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Abstract

A catalyst composition, suitable for polymerization of low-density and high-molecular weight polyolefin, comprising unsymmetrical unabridged metallocene compound and an aluminoxane is disclosed, wherein the metallocene compound and the aluminoxane are uniformly deposited on a porous support by using an oscillatory wave having the frequency of 20 to 500 kHz, and the activity of the catalyst composition increases when hydrogen is introduced in the polymerization of olefin. The catalyst composition includes a metallocene compound represented by (R.sup.1CpR.sup.2)(Cp'R.sup.3)MX.sub.2 for polymerization of olefin, and an aluminoxane, wherein Cp is a cyclopentadienyl radical; Cp' is a radical having a cyclopentadienyl moiety; R.sup.1 is a radical selected from cyclohydrocarbyl radicals having 3 to 11 carbon atoms; R.sup.2 and R.sup.3 are one or more substituents substituted on Cp and Cp', respectively; M is a transition metal of Group 4B, 5B, or 6B of the Periodic Table; and X can be the same or different, and is a radical selected from halogen, alkyl, aryl, alkenyl, alkylaryl, arylalkyl, alkoxy, and aryloxy radical having 1 to 20 carbon atoms, and the metallocene compound and the aluminoxane are deposited on porous support.

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First Claim