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:
Nov. 15, 2011
Filed:
Jan. 17, 2006
Applicants:
Frank Richter, Leverkusen, DE;
Hans-josef Laas, Odenthal, DE;
Reinhard Halpaap, Odenthal, DE;
Andreas Hecking, Langenfeld, DE;
Inventors:
Frank Richter, Leverkusen, DE;
Hans-Josef Laas, Odenthal, DE;
Reinhard Halpaap, Odenthal, DE;
Andreas Hecking, Langenfeld, DE;
Assignee:
Bayer MaterialScience AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G 18/79 (2006.01); C08G 18/80 (2006.01); C07C 263/16 (2006.01); C07C 265/00 (2006.01); C07D 229/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a process for preparing polyisocyanates having a high uretdione group content by phosphine-catalysed isocyanate oligomerization in the presence of organic carbonates and/or nitriles.