Molded foamed polyurethane part having a lightweight skin and a process for its manufacture

US4389454A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinrich Horacek · Puchenau, AT
• Matthias Marx · Fürstenfeldbruck, DE
• Dietmar Hobein · Olching, DE

Key dates

• Filing date: Apr 8, 1981
• Grant date: Jun 21, 1983
• Expiry date: Apr 8, 2001

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/249988
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to the preparation of molded polyurethane parts having a lightfast polyurethane skin. The skin is formed by applying a reaction mixture comprising an organic polyisocyanate, a polyol, a chain extender, an aliphatic primary or secondary aliphatic diamine, and a catalyst, by a one-shot process in the absence of solvents, to the inside wall of the molding tool. The molded parts produced in accordance with this invention are used, for instance, in the automobile industry for the inside equipment of vehicles. Specifically, they may be used as cover plates for steering wheels and for lining doors. They may also be used for external equipment such as bumpers, headlight housings, and may be used in the electrical industry as housing elements.