Bead polymerization process for preparing polybenzimidazole

Details Bead polymerization process for preparing polybenzimidazole Bead polymerization process for preparing polybenzimidazole

1981-08-07

1983-07-19

Anderson, Harold D.

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

Synthetic resins

From carboxylic acid or derivative thereof

528331, 528336, C08G 6904

Patent

active

043945007

ABSTRACT:
Polybenzimidazoles are prepared in the form of small particles by reaction of bis(o-diamine) substituted compounds with dicarboxylic acids or of o-diamino-substituted carboxylic acids in the presence of an inert, nonsolvent, liquid medium and polyphosphoric acid.

REFERENCES:
patent: Re26065 (1966-07-01), Marvel et al.
patent: 3174947 (1965-03-01), Marvel et al.

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