Polymer hydrogenation process

US4816525A · kind A · utility

Assignee

• University of Waterloo · CA

Inventors

• Garry L. Rempel · Waterloo, CA
• Navroz A. Mohammadi · Sarnia, CA
• Rajeev Farwaha · Brampton, CA

Key dates

• Filing date: Jul 6, 1987
• Grant date: Mar 28, 1989
• Expiry date: Jul 6, 2007

Classification

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

Abstract

Selective hydrogenation of the carbon-carbon double bonds of conjugated diene copolymers is effective homogeneous solution in an organic solvent in the presence of certain divalent ruthenium carbonyl complex catalysts. The ruthenium catalysts have the general formula: EQU Ru(CO)HA(Z).sub.3 ( 1) wherein A is a halogen atom, most preferably chlorine, or a hydrogen atom and Z is -PR.sub.1 R.sub.2 R.sub.3 in which R.sub.1, R.sub.2 and R.sub.3 are the same or different and are selected from alkyl and aryl groups, preferably all the phenyl group, or have the general formula: EQU Ru(CO)XY(Z).sub.2 ( 2) wherein X is a carboxylate group, particularly ClCH.sub.2 COO--, Cl.sub.2 CHCOO--, Cl.sub.3 CCOO--, F.sub.3 CCOO--, CH.sub.3 COO--, C.sub.6 H.sub.5 COO-- or p--ClC.sub.6 H.sub.4 COO--, y is a halogen atom, preferably a chlorine atom or a bromine atom, or a hydrogen atom or a carboxylate group, Z is as defined above.