Patent ID: 8470941
Filing Date: 2013-06-25
Classification: C08F

Abstract:
1. A catalyst for polymerizing propylene, comprising a titanium compound having at least one Ti-halogen bond, a first electron donor compound A supported on a MgCl 2 .nROH adduct, wherein n is 1.5-4, and R is C 1 -C 4 alkyl, and a second electron donor compound B supported on said MgCl 2 .nROH adduct; wherein the electron donor compound A is a sulphonyl compound of formula (I): wherein, X is selected from the group consisting of unsubstituted Group 14 elements, unsubstituted Group 15 elements, unsubstituted Group 16 elements, disubstituted Group 14 elements with a substituent which can be monocycle, polycycle, heteroatom-containing cyclic group or various aliphatic chainlike groups, and mono substituted Group 15 elements with a substituent which can be monocycle, polycycle, heteroatom-containing cyclic group or various aliphatic chainlike groups, and wherein X is C(R R and wherein the electron donor compound B is an ester or an ether compound; and wherein the molar ratio of electron donor compound A to electron donor compound B is between 0.1:1 and 5:1; and wherein the molar ratio of the total amounts of the two kinds of electron donors to MgCl and wherein the molar ratio of the titanium compound containing Ti-halogen bond to MgCl