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Rubber Accelerator TBBS (N-tert-butyl-2-benzothiazole sulfenamide), commonly known as TBBS or NS, is a chemical compound used in the rubber industry as an accelerator for the vulcanization of natural and synthetic rubber. It belongs to the benzothiazole sulfenamide class of accelerators, which play a crucial role in promoting the cross-linking of rubber molecules during the vulcanization process. TBBS enhances the speed of vulcanization, improves the properties of the cured rubber, and contributes to better overall performance, such as increased tensile strength and resilience.

Due to its delayed action, TBBS is often preferred in the production of tire treads, industrial rubber products, and automotive components. Its stability and effectiveness make it a widely used accelerator in the rubber manufacturing industry, contributing to the production of high-quality and durable rubber goods. Proper handling and adherence to safety guidelines are essential when working with TBBS to ensure its safe use in industrial applications.

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Functions and Characteristics


Product Specification:

Title of index Powder Granule The products after the treatment of oil
External appearance Off white to tan powder or grainy shape Off white to tan powder
Melting point ℃ min 105 105 105
Reduction at heating % max 0.4 0.4 0.4
Ash content % max 0.4 0.4 0.4
Residue on 20# sieve (900μm) % max 0.0 -4 0.0
Strength of granule N 2-8

  1. Accelerating Vulcanization: TBBS functions as a rubber accelerator, promoting the vulcanization process in the production of rubber goods. It enhances the cross-linking of rubber molecules, leading to improved strength and durability.
  2. Fast Cure: TBBS provides a fast curing rate, contributing to increased efficiency in the manufacturing process. This is particularly important in industries where rapid production is crucial.
  3. High Modulus Development: The accelerator facilitates the development of high modulus in rubber, enhancing the stiffness and strength of the final product. This is especially valuable in applications where structural integrity is paramount.
  4. Compatibility with Rubber Types: TBBS is compatible with various types of rubber, including natural rubber (NR), styrene-butadiene rubber (SBR), and butadiene rubber (BR). Its versatility makes it suitable for a range of rubber formulations.
  5. Oil Treatment Benefits: After treatment with oil, TBBS exhibits improved fineness, reducing issues related to powder and dirt. This oil treatment enhances the overall quality of the rubber compound and contributes to a cleaner and more efficient manufacturing process.
  6. Stability in Storage: TBBS remains stable during storage, ensuring that its properties are preserved over time. This stability is essential for maintaining consistent performance in rubber manufacturing processes.
  7. Solubility Profile: The accelerator shows good solubility in various organic solvents, including benzene, dichloromethane, carbon tetrachloride, ethyl acetate, acetone, and alcohol. This solubility contributes to its effective incorporation into rubber formulations.
  8. Environment Improvement: The use of TBBS, especially after oil treatment, can contribute to an improved working environment by reducing the generation of powder and dirt.

Major Applications

Oil Seals and Gaskets:

TBBS is employed in the production of rubber seals and gaskets for applications where oil resistance and sealing properties are critical, such as in automotive engines.

Vibration Isolators:

In the field of machinery and equipment, TBBS can be used in the production of rubber components for vibration isolators, contributing to shock absorption and damping properties.

  • Package

    Net weigh 25 kgs in polyethylene knitted bag or paper bag lined with polyethylene bag inside.

  • Storage

    Accelerator TBBS (NS) should not be double stacked and should be stored under cool and dry conditions in a well-ventilated area. Direct exposure to sunlight should be avoided.

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