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:
Apr. 10, 2018
Filed:
Jul. 21, 2014
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Frank Richter, Leverkusen, DE;
Reinhard Halpasp, Odenthal, DE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/02 (2006.01); C07D 273/04 (2006.01); C08G 18/79 (2006.01); C08G 18/78 (2006.01); C08G 18/16 (2006.01);
U.S. Cl.
CPC ...
C08G 18/027 (2013.01); C07D 273/04 (2013.01); C08G 18/02 (2013.01); C08G 18/022 (2013.01); C08G 18/166 (2013.01); C08G 18/7887 (2013.01); C08G 18/79 (2013.01); C08G 18/792 (2013.01);
Abstract
The present invention relates to a method for producing polyisocyanates comprising iminooxadiazinedione groups, wherein at least one monomeric di- and/or tri-isocyanate is oligomerized in the presence of at least one catalyst and succinonitrile. The invention relates further to a reaction system for producing polyisocyanates comprising iminooxadiazinedione groups, and to the use of succinonitrile in the production of polyisocyanates comprising iminooxadiazinedione groups by catalyzed modification of monomeric di- and/or tri-isocyanates.