Magnesium Hydroxide Manufacturers Detail Different Applications of Various Magnesium Hydroxide
There are various classifications of magnesium hydroxide products. From the application can be divided into and grade, flame retardant grade, electronic grade. Medical, oil additives, etc.; from the structure can be divided into flake, whisker, ultrafine, heavy, nano-scale and so on.
There are various classifications of magnesium hydroxide products. From the application can be divided into and grade, flame retardant grade, electronic grade. Medical, oil additives, etc.; from the structure can be divided into flake, whisker, ultrafine, heavy, nano-scale and so on. among them,Magnesium hydroxideThe development potential of whiskers and ultrafine magnesium hydroxide is better.
Ultrafine magnesium hydroxide
Ultrafine magnesium hydroxide can be used as a flame retardant component of composite materials, and the particle size of the product can be changed by adding different surface modifiers. The magnesium chloride solution as raw material, ammonia as precipitating agent, product particle size <400nm; adding self-made surface modifier, particle size of 150nm; using magnesium sulfate solution as raw material, adding self-made surface modifier, particle size of 380nm; using polyethylene glycol, particle size of 89.5nm.
The above magnesium salt solution can be prepared by acid leaching of magnesium-containing minerals after acid hydrolysis or calcination. Wherein, brine can be used instead of magnesium chloride solution.
flake magnesium hydroxide
The flaky magnesium hydroxide can be used as an additive type flame retardant. The dolomite or magnesite as raw materials, using carbonization method, after calcination, digestion, impurity removal, carbonization, precipitation to generate products.
Using dolomite as raw material, ammonia water as precipitant and adding surface modifier cetyl ammonium bromide, magnesium hydroxide in rhombohedral layer was prepared by hydrothermal method. The separation degree of magnesium and calcium was high, the extraction rate of magnesium was 90.02, and the product yield was 88.21. The product was prepared by calcining, leaching, impurity removal and precipitation with magnesite or dolomite as raw material.
The dolomite as raw material, successively with hydrochloric acid and sulfuric acid leaching, adding self-made complex precipitant and surface modifier polyethylene glycol to produce products, the yield is 85.20%. The acid hydrolysis method uses a variety of magnesium-containing minerals as raw materials, and produces products through acid hydrolysis, impurity removal and precipitation.
The dolomite as raw material, through hydrochloric acid acidification, impurity removal, with dolomite lime milk as precipitant, product purity is 98%. Wherein, dolomite lime milk is prepared by calcining and digesting dolomite.
magnesium hydroxide whisker
Magnesium hydroxide whiskers are short fiber functional materials, which are mainly added to polymer materials as flame retardants and reinforcing materials. precipitation method, improving the precipitation process can change the aspect ratio.
Magnesium chloride solution as raw material, adding alkali and surface modifier, hydrothermal synthesis products. The precipitating agent uses sodium hydroxide and glycerol as the surface modifier, and the length is 80~110 μm and the diameter is 0.1~0.3 μm by microwave hydrothermal. The precipitating agent uses ammonia water and sodium hydroxide instead, and acrylic acid is the surface modifier, with the length of 50 ~ 150nm and the diameter of 8 ~ 15nm. The dispersion of the product is better with medium and low concentration ammonia water and low concentration magnesium chloride solution.
Magnesium hydroxide with a length of 100~200 μm and a diameter of 1~2 μm was prepared by hydrothermal method using basic magnesium sulfate whisker as precursor, sodium hydroxide as precipitating agent and potassium oleate as surface modifier. The addition of surface modifier will not reduce the particle size, but will prevent the conversion of basic magnesium sulfate whiskers to magnesium hydroxide whiskers.
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Everyone knows that there are two common flame retardants. Today we are going to talk about only one of them. Aluminum hydroxide flame retardant is an environmentally friendly halogen-free flame retardant, which can be widely used in fabrics, wood, plastics, and rubber., Polyurethane and other industries have ideal flame retardant effect. In the process of industrial application, it is found that flame retardant failure occurs when aluminum hydroxide flame retardant is added. The following are the reasons for the failure of aluminum hydroxide flame retardant, how to prevent it, how to deal with the operation, and restore the original function.
As a flame retardant, magnesium hydroxide also need to improve what aspects?
When it comes to flame retardants, everyone is familiar with them. Although we usually have less contact with them, we can know what they are used for from the name. Have to talk about magnesium hydroxide, we all know that its main presentation state is a granular, at present, the market sales of magnesium hydroxide particle size is larger, part of the commodity particle size up to tens of microns, immediately used as a flame retardant, poor dispersion, the physical properties of raw materials greater harm. In industrial production, physical grinding methods are generally used to reduce the particle size to 1 micron. The surface of magnesium hydroxide has high polarity and is easy to agglomerate. As the compatibility of refractory materials and polymer substrates, it not only reduces its flame retardant grade, but also causes more serious harm to the physical properties of raw materials.
Hefei Zhongke Flame Retardant New Material Co., Ltd
Sales Department Telephone:15905609730
Ministry of Foreign Trade Telephone:13956052398
Comprehensive department Telephone:0551-67712199
Company headquarters address: Hefei Feidong Economic Development Zone Xianghe Road 36
E-mail:hefei@zkxcl.com
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