Magnesium hydroxide flame retardant

Magnesium hydroxide flame retardant

With the wide application of polymer composite materials, fire risk is becoming more and more obvious, and the development of flame retardant is inevitable. Flame retardant is a kind of accelerator which can improve combustible polymers, prevent the material from being ignited and inhibit the spread of flame.

The flame retardants can be divided into inorganic flame retardants and organic flame retardants according to the different components. The main products of organic flame retardant are halogen, phosphate and halogenated phosphate. Organic flame retardants have good flame retardancy, but they are gradually replaced by inorganic flame retardants because of their release of toxic gases. The main products of inorganic flame retardants are aluminum hydroxide, magnesium hydroxide and boric acid. The inorganic flame retardant is widely used in various flame retardant fields because it has the advantages of non-toxic, harmless, smokeless and halogen.

Nearly 20a's production of the world's flame retardants is increasing at a rate of 10% to 15% per year, and the use and demand of flame retardants are increasing year by year. The United States is the first country to use flame retardants, and is also the country that produces and USES the most flame retardants.

The consumption structure of flame retardant in China is very different from that of developed countries. The proportion of chlorinated flame retardants in China is quite large, and the proportion of inorganic flame retardants is relatively small. The proportion of chlorine flame retardants in the developed countries of the world is very low. The market share of inorganic flame retardants is more than 50%, mainly aluminum hydroxide and magnesium hydroxide. In 1998, our country fire retardant annual output has reached more than 70000 t, phosphorus-containing accounted for about 80% of flame retardant, inorganic system accounts for only about 17% of the flame retardants, with 1/2 of Sb2O3, and aluminum hydroxide, magnesium hydroxide is less than 10%.

Development direction of world flame retardants: 1) non-halogenation. Halogen flame retardants will continue to be used, but the product structure will be adjusted. As people attach great importance to environmental protection, the development of flame retardants of non-halogenous systems will become the development trend of flame retardants. 2) the ultrafine of flame retardants. Studies have shown that the particle size of flame retardant directly affect its performance of the filler material, particle size decreases, and when adding amount must be physical and mechanical properties of the products index increase, oxygen index rose, phenomenon of molten drops greatly reduce the particle size, has a great influence on its performance. Therefore, the superrefinement of particles has become one of the main development trends of inorganic flame retardants. 3) surface treatment of flame retardants. Inorganic flame retardants have strong polarity and hydrophilic properties and are not compatible with non-polar polymer materials. Therefore, inorganic flame retardants must be modified before they are added. 4) the synergistic effect of flame retardant system.



Isopropylphenyl Phosphate(IPPP65)

Traits: Colorless Or Light Yellow Transparent Liquid

Color: ≤50

Phosphorus Content: BY8.1%

Moisture: 0.1% MAX

Flash Point: 220 ℃ MIN

Density: (D20) 1.16

Free Phenol: ≤0.05%

Viscosity: (25 ° C, CP) 64-7

Acid Value: (MgKOH / G0.1 MAX

Refractive Index: R (N23) 1.546-1.555

Isopropylphenyl Phosphate(IPPP65) Uses:

Isopropylphenyl Phosphate, Flame Retardant IPPP65 Halogen-Free Phosphate Flame Retardant Plasticizer, Will Not Twice Pollute The Environment; In The Phosphate Ester Species Is A Viscosity, Phosphorus Content Is More Moderate A Model. This Product Is Colorless And Transparent, Good Compatibility, The Use Of Both Flame Retardant And Plasticizer, In The Flame Retardant And Plasticizer To Play A Balance Between The Role, But Also To Make The Processing Of The Same Material And Its Physical Properties.


In practical application, single flame retardant may have such or such defects, it is difficult to meet the rising and higher flame retardant requirements. Flame retardant synergistic technology is to make phosphate, halogen, nitrogen and inorganic flame retardants, performance is complementary, to reduce consumption, improve the flame retardant material performance, processing performance and physical and mechanical properties, etc.

As China's demand for flame retardants increases, the demand for non-toxic and smokeless magnesium hydroxide flame retardants is more urgent. China is also a great country of magnesium resources, with advantaged resource advantages and good market prospects. Therefore, we should strengthen the development and research of magnesium hydroxide flame retardant, improve the existing production process and scale production to promote the production and development of magnesium hydroxide flame retardant.

Using ammonia and brine to prepare magnesium hydroxide flame retardant, the effect of ammonia magnesium ratio and initial reaction temperature on the yield of magnesium hydroxide was determined, and the optimum preparation conditions were determined.

The author on the basis of predecessors' research of magnesium hydroxide prepared by using brine as raw materials adopt step, to a certain amount of brine added to 500 ml with three flask of agitator, the reactor in a water bath pot after constant temperature, add a certain amount of ammonia, reaction under atmospheric pressure for a period of time, after filtering, washing, drying, get the samples of magnesium hydroxide.

The concentration of Mg2+ in brine can be used to determine the total amount of Ca2+ and Mg2+ with a pH=10 alkaline buffer solution, with chromium black T as indicator and EDTA standard solution. In addition, an equal sample of sample plus NaOH adjustment solution makes the pH=12~ 13, and the Mg2+ generates Mg(OH)2 precipitation, adding calcium indicator a little, and the Ca2+ content of the brine is determined by EDTA. The total amount of Ca2 +, Mg2+ and Ca2+ are known to calculate the content of Mg2+ in brine.

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