The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 03, 1978
Filed:
Oct. 18, 1976
Applicant:
Inventors:
Richard N Lewis, Tecumseh, MI (US);
Eugene R Martin, Onsted, MI (US);
Assignee:
SWS Silicones Corporation, Adrian, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
2604 / ;
Abstract
Alpha,omega-siloxanediols are prepared from siloxanes by a two-step process. In the first step, the siloxane is converted to a linear alpha,omega-diacyloxysiloxane by heating with an acid anhydride and a carboxylic acid in the presence of acid clay. The diacyloxysiloxane is hydrolyzed to the siloxanediol by heating with an aqueous solution of a weak base.