Optical Brightening Agent (OBA)
CAS Number: 4404-43-7
Optical brightening agents (OBAs) are fluorescent dyes that absorb ultraviolet light and re-emit it as visible blue light, compensating for the yellowish tint of plastics and making them appear whiter and brighter. They are widely used in polyolefins, PVC, ABS, and engineering plastics. OBAs for plastics must be thermally stable at processing temperatures typically above 200°C.
Technical Specifications
| purity | ≥99% |
| appearance | Pale yellow to greenish-yellow fine powder |
| melting point | 355–360°C |
| recommended dosage | 0.01–0.05% |
| fluorescence intensity | ≥450 (vs. standard) |
Applications
- White and light-colored PVC pipes and profiles
- Polyolefin films and molded goods
- ABS and HIPS consumer electronics housings
- Synthetic fibers (polyester, nylon) brightening
- Laundry detergent and paper brightening
Key Features
- High fluorescence intensity for outstanding whitening effect at low dosage
- Excellent thermal stability suitable for engineering plastic processing
- Provides bluish-white tone that counteracts yellowness index
- Compatible with most plastic color concentrates and masterbatches
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CAS Number
4404-43-7
Category
Plastic / Rubber AdditivesAvailability
In StockSample
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