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Preparation method for nanometer modified magnesium hydroxide

A magnesium hydroxide, nano-scale technology, applied in dyeing organosilicon compound treatment, dyeing low-molecular organic compound treatment, dyeing physical treatment, etc., can solve the uniformity of particle size and shape distribution, lengthy process, environmental pollution and other problems, to achieve the effect of narrow product particle size distribution, easy process conditions, and reduced process steps

Active Publication Date: 2014-09-10
SUZHOU BAO SHUN MEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The uniformity of particle size and morphology distribution is affected due to the lack of a mechanism to quickly mix the two reaction solutions uniformly on the spinning disk
[0014] These methods have the problems of long process, high cost, low yield, difficulty in industrial scale production, large particle size and wide shape distribution, low product quality, and serious environmental pollution in the production process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the above method, get 10 kg of 325 mesh commercially available magnesium hydroxide powder, mix and stir with 3-triethoxysilyl-1-propylamine diluted with ethanol and 20 kg of deionized water with 800 g of 30% concentration into slurry. and the slurry was repeatedly flowed through to fill a 4.5 kg A horizontal sand mill with a 3L chamber capacity of 0.8mm alumina balls grinds at a speed of 2000 rpm, and the temperature of the material is controlled within the range of 40°C to 45°C during grinding. After grinding for 5 hours, take the slurry and dry it in an oven at 80°C for 48 hours to obtain superfine and modified magnesium hydroxide with an average particle size of 421 nanometers.

Embodiment 2

[0029] According to the above-mentioned method, get 5 kilograms of 800 order commercially available magnesium hydroxide powders, mix with 200 grams of 50% concentration of 3-triethoxysilyl-1-propylamine diluted with ethanol, 7 kilograms of deionized water, Stir into a slurry. and the slurry was repeatedly flowed through to fill the 5 kg A horizontal sand mill with a 3L chamber capacity of 0.4mm zirconia balls grinds at a speed of 3000 rpm, and the material temperature is controlled at 60-65°C during grinding. After grinding for 3 hours, take the slurry and dry it in an oven at 110° C. for 36 hours to obtain superfine and modified magnesium hydroxide with an average particle size of 260 nanometers.

Embodiment 3

[0031] According to the above method, take 500 grams of 2500 mesh commercially available magnesium hydroxide powder, mix with 17.5 grams of stearic acid and 1200 grams of ethanol, and stir to form a slurry. and the slurry was repeatedly flowed through to fill the 1.2 kg The test of 0.6L cavity capacity of 0.2mm zirconia grinding balls is ground with a sand mill at a speed of 3600 rpm, and the material temperature is controlled at 30°C to 35°C during grinding. After grinding for 10 hours, take the slurry and dry it with a vacuum microwave dryer at 46°C to obtain superfine, modified magnesium hydroxide with an average particle size of 61 nanometers.

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Abstract

The invention provides a preparation method for nanometer modified magnesium hydroxide. The objective of the invention is to provide the ultrafine magnesium hydroxide preparation method with the advantages of high yield, short process flow, no pollution during production, narrow particle size distribution and capacity of realizing ultra-refining and surface modification in one step. According to a technical scheme in the invention, the preparation method comprises the following steps: mixing, stirring and beating magnesium hydroxide powder with a particle size of 325 to 8000 meshes, a surface modifier and a solvent in a (weight) ratio of 1000: 1-80: 1000-5000; then allowing the obtained slurry to pass through grinding equipment, filling a grinding cavity with spherical medium grinding beads with a diameter of no more than 0.8 mm and carrying out grinding in an environment where a filling volume ratio is greater than 35% and the minimum movement speed of the grinding beads is greater than 10 m / s; and allowing the slurry obtained after grinding to pass through drying equipment so as to obtain surface-modified ultrafine magnesium hydroxide powder with average particle size distribution in a range of 50 to 500 nm.

Description

technical field [0001] The present invention relates to a preparation method of nano-scale modified magnesium hydroxide, more specifically the present invention relates to a preparation method of nano-scale modified superfine magnesium hydroxide which can be mainly used in the field of flame retardancy. Background technique [0002] As an inorganic, smoke-suppressing, non-toxic flame-retardant material, magnesium hydroxide powder is widely used in the field of flame-retardant polymers. Magnesium hydroxide is considered to be the most promising environment-friendly type due to its high thermal stability, high heat absorption, excellent smoke suppression ability and low hardness compared with the widely used aluminum hydroxide flame retardant material. Inorganic flame retardants have become a research hotspot in various countries in recent years. [0003] The rapid development of nanoscience and technology has greatly promoted the ultrafine research of magnesium hydroxide fla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/02C09C3/12C09C3/08C09C3/04
Inventor 瞿海锋
Owner SUZHOU BAO SHUN MEI TECH CO LTD
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