In the world of polymer manufacturing, ensuring the longevity and performance of plastic materials is paramount. One of the key challenges faced is degradation caused by oxidation, especially during high-temperature processing. This is where antioxidants play a critical role. Among the various types available, phosphite antioxidants, such as Antioxidant 168 (CAS 31570-04-4), have emerged as indispensable components for modern polymer formulations.

Understanding the Role of Antioxidants
Polymers, during their synthesis and processing, are susceptible to oxidative degradation. This process, often triggered by heat, shear, and residual catalysts, can lead to chain scission, cross-linking, and ultimately, a loss of desirable mechanical properties and aesthetic appeal. Antioxidants act by interrupting these degradation pathways. They can either scavenge free radicals (primary antioxidants) or decompose hydroperoxides, which are key intermediates in the oxidation chain reaction (secondary antioxidants).

Antioxidant 168: A Powerful Secondary Stabilizer
Antioxidant 168 is a highly effective secondary antioxidant belonging to the phosphite class. Its chemical name, Tris(2,4-di-tert-butylphenyl) phosphite, and CAS number 31570-04-4, are recognized across the industry for its exceptional performance. As a white, free-flowing powder, it is easily incorporated into polymer matrices. Its primary function is to efficiently decompose hydroperoxides formed during polymer processing, thereby preventing degradation. This makes it an invaluable co-stabilizer, often used in conjunction with primary antioxidants like phenolic stabilizers (e.g., Antioxidant 1010 or 1076). This combination offers a synergistic effect, significantly enhancing the thermal processing stability of polymers.

Key Properties and Benefits
The advantages of using Antioxidant 168 are numerous:

  • Low Volatility: This ensures that the antioxidant remains within the polymer during high-temperature processing, preventing loss and maintaining its protective function.
  • High Thermal Stability: It can withstand demanding processing temperatures without decomposing, offering reliable protection.
  • Excellent Hydrolytic Resistance: Unlike some other phosphites, Antioxidant 168 exhibits good stability in the presence of moisture, which is crucial for processing and storage.
  • Non-Discoloring: It does not contribute to discoloration, preserving the aesthetic qualities of the final product.

Applications Across Diverse Polymer Systems
The versatility of Antioxidant 168 allows its use in a wide array of polymers. It is particularly effective in:

  • Polyolefins: Including polyethylene (PE) and polypropylene (PP), where it protects against thermal degradation during extrusion and molding.
  • Engineering Plastics: Such as polyamides (PA), polycarbonates (PC), and ABS resins, enhancing their durability and processing characteristics.
  • Styrenic Polymers: Polystyrene (PS) and its copolymers benefit from its stabilization properties.
  • Rubber and Elastomers: It helps maintain the flexibility and resilience of rubber products.
  • Coatings and Adhesives: Its inclusion can improve the shelf-life and performance stability of these formulations.

Sourcing High-Quality Antioxidant 168
For manufacturers seeking a reliable supplier of Antioxidant 168, it is essential to partner with experienced companies that can guarantee purity and consistent quality. As a dedicated manufacturer and supplier of chemical intermediates and additives, we pride ourselves on offering premium-grade Antioxidant 168 at competitive prices. Understanding the critical role this additive plays in your production process, we are committed to providing excellent technical support and efficient logistics. For those looking to buy Antioxidant 168, especially in bulk quantities from China, we offer a seamless procurement experience, ensuring your polymer products meet the highest standards of performance and longevity. Reach out to us to discuss your specific needs and to obtain a quote.