Patents Represented by Attorney, Agent or Law Firm Carol Cavender
  • Hydrogenation of unsaturated polymers using divalent diene-containing bis-cyclopentadienyl group IV metal catalysts
    Patent number: 6476283
    Abstract: Organic compounds are hydrogenated in the presence of certain bis(pentadienyl) divalent Group IV metal complexes having &pgr;-bound, neutral, conjugated diene ligands. These complexes are effective hydrogenation catalysts for polymers containing ethylenic unsaturation. They further provide for selective hydrogenation of ethylenic unsaturation sites in the presence of aromatic groups.
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: November 5, 2002
    Assignee: The Dow Chemical Company
    Inventors: David D. Devore, James C. Stevens, Stephen F. Hahn, Francis J. Timmers, David R. Wilson