N-Cyclohexyl-2-benzothiazolesulfenamide (CBS)
CBS Accelerator, CZ, N-Cyclohexyl-2-benzothiazyl sulfenamide.
- CAS
- 95-33-0
- EC
- 202-411-2
- Sectors
- Rubber & Elastomers, Automotive
N-Cyclohexyl-2-benzothiazolesulfenamide (CBS) (CAS 95-33-0) is a benzothiazole sulfenamide accelerator supplied as a pale yellow to light beige solid for the sulfur vulcanization of natural rubber and synthetic elastomers such as SBR and NBR, offering delayed action and scorch safety in tire treads, carcasses and technical rubber goods. This Technical Grade material provides excellent scorch safety and high modulus development in various rubber compounds.
It is highly effective in natural rubber and synthetic elastomers like SBR and NBR, ensuring optimal cross-linking density during the curing process. Its granulated or powder form allows for uniform dispersion within the rubber matrix during high-speed mixing.
CBS is preferred for applications requiring high mechanical strength and resistance to aging, making it indispensable for the tire manufacturing industry. It operates efficiently at standard vulcanization temperatures while preventing premature curing during processing.
Typical Properties
| Molecular formula | C13H16N2S2 |
|---|---|
| Molecular weight | 264.41 g/mol |
| Form | Solid |
| Color | Pale Yellow to Light Beige |
| Melting point | 93-100 °C |
| Density | 1.27 g/cm³ |
| Water solubility | Insoluble |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
N-Cyclohexyl-2-benzothiazolesulfenamide (CBS)
Applications
- Tire Manufacturing: Used in tire treads and carcasses to ensure durability and heat resistance under high-stress automotive conditions.
- Technical Rubber Goods: Applied in the production of conveyor belts, hoses, and gaskets where long-term elasticity and structural integrity are required.
- Footwear Production: Utilized in rubber soles to provide abrasion resistance and consistent curing results in multi-layered molded products.
Safety & Risks
Classified as a Skin Sensitizer (Category 1) and Very Toxic to Aquatic Life. Operators must wear Dust Masks (P2), Protective Gloves, and follow strict environmental containment protocols.
Packaging
Standard packaging includes 25 kg Paper Bags or Big Bags (Super Sacks) for automated industrial rubber compounding.