Ammonium Polyphosphate Flame Retardant for Polypropylene
| HS Code | 140313 |
| Chemical Formula | Typically (NH4PO3)n |
| Appearance | White powder |
| Melting Point | Relatively high, usually above 250°C |
| Solubility | Insoluble in most organic solvents, slightly soluble in water |
| Thermal Stability | Good thermal stability, decomposes at high temperatures to release phosphoric acid derivatives which act as flame - retardant species |
| Phosphorus Content | High phosphorus content, usually around 25 - 32% |
| Nitrogen Content | Contains nitrogen, typically around 14 - 17% |
| Particle Size | Controllable, usually in the range of a few micrometers to tens of micrometers |
| Ph Value | Neutral or slightly acidic in aqueous suspension |
| Flame Retardant Mechanism | Char - formation, gas - phase dilution, and radical - trapping |
| Compatibility | Good compatibility with polypropylene |
| Hygroscopicity | Moderate hygroscopicity |
As an accredited Ammonium Polyphosphate Flame Retardant for Polypropylene factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 50 - kg bags of Ammonium Polyphosphate Flame Retardant for Polypropylene. |
| Storage | Ammonium Polyphosphate Flame Retardant for Polypropylene should be stored in a cool, dry place. Keep it away from direct sunlight, heat sources, and moisture to prevent caking or degradation. Store in a well - ventilated area, separated from incompatible substances like strong acids or bases. Use proper packaging to maintain its integrity during storage. |
| Shipping | Ammonium Polyphosphate Flame Retardant for Polypropylene is shipped in sealed, moisture - resistant bags or containers. It's transported via standard freight methods, ensuring protection from environmental factors during transit. |
Competitive Ammonium Polyphosphate Flame Retardant for Polypropylene prices that fit your budget—flexible terms and customized quotes for every order.
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Historical Development
Tracing back to the origin, the birth of polypropylene, the need to enable flame resistance, of course. At the beginning, bromine flame retardant was applied, but its smoke and dust were complicated, and the environment was harmful. By the middle of the twentieth century, scholars had been studying it, and halogen-free flame resistance was gradually introduced. Ammonium polyphosphate was first seen in the world, and the formula was improved, and the performance was improved day by day. It can be pyrolyzed into phosphoric acid, generate a carbon layer, isolate oxygen, and effectively solidify flame. Over the years, ammonium polyphosphate has been polymerized from the first stage to multi-stage copolymerization, and the structure has become increasingly delicate, and the particle size laws have changed. Today, it has been widely used in polypropylene, and synergistic agents are shared to improve the flame retardant level, reduce smoke toxicity, and benefit environmental protection. With the advance of science and technology, the function of ammonium polyphosphate flame retardants has increased
Product Overview
This product is called ammonium polyphosphate flame retardant for polypropylene. It is white in color, slightly soluble in water, and has stable properties. Its molecular structure is synthesized by ammonium polyphosphate through a special process, which can decompose into phosphoric acid and ammonia gas in a high temperature environment to form a foam carbon layer, which blocks oxygen, isolates heat sources, and effectively inhibits the combustion potential of polypropylene. This product has both thermal stability and high-efficiency flame retardant characteristics. It is widely used in various polypropylene products, such as electrical appliances, automobiles, building materials and other fields, and can improve the safety performance of products. Its halogen-free and low smoke, environmentally friendly, does not affect the physical properties of polypropylene, and can also be compatible with various additives. The product has uniform particle size and is easy to disperse and process. It has won praise in the industry and has become the choice of flame ret
Physical & Chemical Properties
This nitrogen and phosphorus flame retardant, chemically called ammonium polyphosphate, white and odorless, solid powder, uniform particle size. Stable properties, insoluble in cold water, slightly soluble in hot water, insoluble in ethanol and acetone. Decompose when heated, release ammonia and polyphosphoric acid, decomposition temperature is about 250 degrees Celsius. Its chemical properties are stable, and it reacts slowly in case of acid and alkali. Blended in polypropylene, it can be processed at high temperature and is not easy to decompose. Strong thermal stability, good moisture resistance, chemically inert, and does not spontaneously ignite in case of oxygen. The structure of polyphosphoric acid makes it capable of forming a carbon layer at high temperature, blocking the contact between the substrate and the air, and slowing down the spread of combustion. The molecule contains polyphosphoric acid groups, which endows superior flame retardant performance, and has the characteristics of halogen-free, low smoke, and non-toxic, making it suitable for flame retardant modification of polymer materials.
