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:
Feb. 12, 2008
Filed:
Jun. 21, 2004
Hans-josef Laas, Bergisch Gladbach, DE;
Christoph Gürtler, Köln, DE;
Reinhard Halpaap, Odenthal, DE;
Michael Grahl, Leverkusen, DE;
Peter Thometzek, Stuttgart, DE;
James Rawlins, Leverkusen, DE;
Hans-Josef Laas, Bergisch Gladbach, DE;
Christoph Gürtler, Köln, DE;
Reinhard Halpaap, Odenthal, DE;
Michael Grahl, Leverkusen, DE;
Peter Thometzek, Stuttgart, DE;
James Rawlins, Leverkusen, DE;
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
A process for preparing polyisocyanate-modified polycarboxylic acids by conversion of anhydride-group-free polycarboxylic acids with isocyanate-functional compounds. The process includes reacting A) an anhydride-group-free polycarboxylic-acid component with B) an isocyanate-functional component having an (average) isocyanate functionality of at least 1.8, at an equivalent ratio of carboxylic acid groups to isocyanate groups of from 1.2:1 to 120:1. The polyisocyanate-modified polycarboxylic acids are solid below 40° C. and liquid above 130° C., and have an average carboxylic acid functionality of at least 1.8, a content of free carboxylic acid groups of from 4.0 wt. % to 80.0 wt. % and a content of amide groups of from 0.4 wt. % to 32.5 wt. %.