Preparation method of rubber vulcanization accelerator tetra(isobutyl)thioperoxydicarbamic acid (TiBTD)

Abstract

The invention provides a preparation method of a rubber vulcanization accelerator tetra(isobutyl)thioperoxydicarbamic acid (TiBTD). In the method, the rubber vulcanization accelerator TiBTD comprises 1 portion of diisobutylamine, 1.26-1.28 portions of carbon bisulfide, 0.49-0.53 portion of oxidant and 0.015-0.019 portion of anionic surfactant. The method comprises the following steps: orderly adding specified amounts of di-iso-butylmanice, alcohols or water, and anionic surfactant into a 2000L enamel reaction kettle while stirring; starting cooling water, cooling to 42-46 DEG C, and dropwise adding accurately metered carbon bisulfide liquid for 6-7 hours; after dropwise adding finishes, measuring the pH value of the reactant liquor to 8-9, and after the pH value becomes stable, and starting to dropwise add oxidant at 58-62 DEG C to carry out oxidation reaction for 5-6 hours; and after the oxidation finishes, keeping the temperature to react for 1 hour, carrying out solid-liquid separation, discarding the liquid, drying the solid, pulverizing, screening and packaging. The oxidant is hydrogen peroxide or sodium hypochlorite, and the anionic surfactant is sodium dodecylsulfate.

Description

technical field [0001] The invention relates to a rubber vulcanization accelerator, especially a production method of the rubber vulcanization accelerator diisobutylthiuram disulfide. Background technique [0002] In recent years, with the rapid development of the rubber processing industry, the rapid development of the domestic automobile industry and communication industry has driven the rapid growth of the rubber processing industry and provided unprecedented good opportunities for the development of the rubber additives industry. Since joining the WTO, although the production of rubber accelerator products in my country has been greatly improved, compared with developed countries in the world, there is still a big gap in product intrinsic quality and "green" environmental protection technology. China's auxiliaries industry will expand the market share of green and non-toxic auxiliaries, and greatly reduce the sulfenamide accelerators containing nitrosamines and producing...

AI Technical Summary

Problems solved by technology

[0003] The production technology of rubber vulcanization accelerator diisobutylthiuram disulfide (TiBTD) is generally produced by acid-base method in China. In addition to producing a large amount of inorganic salt waste water in these processes, the more serious problem is that The use of a large amount of highly corrosive raw materials such as acids and alkalis leads to high hidden dangers in production safety and high energy consumption, which brings great difficulties to environmental protection and makes it difficult to achieve "clean" and "green" production. It does not comply with national environmental protection policies and regulations Production Requirements for Energy Saving and Emission Reduction

At the same time, in some existing preparation methods, the yield of the reaction is low, and the obtained product has a low melting point, low purity, and yellow appearance, which is difficult to meet the high-end requirements of the domestic and foreign sales markets.

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