Technical Specifications & Labeling
This product is called ammonium polyphosphate flame retardant for polypropylene. It is like a white powder and slightly shiny. Its phosphorus content is about 31%, nitrogen content is nearly 14%, particle size is between 10 and 20 microns, water solubility is less than 0.5%, thermal decomposition temperature is higher than 280 degrees Celsius. The pH value is within 5 to 7, non-toxic and tasteless, and does not contain halogens. The specific gravity is about 1.9 grams per cubic centimeter, and the drying loss is less than 0.5%. This product can be highly dispersed in plastics and has good compatibility. The dosage in polypropylene materials can be adjusted according to the needs of the product. The common addition ratio is 20-30 parts per hundred parts of resin. 25 kg woven bags are commonly used for packaging. They should be stored in a cool and dry place to prevent moisture and agglomeration. Suitable for flame retardant needs in modified plastics and electronic appliances.
Preparation Method
Phosphoric acid and ammonia water are taken as raw materials, put into the reaction kettle, and slowly heated to a suitable temperature. After mixing the two, the temperature is gradually raised to about 180 degrees Celsius, so that the reaction produces ammonium phosphate. Continued by dehydration polymerization, ammonium phosphate is condensed at high temperature to form long-chain or branched ammonium polyphosphate. In the meantime, a little catalyst such as silicic acid can be added to promote the condensation rate and regulate the molecular weight distribution. Volatile by-products are eliminated with heat, and the resulting product is cooled, pulverized, and refined into a white powder flame retardant. Its catalytic mechanism is to help the dehydration reaction proceed smoothly with the help of catalysts that activate hydroxyl groups and phosphorus-oxygen bonds, and the polyphosphoric acid bonds are extended in an orderly manner. The final ammonium phosphate with high polymerization degree gives flame retardant properties to polypropylene and other polymer materials. It can decompose into polyphosphoric acid and release non-combustible gas in case of fire, isolating oxygen source and inhibiting flame spread, which has significant effect.
Chemical Reactions & Modifications
Polypropylene is light in nature, but flammable, and cannot be controlled by fire. If ammonium polyphosphate is used to help it, it can be modified by surface or blending to increase its flame retardancy. Ammonium polyphosphate releases phosphate in case of fire, which uses polypropylene to thermally crack and generate carbon, forming a carbon layer to block oxygen and heat sources, and inhibit the spread of fire. If it is blended with silicon, organic coating or synergistic agent, its dispersion and compatibility are better. In chemical reactions, ammonium polyphosphate interacts with polymer chain ends or additives to promote the compactness of the carbon layer and long-term flame resistance. Therefore, the delicate modification of ammonium polyphosphate can give polypropylene high flame retardant properties, which is used in many fields such as electronics and building materials. It is an essential technique of materials science.
Synonyms & Product Names
Polypropylene flame retardant material, mostly ammonium polyphosphate, is what scholars and craftsmen call "ammonium polyphosphate". This material replaces the old ammonium phosphate salt, and its flame retardant effect is outstanding. It is also known as APP in the world, or long-chain ammonium polyphosphate, flame retardant ammonium polyphosphate, and polyphosphate flame retardant. The name of the city is "APP-I", "APP-II", or the name of each factory, such as "Exolit AP 422", "Clariant AP422", and refers to the same name. Foreign merchants also have "Flame Retardant AP422" and "Ammonium Polyphosphate FR APP". Its appearance, white powder is more. No matter at home or abroad, the different names are synonymous, and they all take the effect of extended combustion and fire protection, and are used in polypropylene, plastic, paint, bonding and many other processes. I have studied it for a long time, and I know that although its name is complicated, it is also a solid.
