Use of a polyamide moulding composition with high melt rigidity for coextruding with a polymer melting at a high temperature

• Main Authors: Böer, Michael, Dowe, Andreas, Himmelmann, Martin, Göring, Rainer, Kuhmann, Karl Dr, Baumann, Franz-Erich, Dr, Wursche, Roland, Dr
• Format: Patent
• Language: English; French; German
• Published: 05.12.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; GENERAL PROCESSES OF COMPOUNDING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; 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; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

The use of moulding materials (I) containing (a) 100 parts by weight (pts. wt.) polyamide and (b) 0.005-10 pts. wt. of a compound (II) with at least two carbonate units, for coextrusion with a moulding material (III) based on a high-melting polymer with a crystallite melting point (Tm) of at least 255 deg C and/or a glass transition point(Tg)of at least 180 deg C. Independent claims are included for (1) a method for the production of multilayer composites by making a polyamide moulding material, mixing this with 0.005-10 pts. wt. (II) per 100 pts. wt. polyamide, optionally storing and/or transporting the mixture and then coextruding it with (III) (2) multilayer composites obtained by this method .