Physical method for preparing low-smoke and halogen-free polyolefin flame retardant, aluminum hydroxide

A technology of aluminum hydroxide and physical method, applied in the field of polymer inorganic flame retardant material preparation, can solve the problems of serious sample agglomeration, harsh environment and high cost, and achieve the effects of uniform mixing and distribution, less energy consumption and simple steps.

Inactive Publication Date: 2017-11-28
JINGJIANG CHENYANG CHEM CO LTD
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Problems solved by technology

[0005] 3. Metal alkoxide method: under the action of an appropriate catalyst, isopropylaluminum is hydrolyzed in the H2O-NH3 system, and the resulting precipitate is filtered and dried to obtain aluminum hydroxide ultrafine particles. The disadvantage is that the sample is seriously agglomerated. Use The cost of organic raw materials is high
[0006] Aluminum hydroxide flame retardants manufactured by chemical methods are complex, polluting, harsh and costly. At present, some manufacturers use mechanical m

Method used

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Embodiment Construction

[0018] The present invention is further described below;

[0019] A method for physically preparing low-smoke halogen-free polyolefin flame retardant aluminum hydroxide is characterized in that it comprises the following steps:

[0020] Step ①: Prepare semi-finished aluminum hydroxide particle coarse powder; use a ball mill to mill the aluminum hydroxide particle with a mesh number of 50-80 mesh prepared by the Bayer method. The diameter of the ball is 1mm, 2mm, 5mm, 10mm, 20mm, The ratio is 30:20:20:15:15; the material of the grinding ball is α-type alumina, and the purity exceeds 99%; the semi-finished aluminum hydroxide particle coarse powder with irregular shape is obtained, and the diameter D50 of the semi-finished aluminum hydroxide particle is 2.4-3.0 um, D97 is 4.0-4.5um;

[0021] Step ②: Prepare aluminum hydroxide particle fine powder; use a gas pulverizer in a micro-vibration state to obtain regular-shaped spherical or three-dimensional elliptical aluminum hydroxide...

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Abstract

A physical method for preparing a low-smoke and halogen-free polyolefin flame retardant, aluminum hydroxide is characterized by comprising steps as follows: S1, preparation of a semi-finished product, namely, crude aluminum hydroxide granule powder; S2, preparation of fine aluminum hydroxide granule powder; S3, post-treatment. The steps are concise, the method is energy-saving and environment-friendly, obtained aluminum hydroxide granules are regular in shape and large in yield and are uniformly mixed and distributed, and the yield in every hour exceeds 500 kg.

Description

technical field [0001] The invention relates to the technical field of preparation of polymer inorganic flame retardant materials, in particular to a method for preparing aluminum hydroxide, a low-smoke, halogen-free polyolefin flame retardant, by a physical method with no pollution, energy saving and environmental protection, regular particles and uniform distribution. Background technique [0002] Aluminum hydroxide is the largest and most widely used inorganic flame retardant additive; as a flame retardant, aluminum hydroxide can not only be flame retardant, but also prevent smoke, no dripping, and no toxic gas. Therefore, it has been widely used Application, usage is also increasing year by year; scope of application: thermosetting plastics, thermoplastics, synthetic rubber, coatings and building materials and other industries; at the same time, aluminum hydroxide is also the basic raw material of aluminum fluoride necessary for the electrolytic aluminum industry. Alumin...

Claims

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Application Information

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IPC IPC(8): C08K9/06C08K9/00C08K3/22C08L23/00
CPCC08K9/06C08K3/22C08K9/00C08L2201/02C08L2201/22C08L23/00
Inventor 宋小兰王小平沈劲松王毅严进红严柯
Owner JINGJIANG CHENYANG CHEM CO LTD
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