Tetrakis(hydroxymethyl)phosphonium Sulfate (THPS)
Tetrakis(hydroxymethyl)phosphonium sulfate (THPS) is a reactive organophosphorus flame retardant and biocide widely used for durable flame retardant finishing of cotton and cotton-blend textiles. It forms a cross-linked three-dimensional phosphorus network within cellulose fiber upon curing, providing wash-durable flame retardancy that withstands 50+ industrial launderings. THPS-treated fabrics meet EN ISO 15025, EN 11611, and NFPA 701 standards required for protective workwear.
Teknik Özellikler
| pH (neat) | 2.0–4.0 |
| appearance | Colorless to pale yellow liquid |
| water solubility | Miscible |
| phosphorus content (%) | 11–12 |
| active THPS content (%) | 75–80 |
| specific gravity (20°C) | 1.35–1.40 |
Uygulama Alanları
- Durable flame-retardant finishing of cotton workwear and protective clothing
- Military and defense FR fabric treatment meeting NATO and MIL-SPEC requirements
- Industrial fire-retardant uniforms for oil and gas, electrical, and chemical industries
- Cotton theatrical and stage curtain FR treatment
- Biocidal treatment of oilfield injection water as secondary application
Ürün Özellikleri
- Reactive cross-linking mechanism provides wash-durable FR performance surviving 50+ industrial laundry cycles
- Low add-on levels (15–20% on fabric weight) with minimal handle change versus untreated fabric
- Meets EN ISO 15025 and EN 11611 standards for protective workwear in high-risk industries
- Dual-function product: FR finishing and biocidal activity in oilfield water treatment applications
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