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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.