阅读说明：本技术 氧化稳定性改进的聚碳酸酯组合物和其制备方法 (Polycarbonate compositions with improved oxidative stability and process for their preparation ) 是由 A·D·博雅斯基 I·维克费尔南德斯 于 2019-12-05 设计创作，主要内容包括：公开了一种在聚合系统中制备聚碳酸酯组合物的方法,所述聚合系统包括单体混合单元、低聚区段和聚合区段。所述方法包括在季鏻催化剂的存在下使二羟基化合物与碳酸二芳基酯化合物熔融聚合,以产生具有含磷副产物的所述聚碳酸酯组合物,所述含磷副产物具有所述季鏻催化剂或所述碳酸二芳基酯化合物中的至少一者。所述方法进一步包括使所述含磷副产物再循环进入所述聚合系统的所述单体混合单元,并且从所述聚合系统中去除所述聚碳酸酯组合物。所述再循环流具有高于或等于40ppm的磷浓度。(A method of preparing a polycarbonate composition in a polymerization system comprising a monomer mixing unit, an oligomerization section, and a polymerization section is disclosed. The method includes melt polymerizing a dihydroxy compound and a diaryl carbonate compound in the presence of a quaternary phosphonium catalyst to produce the polycarbonate composition having a phosphorus-containing byproduct having at least one of the quaternary phosphonium catalyst or the diaryl carbonate compound. The method further includes recycling the phosphorus-containing byproduct into the monomer mixing unit of the polymerization system and removing the polycarbonate composition from the polymerization system. The recycle stream has a phosphorus concentration greater than or equal to 40 ppm.)

相关申请的交叉引用

本申请要求2018年12月5日提交的EP申请号18382900.1和2019年1月4日提交的美国专利申请号62/788,202的优先权，所述两个申请以引用的方式整体并入本文。