平面状の広がりを有する板状部分を備えていることが一般的であり、当該板状部位または部材自身が湾曲していてもよく、部材の用途に由来する三次元的な凹凸を備えていてもよい。また、光学部材の両面に配置された硬化物であって他の光学部材との貼り合わせに使用されない硬化物は、接着面として剥離層や他の部材への接合に用いることができる。
高エネルギー線照射、放置若しくは加熱して前記組成物のヒドロシリル化反応を進行させて前記組成物を硬化させる硬化工程を含む、積層体の製造方法にも関する。
本発明の高エネルギー線の照射なしで活性を示すヒドロシリル化触媒と高エネルギー線の照射により活性を示すヒドロシリル化触媒の両方を含有する硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置した後に、放置若しくは加熱して前記組成物のヒドロシリル化反応させて室温(25℃)を含む低温領域(15~80℃)で非流動性の半硬化状態を形成した後、前記二つの光学部材を半硬化状態の前記硬化性シリコーン組成物を介して貼り合わせる配置工程、及び透明基材を通して高エネルギー線照射を行った後に、放置若しくは加熱して半硬化状態の前記組成物のヒドロシリル化反応を進行させて前記組成物を本硬化させる本硬化工程を含む、積層体の製造にも関する。
本発明の高エネルギー線の照射なしで活性を示すヒドロシリル化触媒を少なくとも含有する硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置した後、放置若しくは加熱して前記組成物のヒドロシリル化反応させて室温(25℃)を含む低温領域(15~80℃)で非流動性の半硬化状態を形成した後、前記二つの光学部材を半硬化状態の前記硬化性シリコーン組成物を介して貼り合わせる配置工程、及び放置若しくは加熱して半硬化状態の前記組成物のヒドロシリル化反応を進行させて前記組成物を本硬化させる本硬化工程を含む、積層体の製造方法にも関する。
前記積層体の製造方法において、配置工程で形成される半硬化状態の前記硬化性シリコーン組成物が100℃で流動性を有する熱可塑体である、積層体の製造方法にも関する。
積層体が光学装置である、積層体の製造方法にも関する。
積層体が光学ディスプレイである、積層体の製造方法にも関する。
以下、まずは本発明の硬化性シリコーン組成物(以下、「本組成物」と称することがある。)について詳細に説明する。
(a1)一分子中に少なくとも2個の炭素原子数2~12のアルケニル基を有する直鎖状または部分分岐状オルガノポリシロキサン
(a2)平均単位式:(R1 3SiO1/2)a(R1 2SiO2/2)b(R1SiO3/2)c(SiO4/2)d(式中、R1はそれぞれ独立に炭素原子数1~12の一価炭化水素基であり、R1の少なくとも1モル%は炭素原子数2~12のアルケニル基であり、a、b、c及びdは次の条件を全て満たす:a+b+c+d=1、a+b+c+d=1、0≦a≦0.8、0≦b≦0.4、0≦c≦0.8、0≦d≦0.6、0.2≦c+d≦0.8)で表される、アルケニル基を有するオルガノポリシロキサン
を含む。
(ViMe2SiO1/2)0.1(Me3SiO1/2)0.4(SiO4/2)0.5
(ViMe2SiO1/2)0.1(Me3SiO1/2)0.5(SiO4/2)0.4
(ViMe2SiO1/2)0.05(Me3SiO1/2)0.55(SiO4/2)0.4
(ViMe2SiO1/2)0.1(Me3SiO1/2)0.4(PhSiO3/2)0.1(SiO4/2)0.4
(ViMe2SiO1/2)0.046(Me3SiO1/2)0.394(SiO4/2)0.56
(ViMe2SiO1/2)0.25(PhSiO3/2)0.75
が例示される。なお、上式中Meはメチル基であり、Phはフェニル基であり、Viはビニル基である。
(b1)分子鎖末端にケイ素結合水素原子を有する直鎖状または部分分岐状オルガノハイドロジェンポリシロキサン
(b2)平均単位式:(R2 3SiO1/2)e(R2 2SiO2/2)f(R2SiO3/2)g(SiO4/2)h(式中、R2はそれぞれ独立にアルケニル基を除く炭素原子数1~12の一価炭化水素基又は水素原子であり、R2の少なくとも1モル%は水素原子であり、e、f、g及びhは次の条件を全て満たす:e+f+g+h=1、0≦e≦0.8、0≦f≦0.4、0≦g≦0.7、0≦h≦0.5、0.2≦g+h≦0.7)で表される、オルガノハイドロジェンポリシロキサン
