alpha -olefin polymerization catalyst system and process for producing alpha -olefin catalyst

摘要

An alpha -olefin polymerization catalyst system having so high a catalytic activity and stereoregularity that the catalyst residue and amorphous polymer need not be removed and a process for producing an alpha -olefin polymer using the catalyst system, said catalyst system consisting essentially of: (A) a trivalent titanium compound-containing solid catalyst component prepared by reducing a titanium compound, represented by the general formula Ti(OR1)aX4-a in which R1 represents a hydrocarbon group having 1 to 20 carbon atoms; X represents a halogen atom; and a represents a numeral satisfying 0