Wholly aromatic mesomorphic polyester amides and the preparation thereof

摘要

Wholly aromatic mesomorphic polyester amides which form a liquid-crystalline fiber-forming melt below 320 DEG C. and are composed of (a) from 3 to 30 mol % of repeat units of the formula <IMAGE> I (b) from 3 to 25 mol % of one or more of the repeat units of the formulae II, III and IV <IMAGE> II <IMAGE> III <IMAGE> IV (c) a molar amount corresponding to the total amount of components (a) and (b) of repeat units of the formulae V and/or VI <IMAGE> V <IMAGE> VI (d) repeat units of the formula VII <IMAGE> VII (e) if desired from 5 to 25 mol % of repeat units of the formula VIII <IMAGE> VIII the mole percentages of components (a), (b), (c), (d) and (e) adding up to 100 mol % in each case, and the preparation and use thereof.