Process for the preparation of polyisocyanates containing isocyanurate groups and the use thereof

US4324879A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Bock · Leverkusen, DE
• Josef Pedain · Cologne, DE
• Walter Uerdingen · Leverkusen, DE

Key dates

• Filing date: May 19, 1980
• Grant date: Apr 13, 1982
• Expiry date: May 19, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2150/20
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention is concerned with an improved process for the production of partially trimerized hexamethylene diisocyanate which yields isocyanurate isocyanates which have low viscosity and low monomer contents by the use of a quaternary ammonium hydroxide catalyst which is hydroxyalkyl substituted at its N atom.