Improve light stability of polymers against UV radiation.
Light-induced degradation of polymers is a result of the combined action of oxygen and UV radiation. Exposure of polymeric materials to UV can lead to deterioration of morphological and physicochemical properties.
Usual results are yellowing, cracking, chalking, and inferior mechanical properties due to the changes in the chemical structure of the molecules.
Light stabilizers are employed in order to inhibit photodegradation by either absorbing the harmful part of radiation or by interfering with the chemical reaction of photooxidation and preventing its propagation.
Various blends of UV stabilizers are available, suitable for each specific application and material type.