Single stage production of improved high molecular weight polybenzimidazole with organosilicon halide catalyst.

摘要

This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an organosilicon halide polymerization catalyst. The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an Inherent Viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.