Doverphos® S-9228
Solid Phosphite Antioxidant for Elevated Temperature Processing
Doverphos® S-9228 is a high-performance solid phosphite antioxidant engineered for demanding polymer processing applications requiring excellent hydrolytic stability, low volatility, and high-temperature performance. The additive delivers effective stabilization while supporting color retention, melt flow consistency, and broad food-contact compliance across a wide range of polymer systems.
Why Choose Doverphos® S-9228
Doverphos® S-9228 helps polymer manufacturers improve processing performance in demanding high-temperature applications where hydrolytic stability, low volatility, and color retention are critical. Its solid phosphite chemistry supports consistent stabilization performance during extrusion, compounding, and other elevated temperature processing operations while helping manufacturers maintain product quality and regulatory compliance across a wide range of polymer systems.
Excellent Hydrolytic Stability
High Temperature Performance
Broad Food Contact Approvals
Low Volatility
Color Stability
Non-NIAS Positioning
Where Doverphos® S-9228 Performs
Doverphos® S-9228 supports a broad range of extrusion, compounding, and elevated temperature processing applications across polyolefin and engineering thermoplastic markets. The additive is compatible with multiple polymer systems and helps manufacturers maintain processing performance, color stability, and regulatory compliance under demanding thermal and processing conditions.
Applications
- Polymer Processing
- Compounding
- Extrusion
- High-Temperature Processing
- Wire & Cable
- Engineering Resins
- Food and Beverage Packaging
- Film Applications
Functions
- Secondary Antioxidant
- Hydroperoxide Decomposition
- Processing Stabilization
- Color Protection
- Melt Flow Retention
- Hydrolytic Stability Enhancement
- Thermal Stabilization
Materials
- HDPE
- LLDPE
- Polypropylene (PP)
- Engineering Thermoplastics
- Polyolefin Blends
- Masterbatch Systems
Product Overview
Doverphos® S-9228 is a free-flowing solid phosphite antioxidant developed for demanding polymer processing applications requiring excellent hydrolytic stability and high-temperature performance. The additive functions as a secondary antioxidant, decomposing hydroperoxides formed during melt processing to help protect polymers from thermal oxidation, melt flow degradation, and color formation.
Its high melting point and low volatility make Doverphos® S-9228 particularly well suited for extrusion, compounding, and other elevated temperature processing environments. The product exhibits excellent color stability comparable to other pentaerythritol diphosphites while delivering broad food-contact compliance across multiple polymer systems.
Doverphos® S-9228 is engineered without the addition of inert products or triisopropanolamine and offers strong hydrolytic stability under demanding processing conditions.
Elevated Temperature Processing
Doverphos® S-9228 is designed for polymer processing applications operating under demanding thermal conditions. Its high melting point and low volatility help maintain stabilization performance during extrusion, compounding, and other elevated temperature operations where conventional phosphites may experience increased volatility or degradation.
Hydrolytic Stability
Doverphos® S-9228 exhibits excellent hydrolytic stability without the addition of inert products or triisopropanolamine. The additive maintains performance under challenging heat and humidity conditions, supporting more consistent processing performance and long-term formulation stability.
Food Contact & Regulatory
Doverphos® S-9228 has broad global food-contact approvals across multiple polymer systems. The oxidative and potential hydrolysis products are included on European food registrations and are considered non-NIAS, supporting formulation strategies focused on regulatory compliance and product stewardship.
Technical Overview
The following properties provide a general overview of the product’s physical characteristics and chemical profile.
| Property | Value |
|---|---|
| Chemical Family | Phosphite Antioxidant |
| Chemical Name | Bis (2,4-dicumylphenyl) pentaerythritol diphosphite |
| CAS # | 154862-43-8 |
| Physical Form | Free Flowing Powder |
| Appearance | Off-White |
| Phosphorus, % | 7.3% |
| Alkylphenol Content | None |
| Volatility Profile | Low Volatility |
Compliance & Performance Advantages
Doverphos® S-9228 supports global food-contact compliance, non-NIAS-focused formulation strategies, and reliable stabilization performance in demanding high-temperature polymer processing applications. Its excellent hydrolytic stability and low volatility help manufacturers maintain consistent processing performance while supporting product quality, processing consistency, and regulatory objectives.
Technical Resources & Supporting Documentation
Access technical documentation, regulatory information, and application resources. These materials are designed to help manufacturers evaluate performance, support formulation development, and streamline product qualification processes.
- Data Sheet
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