Safety & Operational Standards
Ammonium aminopolyphosphate, for the flame retardant use of polypropylene, its properties are white granular, soluble in water, and are often used in many industrial fields. Those who use this product should be aware of its properties and abide by safety orders. Storage must be cool and ventilated, and it is forbidden to coexist with flammable, explosive and strong oxidants. When handling, when light loading, do not let dust fly, avoid mechanical friction and strong impact, to prevent accidents. Workplaces must have good ventilation to avoid inhalation of dust. Workers wear protective hats, dust masks and gloves. When the object comes into contact with the skin or eyes, rinse with flowing water. If there is an inhaler, move to fresh air, the symptoms are aggravated, and seek medical treatment.
Avoid fireworks in the operation room, and keep away from open flame heat sources. Natural gas and electrical appliances should not be close to their warehouses, so as to prevent accidents. Tank storage must be sealed, moisture-proof and rain-proof. Use it when opened, and this bag should be sealed. Do not expose it for a long time. Discarded packaging should be handled according to specifications to prevent damage to the environment. In case of fire, it is advisable to use mist water, foam, and carbon dioxide fire extinguishers to save it, and keep it away from the downwind to prevent toxic fumes from invading. After application, clean your hands and face, do not take contaminated clothes home, and ensure peace in your home.
All users of ammonium aminophosphate must be trained and understand the operation guidelines. Managers regularly inspect the storage premises to check that there is no leakage and no ash accumulation. Equipment has been overhauled over the years, and pipelines must not have rusted pores The operation log is detailed and there is evidence for entry and exit. In case of abnormality, report to the supervisor immediately to find out the cause and prevent the problem before it occurs. This product is used for polypropylene modification to make the product self-extinguishing and flame retardant. Although it increases safety, the operation should not be slack. Always think carefully, from beginning to end, to achieve safety and safety.
Avoid fireworks in the operation room, and keep away from open flame heat sources. Natural gas and electrical appliances should not be close to their warehouses, so as to prevent accidents. Tank storage must be sealed, moisture-proof and rain-proof. Use it when opened, and this bag should be sealed. Do not expose it for a long time. Discarded packaging should be handled according to specifications to prevent damage to the environment. In case of fire, it is advisable to use mist water, foam, and carbon dioxide fire extinguishers to save it, and keep it away from the downwind to prevent toxic fumes from invading. After application, clean your hands and face, do not take contaminated clothes home, and ensure peace in your home.
All users of ammonium aminophosphate must be trained and understand the operation guidelines. Managers regularly inspect the storage premises to check that there is no leakage and no ash accumulation. Equipment has been overhauled over the years, and pipelines must not have rusted pores The operation log is detailed and there is evidence for entry and exit. In case of abnormality, report to the supervisor immediately to find out the cause and prevent the problem before it occurs. This product is used for polypropylene modification to make the product self-extinguishing and flame retardant. Although it increases safety, the operation should not be slack. Always think carefully, from beginning to end, to achieve safety and safety.
Application Area
Ammonium phosphate polymer flame retardant is specially used for the safety improvement of polypropylene materials. It is insoluble in water and has excellent thermal stability. It can release phosphoric acid in case of fire, promote the formation of carbon layer, and effectively isolate oxygen and heat sources. Therefore, it is suitable for the shell of electronic devices to prevent fires caused by short circuits; it is also suitable for the construction industry to make refractory sheets, pipes, decorative parts, etc., to enhance their fire resistance. Interior and door panels used in the automotive industry take their flame retardant effect to ensure the safety of occupants. In the packaging field, polypropylene containing this flame retardant is also selected for containers and trays that need fire resistance and burn resistance. In addition, the textile field needs to give the fabric flame retardancy, and it can also be mixed into the fiber to make the finished product both flexible and safe. All kinds of industrial applications rely on its high efficiency and long-term performance, which makes it widely respected in modern industry.
