FLAME-RETARDANT POLYESTER COMPOSITION AND ARTICLE

摘要

A polyester composition includes specific amounts of a poly(alkylene terephthalate), an impact modifier, glass fibers, and a flame retardant. The impact modifier includes a polyolefin elastomer, optionally in combination with a thermoplastic polyester elastomer. The flame retardant includes a metal dialkylphosphinate, a melamine based flame retardant, and a flame retardant synergist that can be an organophosphine oxide, an oligomeric or polymeric bis(phenoxy)phosphazene, an organophosphate ester, or a combination thereof. The composition is useful for fabricating parts for electrical and electronic devices.

主权项

1. A composition, comprising:
35 to 76 weight percent of a poly(alkylene terephthalate); 2 to 6 weight percent of an impact modifier comprising a polyolefin elastomer comprising an ethylene/1-octene copolymer, and, optionally, a thermoplastic polyester elastomer, provided that the amount of polyolefin elastomer does not exceed 5 weight percent; 10 to 50 weight percent glass fibers; and 14 to 25 weight percent of a flame retardant comprising
5 to 15 weight percent of a metal dialkylphosphinate,2 to 8 weight percent of a melamine-based flame retardant, and1 to 6 weight percent of a flame retardant synergist comprising an organophosphine oxide, an oligomeric or polymeric bis(phenoxy)phosphazene,an organophosphate ester, or a combination thereof; wherein all weight percent values are based on the total weight of the composition.