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简体中文Melamine-Coated Ammonium Polyphosphate
-- Steady & Reliable Manufacturer --
Introduction
Uncoated ammonium polyphosphate performs well as a flame retardant but can be sensitive to moisture and can interact with other additives in the formulation. Melamine-coated ammonium polyphosphate places a melamine based layer on the surface of each APP particle, creating a more stable and more compatible powder for demanding polymer and coating systems.
Melamine is a natural partner for APP, since it acts as a gas source in intumescent chemistry. Placing it directly at the particle surface improves compatibility with resin matrices, reduces water solubility, and cuts down on moisture pick-up during storage and processing. The result is a free-flowing powder that disperses easily and keeps its performance through compounding.
Our melamine-coated grades are made from phase II APP with a high degree of polymerization, selected for good heat resistance and low solubility.
Specification
| Parameter | Typical Value |
|---|---|
| Appearance | White free-flowing powder |
| Chemical Type | Crystalline phase II APP with melamine based surface coating |
| Phosphorus (P) Content | 27 to 30% |
| Nitrogen (N) Content | 15 to 18% |
| Water Solubility (10% suspension, 25°C) | 0.1 g/100 mL max |
| Particle Size (D50) | 10 to 20 microns |
| Moisture Content | 0.3% max |
| pH (10% aqueous suspension) | 5.5 to 7.5 |
| Decomposition Onset | Above 275°C |
| Packaging | 25kg kraft bags with PE liner, 25kg woven bags, or 500kg / 1000kg jumbo bags |
Typical values only. Coating level and exact specification vary by product code. A certificate of analysis is included with every shipment.
Application
Melamine-coated APP is chosen when the formulation benefits from added nitrogen at the particle surface and lower moisture sensitivity.
- Polyolefins: PP, PE, and EVA compounds for profiles, sheets, and cable materials.
- Epoxy resin systems: Coatings, laminates, and electronic encapsulation.
- Intumescent paints: Water-based and solvent-based coatings for steel and wood.
- Polyurethane foams and sealants: Fire-rated foams, adhesives, and joint fillers.
- Rubber and elastomer compounds: General-purpose halogen-free flame retardant additive.
Advantages
- Built-in synergy: Melamine at the particle surface supports gas generation and char expansion in intumescent systems.
- Lower moisture sensitivity: Reduced water absorption and extraction help in humid climates and long storage.
- Easy dispersion: Free-flowing, less dusty powder that blends more evenly into polymers and resins.
- Stable processing: Good heat resistance during compounding, with less risk of premature acid release.
- Halogen-free: Suitable for low-smoke, non-corrosive formulations.
Manufacturing Facility in XUSEN
We have our own production workshops and warehouses, equipped with complete production and quality inspection equipment.
As China Melamine-Coated Ammonium Polyphosphate Suppliers and Melamine-Coated Ammonium Polyphosphate Factory., With over 20 years in developing halogen-free flame-retardant products positions us as industry leaders in providing domestic flame-retardant solutions.
All our products comply with the stringent requirements of the WEEE, ROHS, and EUP directives.
Rubber and Plastic Industry
Suitable for materials such as PA, PP, polyester, elastomers, PE, EVA, PC, ABS, etc., widely used in household appliances, automobiles, electricians, cables, and other products.
Composite Materials Field
Suitable for composite flame retardant products based on epoxy resin, polyurethane, etc., we can jointly develop flame retardant products with users to meet the requirements of flame retardancy and physical properties.
Adhesive Field
Suitable for oil-based and water-based adhesives, and can be modified according to customer needs to adapt to user usage conditions and requirements, while maintaining good weather resistance and dispersibility.
Fabric coating field
It is applicable to the flame retardant fabric coating based on acrylic lotion. The formula and process can be adjusted according to the user's requirements for flame retardancy, sizing amount, hand feel, etc. to meet the requirements for flame retardancy and physical properties.
Fireproof coatings field
In fireproof coatings, flame retardants are mainly used in APP. We have undergone specific processing techniques for coating APP, which can meet the quality requirements of well-known international manufacturers such as PPG and ICI.
