In natural rubber, in combination with sulfur, it can prevent vulcanization reversion, improve heat resistance, reduce heat generation, anti-aging, and improve the adhesion between rubber and cord and the modulus of vulcanized rubber. Chemicalbook is used in the shoulder rubber of truck tires, buffer layers and other rubbers, which can solve the problem of shoulder gap of biased truck tires, and can also be used in large-sized and thick natural rubber products and various rubber miscellaneous products.