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US 4,900,806 AGranted
Rigid rod aromatic benthiazole heterocyclic copolymer
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsFred E. Arnold, Jerry L. Burkett
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Abstract
There are provided copolymers having repeating units of the formula ##STR1## wherein R.sub.1 is --H or ##STR2## wherein X is --S--, --O-- or --NH--; and wherein Y ranges from about 0.02 to 0.20 and z is 1.0-y.
Claims11
An aromatic heterocyclic copolymer having repeating units of the formula ##STR7## wherein R.sub.1 is --H or ##STR8## wherein X is --S--;
- and wherein y ranges from about 0.02 to 0.20 and z is 1.0-y.
Dependencies are inferred from the claim text.