Weather Resistance [NH4PO3]n Intumescent Fire Retardant

Place of Origin CHINA
Brand Name Taifeng
Certification ISO9001, REACH, SGS
Model Number TF-MF201
Packaging Details 25kg/bag, 24mt/20'fcl without pallets, 20mt/20'fcl with pallets
Delivery Time 10-15days
Payment Terms D/P, T/T
Supply Ability 100mt/ month

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Product Details
Raw Material Ammonium Polyphosphate Modified Material Melamine Formaldehyde Resin
P ≥30.5% Solubility(25℃, G/100ml) ≤0.05
Solubility(60℃, G/100ml) ≤0.2 Solubility(80℃, G/100ml) ≤0.8
Stability Extremely Good Coated MF Coated
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[NH4PO3]n Intumescent Fire Retardant


Weather Resistance Intumescent Fire Retardant


Weather Resistance [NH4PO3]n

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Product Description

Intumescent Fire Retardant For Top Coatings With Extremely Weather Resistance


TF-MF201 is a product based on ammonium polyphosphate phase II, it's modified by melamine-formaldehyde resin. Therefore the fine white powder of TF-MF201 shows very low solubility in water, even at elevated temperatures, compared to normal ammonium polyphosphate. TF-MF201 is completely insoluble in organic solvents. 


Characteristics Unit Target value Test method
Chemical Formula   [NH4PO3]n
n > 1000
Phosphorus % (w/w) 29.0 - 31.0 Photometry after oxidizing dissolution; (11/17)
Water / Moisture % (w/w) max. 1.0 Thermogravimetry at 130 °C; (11/03)
Nitrogen % (w/w) 15.0 - 17.0 Elemental analysis; (11/07)
Density g/cm³ 1.9 at 25 °C
Bulk Density g/cm³ approx. 0.9  
Viscosity mPa*s max. 20 at 25 °C in 10 % aqueous suspension
pH Value   6.5 - 8.5 Potentiometry in 10 % aqueous suspension; (11/12)
Solubility in Water % (w/w) max. 0.05 Gravimetry after filtration of a 10 % aqueous suspension at 25 °C; (11/41)
Acid Number mg KOH/g max. 0.5 Titration using alkali in 10 % aqueous suspension; (11/11)
Average Particle Size (D50) µm approx. 20  


Intumescent coatings
On account of its low water solubility, TF-MF201 is particularly suitable as an ”acid donor” for intumescent coatings. TF-MF201 can be used advantageously in intumescent coatings where the ammonium polyphosphate is required to have extremely low water solubility and where lower heat stability at temperatures above 300 °C contributes to more rapid foaming of the coating.



How does fire retardant flame retardant work?


Ammonium polyphosphate has a key useful property - flame retention due to thermal expansion. Paint that protects against fire swells when exposed to high temperatures, and polyphosphate acid appears on the substrate (metal, wood). It is a product of dehydration and heating. If we are talking about a surface of organic matter, then a carbon film is formed. It does not allow the flame to spread. It works like this - a large volume of non-combustible gases is generated, a thick foam appears, which acts as a layer of thermal insulation, and as a result, the material is protected from air and ceases to heat up.


When fire retardant paint burns, it emits soft smoke. It contains very few toxic gases, so the coating is classified as non-hazardous. For paint, which includes such a flame retardant, the price is determined by its other components and the resulting properties. The material meets all the requirements of passive fire protection, which are presented to modern compositions.


Structural Steel Fire Protection | Intumescent Coating & Boarding ...


Weather Resistance [NH4PO3]n Intumescent Fire Retardant 1