Patent ID: 10266682

Abstract:
A rubber obtained by cross-linking a highly saturated nitrile rubber composition has a carboxyl group-containing highly saturated nitrile rubber (A1) containing 15 to 60 wt % of α,β-ethylenically unsaturated nitrile monomer units and 1 to 60 wt % of α,β-ethylenically unsaturated dicarboxylic acid monoester monomer units and having an iodine value ≤120, a highly saturated nitrile rubber (A2) containing α,β-ethylenically unsaturated nitrile monomer units in 15 to 60 wt %, having a content of α,β-ethylenically unsaturated dicarboxylic acid monoester monomer units of 0.9 wt % or less, and an iodine value of 120 or less, a polyamide resin having a melting point ≥150° C., and a cross-linking agent. In the composition, a weight ratio of “(A1):(A2)” is 5:95 to 95:5 in range, a weight ratio of “total of (A1) and (A2):polyamide resin” is 95:5 to 50:50, and a storage elastic modulus of the cross-linked rubber at 150° C. is 5 MPa or more.