Hydrogenation of unsaturated polymers using divalent diene-containing bis-cyclopentadienyl group IV metal catalysts

US6476283B1 · kind B1 · utility

Assignee

• THE DOW CHEMICAL COMPANY · US

Inventors

• David D. Devore · Midland, US
• James C. Stevens · Richmond, US
• Stephen F. Hahn · Midland, US
• Francis J. Timmers · Midland, US
• David R. Wilson · Midland, US

Key dates

• Filing date: Jun 29, 2000
• Grant date: Nov 5, 2002
• Expiry date: Oct 31, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08C19/02
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

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.