Anti-aging agents are additive, so several anti-aging agents with different performance requirements are generally used together.
①The thermal aging of heat-resistant rubber is a kind of oxidative aging caused by free radicals, and amine or phenolic radical blockers are better for preventing such aging. For products requiring high heat resistance, heat-resistant antioxidants such as diphenylamine and TMDQ can be selected. Further, by using these radical inhibitors together with a peroxide decomposer such as an antioxidant, more excellent heat resistance can be obtained. MB1
② Flexural crack resistance Flexural cracking is the result of oxidative aging on the surface of the product due to free radical reaction. To prevent this form of aging, the choice of amine or phenolic antiozonants (free radical inhibitors) has a role to play. Among them, the effect of large surface mobility is excellent.
③Ozone resistance Antiozonants include p-phenylenediamine, TMDQ, thiourea and protective wax.