Organic bentonite for composite flame retardants and preparation process thereof

A compound flame retardant and preparation process technology, applied in the treatment of dyed low molecular organic compounds, fibrous fillers, etc., can solve the problems of improved flame retardancy of organic bentonite, high degree of organic bentonite, and high cost, and achieve good flame retardancy. performance, good dispersion, good flame retardant performance

Inactive Publication Date: 2012-07-25
SHANDONG UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing at present about the report of organic bentonite preparation technology, as: 1, the patent No. is 00101420.X " production method of organic bentonite " adopts extrusion modification method, octadecyl quaternary ammonium salt is mixed with solvent, then adds into the material, extruded in a self-heating extruder to obtain organic bentonite, which has low investment, high efficiency, and is suitable for large-scale production. The disadvantage is that the organic matter content in the obtained organic bentonite is low, and the lipophilic effect is poor It is suitable for the application in the modification of polymer materials; 2. The patent No. 200710188484.7 "Preparation method of secondary intercalation organic bentonite" uses nickel nitrate, cobalt nitrate and other transition metal salts to treat sodium-based bentonite to form a transition metal ion intercalation layer, and then use hexadecyl trimethyl ammonium bromide to carry out secondary organic intercalation to form secondary organic intercalation. The advantage is that the obtained bent

Method used

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  • Organic bentonite for composite flame retardants and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Add 3 parts of sodium hexametaphosphate to 500 parts of deionized water, and then add 50 parts of sodium bentonite, and prepare 2 bentonite suspension by high-speed stirring; combine 10 parts of Cyagard RF-1 and 10 parts of cetyltrimethyl Ammonia bromide was added to 200 parts of deionized water and stirred at high speed to obtain a composite organic cation surface modifier solution; the composite cation modifier solution was added to the bentonite suspension under high-speed stirring, and the pH of the solution was adjusted with ammonia It is 8, react at 75°C for 2 hours, stand and cool to normal temperature, centrifuge the lower sediment and place it at 80°C for vacuum drying, and crush to obtain organic bentonite.

[0015] After testing, the performance indicators of the obtained organic bentonite are as follows: density 1.78g / cm 3 , The whiteness is 85%, the moisture content is 2.7%, and the interlayer spacing is 2.685nm.

Embodiment 2

[0017] The implementation method is the same as in Example 1, changing the adding amount of sodium hexametaphosphate to 4 parts, and adjusting the pH to 9.

Embodiment 3

[0019] Add 3 parts of sodium hexametaphosphate to 500 parts of deionized water, and then add 50 parts of sodium bentonite, and stir at high speed to prepare a bentonite suspension; mix 12 parts of Cyagard RF-1 and 8 parts of cetyltrimethyl bromide Ammonia was added to 200 parts of deionized water and stirred at high speed to obtain a composite cationic surface modifier solution; the composite cationic modifier solution was added to the bentonite suspension under high-speed stirring, and the pH of the solution was adjusted to 8 with ammonia , React at a temperature of 75°C for 2 hours, stand and cool to room temperature, centrifuge the lower layer of the precipitate and place it at 80°C for vacuum drying, and crush to obtain organic bentonite.

[0020] After testing, the performance indicators of the obtained organic bentonite are as follows: density 1.72g / cm 3 , The whiteness is 83%, the moisture content is 2.8%, and the interlayer spacing is 2.425nm.

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Abstract

The invention provides a preparation process for an organic bentonite for composite flame retardants, which adopts sodium bentonite as a raw material to be mixed with composite organic cation surfactant. The preparation process is characterized in that: 3 to 4 parts of sodium hexametaphosphate is added into 300 to 500 parts of deionized water, 30 to 50 parts of sodium bentonite is then added, and after high-speed agitation, bentonite suspension solution is produced; 12 to 20 parts of composite organic cation surfactant is added into 120 to 200 parts of solvent, and after high-speed agitation, composite organic cation surface modifier solution is produced; under the state of high-speed agitation, the composite organic cation surface modifier solution is added into the bentonite suspension solution, ammonia is used for regulating the pH of the mixed solution to be 8 to 9, agitation is carried out under thermostatic waterbath of 75 DEG C to 85 DEG C for 2 hours, centrifugal separation is carried out after the temperature is cooled to the room temperature, and after vacuum drying under 80 DEG C to 90 DEG C and grinding, the organic bentonite for the composite flame retardants is prepared. The organic bentonite obtained by the method has good lipophilicity and a good flame-retardant effect, and can be applied in the modification of paint, ink and plastic, and while the dosage of other flame retardants is reduced and the cost is saved, the flame-retardant property and mechanical property of polymer can be enhanced as well.

Description

Technical field [0001] The invention belongs to the technical field of fine processing of bentonite, and specifically relates to a preparation method of organic bentonite for composite flame retardants. Background technique [0002] Bentonite is a non-metallic mineral with montmorillonite as the main component. The crystalline structure of montmorillonite is a 2:1 layered structure of two silicon-oxygen tetrahedrons and a layer of aluminum-oxygen octahedron, which has good expansibility. , Adsorption, adhesion, catalysis, thixotropy, suspension, cation exchange and large internal and external specific surface area, known as "universal" clay. my country is rich in bentonite resources, second only to the United States, ranking second in the world. Organobentonite is a deep processed product of bentonite. Due to its hydrophobic and lipophilic properties, it has good dispersibility, solubilization and emulsification in organic solvents, so it is widely used in plastics, paints, inks...

Claims

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Application Information

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IPC IPC(8): C09C1/42C09C3/08C08K9/04C08K3/34
Inventor 刘曙光孟繁茂张珍一彭辉王戌
Owner SHANDONG UNIV OF TECH
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