BASF Uvitex OB-ONE is a yellow crystalline powder fluorescent brightener for polymer whitening. It has excellent heat resistance, light fastness, low volatility & compatibility, works at low dosage, and is food-contact approved (subject to local regulations).
Excellent heat resistance, suitable for high-temperature polymer processing.
Good light fastness, maintaining long-term bright whitening effect.
High compatibility with polymers & additives, no precipitation risk.
High whitening efficiency, 0.005-0.1% dosage meets various needs.
Food-contact application approved, compliant for packaging materials.
Suitable for polyester, polyamide, PC, ABS and other plastics.
Used for whitening polyester/polyamide fibers and polypropylene fibers.
Fits optical optimization of injection molded products, films and sheets.
Applicable for whiteness improvement of EVA and acrylic polymers.
Suits polyester polymerization (adjust addition method by DMT/TPA type).
| Parameter | Specification / Value |
|---|---|
| Appearance | Yellow crystalline powder |
| Chemical Name | 4,4'-Bis(benzoxazol-2-yl)stilbene |
| Melting Range | 359 ± 5 °C |
| Density (20°C) | 1.35 g/cm³ |
| Vapor Pressure (20°C) | 1.0 x 10⁻¹⁷ mbar |
| Maximum Absorption Wavelength (CHCl₃) | 374 nm |
| Recommended Dosage | 0.005 - 0.1 % (w/w) |
| Standard Dosage (Polyester Fiber) | ~0.02 % (w/w) |
| Light Fastness (Polyester) | ≥ 7 |
| Heat Resistance (Short-term) | Up to 330 °C |
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