Halogen Free Flame Retardant for Rigid PU Foam
| HS Code | 461940 |
| Flammability | Low flammability to meet fire safety standards |
| Halogen Content | Zero halogen content |
| Thermal Stability | Good thermal stability |
| Mechanical Strength | Sufficient mechanical strength for rigid applications |
| Chemical Resistance | Resistant to common chemicals |
| Density | Appropriate density for the intended use |
| Insulation Properties | Good thermal insulation properties |
| Aging Resistance | Good aging resistance |
| Processability | Easily processable into rigid PU foam |
| Smoke Generation | Low smoke generation during combustion |
As an accredited Halogen Free Flame Retardant for Rigid PU Foam factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | 50 - kg bags of Halogen - Free Flame Retardant for Rigid PU Foam, packaged securely. |
| Storage | **Storage Description for Halogen - Free Flame Retardant for Rigid PU Foam** Store the halogen - free flame retardant for rigid PU foam in a cool, dry place. Keep it away from direct sunlight and heat sources to prevent degradation. Ensure the storage area is well - ventilated. Store in tightly - sealed containers to avoid moisture absorption and contact with reactive substances that could affect its performance. |
| Shipping | Halogen - Free Flame Retardant for Rigid PU Foam is shipped in sealed, durable containers. Transport follows strict chemical safety regulations, ensuring secure handling during transit to prevent any spills or damage. |
Competitive Halogen Free Flame Retardant for Rigid PU Foam 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.
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Historical Development
Tracing back to the rise of polyurethane rigid foam, it is widely used in building materials, refrigeration and other fields due to its thermal insulation and heat insulation effects. Early flame retardants were mostly halogen-based. Although they could strongly resist fires, they were easy to release toxic gases when burned, which damaged environmental protection and human safety. It was scientists who worked hard to think of halogen-free strategies. At the end of the 20th century, a new generation of halogen-free flame retardants came into being. Phosphorus, nitrogen compounds and inorganic materials were used, which not only maintained flame retardant power, but also benefited the environment. After technological refinement and material innovation, the performance of halogen-free flame retardant polyurethane rigid foam has been perfected and is widely respected. Today's halogen-free flame retardants are not only in line with the trend of green and low-carbon, but also in line with the national energy conservation and emission reduction policy. Although the road ahead is long, the prospect is wider, and it will greatly promote the prosperity of the new material industry.
Product Overview
This product is a halogen-free flame retardant, which is specially used for rigid polyurethane foam. Its quality is pure, its performance is superior, and it can be evenly distributed in the foam structure without damaging the color and strength of the original material. In case of fire, it will inhibit the burning vine, which can effectively slow down the combustion rate and reduce the escape of harmful flue gas and toxins. The production method is excellent, and it does not contain halogen harmful substances. It not only conforms to the trend of environmental protection, but also benefits human health. It is widely used in construction, refrigeration and heat insulation, which can play a lasting role in flame retardancy and keep the material stable. Easy to be compatible with a variety of raw materials, convenient process, and can be applied on demand. Compared with the commercially available halogen flame retardant products, it is more safe and environmentally friendly.
Physical & Chemical Properties
This halogen-free flame retardant is specially used for rigid polyurethane foam. If it is white or light yellow powder, it is very stable and insoluble in water. Its specific gravity is light, its dispersion is good, and it is non-corrosive at room temperature and has no pungent odor. In case of high temperature, it releases flame retardant factors, which can effectively inhibit the spread of flame and delay thermal decomposition, and the shape and quality remain unchanged. The chemical structure does not contain halogen, and does not generate toxic gases in case of fire, reducing smoke and dust, which meets the needs of environmental protection. It is evenly distributed in the polyurethane system, which enhances the overall performance of the material, and is well compatible with other components, without affecting the original mechanical properties. Acid and alkali resistance, anti-aging, not easy to oxidize in the air, chemical properties are very stable, and can be stored for a long time without deterioration.
