Flame Retardant for Cotton (THPC-based Proban Process)
Featured inFlame Retardants
Tetrakis(hydroxymethyl)phosphonium (THPC)-based flame retardant system for the Proban durable flame retardant finish of cotton and cotton-blend fabrics. After pad application and curing with ammonia, THPC polymerizes within the cotton fiber structure to form an insoluble phosphorus-nitrogen network, providing durable flame retardancy that withstands 100+ wash cycles. Meets EN 11612, NFPA 2112, and ATPV arc flash standards.
Technical Specifications
| pH | 3–5 |
| appearance | Colorless to pale yellow liquid |
| durability | ≥100 washes (ISO 6330) |
| active content (%) | ≥75 |
| P content (%, active) | ≥11 |
| viscosity (mPa·s, 25°C) | 20–80 |
Applications
- Durable flame retardant finishing of cotton workwear and protective clothing
- FR finishing of cotton-nylon and cotton-polyester blend fabrics
- Military and firefighter uniform flame retardant treatment
- Arc flash protective fabric finishing for electrical workers
- FR bedding and upholstery finishing for public buildings
Key Features
- Exceptional wash durability: FR performance retained after 100+ washes
- Meets international FR standards EN 11612, NFPA 2112, ATPV
- Phosphorus-nitrogen synergy provides high limiting oxygen index (LOI >28)
- Maintains acceptable fabric hand and tensile strength after application
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