Patent ID: 6790537
Filing Date: 2004-09-14
Classification: B32B,C08G,Y10T

Abstract:
Composite element having the following layer structure:(i) from 2 to 20 mm of metal, (ii) from 10 to 300 mm of polyisocyanate polyaddition products comprising the reaction product of (a) isocyanates with (b) compounds which are reactive toward isocyanates in the presence of from 0.1 to 50% by volume, based on the volume of the polyisocyanate polyaddition products, of at least one added gas (c) and also, optionally, (d) catalysts and/or (e) auxiliaries and/or additives, (iii) from 2 to 20 mm of metal, and has a modulus of elasticity of >275 MPa in the temperature range of from âˆ’45 to +50Â° C., and adhesion to (i) and (iii) of >4 MPa, an elongation of >30% in the temperature range of from âˆ’45 to +50Â° C., a tensile strength of >20 MPa and a compressive strength of >20 MPa.