WO2018061754A1 - 架橋性オルガノポリシロキサン組成物、その硬化物及びled装置 - Google Patents
架橋性オルガノポリシロキサン組成物、その硬化物及びled装置 Download PDFInfo
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- WO2018061754A1 WO2018061754A1 PCT/JP2017/032915 JP2017032915W WO2018061754A1 WO 2018061754 A1 WO2018061754 A1 WO 2018061754A1 JP 2017032915 W JP2017032915 W JP 2017032915W WO 2018061754 A1 WO2018061754 A1 WO 2018061754A1
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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
- C08G77/80—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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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/852—Encapsulations
- H10H20/854—Encapsulations characterised by their material, e.g. epoxy or silicone resins
Definitions
- the present invention relates to a crosslinkable organopolysiloxane composition, a cured product obtained by curing the composition, and an LED device having the cured product.
- the silicone composition forms a cured product having excellent rubber properties such as weather resistance, heat resistance, hardness, and elongation, it is used for the purpose of protecting LED elements, electrodes, substrates and the like in LED devices.
- a high refractive index type addition silicone composition having a small shrinkage at the time of curing and good light extraction efficiency is preferably used.
- the LED device may use silver or a silver-containing alloy having good conductivity as an electrode, and the substrate may be silver-plated in order to improve luminance.
- the silicone composition is a general name for a composition containing a compound having a chemical structure of organopolysiloxane, and is synonymous in this technical field.
- a cured product made of a silicone composition has high gas permeability, and when used for a high-brightness LED with high light intensity and large heat generation, a sealing material due to the invasion of corrosive gas or water vapor in the environment. There is a problem that the brightness is lowered due to the discoloration of silver, the corrosion of silver plated on the electrodes and the substrate, and the adhesive strength.
- Patent Document 1 (A) a diorganopolysiloxane containing at least two alkenyl groups bonded to a silicon atom, (B) SiO 4/2 unit, Vi (R 2 ) 2 SiO 1/2 unit and R 2 3 Organopolysiloxane having a resin structure composed of SiO 1/2 units, (C) an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to silicon atoms in one molecule, and (D) a platinum group metal catalyst
- A a diorganopolysiloxane containing at least two alkenyl groups bonded to a silicon atom
- B SiO 4/2 unit, Vi (R 2 ) 2 SiO 1/2 unit and R 2 3
- Organopolysiloxane having a resin structure composed of SiO 1/2 units
- C an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to silicon atoms in one molecule
- D platinum group metal catalyst
- Patent Document 2 (A) an organopolysiloxane represented by an average unit formula, any (B) a straight chain having at least two alkenyl groups in one molecule and having no silicon-bonded hydrogen atom
- a curable silicone composition comprising at least an organopolysiloxane, (C) an organopolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule, and (D) a catalyst for hydrosilylation reaction.
- the curable silicone composition described in Patent Document 2 is an organopolysiloxane that has a high hydrosilylation reactivity and forms a cured product having a low gas permeability, a high reactivity, and a low gas permeability. It is said that a curable silicone composition that forms a cured product and a cured product with low gas permeability are provided.
- the present invention has been made in view of the above circumstances, and the object of the present invention is to maintain heat-resistant transparency and adhesion to an LED substrate, and in a harsh environment of 80 ° C. atmosphere where sulfur exists.
- Another object of the present invention is to provide a crosslinkable organopolysiloxane composition in which silver plating is not corroded, a cured product obtained by curing the composition, and an LED device having the cured product.
- the cured product of the present invention is obtained by curing the crosslinkable organopolysiloxane composition.
- the cured product preferably has a refractive index of 1.58 or more at 25 ° C., more preferably 1.59 or more, and particularly preferably 1.60 or more.
- the LED device of the present invention is characterized in that the LED element is sealed with a cured product of the crosslinkable organopolysiloxane composition.
- the crosslinkable organopolysiloxane composition of the present invention should be stored separately from the component (D) and the component (C) in order to prevent the curing reaction from proceeding during storage.
- the crosslinkable organopolysiloxane composition of the present invention is prepared by, for example, mixing a solution containing the component (A) and the component (C) with a solution containing the component (B) and the component (D). Can be prepared.
- the crosslinkable organopolysiloxane composition of the present invention forms a cured product excellent in high refractive index and corrosive gas shielding property (sulfuration resistance) while maintaining the heat-resistant transparency and excellent adhesion of the organopolysiloxane. Therefore, it is useful as a sealing material for LED.
- the LED device in which the LED element is sealed with a cured product of the crosslinkable organopolysiloxane composition according to the present invention is characterized by excellent reliability in an atmosphere containing sulfur. Such an LED device can be expected to have a high light extraction effect.
- Siloxane A compound having a Si—O—Si bond.
- Polysiloxane A compound having a plurality of Si—O—Si bonds.
- Organopolysiloxane A polysiloxane having a structure in which organic groups are bonded to Si atoms constituting Si—O—Si bonds.
- Organopolysiloxane composition A composition containing at least an organopolysiloxane and formulated for specific performance.
- the linear organopolysiloxane is an organo having no structure in which the siloxane chain is connected to the main chain of the polysiloxane (—Si—O—Si—O—chain) via an atom linking group on the Si atom. It refers to polysiloxane. Also called linear component.
- the branched organopolysiloxane refers to an organopolysiloxane containing at least one T-type or cross-shaped branch point.
