| abstract |
(57) [Abstract] [Purpose] To obtain a catalyst system using a transition metal compound and a novel aluminum compound, which has high activity productivity and is capable of producing a high molecular weight polyolefin. [Structure] General formula AlR 1 R 2 R 3 [R 1 is -X 1 R 4 (X 1 is a group 15 or 16 element, R 4 is an electron-withdrawing group, R 2 and R 3 are each a hydrogen atom, a halogen atom, R 1 , a hydrocarbon group having 1 to 20 carbon atoms and an oxygen containing hydrocarbon group having 1 to 20 carbon atoms. Selected from the group], a polymerization catalyst comprising an aluminum compound (B) represented by the formula [B], a component (B) and a transition metal compound (A), a component (A), a component (B) and an organoaluminum compound (C). Polymerization catalysts and methods for producing polyolefins using these catalysts. |