| abstract |
Provided is a crosslinked rubber whereof resistance to fuel oil and resistance to cold are both excellent. This crosslinking rubber composition contains: a nitrile group-containing copolymer rubber [A] having less than 30% by weight of an α,β-ethylenic unsaturated nitrile monomer unit (a1), a conjugated diene monomer unit (b1) and an α,β-ethylenic unsaturated dicarboxylic acid monoester monomer unit (d1), wherein at least a portion of the conjugated diene monomer unit (b1) has been hydrogenated; a nitrile group-containing copolymer rubber [B] having 30% by weight or more of an α,β-ethylenic unsaturated nitrile monomer unit (a2), and a conjugated diene monomer unit (b2), wherein at least a portion of the conjugated diene monomer unit (b2) has been hydrogenated optionally; and an amine series crosslinking agent. |