It is also an important factor that leads to poor rubber resilience and slow vulcanization speed. As the white carbon black itself is acidic, and the added structure control agents are mostly acidic, the rubber is acidic. The acidic rubber has a delayed effect on vulcanization, and the high temperature resistance will decrease. The acid content of the rubber compound can be improved by adding appropriate weak alkaline substances. Generally, the PH value of the rubber compound in the neutral or weak alkaline range is good for improving the elasticity and vulcanization speed.