What is light stabilizer/UV absorber?

Light stabilizer is also called UV absorber, UV absorbance,etc, which is a is used to prevent or slow degradation caused by exposure to ultraviolet radiation.

Adding a light stabilizer can make a product last longer, although more expensive, but this is viewed as an acceptable tradeoff.

Paints, plastics, rubber, synthetic fibers and other products exposure to the sunlight or strong fluorescence (which containing more harmful ultraviolet rays than ordinary fluorescent), caused by self-absorption of ultraviolet oxidation, resulting in degradation of the polymer, so that the appearance and physical deterioration of the mechanical properties of products, this process is called photo-oxidation reduction or photoaging. Therefore, these products are often treated with  with a light stabilizer or have the stabilizer integrated into their manufacture.The concentration of the stabilizer varies, depending on how it acts and the specific needs of the product. Once stabilized, the product can still decay, but the process will be slowed. Especially if combined with sensible care, a Light stabilizer can extend a product's lifetime significantly.

UV absorber (UVAs) act by absorbing UV radiation before it reaches the product. These products need to be used in high concentrations to be effective, as otherwise they will not be able to absorb enough light to preserve the product. Hindered amine light stabilizers (HALS) work by trapping free radicals generated during the oxidation process, effectively halting the chain reaction which allows degradation to occur. These stabilizers can be added in lower concentrations because only a small amount is needed to be effective.

There are many different kinds of light stabilizer,you can get some of them from our products list page: http://www.scienoc.com/uv_absorbers.html