Ammonium Polyphosphate APP has become a cornerstone additive in today's flame-retardant systems, especially in industries that prioritize safety, stability, and environmental compliance. Its advanced performance characteristics and broad compatibility make it a trusted choice for manufacturers of plastics, coatings, textiles, wood materials, adhesives, and intumescent fire-protection coatings. As global safety standards tighten, industries continue to adopt Ammonium Polyphosphate APP to enhance material performance while meeting stringent flame-retardant regulations.
Shandong Taixing Advanced Material Co., Ltd., a professional supplier in chemical flame-retardant additives, provides high-purity and stable-grade Ammonium Polyphosphate APP tailored for various applications. Below is an in-depth product introduction designed to help users understand why this material has become so indispensable.
Ammonium Polyphosphate APP is typically classified into Phase I and Phase II types, each offering different polymerization degrees and thermal-stability characteristics. The Phase II type is widely used for high-efficiency intumescent systems due to its higher polymerization level and better water resistance.
APP stands out because of:
High phosphorus content for strong flame-retardant efficiency
Excellent thermal stability suitable for high-temperature processing
Low water solubility for superior outdoor and long-term performance
Intumescent char-forming capability to create a protective barrier during combustion
These advantages allow Ammonium Polyphosphate APP to be applied across multiple industries where safety and reliability are critical.
Below is a simplified yet professional product-parameter table for Ammonium Polyphosphate APP supplied by Shandong Taixing Advanced Material Co., Ltd. The data reflects typical technical specifications suitable for flame-retardant formulations:
| Parameter | Typical Value | Notes |
|---|---|---|
| Appearance | White powder | Uniform, non-agglomerated |
| P₂O₅ Content (%) | ≥72 | Ensures strong flame-retardant efficiency |
| Nitrogen Content (%) | ≥14 | Contributes to intumescent performance |
| Degree of Polymerization (n) | ≥1000 | Higher value ensures better stability |
| Moisture (%) | ≤0.3 | Enhances storage and processing stability |
| pH (10% aqueous suspension) | 5.5–7.5 | Suitable for various formulations |
| Solubility in Water (25°C) | ≤0.5 g/100 mL | Indicates excellent water resistance |
| Decomposition Temperature | ≥275°C | Suitable for thermoplastic processing |
| Particle Size (μm) | 10–20 or customized | Supports uniform dispersion |
These parameters demonstrate the reliability and performance predictability of Ammonium Polyphosphate APP, allowing formulators to integrate it into coating systems, plastic compounds, and construction materials with confidence.
Ammonium Polyphosphate APP functions primarily through intumescent flame-retardant mechanisms. When exposed to heat, it decomposes to form phosphoric acid, which further reacts to create a carbon-rich char layer. This swollen carbon foam forms a protective shield that:
Blocks heat transfer
Reduces oxygen penetration
Slows down smoke release
Maintains the structural integrity of the substrate
The combination of physical insulation and chemical suppression significantly enhances overall fire resistance.
Industries that benefit most include:
Building materials (coatings, fireproof boards, sealants)
Plastics and elastomers (PP, PE, PVC, EVA, TPU)
Wood and paper treatment agents
Textile and fiber protection systems
Adhesives and sealant formulations
Its non-halogenated nature also makes it environmentally responsible and compatible with global safety regulations.
Materials formulated with Ammonium Polyphosphate APP exhibit significant improvements in fire-resistant performance:
Excellent char expansion providing long-term protection
Enhanced oxygen-index values in polymer formulations
Stable performance in outdoor environments due to low solubility
Improved mechanical properties when used in balanced formulations
Compliance with flame-retardant standards, such as UL94, EN, ASTM, and building codes
Intumescent systems containing APP can reduce fire spread rates, minimize damage, and increase evacuation and rescue time in emergency conditions. End users often highlight the material's stability, ease of formulation, and cost-effectiveness.
As global industries tighten their requirements for fire protection, Ammonium Polyphosphate APP continues to grow in importance. Its benefits include:
Non-toxic, halogen-free formulation, aligning with environmental regulations
High compatibility with other flame-retardant synergists such as melamine and pentaerythritol
Lower smoke and toxic gas production, crucial for indoor applications
Long service life, making it suitable for high-value construction and industrial sectors
This positions APP as one of the most reliable and future-oriented flame-retardant materials available today.
Shandong Taixing Advanced Material Co., Ltd. continues to support global clients with stable quality, consistent supply, and customized technical solutions.
Ammonium Polyphosphate APP is a halogen-free, environmentally responsible solution that offers stable thermal performance and high phosphorus efficiency. It produces an intumescent char layer during combustion, giving better protective performance compared to many conventional additives.
APP works by forming a protective foam-char layer that reduces heat transfer and oxygen diffusion. In coatings, it enhances fire resistance while maintaining good adhesion. In plastics such as PP, PE, EVA, or TPU, it helps achieve higher oxygen-index values and improved fire classifications.
Yes. Phase II APP, especially high-polymerization types, exhibits very low water solubility. This ensures long-term stability even in outdoor applications such as construction coatings, wood protection, and exterior sealants.
You can contact Shandong Taixing Advanced Material Co., Ltd., a professional producer offering high-purity APP with stable specifications, excellent dispersibility, and customized support for different industries.
For high-quality Ammonium Polyphosphate APP, product consultation, or customized formulations, feel free to reach out to:
Shandong Taixing Advanced Material Co., Ltd.
Professional Flame-Retardant Material Supplier
We look forward to supporting your project and providing stable, reliable flame-retardant solutions.
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