Patent ID: 7060764
Filing Date: 2006-06-13
Classification: C08F

Abstract:
1. A method for polymerization and copolymerization of ethylene, which is carried out in the presence of a preactivated solid titanium catalyst and an organometallic compound of metal in Group II or III of the Periodic Table, wherein the preactivated solid titanium catalyst is prepared by the procedure comprising: (i) preparing a magnesium solution by contact-reacting a halogenated magnesium compound with an alcohol; (ii) reacting the magnesium solution with an ester compound having at least one hydroxyl group and a silicon compound having at least one alkoxy group; (iii) producing solid titanium catalyst by reacting the magnesium solution of (ii) with a mixture of a titanium compound and a haloalkane compound; and (iv) preactivating the solid titanium catalyst with diethylaluminum chloride, ethylaluminumdichloride, ethylaluminumsesquichloride, isoprenylaluminum, or mixtures thereof.