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Mixed catalysts and their use in a polymerization process

  • US 6,207,606 B1
  • Filed: 05/15/1998
  • Issued: 03/27/2001
  • Est. Priority Date: 05/15/1998
  • Status: Expired due to Term
First Claim
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1. A mixed catalyst comprising a metallocene catalyst activator and at least with two different metallocenes, two bulky ligands on each metallocene being bridged to each other, and wherein the at least two metallocenes each comprise a transition metal, which is the same or different, from Group 3 to 7 or a metal of the Lanthanide or Actinide Series of the Periodic Table of Elements, wherein at least one metallocene comprises at least two bridged bulky ligands, the number of non-hydrogen substituents, said substituent beings the same or different on each of the bulky ligands, being from 0 to 4, said number being the same;

  • the number of substituents on each of the bulky ligands of the at least one other metallocene being different, the bulky ligands are the same and the substituents are the same or different.

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