Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2003-08-14
2008-11-18
Jagannathan, Vasu (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S170000, C526S161000, C526S172000, C526S134000, C526S129000, C526S130000, C526S348000, C526S348500, C526S348600, C526S348200, C526S351000, C526S352000, C526S943000, C526S901000, C502S118000
Reexamination Certificate
active
07452948
ABSTRACT:
An improved method for the preparation of a supported polymerisation catalyst system comprises the combination of (i) a porous support (ii) a polymerisable monomer, (iii) a polymerisation catalyst, and (iv) a cocatalyst, characterised in that the polymerisable monomer is added to the porous support before addition of one or both of the polymerisation catalyst and the cocatalyst. The preferred polymerisation catalyst is a metallocene complex and the preferred porous support is silica. The resultant supported catalysts are stable over long periods of time. The supported catalyst are particularly suitable for use in the gas phase.
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Jacobsen Grant Berent
Kimberley Brian Stephen
Mastroianni Sergio
Taylor Michael John
Finnegan, Henderson Farabow, Garrett and Dunner L.L.P.
Ineos Europe Limited
Jagannathan Vasu
Lee Rip A.
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