Modified magnesium hydroxide, flame retardant and preparation and application thereof

A magnesium hydroxide and flame retardant technology, applied in cells, electrolytic processes, electrolytic components, etc., can solve the problems of difficult high-end flame retardant materials, poor mechanical properties of materials, difficult to control particle size, etc., to reduce production difficulty , Improve the mechanical properties, improve the compatibility effect

CN113583296AActive Publication Date: 2021-11-02YINGKOU INST OF TECH
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2021-11-02

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention relates to the technical field of electrochemical synthesis, in particular to modified magnesium hydroxide, a flame retardant and preparation and application thereof. Seawater or brine is subjected to standing, filtering and impurity removal, then electrolytic filtering is performed to obtain white precipitates, and the modified magnesium hydroxide is obtained after cleaning, filtering and drying. The scheme has the following characteristics: 1) the flaky morphology control of the small-particle-size Mg (OH) 2 is completed by adopting the process control of adding Li < + >, proper PH, proper current intensity and the like; 2) hydrophobic modification is completed while Mg (OH) 2 is prepared by introducing a cationic modifier, so that the compatibility with a polymer base material is improved, and the anti-agglomeration performance is greatly improved; 3) Mg (OH) 2 has better dispersity, and a better effect is achieved in a flame retardant property test; and 4) brine obtained after potassium extraction from a salt lake is adopted as a magnesium source, the problem of magnesium harm is effectively solved, the raw material source is wide, the cost is low, a new way for brine utilization is developed, and by-products can be recycled.
Need to check novelty before this filing date? Find Prior Art

Description

Technical field

[0001] The present invention relates to electrochemical synthesis techniques, and in particular relates to a modified magnesium hydroxide, flame retardants, their preparation and use. Background technique

[0002] Inorganic flame retardant is the most used a Class environmentally friendly flame retardants, products for industrial applications including metal such as aluminum, magnesium and molybdenum hydroxides, boric acid, and ammonium phosphates. Magnesium hydroxide as a good inorganic flame retardant, both flame retardancy, and smoke suppressing filler triple functions, has a broad application prospect. The present inventors found that: prior Ultrafine Mg (OH) 2 Flame Retardant Industry calcium hydroxide precipitation on, Mg (OH) prepared by this method 2 Often contain a lot of calcium impurities, and Mg (OH) 2 Irregular shape, easy to agglomerate, the particle size is difficult to control, difficult to use as high a flame retardant material; the same laborator...

Examples

preparation example Construction

[0048] A modified method of magnesium hydroxide, such as figure 1 As shown, including the following steps:

[0049] Step 1, after the brine after the salt lake is placed, then filtered, the solution is mixed;

[0050] Step 2, to the mixed solution, a soluble carbonate, a soluble lithium salt, hydrochloric acid, and remove calcium ions and carbonate mixed solutions.

[0051] Step, the electrolytic cell is divided into an anode region and a cathode region by the diaphragm, and the mixed solution is injected into the electrolytic cell anode region and the cathode region, and the modifier is added to the electrolytic cell anode region;

[0052] Step 4 through a current density 0.025-0.0040A / cm 2 , Electrolysis at a temperature of 20-35 deg.] C to give a white precipitate;

[0053] Step 5, the white precipitate was washed with deionized water and then filtered, dried the modified magnesium hydroxide.

[0054] Preferably, the modifying agent comprises (3-acrylamide propyl) trimethylam...

Embodiment 1

[0076] On the basis of the embodiment disclosed embodiments, discloses a modified magnesium hydroxide, magnesium hydroxide and a microstructure comprising modified outer layer; median particle size of the magnesium hydroxide in 5 m; as the figure 2 FIG modified magnesium hydroxide 10g / L aqueous contact angle of 60 degrees.

[0077] like Figure 4 As shown in the shape of a sheet-modified magnesium hydroxide.

[0078] Preferably, the outer layer is a modified (3-acrylamide propyl) trimethylammonium chloride.

[0079] A modified magnesium hydroxide method, comprising the steps of:

[0080] Step 1, after the brine after the salt lake is placed, then filtered, the solution is mixed;

[0081] Step 2, to the mixed solution, a soluble carbonate, a soluble lithium salt, hydrochloric acid, and remove calcium ions and carbonate mixed solutions.

[0082] Step, the electrolytic cell is divided into an anode region and a cathode region by the diaphragm, and the mixed solution is injected into...

Embodiment 2

[0103] Based on the disclosed embodiment, there is a modified magnesium hydroxide, a microstructure comprising magnesium hydroxide and an external modification layer; the median diethylene moister is 33 μm; the modified magnesium hydroxide 10g / L aqueous solution The contact angle is 68 degrees.

[0104] Preferably, the modified magnesium hydroxide comprises a sheet shape, a particulate and an irregular shape.

[0105] Preferably, the outer modified layer is methacryloxyethyltrimethyl chloride.

[0106] A modified magnesium hydroxide preparation method, including the following steps:

[0107] Step 1, after the brine after the salt lake is placed, then filtered, the solution is mixed;

[0108] Step 2, to the mixed solution, a soluble carbonate, a soluble lithium salt, hydrochloric acid, and remove calcium ions and carbonate mixed solutions.

[0109] Step, the electrolytic cell is divided into an anode region and a cathode region by the diaphragm, and the mixed solution is injected...