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Light stabilizers are a class of additives added to plastics, coatings and other materials to inhibit or slow down the degradation of materials caused by photooxidation. They work by absorbing and dissipating harmful UV radiation, preventing discoloration, embrittlement and other forms of damage. There are two main types of light stabilizers, namely UV absorbers and hindered amine light stabilizers (HALS). UV absorbers can absorb UV radiation and convert it into harmless heat. HALS can play a role by scavenging free radicals produced by UV radiation during degradation.
As a common class of processing aid agent, the main functions of light stabilizers are as follows:
Protect Against UV Radiation
UV radiation causes degradation of polymers, resulting in color fading, loss of mechanical strength, cracking and overall deterioration of material properties. Light stabilizers can be used to protect materials, especially polymers such as plastics, coatings, adhesives and elastomers, from damage caused by UV radiation.
Extend Material Lifespan
Light stabilizers protect materials from UV rays, thus helping to extend their service life and maintain their appearance and performance over time. This is particularly important for outdoor materials that are exposed to sunlight for long periods of time, such as automotive components, building materials, outdoor furniture and packaging materials.
Improve Material Durability and Weatherability
The addition of light stabilizers to polymer formulations enhances the durability and weatherability of materials, making them more resistant to environmental factors such as sunlight, heat, humidity and chemical exposure. This ensures that materials retain their properties and functionality even under harsh outdoor conditions.
Maintain Material Appearance
Light stabilizers maintain the aesthetic appearance of the material by preventing fading, yellowing or chalkiness caused by degradation. This is very important for products that are vital for visual appeal, such as automotive finishes, architectural coatings and consumer goods.
Alfa Chemistry has developed a range of light stabilizers to meet the requirements of a variety of markets and applications. If you need, please contact us immediately.
