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:
Aug. 12, 2025
Filed:
Mar. 26, 2021
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Elisabeth Vogelsang, Cologne, DE;
Joerg Hofmann, Krefeld, DE;
Klaus Lorenz, Dormagen, DE;
Philipp Sander, Grevenbroich, DE;
Stefan Werda, Jüchen, DE;
Mike Schuetze, Leverkusen, DE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/44 (2006.01); C08G 18/10 (2006.01); C08G 18/48 (2006.01); C08G 64/18 (2006.01); C08G 65/26 (2006.01); C08G 65/332 (2006.01);
U.S. Cl.
CPC ...
C08G 18/44 (2013.01); C08G 18/10 (2013.01); C08G 18/4845 (2013.01); C08G 64/183 (2013.01); C08G 65/2606 (2013.01); C08G 65/2663 (2013.01); C08G 65/2672 (2013.01); C08G 65/3328 (2013.01); C08G 2261/126 (2013.01);
Abstract
The invention relates to a process for preparing a polyoxyalkylene carbonate polyol by reacting a polyoxyalkylene polyol with a cyclic carbonate in the presence of an amine catalyst. The invention further relates to polyoxyalkylene carbonate polyols obtainable using the method according to the invention and to a process for preparing polyurethanes by reacting the polyoxyalkylene carbonate polyols according to the invention with polyisocyanates.