In the pursuit of creating robust and long-lasting plastic products, the strategic selection of additives is paramount. Among these, antioxidants play a pivotal role in protecting polymers from degradation. Antioxidant 168 (CAS 31570-04-4) is a leading secondary antioxidant, renowned for its efficacy in stabilizing polymers during processing. However, its true potential is often unlocked when combined synergistically with primary antioxidants, particularly hindered phenols. This article delves into how this powerful combination enhances plastic durability and prevents yellowing.

The degradation of polymers is a complex process often initiated by free radicals formed during exposure to heat, light, or mechanical stress. Primary antioxidants, such as hindered phenols, function by scavenging these free radicals directly, thereby terminating the oxidative chain reactions. They donate a hydrogen atom to the radical, creating a stable phenoxy radical that is less reactive.

Antioxidant 168, on the other hand, acts as a hydroperoxide decomposer. During the oxidative process, unstable hydroperoxides are formed. These compounds can decompose into more reactive free radicals, perpetuating the degradation cycle. Antioxidant 168 efficiently breaks down these hydroperoxides into stable, non-radical products, thereby preventing the propagation of oxidative damage. This dual-action approach is significantly more effective than using a single type of antioxidant.

The synergy between Antioxidant 168 and hindered phenols is a cornerstone of advanced polymer stabilization. When used together, they provide comprehensive protection. The hindered phenol intercepts initial free radicals, while Antioxidant 168 cleans up the intermediate hydroperoxides. This cooperative action leads to:

  • Enhanced Thermal Stability: The combined antioxidants protect polymers from breakdown during high-temperature processing, preserving molecular weight and physical properties.
  • Prevention of Yellowing: Oxidative degradation often leads to discoloration. The combined action of these antioxidants effectively inhibits the chromophore formation, maintaining the original color of the plastic.
  • Extended Service Life: By preventing degradation at both the radical and hydroperoxide stages, the overall lifespan of the plastic product is significantly extended.
  • Improved Processing Stability: Manufacturers can achieve more consistent results and reduce batch-to-batch variation in product quality, as the polymer remains stable throughout the manufacturing process.

Antioxidant 168 is particularly valued for its low volatility and hydrolytic stability, ensuring its effectiveness throughout the product's lifecycle. Its compatibility with a wide range of polymers, including polyolefins, polycarbonates, and elastomers, makes it a versatile choice for diverse applications. Whether it’s for automotive components, packaging films, or consumer goods, the combination of Antioxidant 168 with hindered phenols offers a robust solution for achieving superior plastic durability.

NINGBO INNO PHARMCHEM CO.,LTD. recognizes the importance of synergistic additive systems. By offering high-quality Antioxidant 168, we empower manufacturers to produce plastics that not only withstand rigorous processing but also maintain their aesthetic appeal and functional integrity over extended periods, directly addressing the need for durable and reliable plastic materials in the market.