Silicone Coated Ammonium Polyphosphate

Silicone Coated Ammonium Polyphosphate

    Specifications
    HS Code 430926
    Chemical Formula Typically (NH4)n+2PnO3n+1 with silicone coating
    Appearance White powder
    Particle Size Fine particles, usually in the micron range
    Melting Point High, around 250 - 280 °C
    Density Approx. 2.2 - 2.4 g/cm³
    Solubility In Water Low solubility
    Thermal Stability Good thermal stability up to high temperatures
    Flammability Low flammability, acts as a flame retardant
    Ph In Solution Near - neutral
    Chemical Stability Stable under normal conditions, resistant to hydrolysis to some extent

    As an accredited Silicone Coated Ammonium Polyphosphate factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing 25 - kg bags of Silicone Coated Ammonium Polyphosphate for chemical packaging.
    Storage Silicone coated ammonium polyphosphate should be stored in a cool, dry place. Keep it away from heat sources, open flames, and moisture to prevent degradation. Store in a well - sealed container to avoid contact with air and contaminants. This helps maintain its chemical properties and ensures safe and effective use.
    Shipping Silicone - coated ammonium polyphosphate is shipped in sealed, moisture - resistant containers. These are carefully packed to prevent damage during transit, ensuring the chemical's integrity for safe and proper use at the destination.
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    Silicone Coated Ammonium Polyphosphate Silicone Coated Ammonium Polyphosphate
    General Information
    Historical Development
    Alum and amine salts were recognized by the ancients, but the refractory properties of the elemental substance are limited. In modern times, their derivatives have gradually become more and more important in the chemical industry, especially ammonium polyphosphate (APP) as a new type of flame retardant material, which is respected by the world. However, the surface of APP is prone to moisture absorption and accumulation, and its use is limited. By the end of the 20th century, technicians created a method of organic silicone coating to make silicon-coated amino polyphosphate (Silicone Coated APP), which greatly improved its properties. This material has increased water resistance, good dispersion, compatibility with various polymer materials, and is particularly flame retardant. Since its invention, it has gradually replaced traditional flame retardants and is widely found in plastics, coatings and building materials. Under the silicon-coated flaps, this alum amine salt is moving towards multiple applications, efficient and environmentally friendly, and has become a leader in the field of flame retardancy.
    Product Overview
    Silicone-coated ammonium phosphate products are based on high-quality polymer ammonium phosphate, and are coated with organic silicone to form a film to increase its water resistance, anti-caking and dispersion effects. Its properties are white fine powder with uniform particle size and good fluidity. In case of high temperature fire, it can decompose and release inert gas to form a porous carbon layer, cut off the ignition source and suppress smoke. This material has good compatibility with various resins, and is especially suitable for epoxy, acrylic acid, polyolefin and other systems, and is widely used in plastics, fibers, coatings and adhesives. Compared with ordinary ammonium phosphate, its weather resistance and water resistance are greatly improved, and it can be used in flame retardant formulations, which can take into account environmental protection and performance requirements. Its preparation process is excellent, and the quality is stable, making it the best material selection among many flame retardants.
    Physical & Chemical Properties
    Silicone-coated ammonium polyphosphate is white in color and powder, light in weight and insoluble in water. When exposed to high temperature, it starts to decompose and release ammonia and polyphosphoric acid, and can withstand flame roasting without losing its nature. Its surface is coated with silicone, causing particles to disperse, greatly increasing moisture resistance, and chemical inertness. In case of acid and alkali, it is more stable than those without coating, and gradually cracking when heated to form polyphosphoric acid, which helps to condense the carbon layer and is used for flame retardant and benefit. Mild and odorless, compatible with organic and inorganic substances. Slightly soluble in some polar solvents, but not easy to dissolve in most systems. Uniform particle size, easy to process, high thermal stability, and delays the speed of thermal decomposition. Tried in practice, good weather resistance, not easy to agglomerate, is a high-performance flame retardant materials of the best.
    Technical Specifications & Labeling
    Ammonium alfate and silicone co-coated, is a flame retardant material. Its properties are white powder, no odor, uniform particle size, common D50 between 15 and 20 microns. Phosphorus content is about 31%, nitrogen content is not less than 14%, ignition point is more than 280 degrees Celsius. Low moisture absorption, no more than 0.25% at room temperature and humidity. Excellent water resistance, very few soluble in water, pH value in one percent aqueous solution is between 6.5 and 7.5. Thermal decomposition is stable, insoluble in case of fire, phosphorus release takes effect. Packaging is mostly lined with polyethylene bags, covered with kraft paper bags, net weight of 25 kg per bag. Clearly marked, indicate the product name, batch number, production date, content, storage must be dry, cool, dark and moisture-proof. Passed the inspection, conforms to the national standard GB standard, and should be widely used in plastics, coatings, building flame retardant and other applications.
