Organopolysiloxane composition curable by hydrosilylation contai

Details Organopolysiloxane composition curable by hydrosilylation contai Organopolysiloxane composition curable by hydrosilylation contai

1986-11-20

1988-05-03

Marquis, Melvyn I.

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Of silicon containing

427387, 528 15, 528 31, 528 32, 525478, B32B 904

Patent

active

047419660

ABSTRACT:
Novel platinum/olefin complexes, useful for the hydrosilylation curing catalysis of hardenable organopolysiloxane compositions, are facilely prepared by reacting a platinum halide with at least one alkali or alkaline earth metal carbonate or bicarbonate in the presence of an aliphatic triene ligand having the general formula: ##STR1## wherein R.sub.1 is a linear or branched chain alkyl radical having from 1 to 6 carbon atoms, and R.sub.2 is R.sub.1 or a linear or branched chain alkenyl radical having from 2 to 16 carbon atoms and at least one site of ethylenic unsaturation, and said complex having a ratio, in gram-atoms of halogen to gram-atoms of platinum, ranging from virtually 0 to 4.

REFERENCES:
patent: 4051454 (1977-09-01), Leiser et al.
patent: 4699813 (1987-10-01), Cavezzan

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