Wholly aromatic polyamide, process for preparing same and structure thereof.

摘要

Aromatic copolyamides, soluble in organic polyamide solvents, comprise at least 95 mol % of the recurrent structural units of the formulae OCArCO A <IMAGE> B <IMAGE> C <IMAGE> D and up to 5 mol % of structural units containing m-bonds. Here -Ar-is a divalent, unsubstituted or substituted aromatic radical, the valency bonds of which are in the para-position or in a comparable coaxial or parallel position, and -R-and -R' are different from one another and are lower alkyl radicals or lower alkoxy radicals.