Flame Retardant Ammonium Polyphosphate

Traditional apps face industry pain points such as low aggregation, poor water resistance, moisture absorption and migration, insufficient compatibility with substrates, and loose carbonization. The flame retardant ammonium polyphosphate (APP) produced by Taixing innovatively adopts the core technology of ultra-high molecular weight polymerization+nano zirconium phosphate PEI composite coating, and constructs a triple synergistic flame retardant system of "catalytic carbonization expansion barrier free radical quenching". With a phosphorus content of ≥ 31% and a nitrogen content of ≥ 14.5%, the material can achieve UL 94 V-0 flame retardant with only 10% -25% addition, completely solving the problem of "weak stability, narrow adaptability, and large performance loss" of traditional APPs, and providing a flame retardant solution that combines environmental compliance and ultimate performance for the global manufacturing industry.

Core strengths

1. Ultra high molecular weight polymerization leads to a significant increase in water resistance and stability performance

-Innovative high-temperature melt polymerization method: Breaking through the bottleneck of traditional polymerization technology, the polymerization degree is precisely controlled at n ≥ 1000 (Type I APP), the crystallinity is over 98%, the solubility in water at 20 ℃ is ≤ 0.5g/100mL, and the water resistance is 300% higher than that of ordinary APP (n<50).

-Ultimate weather resistance and migration resistance: After being placed in a humid and hot environment of 85 ℃/85% RH for 1500 hours, there is no moisture absorption or agglomeration, and no migration or precipitation. This solves the problem of flame retardant performance degradation caused by hydrolysis migration in traditional apps and is suitable for long-term service scenarios such as outdoor building materials and cable sheaths.

-Excellent thermal stability over a wide temperature range: 1% thermal weight loss temperature ≥ 320 ℃, entering the high-efficiency decomposition stage at 400 ℃, processing temperature window covering 200-350 ℃, matched with multiple processing technologies such as plastic injection molding, coating curing, rubber vulcanization, etc., with no toxic gas release at high temperatures.

2. Nano composite coating modification, with excellent compatibility and carbonization properties

-Innovative nano zirconium phosphate PEI double-layer coating technology: By using electrostatic adsorption to construct a "PEI affinity layer+zirconium phosphate reinforcement layer" on the surface of APP particles, the compatibility with organic substrates is improved by 90%, completely solving the problem of product defects caused by uneven dispersion and agglomeration of traditional APP.

-Catalytic dense expanded carbon layer: The high carbon content of PEI synergizes with the solid acid effect of zirconium phosphate to catalyze the dehydration of the substrate into carbon, forming a dense honeycomb shaped expanded carbon layer with a thickness 10-20 times that of the original coating. The thermal conductivity is ≤ 0.15W/(m · K), and the oxygen heat transfer efficiency is improved by 60%.

-Controllable loss of mechanical properties: After addition, the tensile strength retention rate of PP/PE material is ≥ 92%, and the impact strength retention rate of epoxy resin is ≥ 88%, without the need for additional dispersants, balancing flame retardancy and product structural strength requirements.

3. Phosphorus nitrogen synergistic flame retardant, efficient, low additive, environmentally friendly and safe

-Triple synergistic flame retardant mechanism: Under high temperature, APP decomposes and releases phosphoric acid (acid source), catalyzing the carbonization of the substrate to form a carbon layer; The released ammonia gas dilutes the combustible gas with water vapor (gas source); The expanded carbon layer (carbon source) physically blocks oxygen heat transfer, while PEI and zirconium phosphate synergistically quench combustion free radicals, achieving a "gas-phase+condensed phase" full dimensional flame retardant.

-Low dosage reduces costs: Adding 15% to PP material can achieve 1.6mm UL 94 V-0 grade; Adding 12% to the expansion type fireproof coating can maintain the steel structure in an 800 ℃ flame for 1.5 hours without collapsing, reducing the amount added by 25% -30% compared to ordinary APP.

-Zero halogen, low smoke, and low toxicity properties: completely free of halogens PFAS、 Harmful substances such as heavy metals have a smoke density (DS, 4 minutes) of ≤ 120 during combustion, and the smoke toxicity reaches the highest safety level of EU EN 13501-1:2024. There is no release of toxic gases such as dioxins and hydrogen halides.

Application scenarios

Plastic and Electronic Electrical Field

-Application: PP/PE electrical casing, PA nylon connector, epoxy resin PCB substrate, new energy battery pack components

-Recommended formula: PP substrate 80%+flame retardant APP 15%+pentaerythritol (carbon source) 3%+melamine (gas source) 2%

-Advantages: 1.6mm thickness meets UL 94 V-0 level, stable dielectric performance (volume resistivity ≥ 10 ¹⁴Ω· cm), good processing fluidity, and has passed RoHS 2.0 and REACH full compliance certification.

Fireproof coatings and building materials field

-Application: Steel structure fireproof coating, wood flame retardant coating, gypsum board, flame retardant plywood

-Recommended formula: acrylic lotion 60%+flame retardant APP 12%+expanded graphite 8%+carbon forming agent 10%+auxiliary agent 10%

-Advantages: The expanded carbon layer is dense and tough, with a fire resistance limit of over 1.5 hours. It has excellent resistance to moisture and heat aging, meets the GB 8624-2012 B1 level flame retardant standard, and has no odor or yellowing.

Rubber and cable field

-Application: PE/EVA cable sheath, styrene butadiene rubber conveyor belt, automotive rubber seal

-Recommended formula: EVA base material 75%+flame retardant APP 20%+compatibilizer 3%+anti-aging agent 2%

-Advantages: Passed IEC 60332-3 bundle flame retardant test, oxygen index (LOI) ≥ 32%, elastic recovery rate ≥ 90%, weather resistance meets long-term outdoor use requirements.

Textile and other fields

-Application: Flame retardant cotton fabric, polyester fabric, dry powder fire extinguishing agent, agricultural slow-release fertilizer enhancer

-Recommended formula: Textile flame retardant finishing solution: APP 15%+urea 5%+adhesive 8%+water 72% (diluted 500 times by immersion rolling)

-Advantages: Textile flame retardant time<5 seconds, meeting the GB 50222-2017 standard; Fire extinguishing agents have high fire extinguishing efficiency and no secondary pollution; Phosphorus slow-release can be achieved in fertilizers to improve utilization efficiency.

If you are looking for flame retardant ammonium polyphosphate or specialized ammonium polyphosphate for fireproof coatings, Taixing will be your best partner and we will provide the lowest price cooperation!