Hydrogenation catalyst composition and process for hydrogenating olefinically unsaturated polymer using the same.

摘要

A hydrogenation catalyst composition comprising, as essential components, (a) at least one bis(cyclopentadienyl)transition metal compound represented by general formula (i): <CHEM> and (b) at least one member selected from the group consisting of complex compounds represented by general formulas (ii) and (iii): M<2>(AlR<3>R<4>R<5>R<6>) (ii) M<2>(MgR<3>R<4>R<6>) (iii) and further comprising, if necessary, (c) at least one polar compound selected from the group consisting of ether compounds, thioether compounds, ketone compounds, sulfoxide compounds, carboxylic acid ester compounds, lactone compounds, amine compounds, amide compounds, nitrile compounds and oxime compounds and/or (d) an alkali compound represented by general formula (iv): M<2>OR<7> (iv) The contact of an olefinically unsaturated polymer with hydrogen in the presence of said catalyst composition enables the selective hydrogenation of the olefinic double bonds in said polymer. The thus obtained hydrogenated polymer has excellent weather resistance, heat resistance and oxidation resistance.