Patent ID: 8084548
Filing Date: 2011-12-27
Classification: C08C,C08F

Abstract:
1. A process for selectively hydrogenating carbon-carbon double bonds in a diene-based polymer which comprises repeating units of at least one conjugated diene as monomer (a) and at least one further copolymerizable monomer (b) comprising subjecting the diene-based polymer which comprises repeating units of at last one conjugated diene as monomer (a) and at least one further copolymerizable monomer (b) and which is present in bulk form to a hydrogenation in the absence of any organic solvent and in the presence of 0.001% by weight - 0.95% by weight of an iridium containing catalyst, based on the polymer to be hydrogenated, wherein an iridium complex having the general formula (I) is used as catalyst, wherein COD means 1,5 cyclooctadiene, L means PR L′ means PR