Because the protective effect of each antioxidant has its limitations, and rubber products in the actual use of the aging process is the result of a variety of factors, a single antioxidant can not well meet the protection requirements of the product, so generally are more than two antioxidants used to play its protective effectiveness. Examine the comprehensive performance of an antioxidant, mainly from the pollution, volatility, stability, compatibility, antioxidant properties, safety and environmental protection to consider, the choice of attention to several points.

1, the use of rubber products in different environments, conditions, different requirements for anti-aging, to find the factors that cause aging, to facilitate the development of rubber anti-aging formulations and the selection of antioxidants.

2, due to the different characteristics of each antioxidant, there are different aging performance of different rubber formulations. Therefore, the most effective antioxidant for a rubber, may not be effective for another rubber. Selection of antioxidants must be based on the aging properties of various rubber materials, anti-aging requirements and the characteristics of various antioxidants to consider, reasonable choice.

3, consider the impact of the process conditions during processing. If an antioxidant is difficult to meet the requirements, two or more antioxidants should be used to produce a coordinated effect, to ensure that the anti-aging effect.

4, the choice of the nature of the antioxidant itself: discoloration and pollution, volatility, solubility, stability.
(1) Some antioxidants on the surface of rubber products have coloring effects and pollution phenomenon. Generally speaking, phenolic antioxidants poor protection, but not pollution or pollution is very small.
(2) the amount of antioxidant should not exceed the solubility in the rubber to prevent spray frost, contamination of the rubber surface quality.
(3) amine antioxidants on the rubber material scorching has a negative impact; phenolic antioxidants can delay vulcanization, in the selection should be noted.