Metallocene catalysts and their use in polymerization processes

Metallocene catalysts and their use in polymerization processes

  • CN 101,842,158 A
  • Filed: 10/09/2008
  • Published: 09/22/2010
  • Est. Priority Date: 10/22/2007
  • Status: Active Grant
First Claim
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1. catalyst system, it comprises LBZrQ2 and carrier by the ring-type bridge metallocenes LA of activator activation (R '"'"' SiR '"'"'), and described activator comprises aikyiaiurnirsoxan beta, modified alumoxane or their mixture, wherein:

  • LA and LB are with the Zr bonding and by the unsubstituted of formula (C5H4-dRd) definition or the cyclopentadienyl ligands that replaces independently, wherein R be the hydrocarbyl substituent of hydrogen, hydrocarbyl substituent, replacement or hetero atom substituents and wherein d be 0,1,2,3 or 4;

    LA and LB interconnect with ring-type silicon bridge R '"'"' SiR '"'"', and wherein R '"'"' is the hydrocarbyl substituent of hydrocarbyl substituent or replacement independently, and described substituting group is connected with each other to form the sila ring;

    WithEach Q is the hydrocarbyl ligand of unsettled alkyl or replacement.

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