Research & Development
Among nitrogen and phosphorus compounds, ammonium polyphosphate is a good material for flame retardancy. Polypropylene is widely used in today's world, but it is flammable, and it will be a disaster in case of fire, so it needs to be improved urgently. Scholars have devoted themselves to their research. Ammonium polyphosphate is used as a flame retardant, and it is put into polypropylene. After high temperature reaction, it can be coated and formed, so that its decomposition rate is delayed, charcoal production is isolated, flames are not easy to spread, and smoke is less harmful. The ratio of tried materials, the conditions of reaction, and the interface between intimacy and remoteness have all been considered and analyzed. Today, all methods have been refined, which can not only ensure the mechanical properties of raw materials, but also effectively inhibit the spread of flames, and pay equal attention to industrial production and safety protection. The use of utensils is perfect, and there are many products,
Toxicity Research
Polypropylene is widely used for its excellent properties, but its flammable disadvantages are a concern for every user. In modern times, some scholars have used ammonium polyphosphate as a flame retardant and added it to polypropylene in order to improve its flame retardancy. However, the safety of the chemical cannot be ignored, and the toxicity study of this product is also very critical. After experiments, ammonium polyphosphate ingestion, the acute toxicity to rodents is low, no obvious lethal reaction is seen, and the semi-lethal dose is high, which belongs to the category of low toxicity. No significant damage to the organs was observed after long-term exposure, but a weak irritating effect was seen at high doses. After contact with the skin and eyes, most of them only saw slight irritation reactions, and no major allergic reactions or genetic toxicity were reported. Therefore, ammonium polyphosphate, as a flame retardant for polypropylene, is used within a reasonable range, and its toxicity risk is low. However, it is still advisable to strengthen protection in industrial practical applications, so as not to worry.
Future Prospects
Ammonium polyphosphate flame retardants have shown good results in polypropylene, but with the advancement of science and technology, industrial demand is growing. Looking at its future, it will definitely tend to green environmental protection, improve the process, reduce the amount of addition to achieve high-efficiency flame retardancy, and strive to be more compatible with polypropylene, so that the material properties are more perfect. Or introduce new nanomaterials, show the synergy effect, improve thermal stability and mechanics. It will also conform to the general trend of sustainable development, explore bio-based phosphorus sources, and relieve resource pressure. Intelligent flame retardant may be realized, adaptive environment adjustment of flame retardant behavior to cope with changing fire risk scenarios. Future application prospects are broad, whether in transportation, construction or electronics, it is expected to show its broader value.
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What is the main function of Ammonium Polyphosphate Flame Retardant for Polypropylene?
Ammonium aminopolyphosphate is a phosphorus-based flame retardant synthesized by humans today. It is a commonly used auxiliary agent in polypropylene. Its physical and chemical properties are stable, heat resistance is outstanding, water solubility is low, and it is easy to disperse in the resin body. Since it is applied to polypropylene materials, it can significantly improve the flame retardant properties of products, and is widely respected by the materials science community. Looking at its function, at the beginning of a fire, polypropylene is heated, and ammonium aminopolyphosphate precipitates phosphate and amino groups, decomposing to produce a variety of gases. This gas can isolate air and slow down the spread of combustion.
And the phosphate ion acts as a product of decomposition of polypropylene, promoting the formation of a carbon layer. The formation of the carbon layer acts as a barrier, which can block the infiltration of oxygen and heat transfer, thus inhibiting the continuation of the combustion In this way, the polypropylene compound can be prevented from rapidly spreading and burning in the high temperature flame. And ammonium aminopolyphosphate itself is halogen-free, and does not produce toxic fumes when burning. Compared with halogen flame retardants, it has little harm to the environment and human body, which shows its superiority.
In addition, ammonium aminopolyphosphate has good compatibility with polypropylene, and has little impact on the properties of the product after blending, maintaining its original mechanical properties. If it is compatible with other flame retardant additives, such as expanded carbon sources and carbon promoters, it can significantly enhance the flame retardant effect. It is applied to electronic and electrical components, automotive interiors, and building materials, and has a wide range of uses. Its addition amount depends on demand, generally between 2% and 5% to meet the flame retardant standard.
