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Superfine Magnesium hydroxide powder, its preparing process and is combustible resin composition

A technology of ultra-fine powder and magnesium hydroxide, applied in the direction of magnesium hydroxide, dyeing physical treatment, fibrous fillers, etc., can solve the problems of unobtained test results, etc., and achieve the effect of inhibiting the increase of slurry viscosity and improving the dispersion performance

Inactive Publication Date: 2002-07-03
AJINOMOTO CO INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the above problems, the combination of surface treatment agents has been tried using traditional technology, but no satisfactory test results have been obtained.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] With the coarse pulverization thing (average particle diameter is about 0.1mm) of the natural brucite of 100 parts by weight, the commercially available polycarboxylate type dispersant of 2 parts by weight (trade name " MAITI150 ", Japanese Kao Co., Ltd. product), 2 parts by weight The sodium octadecanoate of weight part (extra-grade, Japan Chunzheng Co., Ltd. product) and the water of 100 weight parts are put into ball mill, under the presence of the alumina medium that the particle diameter of 100 weight parts is 5mm, carry out the wet pulverization of 6 hours . The obtained slurry has fluidity, and after filtering and separating the solid part, it is dried at a temperature of 120° C. for 2 hours to obtain filter cake-like magnesium hydroxide 1 . The dried filter cake is very fragile and can be crushed into a fine powder with a spatula or the like. The powder is hydrophobic and can float in water. Adopt laser diffraction particle size distribution tester to test its ...

Embodiment 2

[0038] The coarse pulverization (average particle diameter is about 0.1mm) of the natural brucite of 100 parts by weight, the commercially available polycarboxylate type dispersant of 2 parts by weight (trade name " MAITI3000 ", Japanese Kao Co., Ltd. product), 2 parts by weight The sodium oleate of weight part (extra grade, Japanese Chunzheng Co., Ltd. product) and the water of 100 weight parts are put into ball mill, under the presence of the alumina medium that the particle diameter of 100 weight parts is 5mm, carry out the wet pulverization of 6 small advances. The obtained slurry has fluidity, and after filtering and separating the solid part, it is dried at a temperature of 120° C. for 2 hours to obtain filter cake-shaped magnesium hydroxide 2 . The dried filter cake is very fragile and can be crushed into a fine powder with a spatula or the like. The powder is hydrophobic and can float in water. Adopt laser diffraction particle size distribution tester to test its parti...

Embodiment 3

[0039] With 100 parts by weight of lightly burned magnesium hydroxide coarse pulverization (average particle diameter is about 0.1 mm), 2 parts by weight of commercially available polycarboxylic acid type dispersant (trade name "POIZ535", Japan Kao Co., Ltd. product), 2 parts by weight The sodium octadecanoate of weight part (extra-grade, Japan Chunzheng Co., Ltd. product) and the water of 100 weight parts are put into ball mill, under the presence of the alumina medium that the particle diameter of 100 weight parts is 5mm, carry out the wet pulverization of 6 hours . After pulverizing for 2 hours, 2 parts by weight of the polycarboxylic acid type dispersant was added, and after pulverizing for 4 hours, 2 parts by weight of sodium oleate was added. After the obtained slurry was filtered to separate the solid part, it was dried at 120° C. for 2 hours to obtain filter cake-like magnesium hydroxide 3 . The dried filter cake is very fragile and can be crushed into a fine powder w...

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Abstract

To inexpensively provide magnesium hydroxide superior in a physical property, appearance when finely dispersed in a resin and being low cost by inhibiting the increase of slurry viscosity in wet pulverization, secondary coagulation and sticking in drying and by hydrophobicity treatment on the surface of the particle of the above hydroxide at the same time. SOLUTION: Natural brucite and / or calcined magnesia of 100 pts.wt. is mixed with a polycarboxylic acid-based dispersing agent of 0.01-20 pts.wt., a fatty acid metal salt of 0.01-20 pts.wt. and water of 10-1,000 pts.wt. The fine magnesium hydroxide powder of which the mean particle diameter is 10 micron or less is manufactured by the wet pulverization. The fine powder is mixed in a thermoplastic resin compound as a fire-resistant agent and / or a fire-resistant auxiliary agent.

Description

technical field [0001] The invention relates to superfine magnesium hydroxide powder using natural ore as a raw material, a preparation method thereof, and a halogen-free thermoplastic flame-retardant resin composition with low cost and excellent performance, which can be widely used in various fields requiring flame-retardant materials. Background technique [0002] Generally speaking, in the preparation of thermoplastic flame retardant resins, the traditional method is to add flame retardants or flame retardant additives such as halogen compounds, phosphorus compounds, antimony trioxide or magnesium hydroxide, especially recently, in order to adapt to environmental protection Hydroxides such as magnesium hydroxide and aluminum hydroxide have attracted widespread attention because they rarely produce dioxins when incinerated and do not produce toxic gases such as hydrogen halides when burned. Hydroxide will thermally decompose when heated, absorb heat and release water. It ...

Claims

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Application Information

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IPC IPC(8): C01F5/14C08K3/22C08L23/00C08L101/00C09C1/02C09C3/04C09K21/02
Inventor 安田直树
Owner AJINOMOTO CO INC
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