- the component (A) is an important component that is combined with the component (B) and affects the physical properties of the crosslinked organopolysiloxane composition.
- This component (A) contains an aryl group containing at least one biphenylyl group, corrosion gas resistance, refractive index, and dicing properties can be improved.
- R 1 is a monovalent hydrocarbon group having 1 to 14 carbon atoms, and among the monovalent hydrocarbon groups, at least one is an alkenyl group having 2 to 6 carbon atoms and at least one is An aryl group, and at least one of the aryl groups is a biphenylyl group.
- the plurality of R 1 may be the same as or different from each other.
- monovalent hydrocarbon groups include alkyl groups having 1 to 6 carbon atoms, alkenyl groups having 2 to 6 carbon atoms, aryl groups having 6 to 14 carbon atoms, and the like.
- Examples of the group include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, and a methyl group and an ethyl group are preferable.
- Examples of the aryl group having 6 to 14 carbon atoms include a biphenylyl group as an essential component, and a substituted or unsubstituted phenyl group, naphthyl group, and anthracenyl group.
- Examples of the alkenyl group having 2 to 6 carbon atoms include vinyl group, allyl group, butenyl group, pentenyl group and hexenyl group.
- R 2 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and examples thereof include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, preferably a methyl group, an ethyl group It is.
- the plurality of R 2 may be the same as or different from each other.
- a represents a number indicating the ratio of siloxane units represented by the general formula: R 1 3 SiO 1/2 and satisfies 0 ⁇ a ⁇ 0.1, preferably 0 ⁇ a ⁇ 0.08. Is a number. This is because sufficient strength and hardness at room temperature of a cured product obtained by excessively high fluidity when a exceeds the upper limit of the above range (in this specification, cured product is synonymous with crosslinked product) can be obtained. Because it disappears.
- b represents a number indicating the ratio of the siloxane unit represented by the general formula: R 1 2 SiO 2/2 , and a number satisfying 0.2 ⁇ b ⁇ 0.9, preferably 0.3 ⁇ b ⁇ 0.7. It is.
- c represents a number indicating the ratio of siloxane units represented by the general formula: R 1 SiO 3/2 , and 0.1 ⁇ c ⁇ 0.6, preferably 0.2 ⁇ c ⁇ 0. It is a number satisfying 6. This is because when c is less than the lower limit of the above range, sufficient hardness at room temperature of the obtained cured product cannot be obtained, whereas when the upper limit of the above range is exceeded, the obtained cured product is acceptable.
- D represents a number indicating the ratio of the siloxane unit represented by the general formula: SiO 4/2 , and is a number satisfying 0 ⁇ d ⁇ 0.2, preferably 0 ⁇ d ⁇ 0.1. This is because when d exceeds the upper limit of the above range, the flexibility of the obtained cured product becomes insufficient.
- E represents a number indicating the proportion of the end of the branched organosiloxane represented by the general formula: R 2 O 1/2 and is a number satisfying 0 ⁇ e ⁇ 0.1. This is because sufficient hardness at room temperature of the cured product obtained when e exceeds the upper limit of the above range cannot be obtained.
- the sum of a, b, c, d and e is 1.
- the component (A) is represented by an average unit formula: (R 1 2 SiO 2/2 ) b (R 1 SiO 3/2 ) c .
- the component (B) is an important second component that is combined with the component (A) and determines the physical properties of the crosslinked organopolysiloxane composition, and includes at least two alkenyl groups and at least one aryl group in one molecule. And having at least three terminal siloxane units of polysiloxane represented by the general formula (1): R 3 3 SiO 1/2 in one molecule, and having a viscosity of 20 Pa ⁇ s or less at 25 ° C. An alkenyl-functional branched organopolysiloxane containing an aryl group.
- the component (B) preferably has fluidity with a viscosity of 20 Pa ⁇ s or less at 25 ° C.
- R 3 represents a substituted or unsubstituted monovalent hydrocarbon group.
- monovalent hydrocarbon groups include alkyl groups having 1 to 6 carbon atoms, alkenyl groups having 2 to 6 carbon atoms, aryl groups having 6 to 14 carbon atoms, and the like.
- the group include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, and a methyl group and an ethyl group are preferable.
- Examples of the aryl group having 6 to 14 carbon atoms include a substituted or unsubstituted biphenylyl group, a phenyl group, a naphthyl group, and an anthracenyl group.
- Examples of the alkenyl group having 2 to 6 carbon atoms include vinyl group, allyl group, butenyl group, pentenyl group and hexenyl group.
- a plurality of R 3 may be the same as or different from each other. Even in the branched organopolysiloxane, by having at least three terminal siloxane units of polysiloxane represented by the general formula: R 3 3 SiO 1/2 in one molecule, the viscosity is 100 Pa ⁇ s at 25 ° C.
- a polysiloxane having the following fluidity can be obtained. Further, by controlling the production method of the component (B), the molecular weight of the alkenyl functional branched organopolysiloxane having a three-dimensional structure can be controlled within a preferable range, and the fluidity at a viscosity of 25 ° C. or less is preferable. A polysiloxane having While having this branched structure and having fluidity at 25 ° C., a composition having a high curing speed and no surface tack of the cured product can be obtained.
- the component (B) has a viscosity of preferably 50000 mPa ⁇ s or less at 25 ° C., more preferably 30000 mPa ⁇ s or less, and particularly preferably 20000 mPa ⁇ s or less.
