| abstract |
The present invention provides a rubber composition for a transmission belt which makes it possible to produce a transmission belt having an excellent electrical conductivity, having an excellent ability to maintain an electrical conductivity even after driving, and having excellent flex fatigue resistance and abrasion resistance. n The present invention is a rubber composition for a transmission belt containing a rubber, a furnace carbon black, zinc oxide, and stearic acid, wherein the furnace carbon black has a nitrogen adsorption specific surface area of not less than 75 m 2 /g and a DBP oil absorption of not less than 100 cm 3 /100 g, the furnace carbon black content is 50 to 100 parts by mass relative to 100 parts by mass of the rubber, the zinc oxide content is not less than 6 parts by mass relative to 100 parts by mass of the rubber, and the stearic acid content is not less than 1 part by mass relative to 100 parts by mass of the rubber. |