Application of Rare Earth Stearate in Bead Protector of All-steel Giant Off-The-Road Radial Tire
The application of rare earth stearate in equivalently replacing antioxidant 4020 in the bead protector of all-steel giant off-the-road radial tires was studied.The results showed that after replacing antioxidant 4020 with an equal amount of rare earth stearate in the bead protector formula,the vulcanization rate of the compound decreased,the tensile strength and elongation at break increased,and the Akron wear decreased.After thermal oxygen aging,the tensile strength,elongation at break and retention rate were higher,and the aging resistance was better,which could effectively extend the service life of the compound.
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