UV absorber UV-531

　　Common name: ultraviolet absorber UV-531

　　Chemical name: 2-hydroxy-4-n-octyloxybenzophenone

　　English name: ultraviolet absorber UV-531

　　Molecular formula: C21H26O3

　　Relative molecular mass: 326.64

　　Appearance: light yellow or white crystalline powder

　　Content ≥99.0%

　　Melting point: 48～49℃

　　Loss on drying ≤0.5%

　　Relative density: 1.160 (25℃)

　　Ash content ≤0.1%

　　Solubility: solubility 25°C (g/100g, solvent): acetone 74, benzene 72; methanol 2; ethanol (95%) 2.6; n-heptane 40; n-hexane 40.1

　　Absorption range: 270～330nm

　　Application performance: It is a kind of high-efficiency ultraviolet absorber with excellent performance. It has the characteristics of light color, non-toxic, good compatibility, small migration and easy processing. It has the greatest protective effect on the polymer and helps reduce color, while delaying yellowing and retarding the loss of physical properties. It is widely used in PE, PVC, PP, PS, PC, plexiglass, etc., but also for dry phenolic and alkyd varnishes, polyurethanes, acrylics, epoxy and other air-drying products and automotive refinish paints, powder coatings , Polyurethane, rubber products, etc. provide a good light stabilization effect.

　　Dosage: generally 0.1%～0.5%

　　Safety: non-toxic, non-corrosive, non-flammable, non-explosive, stable storage and transportation performance