| abstract |
Rubber component, and the following general formula (1): [Wherein, X 1 and X 2 represent a heterocyclic group which may have a substituent.] A rubber composition containing a tetrazine compound or a salt thereof, and a processing aid, wherein the rubber composition contains 40 parts by mass or more of a diene rubber polymerized with a monomer containing a 1,3-butadiene monomer in 100 parts by mass of the rubber component. , The rubber composition containing 0.1-10 mass parts of said tetraazine compounds or its salt with respect to 100 mass parts of rubber components. |