Phosphite Antioxidant
CAS Number: 31570-04-4
Tris(2,4-di-tert-butylphenyl) phosphite (Irgafos 168) secondary phosphite processing stabilizer that decomposes hydroperoxides formed during melt processing before they generate free radicals, thereby preventing color development and maintaining melt viscosity. It is the most widely used processing stabilizer for polyolefins, offering synergistic performance with hindered phenolic primary antioxidants.
Technical Specifications
| purity | ≥ 98% |
| acid value | ≤ 0.2 mg KOH/g |
| appearance | White crystalline powder |
| melting point | 183 – 187°C |
| loss on drying | ≤ 0.3% |
Applications
- Polyolefin processing (extrusion, injection molding)
- Engineering thermoplastics (PA, POM, PET)
- Hot-melt adhesives and pressure-sensitive adhesives
- Elastomers and rubber compounds
- Adhesive films and laminates
Key Features
- Hydroperoxide decomposer — prevents color formation
- Synergistic with hindered phenolic antioxidants
- Excellent melt stability during high-temperature processing
- Low extractability — good permanence
- FDA and EU food contact compliant
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CAS Number
31570-04-4
Category
Light / Heat StabilizersAvailability
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