UV absorbers are an essential component of clear lacquers for external applications. Recent studies suggest their use should be extended to pigmented top coats to enhance exterior durability. The UV absorber system normally consists of a UV absorber, such as the benzotriazoles or oxalanilide types, and a radical scavenger, such as hindered amine light stabilisers (HALS). The HALS is required to quench free radicals which are byproducts of the mechanism of absorption by the UV absorber.
Additives
9 сентября, 2015 
Malyar 
Опубликовано в рубрике Waterborne & Solvent Based Acrylics and their End User Applications