Antioxidants are chemical substances. When it is only present in the polymer system, it can delay or inhibit the oxidation process of the polymer, thereby preventing the polymer from aging and prolonging its service life, also known as an anti-aging agent.

Why are antioxidants added to plastics and elastomers?

An effective solution to elastomer yellowing is the addition of antioxidants and UV absorbers, which can effectively prevent and delay yellowing. For engineering plastics processing, antioxidants can prevent the thermal oxidative degradation of certain polymers (such as ABS) during processing, so that the molding process can proceed smoothly. The amount of antioxidants added is generally only 0.1-0.5 parts.

Classification of antioxidants added to plastics and elastomers:

Antioxidant classification, one is the main antioxidant: capture oxidative free radicals, mainly hindered phenol antioxidants; mainly anti-sterically hindered phenols, antioxidant 1010. Antioxidant 1076 belongs to this category and has a long-lasting antioxidant effect by capturing free radicals generated during plastic degradation.

One is auxiliary antioxidants: decomposes hydroperoxides, mainly phosphites and thioesters. Auxiliary resistance - phosphite and thioester, antioxidant 168 belongs to phosphite auxiliary resistance, and achieves the purpose of anti-oxidation by decomposing the peroxide generated by the further degradation of plastic, mainly providing thermal processing stability; main resistance + auxiliary Resistance can have a synergistic effect.