To improve the properties of the thermoplastic polyesters and copolyesters by the addition of the polyamides resulting from dicarboxylic acids is a continuation of the upper

摘要

P the invention relates to the polymer industry. / p & & p & it relates to a process for improving the properties of the polyesters and copolyesters by the addition to these latter of 0,01 to 20% by weight of a polyamide of high molecular weight of the radicals containing a dibasic acid aliphatic or cycloaliphatic of high molecular weight comprising 18 to 52 carbon atoms and 0 to 30% by weight on the basis of the set of dibasic acids, of a saturated aliphatic dibasic acid at a short chain of 2 to 13 carbon atoms, in addition to 90 to 110 equivalents per cent of a saturated aliphatic diamine of 2 to 10 carbon atoms or a mixture of these diamines. / p & & p & this process is preferred to facilitate the work of the polyesters and copolyesters by extrusion. / p