Catalyst systems and processes for using the same

Abstract

A catalyst system including two or more metallocene catalysts and processes for using the same to produce polyolefin polymer compositions are provided. The polyolefin polymer compositions have a good balance of a melt index ratio and normalized melt strength.

1 .- 18 . (canceled) 
     
     
         19 . A polyethylene composition made from the polymerization process of claim  15  and comprising at least at least 65 wt % ethylene derived units based upon the total weight of the polyethylene composition, wherein the polyethylene composition has a density of from 0.890 g/cm 3  to 0.950 g/cm 3 , a melt index (I 2 ) of from 0.1 g/10 min to 10 g/10 min, a melt index ratio (I 21 /I 2 ) of 30 or greater, and normalized melt strength (nMS) 7.0 cN or greater. 
     
     
         20 . The polyethylene composition of  claim 19 , wherein the polyethylene composition has a density of from 0.910 g/cm 3  to 0.940 g/cm 3 . 
     
     
         21 . The polyethylene composition of  claim 19 , wherein the polyethylene composition has a melt index of from 0.50 g/10 min to 7 g/10 min. 
     
     
         22 . The polyethylene composition of  claim 19 , wherein the polyethylene composition has a melt index ratio (I 21 /I 2 ) of 35 or greater. 
     
     
         23 . The polyethylene composition of  claim 19 , wherein the polyethylene composition has a melt index ratio (I 21 /I 2 ) of 40 or greater. 
     
     
         24 . The polyethylene composition of  claim 19 , wherein the polyethylene composition has a normalized melt strength (nMS) of 7.2 cN or greater. 
     
     
         25 . The polyethylene composition of  claim 19 , wherein the polyethylene composition has a normalized melt strength (nMS) of 7.5 cN or greater.