| abstract |
Novel nucleating agents have been discovered which are effective in polyesters, especially poly(ethylene terephthalate). The novel nucleating agents are copolymers derived from a poly(alkylene terephthalate) and a sulfonate salt. n Also provided by this invention are a process for nucleating polyesters, particularly poly(alkylene terephthalates), especially poly(ethylene terephthalate) and the compositions so produced. |