Technical Specifications & Labeling
Halogen Free Flame Retardant is used for rigid polyurethane foam. The color is white or yellowish. The appearance is powdery. The particle size distribution is fine. It is soluble in common organic solvents and has a density of about 1.3 grams per cubic centimeter. Its melting point is as high as 270 degrees Celsius, and the thermal decomposition temperature is over 300 degrees. Low volatility and excellent weather resistance. It mainly contains phosphorus and nitrogen, and halogen is not seen. The dosage is moderate, and the foam can be given excellent flame retardant properties. The LOI value can reach more than 30. After UL-94 test, V-0 grade can be obtained. It has good compatibility with the polyurethane system and does not affect the foaming and physical properties. The packaging is preferably in a 25 kg woven bag. Store in a cool and dry place to avoid sun exposure and moisture. Clear identification, complete batch, origin and date, easy to identify and trace.
Preparation Method
Yellow phosphorus and phosphorus trioxide were selected as raw materials, with polyols and halogen-free flame retardants, weighed according to quantity, and precisely mixed in a high-temperature reactor. Preliminary heating to one hundred and fifty degrees Celsius, slowly adding an organic phosphine source, so that phosphine ester compounds interact with polyols, and obtain intermediates that are both flame retardant and foaming properties. Continued addition of isocyanate, combined with catalytic thin layer of triethylamine, controlled temperature within 200 degrees, stirred to promote the reaction, and gradually formed a polyurethane skeleton. During the whole process, the polyol served as the main chain carrier, driving the block copolymerization reaction of phosphine ester and isocyanate. The work of the catalyst is to activate the isocyanate, promote the nucleophilic addition of microscopic side groups, and improve the reaction rate. Finally, the product is precipitated, shaped and dried in vacuum to obtain a halogen-free flame retardant polyurethane rigid foam product.
Chemical Reactions & Modifications
Halogen flameless flame retardants are used in rigid polyurethane foam, and their chemical reactions and modification methods are profound. It is based on elements such as phosphorus and nitrogen and integrated into the foam matrix. Compared with traditional halogen systems, it not only avoids toxic gas flow, but also maintains low smoke and environmental protection. In the process, phosphorus-based flame retardants are mixed with isocyanates and polyether polyols and extruded at high temperature to generate a three-dimensional network structure, which has outstanding flame retardant performance. There are hydrogen bonds and van der Waals forces to stabilize. During the modification process, organophosphorus, phosphonate, guanidine salts, etc. are added to improve affinity and dispersion, so that the flame retardant and polyurethane chains are closely combined to improve fire suppression efficiency. Through cross-linking and surface coating methods, the microstructure density is enhanced, and its heat resistance and mechanical properties are enhanced. Overall, the chemical reaction and modification of halogen flameless flame retardants not only take into account safety and environmental protection, but also high efficiency and durability, which is a great achievement in the research and development of new materials.
Synonyms & Product Names
Those who are synonymous are referred to as one thing but have different names. Today's product "halogen-free flame retardant" is used in rigid polyurethane foam, and the name in the world is not the same. Or "halogen-free flame retardant additive", or "environmentally friendly flame retardant auxiliary", all refer to such halogen-free compound products. Also known as "green flame retardant" and "new halogen-free flame retardant", their essence is not different, but their names are different. There are "Haloguard", "EcoFlame", "PU special halogen-free flame retardant powder" on the market, etc., or use English foreign names to see its novelty, or take ancient names to recognize its environmental protection. Its connotation is to avoid halogen damage, improve fire resistance, and replace rigid polyurethane industrial products. The name changes, wherever and whenever, but what it refers to belongs to the same kind. Now distinguish the names, make clear their similarities and differences, so that those who know will not be confused.
