Showa Denko K.k.

Satoshi Fujibe

Nobuyuki Kibino

Tsuneo Tajima

The invention relates to a catalyst for the polymerization of norbornene monomers comprising transition metal complex (A) represented by formula (1); and a method for producing a norbornene (co)polymer, especially a norbornene copolymer containing a monomer unit represented by formulae (2) and (3), wherein a norbornen monomer is homopolyzed or copolymerized in the presence of the polymerization catalyst. Preferable examples of the transition metal complex (A) include (&#x3c0;-allyl){4-(2,6-diisopropylphenylimino)-2-penten-2-olato-&#x3ba;N,O}palladium and (&#x3c0;-allyl){4-(1-naphthylimino)-2-penten-2-olato-&#x3ba;N,O}palladium. In the formulae, the symbols are as defined in the description. A norbornene (co)polymer which has excellent transparency, excellent heat resistance, excellently low water absorption and excellent electrical insulation characteristics can be efficiently produced by the present invention. 

Catalyst for norbornene monomer polymerization and method for producing norbornene polymer

A catalyst for a polymerization of norbornene monomers includes a transition metal complex represented by a formula (1). A method for producing a norbornene copolymer includes copolymerizing first norbornene monomers corresponding to a first monomer unit represented by a formula (2) and second norbornene monomers corresponding to a second monomer unit represented by a formula (3) in a presence of the catalyst. The transition metal complex is preferably (&#x3c0;-allyl) {2-[N-(2,6-diisopropylphenyl) iminomethyl]phenolate}palladium, (&#x3c0;-allyl) {2-[N-(2,6-diisopropylphenyl)iminomethyl]-4-fluorophenolate}palladium, (&#x3c0;-allyl)[2-(N-phenyliminomethyl) phenolate]palladium or (&#x3c0;-allyl){2-[N-(2,6-diisopropylphenyl) iminomethyl]-6-methylphenolate}palladium. 

Catalyst for polymerization of norbornene monomers, method for producing norbornene polymer, method for producing norbornene copolymer, norbornene polymer and transition metal complex

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Oita, Japan

Satoshi Fujibe