- R 4 is a monovalent hydrocarbon group having 1 to 14 carbon atoms, and at least two of the monovalent hydrocarbon groups are alkenyl groups having 2 to 6 carbon atoms and at least one is aryl. It is a group.
- Examples of monovalent hydrocarbon groups include alkyl groups having 1 to 6 carbon atoms, alkenyl groups having 2 to 6 carbon atoms, aryl groups having 6 to 14 carbon atoms, and the like.
- Examples of the group include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, and a methyl group and an ethyl group are preferable.
- Examples of the aryl group having 6 to 14 carbon atoms include a substituted or unsubstituted biphenylyl group, a phenyl group, a naphthyl group, and an anthracenyl group.
- alkenyl group having 2 to 6 carbon atoms examples include vinyl group, allyl group, butenyl group, pentenyl group and hexenyl group.
- the plurality of R 4 may be the same as or different from each other.
- f is a number that defines the amount of terminal siloxane units of the polysiloxane represented by the general formula: R 4 3 SiO 1/2 for obtaining fluidity of 20 Pa ⁇ s or less at 25 ° C.
- h and i Is a number that defines the component for the organopolysiloxane to take a branched structure, and both f and h + i must be greater than zero.
- the ratio of the amount of terminal siloxane units of the polysiloxane represented by the general formula: R 3 3 SiO 1/2 with respect to the branch point f / (h + i) Must be greater than or equal to 0.5, with a maximum of 4.
- the linear component represented by the general formula: R 4 2 SiO 2/2 is not necessarily an essential component, but may be introduced as a component in the polymer in order to obtain a necessary viscosity, and 0 ⁇ g ⁇ 0. Although it may be in the range of 96, it is preferable that 0 ⁇ g ⁇ 0.90.
- (B) component is an average composition formula (R 4 3 SiO (R 4 2 SiO) m ) e SiR 4 (4-e) (wherein R 4 is a monovalent hydrocarbon group having 1 to 14 carbon atoms ) Among the monovalent hydrocarbon groups, at least two are alkenyl groups having 2 to 6 carbon atoms and at least one is an aryl group, m represents an integer of 0 to 200, and e is 3 Or an alkenyl-functional branched organopolysiloxane containing an aryl group represented by (4).
- m represents the number of linear siloxane units, and is an integer satisfying 0 ⁇ m ⁇ 200, preferably 0 ⁇ m ⁇ 100.
- e represents 3 or 4, and is a number that defines the structure for forming the branch point of the branched organopolysiloxane.
- e When e is 3, it becomes a T-type branch point, and when e is 4. It becomes a cross-shaped branch point.
- R 5 represents an alkenyl group having 2 to 6 carbon atoms, and examples thereof include a vinyl group, an allyl group, a butenyl group, a pentenyl group, and a hexenyl group
- R 6 represents the number of carbon atoms in which at least one is an aryl group.
- alkyl group 6 examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, and a hexyl group, and a methyl group and an ethyl group are preferable.
- aryl group having 6 to 14 carbon atoms include a substituted or unsubstituted phenyl group, biphenylyl group, naphthyl group, and anthracenyl group.
- the plurality of R 5 , R 6 and R 7 may be the same as or different from each other.
- n represents the number of linear siloxane units, and is an integer satisfying 0 ⁇ n ⁇ 200, preferably 0 ⁇ n ⁇ 100. This is because when n exceeds the upper limit of the above range, the viscosity of the obtained branched organopolysiloxane exceeds 20 Pa ⁇ s at 25 ° C.
- R 7 represents a monovalent hydrocarbon group having 1 to 14 carbon atoms which does not contain an alkenyl group, and is a methyl group, ethyl group, propyl group, butyl group, pentyl group, hexyl group, substituted or unsubstituted
- aryl groups such as biphenylyl, phenyl, naphthyl, and anthracenyl groups.
- j represents 3 or 4, and is a number defining a structure for forming a branch point of the branched organopolysiloxane. When j is 3, a T-type branch point is obtained, and j is 4 In this case, it becomes a cross-shaped branch point.
- the mixing ratio of the component (A) and the component (B) is such that the weight ratio of A / B is 1/100 to 100/1, and 1/50 to 50/1. It is preferable that the ratio is 1/20 to 20/1.
- the amounts of the component (A) and the component (B) are described in parts by weight, and those skilled in the art will show the mixing ratio of the component (A) and the component (B) in the present specification in a weight ratio. It is self-evident.
- Component (C) is a crosslinking agent of the crosslinkable organopolysiloxane composition of the present invention (hereinafter also referred to as the present composition), and has at least two silicon atom-bonded hydrogen atoms in one molecule.
- Organopolysiloxane in which 12 to 70 mol% of the combined organic groups are aryl groups.
- an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group or a hexyl group, a cycloalkyl group such as a cyclopentyl group or a cyclohexyl group, a phenyl group
- Examples include aryl groups such as a tolyl group, a naphthyl group, an anthracenyl group, and a biphenylyl group.
- 12 to 70 mol% of the silicon-bonded organic group is an aryl group.
- a silicon atom-bonded hydrogen atom is synonymous with Si—H.
- R 8 is a monovalent hydrocarbon group having 1 to 14 carbon atoms, and at least one of the monovalent hydrocarbon groups is an aryl group, and the monovalent hydrocarbon group includes a carbon atom. Examples thereof include alkyl groups having 1 to 6 carbon atoms and aryl groups having 6 to 14 carbon atoms.
