Patent ID: 6790917
Filing Date: 2004-09-14
Classification: C08F,Y10S

Abstract:
A process for producing a polymer which comprises polymerizing a vinyl compound selected from the group consisting of 3, 3-dimethyl-1-butene and vinyl cyclohexane, in the presence of a catalyst obtained by combining:(A) a transition metal compound represented by the general formula [1]wherein M represents a transition metal; each of Cp1 and Cp2 independently an &eegr;5-indenyl group of an &eegr;5-substituted indenyl group; each of R1 and R2 independently represents a hydrogen atom or hydrocarbon group having 1 to 20 carbon atoms, and they may connect and form a ring structure through C; X represents a halogen atom, hydrocarbon group having 1 to 20 carbon atoms; and n represents a number of 2; (B) at least one aluminum compound selected from the following (B1) to (B3): (B1) an organoaluminum compound represented by the general formula E1aAlZ3âˆ’a, (B2) a cyclic aluminoxane having a structure represented by the general formula {â€”Al(E2)â€”Oâ€”}b, and (B3) a linear aluminoxane having a structure represented by the general formula E3{â€”Al(E3)â€”Oâ€”}cAlE32, (wherein E1 to E3 respectively represents a hydrocarbon group having 1 to 8 carbon atoms, and all of E1, E2 and E3 may be the same or different; Z represents a hydrogen atom or a halogen atom, and all of Z may be the same or different; a represents a numeral satisfying 0(C) at least one boron compound selected from the following (C1) to (C3): (C1) a boron compound represented by the general formula BQ1Q2Q3, (C2) a boron compound represented by the general formula G+(BQ1Q2Q3Q4)âˆ’, and (C3) a boron compound represented by the general formula (Lâ€”H) +(BQ1Q2Q3Q4)âˆ’(wherein B is a boron atom in the trivalent valence state, Q1-Q4 are a halogen atom, a hydrocarbon group, a halogenated hydrocarbon group, a substituted silyl group, an alkoxy group or a di-substituted amino group, which may be the same or different, respectively; G+ is an inorganic or organic cation, L is a neutral Lewis base, and (Lâ€”H)+ is a Br&phgr;nsted acid).