US 6,296,908 B1 · 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

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.

Claims2

Dependent claims

A process for the production of a composite material comprising at least two layers of different plastics materials which are directly bonded to one another, comprising:

(1) applying (A) a polyurethane-forming reaction system comprising (a) an organic polyisocyanate and (b) an isocyanate-reactive component, onto (B) a prefabricated thermoplastic polymer, and
(2) allowing the polyurethane-forming reaction system to fully react, thereby forming a composite material comprising at least two different plastics layers, wherein the polyurethane-forming reaction system has a residual content of reaction components containing ether groups of at most 400 ppm.

Dependencies are inferred from the claim text.

Facts

Application

09/571,226Filed 16 May 2000

Priority

DE 199 24 09226 May 1999

Granted

2 Oct 2001

Term ends

Not estimatedThe source records don’t support an estimate.

Classification25 codes

B32B 27/40
Layered products comprising a layer of synthetic resin: comprising polyurethanes
B32B 5/18
Layered products characterised by the non- homogeneity or physical structure , i.e. comprising a fibrous, filamentary, particulate or foam…
B32B 27/32
Layered products comprising a layer of synthetic resin: comprising polyolefins
B32B 27/34
Layered products comprising a layer of synthetic resin: comprising polyamides

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

Life of this patent

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

Life of this patent

Abstract

Claims2