Process for producing polyolefin elastomer employing a metallocene catalyst
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United States of America Patent
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May 9, 2000
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N/A
app pub date -
Dec 15, 1997
filing date -
Apr 10, 1996
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Abstract
A liquid phase polymerization process is provided for producing a polyolefin elastomer, e.g., one derived from ethylene, another .alpha.-olefin such as propylene and, optionally, a diene, employing a metallocene catalyst. The process comprises contacting monomer under liquid phase polymerization conditions with a catalyst composition obtained by combining (a) a metallocene procatalyst, preferably one containing a bridging group possessing at least two bulky groups, and (b) a cocatalyst such as aluminoxane, preferably a cation-generating cocatalyst, in partial on total replacement of aluminoxane.
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