を含む。
(HMe2SiO1/2)0.6(SiO4/2)0.4
(HMe2SiO1/2)0.3(Me3SiO1/2)0.3(SiO4/2)0.4
(HMe2SiO1/2)0.5(Me3SiO1/2)0.05(SiO4/2)0.4
(HMe2SiO1/2)0.5(PhSiO3/2)0.1(SiO4/2)0.4
(HMe2SiO1/2)0.6(PhSiO3/2)0.4
(HMe2SiO1/2)0.75(PhSiO3/2)0.25
が例示される。なお、上式中Meはメチル基であり、Phはフェニル基である。
(c1)高エネルギー線の照射なしで活性を示すヒドロシリル化反応用触媒、
(c2)高エネルギー線の照射により活性を示すヒドロシリル化反応用触媒、及び
(c3)(c1)成分と(c2)成分の組み合わせであるヒドロシリル化反応用触媒
からなる群から選択されるものを使用することが好ましい。
また、3個のアルコキシシリル基を有する有機化合物としては、1,3,5-トリス{2-(トリメトキシシリル)エチル}-1,1,3,5 ,5-ペンタメチルトリシロキサン、1,3,5-トリス{2-(メチルジメトキシシリル)エチル}-1,1,3,5,5-テトラメチルジシロキサン、1,3,5-トリス{2-(トリエトキシシシリル)エチル}-1,1,3,5,5-テトラメチルジシロキサン、1,3,5-トリス{2-(メチルジエトキシシリル)エチル}-1,1,3,5,5-テトラメチルジシロキサン、1,3,5-トリス{6-(トリメトキシシリル)ヘキシル}-1,1,3,5,5-テトラメチルジシロキサン等の3個のアルコキシシリル基を有するトリシロキサン化合物が挙げられる。その構造の一例は、
(MeO)3SiCH2CH2(Me)2Si-O-SiMe(CH2CH2Si(OMe)3)-O-Si(Me)2CH2CH2Si(OMe)3
である(上式中、Meはメチル基である)。
XO-(C2H4O)p(CnH2nO)q(YO)r-X
で表されるポリオキシアルキレン化合物である。
X2O(C2H4O)p[CH2CH(Me)O]qX2
X3O(C2H4O)p[CH2CH(Me)O]qX3
X4O(C2H4O)p[CH2CH(Me)O]qX4
X2O(C2H4O)p[CH2CH(Me)O]qX1
X3O(C2H4O)p[CH2CH(Me)O]qX1
X4O(C2H4O)p[CH2CH(Me)O]qX1
X5O(C2H4O)p[CH2CH(Me)O]qX1
X5O(C2H4O)p[CH2CH(Me)O]qX2
X5O(C2H4O)p[CH2CH(Me)O]qX4
X2O(C2H4O)pX2
X3O(C2H4O)pX3
X4O(C2H4O)pX4
X2O(C2H4O)pX1
X3O(C2H4O)pX1
X4O(C2H4O)pX1
X5O(C2H4O)pX1
X5O(C2H4O)pX2
X5O(C2H4O)pX4
X2O(C2H4O)p-p-C6H4-C9H19
X3O(C2H4O)p-p-C6H4-C9H19
X4O(C2H4O)p-p-C6H4-C9H19
X2O(C2H4O)p-C6H5
X3O(C2H4O)p-C6H5
X4O(C2H4O)p-C6H5
X2O(C2H4O)p-p-C6H4-CMe2-p-C6H4-O(C2H4O)pX2
X3O(C2H4O)p-p-C6H4-CMe2-p-C6H4-O(C2H4O)pX3
X4O(C2H4O)p-p-C6H4-CMe2-p-C6H4-O(C2H4O)pX4
次に、本発明の硬化物について詳細に説明する。
図1は、本発明の実施形態の積層体を示す断面図である。本発明の実施形態の積層体1は、第1の光学部材20と、第2の光学部材21と、2つの光学部材20、21の間に配置された本硬化物からなる接着層15と、を備えている。積層体1では、2つの光学部材20、21が接着層15により接着されている。これらの光学部材は透明であっても、不透明であってもよく、一方又は両方の光学部材が、単独の基材であってもよく、バックライトユニットのようにそれ自体が独立した積層体である光学部材であってもよい。なお、本発明の積層体を構成する光学部材は、平面状の広がりを有する板状部分を備えていることが一般的であり、当該板状部位または部材自身が湾曲していてもよく、部材の用途に由来する三次元的な凹凸を備えていてもよい。
