Coated Red Phosphorus
| HS Code | 822506 |
| Appearance | usually red powder |
| Particle Size | varies, can be fine - grained |
| Chemical Formula | P (after coating modification) |
| Coating Material | usually an organic or inorganic compound for surface modification |
| Flammability | relatively lower compared to uncoated red phosphorus |
| Thermal Stability | improved compared to uncoated red phosphorus |
| Oxidation Resistance | enhanced due to coating |
| Electrical Conductivity | usually non - conductive |
| Density | dependent on coating and particle characteristics |
| Solubility | insoluble in most common solvents |
| Reactivity | less reactive than uncoated red phosphorus in some environments |
As an accredited Coated Red Phosphorus factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 5 - kg bag of Coated Red Phosphorus, securely packaged for safe transport. |
| Storage | Coated red phosphorus should be stored in a cool, dry, well - ventilated area, away from heat sources and open flames. It should be kept in tightly - sealed containers to prevent contact with air and moisture, which could lead to oxidation or other chemical reactions. Store it separately from oxidizing agents and combustible materials to avoid potential hazards. |
| Shipping | Coated Red Phosphorus is shipped in sealed, corrosion - resistant containers to prevent moisture and oxygen exposure. Transport follows strict chemical safety regulations, ensuring secure handling during transit to avoid any potential hazards. |
Competitive Coated Red Phosphorus prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please call us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Historical Development
The origin of red phosphorus coating can be traced back to the 19th century. Western French chemists first discovered that phosphorus is severe, red phosphorus is more stable than white phosphorus, but it is easily disturbed by moisture and oxygen, and its application is limited. Later scholars painstakingly considered and pioneered the method of coating, using resin and polymer materials to protect the outside, so as to isolate the air and reduce the hidden danger of combustion and explosion. After the Republic of China, industrial technology gradually used amino resin and epoxy coating in the coating process. The finished product was widely circulated and the safety performance was greatly improved. In the 21st century, nanotechnology was introduced, the coating was more uniform, and micro-regulation promoted it to shine in the fields of batteries, flame retardants, etc. Nowadays, with the development of preparation standards, red phosphorus coatings have become an important player in the field of new materials, promoting innovation in a wide range of industries.
Product Overview
Coated red phosphorus is also a new material of modern fine chemical industry. It is based on high-purity red phosphorus and coated with a special flame retardant coating to stabilize its properties, isolate contact with air and moisture, and inhibit the risk of spontaneous combustion. Uniform appearance, moderate particle size, easy to disperse in a variety of polymer materials. Widely used in electronic appliances, transportation, building materials and other fields to enhance its flame retardant performance. Compared with uncovered red phosphorus, the safety is greatly improved, and the storage and transportation have no worries about corrosion and toxicity. It can also effectively reduce the release of thermally released phosphorus, which is suitable for automated production line operations. The need for it is becoming increasingly apparent, and it is an important new additive in the chemical, materials, electronics industries and other industries.
Physical & Chemical Properties
Coated with red phosphorus, coated with polymer or inorganic materials, in the form of fine particles, bright red in color and dull in concealment. Its nature is firm and brittle, insoluble in water and various organic solvents, weak in smell, stable at room temperature, and does not spontaneously ignite. When heated to 300 degrees Celsius, it looks like sublimation is converted into phosphorus vapor. The outer coating film can prevent moisture and oxidation, effectively isolate air and moisture, so it is resistant to storage and avoids spontaneous combustion. Its spontaneous ignition point is higher than 700 degrees, much higher than that of yellow phosphorus. Its chemical properties are milder than yellow phosphorus, and it is not easy to react violently with oxygen. However, it can react with oxidants and halogens after being highly heated. Due to the cladding layer, it is not eroded by ordinary acids and bases, and is used for flame retardancy. It also decomposes and releases phosphoric acid, which helps to carbonize combustibles and isolate oxygen, making it difficult for fires to spread.