Safety & Operational Standards
Halogen Free Flame Retardant for Rigid PU Foam is also a non-halogen flame retardant, which is widely used in the preparation and processing of polyurethane hard foam. Although its quality is safe, if it is used, it may cause trouble. Therefore, the operation must abide by safety and operation regulations. Ventilation in the first place is the first priority. Open the window to make the airflow smooth and prevent the accumulation of harmful gases. Next time, it is advisable to wear appropriate protective gear, such as gloves, goggles and dust masks, to avoid the harm of skin and eyes inhalation. Store in a dry and cool place to avoid the sun and sun, away from the heat source of fire, and should not be stored with strong oxidants, strong acids and alkalis and other sundries. And it is appropriate to seal the bag tightly, so as not to expose it for a long time. When activated, pour slowly, do not disturb, so as not to generate droplet aerosol. If there is a splash, rinse the skin with water quickly, and wash the clothes easily. If it enters the eye, rinse it with running water in time and seek medical attention quickly.
Fire extinguishing equipment should be prepared in the operation room to prevent disasters. In case of fire, do not use water to put it out. Dry powder and carbon dioxide fire extinguishers should be used as the top. After the operation, you must clean your hands and face, do not rub your eyes and noses with your hands, and dispose of the remaining materials in accordance with local environmental protection laws. It is strictly forbidden to sprinkle at will to prevent pollution to the environment. In case of transportation and loading and unloading, handle it with care to prevent damage to the packaging materials. If there is leakage in the outsourcing, do not deal with it by the usual method. It needs to be covered with sand and soil. After collection and backup, it should be handled specially. Do not flow into sewers and water sources. Management and operators, etc., need to learn safety measures at room temperature, and pay attention to proper lighting at night.
In case of accidental ingestion, you should wait immediately. Do not induce vomiting. Call for rescue and send to the hospital quickly, and carry safety instructions or labels with you. Do not approach the work area with children or unrelated personnel. Post warnings at the warehouse and conduct regular inspections. Abide by the above regulations to keep your health and equipment healthy, which is in line with the importance of environmental protection.
Fire extinguishing equipment should be prepared in the operation room to prevent disasters. In case of fire, do not use water to put it out. Dry powder and carbon dioxide fire extinguishers should be used as the top. After the operation, you must clean your hands and face, do not rub your eyes and noses with your hands, and dispose of the remaining materials in accordance with local environmental protection laws. It is strictly forbidden to sprinkle at will to prevent pollution to the environment. In case of transportation and loading and unloading, handle it with care to prevent damage to the packaging materials. If there is leakage in the outsourcing, do not deal with it by the usual method. It needs to be covered with sand and soil. After collection and backup, it should be handled specially. Do not flow into sewers and water sources. Management and operators, etc., need to learn safety measures at room temperature, and pay attention to proper lighting at night.
In case of accidental ingestion, you should wait immediately. Do not induce vomiting. Call for rescue and send to the hospital quickly, and carry safety instructions or labels with you. Do not approach the work area with children or unrelated personnel. Post warnings at the warehouse and conduct regular inspections. Abide by the above regulations to keep your health and equipment healthy, which is in line with the importance of environmental protection.
Application Area
Halogen flameless flame retardant, specially used in rigid polyurethane foam, is widely used in many fields. It is known for its environmental protection and stability, does not generate harmful gas, and is widely used in industry, construction, and transportation. Building room walls, covering roofs, or cold storage insulation, must rely on solid and flame retardant materials to be able to sleep without worry. Vehicles and ships need light heat insulation and flame retardant products, so this foam must be used to ensure travel safety. Electrical enclosures and pipes are covered, and I also like to use this product, which has excellent fire resistance and benefits its lifespan. It is the power of flame suppression, surpassing conventional flame retardants, does not invade people, does not pollute the world, and is in line with the contemporary green development. Those who desire thermal insulation, fire protection, and longevity can choose halogen flameless flame retardant foam to meet their needs.
