Uv Absorber And Hals

UV Absorbers absorb harmful UV rays. With radiation-free processes, they can convert energy in UV light into harmless vibrational energy. This process can repeat itself indefinitely to provide long-term protection. UV Abbsorbers are used for light sterilization of paint, polyurethanes,PVC, engineering plastics, adhesives and elastomers. Combinations of UV absorbers with other light stabilizers such as HALS or absorbers act synergisrically. Benzoate light stabilizers stop photo-oxidation processes in polymers such as HALS by chemically reacting with free and radical intermediates. Benzaoates are often used in conjuction with HALS and UV absorbers, rather than alone. These combinations usually show strong synergistic effects. Benzoate and HALS combination of polyolefins (PP and TPO) benzoate and UV absorber combinations are more effective on PVC, polyacetal and polyester.