ACRYLIC RUBBER COMPOSITION, VULCANIZED RUBBER OBTAINED THEREFROM, AND USE THEREOF

摘要

To provide an acrylic rubber composition and a vulcanized rubber that ensure heat resistance of the vulcanized rubber, especially less changes in the elongation at break (EB) and hardness under heating conditions of the vulcanized rubber. An acrylic rubber composition comprising an epoxy group-containing acrylic rubber and, per 100 parts by mass of the epoxy group-containing acrylic rubber, from 10 to 100 parts by mass of carbon black, from 0.1 to 15 parts by mass of at least one primary antioxidant selected from the group consisting of an amine antioxidant and a phenolic antioxidant, from 0.1 to 15 parts by mass of at least one secondary antioxidant selected from the group consisting of a phosphorus antioxidant and a sulfur antioxidant, from 0.1 to 5 parts by mass of an imidazole compound, from 0.1 to 5 parts by mass of a trimethylthiourea, and from 0.1 to 5 parts by mass of a quaternary ammonium salt.