Abstract: The instant invention pertains to a method for producing polydiorganosiloxanes wherein the method comprises contacting (A) at least one organosilicon compound having in the molecule at least one silanol group and/or (C) triorganosilyl endblocker and (D) a diorganocyclicsiloxane with (B) a cation exchanged acid treated montmorillonite clay. The polydiorganosiloxanes produced by the method of this invention have less branching along the siloxane chain than those polydiorganosiloxanes produced by other methods.
Abstract: Curable silicone caulking compositions are provided, employing an ionically polymerized silicone emulsion, a tetrafunctional organosilane, a tin condensation catalyst, calcium carbonate and tetramethylbutylguanidine, as a shelf stabilizer.
Type:
Grant
Filed:
May 31, 1988
Date of Patent:
March 21, 1989
Assignee:
General Electric Company
Inventors:
Judith Stein, Tracey M. Leonard, Sandra L. Pratt
Abstract: Thixotropic silicates and stable emulsions are produced by reacting a salt-forming compound such as mineral acids and a powdered natural silicate in a liquid organic compound. The thixotropic silicate such as minerals containing silicates may be utilized to produce stable organic compound-silicate emulsion, as an anti-sag material, as a filler and as a thickener. It may be further chemically reacted along with the organic compound to produce useful foams, resins, coating agents and fillers.
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