| abstract |
(57) [Summary] (Modified) [Purpose] Heat resistance and deterioration oil resistance used for automobile parts, Provided is a novel acrylic rubber composition for molding a gasket having excellent compression set and compression set in oil. [Structure] (1) A) Butyl acrylate unit 55 to 65% by weight, B) Ethyl acrylate unit 30 to 40% by weight, C) Acrylonitrile unit 3 to 7 wt%, d) 0.1 to 5 wt% of ethylenically unsaturated monomer unit having vinyl group-containing organic silicon group (however, a) to d) is 100 wt% in total. 100 parts by weight of an acrylic rubber polymer having a vinyl group-containing organosilicon group consisting of (2), (2) Reinforcing filler 1 0 to 200 parts by weight, (3) organic peroxide-based vulcanizing agent 0.1 -10 parts by weight. |