| abstract |
PURPOSE: To obtain a discoloration-free high-quality aromatic polycarbonate by polymerizing an aromatic dihydroxy compound with a diaryl carbonate having a chlorine content of a specified value or below and a xanthone content of a specified value or below in the absence of any catalyst. n CONSTITUTION: A process for producing an aromatic polycarbonate by reacting an aromatic dihydroxy compound (e.g. bisphenol A) with a diaryl carbonate (e.g. diphenyl carbonate), wherein the reaction is performed in the absence of any polymerization catalyst and the diaryl carbonate has a chlorine content of 0.05ppm or below and a xanthone content of 10ppm or below. According to the above process, a discoloration-free high-quality aromatic polycarbonate can be obtained. n COPYRIGHT: (C)1992,JPO&Japio |