Overall, the main role of ammonium aminopolyphosphate in polypropylene is to improve its flame retardancy, delay flame propagation, reduce soot and toxic gas emissions, and maintain personal and property safety. The mechanism is physical isolation and chemical carbon promotion. The method is simple and the effect is remarkable. Scientific selection and reasonable compatibility can greatly improve the safety performance of polypropylene materials and meet the urgent demand for high-performance flame retardant materials in modern society.
And the phosphate ion acts as a product of decomposition of polypropylene, promoting the formation of a carbon layer. The formation of the carbon layer acts as a barrier, which can block the infiltration of oxygen and heat transfer, thus inhibiting the continuation of the combustion In this way, the polypropylene compound can be prevented from rapidly spreading and burning in the high temperature flame. And ammonium aminopolyphosphate itself is halogen-free, and does not produce toxic fumes when burning. Compared with halogen flame retardants, it has little harm to the environment and human body, which shows its superiority.
In addition, ammonium aminopolyphosphate has good compatibility with polypropylene, and has little impact on the properties of the product after blending, maintaining its original mechanical properties. If it is compatible with other flame retardant additives, such as expanded carbon sources and carbon promoters, it can significantly enhance the flame retardant effect. It is applied to electronic and electrical components, automotive interiors, and building materials, and has a wide range of uses. Its addition amount depends on demand, generally between 2% and 5% to meet the flame retardant standard.
Overall, the main role of ammonium aminopolyphosphate in polypropylene is to improve its flame retardancy, delay flame propagation, reduce soot and toxic gas emissions, and maintain personal and property safety. The mechanism is physical isolation and chemical carbon promotion. The method is simple and the effect is remarkable. Scientific selection and reasonable compatibility can greatly improve the safety performance of polypropylene materials and meet the urgent demand for high-performance flame retardant materials in modern society.
How does Ammonium Polyphosphate Flame Retardant for Polypropylene affect the physical properties of polypropylene?
Ammonium salt polyphosphoric acid is a good bait for refractory materials made today. It is mixed in polypropylene to inhibit combustion. When mixed in polypropylene, it has many effects on its physical properties. First, because it is dispersed between the polymer matrix, the mechanical properties of the material change. If the distribution is uniform and the particles are fine, the bending modulus and tensile strength may be slightly improved; if the particle size is too large and the dispersion is uneven, the elongation at break will decrease, the brittleness will gradually develop, and the impact resistance will weaken.
In addition, the addition of ammonium salt polyphosphoric acid may hinder the formation of polypropylene crystal morphology. It is an inorganic salt, which is stagnant in the microscopic gap of the matrix, blocking the uniform stacking of molecular chains, and reducing the crystallinity. When the crystallinity is reduced, the transparency is also affected, the material is turbid, and the surface is slightly rough. Melt fluidity also changes accordingly, and the flow rate can be slightly slowed down, which affects the subsequent molding process.
Furthermore, the thermal stability of polypropylene is also affected by this. Ammonium salt polyphosphoric acid can catalyze the degradation of polypropylene, causing its molecular chain fracture temperature to drop slightly, and its heat resistance is lower than that of pure bodies. However, it mainly forms a carbon layer, isolates oxygen, and can greatly inhibit the formation of harmful gases and flammable volatiles.
As for surface characteristics, due to the fact that ammonium salt polyphosphoric acid has many hydrophilic groups, polypropylene is hydrophobic in nature. After mixing, the surface energy increases, and the moisture absorption is stronger than in the past. If it is not stored properly, it will absorb water and expand, and the mechanical properties
In short, the addition of ammonium salt polyphosphoric acid makes polypropylene into a carbon shield, which is difficult to burn and safe; however, it has more or less effects on mechanics, thermal properties, optics and moisture absorption. In order to combine material mechanics and flame retardancy, fine selection of particle size, ratio and dispersion technology can be combined and made into a good material.
