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. 06, 1996
Filed:
Dec. 15, 1994
Peter Brandt, Ludwigshafen, DE;
Bernd Bruchmann, Ludwigshafen, DE;
Gerhard Laqua, Mannheim, DE;
Franz Merger, Frankenthal, DE;
Andreas Otterbach, Frankenthal, DE;
Konrad Stiefenhofer, Ebertsheim, DE;
Tom Witzel, Ludwigshafn, DE;
Stefan Wolff, Limburgerhof, DE;
Rainer Becker, Bad Durkheim, DE;
BASF Aktiengesellschaft, , DE;
Abstract
Polyisocyanates containing isocyanurate groups are prepared by a partial trimerization of (cyclo)aliphatic diisocyanates in the presence of at least one trimerization catalyst selected from the group consisting of tetraalkylammonium alkyl carbonates of the formula (I) ##STR1## (quaternary ammonioalkyl) carbonates having a betaine structure of the formula (II) ##STR2## and the preferred use of the polyisocyanates containing isocyanurate groups which are obtainable in this way is aspolyisocyanate component in polyurethane finishes.