Accelerator CBS(CZ)
Product name: CBS(CZ)
Chemical name: N-Cyclohexyl-2-benzothiazole sulfenamide
Structure:
CAS No.: 95-33-0
Specification:
| Item | Granular | Powder | Oil powder |
| Appearance | Grayish-white granular | Grayish-white powder | Grayish-white oily powder |
| Initial melting point [≥ °C] | 98.0 | 98.0 | 98.0 |
| Loss on drying [≤ %] | 0.30 | 0.30 | 0.30 |
| Ash [≤ %] | 0.30 | 0.30 | 0.30 |
| Residue on 100 mesh sieve [≤ %] | – | 0.50 | – |
| Granular diameter [mm] | 1.5-3 | – | – |
| Broken strength [N] | 2-5 | – | – |
| Oil content [%] | – | – | 1.0-2.0 |
What is CBS?
CBS (N-Cyclohexyl-2-benzothiazolesulfenamide) is a widely used medium-fast primary accelerator in rubber vulcanization, particularly valued for its delayed-action curing and high processing safety. It performs effectively in a broad range of rubber types and is known to prevent premature scorching under standard processing temperatures. Due to its reliable curing behavior and the excellent physical properties it imparts to vulcanized rubber, CBS has become one of the most commonly used accelerators in the rubber industry. It is typically applied on its own, but its activity can be further enhanced when used in combination with other accelerators.
Properties
Has a faint odor and a specific gravity between 1.26 and 1.31. It is soluble in benzene, chloroform, and carbon disulfide, but insoluble in water.
Applications
CBS is a medium-fast primary accelerator suitable for NR, IR, SBR, NBR, HR, and EPDM rubbers. It is known for its excellent delayed-action characteristics, making it highly effective and safe under standard processing conditions — it does not cause premature scorching. The vulcanized products exhibit very good physical properties and rapid cure completion. CBS is typically used alone, but when combined with accelerators such as D, Willing, or TS, its activity can be significantly enhanced.
Packaging
Supplied in 25 kg bags.
Storage
Store in a cool, dry, and well-ventilated area with the container tightly sealed. Under normal storage conditions, the maximum recommended shelf life is 1 year. gravity between 1.26 and 1.31. It is soluble in benzene, chloroform, and carbon disulfide, but insoluble in water.