Abstract: A method for distillation of organosilicon compounds that contain acryloxy or methacryloxy groups characterized by subjecting an organosilicon compound (A) that contains acryloxy or methacryloxy groups to distillation in the presence of a polymerization inhibitor (B) and a compound (C) with aliphatic conjugated unsaturated bonds.

Abstract: A process for preparing a silicone compound, the process comprising reacting (A) a silicon compound having silicon-bonded alkoxy groups or silicon-bonded aryloxy groups and (B) a disiloxane in the presence of (C) a carboxylic acid, (D) an acid catalyst, and (E) a carboxylic anhydride, and a process for preparing a silicone compound, the process comprising reacting (F) a silicon compound having silicon-bonded acyloxy groups and (B) a disiloxane compound in the presence of (D) an acid catalyst, (E) a carboxylic anhydride, and (G) an alcohol.

Abstract: A process for preparing a silicone compound, the process comprising reacting (A) a silicon compound having silicon-bonded alkoxy groups or silicon-bonded aryloxy groups and (B) a disiloxane in the presence of (C) a carboxylic acid, (D) an acid catalyst, and (E) a carboxylic anhydride, and a process for preparing a silicone compound, the process comprising reacting (F) a silicon compound having silicon-bonded acyloxy groups and (B) a disiloxane compound in the presence of (D) an acid catalyst, (E) a carboxylic anhydride, and (G) an alcohol.

Abstract: An organopolysiloxane-modified polysaccharide prepared by esterification reacting (A) an organopolysiloxane having residual carboxylic anhydride groups and (B) a polysaccharide having hydroxyl groups, wherein the organopolysiloxane is bonded to the polysaccharide through half ester groups, and a process for the preparation of organopolysiloxane-modified polysaccharide, in which component (A) and component (B) are subjected to an esterification reaction in the presence of (C) a non-protonic polar solvent. The organopolysiloxane-modified polysaccharide comprising polysaccharide and organopolysiloxane bonded thereto through half ester groups is novel. The process for the preparation of organopolysiloxane-modified polysaccharide permits introduction of organopolysiloxane into polysaccharide at a high introduction ratio.

Abstract: 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.

Abstract: A silalkylene oligosiloxane described by general formula 1

Abstract: A method for producing a basic amino acid-modified organopolysiloxane comprising reacting (A) a basic amino acid with (B) an organopolysiloxane having carboxylic anhydride groups bonded to silicon atoms.

Abstract: A process for the production of a cyclic siloxane described by formula (R1(CH3)SiO)d comprising reacting in the presence of an alkali catalyst a siloxane mixture comprising a silane or a linear siloxane described by general formula HO(R1(CH3)SiO)bH and a cyclic siloxane described by general formula (R1(CH3)SiO)c, where R1 is an alkenyl group having 6 to 14 carbon atoms, b is an integer of one or greater, c is an integer of 3 or greater, and d is an integer of 3 or greater.

Abstract: A curable organosiloxane composition comprising: (A) an organopolysiloxane having at least two silicon atom-bonded alkenyl groups per molecule; (B) an organopolysiloxane having at least two silicon atom-bonded hydrogen atoms per molecule; (C) a compound having an alkenyl group and a phenol residue of the formula: where R1 is an alkyl group or alkoxy group, a is 1 or 2, and b is an integer from 0 to 3; and (D) a hydrosilylation reaction catalyst.

Abstract: A method for synthesizing 1,3-dihydroxytetramethyldisiloxane comprising effecting the hydrolytic dehydrogenation of 1,1,3,3-tetramethyldisiloxane in the presence of water and a transition metal catalyst from Group VIII of the long-period form of the Periodic Table.

Abstract: A high-refractive-index optical silicone oil comprising a pentasiloxane having the formula RMe2SiO(Me2SiO)3SiMe2R wherein Me is methyl, each R is independently a C8 to C12 aralkyl, and the silicone oil has a refractive index of from 1.45 to 1.50 at 25° C.; a method of preparing a high-refractive-index optical silicone oil; a high-refractive-index optical silicone oil mixture comprising a pentasiloxane having the formula RMe2SiO(Me2SiO)3SiMe2R wherein Me is methyl, each R is independently a C8 to C12 aralkyl, and a disiloxane having the formula RMe2SiOSiMe2R wherein Me and R as defined above and wherein the mixture has a refractive index of from 1.45 to 1.50 at 25° C.; and a method of preparing a high-refractive-index optical silicone oil mixture.

