When chemical magnesium hydroxide is compounded with aluminum hydroxide, a complementary flame retardant system can be formed. Both hydroxides have the characteristics of absorbing heat when decomposed by heat, releasing water vapor to cool down, but chemical magnesium hydroxide has a higher decomposition temperature, while aluminum hydroxide works in the medium and low temperature range. When they are mixed in a certain proportion, they can continuously suppress combustion in a wide temperature range, which not only avoids the problem of insufficient protection in the low temperature section when chemical magnesium hydroxide is used alone, but also makes up for the defect that aluminum hydroxide has a reduced flame retardant effect at high temperatures. This combination can effectively protect the material at different combustion stages, significantly improve the overall flame retardant performance, while reducing the amount of a single flame retardant and reducing the impact on the mechanical properties of the material.
When used in combination with red phosphorus, chemical magnesium hydroxide can enhance the smoke suppression effect of the flame retardant system. Red phosphorus is a highly efficient flame retardant, but it is easy to produce toxic smoke when burned. The magnesium ions produced by the decomposition of chemical magnesium hydroxide can react with the acidic gases in the smoke to neutralize and adsorb them, reducing the emission of toxic gases. At the same time, the presence of red phosphorus can promote the faster decomposition of chemical magnesium hydroxide, release more water vapor to dilute the oxygen concentration, and the two cooperate with each other to enhance the flame retardant ability and reduce the smoke damage during the combustion process. This synergistic effect is widely used in polymer materials such as plastics and rubber, especially suitable for scenes with high environmental protection and safety requirements.
When chemical magnesium hydroxide is compounded with intumescent flame retardants, a more complete flame retardant barrier can be constructed. Intumescent flame retardants will form an intumescent carbon layer when heated to isolate heat and oxygen, while the magnesium oxide residue produced by the decomposition of chemical magnesium hydroxide can be filled in the carbon layer to enhance the density and strength of the carbon layer and prevent the carbon layer from breaking at high temperatures. At the same time, the water vapor released by chemical magnesium hydroxide can help the carbon layer expand more evenly and expand the coverage area. The composite barrier formed by the combined action of the two is more durable than the protection effect of using any single flame retardant, and can effectively slow down the burning speed of the material, buying more time for fire extinguishing.
When compounded with zinc compounds, chemical magnesium hydroxide shows unique advantages in the field of corrosion protection. In water treatment, the alkalinity of chemical magnesium hydroxide can adjust the pH value of water and inhibit the reproduction of microorganisms, while zinc ions can destroy bacterial cell membranes and enhance the bactericidal effect. After the two are compounded, they can not only improve the purification efficiency of water bodies, but also form a protective film on the inner wall of the pipe to reduce the erosion of the pipe by corrosive substances. This synergistic effect makes the function of water treatment agents more comprehensive, which not only solves the problem of water purification, but also prolongs the service life of transportation equipment, and is especially suitable for the maintenance of industrial circulating water systems.
When chemical magnesium hydroxide is compounded with silicate, it can improve the mechanical properties of the material. In rubber or plastic processing, chemical magnesium hydroxide can be used as a filler to improve the rigidity of the material, but excessive addition will cause the material to become brittle, while the addition of silicate can enhance the bonding force between particles and improve the toughness and impact resistance of the material. The composite filling system formed by the two substances can not only maintain the flame retardant and heat resistant properties of the material, but also avoid the decrease in mechanical properties caused by excessive fillers, so that the material can achieve a balance between functionality and practicality, and broaden its application range in construction, automobiles and other fields.
When compounded with boron compounds, the flame retardant and smoke suppression properties of chemical magnesium hydroxide will be doubly enhanced. Boron compounds can form a glassy covering layer at high temperatures to prevent combustibles from contacting oxygen, and the water vapor produced by the decomposition of chemical magnesium hydroxide can help the boron compounds to better diffuse and cover the surface of the material, forming a continuous and complete protective layer. At the same time, the boron element can inhibit the small amount of molten dripping that may be produced when chemical magnesium hydroxide burns, reducing the risk of secondary ignition. This synergistic effect allows the flame retardant system to improve in terms of inhibiting combustion, reducing smoke and preventing dripping, and is particularly suitable for materials that are prone to dripping, such as fabrics and cables.
When chemical magnesium hydroxide is compounded with organic acids, it can optimize the efficacy in the medical field. For example, chemical magnesium hydroxide can neutralize gastric acid as an antacid, but the action time is short. When compounded with organic acids such as citric acid, it can form a sustained-release system, prolong the time of neutralizing gastric acid, and reduce the number of medications. At the same time, organic acids can promote the absorption of magnesium ions, enhance the laxative effect of chemical magnesium hydroxide, and relieve constipation symptoms. This synergistic effect allows the drug to treat excessive gastric acid while regulating the digestive system, improving the comfort and effectiveness of the medication. It is especially suitable for patients who need to take antacid drugs for a long time.
