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Process for preparation and purification of material of a cycloolefin copolymer

  • US 5,498,677 A
  • Filed: 02/14/1994
  • Issued: 03/12/1996
  • Est. Priority Date: 02/12/1993
  • Status: Expired due to Fees
First Claim
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1. A process for the preparation of a cycloolefin copolymer comprising the step of polymerization, without ring opening, of 0.1 to 100% by weight, based on the total amount of monomers, of at least one cycloolefin monomer of the formulae I, II, III, IV, V, or VI ##STR6## in which R1, R2, R3, R4, R5, R6, R7 and R8 are identical or different and are a hydrogen atom or a C1 C8 -alkyl radical, it being possible for the same radicals in the various formulae to have a different meaning,0to 99.9% by weight, based on the total amount of monomers, of a cycloolefin of the formula VII ##STR7##

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