In addition, the addition of ammonium salt polyphosphoric acid may hinder the formation of polypropylene crystal morphology. It is an inorganic salt, which is stagnant in the microscopic gap of the matrix, blocking the uniform stacking of molecular chains, and reducing the crystallinity. When the crystallinity is reduced, the transparency is also affected, the material is turbid, and the surface is slightly rough. Melt fluidity also changes accordingly, and the flow rate can be slightly slowed down, which affects the subsequent molding process.
Furthermore, the thermal stability of polypropylene is also affected by this. Ammonium salt polyphosphoric acid can catalyze the degradation of polypropylene, causing its molecular chain fracture temperature to drop slightly, and its heat resistance is lower than that of pure bodies. However, it mainly forms a carbon layer, isolates oxygen, and can greatly inhibit the formation of harmful gases and flammable volatiles.
As for surface characteristics, due to the fact that ammonium salt polyphosphoric acid has many hydrophilic groups, polypropylene is hydrophobic in nature. After mixing, the surface energy increases, and the moisture absorption is stronger than in the past. If it is not stored properly, it will absorb water and expand, and the mechanical properties
In short, the addition of ammonium salt polyphosphoric acid makes polypropylene into a carbon shield, which is difficult to burn and safe; however, it has more or less effects on mechanics, thermal properties, optics and moisture absorption. In order to combine material mechanics and flame retardancy, fine selection of particle size, ratio and dispersion technology can be combined and made into a good material.
Ammonium Polyphosphate Flame Retardant for Polypropylene What is the proportion of addition?
In the field of chemical industry, it is a common process to use polypropylene as the main body and add flame retardants to increase its fire resistance. Among phosphorus-based flame retardants, ammonium polyphosphate is especially important for people because of its good thermal stability, non-toxic gas, and expansion. Although its usage varies, the approximate addition ratio is mostly 20% to 30% (wt%) in the industry.
If the addition ratio is too small, the flame retardant effect is not obvious. In case of an open flame, the droplet is especially serious, and it is often easy to spread. On the contrary, if the proportion is too high, although it can inhibit combustion, the mechanical properties of the material such as stretching and impact will be significantly weakened, and the product is easy to crisp but not strong, which also affects the appearance and process parameters of the product. However, the dosage must be determined according to the requirements of the flame retardant grade. If it is required to reach UL 94 V-2, more than 20 points can be used. If the picture is higher, such as V-0, or the LOI value is greater than 26 or 30, it is appropriate. Such as adding additives such as antimony trioxide, talc powder, etc. can also be adjusted accordingly as needed.
Those who use ammonium polyphosphate also need to pay attention to its degree of polymerization and decomposition temperature. Those with a high degree of polymerization also have a high decomposition temperature. Polypropylene suitable for high temperature processing has little water solubility and does not precipitate. With appropriate compatible agents such as ethylene-vinyl acetate copolymer, the dispersion uniformity can be further improved. As for the process, ammonium polyphosphate should be mixed with polypropylene and its ingredients first, granulated by a twin-screw extruder, to obtain a homogeneous material. Then, depending on the product, injection molding, blow molding, or other processing methods are required.
In short, the proportion of ammonium polyphosphate flame retardant added to polypropylene is generally 20 to 30% of the total weight. The specific dosage needs to be comprehensively weighed in combination with the target flame retardant grade, product performance and matching additives, in order to achieve both performance and safety. Discipline yourself in work, measure materials and use them to obtain the best results.
If the addition ratio is too small, the flame retardant effect is not obvious. In case of an open flame, the droplet is especially serious, and it is often easy to spread. On the contrary, if the proportion is too high, although it can inhibit combustion, the mechanical properties of the material such as stretching and impact will be significantly weakened, and the product is easy to crisp but not strong, which also affects the appearance and process parameters of the product. However, the dosage must be determined according to the requirements of the flame retardant grade. If it is required to reach UL 94 V-2, more than 20 points can be used. If the picture is higher, such as V-0, or the LOI value is greater than 26 or 30, it is appropriate. Such as adding additives such as antimony trioxide, talc powder, etc. can also be adjusted accordingly as needed.
