HOFNIL-FR A2
Ammonium polyphosphate II
A widely used flame retardant, valued in paints, coatings, textiles and polymer manufacturing.
Ammonium polyphosphate (APP) flame retardant
HOFNIL-FR A2 and HOFNIL-FR A2M are ammonium polyphosphate (APP) flame retardants made by SK Minerals & Additives Ltd., manufacturer in India. FR A2 is ammonium polyphosphate II; FR A2M is ammonium polyphosphate with a melamine coating. Formulators of paints, coatings, textiles and polymers use them. Ask for a data sheet, sample or quote.
- Grades
- HOFNIL-FR A2, FR A2M
- Chemistry
- Ammonium polyphosphate (APP)
- For
- Coatings, textiles, polymers
What ammonium polyphosphate is, and who buys it
Ammonium polyphosphate (APP) is a polymeric compound of ammonia and polyphosphoric acid. It is a halogen-free flame retardant, widely used in paints, coatings, textiles and polymer manufacturing.
As general background, APP is usually the acid source in an intumescent system: heated together with a carbon source and a gas-releasing compound such as melamine, it helps the material swell into an insulating char. How a grade performs in your formulation depends on the rest of the system.
HOFNIL-FR A2 is ammonium polyphosphate II. HOFNIL-FR A2M is ammonium polyphosphate with a melamine coating, which improves thermal stability and water resistance. Both are halogen-free standalone additives for formulators who build their own flame retardant system.
This is one of our standalone flame retardant additives. Coating formulators can also see our flame retardant for intumescent coatings.
APP grades
HOFNIL-FR A2M
Melamine-coated ammonium polyphosphate
Ammonium polyphosphate with a melamine coating that improves thermal stability and water resistance.
- Extremely low water solubility, completely insoluble in organic solvents.
- Non-hygroscopic and non-flammable.
- Improved powder flow.
Where APP is used
Paints and coatings
Flame retardant for paint and coating formulations.
Textiles
Flame retardant finishing for textiles.
Polymers
Flame retardant for polymer manufacturing. FR A2M is also listed on our polyethylene page.
Forest fire retardants
FR A2 is offered to formulators of forest fire retardants.
Documents
Download what is published, or ask for a technical data sheet (TDS) or safety data sheet (SDS) and we will send it by email.
Questions buyers ask
What is ammonium polyphosphate used for?
Ammonium polyphosphate is widely used as a flame retardant in paints, coatings, textiles and polymers. Tell us your application and we will suggest a grade.
What is the difference between HOFNIL-FR A2 and FR A2M?
HOFNIL-FR A2 is ammonium polyphosphate II. HOFNIL-FR A2M is ammonium polyphosphate with a melamine coating that improves thermal stability and water resistance.
Can I get an ammonium polyphosphate price?
Price depends on the grade, pack and quantity, so we quote on request. Use the enquiry button and tell us the quantity you need.
Related products
From our flame retardant additives range.
Zinc borate
HOFNIL-ZB: boron-based zinc borate for polymers and rubber.
Melamine cyanurate (MCA)
HOFNIL-FR 255: halogen-free MCA for nylon, TPU and PBT.
Standalone flame retardant additives
MCA, APP, zinc borate and red phosphorus masterbatch.
Related reading
Ammonium polyphosphate (APP)
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