Technical Specifications & Labeling
This phosphorus is coated with red, like a fine powder, with a bright color. The pseudonym is Coated Red Phosphorus, so it is refined by film coating process, stable in nature, and difficult to spontaneously ignite. Its purity is as high as 95%, and the moisture content does not exceed 1%. The particle size is fine, uniform about 50 microns, dry without agglomeration. The density is about 2.2 grams per cubic centimeter, and the ignition point is 300 degrees. The packaging is tight, and more than 25 kilograms of iron drums are used to isolate the air, prevent moisture and avoid flames. The identification is detailed, and the item number, batch, origin and production date are complete, which is easy to identify and trace. It is suitable for flame retardant, matches and fireworks, etc. The transportation and storage must be protected from sunlight and high temperature. It must be handled according to the specifications of dangerous goods, and cannot be stored with oxidants.
Preparation Method
Using phosphate rock as raw material, first through high temperature stone refining, phosphorus vapor is precipitated and condensed into red phosphorus. Pure red phosphorus is selected, supplemented by surface treatment agent, an appropriate amount of resin and coating agent is taken, and red phosphorus is evenly mixed. Move into the reactor, control the temperature and humidity, slowly heat up, so that the coating agent melts and flows, evenly wrapping the red phosphorus particles. At this time, the coating layer is firmly bonded, effectively blocking the direct contact of red phosphorus with oxygen and moisture, preventing its spontaneous combustion and deliquescence. If the catalytic method is applied, trace metal ions or oxidants are often used to enhance the cross-linking between the molecules of the coating agent through its catalytic action, thereby improving the stability and durability of the red phosphorus coating layer. After cooling, sieving, and drying, the coated red phosphorus product is obtained. Coated with red phosphorus, it has stable properties and is widely used in flame retardant and other fields.
Chemical Reactions & Modifications
For those who coat red phosphorus, take fine phosphorus powder, use polymer or silicon-based organic matter as a film, and coat its surface, so that the nature of red phosphorus can be stopped. Red phosphorus is an active element, and it is easy to spontaneously burn and burn in case of high temperature or strong oxygen. It is toxic and difficult to use. Today, by means of modification, a coating is applied first to isolate oxygen and water, inhibit its surface reaction, and its stability is greatly increased. The coating can be copolymerized with chitosan, melamine, etc., or heat-resistant resins and silane coupling agents can be used to improve dispersion and synergistic flame retardant efficiency. Through this chemical reaction, the newly prepared red phosphorus particles not only ensure their flame retardant mechanism, but also reduce safety hazards, and can also be harmoniously compatible with various polymer materials. Due to its ease of processing, it is widely respected in plastics, rubber, and other fields.
Synonyms & Product Names
Coated red phosphorus, also known as coated red phosphorus, is circulated in the commodity market and has many aliases. Or coated red phosphorus, or coated red phosphorus. Its English name is more common in Coated Red Phosphorus, and it also has Encapsulated Red Phosphorus, Microencapsulated Red Phosphorus and other names. Commercially sold products have different trade names. If Clariant Exolit RP series, Yantai Chenchang CCP series, Italmatch Phoslite, etc., they are all compared by quality and use. It is often used in flame retardant industries, with more stable performance than conventional red phosphorus, surface coating, moisture resistance and oxygen resistance. Different sizes, different business names, but the essence is the same. It is actually a good product for industrial fire protection. It is also known as the science and technology market trade, and it is especially named by the coating materials and processes used. Its similar products, or named "modified red phosphorus" and "compound red phosphorus", are really different from the original red phosphorus.
Safety & Operational Standards
Red phosphorus, which is used in refining coatings, is a commonly used essential product in the chemical industry. However, it is dry and prone to change, so it is especially necessary to strictly abide by the specifications when operating. Its storage should be in a cool and dry place, away from the high temperature of open flames, and should not be co-located with oxidants and acids to avoid chemical reactions. Containers should be made of airtight and inert materials, which are moisture-proof and leak-proof, and each opening and closing should be light, and should not be strong to prevent leakage from damage devices. When handling, the action should be slow to prevent shock and extrusion; utensils and utensils should be free of oil stains and water stains, and should not be directly touched by metal utensils. The operating place must be fully ventilated, otherwise there is a risk of explosion when the powder accumulates in case of fire. The staff on duty should wear protective clothing, goggles, gloves, and masks, and the exposed parts of the body should not be contaminated with impurities. Every strike must clean clothes, wash hands, and beware of bringing out contaminants. Its waste residues should be stored in a centralized manner according to regulations, and should not be thrown at will. They should be handled properly by professional disposal. In case of leakage, quickly collect them with non-sparking equipment and discard them in designated containers. In case of ignition, water should not be used. It should be extinguished with dry powder sand. If there is smoke, it should not be inhaled. Get out of the dangerous place as soon as possible and ask for help. The superiors must always teach and regulate, and inspect frequently to remove hidden dangers. The book regulations require that the obvious places be hung up. Everyone will keep it in mind and be safe for a long time. The whole operation process is recorded in detail for traceability and accountability. This family is careful to prevent problems before they occur, and to ensure the safety of the factory.
