General Electric Company

Jan W Heuseveldt

Johannes Van Helmond

Hendrikus H Ketels

Roelof F Van Der Meer

Constantinus L Verbraak

The invention relates to polymer mixtures comprising a first polyalkylene phthalate and a second polyalkylene phthalate and/or a thermoplastic elastomer. Certain compounds, namely phosphates, have been found to be good transesterification inhibitors. An important advantage of the said inhibitors is that they do not condense, or hardly condense, to polyphosphates and that they do not negatively influence the impact strength of the polymer mixture.

Polymer mixture and articles formed therefrom

The invention relates to polymer mixtures comprising a first polyalkylene phthalate, for example, polybutylene terephthalate, and a second polyalkylene phthalate and/or a thermoplastic elastomer and phosphorus compounds. It has been found that, with regard to the crystallisation behaviour, the addition of certain nucleating agents (namely talcum or carbon black) show a synergistic effect with certain phosporus compounds.

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Bergen op Zoom, Netherlands

Jan W Heuseveldt