Isocyanurate group-containing polyisocyanates

US4851531A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Reinhard Halpaap · Odenthal, DE
• Gerhard Klein · Monheim, DE
• Roland Richter · Cologne, DE
• Hanns P. Muller · Leverkusen, DE
• Josef Pedain · Cologne, DE
• Hans-Joachim Kreuder · Krefeld, DE

Key dates

• Filing date: Jul 16, 1987
• Grant date: Jul 25, 1989
• Expiry date: Jul 16, 2007

Classification

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

Abstract

The present invention is directed to isocyanato isocyanurates prepared from diisocyanates which contain a sterically unhindered isocyanate group bound to a primary aliphatic carbon atom and a sterically hindered isocyanate group which is bound to a tertiary carbon atom forming part of a cycloaliphatic ring system, said diisocyanate having an NCO content of about 20 to 50% by weight. The present invention is further directed to a process for preparing these isocyanato isocyanurates by catalytic trimerization and the use of the isocyanato isocyanurates in a process for the production of polyisocyanate polyaddition products, preferably two-component polyurethane stoving lacquers.