Antioxidant 168 (Phosphite Co-Antioxidant)
CAS Number: 31570-04-4
Antioxidant 168 (tris(2,4-di-tert-butylphenyl)phosphite) is a high-performance phosphite processing stabilizer that hydroperoxide decomposer, preventing discoloration and degradation of polyolefins and engineering polymers during melt processing. It works synergistically with hindered phenolic antioxidants to provide comprehensive protection against thermal and oxidative degradation. Antioxidant 168 is one of the most widely used co-antioxidants in the plastics industry.
Technical Specifications
| appearance | White powder |
| purity (%) | ≥98.0 |
| ash content (%) | ≤0.1 |
| melting point (°C) | 183–187 |
| phosphorus content (%) | 4.7–5.0 |
Applications
- Polyethylene and polypropylene processing stabilization
- Engineering polymers (ABS, PA, PET, PC)
- Polyolefin fibers and films
- Masterbatch and compounding
- Adhesives and sealants
Key Features
- Highly effective hydroperoxide decomposer
- Prevents processing-induced yellowing and discoloration
- Synergistic with phenolic antioxidants (1010, 1076)
- High melting point ensures low volatility in processing
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CAS Number
31570-04-4
Category
Plastic / Rubber AdditivesAvailability
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