Rigid-rod benzobisazole polymer containing cyclic phosphate este

Details Rigid-rod benzobisazole polymer containing cyclic phosphate este Rigid-rod benzobisazole polymer containing cyclic phosphate este

1992-05-22

1993-04-06

Anderson, Harold D.

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

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

528167, 528183, 528185, 528186, 528336, 528337, 528342, C08G 7904

Patent

active

052004953

ABSTRACT:
Rigid-rod aromatic heterocyclic polymers having repeating units of the formula: ##STR1## wherein Ba is a benzobisazole moiety of the formula: ##STR2## wherein X is --O--, --S-- or --NH.

REFERENCES:
patent: 4892921 (1990-01-01), Tsai et al.
patent: 4900806 (1990-02-01), Arnold et al.
patent: 4960853 (1990-10-01), Arnold et al.
patent: 4960859 (1990-10-01), Arnold et al.
patent: 5021580 (1991-06-01), Lysenko
patent: 5081256 (1992-01-01), Arnold et al.
Chen, J. P. and Arnold, F. E., "Rigid-Rod Benzobisazole Polymers Containing Cyclic Phosphate Ester Groups" Polymer Preprints, 32 (199), pp. 209-210, Jun. 1991.

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