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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

Inactive Publication Date: 2017-12-29
HUZHOU TORRENSIL NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the commonly used magnesium hydroxide flame retardants are hexagonal flakes. With the continuous development of flame retardant related application fields, ordinary hexagonal flake magnesium hydroxide flame retardants can no longer meet the needs of industrial production.

Method used

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  • Preparation method of magnesium hydroxide flame retardant

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Effect test

Embodiment 1

[0027] A preparation method of magnesium hydroxide flame retardant of the present invention, comprises the following steps:

[0028] (1) adding magnesium sulfate to water, be mixed with the magnesium sulfate solution that concentration is 0.8mol / L;

[0029] (2) Add acetone to 1,7,7-trimethylbicyclo[2,2,1]heptan-2-one to prepare a mixed solution I with a concentration of 400g / L;

[0030] (3) Add the mixed solution I obtained in step (2) into the magnesium sulfate solution obtained in step (1), stir and disperse to form mixed solution II, in which 1,7,7-trimethylbicyclo[2 ,2,1] the concentration of heptan-2-one is 20g / L;

[0031] (4) adding sodium hydroxide to the mixed solution II obtained in step (3) as a precipitating agent, carrying out a precipitation reaction to form a slurry, the molar ratio of magnesium ions and hydroxide ions in the slurry is 1:2;

[0032] (5) Aging the slurry obtained in step (4), the aging time is 3h, then filtering, washing the filter cake with abs...

Embodiment 2

[0037] A preparation method of magnesium hydroxide flame retardant of the present invention, comprises the following steps:

[0038] (1) adding magnesium sulfate to water, be mixed with the magnesium sulfate solution that concentration is 0.9mol / L;

[0039] (2) Add acetone to 1,7,7-trimethylbicyclo[2,2,1]heptan-2-one to prepare a mixed solution I with a concentration of 440g / L;

[0040] (3) Add the mixed solution I obtained in step (2) into the magnesium sulfate solution obtained in step (1), stir and disperse to form mixed solution II, in which 1,7,7-trimethylbicyclo[2 ,2,1] the concentration of heptan-2-one is 22g / L;

[0041] (4) adding sodium hydroxide to the mixed solution II obtained in step (3) as a precipitating agent, carrying out a precipitation reaction to form a slurry, the molar ratio of magnesium ions and hydroxide ions in the slurry is 1:2.1;

[0042] (5) Aging the slurry obtained in step (4), the aging time is 3.5h, then filtering, washing the filter cake with...

Embodiment 3

[0047] A preparation method of magnesium hydroxide flame retardant of the present invention, comprises the following steps:

[0048] (1) adding magnesium sulfate to water, be mixed with the magnesium sulfate solution that concentration is 1.0mol / L;

[0049] (2) Add acetone to 1,7,7-trimethylbicyclo[2,2,1]heptan-2-one to prepare a mixed solution I with a concentration of 480g / L;

[0050] (3) Add the mixed solution I obtained in step (2) into the magnesium sulfate solution obtained in step (1), stir and disperse to form mixed solution II, in which 1,7,7-trimethylbicyclo[2 ,2,1] the concentration of heptan-2-one is 25g / L;

[0051] (4) adding sodium hydroxide to the mixed solution II obtained in step (3) as a precipitating agent, carrying out a precipitation reaction to form a slurry, the molar ratio of magnesium ions and hydroxide ions in the slurry is 1:2.1;

[0052] (5) Aging the slurry obtained in step (4), the aging time is 4h, then filtering, washing the filter cake with a...

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Abstract

The invention discloses a preparation method of a magnesium hydroxide flame retardant. The preparation method comprises the following steps: preparing a magnesium salt solution; adding a dispersing agent into 1,7,7-trimethylbicyclo[2,2,1]heptane-2-one to obtain mixed liquid I; adding the mixed liquid I into the magnesium salt solution to obtain mixed liquid II; adding a precipitating agent into the mixed liquid II to obtain slurry; aging, filtering, washing and drying the slurry to obtain magnesium hydroxide particles; dissolving a silane coupling agent into petroleum ether or water to obtain a coupling agent solution; adding stearic acid, an acrylic monomer, lauric acid and a catalyst into water or ethanol to obtain mixed liquid III; putting the magnesium hydroxide particles into a high speed mixer, adding the coupling agent solution for carrying out a reaction, then adding the mixed liquid III for carrying out a reaction, and drying the obtained material so as to obtain the magnesium hydroxide flame retardant. The preparation method is simple in technology; the obtained magnesium hydroxide flame retardant is hollow spherical and has good dispersity, compatibility and flame-retardant effect in a base material.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to a preparation method of magnesium hydroxide flame retardants. Background technique [0002] Magnesium hydroxide is a new type of inorganic additive environmentally friendly flame retardant. It has easy-to-obtain raw materials, no harmful substance emissions during its production, use and disposal, good thermal stability, non-volatility, no precipitation, and no toxic gases. , Smoke elimination effect is obvious and so on. Magnesium hydroxide can be used as a high-performance inorganic flame retardant in high-molecular polymer materials to enhance the flame-retardant properties of high-molecular polymer materials. However, the surface of its powder particles has strong polarity, and its dispersibility in most hydrocarbon polymers is poor, and when the addition amount is slightly larger, the mechanical properties of the polymer polymer material will be reduced. Therefore...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08K9/06C08K7/24C08K5/20C08L55/02
CPCC08K9/04C08K5/20C08K7/24C08K9/06C08K9/08C08L2201/02C08L55/02
Inventor 陈安
Owner HUZHOU TORRENSIL NEW MATERIAL
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