Accelerator MBTS(DM)

Product name: MBTS(DM)
Chemical name: Dibenzothiazole disulfide
Structure:

CAS No.: 120-78-5

Specification:

Item	Granular	Powder	Oil powder
Appearance	Pale yellow or white granular	Pale yellow or white powder	Pale yellow or white oily powder
Initial melting point [≥ °C]	165	165	165
Loss on drying [≤ %]	0.40	0.40	0.40
Ash content [≤ %]	0.30	0.30	0.30
Residue on 100 mesh sieve [≤ %]	–	0.5	–
Granular diameter [mm]	1.5-3	–	–
Broken strength [N]	2-5	–	–
Oil content [%]	–	–	1.0-2.0

What is MBTS?
MBTS (Dibenzothiazyl disulfide) is an important accelerator used in the vulcanization of both natural and synthetic rubber. It can function either as a primary or as a secondary accelerator and is widely applied in general-purpose rubber formulations. Known for its moderately fast and flat curing characteristics, MBTS provides better scorch safety than MBT and is appreciated for its non-staining and non-discoloring properties, making it suitable even for white or light-colored rubber products.

Properties:
Has a slightly bitter taste. Specific gravity ranges from 1.50 to 1.59. It is soluble in chloroform, toluene, benzene, and carbon tetrachloride, but insoluble in water and ethyl alcohol.

Applications:
Provides flat and moderately fast curing in NR and SR and is also suitable for various general-purpose rubber products. It is non-staining and does not cause discoloration, making it suitable for “white” rubber goods. It can be used as a plasticizer or retarder in polychloroprene rubber. For synthetic polymers, it typically requires secondary accelerators. Offers better scorch safety compared to MBT.

Packaging:
Supplied in 25 kg bags.

Storage:
Store in a tightly sealed container in a cool, well-ventilated area. Under normal storage conditions, the maximum recommended shelf life is 1 year.