Research & Development
The way of research and development is always innovation. Polyurethane rigid foam is widely used in thermal insulation building materials, but it is flammable and difficult to prevent fires. Bromine and chlorine are flame retardant, although effective, but halogens escape, damaging the environment and harming health. In response to this shortcoming, scholars have devoted themselves to the development of halogen-free flame retardants. It is mainly phosphorus and nitrogen, supplemented by antimony, silicon and other elements, or self-generating carbon layers, to suppress fire, or endothermic decomposition, and inhibit smoke and dust. Experiments have been carried out repeatedly, and the proportions have been refined. It is not only necessary to resist fire, but also to ensure that the foam structure is uniform and the mechanical properties do not fall. After many rounds of improvement, new halogen-free flame retardant products have been prepared, with good fire resistance, minimal volatiles, environmental protection and energy saving. The application of the technique is beneficial to people and the world.
Toxicity Research
Halogen flame retardants such as bromine and chlorine are widely used in rigid polyurethane foam. However, due to their decomposition, they can release harmful gases and endanger human safety. Modern scholars have turned to developing new halogen-free flame retardants. These materials are mainly phosphorus-based, nitrogen-based and inorganic substances, and their smoke generation during combustion is low, and the products are non-toxic halides. However, to study their toxicity, animal experiments and cell testing are required. Experiments show that conventional halogen-free flame retardants added to polyurethane foam have little irritation to the respiration and skin of mammals, and the main metabolites have no carcinogenic mutation trend. The degradation in the environment can be used by microorganisms, and the bioaccumulation is extremely low. Overall assessment shows that halogen-free flame retardants are less toxic than halogens. If processed and used properly, they are conducive to safety and environmental protection, and are suitable for wide promotion.
Future Prospects
Halogen flame retardants originated at the beginning of chemical technology. Although they can contain fires, their residual toxicity and environmental pollution have been criticized by the world. With the progress of science and technology, green environmental protection has become the trend, and halogen free flame retardants are gradually respected. From the perspective of analytical polyurethane foam materials, halogen-free flame retardants not only reduce the escape of harmful gases, but also show excellent flame retardant performance at high temperatures. In the future, they may combine new methods such as nanomaterials and phosphorus and nitrogen synergy to improve mechanical and thermal stability, and help achieve low-cost large-scale application. With the increasingly stringent regulations in various countries, the demand for green flame retardant materials is increasing, and halogen-free flame retardant polyurethane foam is leading the trend. Looking forward to the future, the more efficient the manufacturing process and the better the product performance, it will become the mainstay of the construction, transportation and other fields, and effectively promote the green and low-carbon transformation of the materials industry.
Where to Buy Halogen Free Flame Retardant for Rigid PU Foam in China?
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As a leading Halogen Free Flame Retardant for Rigid PU Foam 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 ingredients in Halogen Free Flame Retardant for Rigid PU Foam?
Halogen Free Flame Retardant is dedicated to Rigid PU Foam, and its main components are phosphorus-based compounds and nitrogen-based compounds. Among the phosphorus series, organic phosphates are the most commonly used, such as tripolyphosphate, ammonium polyphosphate and diethanolamine phosphate, etc., or undecyl phosphonates are used. These compounds are free of halogen and form polyphosphoric acids during combustion, which can isolate oxygen and inhibit the spread of combustion. Inorganic fillers such as aluminum hydroxide and magnesium hydroxide are often added, which decompose thermally during combustion and release water, which not only reduces the temperature, but also dilutes the flammable gas, and does not release volatile harmful substances. Among the nitrogen series, melamine and its derivatives, cyanurates, etc., are more common. They decompose and release nitrogen when heated, which helps to expand the foam structure, form a carbon layer, and enhance flame retardancy. It can also be compounded with phosphorus series for synergistic effect, making the foam carbonized and solid, suppressing smoke and fire protection.
In addition to the above, polymeric flame retardants are still used. The monomer contains phosphorus and nitrogen elements, making the polyurethane body flame retardant without additives. This method can avoid migration and precipitation and enhance the durability of the material. Some preparations are also supplemented with silicones to improve the stability of the foam structure and the synergistic fire efficiency of the flame retardant interface.
