Process for producing composite elements

Abstract

The present invention relates to a process for producing composite elements comprising at least one rigid foam layer a) and at least one outer layer b), at least comprising: provision of a flowable starting material a*) and application of the flowable starting material a*) to the outer layer b) by means of a fixed application apparatus c) while the outer layer b) is moved continuously. The starting material a*) here comprises at least one polyisocyanate, at least one polyol, at least one blowing agent, a catalyst composition comprising at least one compound D1) selected from the group consisting of metal carboxylates and N,N′,N″-tris(dimethylaminopropyl)hexahydrotriazine, and at least one compound D2) which catalyzes polyurethane formation and which differs from the compound D1) and comprises at least one amino group, and optionally auxiliaries and additives. The polyol component (component B)) in this invention is one selected from polyetherols, and the starting material a*) in this invention is free from polyesterols. The present invention further relates to composite elements obtainable by a process of this type.

Dependencies are inferred from the claim text.