Many types of antioxidants, the role of each one. According to the main role of antioxidants can be divided into thermal oxidative aging antioxidant, anti-aging antioxidant ozone, harmful metal ions inhibitors, anti-fatigue antioxidant, anti-ultraviolet radiation, such as antioxidants, but more often than not the role of each antioxidant certain proprietary antioxidant. Most of these antioxidants have much effect but of degree. We can only be classified according to their primary role, as classified by the chemical structure of antioxidants can be divided into the following categories: amine-amine antioxidant protective effect of the most prominent, but also found in the earliest, most varieties of a class. Its main role is to thermal oxidative aging, anti-ozone aging, and copper ions, light, flex and other aging is also a significant protective effect. This is a phenolic antioxidant, antioxidant and type of antioxidant heterocyclic unmatched. Just big polluters such antioxidant properties, and is not suitable for white and light-colored products. Wherein one amine antioxidant having the best antioxidant effect. Ketoamine now commonly used varieties are described as follows: 6-ethoxy-2,2,4-trimethyl-1,2-dihydro-quinoline trade name antioxidant AW. This product is a brown viscous liquid rubber antioxidant SP-P, pure light brown viscous liquid cylinder. Non-toxic, than the 1.029 ~ 1.030 (25 ℃) pollution rubber antioxidant SP-C, the boiling point of 169 ℃. Soluble in benzene, acetone, carbon oxide, carbon tetrachloride, solvent gasoline and ethanol; insoluble in water. Storage stability. Is anti-ozone antioxidant effects of flex cracking and thermal aging also have a protective role. Particularly suitable for use under dynamic conditions article. Not blooming, polluting, suitable light products. When sulfide affects 1 to 2 parts small amount of rubber antioxidant SP-P 25KG, increased significantly promote three vulcanized rubber antioxidant SP-C in powder form, when used to promote the dosage should be reduced appropriately. Antioxidant 2,2,4-trimethyl-1,2-dihydro-quinoline aggregate trade name antioxidant RD. Antioxidant SP-P Introduction Chemical composition of styrene phenol, inorganic fillers aromatic compounds [type] [Applications] antioxidant SP SP-P is adsorbed on a certain proportion of inorganic filler powder or granular solid appearance white - light yellow. For rubber, plastics have excellent anti-aging effects, can improve product acid, heat resistance, flexural cracking performance. Provide the corresponding types of products according to different purposes, different models SP content. Rubber Antioxidant SP-P Antioxidant Properties and Application】 1, SP soluble in ethanol, acetone, benzene and hydrocarbon solvents. 2, SP is not polluting old age type for use in natural and synthetic rubber products. It does not precipitate and dispersed. For white and light-colored products. Mainly to prevent thermal oxidative aging and flex cracking. Dosage: 0.5-3%. 3, used as the polyolefin, polyoxymethylene antioxidant, added in an amount of 0.01 to 0.5% polyolefin. 4, SP also be used as styrene-butadiene, isoprene, B and C class synthetic rubber stabilizer, the amount of 0.01-0.5%.