Catalysts for hydrosilylation reactions

US5523436A · kind A · utility

Assignee

• Wacker Chemie AG · DE

Inventors

• Jochen Dauth · Burghausen, DE
• Udo Peetz · Burghausen, DE
• Bernward Deubzer · Burghausen, DE

Key dates

• Filing date: Dec 10, 1993
• Grant date: Jun 4, 1996
• Expiry date: Dec 10, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G77/20
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Novel catalysts of the general formula EQU MX.sub.a Y.sub.b, in which PA1 M is Pt, Pd, Rh, Ru, Os or Ir, PA1 X is a triazene, tetrazene, tetrazadiene or pentazadiene ligand, PA1 Y is a ligand selected from Cl, Br, I, NH.sub.3, P(C.sub.2 H.sub.5).sub.3, P(C.sub.6 H.sub.5).sub.3, H, CO, 1,5-cyclooctadiene, pyridine, bipyridine, acetate, acetylacetonate, phenylnitrile, ethylenediamine, acetonitrile, 2,5-norbornadiene, nitrate, nitrite, H.sub.2 O, benzene, diphenylphosphinoethane and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane, PA1 a is 1, 2, 3 or 4 and PA1 b is 0 or an integer from 1 to 6, are described. The catalysts promote the addition of Si-bonded hydrogen onto an aliphatic multiple bond, in which the catalysts are activated by heating at temperatures of 50.degree. to 250.degree. C., by irradiation with light, by addition of Bronsted acids and/or by addition of acid-forming agents. The catalysts are used in addition crosslinking organopolysiloxane compositions and for the reaction of organosilicon compounds containing Si-bonded hydrogen atoms with organic compounds containing aliphatic multiple bonds.