Processes for producing aromatic polycarbonate oligomer and aromatic polycarbonate
申请人:MITSUI TOATSU CHEMICALS, Inc.
公开号:EP0581074A2
公开(公告)日:1994-02-02
A process for producing continuously an aromatic polycarbonate oligomer by reacting an aromatic dihydroxy compound and an alkali metal base or an alkaline earth metal base with a carbonyl halide compound comprises:
(1) feeding continuously to a tank reactor an aromatic dihydroxy compound, water, a molecular weight controlling agent, a polymerization catalyst, a carbonyl halide compound, and an organic solvent, and an alkali metal base or an alkaline earth metal base in an amount of 1.15 - 1.6 equivalents based on the aromatic dihydroxy compound,
(2) carrying out the reaction with a residence time as defined by the following formula,
log Y < - 2.19 X + 1.84
(0.0005 ≦ X < 0.84, 1 ≦ Y < 69)
where X is an amount of the polymerization catalyst in terms of mole % based on the amount of mole of the aromatic dihydroxy compound fed per unit time, and Y is a residence time (min.), and
(3) continuously withdrawing the reaction mixture from the tank reactor to obtain an aromatic polycarbonate oligomer having a number average molecular weight of 1,000 - 10,000. An aromatic polycarbonate is produced by polycondensation of the aromatic polycarbonate oligomer.
一种通过芳香族二羟基化合物和碱金属碱或碱土金属碱与羰基卤化合物反应连续生产芳香族聚碳酸酯低聚物的工艺,包括
(1) 将芳香族二羟基化合物、水、分子量控制剂、聚合催化剂、羰基卤化化合物和有机溶剂以及碱金属碱或碱土金属碱连续加入罐式反应器中,以芳香族二羟基化合物为基准,加入量为 1.15-1.6 当量、
(2) 按下式规定的停留时间进行反应、
log Y < - 2.19 X + 1.84
(0.0005 ≦ X < 0.84, 1 ≦ Y < 69)
其中,X 是聚合催化剂的量,以单位时间内加入的芳香族二羟基化合物摩尔量的摩尔%为基准,Y 是停留时间(分钟),以及
(3) 从罐式反应器中连续抽出反应混合物,以获得平均分子量为 1,000 - 10,000 的芳香族聚碳酸酯低聚物。通过芳香族聚碳酸酯低聚物的缩聚反应生产出芳香族聚碳酸酯。