Catalysts for hydrosilylation reactions

Details Catalysts for hydrosilylation reactions Catalysts for hydrosilylation reactions

C - Chemistry, Metallurgy

07

F

C07F 15/00 (2006.01) B01J 31/16 (2006.01) B01J 31/18 (2006.01) B01J 31/22 (2006.01) B01J 31/24 (2006.01) C07C 245/22 (2006.01) C07C 245/24 (2006.01) C07C 255/65 (2006.01) C08G 77/38 (2006.01) C08J 3/24 (2006.01) C08K 5/56 (2006.01) C08L 83/04 (2006.01)

Patent

CA 2111643

Novel catalysts of the general formula MXaYb, in which M is Pt, Pd, Rh, Ru, Os or Ir, X is a triazene, tetrazene, tetrazadiene or pentazadiene ligand, Y is a ligand selected from Cl, Br, I, NH3, P(C2H5)3, P(C6H5)3 H, CO, 1,5-cyclooctadiene, pyridine, bipyridine, acetate, acetylacetonate, phenylnitrile, ethylenediamine, acetonitrile, 2,5-norbornadiene, nitrate, nitrite, H2O, benzene, diphenylphosphinoethane and 1,3-divinyl-1,1,3,3- tetramethyldisiloxane, a is 1, 2, 3 or 4 and 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 to 250°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 organopoly- siloxane compositions and for the reaction of organosilicon compounds containing Si-bonded hydrogen atoms with organic com- pounds containing aliphatic multiple bonds.

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