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US 5,496,912 AGranted
Thermotropic liquid crystal aromatic polysters
AssigneeHimont Italia S.r.l.
InventorsGiuseppe Motroni, Mauro Maritano, Alfredo Coassolo, Giovanni Giunchi
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Abstract
Thermotropic melt processable liquid crystalline aromatic polyesters comprising units derived from a dicarboxylic acid and from a mixture of aromatic diols in which from 50% to 80% is (1-phenylethyl)hydroquinone and from 20% to 50% is hydroquinone.
Claims4
A process for making molded articles, films and fibers, said process comprising melt processing a thermotropic liquid crystalline polyester comprising:
- a) units derived from at least one aromatic bicarboxylic acid in a mole percentage of 50% with respect to the total mole amount;
- b) units derived from a substituted hydroquinone ##STR2## where R is selected from the group consisting of (1-phenylethyl), (1-methyl-1-phenylethyl), benzyl, benzoyl, phenoxy, and mixtures thereof, optionally substituted, in a mole percentage of from 37.5% to 40% with respect to the total mole amount;
- c) units derived from hydroquinone in a mole percentage of from 10% to 12.5 % with respect to the total mole amount.
Dependencies are inferred from the claim text.