MIXED METALLOCENE CATALYST SYSTEM CONTAINING POOR COMONOMER INCORPORATOR AND GOOD COMONOMER INCORPORATOR

摘要

PROBLEM TO BE SOLVED: To provide an olefin polymerization method using a catalyst system containing polymerization catalyst compounds for producing polymer and polymer blend, low in comonomer incorporation and having high activity and high performance.

SOLUTION: The olefin polymerization method for producing polymer products comprises bringing ethylene and at least one comonomer into contact with a catalyst system, wherein the catalyst system comprises a poor comonomer incorporating catalyst compound having at least one fused ring cyclopentadienyl-based ligand and a good comonomer incorporating catalyst compound, the poor comonomer incorporating catalyst compound produces higher density polyethylene than bisindenyl zirconium dichloride (Ind)2ZrCl2when producing on the same process conditions and is a polymerization catalyst requiring at least two times comonomer/monomer molar ratio of the good comonomer incorporating catalyst compound when producing the same density polymer, and the polymer products have bimodal composition distribution.

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