Application Area
Coated red phosphorus has outstanding performance, oxygen resistance and moisture resistance, and is widely used in a variety of fields. First, it is used in the flame retardant industry, mixed with resins, plastics, and rubber to give it flame retardant properties and ensure safety. Second, it is used in the negative electrode of lithium-ion batteries to improve energy density and cycle life, and help energy development. Third, it is used in the manufacture of special chemicals such as matches, fireworks, and pesticides, and its stability is far superior to that of raw phosphorus, which is particularly valuable. And because of its surface coating, it reduces toxicity and spontaneous combustion, making it easy to transport and store. It is also used in the fields of electronic components, coatings, and optoelectronic materials, and meets the needs of high-tech. Overall, coated red phosphorus is expanding its application boundaries due to its unique properties, ranking an important position in chemical materials.
Research & Development
In the past, red phosphorus was a preparation. Because it was flammable, it was difficult to store it, but it was very effective in flame retardant use. Later generations of craftsmen studied its theory carefully, so they took the coating of red phosphorus as their priority. Start with polymer materials or inorganic coating to make the surface of the film grow, which can not only isolate air, but also prevent moisture, and the performance is more stable. The process needs to select raw materials, control temperature and humidity, and reverse the coating experiment to obtain a uniform and dense coating. The research is in-depth, but also to explore the way of dispersion in polymer materials, so that both efficient flame retardant and processing are convenient. Some scholars analyze the compatibility between the coating and the substrate to improve its migration resistance and storage life. Today, coated red phosphorus is widely used in plastics and electronics, not only to ensure safety, but also to expand its wide application. This all depends on continuous research and innovation, and the success of the development of things is indispensable.
Toxicity Research
Red phosphorus coating is used in many industries. However, red phosphorus is flammable by nature, and it spreads dust, which is easy to cause respiratory disorders. Today's coating is a fire-resistant layer, although it is comfortable in storage, its toxicity cannot be ignored. Coating red phosphorus, entering the body or touching the skin, may cause local inflammation, and the respiratory system is particularly fragile. Experiments exposed rodents with red phosphorus coating. Looking at their physical signs, it was seen that the microstructure of the lungs, liver and kidneys had many changes, indicating that accumulation may cause chronic poisoning. Aerosol inhalation can damage the alveoli, even cause micro-inflammation, and damage their physiological functions for a long time. If ingested in large doses, it is easy to see nausea, vomiting, abdominal pain, etc., and severe liver and kidney function are damaged. However, the coating layer hinders the activity and is slightly less toxic than pure phosphorus. However, it still needs careful protection to avoid long-term exposure before it can be safely used in the world.
Future Prospects
Red phosphorus coating is a wonder of new materials. It is temperature-resistant and flame-retardant, with outstanding performance, and is widely used in plastics, electronics, automobiles and many other fields. Today's technology is increasingly advanced, and the process is gradually improving. It is expected that the safety of coated red phosphorus will be even higher, the microstructure will become finer, and the environmental protection properties will become more significant. In the future, it will be combined with nanotechnology and intelligent manufacturing to develop high-performance composite materials to cope with extreme working conditions and expand the application territory. At the same time, the policy encourages green and low-carbon, and coated red phosphorus is the mainstream, which is bound to lead the innovation and change of material technology and promote the high-quality development of the industry. Looking to the future, red phosphorus coating products will stand on the global new material stage with excellent performance and sustainable concepts, and contribute to the progress of human society.
Where to Buy Coated Red Phosphorus in China?