- alkyl groups having 1 to 6 carbon atoms include methyl, ethyl, propyl, butyl, pentyl, and hexyl. Examples thereof include a methyl group and an ethyl group.
- Examples of the aryl group having 6 to 14 carbon atoms include substituted or unsubstituted biphenylyl group, phenyl group, naphthyl group, and anthracenyl group.
- a plurality of R 8 may be the same as or different from each other. Of R 8 , the aryl group content is in the range of 12 to 70 mol%.
- the content of component (C) is such that the molar ratio of silicon-bonded hydrogen atoms in this component to the total of alkenyl groups in component (A) and component (B) is 0.5-2.
- the component (D) is a hydrosilylation reaction catalyst for accelerating the hydrosilylation reaction between the alkenyl groups of the components (A) and (B) and the silicon atom-bonded hydrogen atom in the component (C).
- the component (D) include platinum-based catalysts, rhodium-based catalysts, and palladium-based catalysts, and platinum-based catalysts are preferred because they can significantly accelerate the crosslinking of the composition.
- a platinum-alkenylsiloxane complex is preferable because of its high catalytic activity, and since the stability of the complex is good, it has 1,3-divinyl-1,1,3,3-tetramethyldisiloxane as a ligand. Platinum complexes are preferred.
- the content of the component (D) is an amount sufficient to promote the hydrosilylation reaction between the alkenyl group of the component (A), the component (B), and the silicon atom-bonded hydrogen atom of the component (C).
- the amount of the metal atom in component (D) in the composition (D) is in the range of 0.1 ppm to 100 ppm in terms of weight (usually synonymous with mass). This is because if the content of component (D) is less than the lower limit of the above range, the resulting composition will not be sufficiently crosslinked, or will not be crosslinked at a sufficient rate, while exceeding the upper limit of the above range. This is because problems such as coloring may occur in the obtained cured product.
- the present composition contains the above components (A) to (D), but a reaction inhibitor may be added as an optional component for the purpose of arbitrarily changing the curing rate.
- Reaction inhibitors include 2-methyl-3-butyn-2-ol, 2-phenyl-3-butyn-2-ol, alkyne alcohols such as ethynylcyclohexanol, 1,3,5,7-tetramethyl-1 , 3,5,7-tetravinylcyclotetrasiloxane, benzotriazole and the like.
- the content of these reaction inhibitors is not particularly limited, but is preferably in the range of 1 ppm to 1000 ppm with respect to the weight of the present composition.
- an adhesion promoter may be contained in the present composition when adhesion to a substrate is required depending on the use.
- the adhesion promoter include trialkoxysilyl groups (for example, trimethoxysilyl group and triethoxysilyl group), hydrosilyl groups, epoxy groups (for example, 3-glycidoxypropyl group), alkenyl groups (for example, vinyl group and allyl group). Group) in one molecule, and the like.
- the present composition includes, as the other optional components, organopolysiloxanes other than the components (A) to (C), inorganic fillers (for example, silica, glass, alumina), as long as the object of the present invention is not impaired. , Zinc oxide, etc.), organic resin fine powder such as polymethacrylate resin, heat-resistant agent, dye, pigment, phosphor, flame retardant, solvent and the like.
- organopolysiloxane other than the component (A) to the component (C) include linear alkenyl functional organopolysiloxanes.
- the crosslinkable organopolysiloxane composition of the present invention has a straight chain of alkenyl functional groups.
- a crosslinkable organopolysiloxane composition having good characteristics can be obtained by using the component (B) without using a linear alkenyl functional organopolysiloxane which has been conventionally considered an essential component. can get.
- the preferable range of the viscosity of the present composition is the same as the preferable range of the viscosity of the component (B).
- the composition is rapidly cross-linked by heating, has no surface tack, forms a cured product having sufficient flexibility, and preferably can form a hard cured product. When the composition is completely cured by heating, the composition can be made to have a more preferable hardness depending on the application, and particularly high hardness can be obtained.
- the crosslinkable organopolysiloxane composition of the present invention preferably has a type D durometer hardness of 45 or more as defined in JIS K 6253 when heated at 150 ° C. for 3 hours, depending on the desired application.
- the Type D durometer hardness can be 45-60, and the Type D durometer hardness can be 60-80 depending on other desired applications.
- this composition can have a type A durometer hardness of 30 to 60 as defined in JIS K 6253 when completely cured by heating.
- the type A durometer hardness can be 60-90 depending on the desired application.
- the composition can form a stable cured product in which mechanical properties, hardness and the like are not changed by heating.
- the heating temperature is preferably within the range of 80 ° C to 200 ° C.
- the present composition is not limited to a molding method, and can be used as an adhesive application, film formation, potting agent, coating agent, and underfill agent by ordinary mixing and oven heating. In particular, since it has a high refractive index and a high light transmittance, it is suitable for use in lens materials for optical applications, potting agents, coating agents, protective materials for semiconductor elements such as LEDs.
- the cured product of the present invention is obtained by curing the crosslinkable organopolysiloxane composition.
- the shape of the cured product is not particularly limited, and may be various, such as a lump shape, a sheet shape, and a film shape.
- the cured product can be handled alone, but can also be handled in a state where the optical semiconductor element or the like is covered or sealed.
- the crosslinkable organopolysiloxane composition of the present invention will be described in detail with reference to examples.
- the viscosity is a value at 25 ° C.
