| abstract |
A composition according to the present invention comprises a styrene-based elastomer, a paraffin-based process oil, an olefin-based resin, a crosslinking agent comprising an organic peroxide, a crosslinking aid, an antioxidant, and magnesium hydroxide. The paraffin-based process oil has a kinematic viscosity (40 ° C.) of 300 mm 2 / s or more, and 100 parts by mass of the styrene-based elastomer. Relative to the paraffinic process oil is 405 to 485 parts by mass, the olefin resin is 9 to 13 parts by mass, the crosslinking agent is 5 to 7 parts by mass, the crosslinking aid is 13 to 15 parts by mass, the oxidation is The amount of the inhibitor is 3 to 4 parts by mass, and the surface treatment filler is 15 to 25 parts by mass. |