PROBLEM TO BE SOLVED: To obtain an improved catalyst system having a desired combination of a high level of a long-chain branch with an improved catalyst activity/ efficiency and advantageously usable for producing an olefin polymer such as an EPDM terpolymer. SOLUTION: This method for producing an olefin polymer having a long-chain branch comprises a stage of polymerizing an olefin monomer in the presence of a catalyst system comprising a catalyst containing a compound containing vanadium without having a halogen directly bonded to the vanadium, an organoaluminum cocatalyst in a molar ratio of the halogen to the aluminum within the range of about 1 to about 2 and an activator represented by the formula [R1, R2, R3, R4 and a part-C(O)OR1 are as defined in the specification].

Title
Olefin polymer having long branch, its production and catalyst system therefor
Application Number
11-175724
Publication Number
2000-034314
Application Date
June 22, 1999
Publication Date
February 2, 2000
Inventor
Padliya Dilipkumar
Zahalka Hayder A
Assignee
Bayer
IPC
C08F 10/00
C08F 04/68