- Me, Ph, Vi, and BPP represent a methyl group, a phenyl group, a vinyl group, and a biphenylyl group, respectively.
- the hardness of the cured product was measured with JIS K 6253 “Method for testing hardness of vulcanized rubber and thermoplastic rubber” using a type A and type D durometer. JIS is an abbreviation for Japan Industrial Standards.
- the refractive index of the cured product was measured with a laser having a wavelength of 550 nm using a prism coupler model 2010 manufactured by Metricon.
- Example 1 Average unit formula: (MeViSiO 2/2 ) 0.3 (Ph 2 SiO 2/2 ) 0.25 (BPPSiO 3/2 ) 0.25 (PhSiO 3/2 ) Branched methyl vinyl represented by 0.2 62 parts by weight of biphenylylphenylpolysiloxane, 17 parts by weight of branched methylvinylphenylpolysiloxane having a viscosity of 1200 mPa ⁇ s at 25 ° C.
- Example 1 When the composition obtained in Example 1 was heated to 150 ° C., curing was completed in 3 hours, and a cured product having a Type D durometer hardness of 80 was obtained at 25 ° C. There was no surface tack, and hardness did not change even after heating.
- the obtained cured product had a refractive index of 1.6024, and a high refractive index was obtained.
- Example 2 Average unit formula: (MeViSiO 2/2 ) 0.3 (PhBPPSiO 2/2 ) 0.25 (PhSiO 3/2 ) 62 parts by weight of branched methylvinylbiphenylylphenylpolysiloxane represented by 0.45 , formula: (ViMe 2 SiO (SiPhMeO) 15 ) 3 SiPh, a viscosity of 6000 mPa ⁇ s at 25 ° C.
- Example 2 When the composition obtained in Example 2 was heated to 150 ° C., curing was completed in 3 hours, and a cured product having a Type D durometer hardness of 80 was obtained at 25 ° C. There was no surface tack, and hardness did not change even after heating.
- the obtained cured product had a refractive index of 1.5901, and a high refractive index was obtained.
- Example 1 and Example 2 and Comparative Example 1 and Comparative Example 2 The composition obtained in Example 1 and Example 2 and Comparative Example 1 and Comparative Example 2 was applied to an LED substrate equipped with a silver-plated electrode and an LED element, and the composition was heated in an oven at 150 ° C. for 3 hours. An LED device in which the LED element was sealed with a cured product was produced. The produced LED device was put in an oven at 80 ° C. under a sulfur atmosphere, and after 24 hours, the silver-plated electrode was observed with a microscope. A case where no discoloration is observed in the silver plating electrode is determined as “ ⁇ ”, and a case where the silver plating electrode is changed into black is determined as “x”.
- Example 1 and Example 2 and Comparative Example 1 and Comparative Example 2 were applied to a thickness of 0.5 mm, 1.0 mm, 2.0 mm and 3.0 mm, The composition was cured by heating at 150 ° C. for 3 hours in an oven, and then the whole glass substrate was cut using a dicing saw. The case where the glass substrate could be cut without causing cracks or the like in the cured product was determined as “ ⁇ ”, and the case where the cured material was cracked and the glass substrate could not be cut was determined as “ ⁇ ”. The results are shown in Table 1.
