Promoter TBSI, also known as N-tert-butyl-bis-(2-benzothiazolesulfen)amide, is a high-performance vulcanization accelerator widely used in the rubber industry. This article provides a comprehensive overview of its chemical properties, applications, and safety considerations.

Chemical Properties

Promoter TBSI is a whitish powder with a melting point range of 128.0-140.0°C. It is insoluble in water but readily soluble in organic solvents such as benzene, acetone, and toluene. Its chemical structure consists of benzothiazole groups linked by a tert-butylamine bridge, providing it with excellent vulcanization properties.

Performance

Vulcanization Accelerator: TBSI is an important sulfidizing accelerator that can prolong the scorch time and has strong flat vulcanization performance.

Non-Carcinogenic: TBSI does not produce carcinogenic nitrosamines in application, making it a safer alternative to NOBS, TBBS, and CDBS.

High Modulus and Lower Heat Generation: Rubber products using TBSI show good curing reversion resistance, high modulus, and lower heat generation, optimizing adhesion between rubber and brass-coated steel cord.

Applications

Tires: TBSI is widely used in tire manufacturing, particularly in tire treads and sidewalls, to improve static ozone resistance and flexural fatigue resistance.

Rubber Products: It is used in various rubber products such as hoses, belts, and seals to enhance their durability and resistance to environmental factors.

Thick Rubber Products: TBSI is ideal for thick rubber products requiring a balanced cure and improved reversion resistance during extended cure times at elevated temperatures.

Packaging and Storage

Promoter TBSI is typically packaged in paper/plastic bags with a net weight of 25 kg per package. It should be stored in a cool, dry place with good ventilation, avoiding direct sunlight and moisture. The product has a shelf life of one year when stored properly.

Safety and Handling

Promoter TBSI is classified as a hazardous substance with the following hazard statements:

H410: Very toxic to aquatic life with long-lasting effects.

Precautionary Statements:

P273: Avoid release to the environment.

P391: Collect spillage.

Conclusion

Promoter TBSI is a versatile and high-performance vulcanization accelerator with a wide range of applications in the rubber industry. Its improved properties, such as delayed action and high anti-scorching quality, make it particularly suitable for products requiring high performance and durability. Proper handling and storage are essential to ensure its safe and effective use