Moldable/extrudable thermotropic aromatic copolyesteramides

Abstract

High molecular weight thermotropic aromatic copolyesteramides which can be molded/extruded into a wide variety of useful shaped articles having improved thermomechanical properties are comprised of recurring structural units of the formulae (I), optionally (II), (III) and (IV), wherein: ##STR1## in which R.sub.1 is a methyl or ethyl radical or a chlorine or bromine atom, with the proviso that the units (I) may be identical or different; ##STR2## the molar ratio of the units (I) relative to the sum of the units (II)+(III) ranges from 0.95 to 1.05; the amount of the units (II) in the mixture of (II)+(III) ranges from 0 to 80 mol % and that of the units (III), on the same basis, ranges from 100 to 20 mol %; the amount of the units (IV), expressed relative to the amount of the units (I), ranges from 5 to 100 mol %; and said copolyesteramides have a flow temperature ranging from 200.degree. to 350.degree. C.

Dependencies are inferred from the claim text.