Flame Retardant for Unsaturated Polyester

Refractories, chemical products are also used to suppress fire and curb combustion.Flame Retardant for Unsaturated Polyester, If it is used in unsaturated polyesters, its main components are mostly different, but there are only a few common ones. One is halogen-containing compounds, especially bromine and chlorine, which are the most commonly used. Bromine-based substances, such as decabromodiphenyl ether, brominated styrene, brominated cyclopentadiene, etc., can decompose at high temperatures, release halogen ions, and intervene in the combustion reaction, so that the free radical reaction chain in the flame is cut off, so it can block the spread of fire. Chlorine compounds have similar effects, but their inhibitory power is slightly inferior to that of bromine, and they are mostly used as auxiliary agents. And phosphorus compounds, such as antimony trioxide synergistic application of organic phosphorus, or such as phosphate esters, ammonium polyphosphate, etc., can also be used. When these compounds burn, they can form a layer of carbon film, which blocks the infiltration of oxygen, and slows down the decomposition of polyester, making it difficult to increase combustion. Or internal cracking to form an expansive phase, a thick coating surface, which is extremely conducive to flame suppression. The wonderful use of both chemical and physical applications. In addition, the transplantation of inorganic refractories should not be ignored, with aluminum hydroxyl and magnesium hydroxyl as representatives. When it decomposes, it absorbs heat and releases water vapor, which can reduce the temperature of polyester and dilute flammable gases, thereby reducing the fire. Sometimes it is used with other refractories. Another example is silicon-based substances, hydroxides, and metal oxides, which also have their own functions, assisting the main agent and strengthening the fire resistance. Nowadays, people take innovative ideas and adopt new nanomaterials, or use surface modification to enhance dispersion, so that polyester materials can not only self-inhibit combustion, but also not damage its functional properties. However, the choice of medication still needs to weigh the safety of the environment and health, and it is advisable to use materials cautiously to avoid damage. To sum up, unsaturated polyester refractories, or halogen, or phosphorus, or inorganic, or new composites, although their main components have different paths, they are all the same, and they all aim to prevent combustion and protect the people.

Flame Retardant for Unsaturated Polyester are an important additive component of unsaturated polyester resins and play a role in material processing and performance. The amount of its dosage varies depending on the nature of the resin, the use of the product and the type of flame retardant. Common flame retardants are divided into halogen, organophosphorus or inorganic filling types, but phosphorus, nitrogen, aluminum hydroxide and magnesium hydroxide are widely used. The specific gravity added is not uniform, and the chemical properties, compatibility and dispersion of different flame retardants are sufficient to affect the final performance. If aluminum hydroxide is used as an example, it is a non-flammable inorganic powder, and the common addition amount is between 30 and 60 mass percent of the total resin weight. However, if it is too much, it is easy to cause the mechanical properties of the product to decline, so it is necessary to weigh the trade-off between flame retardant efficiency and mechanical properties. Organophosphorus flame retardants, due to their active structure and good compatibility with polyester, are usually added in an amount of ten to twenty mass percent of the total weight. When practical, they must be adjusted flexibly according to various performance requirements. As for halogen flame retardants, although they have excellent flame retardant effects, due to environmental and health concerns, their application has been relatively restrained, but their dosage is usually about five to fifteen mass percent. If products need to meet high-grade flame retardant standards such as UL94 V-0, they must be used flexibly in accordance with international norms, combined with a variety of flame retardant systems, supplemented by synergy effects. If it is necessary to take into account transparency, electrical insulation and other special physical properties at the same time, the selection and addition amount of flame retardants must be considered. To sum up, the amount of flame retardant added to unsaturated polyester is not fixed, and it needs to be determined according to the specific flame retardant goals and product requirements. In the process, many factors such as dispersion uniformity, fluidity, subsequent processing and processing stability need to be considered before the ultimate product with excellent performance can be obtained. Experimental verification, gradual adjustment, and the best.

Flame Retardant for Unsaturated Polyester, which have a great impact on material properties. To explore its effect, the flame retardant must be empowered first. Flame retardants are integrated into the polyester system, and their chemical and physical properties are adjusted. First, its main function is to improve the flame retardant effect of materials, which can slow down the combustion speed and prolong the ignition time. It is often used in electrical shells, transportation equipment and building decoration fields with high requirements for flame retardancy. However, due to the addition of components, common flame retardants are mostly phosphorus-containing, nitrogen-containing or intumescent substances, which thermally decompose and release inert gases. During the decomposition or carbonization process, an isolation layer is formed, which inhibits the diffusion of combustion reactions, prevents oxygen from contacting the substrate, and plays an efficient flame retardant role. In addition, flame retardants can easily affect the mechanical properties of polyester foundations. If the dosage is too high, the stiffness and strength may decrease. If the particle size is coarse or uneven, it is easier to cause aggregation, resulting in increased brittleness of the material and weakened elongation at break. Unsaturated polyester is a thermosetting product. Flame retardants participate in polymerization and cross-linking, or cause the cross-linking density to decrease, and the hardness of the finished product is slightly reduced. In addition, some flame retardants are mainly additive and do not combine with the resin skeleton. In ancient times, materials were often migrated and precipitated, and white stains were easily oozed on the surface, which affected the appearance and service life of the product. Flame retardants often affect the performance of heat resistance and chemical corrosion resistance. Some flame retardants have insufficient heat resistance, low thermal decomposition temperature, easy to decompose early, and affect the thermal stability of the resin. Under harsh external environments, its resistance to chemical corrosion may also be damaged. If a suitable reactive flame retardant is selected, some drawbacks can be minimized, and the compatibility between the material and the flame retardant can be enhanced. It is easier to take into account the flame retardant effect and comprehensive performance. In short, flame retardants endow unsaturated polyester with fire resistance, but they also have a significant impact on its mechanical, thermal, chemical and other properties. It is appropriate for developers to weigh the material properties and flame retardant needs, and choose the appropriate variety and ratio to make the product performance and safety equally important.

