Nitrile group-containing copolymer rubber and crosslinked product of nitrile group-containing copolymer rubber

摘要

It contains a nitrile group-containing copolymer rubber having an iodine value of 120 or less, a short fiber having an average fiber length of 12 mm or less, and an organic phosphorus compound, and has a glass transition temperature difference ΔTg of 10 for the nitrile group-containing copolymer rubber. C. or lower.