METHOD FOR CONTINUOUS PRODUCTION OF HIGH MOLECULAR WEIGHT POLYCARBONATE RESIN

摘要

The present invention addresses the problem of providing a method for the continuous production of a high molecular weight polycarbonate resin comprising a step (A) for obtaining an aromatic polycarbonate prepolymer by polycondensation reaction of an aromatic dihydroxy compound and a carbonic acid diester and a step (B) for subjecting the resulting aromatic polycarbonate prepolymer and an aliphatic diol compound to a linking reaction in a linking reactor for increasing molecular weight wherein the continuous production method is improved the retention time of the reaction mixture inside the linking reactor for increasing molecular weight is shortened and performance of the resulting polycarbonate resin is enhanced. The aromatic polycarbonate prepolymer of step A is continuously fed to the linking reactor for increasing molecular weight and the aliphatic diol is continuously fed to the linking reactor for increasing molecular weight and reacted under conditions in which a degree of depressurization is 10 torr or less.