Racemoselective synthesis of ansa-metallocene compounds, ansa-metallocene compounds, catalysts comprising them, process for producing an olefin polymer by use of the catalysts, and olefin homo- and copolymers
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United States of America Patent
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May 1, 2012
Grant Date -
Oct 14, 2010
app pub date -
Oct 25, 2007
filing date -
Oct 25, 2007
priority date (Note) -
Expired
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Abstract
A metallocene compound with the 4- and 7-positions on the indenyl moiety possessing large aromatic substituents is prepared in accordance with a method which produces substantially 100 percent racemic isomer. Advantageously, polymerization catalysts including the metallocene of the invention provide superior olefin polymerization results.
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