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:
Jul. 24, 2018
Filed:
Dec. 05, 2014
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Assignee:
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/00 (2006.01); C08G 59/00 (2006.01); C08G 64/02 (2006.01); C08G 2/00 (2006.01); C08L 59/00 (2006.01); C08G 18/08 (2006.01); C08G 18/44 (2006.01); C08G 18/72 (2006.01);
U.S. Cl.
CPC ...
C08G 64/0208 (2013.01); C08G 2/00 (2013.01); C08G 18/08 (2013.01); C08G 18/44 (2013.01); C08G 18/72 (2013.01); C08L 59/00 (2013.01);
Abstract
The present invention relates to a method for producing formaldehyde-alkylene carbonate copolymers comprising the step of reacting trimeric, oligomeric and/or polymeric formaldehyde with an alkylene carbonate in the presence of a catalyst. Said invention further relates to copolymers obtainable by this method and the reaction products thereof with polyisocyanates.