Metallocene-catalyzed olefin polymerization in the absence of aluminoxane
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United States of America Patent
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Sep 19, 2000
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May 25, 1995
filing date -
Jul 24, 1990
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Abstract
The present invention is directed to a method for polymerizing an .alpha.-olefin characterized by using a catalyst system which is obtained by reacting a halogenated metallocene compound with an organometallic compound, and then bringing the resultant reaction product into contact with a compound which will be a stable anion by reaction with the reaction product of the halogenated metallocene compound and the organometallic compound. When the method of the present invention is carried out, a polyolefin can be obtained by the use of the inexpensive catalyst in a high activity per unit amount of the catalyst.
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