Thermoplastic copolymer of poly(bisphenol A terephthalate) copolycarbonate and poly(bisphenol A isophthalate) copolycarbonate

摘要

A thermoplastic polymeric material comprises a copolymer which is a poly(bisphenol A tere-and/or-isophthalate) copolymer having a molar ratio of phthalate to carbonate units in the inclusive range from 2 to 10, preferably 3 to 8. The material, which may be prepared by techniques which are known, may be used in applications for high temperature transparent thermoplastics, e.g. transparencies for the aerospace industry.