Platinum catalyst, its preparation, and curable organopolysiloxa

Details Platinum catalyst, its preparation, and curable organopolysiloxa Platinum catalyst, its preparation, and curable organopolysiloxa

1996-11-20

1998-08-11

Griffin, Walter D.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Organic compound containing

502150, 502159, 502171, 502232, 502258, 502261, 502262, 502334, B01J 3102

Patent

active

057927235

ABSTRACT:
A platinum catalyst containing (A) a platinum complex having a vinyl-containing organosiloxane ligand and (B) a vinyl-containing organopolysiloxane is prepared by mixing components (A) and (B) such that at least 2 mol of vinyl group in component (B) is available per mol of platinum atom in component (A) and heating the mixture at 40.degree.-100.degree. C. for at least 1 hour. When blended in an addition reaction curing type organosiloxane composition, the platinum catalyst has the advantage that even after long-term storage at elevated temperatures, it remains stable and active enough to cause the organosiloxane composition to cure.

REFERENCES:
patent: 3699072 (1972-10-01), Wada et al.
patent: 3715334 (1973-02-01), Karstedt
patent: 3775452 (1973-11-01), Karstedt
patent: 4421903 (1983-12-01), Ashby

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