Catalyst for alpha-olefin polymerization and production of poly-alpha-olefin therewith

Claim 1

A method for polymerizing an α-olefin characterized by bringing the α-olefin into contact with a catalyst which is obtained by reacting a halogenated metallocene compound with an organometallic compound, and then bringing the resultant reaction product into contact with an ionic compound or an electrophilic compound; wherein the halogenated metallocene compound is a compound represented by the formula (I) or (II) (wherein A and B or A' and B' are mutually identical or different and are unsaturated hydrocarbon residues coordinated to a central atom; R is a divalent straight-chain hydrocarbon residue which may have a side chain, or a residue in which a part or all of the carbon atoms of the straight-chain may be substituted by silicon atoms, germanium atoms or tin atoms; X is a halogen atom; and M is a titanium atom, a zirconium atom or a hafnium atom); the organometallic compound is triethylaluminum, tripropylaluminum, triisopropylaluminum, tributylaluminum, triisobutylaluminum, tripentylaluminum, trimethylaluminum, triheptylaluminum, trioctylaluminum, tridecylaluminum, isoprenylaluminum, diethylaluminum hydride, diisopropylaluminum hydride, diisobutylaluminum hydride, diethylzinc, diphenylzinc, divinylzinc, dimethylmagnesium, diethylmagnesium, dibutylmagnesium, dihexylmagnesium or butylethylmagnesium; the ioniccompound is represented by the formula (V) [Q] m [Y] m (wherein Q is a cationic component of the ionic compound, and is selected from carbonium cation, tropylium cation, ammonium cation, oxonium cation, sulfonium cation and phosphonium cation, silver ion, gold ion, platinium ion, copper ion, palladium ion, mercury ion and ferrocenium ion, and Y is an anionic component of the ionic compound selected from the anionic components of an ionic organoboron, organoaluminum, organogallium, organophosphorus, organoarsenic and organoantimony); and the electrophilic compound comprises magnesium halides or inorganic oxides.