LOTSORB UV 928 (CAS:73936-91-1)

General

Lotosrb® UV 928 is a UV absorber of the hydroxyphenyl benzotriazole  class developed specially for high performance coating applications.  The characteristic broad band absorption of UV 928 provides  efficient protection to coatings and light sensitive substrates. The product has excellent solubility and high thermal and environmental  permanence, which makes it particularly suitable for coatings exposed  to high temperature curing processes, such as powder and coil coatings, or high environmental stress.

Chemical Structure

2-(2H-Benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3- tetramethylbutyl)phenol Molecular 

weight : 441.6 

CAS No. 73936-91-1

Transmittance Spectrum

 (in Toluene, cell thickness 1 cm)

Explanation: Top line: 0.001 % UV 928, corresponds to 0.25 % in a 40 mm film

Second line: 0.002 % UV 928, corresponds to 0.5 % in a 40 mm film 

Third line: 0.004 % UV 928, corresponds to 1.0 % in a 40 mm film 

Bottom line: 0.006 % UV 928, corresponds to 1.5 % in a 40 mm film

Physical Properties

Appearance: Light yellow crystalline powder 

Melting range: 109 - 113° C 

Solubility at 20° C (g/100 g solution):

Applications

Lotosrb® UV 928 is recommended for applications such as:

 · automotive coatings

 · powder and coil coatings

Packaging and Handling

Packaging: 25Kg/Carton

Store the product in a cool, dry, well-ventilated area away from incompatible materials. Unless stated, proper storage will permit usage of the product for 12 months from the manufacture date. For additional handling and toxicological information, consult the Material Safety Data Sheet.