Those who use ammonium polyphosphate also need to pay attention to its degree of polymerization and decomposition temperature. Those with a high degree of polymerization also have a high decomposition temperature. Polypropylene suitable for high temperature processing has little water solubility and does not precipitate. With appropriate compatible agents such as ethylene-vinyl acetate copolymer, the dispersion uniformity can be further improved. As for the process, ammonium polyphosphate should be mixed with polypropylene and its ingredients first, granulated by a twin-screw extruder, to obtain a homogeneous material. Then, depending on the product, injection molding, blow molding, or other processing methods are required.
In short, the proportion of ammonium polyphosphate flame retardant added to polypropylene is generally 20 to 30% of the total weight. The specific dosage needs to be comprehensively weighed in combination with the target flame retardant grade, product performance and matching additives, in order to achieve both performance and safety. Discipline yourself in work, measure materials and use them to obtain the best results.
Ammonium Polyphosphate Flame Retardant for Polypropylene Is it easy to decompose or fail during use?
According to the books in "Chemistry", polypropylene is a thermoplastic polymer with flammable properties, so flame retardants need to be added to prevent incineration. For multi-purpose nitrogen and phosphorus additives, ammonium polyphosphate (APP) is the best choice. APP is essentially a polymer ammonium phosphate salt with relatively stable chemical properties. However, there are also some details about its decomposition and failure during use.
APP at room temperature has firm properties and is not easy to decompose. It is placed in polypropylene, mixed, and heated to a processing temperature (180 to 250 degrees Celsius), especially its thermal stability. Scholars' tests have shown that the decomposition temperature of APP is about 280 degrees Celsius, which is below the temperature of the polypropylene molding process, and basically does not decompose due to heat. If the APP used is of poor quality, has a lot of impurities, or has too large particle size, it will be unevenly dispersed, pore residue, chemical activity may occur, and cause micro-decomposition, which will affect the flame retardant benefits in the long run.
In addition, APP combines phosphate and ammonium roots, and releases NH and polyphosphoric acid at high temperature. To obtain fire and burn, the decomposition and release gas can be used on the surface of the film material to block the entry of oxygen and enhance the flame retardant effect. This is its mechanism. It is not invalid, but effective. Its flame retardant effect requires a sufficient carbon layer on the surface of polypropylene. If the amount of addition is insufficient, the distribution is uneven, or the processing temperature is controlled, it is difficult to exert its phosphorus release and carbon-causing effect. Exposed to humid, acid-base environments, or strong ultraviolet light for a long time, APP is slightly at risk of hydrolysis, resulting in loose structure and slightly reduced flame retardant properties. When it is a special working condition, it is unusual.
In short, APP is used for flame retardancy of polypropylene, and its performance is stable under normal conditions, decomposition is slow, and it is difficult to fail. Weitoujia uses high-purity products with proper temperature control to avoid moisture and strong acid-base environments, so its flame retardant effect can be maintained for a long time. For chemical products, it is especially important to maintain the above conditions and should not be taken lightly.
APP at room temperature has firm properties and is not easy to decompose. It is placed in polypropylene, mixed, and heated to a processing temperature (180 to 250 degrees Celsius), especially its thermal stability. Scholars' tests have shown that the decomposition temperature of APP is about 280 degrees Celsius, which is below the temperature of the polypropylene molding process, and basically does not decompose due to heat. If the APP used is of poor quality, has a lot of impurities, or has too large particle size, it will be unevenly dispersed, pore residue, chemical activity may occur, and cause micro-decomposition, which will affect the flame retardant benefits in the long run.
In addition, APP combines phosphate and ammonium roots, and releases NH and polyphosphoric acid at high temperature. To obtain fire and burn, the decomposition and release gas can be used on the surface of the film material to block the entry of oxygen and enhance the flame retardant effect. This is its mechanism. It is not invalid, but effective. Its flame retardant effect requires a sufficient carbon layer on the surface of polypropylene. If the amount of addition is insufficient, the distribution is uneven, or the processing temperature is controlled, it is difficult to exert its phosphorus release and carbon-causing effect. Exposed to humid, acid-base environments, or strong ultraviolet light for a long time, APP is slightly at risk of hydrolysis, resulting in loose structure and slightly reduced flame retardant properties. When it is a special working condition, it is unusual.
