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Process for preparing nano inorganic compound flame retardant by transfer method

A technology of inorganic flame retardants and composite flame retardants, which can be used in fire-retardant coatings and other directions, and can solve the problems of the influence of the mechanical properties of flame-retardant composite materials.

Inactive Publication Date: 2007-05-09
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each component in the composite flame retardant is subjected to ordinary dry surface treatment and then mixed or mixed with a surface modifier for surface treatment, although the two dry modification methods obtained Flame retardants have little effect on the flame retardant effect of flame retardant composite materials, but have a greater impact on the mechanical properties of flame retardant composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The inorganic nano-flame retardant is aluminum hydroxide with an average particle size of 100 nanometers, the inorganic micro-flame retardant is magnesium hydroxide with an average particle size of 5 microns, and the surface modifier selected is isostearyl methacryloyl oxyacetyl base titanate (titanate coupling agent). The mass ratio of nanometer aluminum hydroxide to micrometer magnesium hydroxide is 2:1, and the addition amount of titanate coupling agent is 0.5% of the sum of nanometer aluminum hydroxide and micrometer magnesium hydroxide.

[0023] Operation method: first add micron magnesium hydroxide into the high-speed mixer, add phthalate coupling agent according to the mass ratio of micron magnesium hydroxide: titanate coupling agent 100: 1.5, then start the high-speed mixer, at a speed of 1000r / min Under high speed stirring for 10 minutes, the titanate coupling agent is coated on the surface of the micron magnesium hydroxide particles. Add nano aluminum hydroxi...

Embodiment 2

[0025]100 parts of the nano-inorganic composite flame retardant prepared in Example 1 and 100 parts of EVA were used to prepare a flame-retardant composite material, and its tensile strength was 8.4 MPa.

Embodiment 3

[0027] Magnesium hydroxide with an average particle diameter of 100 nanometers was used instead of nano-aluminum hydroxide in Example 1, and the remaining conditions were the same as in Example 1 to prepare a nano-inorganic composite flame retardant.

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PUM

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Abstract

The present invention is transferring process of preparing composite nanometer inorganic flame retardant, and large micron level magnesium hydroxide particle is used as carrier for the surface modification of nanometer composite flame retardant. The composite nanometer inorganic flame retardant consists of nanometer inorganic flame retardant, micron level magnesium hydroxide and auxiliary flame retardant. The nanometer inorganic flame retardant is nanometer aluminum hydroxide or nanometer magnesium hydroxide of average particle size not larger than 100 nm. The micron level magnesium hydroxide has average particle size of 1-10 microns. Through high speed stirring mixing of surface modifier and micron level magnesium hydroxide, adding nanometer inorganic flame retardant before further stirring and adding auxiliary flame retardant via stirring, the composite nanometer inorganic flame retardant with surface coating surface modifier and high tensile strength is prepared.

Description

technical field [0001] The invention relates to a method for surface modification treatment of nanocomposite flame retardant particles, which is a method for surface modification treatment of nanocomposite flame retardants by using micron-sized magnesium hydroxide large particles in the composite flame retardant raw material as a carrier . Background technique [0002] The main varieties of inorganic flame retardants are aluminum hydroxide and magnesium hydroxide, which have the functions of flame retardancy and smoke elimination, and are the main flame-retardant components of halogen-free flame-retardant materials. The main varieties of inorganic nano-flame retardants are nano-aluminum hydroxide and nano-magnesium hydroxide, and the flame retardant effect is that the nano-scale is better than the micro-scale. [0003] As inorganic flame retardants, aluminum hydroxide and magnesium hydroxide are added in large amounts in flame-retardant composite materials. When aluminum h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K21/02
Inventor 陈建峰王国全曾晓飞
Owner BEIJING UNIV OF CHEM TECH