5327

2-(2’-Hydroxy-3’, 5’-di-t-butylphenyl)-5-chlorobenzotriazole. It is a highly effective light stabilizer. Due to its red-shifted UV absorption, it is particularly suited for use in the stabilization of polymers that are especially sensitive to long-wavelength UV radiation. It is compatible with acrylic polymers, polycarbonate, polyesters, styrene homo- and copolymers, unsaturated polyesters, polyurethanes, polyphenylene sulfide, polyvinylchloride, polyolefins, polyvinyl butyral and elastomers. Used in certain applications where very low transmission of long-wavelength UV radiation is required e.g. optical lenses.