Process for the production of finely divided polyisocyanates containing urea groups

US4757105A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Richard Kopp · Cologne, DE
• Gerhard Grogler · Leverkusen, DE
• Heinrich Hess · Cologne, DE
• Klaus Konig · Leverkusen, DE

Key dates

• Filing date: Nov 3, 1987
• Grant date: Jul 12, 1988
• Expiry date: Nov 3, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/7825
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention is directed to a process for the preparation of finely divided solid polyisocyanates containing urea groups by reacting organic polyisocyanates which are free from urea groups with water in an aqueous emulsion, characterized in that the reaction is carried out in the presence of an emulsion- and dispersion-stabilizing compound.