HALS (Hindered Amine Light Stabilizer)
B.A. Special Chem & Color offers a wide choice of radical inhibitors with different basicities depending on the formulation needs.
Uses and classifications
The HALS – Hindered Amine Light Stabilizers – are derivatives of tetramethyl piperidines whose purpose is to trap free radicals once they are formed due to the photo-oxidation process. HALS are useful for preventing surface defects such as loss of gloss, cracking of the polymer film or chalking (in painting systems).
Over the years, different types of HALS have been developed with different degrees of basicity to be more similar and compatible with the pH of the various systems to be protected.
Over the years, different types of HALS have been developed with different degrees of basicity to be more similar and compatible with the pH of the various systems to be protected.
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HALS (Hindered Amine Light Stabilizers) |
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| What they are | Derivatives of tetramethyl piperidines. |
| Where they are used | Exterior. |
| What they are used for | Protecting against photo-degradation. |
| What they protect against | Surface defects, loss of mechanical properties, loss of water impermeability, pigment fading. |
| Functional mechanism | Deactivation of free radicals. |
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