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What are the main application fields of Coated Red Phosphorus?
The coated red phosphorus is based on red phosphorus, and the outer layer is covered with an inert protective layer. It has good oxidation resistance and moisture resistance. It is one of the most precious phosphorus materials. Its production method is complicated. First, the red phosphorus particles are wrapped in polymers or inorganic substances, and baked at high temperature to cut off contact with the outside air. Therefore, its chemical properties are stable, and the storage and transportation safety is far better than that of raw phosphorus. This material has a wide range of uses, especially the following ends.
First, it should be used in the field of flame retardants. Red phosphorus is a good flame retardant material, but bare phosphorus is easy to absorb moisture and oxidize, which is not good for long-term use. After coating, its stability increases and it is widely used in the manufacture of plastics, rubber, fibers, etc. In case of fire, red phosphorus is coated to release phosphoric acid, forming a carbon layer to cover the surface of the fuel and block oxygen to achieve flame retardant purposes. Electronic and electrical equipment, in particular, need high safety standards. Multi-coated red phosphorus is used to prepare engineering plastics to ensure its flame retardancy, thermal decomposition and low smoke toxicity.
Second, it is used in ignition devices such as safety matches and fireworks. The chemical properties of coated red phosphorus tend to be mild. As a safety match rubbing raw material, it is stable and controllable when ignited, and there is no danger of explosion. Pyrotechnic firecrackers and signal flares are favored by military and civilian fields because of their suitable detonation speed and mild response. Compared with white phosphorus, it is especially popular because of its high self-ignition point and is not easy to spontaneously burn due to friction at room temperature.
Third, it is used in pesticide preparation and electronics industry. The pesticide process requires phosphorus-containing intermediates, and coated red phosphorus gradually replaces traditional white phosphorus and yellow phosphorus in the synthesis of organophosphorus pesticides. In the field of electronics, coated red phosphorus is a reducing agent and special gas preparation raw material, with fine temperature control and pure reaction. It is conducive to the high cleanliness of electronic components, and its status is important year by year.
In addition, some special alloys are also used in melting, deoxidation, catalysts and fine chemical synthesis. But it is important in the fields of flame retardancy, ignition devices, electronics and pesticides. Due to the significant improvement in the safety and stability of coated red phosphorus, it has gradually become the mainstream of red phosphorus deep processing, making a significant contribution and having a profound impact on the modern industrial system.
First, it should be used in the field of flame retardants. Red phosphorus is a good flame retardant material, but bare phosphorus is easy to absorb moisture and oxidize, which is not good for long-term use. After coating, its stability increases and it is widely used in the manufacture of plastics, rubber, fibers, etc. In case of fire, red phosphorus is coated to release phosphoric acid, forming a carbon layer to cover the surface of the fuel and block oxygen to achieve flame retardant purposes. Electronic and electrical equipment, in particular, need high safety standards. Multi-coated red phosphorus is used to prepare engineering plastics to ensure its flame retardancy, thermal decomposition and low smoke toxicity.
Second, it is used in ignition devices such as safety matches and fireworks. The chemical properties of coated red phosphorus tend to be mild. As a safety match rubbing raw material, it is stable and controllable when ignited, and there is no danger of explosion. Pyrotechnic firecrackers and signal flares are favored by military and civilian fields because of their suitable detonation speed and mild response. Compared with white phosphorus, it is especially popular because of its high self-ignition point and is not easy to spontaneously burn due to friction at room temperature.
Third, it is used in pesticide preparation and electronics industry. The pesticide process requires phosphorus-containing intermediates, and coated red phosphorus gradually replaces traditional white phosphorus and yellow phosphorus in the synthesis of organophosphorus pesticides. In the field of electronics, coated red phosphorus is a reducing agent and special gas preparation raw material, with fine temperature control and pure reaction. It is conducive to the high cleanliness of electronic components, and its status is important year by year.
In addition, some special alloys are also used in melting, deoxidation, catalysts and fine chemical synthesis. But it is important in the fields of flame retardancy, ignition devices, electronics and pesticides. Due to the significant improvement in the safety and stability of coated red phosphorus, it has gradually become the mainstream of red phosphorus deep processing, making a significant contribution and having a profound impact on the modern industrial system.
