Two-dimensional benzobisoxazole rigid-rod polymers

Details Two-dimensional benzobisoxazole rigid-rod polymers Two-dimensional benzobisoxazole rigid-rod polymers

1994-07-18

1995-06-20

Michl, Paul R.

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

Synthetic resins

From reactant having a halogen atom or oxygen single bonded...

128271, 128403, 128422, 128425, C08G 6400

Patent

active

054261732

ABSTRACT:
A two-dimensional, rigid-rod polymer of the formula: ##STR1## wherein x, y and z each has a value of 5 to 40; wherein the sum of x, y and z is about 20 to 100; and wherein PBX is a repeating group of the formula: ##STR2## is prepared by the polycondensation of trimeric acid (TMA) ##STR3## with 4-[5-amino-6-hydroxybenzoxazol-2-yl]benzoic acid (ABA) ##STR4## in polyphosphoric acid (PPA).

REFERENCES:
patent: 5066769 (1991-11-01), Evers et al.
patent: 5227457 (1993-07-01), Marrocco, III et al.
patent: 5233017 (1993-08-01), Dotrong et al.
patent: 5264504 (1993-11-01), Evers et al.
Article "Multi-dimensional benzobisoxazole rigid-rod polymers" pp. 408-409 from Polymer Preprints 34(2), Aug. 1993.
M. Dotrong, M. H. Dotrong and R. C. Evers, "Multi-dimensional Benzobisoxazole Polymers", Polymer Preprints, 34(2), Aug. 1993, pp. 408-409.

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