公开(公告)号：US5714570A

公开(公告)日：1998-02-03

申请号：US683123

申请日：1996-07-16

申请人： Chung Yup Kim ,  Hyun Nam Cho ,  Hoi Wan Yoo ,  Hyung Joon Kim

发明人： Chung Yup Kim ,  Hyun Nam Cho ,  Hoi Wan Yoo ,  Hyung Joon Kim

IPC分类号： B01J31/12 ,  C08F4/60 ,  C08G63/82 ,  C08G63/85 ,  C08G63/78

CPC分类号： B01J31/128 ,  C08G63/82 ,  C08G63/85 ,  B01J2231/49

摘要： A method for preparing polyester by use of a catalyst. The method comprises the steps of: esterifying either a terephthalic acid, a dicarboxylic acid containing terephthalic acid or derivatives thereof with either ethylene glycol or a glycol containing ethylene glycol, or derivatives thereof to produce an esterification product containing either bis(.beta.-hydroxyethyl) terephthalate, its low molecular weight polymer, or a combination of .beta.-hydroxyethyl terephthalate and its low molecular weight polymer; and continuously polycondensing the obtained esterification product to prepare a polyester, wherein in the said polycondensing step, a composite polymerization catalyst dissolved in an ethylene glycol or an ethylene glycol-containing solution, consisting of a compound of antimony, a compound of titanium, and a compound of tin is used. The method can considerably reduce both the esterification time and the polycondensation time and provides a good color, reduced content of diethylene glycol and reduced concentration of terminal carboxyl groups in the prepared polyesters.

摘要翻译： 一种使用催化剂制备聚酯的方法。 该方法包括以下步骤：将对苯二甲酸，含有对苯二甲酸的二羧酸或其衍生物与乙二醇或含乙二醇的二醇或其衍生物酯化，生成含有双（β-羟乙基）对苯二甲酸酯 ，其低分子量聚合物或对苯二甲酸β-羟乙酯与其低分子量聚合物的组合; 并将得到的酯化产物连续缩聚以制备聚酯，其中在所述缩聚步骤中，将溶解在乙二醇或含乙二醇的溶液中的复合聚合催化剂，其由锑化合物，钛化合物和 使用锡的化合物。 该方法可以显着降低酯化时间和缩聚时间，并提供良好的颜色，降低二甘醇含量，降低制备的聚酯中末端羧基的浓度。