    Preparation Method
    Silicone coated ammonium phosphate, take ammonium polyphosphate as the masterbatch, use silicone as the coating, use organic solvent as the medium, and control the temperature moderately. First, the ammonium polyphosphate is evenly placed in a mixer, and the diluted silicone solution is slowly added dropwise to make it adhere to the particle surface uniformly. Then the temperature is raised to promote the dissolution, so that the surface of the silicone and the ammonium phosphate is more tightly bound. The corresponding catalyst, such as an organic amine or a platinum-based complex, can initiate the condensation of the silicone, cross-linking and coating to form a film, which can increase its heat resistance and hydrophobicity. Finally, it is desolved by centrifugation and dried at low temperature to obtain the finished grain, which is round and dense, evenly coated, and has good migration resistance. Its effectiveness, with both physical barrier and chemical inertness, can be significantly improved when applied to flame retardancy.
    Chemical Reactions & Modifications
    Silica-coated ammonium phosphate products have an exquisite production method, which shows the principle of chemical reaction and modification. The original ammonium phosphate is mostly hydrophilic and easy to hydrolyze. Then it is coated with silanes to form a dense film layer through silanol condensation, forming an organic/inorganic composite interface. In this process, the silane hydroxyl groups and the hydroxyl groups on the surface of ammonium phosphate are condensed with each other, releasing water and solidifying, enhancing adhesion, and the film layer can shield moisture and inhibit migration and hydrolysis. The modified ammonium phosphate has water resistance, heat resistance and dispersion properties. It is applied to polymer substrates to improve flame retardancy without damaging the mechanical strength of the substrate. Chemical reactions and modifications make this product both stable and efficient, making it suitable for industrial use in a variety of materials. The so-called wonders are infinite, relying on scientific generation and reflecting the subtle changes in ancient and modern chemistry.
    Synonyms & Product Names
    Silicone-coated ammonium polyphosphate is a commonly used flame retardant in the chemical industry. It has many synonyms, or silicone-coated ammonium phosphate, or silicone-coated ammonium polyphosphate, all of which refer to similar substances. There are also trade names "APP-Si", "Silicone Coated APP", "SOAPP" and "SCAPP", which are circulated in the city. In fact, this product is also. Or marked with "silicon-modified ammonium polyphosphate", or simply "silicon-coated ammonium polyphosphate", and more names such as "Silicone Encapsulated Ammonium Polyphosphate" and "Silane Treated APP" in English are now on various invoices. Due to the slight difference in the formula or the independent trademark, it is difficult to separate the reality of silicone-coated ammonium polyphosphate. Purchasers should identify many aliases and check their components to avoid confusion.
    Safety & Operational Standards
    Silicone Coated Ammonium Polyphosphate is an essential product of flame retardant materials. Its properties are stable, but the work should not be careless. When storing in storage, be sure to seal the container, keep it away from humid and hot sun, and do not store it with acid and alkali. Store in a well-ventilated place, avoid sources of fire and heat. Operators should wear gloves, masks and goggles to prevent particles from entering the eyes and inhaling the airway. If it touches the skin by mistake, rinse it with water quickly; if it splashes into the eyes, it must be rinsed with running water and seek medical attention urgently. The dust is scattered, and use ventilation or exhaust equipment to prevent inhalation. Carry it slowly, do not make the bag break powder, and the leakage must be removed immediately, otherwise it will cause pollution if it accumulates for a long time. It is forbidden to eat and drink in the workplace, clean hands and face after work, and separate clothes from daily clothes. Packing with finish should not be discarded at will. Disposal should be in accordance with local norms, incinerated and landfilled to avoid damage. Silicon-coated polyphosphonium can be decomposed when it encounters a hot topic. It is safe at room temperature, but it is easy to cause failure due to mixing. Therefore, if it is used for compounding, it has the method of dilution and mixing gradually, and should not be used in a hurry. Master its temperament and take appropriate measures, so that you can enjoy its strengths peacefully. If you don't know what happens, you should wait for a special person to deal with it. If you don't know it, you should be responsible for filing and wait for a special person to deal with it. If you have a disease, you should stay away. It is
    Application Area
    Silicone coated with ammonium phosphate is also cherished in the chemical industry. Its flame retardant and heat-resistant, non-flammable in case of fire, can release phosphorus to form charcoal, and is widely used in a variety of materials. It can be seen in plastics, rubber, coatings, fiberboard, paper products, etc. With the help of the coating, it is compatible with polymers, with enhanced performance, not easy to absorb moisture, and adapts to changing environments. It is used in cables, home improvement, transportation, and building materials, and is indispensable for security. It can cooperate with other flame retardants and is used in industries with environmental protection and high standards. In the research and development of many new materials, it is also used as the main agent to help innovation. Therefore, in today's market, this product is widely used in the world due to its excellent flame retardant effect and harmless to the environment.
