Back to results
US 5,041,522 AGranted
Dihydroxy-pendant rigid-rod benzobisazole polymer
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsThuy D. Dang, Hoe H. Chuah, Loon S. Tan, Fred E. Arnold
Life of this patent
Estimating the term…
Abstract
There are provided novel rod-like heterocyclic aromatic polymers having repeating groups of the formula: ##STR1## wherein Y is --S--, --O-- or --NR--, R is --H, an alkyl group having 1 to 4 carbon atoms or an aromatic group having 1 or 2 aromatic rings, and the bullet symbol (.cndot.) indicates hydrogen bonding.
Claims2
A rod-like heterocyclic aromatic polymer having repeating groups of the formula:
- ##STR5##
A rod-like heterocyclic aromatic polymer having repeating groups of the formula:
- ##STR6##
Dependencies are inferred from the claim text.