BASF Tinuvin 320 is a high-performance benzotriazole UV absorber specifically formulated for rigid PVC and unsaturated polyester applications. This advanced stabilizer delivers exceptional dual-peak UV protection while maintaining optical clarity, extending material service life by 3-5 times in demanding outdoor environments.
Targeted UV Defense - 304nm/346nm dual-peak absorption with >99% blocking efficiency
Material Stability - 60% lower volatility than standard benzotriazoles
Processing Friendly - Excellent solubility in PVC and polyester systems
Performance Booster - 70% enhanced weatherability with HALS synergists
Regulatory Ready - Complies with strict food contact and environmental standards
Construction Materials - Weatherproofing for PVC profiles and pipes
Automotive Finishes - UV protection for polyester gel coats
Industrial Protection - Durable coatings for machinery and equipment
Technical Textiles - UV resistance for synthetic fibers
Solar Components - Encapsulation protection for photovoltaic films
Chemical Composition | 2-(2H-Benzotriazol-2-yl)-4,6-di-tert-butylphenol |
CAS Number | 3846-71-7 |
Molecular Weight | 323.44 |
Appearance | White to Pale Yellow Crystalline Powder |
Melting Point | 137-141°C |
Volatiles (150°C/3h) | ≤0.5% |
UV Absorption Peaks | 304 nm / 346 nm |
Molar Extinction Coefficient (346 nm) | 14,520 L/mol·cm |
Solubility (20°C) | Acetone:21% / Chloroform:24% / Dichloromethane:26% |
Thermal Stability (TGA) | 1% wt loss@178°C / 5% wt loss@203°C |
Recommended Dosage | 0.1-1.0% (on substrate weight) |
Flash Point | >300°C |
Density | 1.22 g/cm³ |
Moisture Content | ≤0.1% |
Ash Content | ≤0.01% |
Packaging | 20 kg/bag (aluminum foil moisture-pro |
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