For formulators and engineers in the rubber industry, a deep understanding of the chemical properties of additives is essential for optimizing product performance. Rubber Antioxidant 6PPD (CAS: 793-24-8), known chemically as N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, is a key component in many rubber formulations. As a specialized chemical supplier, we provide detailed insights into its characteristics, helping you leverage its full potential in your applications.

The molecular formula of 6PPD is C18H24N2, with a molecular weight of 268.40 g/mol. Physically, it typically appears as grayish-purple to purplish-brown flakes or granulars. Its melting point is usually in the range of 45-46°C, with a crystallization point of approximately 45.5°C. These physical properties are important for handling and processing, ensuring it can be effectively incorporated into rubber compounds.

Chemically, 6PPD belongs to the p-phenylenediamine class of antioxidants. Its primary function is to protect rubber materials from degradation caused by oxidation and ozone. The molecule's structure allows it to readily react with ozone and oxygen free radicals, thereby preventing chain scission and cross-linking reactions that compromise the rubber's mechanical properties. This makes it particularly effective as an antiozonant, safeguarding against surface cracking induced by atmospheric ozone.

Solubility is another critical property. 6PPD is soluble in methanol and other organic solvents but has low solubility in water. This characteristic is advantageous as it minimizes the loss of the antioxidant from the rubber matrix when exposed to water or moisture, ensuring prolonged protective action. The reported wash loss rate being significantly lower than some alternatives underscores this benefit.

In terms of stability, 6PPD is sensitive to prolonged exposure to air and should be protected from strong oxidizing agents. Its flash point is around 204°C, indicating it is combustible but requires considerable heat to ignite. Storage should be in a cool, dry, dark place to maintain its efficacy.

The synthesis of 6PPD typically involves reactions like the condensation of 4-methyl-2-pentanone with 4-aminodiphenylamine. Its preparation involves careful control of reaction conditions to ensure high purity and yield. Understanding these chemical behaviors allows manufacturers to optimize compounding processes and predict performance under various conditions. For companies looking to buy 6PPD, consulting with experienced suppliers can provide valuable guidance on its chemical behavior in specific formulations.

As a trusted supplier of Rubber Antioxidant 6PPD in China, we are committed to providing high-quality products with detailed technical specifications. We can assist you in understanding how 6PPD's chemical properties can best serve your application needs, whether it's for tire manufacturing or other demanding industrial rubber products. Contact us for a quote and detailed product information to ensure you are using the most effective solutions.