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POLYVINYL CHLORIDE/POLYURETHANE FOAM COMPOSITE ELEMENTS, THE PRODUCTION THEREOF, AND LIQUID, URETHANE-CONTAINING POLYISOCYANATE MIXTURES WHICH CAN BE USED TO PREPARE THE POLYURETHANE FOAM
POLYVINYL CHLORIDE/POLYURETHANE FOAM COMPOSITE ELEMENTS, THE PRODUCTION THEREOF, AND LIQUID, URETHANE-CONTAINING POLYISOCYANATE MIXTURES WHICH CAN BE USED TO PREPARE THE POLYURETHANE FOAM
The invention relates to a composite element comprising A) at least one top layer of polyvinyl chloride or a polyvinyl chloride-containing polymer mixture, and B) a preferably semi-rigid or rigid polyurethane foam, where the top layer (A) or the polyurethane foam (B) or both constituents (A) and (B) contain units of an alpha , beta -olefinically unsaturated polyester having a molecular weight factor of from 150 to 3000 per double bond, to a process for the production of composite elements of this type, and to liquid, urethane group-containing polyisocyanate mixtures based on diphenylmethane diisocyanates and higher homologues thereof and alpha , beta -olefinically unsaturated polyesters for the preparation of polyurethane foams (B).
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