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. 09, 2014
Filed:
May. 16, 2012
Applicants:
John M. Huggins, Leverkusen, DE;
Hubertus Eversheim, Wermelskirchen, DE;
Inventors:
John M. Huggins, Leverkusen, DE;
Hubertus Eversheim, Wermelskirchen, DE;
Assignee:
Momentive Performance Materials Inc., Waterford, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C08G 77/445 (2006.01); C08G 77/448 (2006.01); C08G 77/14 (2006.01);
U.S. Cl.
CPC ...
C08G 77/448 (2013.01); C08G 77/14 (2013.01);
Abstract
Disclosed herein is a process for the production of a polysiloxane-polyorgano block copolymer. The process includes reacting a reaction mixture containing (a) an ester-functional polydiorganosiloxane and (b) a bisphenolic compound or a bisphenolic compound oligomer. This process has the advantage of yielding block copolymers with controlled block structures and avoiding the impurities that may be carried over from the conventional hydroxyaryloxy-terminated-polydiorganosiloxanes.