紫外线吸收剂Lowilite 27 Ultraviolet Light Absorber Lowilite 27 is an ultraviolet light absorber belonging to the benzotriazole class of UVAs. 2-(2´-Hydroxy-3’,5’-di-t-butylphenyl)-5-chlorobenzotriazole CAS Reg. Number [3864-99-1] Typical Properties Appearance Pale yellow powder Bulk density, (g/ml) 0.54 Molecular weight 358 Specific Gravity @ 25°C 1.26 Melting range, °C 154-158 Flash point, °C 454 Thermogravimetric Analysis ( 10 mg @ 10°C/minute under N2) Weight Loss, % 5 10 25 Temperature,°C 214 230 250 Solubility @ 22°C (g/100 ml solvent) Xylene 15 Mineral Spirits 5 n-Butyl acetate 7 Toluene 16 Water 0 Styrene 14 Dioctyl phthalate 3 Hexane 3 N N N Cl HO Ethyl Acetate 6 Ethyl Alcohol 0.3 Lowilite 27 is a strong ultraviolet light absorber in the 290-400nm region. It provides effective light stabilization and prevents the yellowing and degradation of polymers such as polyolefins, PVC, unsaturated polyester, acrylics and ABS. Lowilite 27, due to its better compatibility with polyolefins and its lower volatility that Lowilite 55, is particularly suitable for polypropylene and polyethylene.