| abstract |
Polycondensates containing liquid-crystalline carbamide groups, built up from a) aromatic hydroxy and / or amino carboxylic acids in which the hydroxy or amino group is not vicinal to the carboxyl group, b) 0.1 to 20 mol.% Urea, c) aromatic dihydroxy, Diamino and / or hydroxy amino compounds in which the hydroxy and amino groups are not arranged vicinally to one another, d) a sum of components b and c equivalent molar amount of aromatic dicarboxylic acid in which the carboxyl groups are not arranged vicinally, their preparation and Use. |