Bimetallic complex catalyst systems, their preparations and application in the hydrogenation of unsaturated copolymers

摘要

The present invention relates to a new bimetallic complex catalyst system having the empirical formula of M.sup.1.sub.a M.sup.2.sub. b X.sub. m (L.sub.1).sub.n, wherein M.sup.1 is Rh or Ru, M.sup.2 is Ru or a lanthanide, when M.sup.1 is Rh, M.sup.2 is Ru or a lanthanide; when M. sup.1 is Ru, M.sup.2 is a lanthanide; X is H, Cl, Br or the combinations thereof; L.sub.1 is the ligand to the metal sa 1≦a≦4; 1. ltoreq. b≦2; 3≦m≦6; 6≦n≦15. The present invention also relates to a corresponding improved process for the hydrogenation of unsaturated copolymers, particularly NBR type rubber, wherein the above mentioned new bimetallic complex catalyst system is used.