THERMOPLASTICS POLYESTER RESIN COMPOSITION

摘要

A thermoplastic polyester resin composition having excellent heat stability and retaining good properties in long-term use at elevated temperatures comprises 100 parts by weight of a thermoplastic polyester and, in mixture therewith, 0.001 SIMILAR 5 parts by weight of one or more different phosphoric compounds represented by the general formula (I): (in which Ar and Ar' represent aryl or substituted aryl groups having 6 SIMILAR 35 carbon atoms, which may be identical with or different from each other.) The compounds of formula (I) have been found to act synergistically with 0.001 SIMILAR 5 parts by weight of hindered phenolic compounds. The polyester resin may be blended with other thermoplastic resins. The composition may be filled with glass fillers and organo-halogen compounds and organophosphorous compounds may be present as flame retardants optionally with metal oxide or hydroxide flame retarding auxiliaries.