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...
C526S160000, C526S170000, C526S161000, C526S172000, C526S134000, C526S348000, C502S219000, C502S217000, C502S103000
Reexamination Certificate
active
10539518
ABSTRACT:
Supported catalyst systems are provided comprising (a) a transition metal compound, (b) a non aluminoxane activator comprising, and (c) a support material comprising an inorganic metal oxide, inorganic metal halide or polymeric material or mixtures thereof characterised in that the support material has been pretreated with an SO4containing compound. The preferred transition metal compounds are metallocenes and the SO4containing compound is typically sulphuric acid. The supported catalyst systems show improved activity and also may reduce fouling in gas phase fluidised bed processes.
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Jacobsen Grant Berent
Kimberley Brian Stephen
Lalanne-Magne Claudine Viviane
Mastroianni Sergio
Finnegan, Henderson Farabow, Garrett and Dunner L.L.P.
Innovene Europe Limited
Lee Rip A.
Wu David W.
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