Overall, the ingredients used in Halogen Free Flame Retardant are environmentally friendly and halogen-free, low-toxicity and high-efficiency. Phosphorus, nitrogen and inorganic hydroxides, either alone or in combination, are properly matched, so that the polyurethane rigid foam is both flame retardant and carbonized, and the performance is not damaged. Ancient and modern materials and technologies have been progressively innovated, and the world's bitter halogens have been poisonous for a long time. Therefore, it is a way to reconcile the environment and technology.
In addition to the above, polymeric flame retardants are still used. The monomer contains phosphorus and nitrogen elements, making the polyurethane body flame retardant without additives. This method can avoid migration and precipitation and enhance the durability of the material. Some preparations are also supplemented with silicones to improve the stability of the foam structure and the synergistic fire efficiency of the flame retardant interface.
Overall, the ingredients used in Halogen Free Flame Retardant are environmentally friendly and halogen-free, low-toxicity and high-efficiency. Phosphorus, nitrogen and inorganic hydroxides, either alone or in combination, are properly matched, so that the polyurethane rigid foam is both flame retardant and carbonized, and the performance is not damaged. Ancient and modern materials and technologies have been progressively innovated, and the world's bitter halogens have been poisonous for a long time. Therefore, it is a way to reconcile the environment and technology.
What are the advantages of Halogen Free Flame Retardant for Rigid PU Foam over Halogen Containing Flame Retardants?
Today's rubber products, polyurethane rigid foam, are widely used in construction, home furnishing, and refrigeration industries. In order to prevent fires, flame retardants are applied in the production process. In the past, halogen-containing materials were used more, but they were awesome. Today's new halogen-free flame retardants have many advantages over halogen-containing ones.
Halogen-containing flame retardants release halogen gas in case of fire, which can prevent the spread of flames. However, when burned, chlorine, bromine and other toxic fumes are often released, which can easily cause poisoning and suffocation, damage people's health, and pollute the air environment. After incineration, the residue is also toxic, and if it accumulates for a long time, it is harmful to water and soil. Therefore, environmental protection regulations have become increasingly strict, so people have been urged to explore halogen-free methods.
Halogen-free flame retardants, mostly phosphorus, nitrogen and other elements, mainly generate harmless gas and carbon layer when burning, isolating oxygen and slowing down combustion. Its advantages are four: First, there is little smoke and harmful gases during hot cracking or combustion, ensuring the safety of humans and animals. Second, its carbonization performance is good, forming a solid carbon layer, enhancing the material's self-extinguishing ability and reducing the spread of fire. Third, during production and use, the environmental harm is much lower than that of halogen-containing flame retardants, which is beneficial to ecological sustainability. Fourth, it adapts to domestic and foreign green standards and can expand the market.
As for the process, halogen-free flame retardants and polyurethane have good compatibility and stable material properties. The foam has a uniform structure, no bad odor, and strong aging resistance. Although the cost is slightly higher, its economy is becoming increasingly apparent with the advancement of industrial technology.
To sum up, the application of halogen-free flame retardants in polyurethane rigid foams has many advantages such as environmental protection, safety, excellent performance, and compliance with future regulations. It is actually the trend of the times and has much to do.
Halogen-containing flame retardants release halogen gas in case of fire, which can prevent the spread of flames. However, when burned, chlorine, bromine and other toxic fumes are often released, which can easily cause poisoning and suffocation, damage people's health, and pollute the air environment. After incineration, the residue is also toxic, and if it accumulates for a long time, it is harmful to water and soil. Therefore, environmental protection regulations have become increasingly strict, so people have been urged to explore halogen-free methods.
Halogen-free flame retardants, mostly phosphorus, nitrogen and other elements, mainly generate harmless gas and carbon layer when burning, isolating oxygen and slowing down combustion. Its advantages are four: First, there is little smoke and harmful gases during hot cracking or combustion, ensuring the safety of humans and animals. Second, its carbonization performance is good, forming a solid carbon layer, enhancing the material's self-extinguishing ability and reducing the spread of fire. Third, during production and use, the environmental harm is much lower than that of halogen-containing flame retardants, which is beneficial to ecological sustainability. Fourth, it adapts to domestic and foreign green standards and can expand the market.
