TBBS (NS), also known as N-(1.3-Dimethylbutyl)-N'-phenyl-p-phenylenediamine, is a high-performance antioxidant and anti-ozonant widely used in the rubber industry. This article provides a comprehensive overview of its chemical properties, applications, and safety considerations.

Chemical Properties

TBBS (NS) is a yellowish-brown solid with a melting point of 100-105°C and a boiling point of 260°C. It is insoluble in water but readily soluble in organic solvents such as benzene, acetone, and toluene. Its chemical structure consists of a phenyl group and a dimethylbutyl group linked by a phenylenediamine bridge, providing it with excellent antioxidant and anti-ozonant properties.

Performance

Antioxidant and Anti-Ozonant: TBBS (NS) effectively protects rubber compounds from thermal and oxidative degradation, as well as ozone cracking.

Low Volatility: It has low volatility and minimal odor, making it suitable for use in various rubber formulations.

Compatibility: TBBS (NS) is compatible with a wide range of rubber types, including natural rubber (NR), styrene-butadiene rubber (SBR), and nitrile rubber (NBR).

Applications

Tires: TBBS (NS) 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.

Plastics: TBBS (NS) can also be used as a stabilizer in plastics to prevent thermal and oxidative degradation.

Packaging and Storage

TBBS (NS) is typically packaged in 25 kg paper bags lined with plastic film or in kraft paper bags. 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

TBBS (NS) is classified as a hazardous substance with the following hazard statements:

H302: Harmful if swallowed.

H315: Causes skin irritation.

H319: Causes serious eye irritation.

H410: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment.

Precautionary Statements:

P261: Avoid breathing dust/fume/gas/mist/vapors/spray.

P280: Wear protective gloves/protective clothing/eye protection/face protection.

P305 + P351 + P338: If in eyes: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing.

P333 + P313: If skin irritation or rash occurs: Get medical advice/attention.

Conclusion

TBBS (NS) is a versatile and high-performance chemical compound with a wide range of applications in the rubber and plastics industries. Its improved properties, such as reduced volatility and excellent antioxidant and anti-ozonant performance, make it particularly suitable for products requiring high durability and resistance to environmental factors. Proper handling and storage are essential to ensure its safe and effective use.