Method for preparation of alkoxysilanes having reduced halide
AssigneeDow Corning Corporation
InventorsRobert N. Phillips, Charles L. Worcester
Life of this patent
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Abstract
Polysiloxane hydrolyzates are neutralized by treating polysiloxane hydrolyzates containing residual acidic constituents with carbon, and then the carbon is removed from the treated neutralized polysiloxane hydrolyzate. Some examples of polysiloxane hydrolyzates that can be treated are hydride functional polysiloxane hydrolyzates and polydiethylsiloxane hydrolyzates. The carbon neutralizing agent especially preferred is carbon derived from bituminous coal. The carbon is removed from the treated neutralized polysiloxane hydrolyzate by passing it through solid liquid separation devices such as plate and frame filter presses, polishing filters, and post filters for removing fines.
Claims9
A method of neutralizing a polysiloxane hydrolyzate comprising treating a polysiloxane hydrolyzate containing residual acidic constituents with carbon selected from the group consisting of coke, charcoal, carbon derived from bituminous coal, carbon derived from anthracite coal, carbon derived from lignite, carbon derived from wood, carbon derived from peat, and carbon derived from coconut shells, and separating the carbon from the treated neutralized polysiloxane hydrolyzate.
Dependencies are inferred from the claim text.