| abstract |
PROBLEM TO BE SOLVED: To provide a method for stably producing an aromatic polycarbonate which is excellent in hue and has no fluctuation in molecular weight, in order to solve a problem in quality of a polycarbonate obtained by a transesterification method. Offer. In a method for producing an aromatic polycarbonate by continuously melt-polycondensing an aromatic dihydroxy compound and a carbonic acid diester in the presence of a transesterification catalyst, a catalyst solution obtained by dissolving a transesterification catalyst in a solvent is used. When transferring from the catalyst solution tank to the reaction tank and adding it to the melt in the tank, at least a portion of the addition device installed in the reaction tank and the device attached thereto that comes into contact with the catalyst solution is a catalyst. A method for producing an aromatic polycarbonate, comprising a material having a contact angle with a solution of 50 ° or more. |