Catalysts for olefin polymerization, process for production of the catalysts, and method for preservation thereof
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United States of America Patent
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Issued Date -
Mar 12, 2009
app pub date -
Apr 27, 2006
filing date -
May 12, 2005
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Abandoned
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Abstract
Olefin polymerization catalysts for producing polyolefin resins which can dispense with a melt-kneading step necessitating great energy or a substitute addition step therefor and to which small amounts of antioxidants have been effectively added; and a process for the production of the catalysts. Specifically, a catalyst for olefin polymerization characterized by being prepared by conducting prepolymerization in the presence of [I] a solid catalyst for olefin polymerization having a mean particle diameter of 10 to 200 μm, [II] an antioxidant for resins, and [III] an olefin; and a catalyst for olefin polymerization characterized by containing [IV] an organoaluminum compound in addition to the components [I] to [III].
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