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Active magnesium hydroxide flame retardant and preparation method thereof

A technology of magnesium hydroxide and flame retardant, applied in the field of active magnesium hydroxide flame retardant and its preparation, can solve the problems of inability to obtain compatible products, unsatisfactory product compatibility, explosive metal magnesium, etc. Achieve the effect of improving compatibility, short cycle and low cost

Inactive Publication Date: 2018-12-21
武宣宝丰矿业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Though this method can obviously improve the compatibility between magnesium hydroxide and macromolecular materials, there are also shortcomings. At first, the compatibility of the product is still unsatisfactory; secondly, the preparation method not only uses many raw materials , the metal magnesium in the raw material is also explosive due to being too active, and the process is complicated and the cycle is long, let alone products with higher compatibility.

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  • Active magnesium hydroxide flame retardant and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0034] The concrete steps of preparation are:

[0035] Step 1, dry powdered magnesium hydroxide at 80°C for 15 hours, prepare a mixed solution according to the volume ratio of ethanol, water and bisaminosilane coupling agent at a ratio of 76:3:18; wherein, powdered magnesium hydroxide The particle size is 0.5 μm, and the bisaminosilane coupling agent is N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane.

[0036] Step 2, first disperse the dried powdered magnesium hydroxide in the mixed solution at 70° C. and stir for 60 minutes; wherein, the stirring speed is 300 r / min to obtain a reaction solution. Then the reaction solution is subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, the speed is 5000r / min, and the time is 6min, and the washing process is to use deionized water to separate the solid matter Washing was performed 3 times, the separation of solid matter during washing was centrifugat...

Embodiment 2

[0038] The concrete steps of preparation are:

[0039] Step 1, dry powdered magnesium hydroxide at 88°C for 14 hours, prepare a mixed solution according to the volume ratio of ethanol, water and bisaminosilane coupling agent at a ratio of 77:2.5:19; wherein, powdered magnesium hydroxide The particle size is 20 μm, and the bisaminosilane coupling agent is N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane.

[0040] Step 2, first disperse the dried powdered magnesium hydroxide in the mixed solution at 75° C. and stir for 48 minutes; wherein, the stirring speed is 350 r / min to obtain a reaction solution. Then the reaction solution is subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, the speed is 5500r / min, and the time is 5.5min, and the washing process is to use deionized water to separate the solid The solid matter was washed three times, the solid matter was separated by centrifugation during...

Embodiment 3

[0042] The concrete steps of preparation are:

[0043] Step 1, dry powdered magnesium hydroxide at 95°C for 13 hours, prepare a mixed solution according to the volume ratio of ethanol, water and bisaminosilane coupling agent at a ratio of 78:2:20; wherein, powdered magnesium hydroxide The particle size is 50 μm, and the bisaminosilane coupling agent is N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane.

[0044] Step 2, first disperse the dried powdered magnesium hydroxide in the mixed solution at 80° C. and stir for 35 minutes; wherein, the stirring speed is 400 r / min to obtain a reaction solution. Then the reaction solution is subjected to solid-liquid separation, washing and drying in sequence; wherein, the solid-liquid separation process is centrifugation, the rotation speed is 6000r / min, and the time is 5min, and the washing process is to use deionized water to separate the solid matter Washing was carried out 4 times, the separation of solid matter during washing was c...

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Abstract

The invention discloses an active magnesium hydroxide flame retardant and a preparation method thereof. The flame retardant is prepared by carrying out chemical bonding on powdery magnesium hydroxideand a diamino-silane coupling agent, wherein the molar ratio of the powdery magnesium hydroxide to the diamino-silane coupling agent is 200 to (1 to 2). The method comprises the following steps: drying the powdery magnesium hydroxide and preparing a mixed solution of ethanol, water and the diamino-silane coupling agent; then dispersing the dried powdery magnesium hydroxide into the mixed solutionand stirring to obtain reaction liquid; sequentially carrying out solid-liquid separation, washing and drying treatment on the reaction liquid to obtain a target product. The active magnesium hydroxide flame retardant has higher compatibility with high polymer materials and is prone to be widely commercially applied to the flame retardant field of polymer materials.

Description

technical field [0001] The invention relates to a flame retardant and a preparation method thereof, in particular to an active magnesium hydroxide flame retardant and a preparation method thereof. Background technique [0002] Flame retardants are functional additives that impart flame retardancy to flammable polymers, and are mainly used for flame retardancy of polymer materials. There are many types of flame retardants, among which magnesium hydroxide is an inorganic additive-type halogen-free flame retardant. As a flame retardant added to polymer materials, magnesium hydroxide has the advantages of being non-toxic and tasteless, no toxic and harmful substances will be generated when it is decomposed by heat, high thermal stability, smoke suppression, and cheap and easy to obtain raw materials; however, due to hydrogen The surface of magnesium oxide is very hydrophilic, while the surface of polymer materials is hydrophobic, so the compatibility between magnesium hydroxide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K3/22
CPCC08K3/22C08K9/06C08K2003/2224C08K2201/003
Inventor 赵倩方伟豹张洪文刘广强蔡伟平
Owner 武宣宝丰矿业有限公司
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