Vinylaromatic polymers having high melt flow
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United States of America Patent
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Mar 15, 2005
Grant Date -
Jan 13, 2005
app pub date -
Jun 15, 2004
filing date -
Jan 22, 2002
priority date (Note) -
Expired
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Abstract
A process for preparing syndiotactic polymers of vinylaromatic monomers having improved melt flowability comprising contacting one or more vinylaromatic monomers with a catalyst system comprising a titanium coordination complex capable of preparing syndiotactic vinylaromatic polymers under addition polymerization conditions in the presence of hydrogen gas at a hydrogen partial pressure from 0.1 to less than 10 kPa.
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