BASF (Ciba) Thiophene-Benzotriazole series Tinopal OB is a yellow-green powder fluorescent brightener. It fits polymer whitening, with excellent thermal/light stability, low volatility, good compatibility, and pure blue effect at low dosage.
Outstanding high-temperature resistance, suitable for extrusion, injection molding and other polymer processes.
Excellent weather resistance, delaying whitening attenuation in outdoor applications.
Good compatibility with resins and additives, no precipitation, ensuring uniform product appearance.
Strong whitening selectivity, accurately correcting polymer yellowness and enhancing whiteness.
Low migration property, meeting safety requirements of high-end packaging materials.
Suitable for general and engineering plastics like PP/PE, PVC, PC and acrylates.
Used in textile fibers, film products, sheet molding and plastic injection parts.
Applicable in UV-curable coatings, flexographic inks and synthetic leather brightening.
Fits optical performance optimization of hot melt adhesives and pressure-sensitive adhesives.
Serves as yellowness corrector for plastic recycled materials to restore whiteness.
| Property | Specification / Value |
|---|---|
| Appearance | Yellow-green powder |
| Chemical Category | Thiophene-benzotriazole |
| Melting Range | 196 - 202 °C |
| Flash Point | > 350 °C |
| Density (20°C) | 1.26 g/cm³ |
| Vapor Pressure (20°C) | 2.6 x 10⁻⁸ Pa |
| Absorption Wavelength (λ_max) | 375 nm |
| Molar Absorptivity (K) | 113.0 |
| Water Solubility (20°C) | < 0.01 % (w/w) |
| Acetone Solubility (20°C) | 0.5 % (w/w) |
| Chloroform Solubility (20°C) | 14 % (w/w) |
| Ethyl Acetate Solubility (20°C) | 1 % (w/w) |
| n-Hexane Solubility (20°C) | 0.2 % (w/w) |
| Light Fastness (Polyolefin) | 5 - 6 |
| Heat Resistance | Up to 300 °C (short-term) |
| Recommended Addition Level | 0.001 - 0.1 % (w/w) (varies by substrate) |
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