Appeal No. 95-1959
Application 07/894,128
36). The main requirement for the substance used as a carrier
is that it is insoluble or sparingly soluble in the
polymerization medium and will not strongly inactivate the
catalyst component (column 2, lines 36 through 41). Particle
size for the carrier ranges from 1 to 1,000 microns (column 2,
lines 41 through 43). The main catalyst component to be
supported must remain insoluble in the polymerization medium
during polymerization and may comprise the well known catalyst
system for polymerizing olefins comprising a compound of
Groups IV through VI of the Periodic Table and an
organometallic compound of a metal of Groups I to III (column
2, lines 54 through 64). The proportion of main catalyst
component supported on the carrier is 50% by weight or less,
preferably 0.5 to 30 % by weight or less (column 3, lines 26
through 30). The particle size of the polyolefin formed in
the polymerization reaction may be controlled by controlling
the particle size of the carrier (column 3, lines 65 through
68). Olefins which may be prepared by polymerization with the
catalyst system include polypropylene (column 4, lines 20
through 23). Useful organometallic compounds include aluminum
compounds represented by the formula R AlX wherein "R" is a
n 3-n
hydrocarbon of from 1 to 8 carbon atoms, "X" is halogen,
4
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