- the crosslinkable organopolysiloxane composition of the present invention can be used as a material that can be stress-reduced because it has a fast cross-linking, does not have a surface tack of a cured product, and has sufficient flexibility. It can be used as an adhesive, potting agent, protective coating agent, and underfill agent.
- the cured product of the composition is a material having a high refractive index and a high light transmittance, it is suitable for uses such as lens materials for optical applications, potting agents, coating agents, and protective materials for semiconductor elements.
- the cured product of the composition is excellent in corrosion resistance, it is particularly suitable for an LED device used outdoors or in an environment that is easily affected by exhaust gas.
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Abstract
Description
(A)平均単位式:
(R1 3SiO1/2)a(R1 2SiO2/2)b(R1SiO3/2)c(SiO4/2)d (R2O1/2)e(式中、R1は炭素原子数1~14の一価炭化水素基であり、該一価炭化水素基のうち、少なくとも1個は炭素原子数2~6のアルケニル基であり且つ少なくとも1個はアリール基であり、該アリール基のうち、少なくとも1個はビフェニリル基であり、R2は水素原子または炭素原子数1~6のアルキル基を表し、a、b、c、d、およびeは、0≦a≦0.1、0.2≦b≦0.9、0.1≦c≦0.6、0≦d≦0.2、0≦e≦0.1、かつa+b+c+d+e=1を満たす数を表す。)で示される、ビフェニリル基を含有するアルケニル官能性分岐状オルガノポリシロキサン、
(B)一分子中に少なくとも2個のアルケニル基と、少なくとも1個のアリール基を有し、下記一般式(1)で表されるシロキサン単位を一分子中に少なくとも3個有する、(好ましくは25℃において粘度が20Pa・s以下の流動性を有する)アリール基を含有するアルケニル官能性分岐状オルガノポリシロキサン{(A)成分と(B)成分の比が1/100~100/1}、
R3 3SiO1/2 一般式(1)
(式中、R3は置換又は非置換の一価炭化水素基を表す。)
(C)一分子中に少なくとも2個のケイ素原子結合水素原子を有し、ケイ素原子結合有機基の12~70モル%がアリール基であるオルガノポリシロキサン{(A)成分中と(B)成分中のアルケニル基の合計に対する本成分中のケイ素原子結合水素原子のモル比が0.5~2となる量}、および
(D)ヒドロシリル化反応用触媒{(A)成分と(B)成分のアルケニル基と(C)成分のケイ素原子結合水素原子とのヒドロシリル化反応を促進するに十分の量}を含み、アルケニル官能性直鎖状オルガノポリシロキサンを含まない架橋性オルガノポリシロキサン組成物である。
シロキサン:Si-O-Si結合を持つ化合物。
ポリシロキサン:Si-O-Si結合を複数個持つ化合物。
オルガノポリシロキサン:Si-O-Si結合を構成するSi原子に有機基が結合した構造を有するポリシロキサン。
オルガノポリシロキサン組成物:オルガノポリシロキサンを少なくとも含む、特定の性能を求めて配合された組成物。
直鎖状オルガノポリシロキサンとは、ポリシロキサンの主鎖(-Si-O-Si-O-鎖)に対し、Si原子上に原子連結基を介してシロキサン鎖が連結した構造を有さないオルガノポリシロキサンのことを言う。リニア成分とも言われる。
分岐状オルガノポリシロキサンとは、T型または十字型の分岐点を少なくとも1個含むオルガノポリシロキサンを言う。
(A)成分は、(B)成分と組み合わされて架橋オルガノポリシロキサン組成物の物性を左右する重要な成分であり、平均単位式:
(R1 3SiO1/2)a(R1 2SiO2/2)b(R1SiO3/2)c(SiO4/2)d (R2O1/2)eで示される、少なくとも1個のビフェニリル基を含むアリール基を含有するアルケニル官能性分岐状オルガノポリシロキサンである。この(A)成分が少なくとも1個のビフェニリル基を含むアリール基を含有することで、耐腐食ガス性、屈折率、及びダイシング性を高められることを本発明者らは見出した。
なお、25℃において粘度が100Pa・sであると、25℃で流動性を有することは当業者にとって自明である。
(B)成分は、25℃において粘度が50000mPa・s以下であることが好ましく、30000mPa・s以下であることがより好ましく、20000mPa・s以下であることが特に好ましい。
