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Antioxidant 225
Applicable materials: Polymer materials such as PP, PE, EVA, POE, ABS, HIPS, TPE elastomers, hot-melt adhesives, and cable compounds.
Detail
Antioxidant 225 (B-225 / Irganox B225)
一、Basic CompositionOriginal BASF Grade: Irganox® B 225; Common Domestic Names: Antioxidant B225, 225
二、 Physicochemical Properties
Appearance: White free-flowing powder / granules
Volatiles: ≤0.5%
Ash Content: ≤0.1%
Solubility: Soluble in benzene, toluene, cyclohexane, and ethyl acetate; insoluble in water
CAS: 1010: 6683-19-8; 168: 31570-04-4
三、 Mechanism of Action (Synergistic Dual Function)
1010 (Long-term): Scavenges free radicals, inhibits late-stage thermo-oxidative aging, and provides long-term stability for the finished product.
168 (Processing): Decomposes hydroperoxides generated during high-temperature processing; prevents melt degradation and yellowing; maintains melt flow index (MFI) stability.
Synergistic effect (1+1 > 2): Combines processing stability with long-term antioxidant protection.
四、 Key Advantages
✅ Maintains melt flow rate during processing; prevents molecular weight reduction.
✅ Inhibits yellowing during high-temperature processing; ensures good color stability.
✅ Provides long-term protection against thermo-oxidative aging; extends the service life of plastics.
✅ Low volatility; resistant to blooming/migration during high-temperature extrusion.
✅ Two-component blend in one package; simplifies dosing and reduces compounding errors.
五、 Applicable Materials
Polyolefins (Most common)
PP (Polypropylene), PE (Polyethylene), Polybutene, EVA, POE, Polyolefin Elastomers
Engineering Plastics & Styrenics
ABS, HIPS, GPPS, AS, PU (Polyurethane)
Others
TPE/TPR Elastomers, Adhesives, Hot-melt Adhesives, Cable Compounds
Can be compounded with HALS (Hindered Amine Light Stabilizers) and UV absorbers for weather-resistant formulations.
六、Recommended Dosage
Standard Polyolefins: 0.1–0.25% | Demanding Processing / Long-life Products: 0.25–0.5% (Adjusted upwards based on processing temperature and service life requirements)
七、 Comparison: B215 vs. B225 (often confused)
B215 = 1010 : 168 = 1:2; higher phosphite content; focuses on anti-yellowing during processing.
B225 = 1010 : 168 = 1:1; higher hindered phenol content; focuses on long-term aging stability.
八、 Packaging, Storage, and Transportation
25 kg fiber drum with plastic liner; store in a sealed container in a cool, dry place. Not classified as a hazardous chemical; non-flammable and non-explosive.
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