What are the improvements in the safety performance of Coated Red Phosphorus compared to ordinary red phosphorus?
Red phosphorus is one of the elements, and its properties are safer than yellow phosphorus. However, there is still the risk of spontaneous combustion. In case of rubbing, bumping or high temperature, it is prone to phosphorus fire, and it is easy to absorb moisture into acids, and the damage is not small. If it is coated, that is, Coated Red Phosphorus, it is covered with a polymer or inorganic material to isolate the air and inhibit the erosion of moisture and acid gases. This move has several advantages: first, the coating layer prevents it from coming into contact with external oxygen, so the spontaneous combustion temperature is greatly increased, and the probability of ignition and explosion is greatly reduced; second, the coating is anti-wetting, and red phosphorus is no longer easy to absorb moisture into phosphoric acid, and the stability is significantly enhanced. It is not easy to change the composition or qualitative change during storage and transportation; third, the coating layer is mostly inert substances, such as resin, silicone, etc., which can improve the overall thermal stability of red phosphorus, that is, it is difficult to ignite easily when exposed to high temperatures. Fourth, the coating can reduce the risk of sparks caused by mechanical impact and friction, because the red phosphorus particles have a buffer armor outside. Fifth, the coating can also reduce the escape of red phosphorus dust, protect the health of the operator, and prevent phosphorus dust inhalation from damaging the lungs. Six, some coating materials have both flame retardant and antistatic effects, further enhancing the safety of storage, transportation, processing and application. Therefore, Coated Red Phosphorus has greatly improved its safety performance compared with ordinary red phosphorus, and can be widely used in fields with high standards such as flame retardant masterbatch, electronics, and military industry. However, the coating also needs to select materials to ensure its compatibility and long-term stability. Overall, Coated Red Phosphorus has excellent stability, reduces the risk of accidents, and is beneficial to storage and circulation. It is better than uncoated ordinary red phosphorus.
What are the requirements for storage and transportation of Coated Red Phosphorus?
If red phosphorus is coated, it is safer than normal red phosphorus. However, it is a commonly used product in chemical industry, and it is still suspected of being flammable. Therefore, when storing and transporting, be careful to prevent disasters. The storage room should be selected as a cool and ventilated place, away from fire, heat sources and high temperatures. It is forbidden to store with oxidants, strong acids, strong alkalis and flammable and explosive substances. Its utensils must be sealed to avoid moisture. If they are damp, there is a risk of spontaneous combustion. Iron drums and plastic drums should be used as containers, and the mouth should be capped to prevent air contamination.
The method of transportation is more expensive than handling it with care, and it should not be bumped. It is strictly forbidden to expose to the hot sun, and it is not allowed to be carried with food, feed, daily necessities and oxidized and corrosive substances. In case of fire, it should be quickly extinguished with dry sand and carbon dioxide, and must not be put out with water, for fear of the development of phosphine toxic gas. Transport vehicles must be equipped with corresponding fire extinguishers, and clearly indicate "flammable items", driving slowly, and the route should avoid the bustling and bustling city, so as to avoid accidents.
The way of management, clear responsibilities, properly set up a special person to guard, enter and exit are registered for inspection, and do not let unrelated personnel near. And the sealing state of the utensils should be checked regularly. If leakage or damage is found, it should be replaced urgently. In the storage place, there are fire-fighting equipment, such as sand boxes and carbon dioxide fire extinguishers, and the passage is smooth so as not to worry. Accumulation should not be excessive, and if the storage period is long, it should be inspected.
Although the coating red phosphorus has better properties, it should not be taken lightly and with caution. In this way, it can ensure safe storage and safe transportation. Every operation must be equipped with safety protective clothing and hats, without fear of dust attack. In case of escape, quickly collect it with a broom, and do not sprinkle water. Following this regulation, the disaster can be avoided, and it will be safe.
The method of transportation is more expensive than handling it with care, and it should not be bumped. It is strictly forbidden to expose to the hot sun, and it is not allowed to be carried with food, feed, daily necessities and oxidized and corrosive substances. In case of fire, it should be quickly extinguished with dry sand and carbon dioxide, and must not be put out with water, for fear of the development of phosphine toxic gas. Transport vehicles must be equipped with corresponding fire extinguishers, and clearly indicate "flammable items", driving slowly, and the route should avoid the bustling and bustling city, so as to avoid accidents.
