Method for preparing linear polycarbonate from cyclic oligomer with aryl carbanion generating catalyst

摘要

Cyclic polycarbonate oligomers are converted to linear polycarbonate resins by heating with a polycarbonate formation catalyst which generates aryl carbanions at temperatures up to about 300 DEG C. The preferred catalysts are tetraarylborates such as tetramethylammonium tetraphenylborate.