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Halogen Free Flame Retardant APP Phase II

Halogen Free Flame Retardant
December 25, 2025
Category Connection: Halogen Free Flame Retardant
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Tags:
#68333-79-9 Halogen Free Flame Retardant #Water Soluble Halogen Free Flame Retardant #Phosphorus Nitrogen Flame Retardant
Brief: This video provides a brief case-style overview of how Halogen Free Flame Retardant Ammonium Polyphosphate Phase II (TF-201) enhances steel fire protection. You will see how this intumescent coating component works with melamine and pentaerythritol to form a protective carbon layer, absorbing heat and stopping heat transfer to meet building design requirements.
Related Product Features:
  • Halogen-free ammonium polyphosphate (APP) serving as the acid donor in intumescent flame retardant systems.
  • Suitable for both water-based and solvent-based coatings with customizable addition volumes and formulas.
  • Decomposition temperature exceeding 275°C, ensuring stability and performance under high heat.
  • Low solubility in water (less than 0.45% at 25°C) for improved durability in various environments.
  • White powder appearance with an average particle size (D50) of 15–25µm for easy mixing and application.
  • Contains high P2O5 content (≥71%) and nitrogen (≥14%) for effective flame retardancy and carbon layer formation.
  • Neutral pH range (5.5–7.5) and low viscosity in solution for compatibility with diverse coating formulations.
  • Long shelf life of over 2 years when stored in well-sealed conditions to maintain product integrity.
FAQs:
  • What is the role of Ammonium Polyphosphate Phase II in intumescent coatings?
    Ammonium Polyphosphate (TF-201) acts as the acid donor in the intumescent system. When heated, it works with melamine (gas donor) and pentaerythritol (carbon donor) to form a protective, insulating carbon layer that expands, absorbs heat, and prevents flame spread.
  • Is TF-201 suitable for both water-based and solvent-based coatings?
    Yes, TF-201 is formulated to be compatible with both water-based and solvent-based intumescent coatings. The addition volume and specific formula can be adjusted based on your application needs; reference formulas are available upon request.
  • What is the decomposition temperature of TF-201, and why is it important?
    TF-201 has a decomposition temperature above 275°C. This high thermal stability ensures that the flame retardant remains effective during the initial stages of a fire, contributing to the formation of the intumescent carbon layer that protects steel structures from rapid strength loss at elevated temperatures.
  • How should TF-201 be stored, and what is its shelf life?
    TF-201 should be stored in a well-sealed environment to prevent moisture absorption. Under these conditions, it has a shelf life of more than 2 years, maintaining its performance and specification integrity over time.
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