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BHC Polymer Additives Co., Ltd / Shanghai Crystal Wells Chemical New Materials Co., Ltd.
CBS (CZ), TBBS (NS) and MBS (NOBS) are the three most common sulfenamide delayed-action accelerators. This guide compares cure kinetics, scorch safety and applications to help you choose.
Cure & Scorch Profile
CBS gives moderate scorch delay and good cure; TBBS offers faster cure and slightly less scorch safety; MBS (NOBS) cures fastest but has shorter scorch time—handle with care due to nitrosamine concerns.
CBS(CZ)-80
Comparison at a Glance
See the selection table below for active content, cure speed, scorch safety, typical dosage and main applications.
| Grade | Active content | Cure speed | Scorch safety | Typical dosage | Main applications |
| CBS (CZ) | ≥ 80% | Good, balanced | Moderate scorch delay | 0.5–1.5 phr | Tire treads, general molded goods |
| TBBS (NS) | ≥ 80% | Faster than CBS | Slightly less than CBS | 0.5–1.5 phr | Tire treads, general molded goods |
| MBS (NOBS) | ≥ 80% | Fastest | Shortest, scorch-sensitive | 0.5–1.2 phr | Fast-curing profiles, where regulations allow |
Selection Tips
For tire treads and general molded goods, CBS or TBBS are standard. For fast-curing profiles needing shorter cure time, MBS may be considered where regulations allow. Always pair with a thiuram/dithiocarbamate secondary accelerator when higher activity is needed.
TBBS(NS)-80
TDS / Technical Data Sheet
| Note | Values are typical; confirm with TDS of specific grade. |
| CBS (CZ) | Delayed-action, balanced, 0.5–1.5 phr |
| TBBS (NS) | Faster cure, 0.5–1.5 phr |
| MBS (NOBS) | Fastest cure, scorch-sensitive, 0.5–1.2 phr |
NOBS-80
SDS Highlights
All sulfenamides: follow GHS hazard statements on individual SDS. Avoid dust inhalation; store cool and dry, away from acidic/alkaline materials.
COA Sample
| Grade | CBS-80 / TBBS-80 / MBS-80 |
| Appearance | Light-gray to off-white granules |
| Active assay | ≥ 80% |
| Loss on drying | ≤ 0.5% |
| Result | Conforms |
Order Information
| Packaging | 25 kg kraft bag with PE liner (per grade) |
| MOQ | 500 kg |
| Shipping port | Shanghai / Ningbo, China |
