Shin-etsu Chemical Co., Ltd.

Masayuki Takahashi

Masaaki Yamaya

Hideyoshi Yanagisawa

Toshio Yamazaki

Kazuharu Sato

Hiroshi Yoshioka

Shoji Ichinohe

Akinari Itagaki

Takanori Katou

Organic silicon compounds having an alkoxy group at one end and an alkali metal salt of sulfonic acid or sulfuric acid at the other end are novel. They can be obtained by effecting hydrosilylation reaction between an alkoxyhydro-silane and a compound having an alkenyl group at one end and an alkali metal salt of sulfonic acid or sulfuric acid at the other end. They are useful as a modifier and surface treating agent.

Organic silicon compounds and process of making

A process for removing acidic impurities from alkoxysilanes obtained from halogenosilanes and alcohols which inevitable contain small amounts of acidic impurities is described. In the process, at least one member selected from alkali metal salts of alcohols and amines having a great steric hindrance as having a bulky substituent is added to the alkoxysilane for a time sufficient to neutralize the acidic impurities and the mixture is purified by distillation to obtain a substantially acidic impurity-free alkoxysilane.

Process for removing acidic impurities from alkoxysilanes

Disclosed in a novel organosilane compound represented by the general formula

Organosilicon compound

The platinum catalyst composition comprises a diolefin component represented by the following general formula

Platinum catalyst composition and process for producing the same

Amino group-containing silicon compounds having at least two aromatic rings and hydrochlorides thereof are effective modifiers for composite materials for improving soldering heat resistance and heat shock resistance.

Modifier for composite materials

The platinum catalyst composition comprises a diolefin component represented by the following general formula:

A primer composition comprising a product of the reaction between an organosilane compound of the following general formula (A) and a phenyl group-free organic diisocyanate compound to acquire a high curing speed and excellent adhesiveness to both inorganic and organic materials and to resist generation of stain after curing: ##STR1## wherein R.sup.1 represents a monovalent hydrocarbon residue containing 1 to 4 carbon atoms; R.sup.2 represents a divalent hydrocarbon residue containing 1 to 4 carbon atoms; and n represents 0, 1 or 2.

Low stainable primer composition and method of producing the same

The primer composition of the invention is particularly useful as an undercoating composition for a protective overcoating formed with a silicone-based coating composition containing a colloidal silica powder in respect of the excellent adhesion, heat resistance, resistance against hot water and weatherability of the overcoating layer. The primer composition essentially comprises two components including (a) 100 parts by weight of a copolymer of a monomer mixture composed of (a-1) from 2 to 50% by weight of an ethylenically unsaturated monomeric compound having, in a molecule, an alkoxysilyl group and (a-2) from 98 to 50% by weight of an ethylenically unsaturated monomeric compound free from alkoxysilyl groups and copolymerizable with the monomeric compound (a-1); and (b) from 5 to 300 parts by weight of an amidated product obtained by the reaction of a halide, anhydride or isopropenyl ester of a carboxylic acid and a product obtained by the reaction of an amino group-containing alkoxysilane compound, an epoxy group-containing alkoxysilane compound and a silylating agent.

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Annaka, Japan

Masayuki Takahashi