Patent ID: 6297333
Filing Date: 2001-10-02
Classification: C07F,C08F,Y10S

Abstract:
A process for preparing an olefin polymer, comprising homopolymerizing an olefin or copolymerizing two or more kinds of olefins in the presence of an olefin polymerization catalyst selected from the group consisting of(1) an olefin polymerization catalyst comprising:(A-1) a Group IVB transition metal compound represented by the following formula (I),(B) (B-1) an organoaluminum oxy-compound, and/or(B-2) a compound which reacts with the transition metal compound (A-1) to form an ion pair, and, optionally,(C) an organoaluminum compound;(2) an olefin polymerization catalyst comprising:a fine particle carrier,(A-1) a Group IVB transition metal compound represented by the following formula (I),(B) (B-1) an organoaluminum oxy-compound, and/or(B-2) a compound which reacts with the transition metal compound (A-1) to form an ion pair and, optionally,(C) an organoaluminum compound; and(3) an olefin polymerization catalyst formed by prepolymerizing an olefin onto: a solid catalyst component which comprises:(A-1) a Group IVB transition metal compound represented by the following formula (I), and(B) (B-1) an organoaluminum oxy-compound, and/or(B-2) a compound which reacts with the transition metal compound (A-1) to form an ion pair, said components (A-1) and (B) being supported on a fine particle carrier, and, optionally,(C) an organoaluminum compound; ##STR15##wherein M is a transition metal atom of Group IVB of the periodic table,R.sup.1 's may be the same or different, and, are selected from the group consisting of hydrogen atom, halogen atom, and alkyl group of 1 to 10 carbon atoms, and at least two adjacent R.sup.1 groups form an aromatic ring or an aliphatic ring together with carbon atoms to which said at least two R.sup.1 groups are bonded, said rings formed by said R.sup.1 groups having 4 to 20 carbon atoms, as a whole;R.sup.2 's may be the same or different, and are selected from the group consisting of hydrogen atom, halogen atom, alkyl group of 1 to 10 carbon atoms, aryl group of 6 to 20 carbon atoms, alkenyl group of 2 to 10 carbon atoms, arylalkyl group of 7 to 40 carbon atoms, arylalkenyl group of 8 to 40 carbon atoms, alkylaryl group of 7 to 40 carbon atoms, silicon-containing group, oxygen-containing group, sulfur-containing group, nitrogen-containing group and phosphorus-containing group;at least one of R.sup.3 and R.sup.4 is a methyl group and the other is selected from the group consisting of hydrogen atom, halogen atom, alkyl group of 1 to 10 carbon atoms, aryl group of 6 to 20 carbon atoms, alkenyl group of 2 to 10 carbon atoms, arylalkyl group of 7 to 40 carbon atoms, arylalkenyl group of 8 to 40 carbon atoms, alkylaryl group of 7 to 40 carbon atoms, silicon-containing group, oxygen-containing group, sulfur-containing group, nitrogen-containing group and phosphorus-containing group;X.sup.1 and X.sup.2 may be the same as or different from each other and are selected from the group consisting of hydrogen atom, halogen atom, hydrocarbon group of 1 to 20 carbon atoms, halogenated hydrocarbon group of 1 to 20 carbon atoms, oxygen-containing group, and sulfur-containing group; andY represents divalent hydrocarbon group of 1 to 20 carbon atoms, divalent halogenated hydrocarbon group of 1 to 20 carbon atoms, divalent silicon-containing group, divalent germanium-containing group, divalent tin-containing group, --O--, --CO--, --S--, --SO--, --SO.sub.2 --, --NR.sup.5 --, --P(R.sup.5)--, --P(O)(R.sup.5)--, --BR.sup.5 -- or --AlR.sup.5 --, wherein, R.sup.5 is a hydrogen atom, a halogen atom, a hydrocarbon group of 1 to 20 carbon atoms or a halogenated hydrocarbon group of 1 to 20 carbon atoms.