SOLID TITANIUM CATALYST COMPONENT FOR OLEFIN POLYMERIZATION,OLEFIN POLYMERIZATION CATALYST, PREPOLYMERIZED POLYOLEFIN-CONTAINING CATALYST AND METHOD OF OLEFIN POLYMERIZATION

摘要

A solid titanium catalyst component ¢Ia! containing magnesium, halogen, titanium and a compound having at least two ether linkags with a plurality of intermediately existing bonding atoms; a catalyst and a prepolymerized olefin-containing catalyst prepared by using the solid titanium catalyst component ¢Ia!; a method for preparing a polyolefin wherein said catalyst or prepolymerized olefin containing catalyst is used. A catalyst and a prepolymerized olefin containing catalyst prepared by using a solid titanium catalyst component ¢Ib! containing magnesium, halogen, titanium and a specific electron donor (a1), and a compound having at least two ether linkags with a plurality of intermediately existing bonding atoms; a method for preparing a polyolefin wherein said catalyst or prepolymerized olefin containing catayst is used. By virtue of the use of the catalysts or the prepolymerized olefin-containing catalysts, the polymerization reaction efficiently proceeds with high catalytic activity, giving polymers high in stereospecificity