| abstract |
α-Olefin polymers of high stereoregularity are prepared by polymerizing the α-olefin with a catalyst prepared by mixing components (A), (B) and (C): n (A) a solid titanium component prepared from an organo-magnesium compound, a silicon halide compound and/or an aluminum halide compound, an electron donor and TiCl 4 , n (B) an organoaluminum activator, and n (C) an electron donor. |