Rigid-rod benzimidazole pendant benzobisazole copolymer

Details Rigid-rod benzimidazole pendant benzobisazole copolymer Rigid-rod benzimidazole pendant benzobisazole copolymer

1991-04-16

1992-07-07

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528183, 528190, 528339, 528341, 528342, 528344, 528348, C08G 7318, C08G 7322, C08G 7532

Patent

active

051284430

ABSTRACT:
Provided is a para-ordered aromatic heterocyclic copolymer having repeating units of the formula --(--Q--Ar--).sub.m --(--Q--Ph--).sub.n -- wherein Q is ##STR1## wherein X is --O--, --NH-- or --S--, m is 0.05 to 0.50 and n is 1.0--m, Ph is 1,4-phenylene, and wherein Ar is ##STR2##

REFERENCES:
patent: 4892921 (1990-01-01), Tsai et al.
patent: 4892953 (1990-01-01), Arnold et al.

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