Method of making dialkali metal silanolates and siloxanolates

Details Method of making dialkali metal silanolates and siloxanolates Method of making dialkali metal silanolates and siloxanolates

1998-12-01

1999-10-19

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Silicon containing

556450, C02F 708

Patent

active

059691735

ABSTRACT:
Dialkali metal organosilanolate and dialkali metal organosiloxanolate salts are manufactured from cyclic siloxanes or linear silicone polymers using a heterogeneous interfacial reaction process. A stoichiometric excess of an alkali metal hydroxide such as potassium hydroxide or an alkali metal oxide as a solid or dissolved or dispersed in a compatible solvent, is prepared and used as a first phase. The cyclic siloxane or linear silicone polymer is placed in a second phase either dissolved or dispersed in another solvent which is immiscible with the first phase. The resulting silanolate and siloxanolate salts can be used as monomers for solid-liquid phase and liquid-liquid phase interfacial polymerization or in a polycondensation process for the synthesis of alternating siloxane polymers. They can also be used as ring opening initiators for the base catalyzed polymerization of cyclic siloxanes.

REFERENCES:
patent: 5629401 (1997-05-01), Graiver
patent: 5637668 (1997-06-01), Gravier
patent: 5856546 (1999-01-01), Graiver

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