光学部材20、21は、光学ディスプレイの構成部材として一般的に使用されるものである。より具体的には、光学部材20、21は、例えば、レンズ(樹脂製又はガラス製であってよい)、光学シート状部材(カラーフィルタ、偏光板、位相差板、視野角拡大フィルム、輝度向上フィルム、反射シート、透明導電性フィルムを含む)、透明であってもよい光学保護材(透明保護材(透明保護フィルム)等であり、ガラス製、樹脂製又は樹脂コーティング層)、前面表示パネル、タッチパネル(ガラス製又は樹脂製)、ITO又はATO膜等の透明電極層であり得る。いうまでもなく、表示パネル又はタッチパネル表面には、光学保護材をさらに備えてもよい。また、光学部材は、後述する発光層及び表示面(表示パネル)を含むバックライトユニットそれ自体であってもよく、光学部材全体が独立した積層部材からなる部品又はタッチパネル等の表示装置内のモジュールであってもよく、当該光学部材内に、本硬化物からなる接着層15をさらに有していてもよい。すなわち、光学部材の概念には、後述する画像表示パネル、光学パネル、前面パネル、バックライトユニット、タッチパネルユニット等が、包含される。
工程i):前記(c2)高エネルギー線の照射により活性を示すヒドロシリル化触媒を少なくとも含有する上記の硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置する工程S1
工程ii):工程i)で配置された前記組成物に高エネルギー線照射を行い、当該組成物を非流動性の半硬化状態にする工程S21
工程iii):工程ii)の後、前記二つの光学部材を半硬化状態の前記硬化性シリコーン組成物を介して貼り合わせる工程S3
工程iv):工程iii)で貼り合わせた前記二つの光学部材を、15~80℃の温度範囲で前記組成物のヒドロシリル化反応を進行させ、前記組成物を本硬化させる工程S22
工程i):前記(c1)高エネルギー線の照射なしで活性を示すヒドロシリル化触媒と、前記(c2)の高エネルギー線の照射により活性を示すヒドロシリル化触媒との両方を含有する上記の硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置する工程S1であって、少なくとも一方の部材として透明な光学部材を用いる工程
工程ii):工程i)で配置された前記組成物を室温で放置若しくは加熱して前記組成物のヒドロシリル化反応を進行させ、当該組成物を非流動性の半硬化状態にする工程S21
工程iii):工程ii)の後、前記二つの光学部材を半硬化状態の前記硬化性シリコーン組成物を介して貼り合わせる工程S3
工程iv):工程iii)で貼り合わせた前記二つの光学部材について、前記透明な光学部材を通して、前記硬化性シリコーン組成物に高エネルギー線照射を行った後、15~80℃の温度範囲で半硬化状態の前記組成物のヒドロシリル化反応を進行させ、前記組成物を本硬化させる工程S22
工程i):(c1)高エネルギー線の照射なしで活性を示すヒドロシリル化触媒を少なくとも含有する上記の硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置する工程S1
工程ii):工程i)で配置された前記組成物を15~80℃の温度範囲で前記組成物のヒドロシリル化反応を進行させ、当該組成物を非流動性の半硬化状態にする工程S21
工程iii):工程ii)の後、前記二つの光学部材を半硬化状態の前記硬化性シリコーン組成物を介して貼り合わせる工程S3
工程iv):工程iii)で貼り合わせた前記二つの光学部材を、さらに、15~80℃の温度範囲で半硬化状態の前記組成物のヒドロシリル化反応を進行させ、前記組成物を本硬化させる工程S22
本発明の実施形態の光学装置(以下、「本光学装置」と称することがある。)は、基材と、基材に配置された光学素子と、光学素子の少なくとも一部を封止する本硬化物と、を備えている。
本組成物を加熱することによりヒドロシリル化反応を進行させた組成物を得てから基材に配置された光学素子上に加熱後の組成物を配置する配置工程S1、又は
基材に配置された光学素子上に本組成物を配置してから本組成物を加熱することによりヒドロシリル化反応を進行させた組成物を得る加熱工程のいずれか1つを含み、
高エネルギー線を照射して加熱後の組成物を硬化させる硬化工程をさらに含む。
図8は、本発明の実施形態の光学ディスプレイを示す断面図である。本発明の実施形態の光学ディスプレイ200は、上記の積層体1と、画像表示パネル201と、を備えている。
