Melt processable thermotropic aromatic copolyesters

Details Melt processable thermotropic aromatic copolyesters Melt processable thermotropic aromatic copolyesters

1989-05-04

1990-08-07

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, C08G 6302

Patent

active

049469266

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; recurring structural units (b) independently each occurrence selected from the group consisting of Formulas III and V; recurring structural units (c) independently each occurrence selected from the group consisting of Formula IV; and optionally recurring structural units (d) independently each occurrence selected from the group consisting of Formula VI: ##STR1## wherein R independently each occurrence is a chemically inert substituent.

REFERENCES:
patent: 3637595 (1969-05-01), Cottis et al.
patent: 3975487 (1976-08-01), Cottis et al.
patent: 3991014 (1976-11-01), Kleinschuster
patent: 4067852 (1978-01-01), Calundann
patent: 4118372 (1978-10-01), Schaefgen
Chemical Abstracts: vol. 109: 110995e, "Fully Aromatic Poly(ether-Esters)," De Abajo, J.

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