abstract |
(57) [Summary] (Modified) [Object] To provide an α-olefin polymerization catalyst capable of producing highly stereoregular poly α-olefin in a high yield. [Constitution] An α-olefin polymerization catalyst comprising the following 1) to 3). 1) a solid catalyst component containing magnesium, titanium, a halogen and an electron donating compound as an essential component, 2) an organoaluminum compound and 3) a compound represented by the formula: [Wherein R 1 is a substituent having a lactone skeleton structure, R 2 Is a hydrocarbon group, R 4 O, etc., R 3 is methyl or ethyl, x Is 1 or 2, y is 0 or 1, and z is 2 or 3]. As the organosilicon compound, for example, 2-methyl-3-oxa-4-oxocyclopentyldimethoxyisopropoxysilane or the like is used. |