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Process for preparing cycloolefin copolymers

  • US 5,698,645 A
  • Filed: 02/07/1997
  • Issued: 12/16/1997
  • Est. Priority Date: 06/24/1994
  • Status: Expired due to Term
First Claim
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1. A process for preparing a cycloolefin copolymer containing no crystalline ethylene sequences by polymerization of at least one cycloolefin and at least one acyclic olefin in the presence of a catalyst comprising at least one cocatalyst and at least one metallocene of the formula (I) ##STR11## where M is Zr, R1 and R2 are identical or different and are each a halogen atom, R3 and R4 are identical and are each a cyclopentadlenyl or substituted cyclopentadienyl, indenyl or substituted indenyl,and R5 and R6 are identical or different and are each a methyl group on phenyl group and where the metallocene of the formula (I) is in the form of its racemate.

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