Reinforced cellular or noncellular polyurethane molded parts

US4596835A · kind A · utility

Assignee

• BASF SE

Inventors

• Frank Werner · Jackson, US
• Rainer Blum · Ludwigshafen, DE
• Peter Horn · Heidelberg, DE
• Martin Welz · Bad Dürkheim, DE
• Rolf Osterloh · Lechenich, DE

Key dates

• Filing date: Nov 23, 1984
• Grant date: Jun 24, 1986
• Expiry date: Nov 23, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G18/80
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Reinforced cellular or noncellular molded polyurethane parts are prepared by heating a mixture of reinforcing materials and a heat-curable composition of polyisocyanates and polyols in an open or closed mold, said composition being storage-stable at room temperature and containing, optionally, auxiliaries and additives. In said composition, the polyisocyanate is dispersed in the form of discreet particles having particle diameters from 0.1 to 150 .mu.m in the polyol and the polyisocyanate particles are deactivated on their surfaces such that from 0.01 to 20 equivalent percent of the total available isocyanate groups are deactivated and such that the ratio of free isocyanate groups to hydroxyl groups is from 0.7:1 to 2.5:1. The polyurethane molded parts are suitable for use as self-supporting trim parts, reinforcement parts, or molded parts for various applications.