77PD (4030), also known as N,N'-bis(1.4-dimethylpentyl)-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

77PD (4030) is a brownish red oily liquid with a molecular weight of 304.51 g/mol. It has excellent static ozone resistance and can improve flexural fatigue resistance in rubber materials. Due to its high solubility in rubber, it does not easily bloom or precipitate even at high concentrations.

Performance

Static Ozone Resistance: 77PD has superior static ozone resistance compared to other antioxidants like 4010NA.

Flexural Fatigue Improvement: It enhances the resistance to flexural fatigue in rubber products.

Catalytic Oxidation Protection: 77PD provides protection against the catalytic oxidation of copper, manganese, and other variable-valent metals.

Applications

Rubber Products: 77PD is suitable for rubber materials that require long-term static anti-ozone protection, such as aircraft tires, engineering tires, agricultural tires, hoses, and gaskets.

Fuels: It can be used as an antioxidant for fuels.

Polymerization Inhibitor: In the production of styrene monomer, p-methylstyrene, divinylbenzene, and acrylate, 77PD can act as a polymerization inhibitor.

Packaging and Transportation

Packaging: 77PD (4030) is typically packaged in galvanized iron drums, with each drum weighing 170 kg.

Transportation Conditions: It should be transported in clean, covered vehicles, avoiding direct sunlight, rain, and long-term compression, and kept away from heat sources.

Safety and Handling

77PD (4030) is classified as a hazardous substance with the following hazard statements:

H302: Harmful if swallowed.

H315: Causes skin irritation.

H319: Causes serious eye irritation.

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

77PD (4030) 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 odor and volatile organic compounds (VOCs), make it particularly suitable for products with higher environmental and performance standards. However, due to environmental concerns related to its byproducts, ongoing research and regulatory attention are focused on optimizing its use and mitigating potential impacts.