| 摘要 |
PROBLEM TO BE SOLVED: To provide a nitrile group-containing copolymer rubber vulcanizate having excellent dynamic characteristics and small compression set. SOLUTION: This vulcanizable rubber composition comprises 100 pts.wt. of a rubber component composed of 5-50 pts.wt. of a nitrile group-containing copolymer rubber (A) having 10-60 wt.% content of anα,β-ethylenically unsaturated nitrile monomer unit and 180-430 iodine value and 50-95 pts.wt. of a nitrile group-containing copolymer rubber (B) having 10-60 wt.% content of theα,β- ethylenically unsaturated nitrile monomer unit and 40-100 iodine value and sulfur and/or 4,4'-dithiodimorpholine in an amount of 0.1-1.5 pts.wt. based on 100 pts.wt. of the rubber component and expressed in terms of the amount of sulfur. The vulcanizable rubber composition is vulcanized. COPYRIGHT: (C)2003,JPO
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