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简体中文Water-Insoluble Ammonium Polyphosphate
-- Steady & Reliable Manufacturer --
Introduction
Early-type ammonium polyphosphate dissolves readily in water, which limits its use in humid environments, outdoor products, and water-based systems. Water-insoluble ammonium polyphosphate refers to crystalline phase II APP with a long polymer chain and very low solubility, often further improved by surface treatment.
Low solubility matters for several reasons. In coatings, it limits viscosity drift and sedimentation over time. In polymers, it reduces water extraction and surface bloom. In finished products, it keeps flame retardancy from washing out when parts are exposed to moisture, rain, or condensation.
We control the degree of polymerization, crystal form, and particle size to deliver consistent solubility from batch to batch, and tighter solubility limits can be offered on request.
Specification
| Parameter | Typical Value |
|---|---|
| Appearance | White powder |
| Chemical Type | Crystalline phase II ammonium polyphosphate |
| Phosphorus (P) Content | 30 to 32% |
| Nitrogen (N) Content | 14 to 15% |
| Degree of Polymerization | n greater than 1000 |
| Water Solubility (10% suspension, 25°C) | 0.1 g/100 mL max (lower limits available) |
| pH (10% aqueous suspension) | 5.5 to 7.5 |
| Particle Size (D50) | 10 to 20 microns |
| Moisture Content | 0.25% max |
| Decomposition Onset | Above 275°C |
| Packaging | 25kg kraft bags with PE liner, 25kg woven bags, or 500kg / 1000kg jumbo bags |
Typical values only. Coated and uncoated versions are available, and solubility targets can be agreed per order. Each shipment includes a certificate of analysis.
Application
Water-insoluble APP is selected where the final product will be exposed to moisture or where water-based processing is involved.
- Water-based intumescent coatings: Interior and exterior paints for steel structures, wood, and boards.
- Polyolefin compounds: PP and PE parts and profiles used in humid or outdoor environments.
- Sealants and adhesives: Fire-rated sealants and construction adhesives.
- Rubber and elastomers: Halogen-free flame retardant for conveyor belts and sealing profiles.
- Textile back-coatings and nonwovens: Fire-retardant finishing where wash-out resistance matters.
Advantages
- Low water solubility: Reduces leaching and extraction in damp, outdoor, or washing conditions.
- Stable viscosity: Less viscosity drift and sedimentation in water-based coatings during storage.
- High thermal stability: Long-chain structure holds up through compounding temperatures.
- Low migration: Less surface bloom over the service life of molded and coated parts.
- Consistent quality: Solubility, particle size, and phosphorus content are tested on every batch.
Manufacturing Facility in XUSEN
We have our own production workshops and warehouses, equipped with complete production and quality inspection equipment.
As China Water-Insoluble Ammonium Polyphosphate Suppliers and Water-Insoluble 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.
