Union Carbide Corporation

Union Carbide Chemicals & Plastics Technology Corporation

Kunj R Mehta

James D Reedy

Bernard Kanner

Jennifer M Quirk

Paul E Austin

David D Farris

Arthur P De Monte

Richard A Lehew

A process and a catalytic composition for carrying out a platinum catalyzed hydrosilylation reaction between an SiH-containing material and a terminal olefin. The process of the invention involves heating the reactants in the presence of a platinum catalyst and a promoter which is a hindered amine or phosphine, or acid salt thereof, the promoter containing at least 6 carbon atoms and having the formula ##STR1## Q is N or P; when Q is N, R is H, alkyl of 1-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof; when Q is P, R is alkyl of 1-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof; x is 0 or 1; R' is alkyl of 1-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof; y is 0, 1, or 2; R' is a branched group having a 2.degree. or 3.degree. carbon atom bonded directly to Q, and is alkyl of 3-18 carbon atoms, nonterminal alkenyl of 4-18 carbon atoms, arylalkyl of 7-25 carbon atoms, or a derivative thereof; z is 1, 2, or 3 and z=3-x-y; and two R' groups, two R' groups, or one R' and one R' may be taken together to constitute a divalent moiety forming a 5-7 membered ring containing a Q atom. The catalytic composition comprises a catalytically active platinum-containing material and a promoter as defined above.

Process and composition for promoting hydrosilylation reactions using

An improved process is provided for the preparation of siloxane-oxyalkylene copolymers by a solventless process via hydrosilation of oxyethylene-rich polyethers in the presence of carboxylic acids or carboxylic acid salts as a catalyst modifier. The use of a carboxylic acid or salt prevents acetal formation through the hydroxyl groups of the polyether and/or copolymer. The use of solvent, acetal treatment and solvent stripping steps of the conventional processes are eliminated and accordingly, environmental as well as economic benefits are achieved.

Process for the preparation of siloxane-oxyalkylene copolymers

A process for preparing vinylaminosilanes in which an aminosilane of the formula HSi(NRR').sub.x (R').sub.3-x is reacted with an alkyne of the formula R''C.tbd.CH in which R and R' are each saturated or unsaturated aliphatic hydrocarbon radicals or an aromatic hydrocarbon radical, R' and R'' are the same or different and are each hydrogen or R and x is an integer from 1 to 3, in the presence of a platinum hydrosilation catalyst at reaction temperatures above about 180.degree. C.

Process for preparing vinylaminosilanes

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Parkersburg, WV, United States of America

Kunj R Mehta