Stable adhesive composite material made of polyurethane and of another thermoplastic material, a process for its production and a method for its use in motor vehicles

US6296908A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karsten Reihs · Cologne, DE
• Werner Rasshofer · Kürten, DE
• Holger Warth · Sha Tin, CN
• Dirk Wegener · Bielefeld, DE
• Manfred Schmidt · Krefeld, DE
• Peter Heitkamper · Dormagen, DE

Key dates

• Filing date: May 16, 2000
• Grant date: Oct 2, 2001
• Expiry date: May 16, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31739
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

The present invention relates to composite materials made of at least one composite layer of a polyurethane and of a second composite layer which is directly bonded to the first layer and which consists of a thermoplastic material that is different from the polyurethane of layer A). The polyurethane material of layer A) is characterized by a residual content of free reaction components containing ether groups of no more than 400 ppm, and preferably of no more than 100 ppm. The invention also relates to a process for the production of these composite materials and to a method of their use as materials in motor vehicles.