摘要:
A composition includes: (I) an alkenyl functional, phenyl-containing polyorganosiloxane, an Si—H functional phenyl-containing polyorganosiloxane, or a combination thereof; (II) a hydrogendiorganosiloxy terminated oligodiphenylsiloxane having specific molecular weight, an alkenyl-functional, diorganosiloxy-terminated oligodiphenylsiloxane having specific molecular weight, or a combination thereof; and (III) a hydrosilylation catalyst. A light emitting device is made by applying the composition onto a light source followed by curing. The composition provides a cured material with mechanical properties suited for use as an encapsulant for a light emitting device.
摘要:
A method of manufacturing a layered silicone composite material comprising the steps of: applying a second addition-curable organopolysiloxane composition that contains a second adhesion promoter onto a first silicone layer that is formed by curing a first addition-curable organopolysiloxane composition containing a first adhesion promoter and where the first silicone layer has a hardness of less than JIS A 50; and forming a second silicone layer that has hardness of JIS A 50 or more by curing said second addition-curable organopolysiloxane composition.
摘要翻译:一种制备层状硅氧烷复合材料的方法,包括以下步骤:将含有第二粘合促进剂的第二可加成固化的有机聚硅氧烷组合物施加到通过固化含有第一粘合促进剂的第一可加成固化的有机聚硅氧烷组合物形成的第一硅氧烷层上 并且其中第一硅氧烷层具有小于JIS A 50的硬度; 并通过固化所述第二可加成固化的有机基聚硅氧烷组合物形成硬度为JIS A 50或更高的第二硅氧烷层。
摘要:
A curable silicone composition comprising at least the following components: (A) a diorganopolysiloxane having in one molecule at least two alkenyl groups; (B) at least two resin-like organopolysiloxanes that have different mass-average molecular weights as reduced into standard polystyrene measured gel permeation chromatography and that are composed of SiO4/2 units, R12R2SiO1/2 units, and R13SiO1/2 units, wherein R1 is an optionally substituted univalent hydrocarbon group that is free of aliphatic unsaturated bonds and R2 is an alkenyl group; (C) an organopolysiloxane that contains in one molecule at least two silicon-bonded hydrogen atoms; and (D) a hydrosilylation catalyst; possesses excellent flowability and filling ability and that can be prepared without extreme viscosity even if the composition contains resin-like organopolysiloxanes required to form a cured silicone body of appropriate strength and hardness.
摘要:
A heat-conductive silicone composition comprising at least (A) an organopolysiloxane, (B) a heat-conductive filler, and (C) a specific organosiloxane. The silicone composition is excellent in handleability, even when it contains a large amount of a heat-conductive filler for the purpose of attaining higher heat conductivity.
摘要:
A curable organopolysiloxane composition comprising (A) a linear organopolysiloxane having at least two alkenyl groups and at least one aryl group per molecule, (B) a branched organopolysiloxane having at least one alkenyl group and at least one aryl group per molecule, and having siloxane units represented by the general formula: RsiO2/3, (C) a linear organopolysiloxane with both terminal ends of the molecular chain blocked by silicon bonded hydrogen atoms having at least one aryl group per molecule, and (D) a hydrosilation reaction catalyst, and a semiconductor device whose semiconductor elements are coated with the cured product of the above-described composition. The curable organopolysiloxane composition shows low viscosity, excellent filling properties, and excellent curability that cures to form a soft cured product of a large refractive index, high light transmittance, and high adhesion to substrates, as well as the semiconductor device shows superior reliability.
摘要:
A silicone gel composition is characterized by excellent storage stability in a non-cured state and by high adhesion to a substrate and long-term stability of consistency at elevated temperatures after curing. The silicone gel composition comprises: a polyorganosiloxane (A), which consists of polyorganosiloxane (A-1) that contains R(CH3)2SiO2/2 units, RsiO3/2 units R(CH3)2SiO1/2 units, and polydiorganosiloxane (A-2) that contains R(CH3)2SiO2/2 units and R(CH3)2SiO1/2 units, and R(CH3) which contains in one molecule two silicon-bonded hydrogen atoms; an addition-reaction platinum catalyst (C); an organosilicon compound (D) selected from silane of the general formula (R1O)nSiR24-n or a partially hydrolyzed condensate thereof; and an organic titanium compound (E).
摘要:
A curable silicone composition cures to form a silicone cured product with improved fire-retarding properties. The composition comprises a hydrosilylation-reaction curable silicone composition Fire-retarding properties are imparted to the composition using a silica powder with a specific surface area of not less than 50 sq. m/g and a diamine compound. The cured product is preferably a silicone gel.
摘要:
An organocyclosiloxane is disclosed which has both silicon-bonded alkoxy groups and organofunctional groups within each molecule. This cyclic siloxane finds utility as a coupling agent and has the general formula ##STR1## wherein R.sup.1 is independently selected from the group consisting of a monovalent hydrocarbon group having 1 to 8 carbon atoms and a monovalent halogen-substituted hydrocarbon group having 1 to 8 carbon atoms, R.sup.2 is selected from the group consisting of an alkoxy group and an alkoxysilylalkyl group, R.sup.3 is an organofunctional group selected from the group consisting of glycidoxyalkyl groups, methacryloxyalkyl groups, N-(trialkylsilyl)aminoalkyl groups, (hydroxyphenyl)alkyl groups, and haloalkyl groups and n and m each represent an integer having a value of 1 to 6 with the proviso that n+m is an integer with a value of 3 to 8.
摘要:
The present invention relates to novel alkylamino-substituted organosilicon compounds and a method for their preparation. The described process involves a dehydrohalogenation reaction between a triorganosilylalkyl halide and an aminophenol in the presence of a hydrogen halide acceptor.
摘要:
A curable organopolysiloxane composition and an optical semiconductor element sealant, each comprising (A) a diorganopolysiloxane that has at least 2 alkenyl groups wherein at least 70 mole % of all the siloxane units are methylphenylsiloxane units and the total content of 1,3,5-trimethyl-1,3,5-triphenylcyclotrisiloxane and 1,3,5,7-tetramethyl-1,3,5,7-tetraphenylcyclotetrasiloxane is no more than 5 weight %, (B) an organopolysiloxane that has at least 2 silicon-bonded hydrogen atoms wherein at least 15 mole % of the silicon-bonded organic groups are phenyl groups, and (C) a hydrosilylation reaction catalyst. An optical semiconductor device in which an optical semiconductor element within a housing is sealed with the cured product from the aforementioned composition.