1,2-phenylene bridged 1-indenyl-2-indenyl metallocene complexes for olefin polymerisation

Abstract

The invention relates to a metallocene complexes according to formula (I), (I) wherein R 1 and R 2 are independently selected from H, an alkyl or an aryl group, wherein R 3 is a C1-C10 alkyl group, wherein R′ is selected from H, an alkyl group, an aryl group and wherein different R′ substituents can be connected to form a ring structure and wherein B is a 1,2 phenylene bridging moiety, which can be optionally substituted, wherein Mt is selected from Ti, Zr and Hf, X is an anionic ligand, z is the number of X groups and equals the valence of Mt minus 2. The invention also relates to a catalyst comprising the reaction product of the metallocene complex and a cocatalyst. Further the invention relates to a (co)polymerisation process of olefinic monomers.

1 . Metallocene complex according to formula I, 
       
         
           
           
               
               
           
         
       
       wherein R 1  and R 2  are independently selected from H, an alkyl or an aryl group, wherein R 3  is a C1-C10 alkyl group, wherein R′ is selected from H, an alkyl group, an aryl group and wherein different R′ substituents are optionally connected to form a ring structure,
 and wherein B is a 1,2 phenylene bridging moiety, which is optionally substituted, wherein Mt is selected from Ti, Zr and Hf, X is an anionic ligand, z is the number of X groups and equals the valence of Mt minus 2. 
 
     
     
         2 . The metallocene complex according to  claim 1 , wherein Mt is zirconium or hafnium. 
     
     
         3 . The metallocene complex according to  claim 1 , wherein X is a methyl group, Cl, Br or I. 
     
     
         4 . The metallocene complex according to  claim 1 , wherein R 1  and R 2  are chosen from H, methyl or phenyl groups. 
     
     
         5 . The metallocene complex according to  claim 1 , wherein R 3  is chosen from a methyl or isopropyl group. 
     
     
         6 . The metallocene complex according to  claim 5 , wherein bridge B is a 1,2 phenylene bridge. 
     
     
         7 . A catalyst comprising the metallocene complex according to  claim 1  and a cocatalyst. 
     
     
         8 . The catalyst according to  claim 7 , wherein the cocatalyst includes aluminium- or boron-containing cocatalysts. 
     
     
         9 . Process for the preparation of olefin polymers by polymerising one or more olefins in the presence of a cocatalyst and the metallocene complex according to anyone of  claims 1 - 6 , wherein the metallocene complex optionally is immobilized on a support. 
     
     
         10 . Polyolefin produced using the catalyst of  claim 7 . 
     
     
         11 . Polyolefin according to  claim 10 , wherein the polyolefin is a copolymer of ethylene and one of more of 1-butene, 1-hexene, 1-octene, vinyl-cyclohexane or 4-methyl-1-pentene. 
     
     
         12 . Polyolefin according to  claim 11  wherein the polyolefin is a linear low-density polyethylene (LLDPE) having melt mass flow rate as determined using ASTM D1238-10 at 190° C./2.16 kg in the range of from 0.5 to 125 g/10 min and a density in the range of from 900 kg/m 3  to less than 940 kg/m 3  as determined using ASTM D1505-10. 
     
     
         13 . Articles comprising the polyolefins obtainable by the process according to  claim 9 . 
     
     
         14 . The metallocene complex according to  claim 1 , wherein Mt is zirconium. 
     
     
         15 . The metallocene complex according to  claim 1 , wherein X is a methyl group or Cl. 
     
     
         16 . The catalyst according to  claim 7 , wherein the cocatalyst includes aluminoxanes.