Process for the manufacture of non-reverting elastomeric organop

Details Process for the manufacture of non-reverting elastomeric organop Process for the manufacture of non-reverting elastomeric organop

1978-04-05

1979-08-28

Marquis, Melvyn I.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 37SB, 528 18, 528 34, 528 42, 528 43, 528901, C08L 9100

Patent

active

041660536

ABSTRACT:
Heat-resistant, polyorganosiloxane elastomers are prepared by reacting a linear, difunctional polyorganosiloxane with a silicon-containing crosslinking agent and a stannous salt of a monoethylenically unsaturated monohydroxy monocarboxylic acid as the curing catalyst. A filler can optionally be included in the formulation. The present catalysts are unique in that they impart a relatively long working life to the uncured composition yet do not catalyze the depolymerization reaction at elevated temperatures as do conventional organotin catalysts such as dibutyltin dilaurate.

REFERENCES:
patent: 3127363 (1964-03-01), Nitzsche et al.
patent: 3349048 (1967-10-01), Vaughn, Jr.
patent: 3941856 (1976-03-01), Creasey et al.
patent: 3956209 (1976-05-01), Hamilton, Jr. et al.

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