Wet-process method of preparing modified micron/nano-magnesium hydroxide flame retardant

A technology of magnesium hydroxide and ultra-fine magnesium hydroxide, which is applied in chemical instruments and methods, dyeing organosilicon compound treatment, dyeing low molecular organic compound treatment, etc. problems such as rise, to achieve good coating modification effect, reduce viscosity, and promote the effect of dispersion

Inactive Publication Date: 2018-08-24
大连亚泰科技新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the powder is ultrafinely pulverized, the specific surface area increases, the surface energy increases, and the rearrangement of the surface molecules increases the gravitational force between the powder particles, and the particles are easily agglomerated. In this case, the surface modification is carried out , The powder has a strong tendency to agglomerate. This secondary agglomeration makes the particles that have been crushed to fine particles reunite into larger particles.

Method used

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  • Wet-process method of preparing modified micron/nano-magnesium hydroxide flame retardant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) First, 1 part of monoethanolamine solution, 70 parts of water, and 15 parts of 325-mesh brucite powder raw materials are added to a primary wet grinder, and grinding balls are added to grind until the particle size is 2μm ultrafine magnesium hydroxide, the temperature is controlled at 100°C, the time of this stage is 60min, and the speed of the stirring mill is controlled at 60 rpm;

[0023] (2) Add the above-prepared ultrafine magnesium hydroxide suspension and 0.1 part of hyperdispersant to a secondary wet grinder, and add grinding beads for grinding, and grind to the target particle size of micronano hydroxide Magnesium slurry, the temperature is controlled at 100°C, the time at this stage is 100min, and the speed of the stirring mill is controlled at 60 rpm;

[0024] (3) adding the above-mentioned micro-nano magnesium hydroxide slurry and 0.2 part of composite modifier into the modification machine for modification to obtain the modified micro-nano magnesium hyd...

Embodiment 2

[0027] (1) First add 1.5 parts of diethanolamine solution, 80 parts of water, and 16 parts of 325-mesh brucite powder raw materials into a primary wet grinder, and add grinding media balls for grinding until the particle size It is 2 μm ultrafine magnesium hydroxide, the temperature is controlled at 90°C, the time of this stage is 100min, and the speed of the stirring mill is controlled at 100 rpm;

[0028] (2) Add the above-prepared ultrafine magnesium hydroxide suspension and 0.1 part of hyperdispersant to a secondary wet grinder, and add grinding beads for grinding, and grind to the target particle size of micronano hydroxide Magnesium slurry, the temperature is controlled at 100°C, the time of this stage is 60min, and the speed of the stirring mill is controlled at 60 rpm;

[0029] (3) adding the composite modifying agent in the above-mentioned micronano magnesium hydroxide slurry and 0.5 part to modify in the modifying machine, obtain the modified micronano magnesium hydr...

Embodiment 3

[0032] (1) First add 2 parts of diethanolamine solution, 100 parts of water, and 20 parts of 325-mesh brucite powder raw materials into a primary wet grinder, and add grinding media balls for grinding until the particle size It is 2 μm ultrafine magnesium hydroxide, the temperature is controlled at 120°C, the time of this stage is 75min, and the speed of the stirring mill is controlled at 100 rpm;

[0033] (2) Add the above-prepared ultrafine magnesium hydroxide suspension and 0.1 part of hyperdispersant to a secondary wet grinder, and add grinding beads for grinding, and grind to the target particle size of micronano hydroxide Magnesium slurry, the temperature is controlled at 100°C, the time of this stage is 60min, and the speed of the stirring mill is controlled at 60 rpm;

[0034] (3) adding the composite modifying agent in the above-mentioned micronano magnesium hydroxide slurry and 0.5 part to modify in the modifying machine, obtain the modified micronano magnesium hydro...

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Abstract

The invention relates to a wet-process method of preparing a modified micron / nano-magnesium hydroxide flame retardant and belongs to the fields of non-metal mineral processing and environment-friendlymaterials. By means of a horizontal ball mill, a powder is subjected to impact, friction and shear in a cylinder body, which rotates at high frequency, with a milling medium, in order to complete ultrafine milling and surface modification to the powder; during the ball milling process, a milling additive is added to regulate the rheological properties of the ore slurry and surface electrical behavior of mineral granules so as to reduce the viscosity of the ore slurry and accelerate dispersion of the granules; meanwhile, a surfactant is added to perform surface modification to the powder, thusavoiding secondary aggregation of the powder. The method has reasonable processes and can effectively control the particle size of the powder, can reach micron / nano-scale and is high in fineness. Theproduct is concentrated in particle size distribution and is round and smooth in particle appearance, has good cladding modification effect and can satisfy use demands on flame retardants; especially, use demands with large addition quantity.

Description

technical field [0001] The invention relates to a wet method for preparing a modified micro-nano magnesium hydroxide flame retardant, which belongs to the field of non-metallic mineral processing and the field of environment-friendly materials. Background technique [0002] Existing methods for preparing magnesium hydroxide flame retardant mainly include chemical method and physical method. , The production process of this method is complicated, the cost is high, the raw materials are not easy to obtain, and the industrial application is limited; the physical method is obtained through physical deep processing of the natural mineral brucite, mainly physical pulverization. Physical pulverization can be roughly divided into dry type and wet type. The dry method does not require drying and is suitable for products with an average particle size of 5 μm or more. However, this method has high requirements on the grade of the mineral itself, and it is difficult to produce products ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/04C09C3/12C09C3/08C09C3/06C09C3/10C08K9/06C08K3/22
CPCC01P2004/60C01P2006/22C01P2006/37C08K3/22C08K9/06C08K2003/2224C08K2201/011C09C1/028C09C3/006C09C3/041C09C3/063C09C3/08C09C3/10C09C3/12
Inventor 孙忠祥
Owner 大连亚泰科技新材料股份有限公司
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