必要に応じて、表示モジュールに枠状に樹脂部材、いわゆるダム材を形成し、その内側に光学弾性樹脂(以下「OCR(Optically Clear Resin)」という。)を塗布し、その上から前面パネルを貼り合せることができる。また、注入ないし配置する部位に応じて、シリンジ、カートリッジ等のディスペンサーを用いて、本発明にかかる硬化性シリコーン組成物を注入して充填し、OCRを配置してもよい。さらに、表示モジュールの構造およびOCRの粘度及び塗布形態に応じて、ダム材を表示モジュールの一部のみに設けてもよく、まったく設けない構造、いわゆるダムレス構造として、OCRによる貼り合わせを行ってもよい。
前記前面パネルの前記表示面に対向する面に設けられ、透明導電膜が形成された面を有するシールド基板をさらに備え、
前記透明導電膜と前記ベゼルとが導電性材料を介して電気的に接続された構造を備えた表示装置であってよい。
当該表示装置は、前記表示面と前面パネルとの間が実質的に透明な光学弾性体樹脂部材又は光学ゲル状樹脂部材により充填された構造を備えた表示装置であることが好ましい。このような光学弾性体樹脂部材又は光学ゲル状樹脂部材をOCRとして、オプティカルボンディングに用いることで、当該表示装置の表示性能及び耐久性を改善し、高信頼性の表示装置を提供できる。
回転粘度計(トキメック株式会社製のE型粘度計VISCONIC EMD)を使用して、25℃における粘度(mPa・s)を測定した。
厚みが10mm以上の硬化性シリコーン組成物をシャーレ中、25℃で48時間放置して硬化させ、針入度測定装置(離合社製のRPM-201)を使用して、25℃における針入度を測定した。
硬化性シリコーン組成物の25℃での粘弾性測定、損失正接が1に到達した時間をゲル化時間とした。
2枚のガラス板(縦75mm×横25mm×厚さ2mm)の間に、硬化後のシリコーン硬化物の寸法が縦25mm×横25mm×厚さ200μmとなるように硬化性シリコーン組成物を充填し、室温で48時間加熱することにより、前記組成物を硬化させ、2枚のガラス板に挟まれた硬化物からなる試験体を作製した。この試験体を、JIS K6850に規定される方法に準じてせん断接着試験を行ない、接着強度を測定した。
2枚のガラス板(縦75mm×横25mm×厚さ2mm)の間に、硬化後のシリコーン硬化物の寸法が縦25mm×横25mm×厚さ200μmとなるように硬化性シリコーン組成物を充填した試験体を、25℃で48時間放置した。試験体の黄色度b*を測定した。
下記の成分を用いて、表1に示す組成(質量部)の硬化性シリコーン組成物を調製した。各構造式において、Meはメチル基であり、Viはビニル基であり、Phはフェニル基であり、Epはエポキシ基である。
a1-1:ViMe2SiO(SiMe2O)232OSiMe2Vi
a1-2:ViMe2SiO(SiMe2O)372OSiMe2Vi
a1-3:ViMe2SiO(SiMe2O)233(SiMePhO)24OSiMe2Vi
a1-4:ViMe2SiO(SiMePhO)31OSiMe2Vi
a2-1:(ViMe2SiO1/2)0.046(Me3SiO1/2)0.394(SiO4/2)0.56
a2-2:Si(OSiMe2Vi)4
b1-1:HMe2SiO(SiMe2O)24OSiMe2H
b2-1:(HMe2SiO1/2)0.63(SiO4/2)0.37
b2-2:(HMe2SiO1/2)0.75(PhSiO3/2)0.25
c1-1:白金 1,3―ジビニル-1,1,3,3-テトラメチルジシロキサン錯体
c2-1:(メチルシクロペンタジエニル)トリメチル白金(IV)
d1-1:1,6-ビス(トリメトキシシリル)ヘキサン
d1-2:1,3-ビス(トリメトキシシリルエチル)テトラメチルジシロキサン
任意成分-1:Me3SiO(SiMe2O)450(SiMePhO)40OSiMe3
15 接着層
20 第1の光学部材
20a 接着面
20b 面
21 第2の光学部材
21a 面
21b 面
100、100A LED
101、101B、101G、101R LED素子(光学素子)
102 リードフレーム(基材)
104 ボンディングワイヤ
105 枠材
106 本硬化物
110 表示パネル
111 表示面
120 ベゼル
121 枠部
122 開口端
130 前面パネル
140 樹脂部材(ダム)
