Organophosphorus Flame Retardant for Viscose Fiber (Solid)
Halogen-free organophosphorus flame retardant engineered specifically for viscose fiber (rayon) manufacturing. Supplied as a white crystalline solid with a melting point of 228–229°C, it integrates directly into the viscose spinning dope without requiring process adjustment. The product delivers durable flame retardancy that survives repeated laundering and stringent dry-cleaning conditions, making it the preferred choice for FR viscose yarns, nonwovens, and technical textiles. The modified thiophosphate ester chemistry is APEO-free and halogen-free, meeting EU REACH and OEKO-TEX Standard 100 requirements. Low pyridine content (<30 ppm) ensures minimal odor and minimal impact on the whiteness and light stability of finished fabrics. Compatible with standard viscose wet-spinning and downstream dyeing processes.
Technical Specifications
| Purity | ≥ 98% |
| Appearance | White solid |
| Oil Content | ≤ 0.2% |
| Melting Point | 228–229 °C |
| Pyridine Content | ≤ 30 ppm |
| Flame Retardant Type | Halogen-free organophosphorus |
Applications
- FR viscose fiber and rayon yarn production
- Flame-retardant nonwoven fabrics
- FR technical textiles and workwear fabrics
- Protective apparel liners
- Upholstery and curtain fabrics requiring FR certification
- Blended FR yarns (viscose/polyester, viscose/cotton)
Key Features
- Halogen-free — compliant with EU REACH, RoHS and OEKO-TEX Standard 100
- Highly stable under acidic, alkaline, and oxidizing/reducing conditions
- APEO-free formulation with excellent environmental and health profile
- No process adjustment required for standard viscose wet-spinning lines
- Negligible effect on fabric whiteness, hand feel, and light stability
- Durable FR performance — wash-resistant and dry-clean resistant
- No negative impact on downstream dyeing, printing, or finishing
- Low pyridine content (≤30 ppm) — low odor