Preparation method of magnesium hydroxide flame retardant
A magnesium hydroxide and flame retardant technology, applied in the field of flame retardants, can solve problems such as inability to meet industrial production needs, and achieve good industrial application prospects, good dispersion and compatibility, and qualified flame retardant performance
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[0026] Example 1:
[0027] A preparation method of the magnesium hydroxide flame retardant of the present invention includes the following steps:
[0028] (1) Add magnesium sulfate to the water to prepare a magnesium sulfate solution with a concentration of 0.8 mol / L;
[0029] (2) Add acetone to 1,7,7-trimethylbicyclo[2,2,1]heptan-2-one to prepare mixture I with a concentration of 400g / L;
[0030] (3) Add the mixed solution I obtained in step (2) to the magnesium sulfate solution obtained in step (1), stir and disperse to form a mixed solution II in which 1,7,7-trimethylbicyclo[2 ,2,1]Heptan-2-one concentration is 20g / L;
[0031] (4) Add sodium hydroxide as a precipitant to the mixed solution II obtained in step (3) to perform a precipitation reaction to form a slurry. The molar ratio of magnesium ions and hydroxide ions in the slurry is 1:2;
[0032] (5) The slurry obtained in step (4) is aged for 3 hours, and then filtered, the filter cake is washed with absolute ethanol, and the wash...
Example Embodiment
[0036] Example 2:
[0037] A preparation method of the magnesium hydroxide flame retardant of the present invention includes the following steps:
[0038] (1) Add magnesium sulfate to the water to prepare a magnesium sulfate solution with a concentration of 0.9 mol / L;
[0039] (2) Add acetone to 1,7,7-trimethylbicyclo[2,2,1]heptan-2-one to prepare mixed solution I with a concentration of 440g / L;
[0040] (3) Add the mixed solution I obtained in step (2) to the magnesium sulfate solution obtained in step (1), stir and disperse to form a mixed solution II in which 1,7,7-trimethylbicyclo[2 ,2,1]Heptan-2-one concentration is 22g / L;
[0041] (4) Add sodium hydroxide as a precipitant to the mixed solution II obtained in step (3) to perform a precipitation reaction to form a slurry, and the molar ratio of magnesium ions to hydroxide ions in the slurry is 1:2.1;
[0042] (5) The slurry obtained in step (4) is aged for 3.5 hours, and then filtered, the filter cake is washed with absolute ethanol...
Example Embodiment
[0046] Example 3:
[0047] A preparation method of the magnesium hydroxide flame retardant of the present invention includes the following steps:
[0048] (1) Add magnesium sulfate to the water to prepare a magnesium sulfate solution with a concentration of 1.0mol / L;
[0049] (2) Add acetone to 1,7,7-trimethylbicyclo[2,2,1]heptan-2-one to prepare mixed solution I with a concentration of 480g / L;
[0050] (3) Add the mixed solution I obtained in step (2) to the magnesium sulfate solution obtained in step (1), stir and disperse to form a mixed solution II in which 1,7,7-trimethylbicyclo[2 ,2,1]Heptan-2-one concentration is 25g / L;
[0051] (4) Add sodium hydroxide as a precipitant to the mixed solution II obtained in step (3) to perform a precipitation reaction to form a slurry, and the molar ratio of magnesium ions to hydroxide ions in the slurry is 1:2.1;
[0052] (5) The slurry obtained in step (4) was aged for 4 hours, and then filtered, the filter cake was washed with absolute ethanol,...
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