Product Center
YanjiFirst TBzTD-75
Phone: 0750-6680778
Product Description
Pain point you may have faced
TMTD is a fast, efficient thiuram accelerator, but it generates nitrosamine carcinogens during vulcanization – a growing compliance risk under REACH and Germany’s TRGS 552. You have tried other alternatives, but they often scorch too quickly, or they fail to match the cure speed and crosslink density of TMTD. In specialty applications like PVC rubber or chloroprene (CR) compounds, you also need a thiuram that offers controlled delay and safe processing.
Why TBzTD‑75 is different
First® TBzTD‑75 (tetrabenzylthiuram disulfide) is a fast‑acting vulcanization accelerator and sulfur carrier for natural and synthetic rubber, designed as a direct replacement for TMTD. Crucially, no nitrosamine carcinogens are generated or released during vulcanization – fully compliant with German TRGS 552 and other nitrosamine regulations. Compared to TMTD‑75, TBzTD‑75 provides a significantly longer scorch time, giving you a wider processing safety window without sacrificing cure speed.
Additional application advantages
PVC rubber inhibitor – occasionally used to control vulcanization of PVC rubber compounds.
Delayed‑action agent for CR – when combined with ETU‑75 in mercaptan‑modified chloroprene rubber, TBzTD‑75 acts as a safe retarder, preventing premature crosslinking.
What you gain
Drop‑in replacement for TMTD – similar activity, same dosage range.
No nitrosamines – pass REACH, TRGS 552, and factory audits with ease.
Longer scorch safety – reduce scrap from premature curing, especially in hot climates or long storage.
Versatile – works in thiuram‑accelerated systems as well as in speciality PVC and CR recipes.
Real‑world result
A manufacturer of rubber‑to‑metal bonded parts used TMTD as a secondary accelerator. Facing an EU customer’s nitrosamine ban, they switched to First® TBzTD‑75 at the same 0.3 phr level. Scorch time increased by 35%, cure time remained virtually unchanged, and physical properties (tensile, modulus) were equal or slightly better. The customer passed the nitrosamine test with zero detection, and the bonding strength to brass remained excellent.
Typical specifications
Appearance: off‑white to light yellow granules
Active ingredient: tetrabenzylthiuram disulfide (approx. 75%)
Carrier: EPDM
Recommended dosage: 0.1–0.5 phr (as secondary accelerator or sulfur donor)
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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http://www.rubberaccelerator.net/
Guozhou Industrial Park, Zhongtang Town, Dongguan, Guangdong, China
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