Abstract: The present invention relates to a process for the production of a composite element. The process includes (i) provision of an outer layer with an uncoated surface and a coated surface coated at least partially with a composition (B) including at least one inorganic material, (ii) treatment of the uncoated surface of the outer layer and (iii) application, to the treated surface of the outer layer, of a composition (Z2) suitable for the production of a polyurethane foam and/or polyisocyanurate foam. The present invention further relates to a composite element obtainable or obtained by a process of the invention, and also to the use of a composite element obtainable or obtained by a process of the invention or of a composite element of the invention as insulation material or in the construction of façades.

Abstract: The invention relates to a process for producing composite bodies comprising at least one covering layer a) and a rigid foam based on isocyanate b), in which the covering layer a) is moved continuously and the starting material for the rigid foam based on isocyanate b) is applied to the covering layer, wherein the application of the liquid starting material for the rigid foam based on isocyanate b) is effected by means of a fixed tube which is provided with orifices and is arranged parallel to the covering layer a) and at right angles to the direction of movement of the covering layer a).