| abstract |
A method for producing a crosslinkable rubber composition, the first step of preparing a carboxyl group-containing nitrile copolymer rubber (A) having an iodine value of 120 or less, and an aromatic polyvalent amine for the acrylic rubber (b1) A second step of mixing the crosslinking agent (b2) to obtain a master batch (B), and a third step of mixing the master batch (B) with the carboxyl group-containing nitrile copolymer rubber (A). A method for producing a crosslinkable rubber composition is provided. |