Thermoplastic polyamide moulding compositions

• Main Authors: REXIN, ORNULF ER.NAT, SCHMID, EDUARD DR.SC.NAT
• Format: Patent
• Language: English; French; German
• Published: 06.07.2005
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

Thermoplastic polyamide molding material comprises at least 20 wt.% nylon 12 (optionally in copolymer form) and 0.05-3 wt.% of an N-alkylated cyclic carboxamide (I) or a urea derivative. Thermoplastic polyamide molding material comprises at least 20 wt.% nylon 12 (optionally in copolymer form) and 0.05-3 wt.% of an aprotic compound which is an N-alkylated cyclic carboxamide of formula (I) or a urea derivative. x : 1-3; R1 : linear, branched or cyclic octyl that optionally contains heteroatoms or heterogroups or forms a linkage between two N atoms. Independent claims are also included for: (1) producing the molding material by applying the aprotic compound to (co)polyamide granules and mixing until the compound has diffused into the granules; (2) producing the molding material by incorporating the aprotic compound in a polyamide matrix in an amount of 3-30 wt.% and using the product as a masterbatch. [Image]. Die vorliegende Erfindung betrifft thermoplastische Polyamid-Formmassen, die mindestens ein Copolyamid mit mindestens 20 Gew.-% Polyamid 12-Monomer und mindestens eine aprotische Verbindung aus der Gruppe der N-alkylierten, cyclischen Carbonsäureamide mit 5 - 7 Ringgliedern und/oder Harnstoffderivate enthalten, deren Alkylreste am Stickstoff linear sind oder eine Verknüpfung der beiden N-Atome bilden, sowie ein Verfahren zur Herstellung der Formmassen. Die thermoplastischen Polyamid-Formmassen zeichnen sich dadurch aus, dass bei einer thermoplastischen Umformung keine Feststoffablagerungen entsteht.