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:
Jun. 27, 2006
Filed:
Nov. 21, 2003
Applicants:
Frank Richter, Leverkusen, DE;
Reinhard Halpaap, Odenthal, DE;
Hans-josef Laas, Bergisch Gladbach, DE;
Andreas Hecking, Langenfeld, DE;
Inventors:
Frank Richter, Leverkusen, DE;
Reinhard Halpaap, Odenthal, DE;
Hans-Josef Laas, Bergisch Gladbach, DE;
Andreas Hecking, Langenfeld, DE;
Assignee:
Bayer MaterialScience AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D 229/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to the use of cycloalkylphosphines as catalysts for isocyanate dimerization and to a process for preparing polyisocyanates containing uretdione groups.