Patent ID: 7919563
Filing Date: 2011-04-05
Classification: C08C,C08F,C08L

Abstract:
1. A process for preparing hydrogenated nitrile rubber having repeating units derived from at least one conjugated diene, at least one α,β-unsaturated nitrile and optionally further one or more copolymerizable monomers, wherein the rubber has a molecular weight (MW) in the range of from 30,000 to 250,000, a Mooney viscosity (ML 1+4 @ 100 deg. C.) in the range of from 3 to 50, and a MWD (or polydispersity index) of less than 2.5 comprising the step of subjecting a nitrile rubber to a methathesis reaction in the presence of one or more compounds of the general formula I, II, III or IV and optionally the presence of a co-olefin and a solvent, wherein, wherein: wherein wherein wherein