Accelerator DCBS, CAS 4979-32-2 (N,N-dicyclohexyl-2-benzothiazolesulfenamide), is a sulfenamide (delayed-action) rubber accelerator. Its two cyclohexyl groups give exceptionally long scorch safety, which makes it the accelerator of choice for thick sections and large articles where heat build-up during cure is slow. PolyBlueChem supplies it to the specification below with per-batch COA and SDS.
Specifications
| Parameter | Specification |
|---|---|
| Appearance | Cream-colored powder |
| Initial melting point | 98 °C min |
| Heating loss | 0.40% max |
| Ash | 0.30% max |
| Sieve residue (150 µm) | 0.1% max |
A full specification sheet and a certificate of analysis (COA) for each batch are available on request.
Basic Information
| CAS number | 4979-32-2 |
| Synonyms | Accelerator DCBS; N,N-dicyclohexyl-2-benzothiazolesulfenamide; N,N-dicyclohexylbenzothiazole-2-sulfenamide |
| Molecular formula | C19H26N2S2 |
| Molecular weight | 346.6 g/mol |
| Type | Sulfenamide accelerator (delayed action / long scorch) |
Applications
- Thick rubber sections – large tyres, solid tyres, thick mouldings.
- Technical rubber goods – heavy belting, hoses and large industrial parts.
- Compounds needing long scorch safety – high-temperature processing or slow cures.
- NR, SBR, BR and blends – activated with zinc oxide and stearic acid.
DCBS is the most delayed of the common sulfenamide accelerators: it protects against premature cure (scorch) during processing and storage, then cures efficiently once the temperature is reached – important for thick, slow-heating parts.
Packaging and documentation
- 25 kg PP/PE bags or fibre drums; keep sealed, cool and dry.
- Per-batch certificate of analysis (COA) and safety data sheet (SDS).
PolyBlueChem supplies Accelerator DCBS (CAS 4979-32-2) to this specification, with per-batch COA and SDS, competitive pricing on bulk volumes and FOB/CIF delivery. Contact us with your tonnage and delivery port for a quotation.
