Process for polymerizing tactioselective polyolefins in condensed phase using hafnocenes
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United States of America Patent
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Jun 26, 2001
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N/A
app pub date -
May 13, 1997
filing date -
May 13, 1997
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Expired
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Abstract
A process for polymerizing addition polymerizable monomers using hafnocenes catalysts/catalyst precursors having a selected symmetry condition under condensed polymerization conditions where the symmetry condition is such that the resulting polymer has varying degrees of tactioselectivity or copolymers having regions of varying degrees of tactioselectivity. Preferred classes of the haflocenes are capable of generating near pure isospecific and syndiospecific polymers in solution or in bulk polymerization conditions.
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