The subject matter on appeal is represented by the following
claim 1:
1. A solid component of a catalyst for the (co)polymerization of
ethylene and "-olefins, which contains magnesium-carboxylate
bonds and transition metal-carboxylate bonds; which is
represented by the formula
M1Mg(0.3-20)X(2-60)A1(0-6)(R-C00)(0.1-3) (I);
and which is prepared by the steps of:
(a) forming a solution, in an inert organic solvent, of a
magnesium carboxylate or a magnesium carboxylate halogenide having
the formula MgXn(R-C00)2-n (II), where n ranges from 0 to 1, and at
least one transition metal carboxylate or transition metal
carboxylate halogenide having the formula MXm(R-C00)4-m (III), where
the atomic ratio between the magnesium in (II) and the transition
metal in (III) is from 0.3:1 to 20:1;
(b) adding to the solution an aluminum alkyl halide (IV),
where the alkyl group is a linear or branched alkyl group
containing 1-20 carbon atoms and the halide group is a halide other
than an iodide group, to precipitate the solid component of the
catalyst, where the atomic ratio between the halide in (IV) and the
total carboxyl groups in (II) and (III) is from 0.3:1 to 10:1; and
(c) recovering the solid component in a granular form;
where
M in formulas (I) and (III) is at least one transition metal
selected from the group consisting of titanium, vanadium,
zirconium, and hafnium;
X in formulas (I), (II), (III), and (IV) is halogen other than
iodine;
R in formulas (I), (II), and (III) is an aliphatic,
cycloaliphatic, or aromatic radical containing at least 4 carbon
atoms; and
m is from 0 to 2.
No prior art references are relied upon by the examiner.
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Last modified: November 3, 2007