BASF Tinuvin 928 is a premium benzotriazole UV absorber engineered for demanding high-temperature coating applications. This advanced stabilizer delivers exceptional UV protection with dual-peak absorption, significantly extending coating durability while maintaining optical clarity in automotive and industrial systems exposed to extreme environmental conditions.
Dual-Peak Efficiency - Optimal UV absorption at 304nm and 346nm wavelengths
Thermal Endurance - Maintains stability above 220°C processing temperatures
Universal Compatibility - Excellent solubility in various resin systems
Synergistic Performance - 80% enhanced durability with HALS stabilizers
Environmental Safety - Low volatility and heavy metal-free formulation
Automotive Finishes - Long-term gloss retention for OEM and refinish coatings
Industrial Protection - Weather resistance for pre-painted metal substrates
Wood Preservation - Color stability for exterior wood varnishes
Packaging Safety - Compliant UV protection for food-contact inks
Renewable Energy - Durability enhancement for solar panel components
Chemical Name | 2-(2H-Benzotriazol-2-yl)-6-(1-methyl-1-phenylethyl)-4-(1,1,3,3-tetramethylbutyl)phenol |
CAS Number | 73936-91-1 |
Molecular Weight | 441.6 g/mol |
Appearance | White to Pale Yellow Crystalline Powder/Pellets |
Melting Point | 109-113°C |
Density (20°C) | 1.07 g/cm³ |
Vapor Pressure (20°C) | <10⁻⁶ Pa |
UV Absorption Peaks | 304 nm / 346 nm |
Molar Extinction Coefficient (346 nm) | 15,500 L/mol·cm |
Light Transmittance | 440 nm≥97% / 500 nm≥98% |
Solubility (20°C) | Xylene:>10 g/100g / Butyl Acetate:>30 g/100g / n-Hexane:>50 g/100g |
Volatiles (150°C/3h) | ≤0.3% |
Ash Content | ≤0.1% |
Moisture Content | ≤0.1% |
Oral Toxicity (Rat LD₅₀) | >2000 mg/kg |
Recommended Dosage | 1.0-3.0% (on binder weight) |
Packaging | 20 kg/bag (moisture-proof foil) |
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