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:
Sep. 21, 1993
Filed:
Feb. 08, 1993
Applicant:
Inventors:
Paul C Dinh, Midland, MI (US);
Peter Y Lo, Midland, MI (US);
Assignee:
Dow Corning Corporation, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ;
U.S. Cl.
CPC ...
556443 ; 556446 ; 556448 ;
Abstract
The present invention is a method for separating silyl ketene acetals from carbonyl by-products having a terminal olefinic bond and a boiling point similar to that of the silyl ketene acetals. The method employs a platinum catalyst which specifically effects hydrosilation of the carbonyl by-product's terminal olefinic bond by an organohydrosilane. The platinum catalyst is the reaction product of hexachloroplatinic acid and sym-tetramethyldivinyldisiloxane. In a preferred method the silyl ketene acetal is separated from the hydrosilated carbonyl by-product by distillation.