Patent ID: 7169839

Claim:
An acrylic rubber composition, comprising: acrylic rubber, as a base material for said acrylic rubber composition and wherein said acrylic rubber is a type which contains carboxyl group and monomer units of ethyl acrylate (A), n-butyl acrylate (B), and cure site monomer; a vulcanizing agent, comprising: a diamine compound, a non-chelating guanidine compound, and a metal chelated guanidine compound, is added to said acrylic rubber at 4.3–8.1 parts by weight for every 100 parts by weight of acrylic rubber; a ratio (B/A) of the amount of n-butyl acrylate (B) with respect to ethyl acrylate (A) is 1.0 or less, wherein the acrylic rubber acts as a joining surface layer joined to a member comprising at least one of aluminum and aluminum alloy in a heat-resistant hose; and wherein at least one selected from the group consisting of carbon black, anti-oxidant, plasticizer, processing aid, scorch retardant, flame retardant, and coloring agent are mixed into said acrylic rubber composition.