As for the process, halogen-free flame retardants and polyurethane have good compatibility and stable material properties. The foam has a uniform structure, no bad odor, and strong aging resistance. Although the cost is slightly higher, its economy is becoming increasingly apparent with the advancement of industrial technology.
To sum up, the application of halogen-free flame retardants in polyurethane rigid foams has many advantages such as environmental protection, safety, excellent performance, and compliance with future regulations. It is actually the trend of the times and has much to do.
How much Halogen Free Flame Retardant for Rigid PU Foam is added to rigid polyurethane foam?
In rigid polyurethane foam, the amount of halogen-free flame retardants should be determined according to the foam formula, the characteristics of the raw materials used, and the target flame retardant grade. Common halogen-free flame retardants, including phosphorus, nitrogen, and inorganic, are used to improve the fire resistance of materials and reduce the release of soot and harmful gases. Today, halogen-free flame retardants are used, and ammonium tripolyphosphate, red phosphorus, ammonium polyphosphate, expandable graphite, etc. are mostly selected, and the dosages vary.
In the formulation method, the design goals must be weighed first, and the products must meet UL 94 V-0, B1 and other standards. Usually the dosage is 5 to 25% of the total formula quality, but it is by no means a generalization. For example, the addition of ammonium tripolyphosphate is usually 10% to 20%, and is slightly adjusted with foam density, blowing agent, and the ratio of isocyanate to polyol. If ammonium polyphosphate is used, the common addition amount is also around 10%, and for those with high flame retardant requirements, about 15% is desirable. If it is used to improve the performance of carbon formation in case of fire, it can be appropriately increased or decreased to make it compatible with polyols and catalysts. If amines or nitrogen-based flame retardants are used, the addition amount is slightly lower, about 5% to 10%, which can achieve good results and is not easy to affect the mechanical properties of the foam. As for inorganic agents such as talc powder and expandable graphite, it is often supplemented by a ratio of 10% to 25%, supplemented by other flame retardants, which can be synergistic. It must be noted that if the flame retardant effect is enhanced too much, the foam strength and foam fineness will be damaged, the foam body will be brittle, and the process will also be variable. Therefore, when adjusting the ratio, it is advisable to repeatedly test and increase incrementally, fine-tune the foam fluidity, foaming height and curing time limit to make it stable.
However, there may be discrepancies between the laboratory and the actual production. It is recommended to test it before use and gradually adjust the formula to meet the dual needs of flame retardant and environmental protection in construction, automotive and other fields. Overall, the amount of halogen-free flame retardants added to rigid polyurethane foam varies from 5% to 25% depending on the type of flame retardant, target grade, and foam formula. It is only advisable to review in detail with the actual process, step by step, and not excessive.
In the formulation method, the design goals must be weighed first, and the products must meet UL 94 V-0, B1 and other standards. Usually the dosage is 5 to 25% of the total formula quality, but it is by no means a generalization. For example, the addition of ammonium tripolyphosphate is usually 10% to 20%, and is slightly adjusted with foam density, blowing agent, and the ratio of isocyanate to polyol. If ammonium polyphosphate is used, the common addition amount is also around 10%, and for those with high flame retardant requirements, about 15% is desirable. If it is used to improve the performance of carbon formation in case of fire, it can be appropriately increased or decreased to make it compatible with polyols and catalysts. If amines or nitrogen-based flame retardants are used, the addition amount is slightly lower, about 5% to 10%, which can achieve good results and is not easy to affect the mechanical properties of the foam. As for inorganic agents such as talc powder and expandable graphite, it is often supplemented by a ratio of 10% to 25%, supplemented by other flame retardants, which can be synergistic. It must be noted that if the flame retardant effect is enhanced too much, the foam strength and foam fineness will be damaged, the foam body will be brittle, and the process will also be variable. Therefore, when adjusting the ratio, it is advisable to repeatedly test and increase incrementally, fine-tune the foam fluidity, foaming height and curing time limit to make it stable.
