Rubber accelerator NOBS refers to rubber vulcanization accelerator. Sulfur is used for the vulcanization of rubber, but the reaction between sulfur and rubber is very slow, so the vulcanization accelerator came into being. The accelerator can activate the curing agent, accelerate the cross-linking reaction between the curing agent and the rubber molecules, shorten the curing time and reduce the curing temperature. According to their chemical structure, curing accelerators can be classified into sulfonamides, thiazoles, amides, guanidines, thioureas and dithiocarbamates. Secondary sulfonamides have good comprehensive properties and are widely used.

Rubber accelerator NOBS is an after-effect accelerator for rubber, cis-butadiene rubber, isoprene rubber, styrene-butadiene rubber and reclaimed rubber. Usually used in the manufacture of cables, tapes, rubber shoes, inner tubes, colored products, etc., including strong alkali carbon black rubber. It has the advantages of strong burning resistance, fast vulcanization speed and high elongation, which can improve the utilization rate of synthetic rubber. It can be used with glyoxalamine, guanidine and colam accelerators to form a good cure system. Mainly used in the manufacture and production of tires, rubber shoes, hoses, tapes and cables.

There are still different views on the vulcanization mechanism of rubber. This is because of the presence of insoluble rubber samples and a large number of reactions during the production of rubber products, which makes it difficult to study the vulcanization of rubber molecules into complex polymer networks. The rubber vulcanization mechanism proposed earlier can be divided into free radical mechanism and ionic mechanism. Researchers such as Bacon and Farmer believe that the allylic resonance of rubber allows hydrogens on adjacent methylene groups to be easily replaced by double bonds.

 Therefore, in the vulcanization process of the rubber accelerator NOBS, the hydrogen in the α-methylene group in the rubber is used as the starting point of the sulfur diradical reaction. In other words, the reaction process is a free radical process. Bateman et al. believed that the power supply of the double bond on the rubber would break the SS bond of S8 and dissociate into ions, that is, the vulcanization process is an ionic reaction process. To date, the vulcanization mechanism of zinc thiazole salts and zinc dithiocarbamates has been studied.