| abstract |
(57) [Abstract] [Purpose] To produce highly stereoregular polyolefin with high polymerization activity. [Structure] [A] Titanium compound [B] Organoaluminum compound [C] Organosilicon compound such as dicyclopentyldimethoxysilane, t-butylethyldimethoxysilane, di-t-butyldimethoxysilane, [D] Iodine, ethyl iodide, etc. The α-olefin is prepolymerized in the presence of the iodine compound. |