Preparation of polyisocyanates containing isocyanurate groups and use thereof

US5489663A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Brandt · Ludwigshafen, DE
• Bernd Bruchmann · Ludwigshafen, DE
• Gerhard Laqua · Mutterstadt, DE
• Franz Merger · Bischofswerda, DE
• Andreas Otterbach · Tervuren, BE
• Konrad Stiefenhöfer · Ebertsheim, DE
• Tom Witzel · Ludwigshafen, DE
• Stefan Wolff · Sunnyvale, US
• Rainer Becker · Bad Dürkheim, DE

Key dates

• Filing date: Dec 15, 1994
• Grant date: Feb 6, 1996
• Expiry date: Dec 15, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/792
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

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.