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:
Apr. 16, 2002
Filed:
Dec. 04, 1998
Applicant:
Inventor:
Rudolph A. Cameron, Vienna, WV (US);
Assignee:
Crompton Corporation, Greenwich, CT (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 7/708 ; C08G 7/746 ;
U.S. Cl.
CPC ...
C08G 7/708 ; C08G 7/746 ;
Abstract
This invention disclosure describes an improved process for the preparation of siloxane-oxyalkylene copolymers via hydrosilation of unsaturated polyethers with organohydrogensiloxanes in the presence of hydroxyl, carbonyl, or ether-functional amines as buffer-catalyst modifiers for noble metal hydrosilation catalysts. The common side reactions such as dehydrocondensation and acetal formation are significantly reduced or eliminated, by the use of these amines, without reduction in hydrosilation rates.