Rubber accelerator TBBS developments

TBSI some of the disabled at the same time, there is also actively looking for alternatives or new, will not have a promoter of nitrosamine species. Accelerator TBBS (NS) is the primary amine structure, there is no nitrosamines produce toxic substances, and its performance enhancers NOBS similar, so much attention to its production growth rate is also growing rapidly.

TBBS foreign production and consumption

TBBS is currently abroad, the use of rubber processing in the process of the main varieties, production and demand has been on the rise. The United States and Western Europe accounted for consumption at the TBBS Sulfonamide promoter of the total sales of around 60%. As a result, the United States TBBS the main raw material for production of t-n from 120,000 tons / year rose to 210,000 tons / year. TBBS the main U.S. production company has actually benefits the company (trade names: Santocure TBBS), Luo Yier unilever Corporation (trade names: DelacNS). Sterling Chemicals Corporation in the United States t-n the main producer, with a total production capacity of nearly 10,000 tons / year. United States 78.5% n t-promoter used in the production of TBBS.

TBBS Japan's output in 1989 accounted for by the promoter 13.2 percent of total output in 1993 rose to 35%. Other Asian countries and regions in the development of rubber industry, an increase of the consumption of rubber chemicals, accelerator TBBS consumption is expected to be 10% to 20% annual growth rate of increase. If South Korea and Taiwan in 1990 to promote the production of 05,000 tons agent, consumer 02,800 tons in 1993, the production of 10,800 tons, 07,800 tons consumption. In 1990 in which consumer TBBS 420 tons in 1993 to 1533 tons. Promoter consumption increased by 2.79 times that of three years, TBBS consumption increased by 3.65 times.

According to forecasts, the world's automobile production in 2000 will be more than 6,000,000, to be rubber
For about 20,000,000 tons. Auxiliary demand of about 900,000 tons. According to the U.S. "Chemical Weekly," predicted that in 2000 anti-degradation agent to be 426,000 tons, 263,000 tons promoter, and other auxiliary 50,000 tons. TBBS therefore the demand will increase.

Domestic Situation

From the early 80's to promote the development of agent TBBS research, but the raw materials n t-synthesis technology issues, resulting in slow progress of research. In recent years, many of the international restrictions on the use of agents to promote laws and regulations were introduced in our country caused by rubber additives and processing industry of great importance to China's output of the accelerator NOBS also be phased out.

TBBS raw materials and t-n the development of very lively and made some progress. Ying Shandong Department of rubber chemicals Co., Ltd. successfully developed its raw materials TBBS t-n, has been listed on the product, the production capacity of 200 tons / year, it is learned that the company intended to expand the production capacity of 2000 tons / year. In addition, the chemical plant in Nanjing, Shandong plant additives, organic chemical single county, north-east and additives plant in Tianjin Organic Chemical Plant in the development of TBBS. At present, domestic TBBS involved in the development of the two aspects, one is the uncle of raw materials n the development, if the production of urea, TBBS so that the cost is too high, users can not accept. TBBS the other is not yet open market. At present, domestic consumption is still the largest NOBS, which few TBBS sales. Although in the long run, with the increased restrictions on the NOBS, TBBS if the price control in a suitable price, its market prospect is very good, but its market share in the near future is not high.

Synthesis of TBBS

TBBS through the General SYNTHESIS promoter M (2 - mercaptan MBT) and t-n-oxidants in the existence of condensation under the current industrial synthesis of sodium hypochlorite is commonly used to do oxidant, a fairly complete process. Add a small amount of water in the surfactant can be fully distributed to M, solubilization, so as to enhance the yield. Japan's Toho Rayon reported that the patent yield up to 95% to 96.7%. China introduced the one-step patented direct oxidation of TBBS. In order to avoid oxidation of sodium hypochlorite in a large number of inorganic salt formation, the development of the oxygen or air oxidation. Aksu, such as the Monsanto Company has reported patent. This reaction speed, selectivity, high yield. Aksu company introduced the product patent melting point of up to 108 ~ 110 ℃, the middle rate of 99.8 percent.