150 OCR
170、170A 表示モジュール
171 バックライトユニット
172 間隙
173 空間
200 光学ディスプレイ
201 画像表示パネル
300A 光学ディスプレイ
300B 光学ディスプレイ
301 画像表示パネル
301a 面
302 タッチパネル
400 表示装置(光学ディスプレイ)
Claims (22)
- (A)以下の(a1)成分及び(a2)成分:
(a1)一分子中に少なくとも2個の炭素原子数2~12のアルケニル基を有する直鎖状又は部分分岐状オルガノポリシロキサン
(a2)平均単位式:(R1 3SiO1/2)a(R1 2SiO2/2)b(R1SiO3/2)c(SiO4/2)d(式中、R1はそれぞれ独立に炭素原子数1~12の一価炭化水素基であり、R1の少なくとも1モル%は炭素原子数2~12のアルケニル基であり、a、b、c及びdは次の条件を全て満たす:a+b+c+d=1、a+b+c+d=1、0≦a≦0.8、0≦b≦0.4、0≦c≦0.8、0≦d≦0.6、0.2≦c+d≦0.8)で表される、アルケニル基を有するオルガノポリシロキサン
を含む、アルケニル基を有するオルガノポリシロキサン、
(B)以下の(b1)成分及び(b2)成分:
(b1)分子鎖末端にケイ素結合水素原子を有する直鎖状又は部分分岐状オルガノハイドロジェンポリシロキサン
(b2)平均単位式:(R2 3SiO1/2)e(R2 2SiO2/2)f(R2SiO3/2)g(SiO4/2)h(式中、R2はそれぞれ独立にアルケニル基を除く炭素原子数1~12の一価炭化水素基又は水素原子であり、R2の少なくとも1モル%は水素原子であり、e、f、g及びhは次の条件を全て満たす:e+f+g+h=1、0≦e≦0.8、0≦f≦0.4、0≦g≦0.7、0≦h≦0.5、0.2≦g+h≦0.7)で表される、オルガノハイドロジェンポリシロキサン
を含む、オルガノハイドロジェンポリシロキサン、並びに
(C)ヒドロシリル化反応用触媒
を含む、硬化性シリコーン組成物であって、
(B)成分の含有量は、(A)成分中の脂肪族不飽和炭素-炭素結合1モルに対して、(B)成分中のケイ素結合水素原子が0.5~2モルとなる量である、硬化性シリコーン組成物。 - (a2)成分の含有量が、硬化性シリコーン組成物の硬化反応により不揮発性の固形分を形成する成分の和に対して0.5~10.0質量%の範囲であり、かつ、
(b2)成分の含有量が、硬化性シリコーン組成物の硬化反応により不揮発性の固形分を形成する成分の和に対して0.001~2.0質量%の範囲である、請求項1に記載の硬化性シリコーン組成物。 - (D)一分子中に2個以上のアルコキシシリル基を有する有機化合物
をさらに含む、請求項1又は2に記載の硬化性シリコーン組成物。 - i)ポリエーテル化合物の含有量が、硬化性シリコーン組成物の合計量に対して0.1質量%以下であり、かつ、
ii)エポキシ基及びアルコキシシリル基を有する化合物の含有量が、硬化性シリコーン組成物の合計量に対して0.1質量%以下である、請求項3に記載の硬化性シリコーン組成物。 - (D)成分の含有量が、硬化性シリコーン組成物の合計量に対して0.01~5質量%の範囲である、請求項3又は4に記載の硬化性シリコーン組成物。
- (C)成分が、
(c1)高エネルギー線の照射なしで活性を示すヒドロシリル化反応用触媒、
(c2)高エネルギー線の照射により活性を示すヒドロシリル化反応用触媒、及び
(c3)(c1)成分と(c2)成分の組み合わせであるヒドロシリル化反応用触媒
からなる群から選択される、請求項1から5のいずれか一項に記載の硬化性シリコーン組成物。 - 前記高エネルギー線が、紫外線、ガンマ線、X線、α線、又は電子線から選択される、請求項6に記載の硬化性シリコーン組成物。
- (D)成分が、
(d1)分子鎖末端に2個のアルコキシシリル基を有する有機化合物を含む、請求項3から10のいずれか一項に記載の硬化性シリコーン組成物。 - (A)成分の25℃における粘度が100,000mPa以下である、請求項1から8のいずれか一項に記載の硬化性シリコーン組成物。
- 光学用接着剤又は光学用粘着剤である、請求項1から9のいずれか一項に記載の硬化性シリコーン組成物。
- 請求項1から10のいずれか一項に記載の硬化性シリコーン組成物の硬化物。
- 25℃における針入度が5~70の範囲である、請求項14に記載の硬化物。
