Imported ultraviolet absorber UV-328

UV Absorber UV-328 is a benzotriazole UV absorber with dual functions of light stabilization and antioxidation. It absorbs ultraviolet light in the range of 270–380 nm, with an absorption peak at 343 nm. It features good compatibility, low volatility, excellent wash resistance and high absorption efficiency. It is suitable for low-temperature curing systems, industrial coatings, wood coatings, automotive coatings, polyethylene, polypropylene, polyurethane, polyoxymethylene, polyvinyl chloride, polystyrene, polyvinyl butyral, polymethyl methacrylate, ABS resin, epoxy resin, unsaturated resin and cellulose resin. Typical dosage: 0.1–0.5%.

Specifications

Appearance: White to pale yellow powder

Molecular weight: 351.5

Purity: ≥99.0%

Melting point: 80–83 °C

Flash point: 229.0 °C

Density @ 20°C: 1.08 g/cm³

Ash content: ≤0.1%

Volatile matter: ≤0.3%

Light transmittance: ≥97% at 460 nm, ≥98% at 500 nm

Packaging 25 kg carton / fiber drum

Applications Suitable for polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyester, epoxy resin, ABS resin, cellulose resin, etc. Typical dosage is around 1%. It also delivers excellent light stabilizing performance in various coatings.