High-performance hindered phenolic antioxidant specifically designed for polyamide (PA6, PA66) processing and long-term thermal stability.
Excellent compatibility and low volatility in high-melting engineering thermoplastics, minimizing blooming and plate-out.
Outstanding hydrolytic stability—retains efficacy even under humid processing conditions and in moisture-sensitive polymers.
Synergistic with phosphite co-stabilizers (e.g., Irgafos 168), enabling optimized stabilization packages for demanding applications.
Non-discoloring performance—preserves polymer clarity and color stability during extrusion, injection molding, and long-term aging.
Stabilization of polyamide 6 (PA6) for automotive under-hood components.
Long-term thermal stabilization of polyamide 66 (PA66) in electrical & electronics housings and connectors.
High-temperature processing aid for glass-fiber reinforced polyamides used in structural engineering parts.
Stabilizer in polyamide-based hot-melt adhesives requiring melt stability and oxidative resistance.
Key additive in food-contact compliant polyamide packaging films (subject to regional regulatory approval).
| Chemical Type | Hindered phenol (N,N'-hexamethylenebis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionamide]) |
| Product Form | Free-flowing white to off-white crystalline powder |
| Appearance | White to pale yellow crystalline solid |
| Melting Range | 205–215 °C (determined by DSC) |
| Primary Applications | Polyamide 6, polyamide 66, and related polyamide blends |
| Key Features | Low volatility, high compatibility, hydrolytic stability, non-staining |
| Benefits | Extended service life, reduced discoloration, minimal plate-out, improved melt processability |
| Regulatory Status | Compliant with EU Regulation (EC) No 10/2011 for food contact (when used within specified limits) |
Q1: What is the primary function of Irganox 1098 in polymer systems?
A: Irganox 1098 is a high-performance hindered amine light stabilizer (HALS) and secondary antioxidant, primarily used to inhibit thermal-oxidative degradation during polymer processing and long-term service life—especially in polyamide (PA6, PA66) and other engineering thermoplastics.
Q2: Is Irganox 1098 suitable for food-contact applications?
A: Irganox 1098 is widely used in food-contact compliant polyamide packaging and components where regulatory approval has been obtained by the end-user’s formulation and manufacturing process; however, final compliance depends on full system evaluation and applicable regional regulations.
Q3: How does Irganox 1098 compare to phenolic antioxidants like Irganox 1010 in polyamide applications?
A: Unlike primary phenolic antioxidants, Irganox 1098 offers superior long-term thermal stability in polyamides due to its unique bis-hindered amine structure and low volatility, providing enhanced protection against discoloration and mechanical property loss during repeated extrusion or high-temperature molding.
Q4: What is the typical dosage range for Irganox 1098 in engineering plastics?
A: Dosage is formulation-dependent, but Irganox 1098 is typically used at low concentrations—generally ranging from 0.1% to 2% by weight—in polyamide-based systems, with optimal performance often achieved in combination with primary antioxidants or phosphites.
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