UV absorbent uv-329 is white powder, melting point 101-106℃, soluble in benzene, styrene, ethyl acetate, slightly soluble in ethanol, insoluble in water, it is a light stabilizer with excellent performance and low volatility.
Chemical name : 2- (2'-Hydroxy-5'-tert-octylphenyl)benzotriazole Introduction : UV-329 is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers. UV-329 is an effective light stabilizer for a variety of plastics and other organic substrates.
Empirical Formula : C20H25N30
CAS NO : 3147-75-9 Structure : Physical Properties
Molecular Weight : 323
Appearance : white powder
Melting Range : 103-105 °C
Flashpoint : 150 °C
Specific Gravity(20 °C ) : 1.18g/cm3
440nm≥ 97 %
Solubility At 20 °C (g/100ml solvent)
Ethyl Alcoho (95%)
Applications1. Unsaturated Polyester : 0.2-0.5wt% based on polymer weight2.PVC:Rigid PVC : 0.2-0.5wt% based on polymer weightPlasticized PVC : 0.1-0.3wt% based on polymer weight3.Polyurethane : 0.2-1.0wt% based on polymer weight4.Polyamide : 0.2-0.5wt% based on polymer weight