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.
提供一种
丙烯酸橡胶组合物和
硫化橡胶,确保
硫化橡胶的耐热性,尤其是
硫化橡胶在加热条件下的断裂伸长率(EB)和硬度变化较小。
一种
丙烯酸橡胶组合物,包括含环氧基团的
丙烯酸橡胶,以及每 100 份含环氧基团的
丙烯酸橡胶中含 10 至 100 份碳黑、0.1 至 15 份至少一种一级
抗氧化剂(选自
胺类抗氧化剂和
酚类抗氧化剂)、0.1 至 15 份(质量份数)至少一种二级
抗氧化剂(选自
磷抗氧化剂和
硫抗氧化剂)、0.1 至 5 份(质量份数)
咪唑化合物、0.1 至 5 份(质量份数)三甲基
硫脲和 0.1 至 5 份(质量份数)季
铵盐。