Patent ID: 6376628
Filing Date: 2002-04-23
Classification: C08F

Abstract:
A method for preparing an &agr;-olefin polymer comprising the step of polymerizing or copolymerizing an &agr;-olefin in the presence of a catalyst containing:a solid catalyst constituent (A) which contains magnesium, titanium, a halogen element and an electron donor; an organoaluminum compound constituent (B); an organosilicon compound constituent (C) represented by the following general formula (1); and an organosilicon compound constituent (D) represented by the following general formulas (2) or (3) to prepare an &agr;-olefin polymer RnSi(OR)4âˆ’nâ€ƒâ€ƒ(1) wherein R is a hydrocarbon group having 1 to 8 carbon atoms, n is integer of 1 or 2wherein R1 is a hydrocarbon group having 1 to 8 atoms, R2 is a hydrocarbon group having 1 to 8 carbons atoms, a hydrocarbylamino group having 2 to 24 carbons atoms, or a hydrocarbylalkoxy group having 1 to 24 carbon atoms, R3N is a perhydroquinolino group or a perhydroisoquinolino group.