ADEKA PAE, a leading polymer stabilizer manufacturer, offers a wide range of plastic stabilizers that protect the polymer during processing and ensure the retention of physical properties in end products. These stabilizers come in various forms, making them easy to handle and apply. For more details on the available forms, refer to the Technical Datasheets provided by ADEKA PAE.
Light stabilizers are a group of additives that have been developed to minimise or prevent the damage to plastics caused by exposure to the environmental parameters of light, heat and air.
ADEKA Polymer Additives Europe offers a complete range of light stabilizers :
- Benzophenones
- Benzotriazoles
- Hindered Amine Light Stabilizers (HALS)
These light stabilizers provide protection from UV radiation by interfering with the physical and chemical processes of light-induced degradation according to different mechanisms.
Hindered amines show excellent UV protection by scavenging free radicals generated by photo degradation. When to use HALS or other light stabilizers depends on the processing requirements and demands of the end user. In some cases, combinations of light stabilizers have shown superior performance.
In general terms, stabilizers containing sterically hinderd amines, HALS are very efficient at scavenging free radicals and thus prevent these species from reacting and causing degradation of polymer chains.
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.
HALS (Hindered Amine Light Stabilizers),
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.