Method for synthesizing flame retardant of magnesium hydroxide

A technology of magnesium hydroxide and a synthesis method, applied in directions such as magnesium hydroxide, can solve the problems of difficult particle size control, coarse particle size of magnesium hydroxide and the like

Active Publication Date: 2007-12-26
GUIZHOU BRANCH CHINA ALUMINUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The relevant patents CN01134059.2, CN200410067540.8, 03134189.6 and 02133360.2 were consulted. The conventional precipitation method and natural brucite

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] First prepare an aqueous solution of magnesium sulfate with a concentration of 8g / L, take 200mL in a polytetrafluoroethylene cup, add the same volume of 10g / L aqueous sodium hydroxide solution, and 10mL of 0.5g / L sulfonated glutarate, After stirring, quickly place it in a microwave reactor, control the power of the reactor to 200W, and the reaction time is 15min, then cool, filter, wash twice with deionized water, dry in vacuum at 105°C for 2 hours, and observe by SEM to obtain The particle diameter of the magnesium particles was 2 μm.

Embodiment 2

[0012] First prepare a magnesium sulfate aqueous solution with a concentration of 20g / L, take 200mL in a polytetrafluoroethylene cup, add the same volume of 25g / L sodium hydroxide aqueous solution, and 10mL 0.5g / L sulfonated glutarate, stir Then put it in a microwave reactor quickly, control the power of the reactor to 500W, and the reaction time is 20min, then cool, filter, wash twice with deionized water, dry in vacuum at 105°C for 2 hours, observe by SEM, and obtain magnesium hydroxide The particle diameter of the particles was 1 μm.

Embodiment 3

[0014] First prepare a magnesium sulfate aqueous solution with a concentration of 35g / L, take 200mL in a polytetrafluoroethylene cup, add the same volume of 40g / L sodium hydroxide aqueous solution, and 10mL 1g / L sulfonated glutarate, after stirring Quickly place it in a microwave reactor, control the power of the reactor to 700W, and the reaction time is 40min, then cool, filter, wash twice with deionized water, dry in vacuum at 105°C for 2 hours, observe by SEM, and obtain magnesium hydroxide particles The particle size is 0.2 μm.

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Abstract

This invention relates to a method for synthesizing Mg (OH) 2 flame retardant, more specifically, a precipitation method for synthesizing ultrafine Mg (OH) 2 flame retardant. The method comprises: preparing a mixed aqueous solution of MgSO4 (4-18 g/L), NaOH (5-20 g/L) and sulfonated glutarate modifier (0.01-0.03 g/L), and precipitating under microwave to obtain Mg (OH) 2. The particle sizes of Mg (OH) 2 can be decreased by microwave. Different particle sizes (0.1-3 mu.m) of Mg (OH) 2 can be obtained by adjusting the microwave power and time. At the same time, the addition of sulfonated glutarate anionic surfactant can improve the flame retardancy of Mg (OH) 2 flame retardant.

Description

technical field [0001] The invention relates to a method for synthesizing a magnesium hydroxide flame retardant, in particular to a method for synthesizing an ultrafine magnesium hydroxide flame retardant by a precipitation method. Background technique [0002] Magnesium hydroxide is a widely used flame retardant, mainly used in construction, transportation, transportation, electronic appliances, chemical industry and other fields. The relevant patents CN01134059.2, CN200410067540.8, 03134189.6 and 02133360.2 were consulted. The conventional precipitation method and natural brucite were mainly used. The particle size of the produced magnesium hydroxide was relatively coarse, and the particle size was not easy to control. Contents of the invention [0003] The object of the invention is to aim at the deficiencies in the above-mentioned prior art, and provide a kind of magnesium hydroxide particle size that produces is fine, the synthetic method of the magnesium hydroxide fl...

Claims

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Application Information

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IPC IPC(8): C01F5/22C09K21/02
Inventor 仓向辉张树朝楮丙武
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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