Method for removal for ionic chloride from hydroxyl-terminated siloxanes

U.S. Patent Number: 5276173

Abstract: The present invention is a method for reducing the ionic chloride content of hydroxyl-terminated siloxanes. The method involves contacting the hydroxyl-terminated siloxanes with a molecular sieve effective in removing residual water from the siloxanes. Since ionic chloride strongly partitions into the water phase, ionic chloride is removed along with the water phase. In a preferred embodiment of the present method as aprotic solvent is employed to facilitate water removal from the hydroxyl-terminated siloxanes.

Inventors: Marko; Ollie W. (Carrollton, KY), Steinmeyer; Robert D. (Carrollton, KY)

Assignee: Dow Corning Corporation (Midland, MI)

Application Number: 07/956,223

Issued: 1994-01-04

Expired: 2006-01-04

Classes: 556/459

Field of search: 556/459

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