Appeal No. 95-1959
Application 07/894,128
alkoxy or hydrogen and "n" is a positive number of 3 or less
(column 4, lines 25 through 35).
Welborn discloses a new, improved catalyst useful
for polymerization of olefins. The catalyst is a
heterogeneous transition metal containing supported catalysts
which may be used without the use of a cocatalyst (column 1,
lines 8 through 20). Specifically, a new metallocene/alumoxane
catalyst is provided for olefin polymerization useful for the
polymerization of polyethylenes and copolymers of alphaolefins
having from 3 up to 18 or more carbon atoms (column 2, lines
32 through 38). In one embodiment, the catalyst comprises the
reaction product of at least one metallocene and an alumoxane
in the presence of a support material thereby providing a
supported metallocene/ alumoxane reaction product as the
catalyst (column 2, lines 39 through 44). The metallocenes
are organometallic coordination compounds which are
cyclopentadienyl derivatives of a Group 4b, 5b or 6b metal of
the Periodic Table and include metallocenes of titanium,
zirconium, hafnium and vanadium. The alumoxanes are the
reaction products of aluminum trialkyl with water. Useful
supports include any of the solid, particularly porous
supports such as talc, inorganic oxides and resinous supports
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