FBA 393 (Optical Brightener OB-1)
PHYSICAL PROPERTIES
| (Item) | (Specification) |
| (Appearance) | (Bright yellow crystalline powder) |
| (Melting Point, ℃) | 352～358 |
| (Purity, %) | ≥99.0% |
| (Volatile Content, %) | ≤0.5% |
| (Particle Size, ≥325 mesh pass rate) | ≥99.0% |
| (Max. Absorption Wavelength, nm) | 374 ± 2 |
| (Max. Emission Wavelength, nm) | 440 ± 2 |
| (Ash Content, %) | ≤0.5% |
| (Recommended Dosage for PVC, phr) | 0.006～0.018 (Based on 100 parts PVC resin) |
Raw Materials & Manufacturing Process
Main Raw Materials:
Benzoxazole aldehyde, p-xylylene diphosphonate, sodium methoxide / sodium tert-butoxide, DMF / xylene solvents
Manufacturing Process:
The product is synthesized via a Wittig condensation reaction. Cyclization and structural transformation are completed under high-temperature conditions.
Afterward, the product undergoes crystallization, alcohol washing, and deep purification through recrystallization, followed by drying and pulverization to obtain a high-melting-point finished product.
Safety & Environmental Performance
- उत्कृष्ट high-temperature resistance with very low volatility
- Non-toxic and odorless
- Free from heavy metals
- Complies with EU RoHS and REACH regulations
- Classified as a non-hazardous chemical
Applications
High-temperature PVC applications:
- Rigid PVC products for high-temperature processing
- Special-purpose pipes
- Engineering profiles
- Heat-resistant films
- Modified PVC for synthetic fiber applications
Other applications:
- PET bottle flakes
- Polyester fibers
- High-temperature engineering plastics such as PA and PC
- BOPET films
Key Features & Advantages
- Ultra-High Melting Point:
Suitable for ultra-high-temperature PVC processing with excellent thermal stability - Strong Whitening Performance:
Pure optical tone with excellent resistance to weathering and aging, no yellowing over long-term use - Extremely Low Volatility:
Does not contaminate molds or cause deposits, extending mold cleaning cycles - Excellent Resistance to Migration & Extraction:
Ideal for high-end and export-grade PVC products
Packaging, Storage & Shelf Life
Packaging:
- 25 kg fiber drum
Storage:
Store in a dry, sealed, and light-protected environment
Transportation:
Transport as non-hazardous chemical goods
Shelf Life:
12 months from the date of manufacture
