LOTSORB UV 479 (CAS:)

Product Description 

Lotsorb UV 479 is a hydroxyphenyl-triazine (HPT) UV absorber designed to fulfill the high  performance and durability needs for automotive and industrial finishes. 

Key Features & Benefits

- Extremely high extinction coefficient in the Lotsorb UV-B and Lotsorb UV-A range 

- Low volatility/low migration 

- Excellent photo-permanence

Chemical Composition

Hydroxyphenyl-triazine UV absorber

Properties Typical

Properties

Appearance                            light yellow crystalline powder 

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

butyldiglycol                          2 

butanol                                  < 1

butyl acetate                          17 

butylglycol acetate                12

methoxypropl acetate           10

methoxypropanol                  1 

Solvesso® 100 ¹                    23 

Solvesso® 150 ¹                    10

water                                     < 0.01 ¹

UV Transmittance Spectrum in chloroform, cell thickness: 1 cm

Line one: 0.001% Lotsorb UV 479, corresponds to 0.25% in a 40 µm film 

Line two: 0.002% Lotsorb UV 479, corresponds to 0.50% in a 40 µm film 

Line three: 0.003% Lotsorb UV 479, corresponds to 0.75% in a 40 µm film 

Line four: 0.004% Lotsorb UV 479, corresponds to 1.0% in a 40 µm film 

Line five: 0.006% Lotsorb UV 479, corresponds to 1.5% in a 40 µm film

Applications

Lotsorb UV 479 is an HPT UV absorber that provides excellent performance in coatings due to: 

• Extremely high extinction coefficient

• Very high photostability for long life performance

• Very high thermal stability and performance for coatings exposed to high bake cycles and / extreme  environmental conditions 

• Very low volatility

• Excellent performance in thin film applications

• Ideal spectral coverage in combination with other UV absorbers

Lotsorb UV 479 has been developed as an interaction-free UV absorber to be used in amine and / or  metal catalyzed coating systems or in coatings applied on base coats containing such catalysts. 

Its high extinction coefficient allows the formulation of coatings with reduced UV absorber levels and /  or thin film applications. Combinations especially with other HPT UV absorbers and the newest  generation photoinitiators makes it an excellent choice for UV curable coatings. 

Lotsorb UV 479 is recommended for automotive OEM and refinish systems, UV cured coatings, and  industrial finishes where long life performance is essential. Due to the high extinction coefficient and  superior photostability, applications specifically include thin film applications. Depending on the  application, the spectral coverage can be further broadened through combinations with other UV  absorbers of the hydroxyphenyl-triazine or hydroxyphenyl-benzotriazole class such as Lotsorb UV 400 or Lotsorb UV 928. 

The protective effects of Lotsorb UV 479 can be enhanced when used in combination with hindered  amine light stabilizers (HALS) such as Lotsorb UV 123, Lotsorb UV 292, or Lotsorb UV 152. These  combinations provide best protection against gloss reduction, cracking, blistering, delamination, and  color change. The light stabilizers may be added to clear coats, base coats, or solid shades.

 The amount of Lotsorb UV 479 required for optimum performance should be determined in trials  covering a concentration range.

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.