For tire tread compounds, the accelerator must balance fast cure, scorch safety and regulatory compliance. This guide focuses on TBzTD-70 masterbatch as a low-nitrosamine alternative to TMTD/TT in NR, SBR and BR-based tire treads.

Why low-nitrosamine matters

During vulcanization, thiuram accelerators can form N-nitrosamines, which are of concern under EU regulations. TBzTD (tetrabenzylthiuram disulfide) releases significantly lower nitrosamine levels, making it a preferred choice for export-oriented tire makers.

Recommended dosage

Typical use level is 0.5–1.5 phr, often in combination with a sulfenamide primary accelerator (CBS/NS or TBBS/NS) at 0.8–1.5 phr. Final dosage should be determined by laboratory cure rheometry.

Applications

Passenger and truck tire treads, retread compounds, and other NR/SBR/BR-based profiles requiring improved vulcanizate properties.

TDS / Technical Data Sheet

Active content	TBzTD 70% min.
Binder	EPDM / EPM carrier
Appearance	Light-yellow granules, dust-free
Mooney viscosity	≤ 60 ML (1+4) @ 100°C (typical)

SDS Highlights

Classification per GHS: Hazard statements H302, H315, H319. Use PPE, avoid dust inhalation. Store in a cool, dry, well-ventilated place away from heat and incompatible materials.

COA Sample

Batch No.		TBZ-2026-0741
Active assay		70.3%
Loss on drying		0.4%
Granule size		≤ 3 mm, ≥ 95%
Result		Conforms
Recommended dosage	Typical use level is 0
Packaging	25 kg kraft bag with PE liner, palletized; 1 MT per pallet (typical)
MOQ	500 kg
Shipping port	Shanghai / Ningbo, China
Tags / keywords	TBzTD-70, low nitrosamine, tire tread, masterbatch