Ncyclohexyl2benzothiazole

Ncyclohexyl2benzothiazolesulfenamide, often abbreviated as CBS or NCBS, is a chemical compound used primarily as a vulcanization accelerator in the rubber industry. It is a member of the sulfenamide class of accelerators, which are known for their delayed action, providing a scorch-free processing period before rapid vulcanization occurs. This property is crucial for manufacturing complex rubber articles where premature cross-linking could lead to defects.

CBS is synthesized through the reaction of 2-mercaptobenzothiazole with cyclohexylamine. It is typically supplied as a granular or powdered solid. Its mechanism of action involves the release of active sulfur species at elevated temperatures, which then participate in the cross-linking of polymer chains in rubber compounds, transforming the raw, plastic material into a strong, elastic product.

The use of CBS is widespread in the production of tires, conveyor belts, hoses, and various other rubber goods. It offers a good balance between scorch safety and cure rate, making it a versatile choice for many rubber formulations. Its effectiveness is influenced by factors such as temperature, the presence of other additives, and the specific type of rubber being processed. While generally considered safe when handled appropriately, like many industrial chemicals, proper safety precautions should be observed during its handling and processing.