Brominated aromatic polyphosphate copolymers

Abstract

An improved flame retardant molding composition of polypropylene terephthalate or polybutylene terephthalate is provided. The composition includes in intimate admixture an oxide of antimony and a specific brominated aromatic polyphosphate copolymer which has been found to be highly compatible with the other components. In a preferred embodiment the molding composition additionally includes a reinforcing agent (e.g. a glass fiber reinforcing agent). Unlike the flame retardant molding compositions of the prior art, the components of the same tend to be non-exuding during utilization of a resulting three-dimensional shaped article at elevated temperatures (e.g. after 66 hours at 175.degree.C.) and thereby render the same suitable for attractive utilization in an even wider range of applications.

Dependencies are inferred from the claim text.