Light stabilizers have different functions due to their own structure and variety. Some can shield, reflect ultraviolet rays or absorb ultraviolet rays and convert them into harmless heat energy; some can quench the excited state of molecules or groups excited by ultraviolet rays to return to the ground state, eliminating or slowing down the occurrence of photooxidation Possibility of reduction reaction; some of them capture the free radicals generated by photo-redox, thereby preventing the free radical reaction that leads to the aging of the product, and preventing the product from being damaged by ultraviolet rays.
For the effective prevention and retardation of light aging in the industry, more than two kinds of light stabilizers with different action mechanisms are used to absorb ultraviolet light in different wavelengths. It can achieve the best effect that a single light stabilizer cannot achieve.
The ultraviolet absorber added in sunscreen cosmetics has a sunscreen mechanism based on dispersing or absorbing the ultraviolet rays incident on the skin surface, so that the skin can avoid or reduce the damage of ultraviolet rays.
