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Intumescent flame retardant modified montmorillonite and preparation method thereof

An intumescent flame retardant and montmorillonite technology, applied in the field of flame retardants, can solve the problems of difficulty in uniform dispersion and affect the synergistic flame retardant effect, so as to reduce secondary hazards, improve compatibility, and improve lipophilicity. Effect

Active Publication Date: 2015-12-16
TAIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this system is only obtained through simple physical blending of the three. It is difficult to achieve uniform dispersion of montmorillonite and intumescent flame retardant in the polymer matrix, which seriously affects the synergistic flame retardant effect of the two during the combustion process of the material.

Method used

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  • Intumescent flame retardant modified montmorillonite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 8g of montmorillonite to 150mL of toluene, ultrasonically disperse it for 30 minutes, transfer it to a dry four-neck flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a dropping funnel, and drop 0.753g of N-aminoethyl - Gamma-aminopropyltrimethoxysilane and 15mL toluene mixed solution, raised to reflux temperature, continued to stir for 6 hours, then cooled to 45°C, added dropwise 1.247g 2-oxo-2-chloro-5,5- The mixed solution of dimethyl-1,3,2-dioxaphosphorinane, 3.6 g of triethylamine and 15 mL of toluene was continued to react for 6 hours. Then the suspension obtained by the reaction was filtered, washed repeatedly with methanol, and dried in an oven at 80° C. for 24 hours to obtain an intumescent flame retardant modified montmorillonite, wherein the mass content of the intumescent flame retardant was 20%.

Embodiment 2

[0022] Add 6.467g of montmorillonite to 100mL of toluene, ultrasonically disperse for 30 minutes, then transfer it to a dry four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a dropping funnel, and add 0.0753g of N-aminoethyl ether dropwise at room temperature Base-γ-aminopropyltrimethoxysilane and 10mL of toluene mixed solution, and raised to reflux temperature, continued stirring reaction for 6 hours, cooled to 50 ° C, dropwise added 0.1247g 2-oxo-2-chloro-5,5- The mixed solution of dimethyl-1,3,2-dioxaphosphorinane, 0.5 g of triethylamine and 10 mL of toluene was continued to react for 4 hours. Then the suspension obtained by the reaction was filtered, washed repeatedly with methanol, and dried in an oven at 80° C. for 24 hours to obtain an intumescent flame retardant modified montmorillonite, wherein the mass content of the intumescent flame retardant was 3%.

Embodiment 3

[0024] Add 6g of montmorillonite to 80mL of toluene, ultrasonically disperse it for 30 minutes, then transfer it to a dry four-necked flask equipped with a mechanical stirrer, a thermometer, a reflux condenser and a dropping funnel, and add 2.188g of N-aminoethyl - Mixed solution of γ-aminopropyltrimethoxysilane and 20mL toluene, raised to reflux temperature, continued to stir for 6 hours, cooled to 30°C, added dropwise 2.812g of 2-oxo-2-chloro-5,5-di The mixed solution of methyl-1,3,2-dioxaphosphorinane, 5.4 g of triethylamine and 30 mL of toluene was continued to react for 5 hours. Then the suspension obtained by the reaction was filtered, washed repeatedly with methanol, and dried in an oven at 80° C. for 24 hours to obtain an intumescent flame retardant modified montmorillonite, wherein the mass content of the intumescent flame retardant was 40%.

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Abstract

The invention relates to a flame retardant, in particular to intumescent flame retardant modified montmorillonite and a preparation method thereof. The structure of the intumescent flame retardant modified montmorillonite is shown in the formula (I) (in the description), wherein in the formula (I), the strip-shaped object refers to the montmorillonite, and the compound grafted onto the surface of the montmorillonite is an intumescent flame retardant. In the intumescent flame retardant modified montmorillonite, the intumescent flame retardant is connected with the montmorillonite through chemical bonds. The intumescent flame retardant modified montmorillonite is suitable for high polymer material modification with the processing temperature within 320 DEG C, and is insoluble in water and organic solvents.

Description

technical field [0001] The invention relates to a flame retardant, in particular to an intumescent flame retardant modified montmorillonite and a preparation method thereof. Background technique [0002] When the polymer / montmorillonite composite material is burned, a porous silicate-containing carbon layer is formed on the surface of the polymer. This layer serves as an excellent insulation and mass transfer barrier to improve the flame retardancy of the material and delay the volatilization of the material when it is thermally decomposed. release of sexual products. Use montmorillonite and intumescent flame retardants (such as ammonium polyphosphate, melamine polyphosphate, etc.) to jointly modify polyurethane, nylon 6, unsaturated polyester, epoxy resin, etc. Adding conventional flame retardants to polymer / montmorillonite nanocomposites can significantly reduce the amount of flame retardants (compared with pure high polymers) without reducing the flame retardant level. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/06C08K9/04C08K3/34C08L75/04
Inventor 俞金娜黄国波汪鹏飞陈倩滢谷新剑罗仁新
Owner TAIZHOU UNIV
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