Accelerator NS is the mainstream rubber accelerator, and the oxygen oxidation process has more development prospects.

Accelerator NS, also known as accelerator TBBS, chemical name N-tert-butyl-2-benzothiazole sulfenamide, molecular formula C11H14N2S2, appearance is light yellow powder with special smell. Accelerator NS is insoluble in water, but soluble in ethanol, acetone, benzene, ethyl acetate, methylene chloride, tetrachloromethane, carbon tetrachloride, etc. Accelerator NS belongs to the sulfenamide vulcanization accelerator and is a common post-effect rubber accelerator.

There are various types of rubber vulcanization accelerator products, which can be divided according to their chemical structures. They can be mainly divided into sulfenamides, thiazoles, thiurams, guanidines, dithioformates, thioureas, etc. Sulfonamides are Among them, the category with the widest application range and the largest demand, and the accelerator NS is the mainstream product type of sulfonamide accelerators.

Accelerator NS has the advantages of general sulfonamide accelerators, with excellent scorch resistance and vulcanization speed, and good safety. Compared with the accelerator NOBS, the accelerator NS has similar performance and is non-carcinogenic, so it can be used instead of the accelerator NOBS. The performance of accelerator NS is also close to that of accelerator CBS (accelerator CZ), and its uses are similar to the latter. In comparison, its aftereffects are greater. Accelerator NS can be used as an additive for a variety of rubbers and can be widely used in the manufacturing of tires, shoes, tapes, hoses, cables, etc.

The preparation of accelerator NS is to use accelerator M (2-mercaptobenzothiazole) as raw material, react with sodium hydroxide aqueous solution in a reaction kettle, then add tert-butylamine, sulfuric acid, and sodium hypochlorite in sequence, react under certain temperature conditions, and then It is prepared by cooling, filtering, washing, drying and other processes.

According to the “2022-2026 Promoter NS (TBBS) Industry In-depth Market Research and Investment Strategy Suggestion Report” released by the Industrial Research Center It shows that accelerators are indispensable and important additives for rubber production. Globally, China is the main accelerator producer. About 70% of the world’s accelerators are supplied by China. The global accelerator NS production capacity is mainly concentrated in China. . Among my country’s rubber accelerator products, accelerator NS and accelerator CBS are the two types with the largest output. Among them, the annual output of accelerator NS accounts for about 26%, and the annual output of accelerator CBS accounts for about 23%. Accelerator NS is the main consumer category of rubber accelerators in my country and around the world.

In my country, the main accelerator NS manufacturers include Yanggu Huatai, Lianyungang Sennics, Puyang Weilin Chemical, Ningbo Aikemu, Henan Rongxinxin, Wenzhou Gray Chemical, etc.

Industry analysts said that in recent years, my country’s environmental protection policies have become increasingly strict, and the traditional accelerator NS production process requires the use of tert-butylamine, sulfuric acid, and sodium hypochlorite As catalysts, a large amount of wastewater will be produced during the production process, which will have a great impact on the environment. Industry equipment improvement and process upgrading are inevitable trends. The oxygen oxidation method using oxygen, copper acetate, cobalt phthalocyanine, etc. as catalysts is a new synthesis process of accelerator NS. It produces very little wastewater, has low energy consumption, good selectivity, high yield, and has more development prospects.

In February 2021, the Ministry of Ecology and Environment of my country released the “Comprehensive List of Environmental Protection (New Parts in 2020)” (Draft for Comments), and the accelerator TBBS (except for the oxygen oxidation method) was included in the “High Pollution and High Environmental Risk” products list, and the production process of oxygen oxidation accelerator TBBS is included in the list of excluded processes for “high pollution and high environmental risk” products. From this point of view, the oxygen oxidation production process will become the mainstream production method in my country’s accelerator NS industry in the future.