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Non-flammable
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Low Dielectric Property
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Reduced Gloss
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Antioxidants
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Antioxidant products can prevent polymers from undergoing chemical reactions or degradation during processing due to heat, shear stress, or exposure to other harsh processing environments. These reactions or degradation can lead to changes in the chemical composition or molecular weight of the product. Additionally, it can result in the deterioration of mechanical properties and affect the appearance, causing changes in the color of the polymer or a reduction in glossiness.
Antioxidants are products added to polymers during processing to protect the polymer's structure and prevent discoloration.
Phosphite Antioxidants
| Phosphite-based Antioxidants |
Chemical structure | Type | Molecular Weight | Melting point ℃ | TGA (°C, % weight loss) |
Applications |
| Alkanox®240 |
|
Powder/ |
646 |
180-186 |
256 5% 271 10% 315 50% |
Versatile organic phosphite antioxidants with excellent hydrolytic stability. |
| Ultranox® 626 Ultranox® 627A a |
|
Powder/ |
604 |
170-180 |
268 5% 288 10% 333 50% |
High-performance antioxidants with low addition levels, maintaining excellent color stability in products. |
| Weston® TNPP Weston® 399 b |
|
liquid |
688 |
– |
251 5% 274 10% 331 50% |
Multi-purpose stabilizers, mainly used for HDPE, LLDPE, SBR, ABS, PVC. |
| Weston® 705 Weston® 705T |
Patent protection |
liquid |
Patent protection |
– |
325 5% 349 10% 420 50% |
High-performance, environmentally friendly stabilizers without octylphenol. |
a. Ultranox® 627A is Ultranox® 626 with <1% triisopropanolamine, added DHT4A, and granulated.
b. Weston® 399 is Weston® TNPP with <1% triisopropanolamine.
