发明授权
US07250483B2 Inhibition of catalytically active impurities in polycarbonate by the melt transesterification process 有权
通过熔融酯交换法抑制聚碳酸酯中的催化活性杂质

Inhibition of catalytically active impurities in polycarbonate by the melt transesterification process
摘要:
An improvement to the melt transesterification process for the preparation of polycarbonate is disclosed. The improvement entails adding to the process between its medium viscosity reactor and a high viscosity reactor at least one bridged ester of organic sulphur-containing acid.
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