WESTCO™ MBTS Accelerator Benzothiazole disulfide CAS# 120-78-5

WESTCO™ MBTS accelerator for rubber is a general purpose accelerator for sulfur cures. It is very active above 142°C (287°F). Unlike thiuram disulfides, WESTCO™ MBTS does not split off active sulfur during vulcanization. For use in natural and synthetic rubber processing. WESTCO™ MBTS has a higher critical temperature than MBT, preventing early-cure and scorching. To conduct processing safely, it is recommended that MBTS accelerator be used in combination with basic accelerators such as TMTD.


Appearance: Cream/Light yellow

Granular, Powder, Oiled Powder

Melting Point, °C

*165 min, *165 min, *165 min

Moisture, %

*.5 max , *.5 max , *.5 max

Ash content, %

*.5 max , *.5 max , *.5 max

Content of Oil, %

NA , NA , *1-2

Specific Gravity, typical

1.55, 1.55, 1.55

Residue on 100 mesh, %

NA , *0.10 max, *0.10 max

Grain Strength

*1.5 to 4.0N, NA, NA

Free MBT, %

2.0 max, 2.0 max, 2.0 max

Assay, %

95.0 min, 95.0 min, 95.0 min

* Actual MBTS accelerator for rubber tech data / technical will be reported on Certificate of Analysis

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      • Western Reserve Chemicals
      • 4837 Darrow Road
      • Stow, OH 44224

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