Ultraviolet Absorbent UV 320

Name: Ultraviolet absorbent UV-320

Chinese name: 2-(2H-benzotriazol-2-yl)-4,6-di-tert-butylphenol

Synonyms:Tinuvin 320,UV-320
Introduction: Ultraviolet absorbent UV 320 is high-efficiency light stabilizing agent, and widely used in plastic and other organics. It has strong ultraviolet radiation absorption ability and low volatility.
Molecular formula: C₂₀H₂₅N₃O
Molecular weight: 323.4
CAS NO.: 3846-71-7
Chemical structural formula:
Chemical indexes:

Appearance	Light yellow powder
Content	≥ 99%
Melting point	152-154°C
Loss on drying	≤ 0.5%
Ash	≤ 0.1%
Light transmittance	440nm≥97%    500nm≥98%

Features 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. Tinuvin 320 has better effect when applied to in the polyurethane, polyamnamee, synthetic fibers especially those polyester and epoxy resins. 2-(2H-benzotriazol-2-yl)-4,6-di-tert-butylphenol has strong ultraviolet absorbtion ability and low volatility characteristics. UV absorbent 320 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.

Packing and storage: It is packed by 25kg cardboard drum.