| 摘要 |
A nitrile copolymer rubber composition obtained by coagulation of a nitrile copolymer latex composition comprised of a latex of a nitrile copolymer rubber (A) having α,&bgr;-ethylenically unsaturated nitrile monomer units in 55 to 80 wt % and cationic monomer units and/or monomer units able to form cations in which an inorganic filler (B) is dispersed is provided. Note that, preferably, the inorganic filler is a clay. According to the present invention, a nitrile copolymer rubber composition giving a nitrile copolymer rubber cross-linked product with an extremely low gasoline permeability and superior in sour gasoline resistance can be provided.
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