Pe mib film zn/cr

Abstract

A film containing an interpolymer of ethylene and a 3-substituted C 4-10 alkene is prepared using a catalyst system comprising a Ziegler Natta or chromium oxide catalyst.

1 . A film comprising an interpolymer of ethylene and a 3-substituted C 4-10  alkene, wherein said interpolymer is made using a catalyst system comprising a Ziegler Natta or chromium oxide catalyst. 
     
     
         2 . A film as claimed in  claim 1 , wherein said 3-substituted C 4-10  alkene is a compound of formula (I) 
       
         
           
           
               
               
           
         
         wherein R 1  is a substituted or unsubstituted, preferably unsubstituted, C 1-6  alkyl group and n is an integer between 0 and 6. 
       
     
     
         3 . A film as claimed in  claim 1 , wherein said 3-substituted C 4-10  alkene is 3-methyl-1-butene. 
     
     
         4 . A film as claimed in  claim 1 , wherein said catalyst system is in particulate form. 
     
     
         5 . A film as claimed in  claim 1 , wherein said catalyst system comprises a Ziegler Natta catalyst. 
     
     
         6 . A film as claimed in  claim 1 , wherein said interpolymer comprises 3-substituted C 4-10  alkene comonomer in an amount of 0.01-40 wt % based on the total weight of the interpolymer. 
     
     
         7 . A film as claimed in  claim 1 , wherein said interpolymer comprises ethylene in an amount of at least 60 wt % based on the total weight of the interpolymer. 
     
     
         8 . A film as claimed in  claim 1 , wherein said interpolymer comprises two types of C 2-8  alkene monomers and at least one 3-substituted C 4-10  alkene monomer. 
     
     
         9 . A film as claimed in  claim 1 , wherein said alkene interpolymer has a Mw of 20 000 to 900 000. 
     
     
         10 . A film as claimed in  claim 1 , wherein said alkene interpolymer has a MFR 2  of 0.01-5000. 
     
     
         11 . A film as claimed in  claim 1 , wherein said alkene interpolymer is unimodal. 
     
     
         12 . A film as claimed in  claim 1 , further comprising another polyethylene. 
     
     
         13 . A film as claimed in  claim 1 , further comprising antioxidant. 
     
     
         14 . A film as claimed in any one of  claim 1  which is a blown film or multilayer film or an industrial film. 
     
     
         15 . A process for the preparation of a film as claimed in  claim 1  comprising blowing an interpolymer of ethylene and a 3-substituted C 4-10  alkene as defined in  claim 1 . 
     
     
         16 . A laminate or an article or a packaging, comprising a film as claimed in  claim 1 . 
     
     
         17 . The film as claimed in  claim 1 , wherein said interpolymer is prepared using a catalyst system comprising a chromium oxide catalyst.