FIELD: chemistry.
SUBSTANCE: invention relates to a nitrile group-containing copolymer rubber containing α,β- ethylenically unsaturated monomer units in the amount of 10–60 wt.% and diene monomer units and / or α-olefin monomer units in the amount of 40–90 wt.%. Said copolymer rubber containing nitrile groups has a Z-average gyration radius of 100–1,000 nm and a plasticity number of 14–90.
EFFECT: copolymer rubber containing nitrile groups is able to provide cross-linked rubber with excellent tensile stress, resistance to residual compression and low heat-up properties during deformation.
7 cl, 2 tbl, 11 ex
