Liquid crystalline polyesters

Details Liquid crystalline polyesters Liquid crystalline polyesters

1994-12-21

1995-07-11

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528193, 528219, 528272, 528302, 528303, 528306, 528308, 5283086, C08G 6354

Patent

active

054322499

ABSTRACT:
The present invention provides a novel liquid crystalline polyester comprising structural units represented by the following general formulae A, B, C and D: ##STR1## where X and Y are each independently H, Cl, Br or an alkyl group having 1 to 4 carbon atoms, the molar ratio of A/B is in the range from 49/1 to 20/30 and that of C/D is in the range from 10/40 to 45/5.

REFERENCES:
patent: 4284710 (1981-08-01), Burg
patent: 4343888 (1982-08-01), Burg
patent: 4421841 (1983-12-01), Shimizu et al.
patent: 4517349 (1985-05-01), Fujiwara et al.
W. R. Krigbaum et al. (1983) Thermotropic Homopolyesters. III. Preparation and Properties of Polymers Based on 4'-Hydroxyphenyl-4-Hydroxycinnamate, J. Pol. Sci.: Pol. Phys. Ed. 21:1851-1872.
F. Navarro et al. (1989) Synthesis and Properties of Two New Series of Isomeric Liquid Crystalline Polyesters with Conjugated Double Bonds, J. Pol. Sci.: Part A: Pol. Chem. 27:3691-3701.
F. Navarro et al. (1992) Thermotropic Aromatic Copolyesters of Catechol, J. Pol. Sci.: Part A: Pol. Chem. 30:1789-1798.

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