The question is whether "Flame Retardant for Unsaturated Polyester" can meet the environmental protection standards. Today, I follow the ancient pen and deduce from the truth: Unsaturated polyester, chemically synthesized material, light and tough, commonly used in ships, building materials, automobiles and electrical appliances. Its spontaneous ignition point is low and flammable in case of fire, so flame retardants are often added to ensure safety. However, there are many kinds of flame retardants, including halogens, phosphorus, nitrogen and inorganic. Although halogen flame retardants can effectively suppress combustion, incineration often releases harmful gases, pollutes the atmosphere and damages the human body, so they are often banned or restricted in the world. Phosphorus-based, nitrogen-based, or replaced by inorganic materials, it is cleaner, the combustion product is simple, relatively harmless, and environmentally friendly. Looking around the world, European Union REACH, US-Canada RoHS, CHINA GB and other regulations all set limits on the content of harmful substances in chemical additives. Today's flame retardants, if they contain polybrominated biphenyls, polybrominated diphenyl ethers, etc., are strictly prohibited from being put into the market. If green halogen-free formulas, such as antimony trioxide, aluminum hydroxide, magnesium hydroxide, phosphate, ammonium polyphosphate, etc., are halogen-free, low-toxic, and do not cause harmful volatilization. Burn and do not produce dioxin, furan and other highly toxic substances. Where it meets the European Union ROHS and REACH standards, it is designated as environmentally friendly and usable. However, to evaluate the environmental protection of a flame retardant, it is necessary to consider its whole life cycle. From raw material collection, manufacturing, transportation, application, waste incineration, if its physical and chemical properties are stable, do not accumulate organisms, do not migrate into water and soil, and do not have volatile organic pollutants, heavy metals, carcinogens, etc., it can be said that it is green. In short, flame retardants used in unsaturated polyesters, if they are mainly halogen, will inevitably damage the ecology and are not environmentally friendly. If phosphorus, nitrogen or inorganic environmentally friendly flame retardants are used, and they pass authoritative testing and comply with regulations, they can be called environmentally friendly choices. When selecting flame retardants, it is advisable to review their chemical properties, compliance, and impact after application, and weigh safety and environmental protection. If the product used is marked "environmental protection passed", its test report should be carefully examined, and the certificate should be confirmed. Do not only believe the advertisement. In this way, it will not only ensure fire safety, but also protect the health of the people, in line with today's green development.

Flame Retardant for Unsaturated Polyester, and their chemical properties are changeable, and they are easily affected by temperature, humidity and light. The first way to store them is to choose a place to hide. It is best to avoid direct sunlight and place them in a cool and dry place to prevent high temperature volatilization or decomposition of components. The container must be airtight, and do not contact with air for a long time, causing moisture absorption and agglomeration. The receptacle used should be anti-corrosive, and should not be mixed with strong acids, strong alkalis and easily oxidized substances. During storage, regular inspections should be made to check for leakage, discoloration or other abnormalities. If there is any abnormality, it must be dealt with in time. Its transportation should be especially cautious. During the journey, it is necessary to prevent dumping, collision, and Rainproof and moisture-proof, avoid water and moisture, in case of water reaction or performance degradation. Ventilation and breathability, if necessary, install protective devices, or outer packaging reinforcement, to ensure that there is no risk of spillage on the way. When loading and unloading, the action should be light, so that the package is not damaged. If it is transported at night, lighting equipment must be prepared, and warning signs must be set up to warn that it is dangerous, so that drivers and operators can clearly detect and prevent misoperation. In the case of mixed loading, it is strictly forbidden to transport with food, feed and flammable and spontaneous combustible items in the same vehicle. In case of fire sources and electric sparks, be sure to keep away, and prepare fire-fighting equipment in the loading and unloading area. In case of leakage, it is necessary to cover it with sand immediately and clean it up quickly to prevent it from flowing into the sewer or Relevant personnel are advised to wear protective gloves and face masks to prevent direct contact to ensure physical well-being. Record the details of storage and transportation, and register in a special register. If the batch is large, it must be warehoused in batches for review and must not be negligent. Prevention first, stability first, is the essence of safety. In this way, the storage and transportation of flame retardants can be free of future problems, and the application of unsaturated polyester can also be durable and safe.