Preparation of ultra high molecular weight linear low density polyethylene

Abstract

Disclosed is a method of preparing an ultra-high molecular weight, linear low density polyethylene with a catalyst system that comprises a bridged indenoindolyl transition metal complex, a non-bridged indenoindolyl transition metal complex, an alumoxane activator and a boron-containing activator. The ultra-high molecular weight, linear low density polyethylene has a weight average molecular weight greater than 1,000,000 and a density less than 0.940 g/cm 3 .

1 - 5 . (canceled) 
     
     
         6 . An ultra-high molecular weight, linear low density polyethylene, said polyethylene comprising recurring units of ethylene and a C 3  to C 10  α-olefin and having a weight average molecular weight greater than 1,000,000 and a density less than 0.940 g/cm 3 . 
     
     
         7 . The polyethylene of  claim 6 , wherein the weight average molecular weight is greater than or equal to 1,500,000 and the density is less than or equal to 0.930 g/cm 3 . 
     
     
         8 . The polyethylene of  claim 6 , wherein the weight average molecular weight is greater than or equal to 2,000,000 and the density is less than or equal to 0.925 g/cm 3 . 
     
     
         9 . The polyethylene of  claim 6 , wherein the weight average molecular weight is greater than or equal to 2,500,000 and the density is less than or equal to 0.900 g/cm 3 . 
     
     
         10 . The polyethylene of  claim 6 , which has a molecular weight distribution less than or equal to 5. 
     
     
         11 . The polyethylene of  claim 6 , which has a molecular weight distribution less than or equal to 2.5. 
     
     
         12 - 16 . (canceled)