| abstract |
PROBLEM TO BE SOLVED: To provide a vulcanizable nitrile copolymer rubber composition which gives a nitrile copolymer rubber vulcanizate having small gasoline permeability and excellent sour gasoline resistance, ozone resistance and cold resistance. SOLUTION: Acrylic resin or vinyl chloride resin 10-100 with respect to 100 parts by weight of nitrile copolymer rubber (A) having 55-80% by weight of α, β-ethylenically unsaturated nitrile monomer unit. A vulcanizable nitrile containing a part by weight, a filler of 10 to 500 parts by weight, a plasticizer of 0.1 to 200 parts by weight and a vulcanizing agent and giving a vulcanized product having an embrittlement temperature of -50 to -5 ° C The above problem is solved by the copolymer rubber composition. Preferably, the plasticizer comprises a dibasic acid ester compound (c) of a dibasic acid (a) having a specific chemical structure and an ether bond-containing alcohol (b). [Selection figure] None |