(R4 3SiO1/2)f(R4 2SiO2/2)g(R4SiO3/2)h(SiO4/2)iで示される、アリール基を含有するアルケニル官能性分岐状オルガノポリシロキサンが例示される。ここでR4は炭素原子数1~14の一価炭化水素基であり、該一価炭化水素基のうち、少なくとも2個は炭素原子数2~6のアルケニル基であり且つ少なくとも1個はアリール基である。一価炭化水素基としては、炭素原子数1~6のアルキル基、炭素原子数2~6のアルケニル基、炭素原子数6~14のアリール基等が例示され、炭素原子数1~6のアルキル基としてはメチル基、エチル基、プロピル基、ブチル基、ペンチル基、ヘキシル基などが例示され、好ましくはメチル基、エチル基である。また、炭素原子数6~14のアリール基としては置換または無置換のビフェニリル基、フェニル基、ナフチル基、アントラセニル基が例示される。炭素原子数2~6のアルケニル基としてはビニル基、アリル基、ブテニル基、ペンテニル基、ヘキセニル基が例示される。複数のR4は互いに同じであっても異なっていてもよい。式中、f、g、h、iは、0<f≦0.8、0≦g≦0.96、0<(h+i)、0.5≦f/(h+i)≦4、f+g+h+i=1を満たす数である。ここでfは25℃で20Pa・s以下の流動性を得るための一般式:R4 3SiO1/2で表されるポリシロキサンの末端シロキサン単位の量を規定する数であり、hとiはオルガノポリシロキサンが分岐状構造をとるための成分を規定する数であって、fとh+iのいずれも0よりも大きい数でなければならない。また、25℃で20Pa・s以下の流動性を得るためには、分岐点に対する一般式:R3 3SiO1/2で表されるポリシロキサンの末端シロキサン単位の量の比f/(h+i)は0.5以上でなければならず、最大は4である。一般式:R4 2SiO2/2で表される直鎖状成分は必ずしも必須成分ではないが、必要な粘度を得るためにポリマー内の成分として導入してもよく、0≦g≦0.96の範囲であればよいが、0≦g≦0.90であることが好ましい。
(B)成分が、平均組成式(R4 3SiO(R4 2SiO)m)eSiR4 (4-e)(式中、R4は炭素原子数1~14の一価炭化水素基であり、該一価炭化水素基のうち、少なくとも2個は炭素原子数2~6のアルケニル基であり且つ少なくとも1個はアリール基であり、mは0以上200以下の整数を表し、eは3または4を表す。)で示される、アリール基を含有するアルケニル官能性分岐状オルガノポリシロキサンである態様も好ましい。式中、mは直鎖状シロキサン単位の数を示し、0≦m≦200、好ましくは0≦m≦100を満たす整数である。式中、eは3または4を表し、分岐状オルガノポリシロキサンの分岐点を形成するための構造を規定する数字であり、eが3の時、T型の分岐点となり、eが4の時、十字型の分岐点となる。
実施例では(A)成分と(B)成分の量が重量部で記載されており、当業者であれば本明細書中の(A)成分と(B)成分の混合比率は重量比で示されていることは自明である。
前記(A)成分から(C)成分以外のオルガノポリシロキサンとして、直鎖状のアルケニル官能性オルガノポリシロキサンを挙げることができるが、本発明の架橋性オルガノポリシロキサン組成物は、アルケニル官能性直鎖状オルガノポリシロキサンを含まない。
本発明では、従来は必須性分と考えられていた直鎖状のアルケニル官能性オルガノポリシロキサンを用いなくても、(B)成分を用いることで良好な特性の架橋性オルガノポリシロキサン組成物を得られる。
本組成物は加熱により完全硬化した場合に用途に応じてより好ましい硬さにすることができ、特に高い硬さも得ることができる。本発明の架橋性オルガノポリシロキサン組成物は150℃で3時間の加熱をされた場合にJIS K 6253で規定されるタイプDデュロメータ硬さが45以上となることが好ましく、所望の用途に応じてタイプDデュロメータ硬さを45~60とすることができ、また別の所望の用途に応じてタイプDデュロメータ硬さを60~80とすることができる。逆に、ゴム状の硬化物を得たい場合は、本組成物は加熱により完全硬化した場合にJIS K 6253で規定されるタイプAデュロメータ硬さを30~60とすることができ、また別の所望の用途に応じてタイプAデュロメータ硬さを60~90とすることができる。
本組成物は、加熱により、機械的物性、硬度などが変化しない安定した硬化物を形成することができる。加熱温度としては80℃~200℃での範囲内で行うことが好ましい。また本組成物は、成型方法に制限はなく、通常の混合及びオーブン加熱等により、接着剤用途、フィルム形成、ポッティング剤、コーティング剤、及びアンダーフィル剤として使用することができる。特に、高屈折率で光透過率が高いので光学用途のレンズ材料や、LED等半導体素子のポッティング剤、コーティング剤、保護材などの用途に好適である。
本発明の硬化物は、上記の架橋性オルガノポリシロキサン組成物を硬化してなることを特徴とする。硬化物の形状は特に限定されず、例えば、塊状、シート状、フィルム状、など多岐にわたる。硬化物は、これを単体で取り扱うこともできるが、光半導体素子等を被覆もしくは封止した状態で取り扱うことも可能である。
平均単位式:(MeViSiO2/2)0.3(Ph2SiO2/2)0.25(BPPSiO3/2)0.25(PhSiO3/2)0.2で表される分岐状メチルビニルビフェニリルフェニルポリシロキサン62重量部、式:(ViMe2SiO(SiPhMeO)15)3SiPhで表される粘度が25℃で1200mPa・sの分岐状メチルビニルフェニルポリシロキサン17重量部、および式:(HMe2SiO)2SiPh2で表されるトリシロキサン21重量部を均一に混合した後、白金の1,3-ジビニル-1,1,3,3-テトラメチルジシロキサン錯体を本組成物に対して白金量が重量単位で5ppmとなる量を混合して25℃の粘度が6000mPa・sである架橋性オルガノポリシロキサン組成物を調製した。
平均単位式:(MeViSiO2/2)0.3(PhBPPSiO2/2)0.25(PhSiO3/2)0.45で表される分岐状メチルビニルビフェニリルフェニルポリシロキサン62重量部、式:(ViMe2SiO(SiPhMeO)15)3SiPhで表される粘度が25℃で6000mPa・sの分岐状メチルビニルフェニルポリシロキサン17重量部、および式:(HMe2SiO)2SiPh2で表されるトリシロキサン21重量部を均一に混合した後、白金の1,3-ジビニル-1,1,3,3-テトラメチルジシロキサン錯体を本組成物に対して白金量が重量単位で5ppmとなる量を混合して25℃の粘度が15000mPa・sである架橋性オルガノポリシロキサン組成物を調製した。
平均単位式:(MeViSiO2/2)0.3(Ph2SiO2/2)0.25(PhSiO3/2)0.45で表される分岐状メチルビニルフェニルポリシロキサン62重量部、式:
(ViMe2SiO(SiPhMeO)15)3SiPhで表される粘度が25℃で1200mPa・sの分岐状メチルビニルフェニルポリシロキサン17重量部、および式:(HMe2SiO)2SiPh2で表されるトリシロキサン21重量部を均一に混合した後、白金の1,3-ジビニル-1,1,3,3-テトラメチルジシロキサン錯体を本組成物に対して白金量が重量単位で5ppmとなる量を混合して25℃の粘度が8000mPa・sである架橋性オルガノポリシロキサン組成物を調製した。
