Preparation of biuret-containing polyisocyanates

US5641851A · kind A · utility

Assignee

• BASF SE

Inventors

• Stefan Wolff · Sunnyvale, US
• Wolfgang Heider · Neustadt, DE
• Werner Langer · Ludwigshafen, DE
• Hans Renz · Meckenheim, DE

Key dates

• Filing date: Oct 31, 1995
• Grant date: Jun 24, 1997
• Expiry date: Oct 31, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C275/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention is to a process for the preparation of biuret-containing polyisocyanates by catalytic reaction of aliphatic and/or cycloaliphatic diisocyanates with a biuretizing agent, where the biuretizing agent employed is water in finely disperse form and the reaction is carried out in the presence of OH-acidic compounds.