During the long-term storage and use of rubber and its products, due to the effects of heat, oxygen, ozone, metal ions with variable valence, mechanical stress, light, high-energy rays, as well as other chemical substances and molds, it gradually reduces and loses its original properties. The process of physical and mechanical properties is called aging. With the progress and development of the aging process, the properties of rubber and its products will gradually decrease and completely lose their use value. In order to prolong the service life of rubber products, it is necessary to mix some substances that can inhibit the aging process in the rubber, thereby prolonging the storage period and service life of the rubber and its products. These substances are called antioxidants.

There are many types of antioxidants with different effects. According to its main function, it can be divided into anti-thermal oxidation aging agent, anti-ozonant, harmful metal ion inhibitor, anti-fatigue agent, ultraviolet absorber, anti-cracking agent, etc. However, since each protective function is often not dedicated to a certain antioxidant, most antioxidants can act on several aging factors, but to different degrees. The antioxidants commonly used in the wire and cable industry are introduced below. The classification is not clear, only its main protective function is pointed out. The types of antioxidants include antioxidant D, antioxidant RD, antioxidant 124, antioxidant MB, antioxidant DNP, and antioxidant DNP, of which Taizhou Shengfeng Chemical specializes in the production of antioxidant MB.

Since the protective effect of each antioxidant is limited, and the aging of rubber products in actual use is the result of many factors, the following points should be paid attention to when choosing an antioxidant:

(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 material may be ineffective or even harmful to another rubber material. 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 them 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 pollute or pollute very little. Amine antioxidants with higher protective effect will cause rubber pollution and serious discoloration. These contradictions should be considered in the selection process.

(4) The dosage of antioxidant should not exceed the solubility in rubber to prevent frost spray and contaminate the surface quality of rubber.

(5) Amine antioxidants have an adverse effect on rubber scorch; phenolic antioxidants can delay vulcanization, so care should be taken when selecting them.