20140275385 | HEAT STABILIZED MOULDING COMPOSITION - A thermostabilized thermoplastic moulding composition includes a) a thermoplastic polyamide composition which consists of a blend of at least two polyamides. The at least two polyamides include a1) at least 50 mass %, relative to the total mass of the thermoplastic polyamide composition, of a first polyamide (PA-1) selected from the group consisting of polyamide-4,6, polyamide-6,6 and semi-aromatic polyamides and mixtures thereof; and a2) an amount of 1-50 mass %, relative to the total mass of the thermoplastic polyamide composition, of a second polyamide (PA-2) selected from the group consisting of polyamide-6 and copolymers thereof. The composition also contains b) 0.001-3 mass %, relative to the total mass of the thermoplastic polyamide composition, of a copper salt; and c) 0.01-10 mass %, relative to the total mass of the thermoplastic polyamide composition, of iron oxide. The moulding composition exhibits reduced deterioration when exposed to an elevated temperature of 230° C. for a prolonged time period of 1000 hours as compared to an identical moulding composition including a Cul/KI stabilization system but not including the iron oxide. | 09-18-2014 |
20140288224 | HEAT STABILIZED MOULDING COMPOSITION - Non-fibrous-reinforced thermoplastic moulding compositions comprising a metal powder as a heat stabilizer are provided. The metal powder has a weight average particle size (dm) of at most 1 mm and the metal in the metal powder is selected from the group consisting of elementary metals from Group VB, VIIB, VIIB and VIIIB of the Periodic Table, and mixtures thereof. A thermoplastic polyamide is also provided with an Mw of at most 50,000 g/mol, or a blend of at least two thermoplastic polymers with Tmelt or Tg differing by at least 20° C., or a second thermostabilizer. The invention also relates to the use of these compositions in high temperature applications. | 09-25-2014 |