METHOD FOR PRODUCING COMPOSITE PROFILED ELEMENTS

• Main Authors: GIANPAOLO TOMASI, LARS SCHÖN, MICHAEL KÖSTERS, LUDWING WINDELER
• Format: Patent
• Language: English; Spanish
• Published: 06.07.2015
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; FIXED CONSTRUCTIONS; FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES,FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS,BLINDS, GATES; INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES; INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS; LADDERS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention relates to a method for producing composite profiled elements comprising at least two metal shells which are connected by connecting pieces made of a thermoplastic material and comprising a core made of rigid polyurethane foam. The method has the steps of introducing the starting components of the rigid polyurethane foam into a cavity formed by the metal shells, wherein the rigid polyurethane foam is formed, and subsequently coating the outer surface of the composite profile using a powder coating or a baking enamel, said rigid polyurethane foam being obtained by reacting the following components: A) at least one polyisocyanate, B) at least one multifunctional compound which is reactive towards isocyanates, C) one or more propellants at least comprising formic acid, D) optionally one or more flame retardants, E) optionally one or more catalysts, and F) optionally other auxiliary agents or additives. The starting components of the rigid polyurethane foam do not contain inorganic fillers. La presente invención se refiere a un procedimiento para la producción de perfiles compuestos que comprenden al menos dos carcasas de metal que están unidas por tirantes que comprenden un material termoplástico y un núcleo que comprende espuma de poliuretano rígida, que comprende la introducción de los componentes de inicio de la espuma rígida de poliuretano en un espacio hueco formado por las carcasas de metal, con la espuma rígida de poliuretario en formación, y posterior aplicación de un revestimiento superficial a la superficie exterior del perfil de material compuesto por medio de un revestimiento en polvo o bicarbonato de esmalte, donde la espuma rígida de poliuretano se obtiene por reacción de los siguientes componentes: A) al menos un poliisocianato, B) al menos un compuesto polifuncional que es reactivo frente a isocianatos, C) uno o más agentes de soplado que comprenden al menos ácido fórmico,D) opcionalmente uno o más retardantes de llama, E) opcionalmente uno o más catalizadores y F) opcionalmente otras sustancias auxiliares o aditivos, donde los componentes de inicio de la espuma rígida de poliuretano no comprenden ningún material de relleno inorgánico.