Ultraviolet absorbers is a kind of light stabilizer that can absorb the ultraviolet part of sunlight and fluorescent light sources without changing itself. Plastics and other polymer materials will undergo an auto-oxidation reaction due to the action of ultraviolet rays under sunlight and fluorescence, leading to degradation and degradation of the polymer, deteriorating the appearance and mechanical properties. After adding ultraviolet absorbers, these high-energy ultraviolet rays(Mainly includes UVA and UVB) can be selectively absorbed and turned into harmless energy for release or consumption.
Ultraviolet absorbers are the most widely used type of light stabilizers. According to their structures, they can be divided into Salicylates, Benzophenones, Benzotriazoles, Substituted Acrylonitriles, Triazines, etc. The most commonly used compounds are Benzophenones and Benzotriazoles in industry.