Ultraviolet absorber UV-327 is a kind of benzotriazole ultraviolet absorber with excellent performance, the chemical name is 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorinated Benzotriazole, commercially available products are usually light yellow or white powder, soluble in styrene, benzene, toluene and other solvents. The absorption wavelength range is greater than that of the ultraviolet absorber UV-P, which can strongly absorb ultraviolet rays of 300-400 mm, the highest absorption peak is 353 nm, and has good chemical stability and low volatility. Chemicalbook has good compatibility with polyolefins, especially Suitable for polyethylene (PE), polyvinyl chloride (PVC), polystyrene and polypropylene (PP), and also for polymethyl methacrylate, polyoxymethylene, unsaturated polyester, polymethyl methacrylate Ester, polyurethane, ABS resin, polypropylene fiber, coatings, colorants, adhesives, candle wax and other polymers and many other fields. Low toxicity, non-flammable, non-corrosive, good storage stability, and thioester antioxidant DLTDP (PS800) combined with a significant synergistic effect.