Patent ID: 8138233

Claim:
A composition comprising a modified polybutylene terephthalate random copolymer that (1) is derived from a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) comprises at least one residue derived from the polyethylene terephthalate component, wherein the modified polybutylene terephthalate random copolymer (i) has an intrinsic viscosity that is more than 0.55 dL/g and a melting temperature that is more than 200 ° C., and (ii) the at least one residue derived from the polyethylene terephthalate component includes from 0.1 to 10 moles % ethylene glycol groups and from 0.1 to 10 mole % diethylene glycol groups, based on the total moles of diol groups in the copolymer, as part of a mixture of ethylene glycol groups, diethylene glycol groups and isophthalic acid groups at an amount ranging from more than 0 to 23 equivalents, relative to the total of 100 equivalents of diol and 100 equivalents of diacid groups in the modified polybutylene terephthalate random copolymer, and from more than 0 ppm to less than 1000 ppm of an inorganic residue selected from the group consisting of antimony-containing compounds, germanium-containing compounds, titanium-containing compounds, cobalt-containing compounds, tin containing compounds, aluminum, aluminum salts, alkali salts, alkaline earth metal salts, phosphorous-containing compounds, phosphorous-containing anions, sulfur-containing compounds, sulfur-containing anions, and combinations thereof.