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Title: Methods for preparing cyclopolysiloxanes

Abstract: Cyclic methyl polysiloxanes can be prepared by hydrolysis of dimethyldichlorosilane and aqueous hydrochloric acid in the presence of a normal C6-16 alkyl sulfonic acid to give good yields of cyclic polysiloxanes and minimal amounts of linear silanols.


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Inventors: Williams Jr., Robert E. (Scotia, NY)

Application Number: 06/408103
Filing Date: 1982-08-16
Publication_date: 1983-10-25
Assignee: GEN ELECTRIC (US)

Primary Class(es): 556/460
Other Classes: C07F7/21; C07F7/00; C07F7/08
US Patent Ref:
2860152November, 1958Fletcher556/460Method of producing cyclic diorganosiloxanes
3398173August, 1968Goossens556/460Process for producing siloxanes
3590064June, 1971Lacefield556/460
3763212October, 1973McEntee et al.556/460
3983148September, 1976Reedy et al.556/460Process for producing cyclic siloxanes
4276425June, 1981Burkhardt et al.556/460Process for preparing cyclic dimethylpolysiloxanes

Other Refs:
Primary Examiner: Shaver, Paul F.
Assistant Examiner:
Attorney: Pittman, William H.
Davis Jr., James C.
Magee Jr., James
Claims: