Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1990-03-23
1991-08-20
Anderson, Harold D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528186, 528193, C08G 7532
Patent
active
050415220
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.
REFERENCES:
patent: 4835246 (1989-05-01), Tsai et al.
Arnold Fred E.
Chuah Hoe H.
Dang Thuy D.
Tan Loon S.
Anderson Harold D.
Bricker Charles E.
Singer Donald J.
The United States of America as represented by the Secretary of
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