Dynamit Nobel Aktiengesellschaft

Rudeger Minke

Werner Schmidt

Gunther Bernhardt

Werner Trautvetter

An improvement in a process for preparing an antimony oxide stabilized polymethylene terephthalate polymeric composition wherein polymethylene terepthalate is produced by polycondensing a polymethylene terephthalate precondensate, the improvement residing in compounding said precondensate with said antimony oxide and thereafter subjecting the resultant composition to solid phase polycondensation. In particular is described a process for the stabilization of high molecular weight (high viscosity) polymethylene terephthalate wherein together with the antimony oxide there is added a stabilizer or other additive to the precondensate and the resultant composition is subjected to solid phase polycondensation. Also described are the resultant products of such processes.

Preparation of high-viscosity mixtures containing thermoplastic

A method of deacetylation of ethylene-vinyl acetate copolymers to produce the corresponding olefinicaly unsaturated, linear polymers. The ethylene-vinyl acetate copolymers are deacetylated under a vacuum of less than about 50 Torr, by splitting acetic acid from the copolymers, and while continuously stirring the copolymers.

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Troisdorf, Germany

Rudeger Minke