The way of management, clear responsibilities, properly set up a special person to guard, enter and exit are registered for inspection, and do not let unrelated personnel near. And the sealing state of the utensils should be checked regularly. If leakage or damage is found, it should be replaced urgently. In the storage place, there are fire-fighting equipment, such as sand boxes and carbon dioxide fire extinguishers, and the passage is smooth so as not to worry. Accumulation should not be excessive, and if the storage period is long, it should be inspected.
Although the coating red phosphorus has better properties, it should not be taken lightly and with caution. In this way, it can ensure safe storage and safe transportation. Every operation must be equipped with safety protective clothing and hats, without fear of dust attack. In case of escape, quickly collect it with a broom, and do not sprinkle water. Following this regulation, the disaster can be avoided, and it will be safe.
What is the flame retardant mechanism of Coated Red Phosphorus?
Red phosphorus, a kind of phosphorus, is red in color and very lively. However, if it is only mixed into the polymer material in its original state, it is easy to absorb moisture and spontaneous combustion, and it is very difficult to use. Therefore, people use red phosphorus as the basis, and the coating is made of inorganic or organic layers to form "coated red phosphorus", which is the essential product of flame retardant materials today. Its mechanism should be described separately.
When the flame attacks, the heat drives the red phosphorus to decompose, releasing phosphine and various phosphorus-containing free radicals. At that time, the coated layer can not only prevent the direct contact of red phosphorus with oxygen, delay its heating and reaction rate, but also prevent the spontaneous combustion of red phosphorus, and ensure the stability of its storage and processing. Once the high temperature is high enough to destroy the coating, red phosphorus is excited, and its flame retardant effect appears in three ways:
One is the condensed phase flame retardant. When the polymer is thermally decomposed, red phosphorus promotes its dehydration and carbonization, and a dense carbon shell is formed on the surface of the material, which not only isolates the invasion of oxygen, but also inhibits the spread of combustion. The carbon shell is tough and corresponds to the end, making it difficult for heat to penetrate and retains its shape. All these effects are obtained from the catalysis of phosphorus ions.
The second is gas phase flame retardancy. Red phosphorus is heated, releasing phosphorus-related radicals, which capture highly reactive radicals (such as · H, · OH) in the combustion reaction in the flame zone. If the bottom is drawn, the chain reaction is suppressed and the fire is greatly reduced. The flame is deactivated, the heat flux drops sharply, and the incineration is difficult to continue.
The third is the isolation effect. The coating layer of red phosphorus, when heated, itself or participates in the formation of other products, generates a coating or expansion layer, and blocks gas and heat insulation, further improving the fire resistance of the material. In addition, if there are components such as aluminum hydroxide in the coating agent, it can also generate water vapor, take away heat, and benefit the fire insulation.
To sum up, coating red phosphorus to stabilize the storage activity, and entering the polymer material has the flame retardant power in both the condensation and gas phase worlds. At the same time, it generates a heat insulation barrier and triple protection, so it is widely used.
When the flame attacks, the heat drives the red phosphorus to decompose, releasing phosphine and various phosphorus-containing free radicals. At that time, the coated layer can not only prevent the direct contact of red phosphorus with oxygen, delay its heating and reaction rate, but also prevent the spontaneous combustion of red phosphorus, and ensure the stability of its storage and processing. Once the high temperature is high enough to destroy the coating, red phosphorus is excited, and its flame retardant effect appears in three ways:
One is the condensed phase flame retardant. When the polymer is thermally decomposed, red phosphorus promotes its dehydration and carbonization, and a dense carbon shell is formed on the surface of the material, which not only isolates the invasion of oxygen, but also inhibits the spread of combustion. The carbon shell is tough and corresponds to the end, making it difficult for heat to penetrate and retains its shape. All these effects are obtained from the catalysis of phosphorus ions.
