Appeal No. 95-1959
Application 07/894,128
THE INVENTION
Appellants' claimed invention is directed to
catalyst systems (claims 1 through 3, 6 and 7) and to a
process for preparing a catalyst system (claim 8). The
catalyst system comprises a Group IV or Group V metal complex
and an oligomeric alumoxane compound applied to a finely
divided polypropylene support. Useful metals include
titanium, zirconium, hafnium, vanadium, niobium and tantalum.
The method of preparing the catalyst system comprises mixing
the metal complex and the alumoxan oligomer to form a mixture
and thereafter applying the resulting mixture to finely
divided polypropylene. The catalyst system is useful for the
polymerization of C -C 1-alkenes.
2 10
Claim 1 is adequately representative of the appealed
subject matter and is reproduced below for a more facile
understanding of appellants' invention.
1. A catalyst system suitable for the polymerization
of C -C -alk-1-enes comprising, as active
2 10
ingredients, a complex compound of metals in Sub-
groups IV and V of the Periodic Table and an
oligomeric alumoxan (sic) compound and obtained by a
procedure in which metals in Sub-groups IV and V of
the Periodic table are mixed with the oligomeric
alumoxan (sic) compound and the resulting mixture is
then applied to finely divided polypropylene.
2
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