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摘要

PROBLEM TO BE SOLVED: To provide nitrile group-containing high saturation copolymer rubber crosslinked products having excellent low temperature durability, oil resistance and dynamic properties. ;SOLUTION: Crosslinked products can be obtained by incorporating a crosslinking agent into a nitrile group-containing high saturation copolymer rubber containing (a) 10-40 wt.% α,β-ethylenically unsaturated nitrile monomer units, (b) 10-60 wt.% α,β-ethylenically unsaturated carboxylic ester monomer units, (c) 0.01-56 wt.% conjugated diene monomer units, (d) 14-69.99 saturated conjugated diene monomer units with a total amount of monomer units (c) and monomer units (d) of 20-70 wt.% at a ratio of monomer units (d) to the sum of monomer units (c) and monomer units (d) of not less than 70 wt.% and having a temperature difference between the extrapolation glass transition initiation temperature (Tig) and the extrapolation glass transition termination temperature (Teg) by differential scanning calorimetry of not greater 1O°C to perform crosslinking treatment.;COPYRIGHT: (C)2001,JPO