Siloxane fluid from methylchlorosilane residue waste
AssigneeGeneral Electric Company
InventorsRobert G. Stank, Luisito A. Tolentino, Alan Ritzer, Frank J. Traver
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Abstract
Siloxane fluids containing novel siloxane polymers prepared from mixtures of disilanes, disiloxanes and silylmethylenes, and a method for recovering fully alkylated linear and cyclic siloxanes with disilane, disiloxane and silylmethylene bonds, such as from methylchlorosilane residue cleavage bottoms, are disclosed.
Claims19
A silicone fluid comprising a siloxane polymer having the following general formula:
- ##STR8## wherein X represents an alkyl group or a siloxane branch;
- a is an integer greater than 0;
- b and c are 0 or integers greater than 0;
- provided that b and c are both not 0;
- and wherein a, b and c are randomly ordered on the polymer backbone and a viscosity adjuster selected from the group consisting of monomeric organofunctional silanes.
A process for the preparation of a silicone fluid comprising a siloxane polymer having the following general formula:
- ##STR9## wherein X represents an alkyl group or a siloxane branch;
- a is an integer greater than 0;
- b and c are 0 or integers greater than 0;
- provided both b and c are not 0;
- and wherein a, b and c are randomly ordered on the polymer backbone;
- said process comprising (i) hydrolyzing a mixture of disilanes, disiloxanes and silylmethylenes derived from a methylchlorosilane synthesis operation, (ii) stripping the silicone fluid to obtain a stripped fluid, (iii) adding to the stripped fluid a viscosity adjuster and (iv) recovering the volatile fluid.
A process for recovering fully alkylated linear or cyclic siloxanes with disilane, disiloxane or silylmethylene bonds from a residue or portion of a residue from the direct synthesis of alkylhalosilanes comprising hydrolyzing said residue;
- separating a volatile fraction from said hydrolyzed residue;
- and recovering linear or cyclic siloxanes with disilane, disiloxane or silylmethylene bonds from said volatile fraction.
Dependencies are inferred from the claim text.