Catalyst for polymerizing an olefin and process for polymerizing an olefin

摘要

An olefin is polymerized or copolymerized under the presence of an olefin-polymerizing catalyst prepared from (A) a transition-metal compound or (A') a transition-metal compound loaded on a fine-particle carrier, said transition metal being selected from group IVB in the periodic table; (B) an aluminoxane; and (C) an organoaluminum compound represented by the general formula [I] or [II]: R1mAl(OR2)3-m[I] R3nAl(OSiR43)3-n[II] wherein R1, R2, and R3 are selected from hydrocarbon radicals, R4 is selected from the group consisting of hydrocarbon, alkoxy, and aryloxy radicals, and m and n are positive numbers of 0