    Research & Development
    Silicone-coated ammonium polyphosphate is the most important of modern flame retardant materials. Its stability, flame retardant in case of fire, and in case of high temperature can release phosphorus acid, catalytic carbon, inhibit combustion, and benefit the protection of the substrate. Since the predecessors used ammonium polyphosphate as flame retardant, although it has good effects, it is easy to absorb moisture and disperse unevenly, so the performance is slightly inferior. Later generations of workers have used silicone as the coating, which not only enhances the hydrophobicity, but also maintains its mechanical properties, making it more evenly distributed in the polymer composite system. Scientists have explored many ways, or improved the coating process, or adjusted the ratio, and strive to combine cost and utility. It is widely used in plastics, rubber, and coatings. Recent developers have adopted high-efficiency catalysis and nano-scale processes to make their flame retardant effects increasingly sophisticated. Therefore, silicone-coated ammonium polyphosphate has gradually made outstanding contributions to environmental protection and safety.
    Toxicity Research
    Silicon-coated ammonium phosphate has stable chemical properties and is widely used in flame retardant materials. Modern scientists have studied its toxicity considering its application in various civilian and industrial products. Based on animal experiments, exposure to a certain dose of silicon-coated ammonium phosphate has low acute toxicity, and no obvious death or organ damage has been observed. No irritation in the percutaneous test, and no respiratory discomfort in the inhalation test. However, long-term high-dose exposure may cause mild cytopathies. In vitro cell experiments, there is no obvious toxicity after dilution, but high concentrations can slightly inhibit cell proliferation. Based on all the data, silicon-coated ammonium phosphate is a relatively safe new flame retardant for application. However, its bioaccumulation and environmental toxicological effects remain to be studied in future generations.
    Future Prospects
    Silicon-coated ammonium polyphosphate is one of the best new materials in modern times. It has excellent flame retardancy, water resistance and aging resistance. Today, with the rapid development of science and technology, environmental protection and safety are becoming more and more important, and the demand for silicon-coated ammonium polyphosphate is gradually emerging. Looking into the future, this material may be used in many fields such as polymer materials, wood and coatings due to advanced technology and more perfect performance. Among them, it is compatible with halogen-free environmentally friendly flame retardant systems and has better synergy effect. If it is combined with nanotechnology and surface modification to give it stronger physical and chemical properties, the boundaries of application will be broadened. In the long run, this material may become the world's leading green flame retardant material, making outstanding contributions in both human safety and sustainable development.
    Where to Buy Silicone Coated Ammonium Polyphosphate in China?
    As a trusted Silicone Coated Ammonium Polyphosphate manufacturer, we deliver: Factory-Direct Value: Competitive pricing with no middleman markups, tailored for bulk orders and project-scale requirements. Technical Excellence: Precision-engineered solutions backed by R&D expertise, from formulation to end-to-end delivery. Whether you need industrial-grade quantities or specialized customizations, our team ensures reliability at every stage—from initial specification to post-delivery support.
    Frequently Asked Questions

    As a leading Silicone Coated Ammonium Polyphosphate supplier, we deliver high-quality products across diverse grades to meet evolving needs, empowering global customers with safe, efficient, and compliant chemical solutions.

    What are the main application fields of Silicone Coated Ammonium Polyphosphate?
    Silicone-coated ammonium phosphate has stable chemical properties, water resistance and heat resistance, and is among the best flame retardant materials. The preparation method uses ammonium phosphate as the matrix and is coated with silicone to give it excellent flame retardant properties and environmental adaptability. This material is widely used in many fields, especially in polymer materials, fireproof coatings, plastics, rubber, wood and fibers.
    In polymer materials, silicone-coated ammonium phosphate is often used as a flame retardant for polyolefins, polyurethane and epoxy resins. It is not easy to decompose when heated, and an expansion layer is formed when exposed to fire, which effectively isolates oxygen and heat sources, making the material non-flammable and less smoke. It is widely used in wires, cables and electronic components. In the field of fire retardant coatings, due to its strong expansion and heat insulation effect, it can be applied to the surface of steel structures, tunnels, and wooden structures, which can greatly improve the fire resistance, and is especially important in construction projects and transportation facilities.
