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. 18, 2006
Filed:
May. 13, 2002
Applicants:
Jürgen Köcher, Langenfeld, DE;
Frank Richter, Leverkusen, DE;
Hans-josef Laas, Bergisch Gladbach, DE;
Matthias Wintermantel, Köln, DE;
Inventors:
Jürgen Köcher, Langenfeld, DE;
Frank Richter, Leverkusen, DE;
Hans-Josef Laas, Bergisch Gladbach, DE;
Matthias Wintermantel, Köln, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C 249/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for making oligomeric isocyanates by reacting diisocyanates in the presence of a catalyst, wherein the catalyst comprises a saline compound prepared from a five-membered N-heterocycles and the N-heterocycle comprises at least one N—H function in the five-membered ring, to the products produced in this way and to polymers prepared from these products.