Patent ID: 7172988

Claim:
A catalyst component for ethylene polymerization, consisting of a reaction product of an inorganic oxide support, and at least one alkyl metal compound, at least one halide, at least one dihydrocarbyl magnesium compound, at least one difuntional compound that reacts with the dihydrocarbyl magnesium compound and at least one titanium compound, which are supported on the support, wherein (1) the alkyl metal compound is represented by formula (I): Mâ€²R 1 R 2 R 3 (I) wherein R 1 , R 2 and R 3 , which are identical or different, are C 1 â€“C 20 alkyl, Mâ€² is a metal Group 13 of the Periodic Table; (2) the halide is a C 1 â€“C 20 alkyl halide, or a compound represented by formula (II) MX n , in which M is an element of Group 3, 4, 5, 13, 14 or 15 of the Periodic Table, X is F, Cl or Br, and n=3, 4 or 5; and (3) the difunctional compound is a mono-, di- or multi-halogenated alcohol or phenol having from 2 to 20 carbon atoms; or a mono-, di- or multi-halogenated acyl halide having from 2 to 20 carbon atoms.