    In the plastics and rubber industry, silicone-coated ammonium phosphate is used as a halogen-free flame retardant, which is better than traditional halogen-containing flame retardants. With its low toxicity, low smoke, and environmental protection characteristics, it is suitable for children's toys, household appliances, and automotive parts. It is not only fire-resistant, but also environmentally friendly. Wood processing also often introduces this agent to improve the safety level of wood products, delay the burning speed, and is suitable for flame retardant treatment of furniture, floors, and cabins.
    In the field of fibers and non-woven fabrics, silicone-coated ammonium phosphate gives fabrics self-extinguishing properties, suitable for home textiles, curtains, aviation and transportation interiors. In addition, some composite materials and paper processing are also less helpful.
    Overall its application, silicone-coated ammonium phosphate has increasingly become the mainstream option of modern flame retardant materials due to its advantages of burn resistance, waterproof, environmental protection, and easy compatibility with substrates. Its functions are widely used in all walks of life, making great contributions to the world and the people.
    How does the water resistance of Silicone Coated Ammonium Polyphosphate improve compared with ordinary ammonium polyphosphate?
    Among alum and amine flame retardants, ammonium polyphosphate is known for its high efficiency, but its water resistance is always short by the process. Ordinary ammonium polyphosphate is easily soluble in water, and it will dissolve after long-term immersion, resulting in the loss of its flame retardant efficacy, and easy to cause system precipitation, migration and other disadvantages.
    If silicone is coated on the ammonium polyphosphate surface, the surface will form a dense inorganic-organic mixed film. Silicone is hydrophobic and moisture-resistant, which can effectively prevent the infiltration of water. The membrane relies on the silica chain skeleton to cause the surface layer to be dense, which not only blocks the invasion of water and gas, but also prevents the external dissolution of ammonium polyphosphate molecules. And the coating is compatible with the substrate, and the bonding is firm, without the risk of easy peeling. Due to silicone's excellent heat resistance and corrosion resistance, the coating process does not reduce the nature of the coating material, which in turn makes ammonium polyphosphate durable.
    The high hydrophobicity of silicone film is evident in many performance tests. By long-term immersion or warm steaming, its phosphorus release rate is much better than that of uncoated ones, and the turbidity is small and the precipitation is thin. Looking at the contact angle again, the integration of ordinary ones is small, and the water droplets are easy to creep and spread, while the coated ones form water droplets that roll and are difficult to soak, showing that the hydrophobicity is significant. The reason for this is that the silicone coating partially masks the hydrophilic group of ammonium polyphosphate, thereby shielding its action with external water molecules.
    Silicone coating technology can improve the dispersion of ammonium polyphosphate in composite systems such as resins. Because of its apparent energy reduction, polymerization in polymers does not repel each other, and there is no worry about water analysis, thus stabilizing and lasting, and improving the overall flame retardant effect.
    Overall, silicone coating ammonium polyphosphate is an excellent way to enhance its water resistance. It can not only relieve the phenomenon of dissolution and precipitation, but also improve the long-term service stability of composites. In this way, it is of great benefit for flame retardant occasions that require high moisture resistance and water resistance.
    How is the dispersion performance of Silicone Coated Ammonium Polyphosphate in resin system?
    Silicone-coated ammonium polyphosphate has unique properties, especially its dispersion performance in the resin system. The natural hydrophobicity of capped ammonium polyphosphate is poor, the particle size is fine, and it is easy to agglomerate and difficult to distribute uniformly in organic polymers when exposed. Now wrapped on the surface of silicone substances, the surface layer forms a hydrophobic film, and the appearance is smooth, which can greatly improve its affinity to organic phases. The wrapped particles repel each other in the resin matrix, and the mutual attraction between them is weakened, and it is no longer easy to condense into groups. Complex silicone has surface activity and can bind microscopically with a variety of resin molecules, making ammonium polyphosphate uniformly suspended and distributed more finely.
    In terms of its advantages and disadvantages, silicone-coated ammonium polyphosphate is more evenly dispersed than uncoated ones when the resin is mixed, the system has higher transparency, moderate viscosity, and is not easy to precipitate or settle after shearing. If it is matched with suitable shearing and stirring conditions, the dispersion is more perfect. However, when the addition ratio is too high, or the polarity of the resin is completely different, the coating is also difficult to make up for the lack of bulk dissolution, or there are still a few microparticles formed. However, generally speaking, these materials can be well dispersed when integrated into unsaturated polyester, epoxy, acrylate and other systems, providing ideal performance for refractory resins and related composites.
