Engineering plastics, such as polycarbonate (PC), polyamide (PA), and acrylonitrile butadiene styrene (ABS), are favored for their superior mechanical strength, thermal resistance, and dimensional stability, making them ideal for demanding applications in automotive, electronics, and construction. However, these high-performance materials also require robust protection against degradation during processing and throughout their service life. Antioxidant 168 (CAS 31570-04-4) emerges as a critical additive in this regard.

Antioxidant 168, a phosphite ester, functions as a secondary antioxidant, primarily by decomposing hydroperoxides. Engineering plastics often undergo significant thermal stress during manufacturing processes like extrusion, injection molding, and blow molding. This thermal stress can lead to the formation of hydroperoxides within the polymer matrix, which can then initiate free radical chain reactions that degrade the polymer. Antioxidant 168 efficiently breaks down these hydroperoxides into stable products, thereby halting the degradation cycle.

The key benefits that Antioxidant 168 brings to engineering plastics include:

  • Improved Thermal Processing Stability: Engineering plastics are processed at higher temperatures than commodity plastics. Antioxidant 168 provides crucial protection against thermal degradation during these demanding conditions, preventing molecular weight changes and maintaining melt viscosity.
  • Prevention of Discoloration: Many engineering plastics are used in applications where color stability is critical. Antioxidant 168 effectively inhibits the formation of chromophores associated with oxidative degradation, ensuring that the plastic retains its original color and appearance.
  • Enhanced Long-Term Stability: Beyond processing, Antioxidant 168 contributes to the long-term thermal-oxidative stability of the finished product. This is particularly important for components exposed to elevated temperatures during use, extending their functional lifespan.
  • Synergistic Protection: When used in combination with primary antioxidants, such as hindered phenols, Antioxidant 168 offers a comprehensive stabilization package. This synergistic approach provides superior protection against both free radical attack and hydroperoxide-induced degradation, leading to significantly improved material performance.

The versatility of Antioxidant 168 allows it to be integrated into various formulations for PC, PA, ABS, and other engineering plastics. Its ability to maintain mechanical properties, prevent yellowing, and withstand thermal stress makes it an invaluable additive for manufacturers aiming to produce high-quality, durable components.

NINGBO INNO PHARMCHEM CO.,LTD. is committed to supporting the advancement of material science by providing essential chemical additives. Our supply of Antioxidant 168 enables manufacturers of engineering plastics to achieve the high performance and durability required by today's competitive markets, ensuring their products deliver on quality and longevity.