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Rubber accelerator CBS

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Rubber Accelerator CBS

Rubber Accelerator CBS (N-cyclohexyl-2-benzothiazole sulfenamide) is a widely employed chemical additive in the rubber industry. Functioning as an accelerator, CBS plays a pivotal role in the vulcanization process, expediting the cross-linking of rubber molecules to enhance the material’s strength, elasticity, and thermal stability. Its chemical structure incorporates a benzothiazole ring, imparting desirable properties to the rubber. CBS is particularly effective in promoting the curing of natural and synthetic rubber compounds, ensuring the efficient production of various rubber products.

It contributes to shorter curing times and improved mechanical properties, making it invaluable in the manufacturing of tires, conveyor belts, hoses, and other rubber goods. However, proper handling and dosage are essential to avoid over-acceleration and ensure optimal performance, reflecting the significance of CBS in the rubber industry’s pursuit of enhanced product quality and processing efficiency.


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Functions and Characteristics

  1. Accelerating Properties: CBS functions as a rubber accelerator, promoting the vulcanization process by speeding up the formation of cross-links between rubber molecules, leading to improved material strength and elasticity.
  2. Vulcanization Efficiency: This accelerator contributes to shorter curing times, enhancing the efficiency of the vulcanization process during the production of rubber goods.
  3. Thermal Stability: CBS imparts thermal stability to the rubber, ensuring that the final products can withstand a range of temperatures without significant degradation.
  4. Compatibility: It is compatible with various types of rubbers, including natural rubber and synthetic rubber compounds, making it versatile in different rubber formulations.
  5. Enhanced Mechanical Properties: The addition of CBS results in rubber products with improved tensile strength, elongation, and overall mechanical performance.
  6. Product Quality: Rubber Accelerator CBS is crucial for achieving consistent and high-quality rubber goods, ensuring reliable performance in end-use applications.
  7. Tire Manufacturing: CBS is commonly used in the production of tires, contributing to the overall performance and durability of the rubber in automotive applications.
  8. Chemical Structure: The benzothiazole ring in CBS provides a unique chemical structure that influences the curing process and imparts specific properties to the rubber.

Product Specification:

Title of index First grade Qualified Granule The products after the treatment of oil
External appearance Grayish white or light yellow powder or granule Grayish white powder
Melting point ℃ min 98.0 96.0 99.0 98.0
Reduction at heating % max 0.30 0.50 1.00 0.30
Ash content % max 0.30 0.40 0.40 0.30
Residue on 100# sieve (150μm) % max 0.05 0.10 0.0
Residue on 320# sieve (45μm) % max 0.20
Strength of granule N 2-8

Product Application:

Accelerator CBS (CZ) is an accelerator with high activity and greatly delayed action, has high scorching quality, processing safety and short cure time. Its activity can be reinforced by alkaline accelerators, for example, thiuram type and dithiocarbamate accelerators. It is suitable for all kinds of rubbers, and discolors slightly without frosting. Vulcanizate resists to aging. Both tensile strength and stress at definite elongation are good. It is mainly used in manufacture of tires, rubber tube, cable and other technical rubber goods.

Major Applications

General Molded Rubber Products:

Its versatility makes CBS suitable for a wide range of molded rubber products, contributing to accelerated vulcanization and improved mechanical properties.


CBS is sometimes utilized in rubber-based adhesive formulations, contributing to faster curing times and improved adhesive strength.

  • Package

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

  • Storage

    Should be kept in ventilated and dry place or may be descendently decomposed during storage, so should be kept in low temperature off moisture or heat and used in order periodically during storage. The period of storage stability is six months. 

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