Activator solid support for metallocene catalysts in the polymerization of olefins, a process for preparing such a support, and the corresponding catalytic system and polymerization process
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United States of America Patent
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-
Aug 24, 2004
Issued Date -
N/A
app pub date -
Apr 1, 2003
filing date -
Oct 2, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Activator solid support for metallocenes as catalysts in the polymerization of olefins, characterized in that it consists of a group of support particles for a solid catalytic component, which are formed from at least one porous mineral oxide, the said particles having been modified in order to carry, on the surface, aluminum and/or magnesium Lewis-acid sites of formula: ##STR1## groups coming from a functionalization agent having reacted with --OH radicals carried by the base particles of the support, the functionalization reaction having been followed by a fluorination reaction. The catalytic system according to the invention comprises (a) a metallocene catalyst, which has, if required, been subjected to a prealkylation treatment; (b) a cocatalyst; and (c) an activator solid support for metallocene, as defined above, it being possible for the cocatalyst (b) to be absent if the metallocene catalyst (a) has been prealkylated.
First Claim
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- C08F Class
- 7.19 % this patent is cited more than
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