Process for the production of polyureas

US4328330A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Wolfgang Wellner · Bensberg, DE
• Artur Botta · Krefeld, DE
• Hermann Gruber · Leverkusen, DE

Key dates

• Filing date: May 4, 1981
• Grant date: May 4, 1982
• Expiry date: May 4, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/3225
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the production of polyureas by reacting organic polyisocyanates containing blocked isocyanate groups with organic compounds containing at least two primary and/or secondary amino groups in the presence of catalysts which accelerate the condensation reaction of the above-mentioned starting materials, characterized in that compounds containing at least one guanidine group corresponding to the following formula: ##STR1## are used as catalysts.