Antioxidant 168, identified by CAS number 31570-04-4, is a vital component in the polymer industry, serving as a highly effective secondary antioxidant. Its unique chemical structure and properties make it indispensable for enhancing the stability and longevity of a wide range of plastic and rubber materials. This article explores the key attributes, diverse applications, and market significance of Antioxidant 168.

Chemically, Antioxidant 168 is a phosphite ester. Its molecular formula is C42H63O3P, and it typically appears as a white powder. A critical characteristic is its low volatility, which ensures it remains within the polymer matrix during high-temperature processing. This low volatility, coupled with excellent hydrolytic stability, means that Antioxidant 168 offers sustained protection against oxidative degradation without significant loss or breakdown even in humid conditions.

The primary function of Antioxidant 168 is to act as a hydroperoxide decomposer. During polymer processing and subsequent use, polymers are susceptible to oxidation, a process that generates hydroperoxides. These hydroperoxides are unstable and can decompose into free radicals, initiating chain reactions that degrade the polymer. Antioxidant 168 intercepts these hydroperoxides, converting them into stable alcohols, thereby preventing further oxidative damage. This makes it an excellent processing stabilizer.

One of the most significant advantages of Antioxidant 168 is its synergistic effect when paired with primary antioxidants, such as hindered phenols (e.g., Antioxidant 1010, 1076). While primary antioxidants scavenge free radicals, Antioxidant 168 targets hydroperoxides. This combined action provides a more robust and comprehensive protection against thermo-oxidative degradation than either antioxidant could offer alone. This synergistic pairing is crucial for applications requiring extended service life and resistance to harsh processing conditions.

The applications of Antioxidant 168 are extensive and span across various polymer types. It is widely used in:

  • Polyolefins: Including polyethylene (PE) and polypropylene (PP), where it prevents degradation during extrusion, molding, and recycling.
  • Engineering Plastics: Such as polycarbonate (PC), polyamide (PA), and ABS, enhancing their thermal stability and preventing yellowing.
  • Elastomers: Protecting materials like SBR and EPDM from oxidation, thereby maintaining their flexibility and mechanical properties.
  • Adhesives and Coatings: Improving the long-term performance and stability of these materials.

The market for Antioxidant 168 is driven by the increasing demand for high-performance plastics with enhanced durability and aesthetic appeal. As industries focus on sustainability and product longevity, the role of effective stabilizers like Antioxidant 168 becomes even more critical. Its ability to prevent discoloration, maintain mechanical properties, and extend product life positions it as a key additive in the chemical auxiliary market.

NINGBO INNO PHARMCHEM CO.,LTD. is a trusted supplier of high-quality chemical intermediates and additives, including Antioxidant 168. Our commitment to excellence ensures that manufacturers have access to reliable components that contribute to the superior performance and durability of their polymer products, meeting the stringent demands of today's global markets.