Thermotropic liquid crystalline polyesters from 2-methylhydroqui

Details Thermotropic liquid crystalline polyesters from 2-methylhydroqui Thermotropic liquid crystalline polyesters from 2-methylhydroqui

1990-10-24

1992-05-19

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

523527, 524599, 524601, 528176, 528193, 528194, C08G 6300, C08G 6302, C08K 340, C08J 6700

Patent

active

051150808

ABSTRACT:
This invention relates to thermotropic liquid crystalline polyester compositions containing recurring units derived from 2-methylhydroquinone, terephthalic acid, 2,6-napthalenecarboxylic acid, and hydroquinone, characterized as having a heat distortion temperature of greater than 200.degree. C. and improved elongation. The inclusion of a reinforcing/filling agent selected from the group consisting of glass reinforcing agents, glass fillers, carbon metasilicate, calcium carbonate, talc, titanium dioxide, and calcined aluminum silicate in said compositions, and also in those same compositions lacking recurring units of hydroquinone, results in an improvement in the elongation of said compositions. The inclusion of carbon fiber into these compositions results in no significant decrease in the elongation of said compositions. The compositions are useful as films, fibers, and shaped articles.

REFERENCES:
patent: 4093595 (1978-06-01), Elliott
patent: 4118372 (1978-10-01), Schaefgen
patent: 4247514 (1981-01-01), Luise
patent: 4342862 (1982-08-01), Jackson, Jr. et al.
patent: 4536562 (1985-08-01), Deex

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