UV absorber UV-320

　　Chemical name: 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriazole

　　Relative molecular mass: 323.44

　　English name: ultraviolet absorbent UV-320

　　Appearance: white powder

　　Molecular formula: C20H25N3O

　　Melting point: 152～154℃

　　Boiling point: 444°C (760mmHg)

　　Density: 1.1g/cm3

　　Ejection rate: 1.585

　　Quality standard: content ≥99.0%. Transmittance: 440nm, ≥97%; 500nm, ≥98%

　　Application performance: This product is widely used in plastics and other organic materials, including unsaturated polyester, PVC, PVC plasticizer, etc., in polyurethane, polyamide, synthetic fiber, especially those with polyester, epoxy In the application of resin, the effect of UV320 is more prominent. UV320 has the characteristics of strong ultraviolet absorption capacity and low volatility. It can effectively protect polyester and organic pigments from ultraviolet radiation, thereby protecting the original physical appearance of molded objects, films, etc. in the open air. UV320 is slightly lighter than ordinary ultraviolet absorbers.