Supported catalyst for the polymerization and copolymerization of olefinically unsaturated compounds, and a (co)polymerization process which uses it
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United States of America Patent
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Feb 23, 1993
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N/A
app pub date -
Mar 21, 1991
filing date -
Mar 26, 1990
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Abstract
A supported catalyst for the polymerization and copolymerization of olefinically unsaturated compounds is described, comprising an organometallic compound of aluminium and a second component obtained by bringing a titanium, vanadium or chromium compound, at least one compound of a second metal chosen from V, Al, Zr, Hf, Mo and Nd and optionally a magnesium compound into contact with a porous support consisting of microbeads of aerogels of one or more inorganic oxides distinguished by low density, high porosity and the fact that at least 90% of the pores have a diameter lying within a very narrow range of values. The process for the polymerization or copolymerization of olefinically unsaturated compounds based on the use of said catalyst is also described.
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