Patent ID: 6627714
Filing Date: 2003-09-30
Classification: C08F,Y10S

Abstract:
A method for producing an olefinic copolymer, comprising:copolymerizing a) ethylene (M1) and b) dicyclopentadiene or tricyclopentadiene (M2), and, optionally c) a cyclic olefin (M3), in the presence of a catalyst which comprises a metallocene compound (A) of the following formula [1]: H2C(Râ€²mCp)(Râ€³nCp)MX2â€ƒâ€ƒ[1]wherein M is zirconium or hafnium, Cp is a group having a cyclopentadienyl skeleton, each of Râ€² and Râ€³ is a hydrocarbon group having 1 to 10 carbon atoms, each of two X's which may be the same or different from each other, is a halogen atom, a hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a halogenated hydrocarbon group, an alkylamino group, an alkoxy group, an aryloxy group of the formula â€”Oâ€”Arâ€”Yp, a thioalkyl group, or a thioaryl group of the formula â€”Sâ€”Arâ€”Yp; wherein in â€”Oâ€”Arâ€”Yp and in â€”Sâ€”Arâ€”Yp, Ar is an aromatic ring, Y is a halogen atom, a hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a halogenated hydrocarbon group, an alkoxy group, an alkylamino group, a cyano group or a nitro group, and p is an integer of from 1 to 5, and each of m and n is an integer of from 0 to 4, provided that m and n are not equal, and m+n is an integer of from 3 to 6, and an aluminoxane (B), is used; wherein said olefin copolymer has a cyclic structure.