UV Stabilizers (UV Stabilizers) are a class of chemicals used in plastics, coatings, fibers and other substances to reduce or prevent the aging of materials caused by UV exposure. They are able to absorb ultraviolet radiation, convert it into less harmful heat, or stabilize

 it through photochemical reactions, thereby protecting the material from destruction. Here are some common types of anti-UV additives:

UV Absorbers - These compounds absorb UV light and convert it to lower energy heat or harmless wavelengths, thereby preventing UV damage to the material. Some common UV absorbers include:

Benzophenones

Benzotriazoles

Cinnamate-based compounds

HALS (Hindered Amine Light Stabilizers) - Hindered amine light stabilizers are used to resist prolonged UV exposure. HALS neutralizes free radical reactions caused by UV light. They are one of the most effective anti-UV additives available and provide long-term protection.

Quinolones (Quinones) - These compounds have light-stable properties and can absorb ultraviolet light.

Metal salts (such as nickel and zinc complexes) - Certain metal salts also act as stabilizers, protecting the material from UV light.

Carbon Black - In some applications, the addition of a very small amount of carbon black can absorb ultraviolet light and provide protection, and is commonly used in plastic and rubber products.

Nanoparticles (such as titanium dioxide (TiO2) and zinc oxide (ZnO)) - Although not specifically developed as anti-UV agents, these nanoparticles can be used in coatings and plastics to provide UV protection.

The choice of anti-UV additives depends on many factors, including the nature of the target material, the environmental conditions exposed to UV light, the expected life of the product, and the cost. These additives are usually used in extremely small doses, but have a significant impact on extending the life of the material and maintaining its appearance properties.