Preparation of isocyanurate- and/or uretidone-containing polysiocyanates having a reduced color index and improved shelf life, and products prepared by this method

US5436336A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernd Bruchmann · Ludwigshafen, DE
• Stefan Wolff · Sunnyvale, US
• Konrad Stiefenhoefer · Ebertsheim, DE

Key dates

• Filing date: Jun 13, 1994
• Grant date: Jul 25, 1995
• Expiry date: Jun 13, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D251/34
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Isocyanurate- and/or uretidone-containing polyisocyanates having a reduced color index and improved shelf life are prepared by conventional catalytic oligomerization of aliphatic and/or cycloaliphatic diisocyanates and treatment of the oligomerization products with peroxycarboxylic acids.