Process for the in-situ preparation of single-site transition metal catalysts and polymerization process
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United States of America Patent
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Sep 14, 2004
Grant Date -
Jan 24, 2002
app pub date -
Aug 2, 2001
filing date -
May 25, 1999
priority date (Note) -
Expired
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Abstract
The invention relates to a process for the in-situ preparation of alkylated single-site transition metal catalysts by contacting a precatalyst with an alkylating agent in the presence of one or more olefin monomers in the polymerization system. The precatalyst, which is produced prior to introducing into the polymerization system, is obtained by contacting a transition metal complex and boron-containing ionizing agent, optionally, with a support.
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