Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Reexamination Certificate
2005-04-26
2005-04-26
Lu, Caixia (Department: 1713)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
C502S158000, C526S128000, C526S160000, C526S165000, C526S129000, C526S943000
Reexamination Certificate
active
06884749
ABSTRACT:
Olefin polymerization in the presence of heterogeneous supported catalysts is improved by incorporating into the supported catalyst a unifunctional hydrophobic tether comprising a hydrophobic portion containing no basic nitrogen and a univalent reactive group. The unifunctional hydrophobic tether reduces fouling and sheeting in gas phase polymerization processes and improves polymer morphology and bulk density in slurry polymerization processes, while substantially maintaining or enhancing catalyst polymerization activity.
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Gupte Kiran
Johnson Kenneth W.
Nagy Sandor M.
Neal-Hawkins Karen L.
Sartain William J.
Equistar Chemicals L.P.
Lu Caixia
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