Dow Corning Toray Silicone Company Limited

Toray Silicone Company Limited

Masahiko Suzuki

Toshio Saruyama

Isao Ona

Masaru Ozaki

Takeshi Imai

Keiichi Kishimoto

Shosaku Sasaki

Yoshinobu Koda

Shuzo Toida

Ikuzo Takahashi

Toshio Surayama

To provide a high-purity platinum complex catalyst composition that has an excellent storage stability, is easy to handle, and has a high catalytic activity. Also, to provide a process for the preparation of this platinum complex catalyst composition and provide a microparticulate thermoplastic resin catalyst composition.

Platinum complex catalyst composition, process for the preparation

The present invention relates to an organopolysiloxane emulsion composition comprising a hydroxy or alkoxy-endblocked diorganopolysiloxane, an alkoxy-group containing organosilicon compound, surfactant, and water. The compositions of this invention are characterized by a lack of offensive odor, high productivity and good storage stability. The organopolysiloxane emulsions of this invention are useful as fiber treatment agents. The fibers treated with the organopolysiloxane emulsion of this invention exhibit good feel.

Organopolysiloxane emulsions and fibers coated therewith

Oranopolysiloxane emulsions and fibers coated therewith

Vinyl- and alkoxy-functional organosilicon compounds with the general formula ##STR1## in which R denotes C.sub.1 and C.sub.4 alkyl and a is 1, 2, or 3, b is 0 or 1, and a+b is 2 or 3 are made by an exchange reaction between sym-divinyltetramethyldisiloxane and vinyltrialkoxysilane or tetraalkoxysilane. These novel vinyl- and alkoxy-functional organosilicon compounds exhibit a high condensation reactivity with the silanol group.

Vinyl- and alkoxy-functional organosilicon compounds and method for the

A method for purifying impure hexamethyldisiloxane comprising as a major portion hexamethyldisiloxane and as a minor portion a mixture of low-boiling organic solvents, other organosilicon compounds, and odor-producing materials is described. The method comprises (A) first, treating the impure hexamethyldisiloxane with a condensation catalyst to convert the organosilicon compounds to additional hexamethyldisiloxane; (B) second, washing the treated impure hexamethyldisiloxane with water; (C) third, separating a water phase from the washed impure hexamethyldisiloxane; (D) fourth, distilling the washed impure hexamethyldisiloxane to yield hexamethyldisiloxane of enhanced purity; (E) fifth, contacting the hexamethyldisiloxane of enhanced purity with acid clay at a temperature of greater than about 50.degree. C.; and (F) finally, contacting the acid clay treated hexamethyldisiloxane of enhanced purity treated in (E) with activated carbon to yield hexamethyldisiloxane with enhanced purity and minimal unpleasant odor.

Method for purifying hexamethyldisiloxane

A process having the characteristic that a silicon compound having at least one hydrogen atom directly bonded to silicon in each molecule is addition reacted with an organic compound having at least one aliphatic double bond in each molecule in the presence of a platinum catalyst and an amide compound with the formula, RCONR.sup.1 R.sup.2. The presence of the amide maximizes the yield of the desired beta-adduct and minimizes the yield of the alpha-adduct.

Addition reaction method

What is disclosed is a composition of matter which is curable at room-temperature in the presence of moisture which consists of a hydroxylated polyorganosiloxane and a novel cross-linker which is a mixture of an acetoxysilane and an acetoxysiloxane.

Room-temperature moisture-curing silicone elastomer compositions and a

A reaction product of an alkali metal siloxanolate having at least three organosiloxane units per molecule with a cerium salt of an organic carboxylic acid or cerium chloride and an organic carboxylic acid salt or alkoxy compound of zirconium, titanium or iron are added to organosiloxane polymers to improve the heat-stability of the polymer.

Growing community of inventors

Ichihara, Japan

Masahiko Suzuki