The second is gas phase flame retardancy. Red phosphorus is heated, releasing phosphorus-related radicals, which capture highly reactive radicals (such as · H, · OH) in the combustion reaction in the flame zone. If the bottom is drawn, the chain reaction is suppressed and the fire is greatly reduced. The flame is deactivated, the heat flux drops sharply, and the incineration is difficult to continue.
The third is the isolation effect. The coating layer of red phosphorus, when heated, itself or participates in the formation of other products, generates a coating or expansion layer, and blocks gas and heat insulation, further improving the fire resistance of the material. In addition, if there are components such as aluminum hydroxide in the coating agent, it can also generate water vapor, take away heat, and benefit the fire insulation.
To sum up, coating red phosphorus to stabilize the storage activity, and entering the polymer material has the flame retardant power in both the condensation and gas phase worlds. At the same time, it generates a heat insulation barrier and triple protection, so it is widely used.
What are the typical physicochemical properties of Coated Red Phosphorus?
Coated Red Phosphorus is coated with a special coating, or coated with a polymer, or coated with a flame retardant to improve its physical and chemical properties. Its properties are reddish-brown powder, loose in quality, slightly dull in luster, and slightly odor. Compared with uncoated ones, the stability is greatly enhanced, and it is not easy to react strongly with oxygen in the air. The coating can block moisture, so it is not easy to be damp and agglomerate, the storage period is prolonged, and the quality is constant.
Its density is about 2 to 2.5 grams per cubic centimeter, and its melting point is high. If white phosphorus is flammable, it will not burn in case of an open flame. It needs more than 250 degrees Celsius to start the reaction. Its chemical reaction activity is moderate, insoluble in water, and does not react in acid and alkaline solutions. However, if it is co-located with strong oxidants, it is still dangerous to burn. Various coating processes can significantly weaken its spontaneous combustion and explosiveness, and its safety performance is better than that of ordinary red phosphorus, especially suitable for industrial production and storage and transportation.
Coating the surface of red phosphorus is mostly made of polyvinyl alcohol, phenolic resin, epoxy polymer materials, or carrier graphite. Such materials are strong, provide physical isolation, and can inhibit the direct contact of red phosphorus with air, moisture, and other substances. Its heat resistance is enhanced, and its chemical stability is also outstanding. The thickness of the coating and the quality of the material all affect its flame retardancy and safety performance. In polymer materials, plastics, and rubber, it is mostly used as a flame retardant, which has both high efficiency and safety.
This product is non-toxic, not as fierce as yellow phosphorus, and can avoid worker poisoning. However, if it is used for a long time at high temperature or under severe impact, it is still necessary to beware of flame splashing or smoke damage. Looking at its physical and chemical properties, coated red phosphorus can be said to be safe and stable, which not only maintains flame retardant effect, but also facilitates storage and transportation. It is one of the most superior products among industrial phosphorus.
Its density is about 2 to 2.5 grams per cubic centimeter, and its melting point is high. If white phosphorus is flammable, it will not burn in case of an open flame. It needs more than 250 degrees Celsius to start the reaction. Its chemical reaction activity is moderate, insoluble in water, and does not react in acid and alkaline solutions. However, if it is co-located with strong oxidants, it is still dangerous to burn. Various coating processes can significantly weaken its spontaneous combustion and explosiveness, and its safety performance is better than that of ordinary red phosphorus, especially suitable for industrial production and storage and transportation.
Coating the surface of red phosphorus is mostly made of polyvinyl alcohol, phenolic resin, epoxy polymer materials, or carrier graphite. Such materials are strong, provide physical isolation, and can inhibit the direct contact of red phosphorus with air, moisture, and other substances. Its heat resistance is enhanced, and its chemical stability is also outstanding. The thickness of the coating and the quality of the material all affect its flame retardancy and safety performance. In polymer materials, plastics, and rubber, it is mostly used as a flame retardant, which has both high efficiency and safety.
This product is non-toxic, not as fierce as yellow phosphorus, and can avoid worker poisoning. However, if it is used for a long time at high temperature or under severe impact, it is still necessary to beware of flame splashing or smoke damage. Looking at its physical and chemical properties, coated red phosphorus can be said to be safe and stable, which not only maintains flame retardant effect, but also facilitates storage and transportation. It is one of the most superior products among industrial phosphorus.
