Ammonium Polyphosphate (APP-II)
| ITEM | UNIT | STANDARD |
|---|---|---|
| Phosphorus | % (w/w) | ≥31 |
| Nitrogen | % (w/w) | ≥14 |
| pH value (10% suspension) | 5.5-7.5 | |
| Water content | % (w/w) | ≤0.25 |
| Thermal decomposition | °C | ≥275 |
| Viscosity (25°C, 10% suspension) | mPa. s | ≤50 |
| Solubility | g/100cm3 water | ≤0.5 |
| Average particle size | μm | ≤20 |
Product description:
Ammonium Polyphosphate (APP Phase II) is a high-performance, non-halogenated flame retardant renowned for its superior thermal stability and low water solubility. As an environmentally responsible solution, it remains non-toxic and non-corrosive during processing. In the event of a fire, it significantly suppresses smoke density and prevents the release of toxic gases, making it a critical component for meeting modern safety and environmental standards.
How It Works:
APP functions primarily through a condensed-phase mechanism. Upon exposure to heat, it promotes the formation of a robust, protective carbonaceous char layer. This layer acts as a thermal barrier, insulating the substrate from oxygen and heat, which effectively halts the spread of flames and maintains the structural integrity of the material.
Key Applications:
- Intumescent Fire-Retardant Coatings:
APP is an essential active ingredient in intumescent coatings for steel structures and high-rise buildings. It provides a reliable insulation barrier during fire emergencies, protecting critical infrastructure. - Plastics and Polymers:
It is highly effective in polyolefins such as polypropylene (PP) and polyethylene (PE). APP is frequently integrated into halogen-free formulations to achieve rigorous fire-safety ratings without compromising the physical properties of the polymer. - Construction and Insulation Materials:
APP enhances the fire resistance of insulation boards, sealants, and roofing materials, ensuring compliance with global building safety codes and improving overall residential and industrial safety. - Adhesives, Sealants, and Textiles:
It provides versatile flame retardancy for industrial adhesives and fabric finishing systems. APP helps maintain the performance and safety of finished products across the textile and chemical sectors. - Wire and Cable Compounds:
Specifically suited for halogen-free wire and cable applications, APP helps reduce flame spread and smoke generation in high-density electrical environments.
Safety and Handling:
Toxicology: APP is classified as low-toxicity. The acute oral LD50 (rat) is ≥2000 mg/kg, ensuring a safer handling environment for manufacturing personnel.
Environmental Impact: Halogen-free and heavy-metal-free, supporting green manufacturing initiatives.
Storage and Packaging:
Storage Guidelines: To maintain product efficacy, store in a cool, dry, and well-ventilated area at room temperature. Keep containers tightly sealed to prevent moisture absorption.
Standard Packaging: Standard supply is 25 kg woven bags with PE liners.
Custom Solutions: Custom packaging and bulk shipping options are available upon request to meet specific logistics and production requirements.
Frequently Asked Questions
