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:
May. 21, 2013
Filed:
Aug. 23, 2010
Martin Brahm, Odenthal, DE;
Dieter Mager, Leverkusen, DE;
André Fellhoelter, Bergisch Gladbach, DE;
Reinhard Halpaap, Odenthal, DE;
Martin Brahm, Odenthal, DE;
Dieter Mager, Leverkusen, DE;
André Fellhoelter, Bergisch Gladbach, DE;
Reinhard Halpaap, Odenthal, DE;
Bayer MaterialScience AG, Leverkusen, DE;
Abstract
The present invention relates to an improved process for the preparation of polyisocyanates with a biuret structure by continuous reaction of excess amounts of organic diisocyanates having exclusively aliphatically and/or cycloaliphatically bonded isocyanate groups with organic diamines having exclusively aliphatically and/or cycloaliphatically bonded primary amino groups at elevated temperatures by 2-stage addition of the isocyanate component.