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Materials of high flame-retardancy organic intercalation layered clay and preparation method thereof

A layered clay, high flame retardant technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of low ion concentration, poor solubility, and the influence of ion exchange reaction, and achieve comprehensive performance improvement, phase Good capacity and the effect of improving solubility

Inactive Publication Date: 2010-07-28
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the amine group of melamine and phosphoric acid form phosphate salt water, the solubility is poor, and the ion concentration is low, so its ion exchange reaction is affected.

Method used

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  • Materials of high flame-retardancy organic intercalation layered clay and preparation method thereof
  • Materials of high flame-retardancy organic intercalation layered clay and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] First, 5 grams of montmorillonite with a total amount of cation exchange of 90 mmol / 100 g was added to 250 ml of dispersion medium water with high-speed stirring or ultrasonic vibration to form a stable suspension, and left to stand, and the coarser particles in the lower layer were filtered off to obtain the filtrate. use. Disperse 6.3 grams of melamine in 100ml of deionized water, heat to 90°C, stir at high speed to form a stable dispersion system, dilute 8.35ml, 36.5% concentrated hydrochloric acid with 50ml of deionized water, add dropwise, and control the temperature during the addition of hydrochloric acid. Stirring speed to prevent agglomeration. After the addition, keep the temperature constant, react for 1.5 hours, cool, precipitate, filter, and wash until nearly neutral, and the white powdery solid obtained is melamine hydrochloride. Dissolve an appropriate amount of melamine hydrochloride in 50ml of water, heat and stir to form a colorless solution, then slow...

Embodiment 2

[0043] First, 5 grams of montmorillonite with a total amount of cation exchange of 90 mmol / 100 g was added to 250 ml of dispersion medium water with high-speed stirring or ultrasonic vibration to form a stable suspension, and left to stand, and the coarser particles in the lower layer were filtered off to obtain the filtrate. use. Disperse 6.3 grams of melamine in 100ml of deionized water, heat to 90°C, and stir at high speed to form a stable dispersion system. Dilute 3.55ml of 85% concentrated phosphoric acid with 25ml of deionized water and add dropwise. When half of the phosphoric acid is added , increase the stirring speed to prevent agglomeration, after the feeding is completed, keep the temperature constant, and react for 2.5 hours to obtain a milky white suspension that is a melamine phosphate suspension. 5.57ml of 36.5% hydrochloric acid was diluted with 50ml of deionized water, slowly added dropwise, and reacted for 1.5 hours to form a transparent and clear solution. ...

Embodiment 3

[0046] First, 5 grams of montmorillonite with a total amount of cation exchange of 90 mmol / 100 g was added to 250 ml of dispersion medium water with high-speed stirring or ultrasonic vibration to form a stable suspension, and left to stand, and the coarser particles in the lower layer were filtered off to obtain the filtrate. use. Disperse 12.75 grams of melamine urea cyanate (MCA) in 100 ml of deionized water, heat to 90 ° C, and stir at a high speed to form a stable dispersion system. Dilute 3.28 ml of 36.5% concentrated hydrochloric acid with 50 ml of deionized water and slowly add it dropwise , after the feeding is completed, keep the temperature constant, react for 1.5 hours, cool, precipitate, filter, and wash until nearly neutral, and the white powdery solid obtained is uric acid melamine hydrochloride. Disperse an appropriate amount of uric acid melamine hydrochloride in 50ml of water, heat and stir to form a colorless solution, slowly add it dropwise into the montmori...

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Abstract

The invention relates to materials and a method for preparing high flame-retardancy organic intercalation layered clay. The method is performed by inserting melamine or derivatives of melamine into layered clay, especially montmorillonite layers, and the invention is characterized in that the inserted material is at least one compound of salt formed by melamine or derivatives of melamine and an organic acid and is inserted in the clay by cation exchange. The invention also relates to a method for preparing the materials. In the method, the materials are prepared from melamine, derivatives of the melamine and the layered clay by the steps of material mixing, dispersing, cation exchange, grinding and the like. The organic layered clay prepared by the invention can disperse in polymers, has excellent expansion performance and flame retardancy, and can be used as an expansion type fire prevention additive, or used as an expansion type flame retardant component for preparing additives of flame retardant plastic, rubber, thin films, coating, foam plastic and the like.

Description

technical field [0001] The invention belongs to the field of organic small molecules and their derivatives intercalating inorganic nanometer materials, especially layered clay materials and preparation methods thereof, and specifically relates to a material and method of organic intercalation layered clay with high-efficiency flame retardancy. Background technique [0002] Layered clay is a kind of layered silicate minerals that exist in nature, such as montmorillonite (MMT), which usually belongs to a 2:1 layered structure, which is sandwiched by two pieces of silicon-oxygen tetrahedron between a piece of aluminum-oxygen octahedron. A layered structure formed by sharing oxygen atoms. The thickness of each sheet is about 1nm, the sheet is roughly disc-shaped, and the effective diameter can vary from 30nm to 10μm. The sheets are stacked by electrostatic interaction to form a layered structure, and the isomorphic replacement inside the sheet (for example, Al 3+ By Mg 2+ or ...

Claims

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Application Information

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IPC IPC(8): C01B33/44
Inventor 李娟方科益柯晨浩顾群范欣愉严庆
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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