However, there may be discrepancies between the laboratory and the actual production. It is recommended to test it before use and gradually adjust the formula to meet the dual needs of flame retardant and environmental protection in construction, automotive and other fields. Overall, the amount of halogen-free flame retardants added to rigid polyurethane foam varies from 5% to 25% depending on the type of flame retardant, target grade, and foam formula. It is only advisable to review in detail with the actual process, step by step, and not excessive.
Does Halogen Free Flame Retardant for Rigid PU Foam Affect the Physical Properties of Foam?
Halogen free flame retardants are used in rigid polyurethane foam, which can curb the spread of flame and is beneficial to safety. However, it may be considered that it will affect the physical properties of the foam. Without generalization, describe it one by one to explain its disadvantages and advantages. The integration of flame retardants lies in its compatibility and dispersion. If it is compatible with the parent, the physical properties will change slightly. Otherwise, the foam structure will inevitably differ.
Flame retardants or change the foaming reaction speed, which affects the size and uniformity of the foam pores. If the pores are loose and uneven, their mechanical strength and thermal insulation properties will be affected. In addition, some halogen-free flame retardants are inorganic. If their particle size is large and the distribution is uneven, the foam will be unevenly stressed and prone to brittle cracking. However, if the product with fine particle size and easy dispersion is selected, this disadvantage can be alleviated, but the process needs to be increased in precision to adapt to it.
The chemical properties of flame retardants may react with the polyurethane main chain to modify the chain structure, or enhance or suppress the elasticity and aging resistance of the material. There are also halogen-free environmentally friendly to dissolve in the reaction components, which is conducive to uniform structure. However, when the dosage is high, the foam foam may be limited, the bulk density will increase, and the apparent hardness will become thicker. Innovative phosphorus and nitrogen flame retardants have both smoke suppression and fire resistance, and the side effects are small, but they also need to be matched with the substrate as appropriate.
Usually, an appropriate amount of high-quality halogen free flame retardant is applied, which has a slight impact on the overall performance of the foam, but the appropriate construction process is required. If the amount is large or the type is not selected properly, it is easy to reduce the strength and reduce the heat insulation. In order to completely suppress the adverse effects, when reconciling the proportion of components, optimizing the foaming process, and selecting the flame retardant category, it is especially necessary to determine the actual application performance requirements. In summary, halogen-free flame retardants applied to rigid polyurethane foam can slightly damage or slightly benefit its physical properties. However, the appropriate choice can be considered both safety and practicality.
Flame retardants or change the foaming reaction speed, which affects the size and uniformity of the foam pores. If the pores are loose and uneven, their mechanical strength and thermal insulation properties will be affected. In addition, some halogen-free flame retardants are inorganic. If their particle size is large and the distribution is uneven, the foam will be unevenly stressed and prone to brittle cracking. However, if the product with fine particle size and easy dispersion is selected, this disadvantage can be alleviated, but the process needs to be increased in precision to adapt to it.
The chemical properties of flame retardants may react with the polyurethane main chain to modify the chain structure, or enhance or suppress the elasticity and aging resistance of the material. There are also halogen-free environmentally friendly to dissolve in the reaction components, which is conducive to uniform structure. However, when the dosage is high, the foam foam may be limited, the bulk density will increase, and the apparent hardness will become thicker. Innovative phosphorus and nitrogen flame retardants have both smoke suppression and fire resistance, and the side effects are small, but they also need to be matched with the substrate as appropriate.
Usually, an appropriate amount of high-quality halogen free flame retardant is applied, which has a slight impact on the overall performance of the foam, but the appropriate construction process is required. If the amount is large or the type is not selected properly, it is easy to reduce the strength and reduce the heat insulation. In order to completely suppress the adverse effects, when reconciling the proportion of components, optimizing the foaming process, and selecting the flame retardant category, it is especially necessary to determine the actual application performance requirements. In summary, halogen-free flame retardants applied to rigid polyurethane foam can slightly damage or slightly benefit its physical properties. However, the appropriate choice can be considered both safety and practicality.
