Ultra High Molecular Weight Ammonium Polyphosphate

Traditional flame retardants face industry pain points such as insufficient polymerization degree, poor water stability, weak compatibility, and insufficient protection against thermal runaway. The ultra high molecular weight ammonium polyphosphate produced by Taixing innovatively adopts shock wave induced polymerization+supramolecular assembly composite coating core technology to construct a triple strengthening system of "ultra long chain catalytic carbonization dense expansion barrier gas phase synergistic flame suppression". With only 8% -20% addition, the material can achieve UL 94 V-0 flame retardancy, completely solving the key problems of traditional APP "moisture absorption migration, loose carbonization, and high-temperature performance degradation", and providing a flame retardant solution that combines ultimate performance and compliance protection for high-end manufacturing industries worldwide.

Core strengths

1. Ultra high molecular weight long chain, peak water resistance and stability performance

-Innovative shock wave induced polymerization method: Breaking through the bottleneck of traditional melt polymerization, using low polymerization degree APP as raw material, stable mass production of polymerization degree n=1500-3000 is achieved through precise control of shock wave energy and reaction atmosphere. The crystallinity is as high as 99%, and the solubility in water at 20 ℃ is ≤ 0.3g/100mL. Compared with ordinary high polymerization degree APP (n=1000), the water resistance is improved by 200%, meeting the requirements of long-term humid or outdoor service scenarios.

-Ultimate weather resistance and migration resistance: After being placed in a humid and hot environment of 85 ℃/85% RH for 2000 hours, there is no moisture absorption or agglomeration, and no migration or precipitation. After soaking in cold and hot water for 2 weeks, the flame retardant performance deteriorates by ≤ 3%, and the thermal decomposition temperature is ≥ 330 ℃. It can withstand the processing technology of high-end engineering plastics below 350 ℃ without toxic gas release.

-Excellent chemical stability: insoluble in non-polar organic solvents such as ethanol and ether, only soluble in strong oxidizing acids, and does not undergo chemical reactions when mixed with substrates such as resin and rubber, ensuring consistent performance of the product for long-term use.

2. Supramolecular assembly and encapsulation, with excellent compatibility and carbonization properties

-Innovative supramolecular layer assembly and coating technology: A double-layer structure of "inorganic silane reinforcement layer+organic melamine formaldehyde resin char layer" is constructed on the surface of particles, and the coating layer is tightly bonded to the core material through supramolecular forces. The compatibility with organic substrates is improved by 98%, and the dispersion uniformity reaches the nanometer level, completely solving the product defects caused by traditional APP aggregation.

-Catalytic Dense Expanded Carbon Layer: At high temperatures, the ultra-high molecular weight long-chain structure and coating layer work together to rapidly dehydrate and carbonize the catalytic substrate, forming a honeycomb like dense carbon layer with a thickness 20-30 times that of the original material. The thermal conductivity is ≤ 0.1W/(m · K), and the oxygen thermal barrier efficiency is increased by 80% compared to ordinary APP, effectively suppressing droplet and flame spread.

-Non destructive adaptation of mechanical properties: tensile strength retention rate of PP material after addition ≥ 95%, impact strength retention rate of epoxy resin ≥ 92%, compression resilience rate of polyurethane foam ≥ 90%, no need to add additional dispersants, perfect balance between flame retardancy and product structural strength.

3. Phosphorus nitrogen synergistic efficiency, low addition, environmental protection and safety

-Triple synergistic flame retardant mechanism: ultra-high molecular weight long-chain pyrolysis releases high concentration polyphosphate (acid source), which efficiently catalyzes the formation of carbon from the substrate; The released ammonia gas dilutes the concentration of combustible gases with water vapor (gas source); The dense carbon layer (carbon source) physically blocks oxygen and heat transfer, while the decomposition products of melamine quench combustion free radicals, achieving a comprehensive protection of "condensed phase+gas phase".

-Low addition amount reduces costs and increases efficiency: Adding 12% to PP material can achieve 1.6mm UL 94 V-0 grade, and the maximum heat release rate is reduced to below 220kW/m ²; Adding 10% to special fireproof coatings can achieve a fire resistance limit of 2.0 hours for steel structures, reducing the dosage by 30% -40% compared to ordinary APP additives and significantly reducing formulation costs.

-Zero halogen, low smoke, low toxicity: completely free of harmful substances such as halogens, heavy metals, PFAS, etc. When burned, the smoke density (DS, 4 minutes) is ≤ 100, and the smoke toxicity reaches the highest safety level of EU EN 13501-1:2024. There is no release of dioxins or hydrogen halides, which is in line with the global trend of environmental protection and flame retardancy.

Application scenarios

High end engineering plastics and electronic and electrical fields

-Applications: PP/PE high-end electrical enclosures, PA nylon connectors, epoxy resin PCB substrates, insulation components for new energy battery packs, aerospace lightweight materials

-Recommended formula: PP substrate 85%+ultra-high molecular weight ammonium polyphosphate 12%+pentaerythritol (carbon source) 2%+melamine (gas source) 1%

-Advantages: With a thickness of 1.6mm and UL 94 V-0 rating, the dielectric performance is stable (volume resistivity ≥ 10 ¹⁵Ω· cm), and the processing flowability is good. It has passed RoHS 2.0 and REACH full compliance, meeting the stringent requirements of high-end electronic appliances and aerospace materials.

Special fireproof coatings and building materials field

-Application: Special fireproof coating for steel structures, high-end flame-retardant coating for wood, flame-retardant gypsum board, high-end building curtain wall materials

-Recommended formula: acrylic lotion 65%+ultra-high molecular weight ammonium polyphosphate 10%+expanded graphite 6%+carbon forming auxiliary 9%+auxiliary 10%

-Advantages: The expanded carbon layer is dense and tough, with a fire resistance limit of over 2.0 hours, excellent resistance to moisture and heat aging, and meets the GB 8624-2012 A-level flame retardant standard. The coating has no odor, no yellowing, strong adhesion, and is suitable for high-end building and industrial facility fire protection needs.

New energy and rubber field

-Application: EVA cable sheath, polyurethane foam, automobile rubber seal, new energy battery pack flame retardant gasket, photovoltaic inverter shell

-Recommended formula: EVA base material 78%+ultra-high molecular weight ammonium polyphosphate 17%+compatibilizer 3%+anti-aging agent 2%

-Advantages: Passed the IEC 60332-3 bundle flame retardant test, with a limit oxygen index (LOI) of ≥ 35% and an elastic recovery rate of ≥ 93%. Its weather resistance meets long-term outdoor use and is suitable for the strict requirements of new energy, high-end cables, and other fields.

Special textiles and other fields

-Application: Flame retardant cotton fabric, polyester fabric, high-end furniture bonding material, forest fire extinguishing agent, water treatment agent

-Recommended formula: Textile flame retardant finishing solution: ultra-high molecular weight ammonium polyphosphate 10%+urea 3%+environmentally friendly adhesive 6%+water 81% (diluted 500 times by immersion rolling)

-Advantages: The textile has a flame retardant time of less than 2 seconds, meets the GB 50222-2017 flame retardant standard, and has a soft touch without "frosting"; Fire extinguishing agents have high fire extinguishing efficiency and no secondary pollution; In water treatment, it can be combined with calcium and magnesium ions to prevent scaling, and has strong adaptability to multiple scenarios.

If you are looking for ultra-high molecular weight ammonium polyphosphate, long-chain ammonium polyphosphate, and high-end fire-resistant coating flame retardants, Taixing will be your best partner!