Ziegler-natta catalyst for olefin polymerization including aryloxy group and method for polymerization of olefin using same
The present invention relates to a Ziegler-Natta catalyst for olefin polymerization and a method for polymerization of olefin using the same. Specifically, the invention relates to a Zeigler-Natta catalyst for olefin polymerization, which is produced by a method comprising the step of reacting a transition metal compound in which the transition metal having an oxidation number of 4 or more is selected from Groups IV, V or VI of the Periodic table and two or more aryloxy ligands are bound to the transition metal, with an organomagnesium compound, to reduce said transition metal compound to a reduced form in which the transition metal has an oxidation number of 3, and a method for polymerization of olefin using said catalyst.
1. A method for preparing a Ziegler-Natta catalyst for olefin polymerization, which is produced by a method comprising a step of reacting a transition metal compound having a general formula of MX p−(q+r) (OAr 1 ) q (OAr 2 ) r , with an organomagnesium compound having a general formula of MgX 2−m R m , wherein M represents a transition metal having an oxidation number of 4 or more, selected from Groups IV, V or VI of the Periodic table; X represents a halogen atom; Ar1 and Ar2 each represents substituted or unsubstituted aryl group of 6 to 30 carbon atoms, in which the Ar1 and Ar2 are not linked to each other; p represents the oxidation number of M of 4 or more; q and r satisfy 0≦q≦p, 0≦r≦p and 2≦q+r≦p; R represents an alkyl group of 1 to 16 carbon atoms; and m satisfies 0<m≦2.
2. The method according to claim 1 , wherein the transition metal compound and the organomagnesium compound are reacted at 60˜90° C. with a molar ratio of 0.1≦the transition metal compound/the organomagnesium compound≦0.5.