THIOCARBAMYL SULFENAMIDE

Thiocarbamyl sulfenamide is a non-staining, primary accelerator for natural and synthetic rubbers such as EPDM, SBR, Nitrile, and Butyl, and is more efficient than other sulfenamide accelerators.
Thiocarbamyl sulfenamide is a vulcanizing agent and delayed accelerator, and has better scorch safety than Willing M and Willing MDB.
Thiocarbamyl sulfenamide can be utilized to produce excellent economical, semi-EV cure systems, with a preferred dosage ratio of 2 parts Thiocarbamyl sulfenamide to 1 part of another sulfenamide like BBTS or CBTS.

CAS Number: 13752-51-7
EC Number: 237-335-9
Molecular Formula: C9H16N2O2S2
Molecular Weight: 248.37

Synonyms: 4-[(4-Morpholinylthio)thioxomethyl]-morpholine; ACCELERATOR OTOS; CURE-RITE 18; N-OXYDIETHYLENE THIOCARBAMYL-N-OXYDIETHYLENE SULFENAMIDE; morpholin-4-yl morpholine-4-carbodithioate; 4-((4-morpholinylthio)thioxomethyl)-morpholin; 4-((morpholinothiocarbonyl)thio)-morpholin; 4-((morpholinothiocarbonyl)thio)morpholine;4-[(4-Morpholinylthio)thioxomethyl]-morpholine;Thiocarbamyl sulfenamide;OTOS; N-Oxydiethylenethiocarbamyl-N-oxydiethylene sulfenamide 4-[(4-Morpholinylthio)thioxomethyl]-morpholine ,4-[(4-Morpholinylthio)thioxomethyl]-morpholine,ACCELERATOR OTOS,CURE-RITE 18,N-OXYDIETHYLENE THIOCARBAMYL-N-OXYDIETHYLENE SULFENAMIDE,morpholin-4-yl morpholine-4-carbodithioate,4-((4-morpholinylthio)thioxomethyl)-morpholin,4-((morpholinothiocarbonyl)thio)-morpholin,4-((morpholinothiocarbonyl)thio)morpholine, Acceleratorotos; 13752-51-7; OTOS; Cure-Rite18; Morpholine,4-[(4-morpholinylthio)thioxomethyl]-; morpholin-4-ylmorpholine-4-carbodithioate

Thiocarbamyl sulfenamide compounds are an important class of chemicals used primarily in the rubber industry.
They serve as accelerators in the vulcanization process of rubber.
Vulcanization is a chemical process that involves the addition of sulfur or other equivalent curatives or accelerators to rubber to improve its elasticity and strength.

Thiocarbamyl sulfenamide is a non-staining, primary accelerator for natural and synthetic rubbers such as EPDM, SBR, Nitrile and Butyl.
Thiocarbamyl sulfenamide is more efficient than other sulfenamide accelerators.

As a result, a 25% reduction in the sulfenamide portion of an accelerator system is possible when Thiocarbamyl sulfenamide is used.
This substitution will result in no loss of cure rate while maintaining good physical properties

Applications of Thiocarbamyl Sulfenamide:
Thiocarbamyl sulfenamide is a primary accelerator for NR,SBR,EPDM etc.
Thiocarbamyl sulfenamide is a vulcanizing agent and delayed accelerator, and has better scorch safety than Willing M, Willing MDB.
Thiocarbamyl sulfenamide's critical temperature is 149οC.

Thiocarbamyl sulfenamide can be utilized to produce excellent economical, semi-EV cure systems.
The preferred dosage ratio is 2 parts Thiocarbamyl sulfenamide to 1 part of another sulfenamide like BBTS or CBTS.

Sulfur loading should be kept low, 0.4 to 0.6 PHR.
Thiazoles may be used in place of the sulfenamides to speed up the cure rate and reduce reversion in natural rubber.

Heat aging and compression set properties are outstanding.
Processing properties are excellent, providing fast cure rates with good scorch safety.

Thiocarbamyl sulfenamide is also available as a polymer bound dispersion (Akrochex OTOS-70/EPR/C-LB).
Polymer bound or encapsulated dispersions are a proven means of upgrading plant safety, efficiency, quality and raw material control. 

Rubber Industry:

Tires:
They are extensively used in the production of tires due to their ability to improve the mechanical properties of the rubber.

Industrial Rubber Goods:
Other applications include belts, hoses, gaskets, and various molded goods where enhanced durability and performance are required.

Chemical Intermediates:
In some cases, they are used as intermediates in the synthesis of other chemical compounds.

Chemical Structure and Composition

Thiocarbamyl sulfenamides typically have the following general structure:
R1N−C(=