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. 01, 2026
Filed:
Dec. 09, 2021
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Christoph Malbertz, Herzogenrath, DE;
Stefan Hirschfeld, Alpen, DE;
Dieter Mager, Leverkusen, DE;
Oswald Wilmes, Cologne, DE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/78 (2006.01); C08G 18/02 (2006.01); C08G 18/18 (2006.01); C08G 18/32 (2006.01); C09D 175/04 (2006.01);
U.S. Cl.
CPC ...
C08G 18/022 (2013.01); C08G 18/1875 (2013.01); C08G 18/3206 (2013.01); C08G 18/7837 (2013.01); C08G 18/7843 (2013.01); C09D 175/04 (2013.01); C08G 2150/00 (2013.01);
Abstract
The invention relates to a method for producing isocyanate-terminated, urethane group-containing prepolymers, comprising reacting a reaction mixture that contains a stoichiometric excess of at least one aliphatic and/or cycloaliphatic diisocyanate and a polyol composition having an OH number >400, characterized in that the reaction mixture is mixed with a specific power input of 0.5 kW/m3 to 40 kW/m3, relative to the total volume of the reaction mixture.