Antioxidant 245 | A high-performance hindered phenol primary antioxidant that safeguards polymer processing and ensures long-lasting resistance to aging

During high-temperature processing, long-term storage, and outdoor use, polymers are highly susceptible to thermal oxidation degradation caused by heat, oxygen, and light exposure. This leads to issues such as yellowing, reduced mechanical strength, surface defects, and a shortened service life, which severely impact product quality and market reputation. To address the problem of material oxidation and aging at its source, a primary antioxidant with broad compatibility, high stability, and outstanding functionality is essential. As a classic and highly effective hindered phenolic primary antioxidant for organic polymers, Antioxidant 245 has become the preferred anti-aging additive for a wide range of polymer materials—including styrene, engineering plastics, rubber, polyurethane, and PVC—thanks to its excellent processing stability, color protection, resistance to leaching, and unique additive functions. It comprehensively enhances material processing quality and extends the service life of finished products.

Core Positioning: High-Efficiency Primary Antioxidant, Dual Protection for Processing and End-Use

Antioxidant 245 is a high-quality hindered phenolic primary antioxidant. Its core function is to efficiently capture free radicals generated by polymer oxidation reactions, interrupt oxidative chain reactions, and suppress the thermal oxidative degradation of polymer materials at its source. Unlike ordinary antioxidants, it provides dual protection—both during processing and against long-term weathering. It effectively prevents thermal-oxidative aging, yellowing, and degradation during high-temperature processing such as injection molding, extrusion, and polymerization, ensuring processing and molding stability. It also continuously safeguards the performance and appearance stability of end products during long-term use, making it suitable for both industrial mass production and high-end finished product applications.

Compatible with a Full Range of Substrates, Covering Mainstream Polymer Material Systems

This product offers exceptional substrate versatility, compatible with the vast majority of general-purpose plastics, engineering plastics, synthetic rubbers, and polymer additive systems. With its comprehensive compatibility across categories, it provides a one-stop solution for multi-category production needs, simplifying a company’s formulation portfolio:

In the general-purpose materials sector, it is compatible with styrene-based materials, PVC (rigid/flexible), MBS, and other substrates; In the engineering plastics sector, it is fully compatible with high-performance materials such as polyoxymethylene (POM) homopolymers/copolymers, polyurethane (PU), polyamide (PA), and polyester (PET); it is also widely applicable to various synthetic rubber products, supporting the production of extended products such as rubber-plastic composites, elastomers, adhesives, and seals. Its application scenarios span multiple fields, including general industrial goods, high-end engineering products, and outdoor products.

Differentiated Core Performance: Overcoming the Shortcomings of Traditional Antioxidants

Compared to traditional hindered phenol antioxidants, Antioxidant 245 overcomes performance limitations and delivers comprehensive upgrades in stability, applicability, and quality details, creating a unique competitive advantage.

1. Low volatility, resistance to leaching, and extremely low processing loss

The product exhibits excellent low-volatility properties and is not prone to volatilization or loss in high-temperature processing environments, effectively preventing protection failure caused by additive loss. At the same time, it demonstrates outstanding resistance to extraction; during the use of finished products, it is not easily extracted by water or solvents, resulting in no blooming or migration contamination. It remains stable in the material system over the long term, providing sustained antioxidant protection and significantly extending the service life of the products.

2. Excellent color stability, eliminating yellowing defects

Addressing the industry-wide challenges of material yellowing during processing and subsequent discoloration, Antioxidant 245 offers outstanding color-preserving capabilities. It does not cause material discoloration during processing and effectively maintains the product’s original color over the long term. It is particularly well-suited for the production of white, light-colored, and transparent polymer products, perfectly resolving quality issues such as yellowing, dulling, and color discrepancies.

3. Dedicated polymerization aid function, optimizing PVC/ABS processing quality

This is the core advantage of Antioxidant 245! During the polymerization and processing of PVC and ABS materials, it acts as a highly efficient chain terminator, precisely terminating reactive groups in the polymerization reaction and stabilizing the molecular structure of the material. Additionally, in the production of flexible PVC, it effectively suppresses and reduces the formation of fish-eye defects, improving the surface finish and yield rate of the finished products. By optimizing product quality at the processing stage, it reduces production waste and associated costs.

Superior Synergistic Compatibility, Building a Comprehensive Weather-Resistant Protection System

Antioxidant 245 exhibits exceptional compatibility and can be perfectly blended with various additives to achieve synergistic effects, meeting the formulation design requirements for high-end weather-resistant products. For polymer products intended for long-term outdoor use, it can be combined with benzotriazole-based UV absorbers and hindered amine light stabilizers to establish a dual-protection system against “thermo-oxidative aging and UV aging.” This comprehensively defends against material damage caused by sunlight, high temperatures, and oxidation, significantly enhancing the weather resistance and aging resistance of outdoor products.