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UV Absorber Sunsorb 326

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Chemical Name: 2-(2'-hydroxy-3'-t-butyl-5'-methylphenyl)-5-chlorobenzotriazole

Trade name synonym:Tinuvin 326 (Ciba Specialty Chemicals ) , Lowilite 26(Great Lakes Chemicals)
CAS No .3896-11-5
M.W.: 315.8

Volatility Pure substance; TGA, heating rate 20 °C /min in air

Weight Loss (%)

Temperature °C

1.0

183

2.0

202

5.0

223

Solubility At 20 °C (g/100ml solvent)

Solvent 

 Solubility   

  Solvent 

  Solubility

Acetone

 1%

 Benzene 

   10.5%

Chloroform

 11.0%

 Cyclohexane 

   6.4%

Ethyl alcohol 

 0.1%

 Ethyl alcohol 

   0.1%

Ethyl acetate 

 2.0%

 Methanol 

   0.1%

Methylene chloride

 4.3%

 MEK

   13.3%

Toluene

 11.3%

 Water 

   0.01% 

 

Application:
Sunsorb-326 is benzotriazole type absorber. It exhibits strong absorbance in the 290-400nm region. Also, it is one of the most excellent benzotriazole UV absorbs.  Sunsorb-326 has a widely used in polyester, polyvinyl chloride, unsaturated polyurethane, styrene polymers, coatings and lacquers.  

 

Recommended dosage (based on polymer weight)

Unsaturated Polyester : 0.2-0.5wt%  

Rigid PVC           : 0.2-0.5wt% 

Plasticized PVC      : 0.1-0.3wt%  

Polyurethane        : 0.2-1.0wt%  

Polyamide          : 0.2-0.5wt% b 

Packaging:  20kg net per carton or fiber drum

 

Storage and shipment: It is stable during storage and shipment, avoiding high temperature and humidity.


 




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