Catalyst for polmerizing an olefin and process for...

Details Catalyst for polmerizing an olefin and process for... Catalyst for polmerizing an olefin and process for...

C - Chemistry, Metallurgy

08

F

252/109, 402/566

C08F 10/00 (2006.01) C08F 4/642 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 1325629

ABSTRACT OF THE DISCLOSURE An olefin is polymerized or copolymerized in 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 independently selected from hydrocarbon radicals, R4 is selected from the group consisiting of hydrocarbon, alkoxy, and aryloxy radicals, and m and n are independently a positive number of more than 0 and less than 3. This catalyst has a significantly high polymerization activity, and the thus produced olefin polymer or copolymer has a narrow molecular-weight distribution as well as a narrow composition distribution, a high bulk density, and excellent powder properties.

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