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First TBBS(NS)-80
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- Chemical composition: N-tert-Butyl-2-benzothiazole sulfonamide
- Complex carrier: EPDM/SBR
- Characteristics: Post-effect accelerators for natural rubber, synthetic rubber, and reclaimed rubber—particularly well-suited for carbon black compounds with high alkalinity. They ensure safety at processing temperatures, exhibit excellent scorch resistance, promote rapid vulcanization, deliver high tensile strength, and allow for increased incorporation of synthetic rubber. Importantly, these accelerators do not generate nitrosamines, the carcinogenic byproducts typically associated with vulcanization, making them an ideal NOBS replacement while also offering outstanding overall performance—they’re often referred to as the "standard accelerator." Additionally, they can be used in combination with thiazole, guanidine, and aldehyde-amine accelerators to enhance activity, and when paired with the scorch inhibitor PVI, they form a highly effective vulcanization system.
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- Product Description
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Pain point you may have faced
You rely on NOBS for its delayed action and safe processing, but NOBS generates nitrosamines – a growing concern for regulators and OEMs. Switching to a different accelerator often means giving up scorch safety or vulcanization speed. You need a drop‑in replacement that delivers the same performance without the health risk, especially in high‑alkalinity carbon black compounds.Why TBBS‑80 (NS‑80) is different
First® TBBS‑80 is a post‑effect accelerator for natural rubber, synthetic rubber, and reclaimed rubber – particularly well‑suited for carbon black compounds with high alkalinity. It provides excellent scorch resistance and processing safety, yet once the vulcanization temperature is reached, it cures rapidly. Importantly, no nitrosamine carcinogens are generated during vulcanization, making TBBS‑80 the ideal replacement for NOBS. In fact, it is widely recognized as the “standard accelerator” due to its outstanding all‑round performance.What you gain
Safe at processing temperatures – wide scorch safety window.
Fast cure speed – no compromise on productivity.
High tensile strength – fully comparable to NOBS‑cured compounds.
Allows increased synthetic rubber loading – more formulation flexibility.
Compatible – can be used with thiazole, guanidine, or aldehyde‑amine accelerators to boost activity, and with PVI to build a highly effective vulcanization system.
Real‑world result
A tire tread compound manufacturer using NOBS needed to pass a REACH nitrosamine audit. They switched to First® TBBS‑80 at the same dosage (1 phr). Scorch time remained virtually unchanged, cure speed even increased slightly, and tensile strength was within 1% of the original. The compound passed the nitrosamine test with zero detection, and the customer continued using the same mixing and molding process without any adjustments.Typical specifications
Appearance: off‑white to light gray granules
Active ingredient: N‑tert‑butyl‑2‑benzothiazole sulfenamide (approx. 80%)
Carrier: EPDM
Recommended dosage: 0.5–2 phr (as primary accelerator)
Packaging: 25 kg carton with inner PE liner
Storage: 12 months in unopened packaging, cool and dry
Samples and technical data sheets are available. No hard selling — just for your evaluation.
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