Process for the preparation of high molecular weight poly (arylcarbonates).

摘要

Process for the preparation of high molecular weight poly(arylcarbonate), the molecular weight ranging from 45,000 - 60,000 (corresponding to ninh 0.8 to 1.0). The process involves heating in a controlled manner, a BPA-polycarbonate oligomer in the presence of a catalyst selected from alkali metal aryl acid, alkali metal borohydrial and a quarternary ammonium salt of bioxiyanion derived from a carboxylic acid poly(arylcarbomate)s of high molecular weight produced by the process show enhanced crystallinity.