| abstract |
Disclosed is a molded or extruded thermoplastic article having high heat stability, including a thermoplastic polyamide composition including (a) a polyamide resin; (b) 0.25 to 20 weight percent of one or more polyhydroxy polymer(s) having a number average molecular weight of at least 2000; (c) 0.1 to 3 weight percent of one or more co-stabilizer(s) selected from the group consisting of secondary aryl amines, hindered amine light stabilizers, hindered phenols, and mixtures thereof; (d) 0 to less than 10 weight percent of one or more reinforcement agents; and (f) 0 to 20 weight percent of a polymeric toughener; n wherein molded 4 mm test bars prepared from said polyamide composition, and exposed in an oven at an test temperature of at least 150° C. for a test period of at least 500 hours, in an atmosphere of air, and tested according to ISO 527-2/1A, have, on average, a retention of elongation at break of at least 50 percent, as compared to that of an unexposed control of identical composition and shape |