High molecular weight polyamines and their use in preparation of polyurethane resins

US4224417A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Hajek · Leverkusen, DE
• Kuno Wagner · Leverkusen, DE
• Friedrich W. Moller · Friedrichsdorf, DE
• Peter Vehlewald · Leichlingen, DE

Key dates

• Filing date: Jan 2, 1979
• Grant date: Sep 23, 1980
• Expiry date: Jan 2, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/10
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to new polyamines, preferably containing polyether segments, a process for their preparation and their use as starting components for the production of polyurethane resins. The process involves producing ketimines, aldimines or enamines containing hydroxyl groups by reacting a hydroxyl amine with an aldehyde or ketone and removing the water by product. The ketimine, aldimine, or enamine is then reacted with an NCO prepolymer wherein the hydroxyl group of the material reacts with the isocyanate group without disturbing the blocked amine. This polyaddition product is then hydrolyzed to unblock the high molecular weight polyamine.