| abstract |
The present invention provides a molding having excellent sealing properties, heat resistance, acid resistance, low reaction force, low hardness, small compression set, and particularly improved compression set and compression cracking property at high temperature. It is an object of the present invention to provide a rubber composition capable of producing a body, its use, and a main body mounted with the rubber composition. A rubber composition according to the present invention is obtained by surface-modifying a specific ethylene / α-olefin / non-conjugated polyene copolymer [A] and carbon black [B] and precipitated silica. It contains a surface-modified silica [C] having a specific surface area of 30 to 80 m 2 / g, a particle diameter by a Coulter counter method of 1.0 to 4.0 μm, and an M value of 50 or more. It is characterized by that. [Selection figure] None |