Five Important Considerations for Using Rubber Antioxidants
2012-04-24
Since each type of rubber antioxidant has its limitations in protective effects, and the aging of rubber products in actual use is the result of various influencing factors, the following points should be noted when selecting rubber antioxidants:
(1) Due to the different characteristics of each rubber antioxidant and the varying aging performance of different rubber formulations, the most effective antioxidant for one rubber product may be ineffective or even harmful to another rubber product. Therefore, the selection of rubber antioxidants must be based on the aging performance of various rubber materials, anti-aging requirements, and the characteristics of various antioxidants for a comprehensive and reasonable choice.
(2) When a single rubber antioxidant is difficult to meet the requirements, two or more rubber antioxidants should be used together to create a synergistic effect, ensuring anti-aging effectiveness.
(3) Some rubber antioxidants can cause discoloration and contamination of rubber. Generally speaking, phenolic rubber antioxidants have poor protective effects but do not cause pollution or cause very little pollution. In contrast, amine rubber antioxidants, which have higher protective effects, will cause contamination and severe discoloration of rubber. These contradictions should be considered comprehensively during selection.
(4) The amount of rubber antioxidants should not exceed their solubility in rubber to prevent blooming and contamination of the rubber surface quality.
(5) Amine rubber antioxidants have adverse effects on rubber scorching; phenolic rubber antioxidants can delay vulcanization, which should be noted during selection.
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