Single stage production of improved high molecular weight polybenzimidazole.

摘要

This invention provides a single stage melt polymerisation process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an organosilicon halide polymerisation catalyst.

The process provides poly-2,2'-(m-phenylene)-5,5'- bibenzimidazole of improved colour and Plugging Value and is further characterised by an Inherent Viscosity of at least about 0.7 dl/g and a weight average molecular weight of at least about 100,000.