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Thiuram Rubber Accelerators

By DALIAN RICHON CHEM   |    Posted: 8/26 , 2021


Richon glad to introduce thiuram accelerators are a very important class of accelerators. It includes thiuram monosulfide, thiuram disulfide and thiuram polysulfide. Among them, thiuram disulfide and thiuram polysulfide can release active sulfur or sulfur-containing free radicals at standard vulcanization temperatures, so they can be used as vulcanizing agents.

The thiuram accelerator has a thiuram derivative with the general structural formula (R, R'are alkyl, aryl, cycloalkyl, etc.; x = 1 to 6). Including thiuram monosulfide, thiuram disulfide and thiuram polysulfide. It is an acidic super accelerator with activity between dithiocarbamate and thiazole accelerators. It is generally used as a second accelerator to increase the vulcanization speed and vulcanization degree of thiazole and sulfenamide accelerators. . Disulfide and polysulfide thiuram can release active sulfur at standard vulcanization temperatures, and can be used as a sulfur donor in sulfur-free vulcanization systems.

Representative varieties are tetramethylthiuram monosulfide (TMTM), tetramethylthiuram disulfide (TMTD), tetraethylthiuram disulfide (TETD), tetramethylthiuram disulfide ( DPTT) and so on.

Dalian Richon Chemical Co., Ltd. can provide you with TMTD (TT), TETD, TMTM, TRA (DPTT), TiBTD, TBzTD, TBTD, these thiuram accelerators.



TMTD is a general-purpose accelerator for natural rubber and synthetic rubber. It is also widely used as a fungicide and seed soaking agent in agriculture. Rubber accelerator TMTD is an excellent second accelerator for thiazole accelerators. It can also be used with other accelerators as an accelerator for continuous vulcanization of rubber particles. Usually it can also be used with accelerator MBT (M). In this case, it can be used with butyl rubber. The vulcanization is basically similar. The accelerator is mainly used in the manufacture of tires, inner tubes, rubber shoes, medical supplies, cables, industrial rubber products, etc. It is used as a fungicide and insecticide in agriculture, and can also be used as a lubricant additive.

 2. TMTM (TS)


TMTM is a green and environmentally friendly rubber vulcanization accelerator. It can be used not only as a vulcanizing agent, but also as an effective activator for thiazole and sulfenamide accelerators. It has the function of a secondary accelerator and makes the dispersion of thiazole and sulfenamide more good, and the product is transparent. . It is widely used in natural rubber, diene synthetic rubber, isobutyl rubber, ternary isopropyl rubber, W-type chloroprene rubber. It can be used to prepare wires, cables, rubber boots, Toys, transparent products, waterproof cloth, medical rubber products, gloves, etc.



DPTT is a white or gray-yellow powder. It is soluble in carbon disulfide, chloroform and carbon tetrachloride, but insoluble in water. It can be used for natural rubber, diene synthetic rubber, butyl rubber, EPDM rubber, chlorosulfonated polyethylene and latex. Free sulfur can be decomposed by heating, and it can also be used as a vulcanizing agent. The effective sulfur content is 25% of its weight. When used as a vulcanizing agent, this product is relatively safe at operating temperature, and the vulcanized rubber has excellent heat resistance and aging resistance. This product is easy to disperse in dry rubber and water. No pollution. Generally used in the manufacture of heat-resistant products, cables, etc.

 4. TBzTD 


The rubber accelerator TBzTD is to replace TMTD, mainly because thiuram accelerators are prone to produce carcinogenic nitrosamines, while diphenylnitrosamines are not carcinogenic. It is used as an accelerator or secondary accelerator for NR, SBR, EPDM, NBR systems. It is safer and has a longer anti-scorch time than TMTD. It is sometimes used as a PVC rubber vulcanization inhibitor.


 DalianRichon Chemical Co., Ltd. provides a domestic 2021 TMTD price trend chart.



Dalian Richon note recently TMTD’s price increased very sharply because raw materials’ price up so much.


Author: MYJ – Dalian Richon Chem Co., Ltd.

Dated: 2021-08-26