平均単位式:(MeViSiO2/2)0.25(Ph2SiO2/2)0.3(PhSiO3/2)0.45で表される分岐状メチルビニルフェニルポリシロキサン63重量部、式:ViMe2SiO(PhMeSiO)38SiMe2Viで示される直鎖状オルガノポリシロキサン(一般式(1)で表されるシロキサン単位を有さない)17重量部、および式:(HMe2SiO)2SiPh2で表されるトリシロキサン20重量部を均一に混合した後、白金の1,3-ジビニル-1,1,3,3-テトラメチルジシロキサン錯体を組成物に対して白金量が重量単位で25ppmとなる量を混合して25℃の粘度が2500mPa・sである架橋性オルガノポリシロキサン組成物を調製した。
銀メッキ電極及びLED素子を備えたLED基板に、実施例1及び実施例2並びに比較例1及び比較例2で得られた組成物を塗布し、オーブンで150℃、3時間加熱し、当該組成物の硬化物によりLED素子が封止されたLED装置を作製した。作製したLED装置を、硫黄雰囲気下、80℃のオーブンに入れ、24時間後、銀メッキ電極を顕微鏡で観察した。銀メッキ電極に変色が見られない場合を「○」、銀メッキ電極が黒色に変化した場合を「×」と判定し、その結果を表1に示す。
Claims (9)
- (A)平均単位式:
(R1 3SiO1/2)a(R1 2SiO2/2)b(R1SiO3/2)c(SiO4/2)d (R2O1/2)e(式中、R1は炭素原子数1~14の一価炭化水素基であり、該一価炭化水素基のうち、少なくとも1個は炭素原子数2~6のアルケニル基であり且つ少なくとも1個はアリール基であり、該アリール基のうち、少なくとも1個はビフェニリル基であり、R2は水素原子または炭素原子数1~6のアルキル基を表し、a、b、c、d、およびeは、0≦a≦0.1、0.2≦b≦0.9、0.1≦c≦0.6、0≦d≦0.2、0≦e≦0.1、かつa+b+c+d+e=1を満たす数を表す。)で示される、ビフェニリル基を含有するアルケニル官能性分岐状オルガノポリシロキサン、
(B)一分子中に少なくとも2個のアルケニル基と、少なくとも1個のアリール基を有し、下記一般式(1)で表されるシロキサン単位を一分子中に少なくとも3個有する、アリール基を含有するアルケニル官能性分岐状オルガノポリシロキサン{(A)成分と(B)成分の比が1/100~100/1}、
R3 3SiO1/2 一般式(1)
(式中、R3は置換又は非置換の一価炭化水素基を表す。)
(C)一分子中に少なくとも2個のケイ素原子結合水素原子を有し、ケイ素原子結合有機基の12~70モル%がアリール基であるオルガノポリシロキサン{(A)成分中と(B)成分中のアルケニル基の合計に対する本成分中のケイ素原子結合水素原子のモル比が0.5~2となる量}、および
(D)ヒドロシリル化反応用触媒を含み、アルケニル官能性直鎖状オルガノポリシロキサンを含まない架橋性オルガノポリシロキサン組成物。 - 前記(A)成分が、平均単位式:(R1 2SiO2/2)b(R1SiO3/2)c(式中、R1、b及びcは請求項1と同義である。)で示される、ビフェニリル基を含有するアルケニル官能性分岐状オルガノポリシロキサンである請求項1に記載の架橋性オルガノポリシロキサン組成物。
- 前記(B)成分が、平均単位式:
(R4 3SiO1/2)f(R4 2SiO2/2)g(R4SiO3/2)h(SiO4/2)i(式中、R4は炭素原子数1~14の一価炭化水素基であり、該一価炭化水素基のうち、少なくとも2個は炭素原子数2~6のアルケニル基であり且つ少なくとも1個はアリール基であり、f、g、h、iは、0<f≦0.8、0≦g≦0.96、0<(h+i)、0.5≦f/(h+i)≦4、f+g+h+i=1を満たす数を表す。)で示される、アリール基を含有するアルケニル官能性分岐状オルガノポリシロキサンである請求項1又は請求項2に記載の架橋性オルガノポリシロキサン組成物。 - 前記(B)成分が、式:R5R6 2SiO(R6 2SiO)nSiR5R6 2(式中、R5は炭素原子数2~6のアルケニル基を表し、R6は炭素原子数1~14の一価炭化水素基であり、該一価炭化水素基のうち、少なくとも1個はアリール基であり、nは0以上200以下の整数を表す。)で示される、アリール基を含有するアルケニル官能性直鎖状オルガノポリシロキサンと、
式:(HR7 2SiO)jSiR7 (4-j)(R7は炭素原子数1~14の一価炭化水素基であり、jは3または4を表す。)で示されるケイ素原子結合水素原子を含有するシロキサンオリゴマーを、ヒドロシリル化反応してなる、生成物一分子中にアルケニル基を少なくとも3個有し、ケイ素原子結合水素原子が無い、アリール基を含有するアルケニル官能性分岐状オルガノポリシロキサンである請求項1又は請求項2に記載の架橋性オルガノポリシロキサン組成物。 - 前記(B)成分が25℃において粘度が20Pa・s以下の流動性を有する請求項1乃至請求項4のいずれか一項に記載の架橋性オルガノポリシロキサン組成物。
- 請求項1乃至請求項5のいずれか一項に記載の架橋性オルガノポリシロキサン組成物を硬化してなる硬化物。
- 25℃において屈折率が1.58以上の請求項6に記載の硬化物。
- 請求項6又は請求項7に記載の硬化物によりLED素子が封止されたLED装置。
- 前記(A)成分及び前記(C)成分を含む溶液と、前記(B)成分及び前記(D)成分を含む溶液とを混合することを含む、請求項1乃至請求項5のいずれか一項に記載の架橋性オルガノポリシロキサン組成物の調製方法。
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| KR20230042272A (ko) * | 2020-07-22 | 2023-03-28 | 신에쓰 가가꾸 고교 가부시끼가이샤 | 황화방지 코팅재료, 그의 경화물, 및, 전자디바이스 |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20190065248A (ko) | 2019-06-11 |
| TW201827526A (zh) | 2018-08-01 |
| CN109790385A (zh) | 2019-05-21 |
| CN109790385B (zh) | 2021-09-21 |
| JPWO2018061754A1 (ja) | 2019-09-05 |
| KR102404430B1 (ko) | 2022-06-02 |
| JP7158100B2 (ja) | 2022-10-21 |
| TWI758330B (zh) | 2022-03-21 |
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