Abstract: A thermally conductive silicone rubber composition, comprising (A) a curable organopolysiloxane (B) a curing agent; and (C) a filler prepared by treating the surface of a thermally conductive filler with an oligosiloxane having a formula selected from (i) (R1O)aSi(OSiR23)(4−a) and (ii) (R1O)aR2(3−a)SiO[R22SiO]nSi(OSiR23)bR2(3−b) wherein R1 is alkyl, each R2 is independently a monovalent hydrocarbon group free of aliphatic unsaturation, subscript a is an integer from 1 to 3, b is an integer from 1 to 3, and n is an integer having a value greater than or equal to 0.

Abstract: An oligosiloxane having the formula (R1O)aSi(OSiR22R3)4−a wherein R1 is alkyl; each R2 is independently selected from C1 to C10 monovalent hydrocarbyl free of aliphatic unsaturation; R3 is hydrocarbly free of aliphatic unsaturation and having at least 11 carbon atoms; and a is 1, 2, or 3; and a method of preparing an alkoxy-functional oligosiloxane.

Abstract: A high-refractive-index optical silicone oil comprising a pentasiloxane having the formula RMe2SiO(Me2SiO)3SiMe2R wherein Me is methyl, each R is independently a C8 to C12 aralkyl, and the silicone oil has a refractive index of from 1.45 to 1.50 at 25° C.; a method of preparing a high-refractive-index optical silicone oil; a high-refractive-index optical silicone oil mixture comprising a pentasiloxane having the formula RMe2SiO(Me2SiO)3SiMe2R wherein Me is methyl, each R is independently a C8 to C12 aralkyl, and a disiloxane having the formula RMe2SiOSiMe2R wherein Me and R as defined above and wherein the mixture has a refractive index of from 1.45 to 1.50 at 25° C.; and a method of preparing a high-refractive-index optical silicone oil mixture.

Abstract: A curable organopolysiloxane composition, comprising (A) an organopolysiloxane containing an average of at least 2 alkenyl groups and at least 2 silicon-bonded hydrogen atoms per molecule; (B) a compound containing alkenyl and hydroxyphenyl groups in each molecule, and (C) a hydrosilylation catalyst. A product formed by curing the organopolysiloxane composition and a unified article comprising a substrate and a product formed by curing the organopolysiloxane, wherein the substrate is unified into a single integral body with the cured product.

Abstract: A thermally conductive silicone rubber composition comprising (A) a curable organopolysiloxane, (B) a curing agent, and (C) a thermally conductive filler surface treated with (D) a silalkylene oligosiloxane described by formula 1

Abstract: A method for producing a basic amino acid-modified organopolysiloxane comprising reacting (A) a basic amino acid with (B) an organopolysiloxane having carboxylic anhydride groups bonded to silicon atoms.

Abstract: A novel carbosiloxane dendrimer is disclosed containing a radically polymerizable group in the molecule and which possesses excellent polymerization reactivity. The carbosiloxane dendrimer can be used to provide organic polymers as afforded by the polymerization of the carbosiloxane dendrimer either alone or with other organic monomers. The radically polymerizable group-functional carbosiloxane dendrimer with the general formula (R1 is C1 to C10 alkyl or aryl, R2 is a divalent organic group excluding C1 to C10 alkylene, b is 1 to 3, X1 is a silylalkyl group, and Y is a radically polymerizable group). Also, dendrimer-containing organic polymer as afforded by the polymerization of (A) the aforesaid carbosiloxane dendrimer and (B) radically polymerizable organic monomer.

Abstract: This invention relates to a macromonomer and a method for its preparation. The macromonomer has one or more silicon-bonded hydrogen atoms at one molecular chain terminal, and one or more aliphatically unsaturated silicon-bonded organic groups at the other molecular chain terminal. This invention further relates to a method of forming a hyperbranched polymer by polymerizing the macromonomer with a group VIII metal catalyst. The hyperbranched polymers can be used as surfactants, gelling agents, drug delivery systems, and polymeric absorbents.

Abstract: A method for synthesizing 1,3-dihydroxytetramethyldisiloxane comprising effecting the hydrolytic dehydrogenation of 1,1,3,3-tetramethyldisiloxane in the presence of water and a transition metal catalyst from Group VIII of the long-period form of the Periodic Table.