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 | Excellent (375-400°C) |
| Light Fastness | Excellent |
| Weather Fastness | Excellent |
Applications
- 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.
Related Products
You may also be interested in these products
OB-ER-I
Optical brightener ER-I has a high whitening brightening effect and excellent fastness to sublimation. It is used in whitening of polyester fiber and plastics such as PE, PP, PVC.
OB-ER-II
Optical brightener ER-II has bluish color shade with high whitening brightening effect and excellent fastness to sublimation. Mainly used as whitening agent for polyester fiber, as well the raw material of making paste form brightening agent in textile dyeing.
OB-FP-127
Optical Brightener FP-127 is widely used for whitening various plastic products, especially for flex PVC and PS, which have better affinity and whitening effects. It has excellent whitening and brightening effects for synthetic leather.
OB-KCB
Optical Brightener KCB is widely used in the whitening of synthetic fiber and plastics. KCB is the first choice for whitening EVA foam for footwear materials. It has strong light stability and heat resistance and is chemically stable.