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US 5,688,888 AGranted
Peralkylated phosphazene base-catalyzed silanol condensation method
AssigneeGeneral Electric Company
InventorsFrank Steven Burkus, II, Krzysztof Matyjaszewski, Slawomir Rubinsztajn
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Abstract
Organopolysiloxane oils and gums are produced by the condensation of silanol-terminated organosiloxane in the presence of an effective amount of a peralkylated phosphazene base as a catalyst and at reduced pressure.
Claims7
A method for effecting polycondensation which comprises contacting, at a temperature in the range of about 0.degree.-200.degree. C. and a pressure up to about 350 torr, a silanol-containing organosiloxane with an amount of a peralkylated phosphazene base which is effective for polycondensation of said organosiloxane.
Dependencies are inferred from the claim text.