According to the present invention, there is provided an improvement which comprises adding an acid compound and if necessary an epoxy compound to a reaction product resulting from melt polycondensation reaction of an aromatic dihydroxy compound with a carbonic acid diester in the presence of an alkaline compound catalyst.
根据本发明,提供了一种改进方法,包括在芳香族二羟基化合物与
碳酸二酯在碱性化合物催化剂存在下进行熔融缩聚反应产生的反应产物中加入一种酸化合物,必要时加入一种环氧化合物。