UV absorber UV-328

　　Chemical name: 2-(2′-hydroxy-3′,5′-dipentylphenyl)benzotriazole

　　Chemical formula: C22H29N3O

　　CAS NO. 3896-11-5

　　main indicators:

　　Appearance: light yellow powder

　　Content: ≥99%

　　Melting point: 80-83℃

　　Loss on drying: ≤0.5%

　　Ash: ≤0.1%

　　Transmittance: 440nm≥97%; 500nm≥98%

　　Solubility: soluble in benzene, toluene, ethyl acetate and petroleum ether, slightly soluble in ethanol and methanol, insoluble in water

　　Features and uses: It is a highly effective ultraviolet absorber. The peak value of the ultraviolet absorption peak is 345nm. The light stabilization efficiency is similar to UV-326 and UV-327. However, this product has good compatibility with resin, low heat volatilization, and high washing resistance. Mainly used in polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyester, epoxy resin, ABS resin and cellulose resin, etc., the general dosage is about 1%. It also has excellent light stabilization effect in various coatings.

　　Storage, transportation and packaging: (1) UV-328 is non-toxic, non-flammable, non-explosive, non-corrosive, and has good storage stability. (2) Packed in cardboard drum lined with plastic bag, net weight 25kg per drum.