In short, APP is used for flame retardancy of polypropylene, and its performance is stable under normal conditions, decomposition is slow, and it is difficult to fail. Weitoujia uses high-purity products with proper temperature control to avoid moisture and strong acid-base environments, so its flame retardant effect can be maintained for a long time. For chemical products, it is especially important to maintain the above conditions and should not be taken lightly.
What is the impact of Ammonium Polyphosphate Flame Retardant for Polypropylene on the safety and environmental protection of polypropylene products?
Ammonium aminopolyphosphate is flame retardant and is widely used in polypropylene products. However, the safety and environmental protection of polypropylene should be distinguished and detailed. Ammonium aminopolyphosphate releases phosphoric acid in case of fire, promotes carbonization, isolates oxygen, blocks the chain of combustion, and makes it difficult for the fire to spread. Therefore, it is widely respected in the manufacture of flame retardant appliances. However, after it is mixed into polypropylene, it is stable in nature under normal conditions, does not volatilize harmful gases, and is not easily toxic. Therefore, during the use and storage period, it has little damage to the human body and is safe.
Again, in terms of its good and evil to the environment, its biochemical fate must be clarified. After incineration or disposal, ammonium aminopolyphosphate releases sulfur and phosphorus, which do not produce highly toxic substances such as dioxin or polycyclic aromatic hydrocarbons. It mostly swims in the form of phosphates. It can be used by vegetation in nature and is not easy to accumulate and cause harm. Its toxicity is far lower than that of halogen flame retardants, and it will not cause lasting pollution. However, its preparation requires resources such as ammonia and phosphate rock. If it is used excessively, there will be concerns about resource depletion and waste. If it is not handled properly, it is easy to cause eutrophication, pollute water bodies, and affect ecological balance.
In addition, ammonium aminopolyphosphate is a non-persistent organic pollutant with low bioconcentration. It is harmless if it is landfilled or incinerated in a standardized manner. However, when recycling polypropylene, the addition of flame retardants may slightly reduce the physical properties, and the recycling process needs to be improved to maintain the properties of the raw materials.
In summary, ammonium aminopolyphosphate is used in polypropylene products to improve flame retardancy, which has the advantages of high efficiency, low toxicity and low pollution, and has positive significance for protecting people and the sky. However, it is still equivalent to use a certain amount, standardize management, and carefully weigh its advantages and disadvantages throughout the cycle. Therefore, it is advisable in the way of safety and environmental protection, but it should not be unrestrained and ignore the ecological trend.
Again, in terms of its good and evil to the environment, its biochemical fate must be clarified. After incineration or disposal, ammonium aminopolyphosphate releases sulfur and phosphorus, which do not produce highly toxic substances such as dioxin or polycyclic aromatic hydrocarbons. It mostly swims in the form of phosphates. It can be used by vegetation in nature and is not easy to accumulate and cause harm. Its toxicity is far lower than that of halogen flame retardants, and it will not cause lasting pollution. However, its preparation requires resources such as ammonia and phosphate rock. If it is used excessively, there will be concerns about resource depletion and waste. If it is not handled properly, it is easy to cause eutrophication, pollute water bodies, and affect ecological balance.
In addition, ammonium aminopolyphosphate is a non-persistent organic pollutant with low bioconcentration. It is harmless if it is landfilled or incinerated in a standardized manner. However, when recycling polypropylene, the addition of flame retardants may slightly reduce the physical properties, and the recycling process needs to be improved to maintain the properties of the raw materials.
In summary, ammonium aminopolyphosphate is used in polypropylene products to improve flame retardancy, which has the advantages of high efficiency, low toxicity and low pollution, and has positive significance for protecting people and the sky. However, it is still equivalent to use a certain amount, standardize management, and carefully weigh its advantages and disadvantages throughout the cycle. Therefore, it is advisable in the way of safety and environmental protection, but it should not be unrestrained and ignore the ecological trend.
