CATALYST COMPONENT FOR PROPYLENE POLYMERIZATION, PREPARATION METHOD THEREFOR AND CATALYST HAVING SAME

摘要

Disclosed is a catalyst component for propylene polymerization in the present invention, comprising titanium, magnesium, halogen, and internal electron donor compound A. Said internal electron donor compound A is selected from compounds represented by general formula I, wherein R is selected from hydrogen, hydroxyl and substituted or unsubstituted C1-C30 hydrocarbyl, and preferably selected from hydrogen, hydroxyl and substituted or unsubstituted C1-C20 alkyl, C6-C30 aryl, C6-C30 heteroaryl, C7-C30 alkaryl and C7-C30 aralkyl; R1 and R2 identically or differently are selected from hydrogen and substituted or unsubstituted C1-C30 hydrocarbyl, and preferably selected from hydrogen and substituted or unsubstituted C1-C20 alkyl, C6-C30 aryl, C7-C30 alkaryl and C7-C30 aralkyl. According to the present invention, the catalyst employing the compound presented by general formula I as internal electron donor compound has high catalytic activity and slow active decay when applied to propylene polymerization. The obtained polymer has high melt index, broad molecular weight distribution (MWD) and high isotacticity.