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:
Mar. 08, 2016
Filed:
Oct. 18, 2012
Applicant:
Bayer Intellectual Property Gmbh, Monheim, DE;
Inventors:
Thomas Ernst Mueller, Aachen, DE;
Christoph Guertler, Köln, DE;
Axel Scherer-Werke, Itzehoe, DE;
Stefan Wershofen, Mönchengladbach, DE;
Henning Vogt, Aachen, DE;
Walter Leitner, Aachen, DE;
Assignee:
Bayer Intellectual Property GmbH, Monheim, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/76 (2006.01); C07C 263/10 (2006.01);
U.S. Cl.
CPC ...
C08G 18/7657 (2013.01); C07C 263/10 (2013.01);
Abstract
The invention relates to a method for producing light-coloured polyisocyanates by phosgenation of mixtures comprising MDA and polycyclic aromatic polyamines that have o-phenylenediamine units incorporated via methylene bridges. The invention further relates to the polyisocyanate mixtures obtainable by this method.