Should rubber vulcanization accelerators be discontinued?

With the rapid growth in global demand for rubber products, the safety and environmental concerns of rubber vulcanization accelerators are becoming more prominent, and many countries have decreed that the production and use of certain accelerators that are carcinogenic or suspected of being carcinogenic should be discontinued.

What are the different types of vulcanization accelerators?

Vulcanization accelerators widely used in industry can be divided into three series: (1) guanidine based accelerators, such as diphenylguanidine (DPG); (2) dithiocarbamic acid based accelerators, such as TMTD; and (3) 2-mercaptobenzothiazole based accelerators, such as MBTS.

Does zinc oxide activate vulcanization reaction in Dithiocarbamates and tetramethylthiuram disulfide?

At the same time, zinc oxide and stearic acid were found to activate the vulcanization reaction during the vulcanization of dithiocarbamates and tetramethylthiuram disulfide accelerators, which may react with the vulcanization accelerator to produce more reactive zinc compounds. compound.

What are vulcanization accelerators & activators?

For sulfur yellow vulcanization systems, vulcanization accelerators and activators are essential. They can reduce the amount of sulfur yellow, shorten the vulcanization time, lower the vulcanization temperature, and at the same time improve the degree of vulcanization and the physicochemical properties of the vulcanized rubber.

How does vulcanization affect the performance of rubber products?

Vulcanization, as the key step in rubber process，directly affects the processing and performance of rubber products. Compared with sulfur alone, the presence of small amounts of accelerator together with sulfur can significantly improve the properties of final vulcanisate.

What is the history of vulcanization accelerator?

The milestone in the history of vulcanization accelerator is the discovery of 2-mercaptobenzothiazole (MBT) type accelerator and its derivative hyposulfide accelerator by Bedford, Sebrell and others in 1930.