Patent ID: 6492294
Filing Date: 2002-12-10
Classification: C07F,C08F,Y10S

Abstract:
The olefin polymerization catalyst prepared by a process comprising contacting a transition metal compound selected from the group consisting of transition metal compounds represented by the general formulas [I] and [II] described below: wherein M1 is a transition metal atom of the Group IV of the Periodic Table of the Elements; A is an atom of the Group XVI of the Periodic Table of the Elements; J is an atom of the Group XIV of the Periodic Table of the Elements; Cp1 is a group having a cyclopentadiene type anion skeleton; each of X1, R1, R2, R3, R4, R5 and R6 independently is a hydrogen atom, a halogen atom, an alkyl group, an aralkyl group, an aryl group, a substituted silyl group, an alkoxy group, an aralkyloxy group, an aryloxy group or a di-substituted amino group; X2 is an atom of the Group XVI of the Periodic Table of the Elements; R1, R2, R3, R4, R5 and R6 may be optionally combined with each other to form a ring; and a plural number of M1, A, J, Cp1, X1, X2, R1, R2, R3, R4, R5 and R6 may be respectively the same or different; and the following (B) and/or (C):(B) one or more organoaluminum compounds selected from (B1) to (B3) as described below: (B1) an organoaluminum compound indicated by the general formula E1AlZ3-a, (B2) a cyclic aluminoxane having a structure indicated by the general formula {â€”Al(E2)â€”Oâ€”}b, and (B3) a linear aluminoxane having a structure indicated by the general formula E3{â€”Al(E3)â€”Oâ€”}cAlE32, wherein each of E1, E2 and E3 is a hydrocarbon group, all of E1, all of E2 and all of E3 may be the same or different, Z represents a hydrogen atom or a halogen atom, all of Z may be the same or different, a represents a number satisfying an expression of 0(C) any one of boron compounds (C1) to (C3) as described below: (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 (L-H)+(BQ1Q2Q3Q4)âˆ’, wherein B is a boron atom in the trivalent valence state; Q1 to 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; they may be the same or different, G+ is an inorganic or organic cation, L is a neutral Lewis base; and (L-H)+ is a Brnsted acid.