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Benzotriazole Based Ultraviolet Absorbers

PowerSorb™ 320

2-(2'-Hydroxy-3',5'-di-t-butylphenyl)benzotriazole.
Synonym:2-benzotriazol-2-yl-4,6-di-tert-butylphenol
Chemical Structure
Introduction / Features
PowerSorb™ 320 is a strong absorber of ultraviolet radiation and has a high degree of photostability - photochemical energy absorbed in the ultraviolet region is dissipated as thermal energy.
Physical Properties
Chemical Name: 2-(2'-Hydroxy-3',5'-di-t-butylphenyl)benzotriazole
CAS No.: 3846-71-7
EINECS No.: 223-346-6
Formula: C20H25N3O
Molecular Weight: 323
Melting Range: 152-155°C
Volatile Loss (%): Max.0.5
Color of Solution 460nm (%): Min.97
Color of Solution 500nm (%): Min.98
Appearance: White Powder
Ash (%): Max.0.1
Min. Purity: 99%


Applications
PowerSorb™ 320 is recommended for use in styrenics, vinyls, polycarbonates, polyesters and acrylics the normal use level in plastics ranges from 0.2 to 0.8%.
PowerSorb™ 320 is highly effective in stabilizing coatings such as urethanes and nitrocellulose in coatings applications, the use levels range from 0.5 to 2.0%. PowerSorb™ 320 can be used in combination with phenolic & phosphite antioxidants, and HALS to optimize performance in outdoor use.
Packings
PowerSorb™ 320 is supplied in 25kg carton box or 50kg fiber drum.
Technical Library
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