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Rubber Accelerator TBSI

Chemical Name: N,N-bis(1,3-benzothiazol-2-ylsulfanyl)-2-methylpropan-2-amine

Molecular Formula C18H17N3S4

Molecular Weight  403.61

CAS No.  3741-80-8

Specifications  Q/KS167-2012

Items Specifications
AppearanceLight-white powder
Initial Melting Point               ℃ Min128
Heat Loss                                  % Max0.50
Ash                                             % Max0.50
Residue on 150μm Sieve        %max0.1

 Description TBSI can replace NOBS which is carcinogenic and does not generates

the nitrosamines as primary amine-based accelerator . The rubber added with TBSI can

obtain good scorch safety and lower vulcanization rate, and show good curing reversion

resistance, high modulus and lower heat generation, which optimizes adhesion between

rubber and brass coated steel cord. Its physical properties and dynamic properties of cured

rubber are similar with NOBS and DCBS cured rubber. It can also replace the blend of primary

amine accelerator TBBS or CBS and scorch retarder CTP and be used alone, which makes

it ideal for thick articles requiring a balanced cure and provides improved reversion

resistance both during extended cure times at elevated temperatures and during product

service life.

Dosage:      NR: 0.5 – 1.5 phr   IR: 0.5 – 1.5 phr  SBR: 0.5 – 1.5 phr

NBR: 0.5 – 1.5 phr  HNBR: 0.5 – 1.5 phr

Applications  This product will not generate the carcinogenic substance- nitrosamines which be

known more secure from NOBS, DIBS and DCBS under the same operation temperature.

It can be used in NR, SBR, Butadiene rubber and IR. Especially apply to the furnace

black sizing material with strong acid, showing the much better activity than CBS and


Storage      The product should be stored in the dry and cooling place with good ventilation,avoiding

exposure of the packaged product to direct sunlight.

Packing    In 25kg paper bags with plastic inner.

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