| abstract |
Disclosed is a crosslinkable nitrile rubber composition containing (a) a highly saturated nitrile rubber having an iodine number of not more than 120, which has an α,β-ethylenically unsaturated nitrile monomer unit and a monomer unit having a carboxyl group, (b) a vulcanizing agent, and (c) a specific cyclic amidine or a specific cyclic amidinium salt. The vulcanizing agent (b) is preferably composed of (d) a polyamine crosslinking agent, and the monomer unit having a carboxyl group is preferably composed of an α,β-ethylenically unsaturated dicarboxylic acid monoester monomer unit. |