| 摘要 |
A crosslinked rubber object for fuel sealing which is obtained by crosslinking a nitrile rubber composition that comprises (A) a nitrile rubber and (B) an inorganic filler having an aspect ratio of 30-2,000, the amount of the inorganic filler (B) being 1-200 parts by weight per 100 parts by weight of the nitrile rubber (A), the nitrile rubber (A) comprising (a1) 25-80 wt% units of an α,β-ethylenically unsaturated nitrile monomer, (a2) 20-75 wt% units of a conjugated diene monomer, and (a3) 0-30 wt% units of a cationic monomer and/or units of a monomer capable of forming a cation, and the nitrile rubber (A) having a compression set of 20% or less after having been compressed in 100ºC atmosphere for 70 hours. The crosslinked rubber object is obtained from the nitrile rubber composition through secondary vulcanization conducted at 100-150ºC for 1-24 hours. |
