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　　Ultraviolet Absorbent UV-320/ Eversorb77 / butylphenol/ UV absorber/ UV absorbent

　　Chemical Name Ultraviolet Absorber UV-320

　　Molecular Weight 323

　　Chemical Formula C20H25N3O

　　Main Indexes

　　Appearance: white powder

　　Melting Point: 152-156.C

　　Purity: 99% ( HPLC) min

　　Light Transmittance: 440( nm) 97% min

　　500( nm) 98% min

　　LD50: 2000mg/ kg min

　　Characteristics and Uses

　　UV320 is a high-efficient light stabilizer , widely apply to in the plastics and other organic matter, including unsaturated polyester, PVC, PVC plasticizing glue, etc. It has better effect when applied to in the polyurethane, polyamnamee, synthetic fibers especially those polyester and epoxy resins. UV320 has strong ultraviolet absorbtion ability and low volatility characteristics. It can effectually protect the polyester and the organic colouring avoname ultraviolet radiation, thus protect the primitive physics appearances of the shaping object, films, etc. which under the open-air state.The color of the UV320' s is lighter than general ultraviolet absorbers.

　　Storing and Packing

　　25kg cardboard drum

　　Bohanchem offers plastic additives ( chemical additives) such as optical brightener ( optical brightening agent, fluorescent whitening agent) , UV absorber ( UV absorbent) , light stabilizer ( light stabilizing agent, UV stabilizer, UV stabilizing agent) , antioxidant, pigment.

　　Polymerization retarder: 701 ( 4-hydroxy-TMHPO, TEMPO)

　　Fluorescent whitening agent: OB, OB-1, KCB, FP-127, KS, NFW

　　UV absorbers: UV-0, 531( BP-12) , UV-9, UV-P, 326, 327, 328, 329( 5411) , UV-T, 234, 571, 320

　　Antioxidant : 1010, 1076, 168, 264, 1098, 2246, 300, 311, B102, DLTP, DSTP, B215, B225, B900

　　Light stabilizer: 622, 770, 944, 802

　　Pigments: red 122, red 254, violet 19, violet 23, yellow 110, yellow 138, titanium dioxide