Process for the manufacture of composite construction polyurethane as well as the use of these pieces of composite construction

Method for manufacturing a piece of composite construction comprising a) a carrier of a thermoplastic composition and b) at least one polyurethane layer is in direct contact with the support, wherein (i) in a first stage process the melt of the thermoplastic composition in a first cavity of an injection mold is injected and then cooled, the thermoplastic composition containing a) 65.0 to 90.0 parts by weight, relative to the sum of the components a and B, of at least one polymer selected from the group of aromatic polycarbonates, aromatic polyester carbonates and aromatic polyesters, B) from 10.0 to 35.0 parts by weight, relative to the sum of components a and B , a (co) polymerized vinyl optionally modified with rubber and C) from 0 to 30.0 parts by weight, relative to the sum of components a to C, of ​​at least one polymeric additive commercially available , (Ii) in a second method step the mold cavity for injection molding is expanded and this 15 means a gap space is generated, (iii) in the third method step is injected into the gap space produced in this mode between the piece thermoplastic construction and the surface of the injection mold of the enlarged cavity a mixture of starting material reactive polyurethane containing - at least one polyisocyanate component, - at least one polyfunctional compound with active H and - optionally at least one additive polyurethane and / or a processing aid, polymerizing the mixture of starting material polyurethane in contact with the surface of the thermoplastic support to give a layer of compact polyurethane or to provide a layer of polyurethane foam (iv) in the fourth process step the component composite cavity injection mold material is demoulded, individual phases the process directly to each other.