Polyolefin gas phase polymerization with 3-substituted c4-10-alkene

Abstract

An alkene interpolymer is prepared by polymerizing at least one 3-substituted C 4-10 alkene and at least one C 2-8 alkene in a gas phase polymerization using a Ziegler Natta polymerization catalyst system.

1 . A process for the preparation of an alkene interpolymer, comprising:
 polymerizing at least one 3-substituted C 4-10  alkene and at least one C 2-8  alkene in a gas phase polymerization using a Ziegler Natta polymerization catalyst system.   
     
     
         2 . The process as claimed in  claim 1 , wherein said catalyst system is in particulate form. 
     
     
         3 - 5 . (canceled) 
     
     
         6 . The process as claimed in  claim 1 , wherein said C 2-8  alkene is ethylene or propylene. 
     
     
         7 . The process 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. 
       
     
     
         8 . The process as claimed in  claim 1 , wherein said 3-substituted C 4-10  alkene is 3-methyl-1-butene. 
     
     
         9 . The process as claimed in  claim 1 , wherein said process is continuous. 
     
     
         10 . The process as claimed in  claim 1 , wherein a total productivity of the catalyst system is at least 1000 g polymer per g solid catalyst. 
     
     
         11 . The process as claimed in  claim 1 , wherein said alkene 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. 
     
     
         12 . The process as claimed in  claim 1 , wherein said alkene interpolymer comprises C 2-8  alkene monomer in an amount of at least 60 wt % based on the total weight of the interpolymer. 
     
     
         13 . The process as claimed in  claim 1 , wherein said alkene interpolymer comprises two C 2-8  alkene monomers and at least one 3-substituted C 4-10  alkene monomer. 
     
     
         14 . The process as claimed in  claim 1 , wherein said alkene interpolymer has a MFR 21  of greater than 0.01 g/10 min. 
     
     
         15 . The process as claimed in  claim 1 , wherein said alkene interpolymer is unimodal. 
     
     
         16 . The process as claimed in  claim 1 , wherein said process is carried out in condensed or supercondensed mode. 
     
     
         17 . The process as claimed in  claim 1 , wherein said alkene interpolymer comprises less than 1200 ppm by weight of ash. 
     
     
         18 . The process as claimed in  claim 1 , wherein said polymerization is carried out in a concentration of C 3-8  alkane of lower than 10 mol %. 
     
     
         19 . The process as claimed 1, wherein said 3-substituted C 4-10  alkene constitutes more than 5 wt % of a liquid that is continuously fed to a gas phase polymerization reactor.