Heat-curing polyether-polyester-polyurethane ureas

US5091497A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gerhard Grogler · Leverkusen, DE
• Richard Kopp · Cologne, DE
• Heinrich Hess · Cologne, DE
• Eduard Hansel · Wuppertal, DE
• Thomas Scholl · New Haven, US

Key dates

• Filing date: Nov 30, 1990
• Grant date: Feb 25, 1992
• Expiry date: Nov 30, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0033
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to heat-curable reaction systems prepared by mixing (a) solid polyisocyanates (optionally deactivated) having melting points above 80.degree. C., (b) OH- and/or NH.sub.2 -terminated polyoxyalkylene polyethers that have molecular weights of 400 to 10,000 and are liquid at room temperature, (c) solid OH- and/or NH.sub.2 -terminated polyesters that have molecular weights of 400 to 20,000 and are solid at room temperature, and which are thoroughly distributed throughout the mixture but are not homogeneously miscible with the polyether, (d) optional low molecular weight chain-extending agents that contain OH and/or NH.sub.2 groups and have a molecular weight of 62 to 399, and (e) optional catalysts and other auxiliaries. The invention further relates to a method for preparing elastomers, coating compounds, sealing compounds, or adhesives by heat-curing the heat-curable systems.