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Method for preparing nanometer modified compound fire retardant

A composite flame retardant and nano-modification technology, which is applied in the field of modified composite flame retardants and their preparation, can solve the problems of high negative charge, low purity, and difficulty in large-scale application, so as to reduce the addition amount and reduce the processing technology. Simple, slow diffusion effect

Inactive Publication Date: 2010-09-22
BENGBU HUAYANG POWDER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Montmorillonite sheets have high negative charge and low purity defects, so it is difficult to apply on a large scale in actual production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Aluminum hydroxide 95

[0022] Nano Kaolin 15

[0023] Silane coupling agent 5

[0024] The above-mentioned nano-kaolin has a thickness of 30 nanometers, a diameter of 400 nanometers, and a loose density of 0.02 g / cm 3 . The average particle size of aluminum hydroxide is not greater than 1.1 μm.

Embodiment 2

[0026] Aluminum hydroxide 80

[0027] Nano Kaolin 14

[0028] Titanate coupling agent 4

[0029] The above-mentioned nano-kaolin has a thickness of 40 nanometers, a diameter of 500 nanometers, and a loose density of 0.04 g / cm 3 . The average particle size of aluminum hydroxide is not greater than 1.1 μm.

Embodiment 3

[0031] Magnesium hydroxide 65

[0032] Nano Kaolin 12

[0033] Silane coupling agent 3.2

[0034] The above-mentioned nano-kaolin has a thickness of 50 nanometers, a diameter of 600 nanometers, and a loose density of 0.06g / cm 3 . The average particle size of magnesium hydroxide is not greater than 1.1 μm.

[0035] The preparation method of the modified composite flame retardant is to preheat the high-speed mixer first, and the temperature reaches 100-120°C, then start to add aluminum hydroxide or magnesium hydroxide, after the addition is completed, start the mixer of the mixer for high-speed stirring, and then slow down after 5 minutes. Add the silane coupling agent and keep stirring for 10 minutes, then add nano-kaolin and mix and stir for 25 minutes.

[0036] Two sets of examples are given below to illustrate the application of the present invention to thermoplastic polymeric flame retardant materials.

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Abstract

The invention provides a method for preparing a nanometer modified compound fire retardant. In the method, nanometer kaolin is used as a fire retardant synergist, and the compound components are forced to be better bonded with macromolecules due to the activity of nanometer particles, so that the adding amount of a coupling agent is reduced, and the method has the advantages of low preparation cost and simple process; the gas barrier property is improved because of the addition of the nanometer kaolin; and in a burning process, the nanometer kaolin can form a charring silicate structure on the surface of the compound material, the charring silicate structure has heat-insulating and separating effects on the unburned materials under the charring silicate structure, and inflammable gases generated due to thermal decomposition are difficult to escape, so that the volatile products are delayed from dispersion, the mass loss rate of the compound material is lowered, the fire retardant property is improved, and the compound fire retardant of the invention can be widely applied to thermal plastic polymerization fire retardant materials.

Description

technical field [0001] The invention relates to the field of chemical preparations, in particular to a modified composite flame retardant and its preparation method and application. Background technique [0002] Flame retardants are widely used in the cable industry. Generally, halogen-containing flame-retardant materials release a large amount of smoke and toxic and corrosive gases when they are on fire, causing great damage to personnel and equipment, that is, secondary disasters. Low-smoke halogen-free flame-retardant materials can avoid the secondary disaster caused by the combustion of halogen-containing flame-retardant materials, which is the main development trend of flame-retardant materials. [0003] At present, the inorganic flame retardant fillers mainly used in the electrical industry are aluminum hydroxide and magnesium hydroxide. Aluminum hydroxide is better than magnesium hydroxide in terms of suppressing the temperature rise of the material, reducing the he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K3/22C08K3/34
Inventor 彭寿陈自强苏宪君宋在芝韩晖
Owner BENGBU HUAYANG POWDER TECH
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