| abstract |
The hydrogenation of NBR in an aromatic solvent with tris (triphenylphosphane) rhodium (1) halide as a catalyst at hydrogen pressures of 20 to 350 bar and temperatures of 100 to 145 ° C then leads to products with degrees of hydrogenation of at least 90% and excellent Properties if the catalyst concentration is 0.05 to 0.6% by weight, based on solid rubber, and if hydrogenation is carried out in the presence of at most 2% by weight of triphenylphosphine. |