Method of preparing phosphonium siloxanes and products thereof

Details Method of preparing phosphonium siloxanes and products thereof Method of preparing phosphonium siloxanes and products thereof

1975-01-02

1977-02-15

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2604482R, C07F 718

Patent

active

040082610

ABSTRACT:
Phosphorus-containing catalysts that are suitable for polymerizing polyorganosiloxanes are prepared from tetraorgano phosphonium halides, a basic compound, such as sodium hydroxide, and an organosilicon compound. The catalyst must be prepared at a temperature of at least 30.degree. C. The catalysts are moisture sensitive but possess improved shelf-life stability. They are used to polymerize polyorganosiloxanes and can subsequently be inactivated by heating to a temperature above approximately 130.degree. C. for a suitable length of time.

REFERENCES:
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patent: 2739952 (1956-03-01), Linville
patent: 2789109 (1957-04-01), Grubb, Jr.
patent: 2830967 (1958-04-01), Nitzsche et al.
patent: 2908699 (1959-10-01), Jex et al.
patent: 2934550 (1960-04-01), Jack
patent: 3057821 (1962-10-01), Boot
patent: 3271359 (1966-09-01), Bluestein

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