OB-1
Optical Brightener OB-1 has excellent thermal stability and high-temperature resistance of 375-400°C. It is the best heat-resistant OBAs among all whitening agents. It performs for general high polymers, especially for high melting point engineering plastics such as polysulfone resins.
Key Features
Technical Specifications
| C.I. NO. | C.I. 393 |
| CAS Number | 1533-45-5 |
| Appearance | Yellowish green crystal powder |
| Purity | 98.50% |
| Melting Point | 355-360°C |
| Volatility | ≤0.5% |
| Molecular Formula | C28H18N2 |
Physical Data & Fastness Properties
| Ash | ≤0.03% |
| Max Absorption Wavelength | 374nm (in ethanol) |
| Max Emission Wavelength | 434nm (in ethanol) |
| Heat Resistance | 300°C |
| Light Fastness | Excellent |
| Weather Fastness | Excellent |
Application Fields
This product is widely used in the following application fields, providing excellent coloring performance and durability:
- Polyester resin and fiber
- Nylon (PA)
- Polypropylene (PP)
- ABS plastics
- Polystyrene (PS)
- HIPS (High Impact Polystyrene)
- Polycarbonate (PC)
- EVA (Ethylene Vinyl Acetate)
- Rigid PVC
- Food packaging plastics
Usage Instructions
Transparent: 0.0025-0.005%. Commonly used: 0.01-0.05%. General usage: 25-300mg/kg. Due to the dosage amount being small, please mix thoroughly for the best effect. When using any UV absorb additive, the dosage of optical brightener OB-1 should be adjusted.
Frequently Asked Questions
What is OB-1 used for?
OB-1 is mainly used for transparent coloring of Polyester resin and fiber, Nylon (PA), Polypropylene (PP), ABS plastics and other polymers, and can also be used for masterbatch production.
What are the key properties of OB-1?
OB-1 offers a heat resistance of 300°C, and has light fastness rated Excellent.
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