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.
Key Features
Technical Specifications
| C.I. NO. | C.I. 367 |
| CAS Number | 5089-22-5 |
| Appearance | Yellowish green crystal powder |
| Purity | ≥99% |
| Melting Point | 201.1-202.2°C |
| Volatility | ≤0.5% |
Physical Data & Fastness Properties
| Ash | ≤0.5% |
| Max Absorption Wavelength | 370nm (in ethanol) |
| Max Emission Wavelength | 437nm (in ethanol) |
| Heat Resistance | Strong |
| Light Fastness | Strong |
| Weather Fastness | Good |
Applications
- EVA foam for footwear
- Polyethylene (PE)
- Polypropylene (PP)
- PVC (polyvinyl chloride)
- Polystyrene (PS)
- ABS plastics
- Synthetic fiber
- Paints
Usage Instructions
Dosage in plastics: 0.01-0.03%, or adjust according to user's need. 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 KCB should be adjusted.
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