Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-09-25
2007-09-25
Wu, David W. (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S161000, C526S134000, C526S160000, C526S170000, C526S126000, C502S103000, C502S300000, C502S084000, C502S080000
Reexamination Certificate
active
11196639
ABSTRACT:
Methods for making polyolefins are disclosed. One method comprises polymerizing an olefin in the presence of a catalyst system comprising a single-site complex, an agglomerated metal oxide/clay support-activator, and an ionic borate. Including an ionic borate with the support-activator provides an unexpected boost in catalyst activity and gives polyolefins with high molecular weight and improved comonomer incorporation. In another method of the invention, an olefin is polymerized in the presence of an indenoindolyl metal alkylated complex and an agglomerated metal oxide/clay support-activator. Use of alkylated indenoindolyl complexes with the support-activators provides improved activity compared with metal halides.
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Beran Debra L.
Mack Mark P.
Tsuie Barbara M.
Vargas Edward S.
Wang Shaotian
Equistar Chemicals LP
Lee Rip A.
Schuchardt Jonathan L.
Wu David W.
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