公开(公告)号：US6060579A

公开(公告)日：2000-05-09

申请号：US47556

申请日：1998-03-25

申请人： Hiroyuki Ohme ,  Motoki Hiratsuka ,  Katsuo Nogami

发明人： Hiroyuki Ohme ,  Motoki Hiratsuka ,  Katsuo Nogami

IPC分类号： C08G63/78 ,  C08G63/85

CPC分类号： C08G63/85 ,  C08G63/78

摘要： A method for producing polybutylene terephthalate comprising continuously esterifying a dicarboxylic acid component consisting essentially of terephthalic acid with a diol component consisting essentially of 1,4-butanediol followed by polycondensing the resulting oligomer, wherein the esterification is effected in a molar ratio, P, of the diol component to the dicarboxylic acid component to fall between 1.1 and 1.6, in the presence of a combination of an organic titanium compound and an organic tin compound that satisfies the following requirement:amount of organic titanium compound (mol %).ltoreq.0.08.times.P-0.07where P=molar ratio of diol component to dicarboxylic acid component, and is followed by the polycondensation.

摘要翻译： 一种聚对苯二甲酸丁二醇酯的制造方法，其特征在于，将基本上由对苯二甲酸组成的二羧酸成分与主要由1,4-丁二醇组成的二醇成分连续酯化，然后使得到的低聚物缩聚，其中酯化反应的摩尔比P 在有机钛化合物和有机锡化合物的组合的存在下，二羧酸成分降解至1.1〜1.6，有机钛化合物的含量满足以下要求：有机钛化合物的量（摩尔％）≤0.08 xP-0.07其中P =二醇组分与二羧酸组分的摩尔比，然后进行缩聚。