Liquid-crystalline polycondensates which contain urea derived linking groups
AssigneeBASF SE
InventorsHans-Jakob Kock, Bernd Hisgen, Michael Portugall
Life of this patent
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Abstract
Liquid-crystalline carbamyl-containing polycondensates composed of (a) aromatic hydroxycarboxylic and/or aminocarboxylic acids in which the hydroxyl and amino groups are not vicinal to the carboxyl group, (b) from 0.1 to 20 mol % of urea, (c) aromatic dihydroxy, diamino and/or hydroxy-amino compounds in which the hydroxyl and amino groups are not vicinal, (d) a molar amount equivalent to the total amount of components b and c of an aromatic dicarboxylic acid in which the carboxyl groups are not vicinal, the preparation thereof and fibers, films and moldings prepared therefrom.
Claims7
A liquid-crystalline carbamyl-containing polycondensate composed of
- (a) aromatic hydroxycarboxylic and/or aminocarboxylic acids in which the hydroxyl and amino groups are not vicinal to the carboxyl group,
- (b) from 0.1 to 20 mol % of urea,
- (c) aromatic dihydroxy, diamino and/or hydroxy-amino compounds in which the hydroxyl and amino groups are not vicinal,
- (d) a molar amount equivalent to the total amount of components b and c of an aromatic dicarboxylic acid in which the carboxyl groups are not vicinal.
Dependencies are inferred from the claim text.