Composite plastic moldings and a process for their production

US4797320A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Richard Kopp · Cologne, DE
• Gerhard Grogler · Leverkusen, DE
• Heinrich Hess · Cologne, DE
• Hermann Schafer · Hamburg, DE
• Werner Rasshofer · Kürten, DE

Key dates

• Filing date: Jan 4, 1988
• Grant date: Jan 10, 1989
• Expiry date: Jan 4, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31554
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A composite plastic molding made up of a plastic foam and having a polyurethane skin is made by heating a reactive one-component system to form a polyurethane skin and then joining the polyurethane skin to the plastic foam. The one-component system is composed of a finely divided polyisocyanate in which from 0.1 to 25 equivalent percent of the isocyanate groups have been deactivated, a polyamine and/or polyol having a molecular weight of from 400 to 8000 and optionally a chain extending agent, a catalyst and known auxiliaries and additives.