Technical Specs of UV Absorber UV-329
| Appearance | off white to pale yellow powder | |
| Melting point | 103-105℃ | |
| Flashpoint | > 150°C | |
| Solubility（20℃） | acetone | 9 |
| benzene | 32 | |
| chloroform | 37 | |
| cyclohexane | 15 | |
| ethyl acetate | 15 | |
| n-hexane | 6 | |
| methanol | 0.6 | |
| water | < 0.01 | |
Applications of UV Absorber UV-329
Features: Hydroxyphenyl-benzotriazole UVA with excellent spectral coverage in the UV region; Good photo permanence; Improves exterior durability of ambient and low temperature cured coatings.
UV 329 exhibits strong absorbance in the 300–400nm region and minimal absorbance in the visible region (> 400 nm) of the spectrum.
Protect variety of polymeric systems, particularly in polyesters, polyvinyl chlorides, styrenics, acrylics, polycarbonates and polyvinyl butyral during outdoor weathering. Typical end use applications include molded items, extruded sheets, glazing materials for window lighting, signs, marine, and auto applications.
UV 329 can be used alone or in combination with other additives (HALS,antioxidants).
Typical use levels range between 1.0 and 3.0%, depending on the substrate and performance requirements of the final applications.
Package of UV Absorber UV-329
UV Absorber UV-329 is packed 20kg per fiber drum lined with plastic bag, stored in cool and dry place without direct sunlight.
