FBA 368 (Optical Brightener KSN)
PHYSICAL PROPERTIES
| (Item) | (Specification) |
| (Appearance) | (Light yellow crystalline powder) |
| (Melting Point, ℃) | 271～275 |
| (Purity, %) | ≥99.0% |
| (Volatile Content, %) | ≤0.5% |
| (Particle Size, ≥325 mesh pass rate) | ≥99.0% |
| (Max. Absorption Wavelength, nm) | 372 ± 2 |
| (Max. Emission Wavelength, nm) | 438 ± 2 |
| (Ash Content, %) | ≤0.5% |
| (Recommended Dosage for PVC, phr) | 0.015～0.035 (Based on 100 parts PVC resin) |
Raw Materials & Manufacturing Process
Main Raw Materials:
5-methyl-o-aminophenol, 4,4′-stilbenedicarboxylic acid, boric acid catalyst, trichlorobenzene solvents
Manufacturing Process:
4,4′-stilbenedicarboxylic acid is first subjected to acyl chlorination, followed by high-temperature condensation cyclization with 5-methyl-o-aminophenol.
The product is then deeply purified through recrystallization, followed by drying, pulverization, and sieving to obtain a high-purity finished product.
Safety & Environmental Performance
- Excellent high-temperature resistance with low volatility
- No release of toxic or harmful substances
- Free from heavy metals
- Complies with EU RoHS and REACH regulations
- Classified as a non-hazardous chemical
Applications
High-end PVC applications:
- Premium PVC profiles
- uPVC doors and window profiles
- Outdoor fences
- Exterior wall cladding
- High-gloss boards
- Transparent rigid PVC products
Other applications:
- Engineering plastics such as PA, PC, PET, ABS
- Synthetic fiber films
Key Features & Advantages
- Outstanding Heat Resistance:
Suitable for high-temperature and high-speed PVC extrusion without decomposition or discoloration - Excellent Weather Resistance:
Long-term outdoor use without yellowing, chalking, or degradation - Stable and Long-Lasting Whiteness:
Pure optical tone enhances premium appearance of products - Good Compatibility:
Compatible with PVC and various fillers without affecting mechanical properties
Packaging, Storage & Shelf Life
Packaging:
- 25 kg fiber drum
Storage:
Store in a cool, dry, and light-protected environment, tightly sealed
Transportation:
Transport as non-hazardous chemical goods
Shelf Life:
12 months from the date of manufacture
