Melt processable thermotropic aromatic copolyesters

Details Melt processable thermotropic aromatic copolyesters Melt processable thermotropic aromatic copolyesters

1990-09-10

1991-12-10

Kight, III, John

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528176, 528190, 528194, 528271, 528272, C08G 6300, C08G 6302, C08G 6318

Patent

active

050719424

ABSTRACT:
The invention relates to a class of copolymers capable of forming an optically anisotropic melt comprising recurring structural units (a) independently each occurrence selected from the group consisting of Formula I; recurring structural units (b) independently each occurrence selected from the group consisting of Formulas II and III; 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 V: ##STR1## wherein R independently each occurrence is a chemically inert substituent.

REFERENCES:
patent: 4333907 (1982-06-01), Urasaki et al.
patent: 4447593 (1984-05-01), Funakoshi et al.
patent: 4664972 (1987-05-01), Connolly
patent: 4857626 (1989-08-01), Kirshiro et al.

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