HYDROGENATION OF NITRILE RUBBER

摘要

This invention relates to a novel process for selectively hydrogenating nitrile rubbers in the presence of specific Ruthenium based complex catalysts without simultaneous molecular weight degradation by a metathetic reaction.

主权项

1. A process for preparing partially or fully hydrogenated nitrile rubbers characterized in that a nitrile rubber is subjected to hydrogenation in the presence of at least one complex catalyst having the general formula (I)
Ru(CO)(H)(X1)(L1)(L2)  (I)wherein
X1 is an anionic ligand, and L1 and L2 are identical or different ligands, wherein at least one of L1 and L2 represents a N-heterocyclic carbene ligand.