Vulcanization accelerator is a kind of auxiliary agent that can accelerate the vulcanization reaction speed, shorten the vulcanization time, lower the vulcanization temperature, reduce the amount of vulcanizing agent, and can improve or improve the physical and mechanical properties of the vulcanizate. According to its nature and chemical composition, it can be divided into two categories: inorganic accelerators and organic accelerators. Inorganic accelerators were used the earliest, but due to the small promotion effect, the performance of vulcanizates was poor. Basically replaced by organic accelerators. With the continuous development of the varieties and uses of synthetic rubber, the names of existing accelerators are complex. According to the chemical structure of the accelerators, they are usually divided into thiazoles, thiurams, sulfenamides, guanidines, and dithiocarbamic acids. Salts, aldehydes, xanthates and thioureas.