Process for producing vulcanization of rubber accelerant disulfide diisobutyl thiuram

Abstract

A production method of the diisobutylthiuram disulfide-accelerant of the vulcanization of rubber is provided, which is the production method of the accelerant of the vulcanization of rubber. The method overcomes the defects existing when others produce the product. The raw materials and the mixture ratio of the invention are diisobutylamine : carbon disulfide : oxidant equals to 1 : 1-1.3 : 0.35-0.55; the production method is that enamel reaction axe with volume of 2000L is added with the diisobutylamine, alcohols or water and phase transfer catalyst with specified amount in turns; the cooling water is turned on with temperature reduced to the preferential temperature and is added with carbon disulfide liquid measured accurately by drops, and the time is controlled; after added by drops, the pH value of the reaction liquid is measured to the specialized range; after the pH value is stable, the preferential temperature is controlled and the oxidant is added by drops to carry out oxidation reaction. After the oxidation reaction, the insulation temperature is kept for 1h and solid-liquid separation is conducted to abandon the liquid and dry, crush, sieve and pack the solid.

Description

1. Technical field: [0001] The invention relates to a rubber vulcanization accelerator, especially a production method of the rubber vulcanization accelerator diisobutylthiuram disulfide. 2. Background technology: [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 ...

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 strong corrosive raw materials such as acids and alkalis leads to large production safety hazards and high energy consumption, which brings great difficulties to environmental protection and does not meet the national environmental protection policies and energy-saving production requirements.

Moreover, the product has a low melting point and a yellow appearance, which makes it difficult to meet the high-end requirements of the domestic and foreign sales markets.

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