Melt processable thermotropic aromatic copolyester derived from

Details Melt processable thermotropic aromatic copolyester derived from Melt processable thermotropic aromatic copolyester derived from

1989-05-04

1990-07-31

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528271, 528272, 525390, 525397, 525418, 525450, C08G 6302, C08G 6300

Patent

active

049451502

ABSTRACT:
The invention relates to a class of copolyesters which display optical anisotropy in the molten state and to the shaped articles, fibers and films obtained from the optically anisotropic melts. the copolyesters comprise recurring structural units (a) independently each occurrence selected from the group consisting of Formulas I and II; and recurring structural units (b) independently each occurrence selected from the group consisting of Formula III; ##STR1## wherein R independently each occurrence is a chemically inert substituent.

REFERENCES:
patent: 3991014 (1976-11-01), Kleinschuster
patent: 4066620 (1978-01-01), Kleinschuster
Chemical Abstracts, vol. 198:(14); 110995c, Fully Aromatic Poly(ether-esters), De Abajo, J.
Japanese Laid Open Appl. JP245382, May 1988, ASAHI Chemical Ind KK.
Japanese Laid Open Appl. JP35794 (1978), "Aromatic Polyesters from Hydroxyphenoxybenzoic Acid Derivatives", Era, Susumu et al.

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