Appeal No. 95-1959
Application 07/894,128
such as polyolefins (column 3, lines 41 through 45). Finely
divided polyethylene makes a useful support (column 3, lines
52 through 55). The supported catalyst is prepared by simply
mixing the reactants in a suitable solvent to the support
material slurry (column 5, lines 8 through 11). The amount of
catalyst used may vary over a wide range and the ratios
suitable for use are significantly less than that which is
necessary in a homogeneous system (column 5, lines 41 through
56). The particle size of the support effects the particle
size of the product obtained. A particle size of from 30 to
600 microns is suitable (column 8, lines 25 through 40).
Winter discloses a catalyst for copolymerizing
propylene with other olefins (column 1, lines 56 through 58).
The catalyst comprises a metallocene and an alumoxane (column
2, line 23 through column 3, line 40). The metallocene may be
preactivated by reaction with an alumoxane before the
polymerization (column 7, lines 33 through 52).
Takahashi discloses a method for the preparation of
an ethylene copolymer by the gas phase copolymerization of
ethylene and an alpha-olefin of from 3 to 10 carbon atoms in
the presence of a catalyst comprising a transition metal
complex of cyclopentadiene and alumoxane supported on a
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