Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Plural component system comprising a - group i to iv metal...
Patent
1997-12-12
1999-11-23
Bell, Mark L.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Plural component system comprising a - group i to iv metal...
502113, 502117, 502152, 502155, 526160, 526943, B01J 3100, B01J 3700, C08F 402, C08F 460
Patent
active
059900334
ABSTRACT:
Compositions comprising Group 4 metal complexes in the +2 or +3 formal oxidation state and containing an anionic pentadienyl ligand or a substituted derivative thereof and activating cocatalysts are used as catalysts for polymerizing olefins, diolefins and/or acetylenically unsaturated monomers. Monovinylidene aromatic monomers in particular are polymerized to form highly syndiotactic polymers.
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Schmidt Greg F.
Wilson David R.
Bell Mark L.
Pasterczyk J.
The Dow Chemical Company
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