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US 5,312,876 AGranted
Water soluble rigid-rod polymer
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsThuy D. Dang, Fred E. Arnold
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Abstract
Water-soluble rigid-rod aromatic heterocyclic polymers having repeating units of the formula: ##STR1## wherein n has a value of 0.05 to 1.00, M is an alkali metal, Q is a benzobisazole of the formula ##STR2## wherein X is --S-- or --O--, and R is selected from the group consisting of: ##STR3##
Claims6
A water-soluble rigid-rod aromatic heterocyclic polymer having repeating units of the formula:
- ##STR7## wherein n has a value of 0.05 to 1.00, M is an alkali metal, Q is a benzobisazole of the formula ##STR8## wherein X is --S-- or --O--, and R is ##STR9##
Dependencies are inferred from the claim text.