Rubber accelerator MBTS

CAS No.

120-78-5

Synonyms

DM; Dibenzothiazyl disulfide; 2,2′-Dithiobis(benzothiazole); also listed as Rubber Accelerator MBTS (DM)

Molecular formula

C14H8N2S4

Molecular weight

332.47 g/mol

Grade

Industrial grade

Packaging

Sealed PE bag / Kraft paper bag with PE liner
SKU FM-217 Category

Chemical Product Description & Applications

MBTS, or dibenzothiazyl disulfide, is a benzothiazole accelerator used in sulfur vulcanization of diene rubbers. It promotes formation of the sulfur network and helps control the balance between processing time and cure development. It can also serve as a primary accelerator in combinations with faster secondary accelerators.

The selected powder is the conventional DM accelerator, rather than a sulfenamide such as CBS. Its cure response depends on sulfur level, activators and co-accelerators, allowing formulators to adjust scorch behavior and the resulting network. It is used in natural rubber and suitable synthetic-diene rubbers, where the accelerator changes vulcanization chemistry without replacing sulfur or the complete cure package.

Typical Applications

  • Molded industrial rubber goods: Used in sulfur-cure packages for suitable natural-rubber and synthetic-rubber molded articles where processing safety and cure development must be balanced.
  • Hoses and rubber footwear components: Used in appropriately designed vulcanization systems for extruded or molded compounds requiring consistent cure behavior.
  • Combined accelerator packages: Used with compatible secondary accelerators to adjust cure rate and network formation in diene-rubber compounds.

Specifications

Parameter Specification Test Method
Appearance Pale yellow to cream powder or granules Visual inspection
Identification Consistent with authenticated reference FTIR fingerprint comparison
Initial melting point ≥165 C Capillary melting method
Assay ≥95.0% w/w Calibrated HPLC
Loss on drying ≤0.50% w/w Low-temperature vacuum gravimetry
Ash ≤0.30% w/w Gravimetric ignition residue

Specifications describe the standard grade. Tolerance, test method and documentation package are confirmed per order.

Documents & Handling

Packaging

Sealed PE bag / Kraft paper bag with PE liner

What You Get With This Product

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CoA

Certificate of Analysis

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TDS

Technical Data Sheet

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SDS

Safety Data Sheet

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