PowerSorb™ 329 is a benzotriazole type ultraviolet light absorber (UVA), imparting good light stability for plastics and other organic polymers.
Physical Properties
Chemical Name:
2-(2'-hydroxy-5'-tert-octylphenyl) benzotriazole
CAS No.:
3147-75-9
EINECS No.:
221-573-5
Formula:
C20H25N3O
Molecular
Weight:
323
Specific Gravity[25°C]:
1.18
Melting Point(°C):
102-106
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%
Solubility (20°C)
% w/w
3-A Alcohol:
0.7
Benzene:
65
n-Butanol:
2
Dioctyl phthalate:
15
Ethanol:
0.6
Ethyl acetate:
27.2
n-Heptane:
8.1
Methyl cellosolve:
5
Methylene Chloride:
70.9
Methyl methacrylate:
12
Styrenel:
22
Xylene:
50
Water:
<0.01
Applications
PowerSorb™ 329 protects polymers from UV radiation, helping to preserve the original appearance and physical integrity of molded articles, films, sheets and fibers during outdoor weathering.
PowerSorb™ 329 provides effective light stabilization and prevents the yellowing and degradation of polymers such as polycarbonate, unsaturated polyesters, and acrylics.
PowerSorb™ 329 can be used in combination with phenolic & phosphite antioxidants, and HALS to optimize performance in outdoor use.
