To provide a catalyst which satisfies both high polymerization activity and high copolymerization ability in the copolymerization of an α-olefin and a cycloolefin, and can easily be synthesized.
A 2-20C α-olefin and a cycloolefin are copolymerized using a cycloolefin copolymerization catalyst consisting of a transition metal compound represented by the general formula: CpMLmX3-m×E (wherein Cp is a group having a cyclopentadienyl skeleton; M is Ti, Zr or Hf; X is a hydrocarbon group which may be substituted with a halogen, an oxygen-containing group, a hydrogen atom or a halogen atom; and E is a neutral compound molecule which is added to a complex by a coordinate bond), and one or more activators selected from organic aluminum oxy compounds or organic boron compounds.
SHIRAI HIROSHI
Masami Sakai
Jun Komatsu
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