Low Water Soluble Ammonium Polyphosphate

The pain points of high water solubility, easy migration and precipitation, and poor water stability of ordinary apps are becoming increasingly prominent. The low water solubility ammonium polyphosphate produced by Taixing innovatively adopts the core technology of crystalline type II directional polymerization and melamine resin microcapsule encapsulation, constructing a triple system of "dense carbon layer barrier phosphorus nitrogen synergistic flame suppression water resistance protection locking effect". With only 10% -25% addition, the material can achieve UL 94 V-0 flame retardant, completely solving the industry problems of "water loss, surface whitening, and flame retardant failure" in traditional APPs, and providing a long-term and reliable flame retardant solution for the global manufacturing industry.

Core strengths

1. Precise control of low water solubility and excellent water stability performance

-Innovative crystallization type II directional polymerization method: By precisely controlling the reaction temperature and ammonia partial pressure, high crystallinity type II ammonium polyphosphate is synthesized in a directional manner. The polymerization degree is stable at n ≥ 1000, and the solubility in water at 20 ℃ is ≤ 0.5g/100mL, which is more than 80% lower than that of ordinary APP. The water resistance stability is improved from the molecular structure level.

-Microcapsule encapsulation for enhanced protection: Using melamine resin microcapsule encapsulation technology, a uniform and dense protective film is formed on the surface of the particles to isolate moisture from contact with the external environment. After 72 hours of immersion in warm water, the loss rate of flame retardant is ≤ 3%, solving the pain point of flame retardant performance degradation in humid environments.

-Wide temperature range stable adaptation: With a thermal decomposition temperature of ≥ 320 ℃, it can withstand polymer material processing technology below 350 ℃. It can be stored for a long time in an environment of -40 ℃~80 ℃ without moisture absorption or energy decay. It is suitable for harsh use scenarios such as outdoor building materials and automotive parts.

2. Phosphorus nitrogen synergistic high-efficiency flame retardant, excellent carbonization barrier performance

-Triple synergistic flame retardant mechanism: When exposed to fire, it releases high concentration polyphosphate (acid source), catalyzing rapid dehydration and carbonization of the substrate; The released ammonia gas dilutes the concentration of combustible gases with water vapor (gas source); Form a dense honeycomb like carbon layer (carbon source) with an expansion ratio of more than 20 times, efficiently block oxygen heat transfer, and achieve dual protection of "condensed phase+gas phase".

-Low dosage to reduce costs and increase efficiency: Adding 15% to PP plastic can achieve UL 94 V-0 grade; By adding 12% to the expansion type fireproof coating, the fire resistance limit of steel structures can reach more than 1.5 hours, which is 25% -30% less than that of traditional flame retardant systems, balancing flame retardant effect and cost control.

-Zero halogen and low smoke environmental attributes: completely free of harmful substances such as halogens, heavy metals, and free melamine. The smoke density (DS, 4 minutes) during combustion is ≤ 110, and the smoke toxicity reaches the highest safety level of EU EN 13501-1:2024, with no risk of secondary pollution.

3. Excellent compatibility and process adaptability, ensuring product quality assurance

-Interface modification enhances compatibility: By surface activation treatment, the polarity difference between inorganic powder and organic substrate is reduced, and the compatibility with substrates such as PP, PE, epoxy resin, polyurethane is improved by 95%. The dispersion uniformity reaches micrometer level, avoiding the decrease in mechanical properties of products caused by agglomeration.

-Small impact on product performance: After addition, the tensile strength retention rate of PP material is ≥ 92%, the impact strength retention rate of epoxy resin is ≥ 90%, and the adhesion force of the coating meets the GB/T 9286-1998 Level 1 standard, without changing the original color, feel, and performance of the product.

-Multi process adaptation: It can be directly used for various processing techniques such as injection molding, extrusion, spraying, impregnation, etc. The powder has excellent dispersibility, no adhesion or equipment blockage problems, and greatly improves production efficiency.

Application scenarios

Expansion type fireproof coating field

-Application: Steel structure fireproof coating, building curtain wall fireproof coating, tunnel fireproof coating, ship fireproof coating

-Recommended formula: low water-soluble ammonium polyphosphate 12%+expanded graphite 8%+acrylic acid lotion 35%+charring agent 6%+water 39%

-Advantages: The coating has a fire expansion rate of ≥ 20 times, a fire resistance limit of over 1.5 hours, and is resistant to water immersion for 72 hours without bulging or peeling. It meets the GB 14907-2018 steel structure fireproof coating standard.

In the field of plastics and polymer materials

-Applications: PP/PE plastic products, nylon connectors, electronic and electrical enclosures, automotive interior parts, polyurethane foam

-Recommended formula: PP substrate 82%+low water soluble ammonium polyphosphate 15%+pentaerythritol (carbon source) 2%+melamine (gas source) 1%

-Advantages: The product has a thickness of 1.6mm and meets UL 94 V-0 grade, with a tensile strength retention rate of ≥ 92%. There is no surface whitening phenomenon, and long-term use does not result in flame retardant performance degradation.

Building insulation and building materials field

-Application: PIR/PUR thermal insulation foam, flame retardant plywood, fire sealant, flame retardant gypsum board

-Recommended formula: PIR insulation foam: low water-soluble ammonium polyphosphate 10%+isocyanate 45%+polyether polyol 40%+catalyst 5%

-Advantages: the oxygen index of thermal insulation foam is ≥ 32%, reaching the B1 level flame retardant standard, and has excellent moisture and heat aging resistance, which is suitable for the long-term use of the building exterior wall insulation system.

Transportation and other fields

-Application: Automotive wiring harness sheath, rail transit flame retardant material, cable flame retardant layer, forest fire extinguishing agent

-Recommended formula: Cable flame retardant layer: Low water soluble ammonium polyphosphate 20%+EVA substrate 75%+compatibilizer 3%+antioxidant 2%

-Advantages: Passed the IEC 60332-3 bundle flame retardant test, with a vertical combustion level of V-0 and excellent water and corrosion resistance, suitable for outdoor and humid cable use.

If you are looking for low water solubility ammonium polyphosphate, water-resistant APP flame retardant, crystalline type II ammonium polyphosphate, Taixing will be your best partner!