- 第1の透明又は不透明な光学部材と第2の透明又は不透明な光学部材との間に配置された請求項11又は12に記載の硬化物からなる接着層と、を備える積層体。
- 基材と、
前記基材に配置された光学素子と、
前記光学素子の少なくとも一部を封止する請求項11又は12に記載の硬化物と、を備える光学装置。 - 請求項13に記載の積層体を備える光学ディスプレイ。
- 前記(c1)高エネルギー線の照射なしで活性を示すヒドロシリル化触媒を少なくとも含有する請求項6又は7に記載の硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置し、前記二つの光学部材を前記硬化性シリコーン組成物を介して貼り合わせる配置工程、及び放置若しくは加熱して前記組成物のヒドロシリル化反応を進行させて前記組成物を硬化させる硬化工程を含む、積層体の製造方法。
- 前記(c2)高エネルギー線の照射により活性を示すヒドロシリル化触媒を少なくとも含有する請求項6又は7に記載の硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置し、前記二つの光学部材を前記硬化性シリコーン組成物を介して貼り合わせる配置工程、及び高エネルギー線照射後、放置若しくは加熱して前記組成物のヒドロシリル化反応を進行させて前記組成物を硬化させる硬化工程を含む、積層体の製造方法。
- 以下の工程を有する積層体の製造方法:
工程i):前記(c2)高エネルギー線の照射により活性を示すヒドロシリル化触媒を少なくとも含有する請求項6又は7に記載の硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置する工程
工程ii):工程i)で配置された前記組成物に高エネルギー線照射を行い、当該組成物を非流動性の半硬化状態にする工程
工程iii):工程ii)の後、前記二つの光学部材を半硬化状態の前記硬化性シリコーン組成物を介して貼り合わせる工程
工程iv):工程iii)で貼り合わせた前記二つの光学部材を、15~80℃の温度範囲で半硬化状態の前記組成物のヒドロシリル化反応を進行させ、前記組成物を本硬化させる工程。 - 以下の工程を有する積層体の製造方法:
工程i):前記(c1)高エネルギー線の照射なしで活性を示すヒドロシリル化触媒と、前記(c2)高エネルギー線の照射により活性を示すヒドロシリル化触媒との両方を含有する請求項6又は7に記載の硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置する工程であって、少なくとも一方の部材として透明な光学部材を用いる工程
工程ii):工程i)で配置された前記組成物を15~80℃の温度範囲で前記組成物のヒドロシリル化反応を進行させ、当該組成物を非流動性の半硬化状態にする工程
工程iii):工程ii)の後、前記二つの光学部材を半硬化状態の前記硬化性シリコーン組成物を介して貼り合わせる工程
工程iv):工程iii)で貼り合わせた前記二つの光学部材について、前記透明な光学部材を通して、前記硬化性シリコーン組成物に高エネルギー線照射を行った後、15~80℃の温度範囲で半硬化状態の前記組成物のヒドロシリル化反応を進行させ、前記組成物を本硬化させる工程。 - 以下の工程を有する積層体の製造方法:
工程i):(c1)高エネルギー線の照射なしで活性を示すヒドロシリル化触媒を少なくとも含有する請求項6又は7に記載の硬化性シリコーン組成物を二つの光学部材のうち少なくとも一方の部材の一面又は両面に配置する工程
工程ii):工程i)で配置された前記組成物に15~80℃の温度範囲で前記組成物のヒドロシリル化反応を進行させ、当該組成物を非流動性の半硬化状態にする工程
工程iii):工程ii)の後、前記二つの光学部材を半硬化状態の前記硬化性シリコーン組成物を介して貼り合わせる工程
工程iv):工程iii)で貼り合わせた前記二つの光学部材を、さらに、15~80℃の温度範囲で半硬化状態の前記組成物のヒドロシリル化反応を進行させ、前記組成物を本硬化させる工程。 - 積層体が光学装置である、請求項17から20いずれか一項に記載の積層体の製造方法。
- 積層体が光学ディスプレイである、請求項17から20いずれか一項に記載の積層体の製造方法。
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