FIELD: chemistry.
SUBSTANCE: invention relates to highly saturated nitrile rubber compositions, as well as cross-linked rubbers obtained from such rubber compositions. Composition comprises highly saturated nitrile rubber (A1) with iodine number equal to or less than 120, containing carboxyl groups, which contains α,β-ethylene unsaturated monomer links, monomer links of monoester α,β-ethylene unsaturated dicarboxylic acid and conjugated diene monomer links, highly saturated nitrile rubber (A2) with iodine number equal to or less than 120, which contains α,β-ethylene unsaturated monomer links, conjugated diene monomer links and optionally monomer links of monoester α,β-ethylene unsaturated dicarboxylic acid, polyamide resin (B) with fusion temperature of 100-300 °C, weight ratio of rubber (A1) and rubber (A2) ranges from 2:98 to 98:2 and ratio of content of polyamide resin (B) relative to total amount of rubber (A1) and rubber (A2) is weight ratio of “total amount of rubber (A1) and rubber (A2) : polyamide resin (B)” and ranges from 95:5 to 50:50. Said composition is cross-linked using a peroxide cross-crosslinking agent.
EFFECT: obtained cross-linked rubbers have excellent physical properties, oil resistance, fuel resistance and tensile strength at high temperatures.
9 cl, 1 tbl, 5 ex