    Combined with its dispersion properties, silicone-coated ammonium polyphosphate in the resin system not only overcomes the disadvantages of agglomeration and sedimentation, but also promotes the uniformity of the system and enhances the overall properties of the material. Therefore, in the design of flame retardant formulations and high-performance composites, this material is often the first choice. Nowadays, the manufacturing process is becoming more and more sophisticated, and the coating particle size is controllable, which makes its dispersion advantage more significant. Therefore, the dispersion performance of silicone-coated ammonium polyphosphate in the resin system can be said to be excellent, which is very suitable for high-quality materials.
    How is the thermal stability of Silicone Coated Ammonium Polyphosphate?
    Silicone-coated ammonium polyphosphate has a significant improvement in thermal stability compared to uncoated ones. Ammonium polyphosphate is instinctively flame retardant, and is prone to moisture decomposition when encountering hot topics, releasing ammonia and phosphoric acid, which is not conducive to the structural integrity of the material and affects its effectiveness as a flame retardant. If silicone is coated, a dense protective film is formed on the outside to greatly reduce the erosion of moisture and heat. The coating layer can isolate ammonium polyphosphate from direct contact with the external environment, delay its decomposition rate, and maintain a stable structure in a high temperature environment. And silicone itself has good thermal stability and is not easy to decompose at high temperature, which can further improve the heat resistance of the overall material.
    Silicone-coated ammonium polyphosphate, according to thermogravimetric analysis, its decomposition temperature is higher than that of uncoated ones, the first-order weight loss interval is delayed, and the carbon residue rate is relatively increased. After coating, the cover can effectively prevent the volatile components in ammonium polyphosphate from escaping. During the pyrolysis process, the silicone coating layer can co-participate in the formation of the carbon layer, further block heat transfer, inhibit the dissipation of ammonium polyphosphate decomposition products, and help to improve the overall thermal stability of the material. And when applied in actual polymer matrices, the coated ammonium polyphosphate has better dispersion and is not easy to agglomerate, which also helps to improve the heat resistance and mechanical properties of the composite.
    Silicone-coated ammonium polyphosphate can significantly improve the heat and weather resistance of the material during long-term service due to the formation of an inert layer on the surface, which inhibits its hydrolysis and decomposition. It is widely used in flame retardant plastics, coatings and other fields. In order to obtain excellent thermal stability, the fineness of the coating process and the density of the coating layer also need to be strictly controlled. In summary, silicone-coated ammonium polyphosphate has better thermal stability than pure ammonium polyphosphate, making it the best choice for high-performance flame retardant materials.
    What are the storage and transportation requirements for Silicone Coated Ammonium Polyphosphate?
    Silicon coated ammonium polyphosphate, its properties are mainly powder, white color, stable performance, but sensitive to moisture and high temperature. Proper storage is the key to maintaining its quality. It should be placed in a cool and dry place, away from direct sunlight, to prevent moisture from infiltrating. The storage room should be well ventilated, not with volatile, flammable, strong acid and reducing substances in the same place. The appliance should be airtight, and the storage container should be double-layer plastic bag or sealed iron drum to ensure that it is tightly sealed to prevent agglomeration or quality loss due to moisture.
    Handle with care when handling, avoid falling, impact, and prevent packaging damage from escaping. Loading and unloading tools should be clean and free of oil stains, and it is strictly forbidden to coexist with items prone to static electricity to reduce fire hazards. During transportation, do not mix with food and feed to prevent them from being contaminated by impurities. Transport compartments should be kept dry, especially in rainy and snowy days, covered with waterproof tarpaulin to avoid water impregnation and damage. Transportation routes should be protected from high temperatures, fire sources, and exposure to sunlight and heat.
    Regular inspections are required during storage. If the package is damaged, it should be replaced as soon as possible. Protective equipment should be used for contact operation to prevent inhalation of dust and long-term contact with the skin. If it is accidentally leaked, it should be collected in time, cleaned with a damp cloth to suppress dust, and do not use a broom to raise dust. Waste must be properly handled, in accordance with environmental protection regulations, and cannot be discarded at In case of fire, use water, dry powder, foam to extinguish the fire, and do not use acidic media to put it out.
    In short, those who store and transport silicon-coated ammonium polyphosphate in Jiashan will be able to prolong its life and ensure its effectiveness. Such as moisture-proof, heat avoidance, remote fire, sealing, sub-storage, special transportation, and inspection are all necessary to maintain its products. Only by carefully guarding it can we keep it safe and use it for a long time.