| abstract |
α, β-ethylenically unsaturated nitrile monomer unit (a1) 35-80% by weight, conjugated diene monomer unit (a2) 19.5-64.5% by weight, and α, β-ethylenic unit A nitrile copolymer rubber (A) containing 0.5 to 20% by weight of a saturated carboxylic acid monomer unit (a3) and an inorganic filler (B) having an aspect ratio of 30 to 2,000. A nitrile copolymer rubber composition having a content of the inorganic filler (B) of 1 to 200 parts by weight with respect to 100 parts by weight of the nitrile copolymer rubber (A) is provided. |