MIXED METALLOCENE CATALYTIC SYSTEMS CONTAINING A COMPONENT CAUSING POOR INSERTION OF COMONOMER AND A COMPONENT CAUSING GOOD INSERTION OF COMONOMER Russian patent published in 2007 - IPC C08F10/00 C08F210/14 C08F4/646 

FIELD: polymerization catalysts.

SUBSTANCE: invention relates to polymerization catalyzing compounds, catalytic systems including thereof, and to their use in polymerization of ethylene and at least one more comonomer. Provided is olefin polymerization process resulting in ethylene-based polymer product, which process comprises bringing ethylene and at least one comonomer into contact with catalytic system, wherein this catalytic system contains (i) metallocene catalytic compound ensuring inclusion of a small amount of comonomer including at least one ligand based on cyclopentadienyl with condensed cycles and (ii) metallocene catalytic compound ensuring inclusion of comonomer in larger amount than compound ensuring inclusion of a small amount of comonomer, and wherein polymer product obtained is characterized by bimodal composition distribution.

EFFECT: enabled production of polymers easy to process into products, preferably into polyethylene-based films with improved properties.

25 cl, 5 dwg, 3 tbl, 5 ex