CATALYST COMPOSITIONS COMPRISING A GRUBBS HOVEYDA TYPE COMPLEX AND A TERMINAL OLEFIN AND THEIR USE FOR HYDROGENATION OF NITRILE RUBBER

摘要

This invention relates to novel catalyst compositions based on Ruthenium or Osmium based complex catalysts of the Grubbs Hoveyda Grela or Zhan type and specific co catalysts comprising at least one vinyl group pref. ethyl vinyl ether and to a process for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions preferably with a preceding metathesis step using the same complex catalyst as in the hydrogenation step.