OIL-RESISTANT AND ANTI-DEGRADING RUBBER ARTICLE

摘要

An anti-degrading rubber article to be used in contact with a mineral oil containing an oil modifier, at least that surface of said rubber article which is to come into contact with said mineral oil being composed substantially of a vulcanization product, obtained by using a sulfur vulcanization system, of a copolymer rubber having polymer chains consisting of (1) 10 to 60 % by weight of units derived from an unsaturated nitrile, (2) 2 to 30 % by weight of units derived from a conjugated diene, and (3) 88 to 10 % by weight of units derived from a copolymerizable ethylenically unsaturated monomer other than the unsaturated nitrile and/or units resulting from the hydrogenation of units derived from a conjugated diene.