A novel compound and an application thereof as a flame retardant
A compound, magnesium hydroxide technology, applied in the field of new compounds, can solve problems such as a large amount of smoke, poor flame retardant effect, human health and environmental hazards, and achieve good mechanical properties and good smoke suppression effects
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Embodiment 1
[0053] The preparation of embodiment 1 new compound
[0054] Add successively the PDD of 14.85g (0.05mol), the magnesium hydroxide of 5.83g (0.1mol) and the anhydrous aluminum chloride of 0.300g in the there-necked flask, then add 59.40g of anhydrous acetonitrile, gradually water-bath heating to After 24 hours of constant temperature reaction at 85°C, the reaction solution was cooled to room temperature, filtered with suction, and the filter cake was washed twice with an appropriate amount of acetonitrile, then washed twice with acetone, and then the filtered product was dried at 60°C for two hours to obtain a white Solid 12.61 g, yield 74.2%.
[0055] During the reaction, use 1 L of sodium hydroxide solution with a concentration of 0.5 mol / L to collect the gas generated, and through titration analysis, it was found that the concentration of the sodium hydroxide solution after the reaction ended became 0.4 mol / L, and finally determined that the reaction produced 0.1 mol of hy...
Embodiment 2
[0057] The structural analysis of embodiment 2 new compounds
[0058] The inventor carried out infrared spectrum detection on the compound prepared according to the method described in Example 1, and the obtained spectrum is as attached figure 1 shown.
[0059] The inventor has carried out infrared spectrum detection respectively to two kinds of raw materials pentaerythritol diphosphate dichloride (PDD) and magnesium hydroxide used for synthesizing the compound described in the present invention, and the results are as attached figure 2 , attached image 3 shown.
[0060] After comparative analysis of the above-mentioned infrared spectrograms, the inventor believes that the infrared spectrum of the new compound is at 1465cm -1 、1230cm -1 、1126cm -1 、1022cm-1 、848cm -1 The same as the infrared spectrum absorption peak of PDD, indicating that the main structure of the bicyclic ring of PDD has not changed; the infrared spectrum of the new compound is at 3336cm -1 There i...
Embodiment 3
[0063] The application of embodiment 3 new compounds
[0064] The new compound prepared according to the method described in Example 1 is used for the flame retardancy of PE. When the dosage is 25% and the PE dosage is 75%, the oxygen index of PE reaches 28%, which meets the flame retardancy requirements of flame retardant materials. , and the amount of smoke is very small, and the material also has relatively good mechanical properties.
[0065] When using a halogenated flame retardant such as hexabromocyclododecane or hexabromobenzene, it must be used together with antimony trioxide, and the total amount of the two added is not less than 30%, so that the oxygen index of PE can reach 28%, but the material will release a lot of toxic and harmful smoke during the combustion process.
[0066] When phosphorus-based flame retardants such as coated red phosphorus are used, they must be used together with flame retardants such as magnesium hydroxide or aluminum hydroxide, and the t...
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