Component and catalysts for the polymerization of olefins
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United States of America Patent
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Jun 22, 1993
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Nov 16, 1992
filing date -
Apr 28, 1989
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Abstract
Spherical catalyst components for the polymerization of olefins comprising a titanium compound and optionally an electron-donor supported on anhydrous magnesium chloride, characterized by a surface area between 20 and 250 m.sup.2 /g, porosity between 0.25 and 0.5 cc/g, and an X-ray spectrum where the magnesium chloride reflections are present at 2 .nu. of 35.degree. and 14.95.degree., or where the reflection at 35.degree. is substituted by a halo with the maximum intensity between 33.5.degree. and 35.degree. and the reflection of 2 .nu. at 14.95.degree. is absent.
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