A CATALYST FOR HOMOPOLYMERIZING AND COPOLYMERIZING PROPYLENE AND ITS PREPARATION AND USE
申请人:Petrochina Company Limited
公开号:EP2345675A1
公开(公告)日:2011-07-20
A catalyst for homopolymerizing and copolymerizing propylene and its preparation and use. The catalyst component includes titanium compound containing at least one Ti-halogen bond and at least two kinds of electron donor compounds A and B supported on MgCl2.nROH adduct, wherein the electron donor compound A is a compound of formula (I), the electron donor compound B is ester or ether compound; the molar ratio between compound A and compound B is 0.1-5; the molar ratio between the total amounts of the two kinds of electron donors and MgCl2.nROH is 0.01-1, based on the amount of MgCl2.nROH; and the molar ration between the titanium compound containing Ti-halogen bond and MgCl2.nROH is 1-200. The catalyst has high activity high stereospecificity and good copolymerization performance. In addition, the morphology of the polymer obtained therefrom is good.
一种用于均聚和共聚丙烯的催化剂及其制备和使用方法。催化剂组分包括含有至少一个钛卤键的钛化合物和至少两种支撑在 MgCl2.nROH 加合物上的电子供体化合物 A 和 B,其中电子供体化合物 A 为式(I)化合物,电子供体化合物 B 为酯或醚化合物;化合物 A 和化合物 B 的摩尔比为 0.1-5;以MgCl2.nROH的量计,两种电子供体与MgCl2.nROH总量的摩尔比为0.01-1;含Ti-卤素键的钛化合物与MgCl2.nROH的摩尔比为1-200。该催化剂具有高活性、高立体特异性和良好的共聚性能。此外,由此获得的聚合物的形态也很好。