Benzotriazole Based Ultraviolet Absorbers
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2-(2’-Hydroxy-3’,5’-di-t-amylphenyl)benzotriazole.
Synonym: 2-(2H-Benzotriazol-2-yl)-4,6-ditertpentylphenol
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PowerSorb™ 328 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.
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| Chemical Name: |
2-(2’-Hydroxy-3’,5’-di-t-amylphenyl)benzotriazole |
| CAS No.: |
25973-55-1 |
| EINECS No.: |
247-384-8 |
| Formula: |
C22H29N3O |
| Molecular
Weight: |
352 |
| Specific Gravity[25°C, g/cm3]: |
1.17 |
| Melting Point(°C): |
79-83 |
| Boiling Point(°C): |
477.8 |
| Flash Point(°C): |
229 |
| Vapor Pressure[25°C, Pa]: |
4.3E-9 |
| Volatile Loss(%): |
Max.0.5 |
| Color of Solution 460nm(%): |
Min.97 |
| Color of Solution 500nm(%): |
Min.98 |
| Appearance: |
Pale Yellow Powder |
| Ash(%): |
Max.0.1 |
| Min. Purity: |
99% |
| Solubility (20°C) |
% w/w |
| Acetone: |
6 |
| Benzene: |
39 |
| Butyl Carbitol: |
3.5 |
| Butanol: |
2.5 |
| Butyl acetate: |
15 |
| Chloroform: |
44 |
| Cyclohexane: |
56 |
| Dichloromethane: |
56 |
| Ethanol: |
0.6 |
| Ethyl acetate: |
20 |
| Ethylglycol: |
4 |
| n-Hexane: |
16 |
| MEK: |
14 |
| Methanol: |
0.4 |
| Methyl ethyl ketone: |
24 |
| Mineral spirits: |
14 |
| Styrene: |
34 |
| Water: |
<0.01 |
| Xylene: |
34 |
PowerSorb™ 328 features strong UV absorption, low initial color, good solubility in plasticizers and monomers, moderately low volatility, and excellent compatibility in a wide variety of substrates.
PowerSorb™ 328 can be used in combination with phenolic & phosphite antioxidants, and HALS to optimize performance in outdoor use.
PowerSorb™ 328 is suitable for use in polyolefins, PVC, styrene homo and copolymers, ABS, acrylic polymers, unsaturated polyesters, thermoplastic urethanes, moisture cured polyurethanes, polyacetals, polyvinylbutyral, two component epoxies and urethanes, oil alkyds and thermosetting acrylic enamels. |
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PowerSorb™ 328 is supplied in 25kg carton box or 40kg fiber drum.
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