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:
Nov. 28, 2017
Filed:
Oct. 06, 2014
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Alexander Meyer, Düsseldorf, DE;
Klaus Horn, Dormagen, DE;
Thomas Pfingst, Tönisvorst, DE;
Sebastian Wetzel, Schwelm, DE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 64/18 (2006.01); C08G 77/448 (2006.01);
U.S. Cl.
CPC ...
C08G 64/186 (2013.01); C08G 77/448 (2013.01);
Abstract
The present invention relates to a process for preparing polysiloxane-polycarbonate block cocondensates proceeding from specific polycarbonates and hydroxyaryl-terminated polysiloxanes in presence of a salt of a weak acid.