PRE-POLYMERIZED CATALYST COMPONENTS FOR THE POLYMERIZATION OF OLEFINS
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United States of America Patent
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Issued Date -
Jul 4, 2024
app pub date -
Mar 24, 2022
filing date -
Apr 6, 2021
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Abstract
A pre-polymerized catalyst component for the polymerization of olefins made from or containing (a) a solid catalyst component made from or containing Ti, Mg, and a halogen and optionally, a bidentate electron donor compound (BE) in an amount such that the molar ratio (BE)/Ti ranges from 0 to 0.3, and (b) an ethylene (co)polymer in an amount ranging from 0.1 g up to less than 30 g per g of the solid catalyst component, and having an intrinsic viscosity, measured in tetraline at 135° C., of at least 3.0 dL/g, wherein the pre-polymerized catalyst component has a porosity measured by mercury method in the range 0.1 to 1 cm3/g.
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