A process for the preparation of aromatic thermotropic copolyesteramides,and copolyesteramides corresponding thereto.

摘要

A process for the preparation of novel aromatic thermotropic copolyesteramides. The novel copolyesteramides made up of monomeric units of formula I to IV in molar proportions of 40-60 % of I, 10-20 % of II, 1-12 % of III and 15-30 % of IV are obtained by polymerizing the corresponding monomers in molten or dissolved state, in an inert atmosphere, during a period of time between 2 and 18 hours and a temperature between 220 and 350<o> C. These products are useful in the preparation of filaments with high tensile strenght and high tensile modulus, as well as for the preparation of products molded by extrusion or injection and also for the preparation of films. <CHEM> s