(1) Vulcanizing agent Any substances that can react with rubber or make it cross-link are collectively referred to as vulcanizing agent, also known as cross-linking agent. Its main function is to cross-link between rubber molecules to form a three-dimensional three-dimensional network structure. , thus greatly improving the properties of rubber, and becoming a valuable vulcanizate. 

(2) Vulcanization accelerator Vulcanization accelerator is a kind of auxiliary agent that can speed up the vulcanization reaction, shorten the vulcanization time, reduce the vulcanization temperature, reduce the amount of vulcanizing agent, and improve or improve the physical and mechanical properties of the vulcanizate. According to their properties and chemical composition, they can be divided into two categories: inorganic accelerators and organic accelerators. The use of inorganic accelerators was the earliest, but due to the small accelerator effect and poor vulcanizate performance, they have been basically replaced by organic accelerators. With the continuous development of synthetic rubber varieties and uses, the existing accelerators are complicated. According to the chemical structure of accelerators, they are usually divided into thiazoles, thiurams, sulfenamides, guanidines, dithiocarbamates, aldamines, xanthates and thioureas. 

(3) The vulcanization activator can activate the accelerator, so that the substance that can fully exert the promoting effect is called the activator, and its function is to improve the activity of the accelerator during the vulcanization reaction. The vulcanization rate can also increase the degree of crosslinking and improve the physical and mechanical properties of the vulcanizate.