Speaking of professional chemical terms such as UV absorbers and photostabilizers, many people may not know what they are, but if UV absorbers are added to sunscreen, it can protect our skin from being tanned by the hot sun, Sunburn, many people may suddenly realize what a UV absorber is and what it does. In fact, ultraviolet absorbers and light stabilizers are added in large quantities in the organic material products we use every day, but you don't know it. The paint on the outside of the family car we drive is generally added to the paint. It can protect the color of the car from yellowing, fading, and loss of light. Some UV absorbers with special properties will also be added to the first layer of optical film, which can block harmful ultraviolet rays to protect our eyes from damage...
Since UV absorbers and light stabilizers are so widely used and have such great effects, what is the difference between them?
Both UV absorbers and light stabilizers are important chemical additives to protect and maintain the performance of organic materials, but there are some differences in their functions. The ultraviolet absorber can convert harmful ultraviolet rays through its special chemical structure, convert harmful ultraviolet destructive energy into harmless heat energy and release it, and avoid the high energy of ultraviolet rays from breaking the molecular chains of organic materials, thereby losing polymers. The properties that the material should have; and the light stabilizer can be understood as a scavenger for harmful free radicals. Once some ultraviolet rays break through the protection of the ultraviolet absorber and break the molecular chain of the organic material, forming harmful polymer free radicals, the light stabilizer It is possible to timely capture harmful free radicals into harmless stable small molecular structures. Usually people will add UV absorbers and light stabilizers to organic materials in a certain proportion, and its protective performance is often better than that of UV absorbers or light stabilizers alone.
Ultraviolet absorbers and light stabilizers are the collective names of two types of products, and there are many different types under them, forming a large industrial system. The common mainstream types of UV absorbers on the market include benzophenones, benzotriazoles, triazines, etc., which are different in terms of UV shielding performance and application industries; light stabilizers are also a general term, and the industry Often according to the different degrees of alkalinity, many qualities are produced, and there are also differences in powder and liquid in appearance.
