Polyolefins, such as polyethylene (PE) and polypropylene (PP), are ubiquitous in modern life, forming the backbone of countless products from packaging films and automotive parts to textiles and consumer goods. Their widespread use is due to their excellent balance of properties, cost-effectiveness, and processability. However, like all polymers, polyolefins are susceptible to degradation, particularly during high-temperature melt processing. Antioxidant 168 (CAS 31570-04-4), a highly effective phosphite processing stabilizer, is crucial for ensuring their melt stability and long-term durability.

Challenges in Polyolefin Processing
The extrusion, injection molding, and blow molding processes for polyolefins often involve temperatures exceeding 200°C. At these elevated temperatures, in the presence of oxygen and residual catalysts, polyolefins can undergo significant oxidative degradation. This degradation manifests as changes in molecular weight, leading to decreased melt strength, increased brittleness, and discoloration. These issues not only impact the processing efficiency but also compromise the final product's performance and appearance.

The Role of Antioxidant 168 in Polyolefins
Antioxidant 168 acts as a potent secondary antioxidant, specifically targeting hydroperoxides that are formed during the initial stages of polymer oxidation. By efficiently decomposing these hydroperoxides into stable, non-radical products, it effectively interrupts the degradation cycle. This action preserves the integrity of the polymer chains, preventing premature chain scission or cross-linking. The result is improved melt stability, reduced gel formation, and better color retention in the final polyolefin products.

Synergy with Primary Antioxidants
For optimal protection of polyolefins, Antioxidant 168 is almost always used in combination with primary antioxidants, such as hindered phenols (e.g., Antioxidant 1010, 1076). The primary antioxidant scavenges free radicals, while Antioxidant 168 handles the hydroperoxides. This synergistic approach offers a comprehensive shield against thermal-oxidative degradation, ensuring that the polyolefin material retains its intended properties throughout processing and its service life. Manufacturers who buy Antioxidant 168 often do so as part of a stabilizer package designed for specific polyolefin grades and applications.

Sourcing Quality Antioxidant 168 from China
When selecting a supplier for critical additives like Antioxidant 168, quality and reliability are paramount. As a leading manufacturer and supplier of Antioxidant 168 in China, we are committed to providing high-purity materials that meet stringent industry standards. Our product is recognized for its low volatility, excellent hydrolytic resistance, and superior performance when blended with other stabilizers. If you are seeking to enhance your polyolefin processing and product quality, we encourage you to inquire about our Antioxidant 168 price and bulk purchase options. Partner with us to secure a dependable supply of this essential polymer additive.