Patent ID: 7135532

Claim:
A process for producing an α-olefin polymer, which comprises the steps of: (1) reducing a titanium compound represented by the following formula [I] with an organomagnesium compound in the presence of an organosilicon compound having an Si—O bond, thereby obtaining a solid product, (2) contacting the solid product with a halogeno compound of a Group 14 element selected from the group consisting of Si, Ge, Sn and Pb; at least one member selected from the group consisting of an electron donor compound (E1) and an organic acid halide; and a compound having a Ti-halogen bond, thereby obtaining a solid catalyst component (1) for α-olefin polymerization, (3) contacting the solid catalyst component (1), an organoaluminum compound and an electron donor compound (E2) with one another, thereby obtaining a catalyst (1) for α-olefin polymerization, and (4) subjecting an α-olefin to homopolymerization or copolymerization in the presence of the catalyst (1), wherein “a” is a number of 1 to 20, R 2 is a hydrocarbon group having 1 to 20 carbon atoms, and X 2 is a halogen atom or a hydrocarbyloxy group having 1 to 20 carbon atoms, and all of X 2 may be the same or different from one another.