1. Due to the different characteristics of each antioxidant, and the aging properties of different rubber formulations are different. Therefore, the most effective antioxidant for one rubber may be ineffective or even harmful to another. Therefore, the selection of antioxidants must be considered and reasonably selected according to the aging properties of various rubber materials, anti-aging requirements and the characteristics of various antioxidants.

2. When one antioxidant is difficult to meet the requirements, two or more antioxidants should be used together to make it have a coordinated effect and ensure the anti-aging effect.

3. Some antioxidants have a coloring effect and pollution on the rubber. Generally speaking, phenolic antioxidants have poor protective effect, but do not contaminate or contaminate very little. The amine antioxidants with higher protective effect will contaminate the rubber and cause serious discoloration. These contradictions should be considered in the selection process.

4. The amount of antioxidant should not exceed the solubility in rubber to prevent frost spray and pollute the surface quality of rubber

5. Amine antioxidants have adverse effects on rubber scorch; phenolic antioxidants can delay vulcanization and should be paid attention to when selecting them.