Is Halogen Free Flame Retardant for Rigid PU Foam compliant with the latest environmental regulations?
In recent years, the global law of environmental protection has become more and more severe. All industries involved in chemicals, building materials, electronics and thermal insulation must comply with environmental protection standards. Cover the fear of traditional halogenated flame retardants such as bromine and chlorine, which are prone to release toxic flue gas and corrosive gases in fires, harming humans and animals and polluting the environment. The European Union, the United States and East Asian countries have promulgated regulations that stipulate that flame retardant materials must be halogen-free, low-toxic and degradable. Such as the European Union RoHS Directive and REACH regulations, harmful substances such as PBDE and PBB are strictly prohibited or restricted. Emerging green building materials standards are also becoming more stringent in order to reduce the environmental burden.
Halogen Free Flame Retardant (Halogen Free Flame Retardant) was developed in response to the new regulations and is suitable for Rigid PU Foam (rigid polyurethane foam). Its main ingredients are phosphorus, nitrogen or inorganic materials, and it does not release halogens during combustion, resulting in a significant reduction in flue gas toxicity. After some products have been certified, such as UL 94 V-0, RoHS compliance, and REACH registration, they can all be identified. These types of flame retardants not only avoid the environmental risks of halogen, but also meet the requirements of SVHC substances of high concern. In recent years, Green Building international certifications such as LEED and BREEAM also require low toxicity and low emissions, so the application of halogen-free flame retardants is more and more extensive.
However, the specifications are changing with each passing day, and the specific formula and dosage must be carefully examined, taking into account new restriction items such as PFAS, so that it can be said to be complete. Some regions have begun to prudently evaluate certain organophosphorus and phosphine substances, and require enterprises to declare in a timely manner. If the finished product is certified by CB, CE, UL or domestic green products, it can be confirmed that its environmental compliance can be confirmed. If the Halogen Free Flame Retardant used passes the third-party test, has low VOC, no heavy metals, and no SVHC report, it can be recognized that it has basically complied with the current mainstream environmental protection requirements.
To sum up, Halogen Free Flame Retardant is less environmentally harmful than halogen-containing substances, and complies with international environmental protection regulations such as RoHS and REACH. However, we should always pay attention to changes in regulations and strictly review product test reports to ensure their continued legal compliance and not to act outside the rules, in order to be on the right path and benefit the present and future generations.
Halogen Free Flame Retardant (Halogen Free Flame Retardant) was developed in response to the new regulations and is suitable for Rigid PU Foam (rigid polyurethane foam). Its main ingredients are phosphorus, nitrogen or inorganic materials, and it does not release halogens during combustion, resulting in a significant reduction in flue gas toxicity. After some products have been certified, such as UL 94 V-0, RoHS compliance, and REACH registration, they can all be identified. These types of flame retardants not only avoid the environmental risks of halogen, but also meet the requirements of SVHC substances of high concern. In recent years, Green Building international certifications such as LEED and BREEAM also require low toxicity and low emissions, so the application of halogen-free flame retardants is more and more extensive.
However, the specifications are changing with each passing day, and the specific formula and dosage must be carefully examined, taking into account new restriction items such as PFAS, so that it can be said to be complete. Some regions have begun to prudently evaluate certain organophosphorus and phosphine substances, and require enterprises to declare in a timely manner. If the finished product is certified by CB, CE, UL or domestic green products, it can be confirmed that its environmental compliance can be confirmed. If the Halogen Free Flame Retardant used passes the third-party test, has low VOC, no heavy metals, and no SVHC report, it can be recognized that it has basically complied with the current mainstream environmental protection requirements.
To sum up, Halogen Free Flame Retardant is less environmentally harmful than halogen-containing substances, and complies with international environmental protection regulations such as RoHS and REACH. However, we should always pay attention to changes in regulations and strictly review product test reports to ensure their continued legal compliance and not to act outside the rules, in order to be on the right path and benefit the present and future generations.
