Patent ID: 8530584

Claim:
A process for reacting a nitrile rubber comprising subjecting the nitrile rubber to a metathesis reaction in the presence of the catalyst system comprising a metathesis catalyst and one or more salts of the general formula (I) K n+ A Z− (I) where K is a cation with the exception of copper and A is an anion, where n is 1, 2 or 3 and z is 1, 2 or 3, wherein metathesis catalysts of the general formula (B), where M is ruthenium or osmium, Y is oxygen (O), sulphur (S), an N—R 1 radical or a P—R 1 radical, X 1 and X 2 are identical or different ligands, R 1 is an alkyl, cycloalkyl, alkenyl, alkynyl, aryl, alkoxy, alkenyloxy, alkynyloxy, aryloxy, alkoxycarbonyl, alkylamino, alkylthio, arylthio, alkylsulphonyl or alkylsulphynyl radical, each of which may optionally be substituted by one or more alkyl, halogen, alkoxy, aryl or heteroaryl radicals, R 2 , R 3 , R 4 and R 5 are identical or different and are each hydrogen, organic or inorganic radicals, R 6 is hydrogen or an alkyl, alkenyl, alkynyl or aryl radical and L represents identical or different ligands are used as the catalyst.