| 摘要 |
PROBLEM TO BE SOLVED: To provide a vulcanizable nitrile copolymer rubber composition to give a nitrile copolymer rubber vulcanizate low in gasoline permeation and excellent in sour gasoline resistance, and to provide its vulcanizate. SOLUTION: The vulcanizable nitrile copolymer rubber composition contains, based on 100 pts.wt. of a nitrile copolymer rubber having anα,β-ethylenically unsaturated nitrile monomer unit of 55-80 wt.%, 5-200 pts.wt. of magnesium silicate with an average particle diameter of≤20μm, 0.1-100 pts.wt. of a plasticizer and a vulcanizing agent. Preferably the magnesium silicate has an aspect ratio of 2-100. COPYRIGHT: (C)2007,JPO&INPIT
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