The present invention provides an improved method for continuously producing a high-molecular-weight polycarbonate resin by carrying out a linking and highly-polymerizing reaction of an aromatic polycarbonate prepolymer with an aliphatic diol compound wherein the retention time of the reaction mixture in the linking and highly-polymerizing reactor is shortened to achieve excellent performance.
The process comprises a process (A) for producing an aromatic polycarbonate prepolymer by polycondensation reaction of an aromatic dihydroxy compound with diester carbonate and a process(B) for conducting linking and highly-polymerizing reaction of the aromatic polycarbonate prepolymer with an aliphatic diol compound in the linking and highly-polymerizing reactor, wherein the aromatic polycarbonate prepolymer produced by the process (A) is fed continuously to the linking and highly-polymerizing reactor, while the aliphatic diol compound is fed continuously thereto under reduced pressure of 10 torr or less to carry out the reaction.
本发明提供了一种通过芳香族聚
碳酸酯预聚物与脂肪族二元醇化合物进行连接和高度聚合反应连续生产高分子量聚
碳酸酯
树脂的改进方法,其中缩短了反应混合物在连接和高度聚合反应器中的停留时间,以实现优异的性能。
该工艺包括通过芳香族二羟基化合物与
碳酸二酯的缩聚反应生产芳香族聚
碳酸酯预聚物的工艺 (A),以及在连接和高度聚合反应器中进行芳香族聚
碳酸酯预聚物与脂肪族二醇化合物的连接和高度聚合反应的工艺 (B)、其中,由工艺(A)生产的芳香族聚
碳酸酯预聚物被连续送入连接和高度聚合反应器,而脂肪族二元醇化合物在 10 托或更小的减压下被连续送入该反应器以进行反应。