UV Absorber 327

Chemical composition: 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-5-chlorobenzotriazole

Molecular formula: C20H24ON3Cl

Molecular weight: 357.9

Properties: pale yellow crystalline powder, relative density 1.20, melting point 154–158°C, soluble in benzene, toluene, styrene, etc.

Specifications: Appearance: pale yellow crystalline powder
Melting point: 154–158°C
Light transmittance: (10 g/100 ml ethanol) 460 nm ≥ 92%, 500 nm ≥ 96%
Volatile content: ≤ 0.5%

Applications: UV Absorber 327 is a UV absorber that strongly absorbs ultraviolet light in the 270–400 nm range, with low volatility and good chemical stability. It has good compatibility with polyolefins. It is suitable for polyethylene, polypropylene and PVC, and can also be used in polymethyl methacrylate, polyoxymethylene, polyurethane, unsaturated polyester, ABS, epoxy resin and cellulose resin, etc. This product offers excellent heat resistance and washing resistance. UV Absorber 327 shows a marked synergistic effect when used together with antioxidants. The typical dosage in plastics is 0.3–0.5%.