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Dendritic flame-retardant layered silicate and preparation method thereof

A technology of dendritic and flame retardant layer, applied in the field of dendritic flame retardant layered silicate and its preparation, can solve the problem of insignificant flame retardant effect of layered silicate, and achieve improved flame retardant and mechanical properties. Effect

Inactive Publication Date: 2010-09-08
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are still many problems in montmorillonite that need to be further studied and solved, such as: the flame retardant effect of layered silicate is not significant, the preparation of exfoliated organic montmorillonite, and the solution of these problems is very important for organic montmorillonite as a flame retardant The application of the agent is very critical

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 75g of inorganic montmorillonite and 25mL of 1-butyl-3-methylimidazolium hexafluorophosphate into a three-neck flask, add 50 mL of ethanol aqueous solution with a volume concentration of 40%, heat to about 75°C, and stir for 4 h , followed by solid-liquid separation, washing, and vacuum drying at 70°C to obtain organic montmorillonite.

[0031] Weigh 40 g of organic montmorillonite, 1 mole of butanediamine, 2 moles of acrylonitrile and 0.2 moles of iron in a four-necked flask, stir at 70 ° C for 8 h under nitrogen protection, and then vacuumize to remove unreacted monomers. A dope containing grafted organomontmorillonite and ungrafted polymer was obtained. The product was washed with methanol, centrifuged and precipitated, and the precipitate was washed with methanol and centrifuged again. The above steps were repeated until no unreacted substances and polymers were detected in the washing solution. The precipitate was vacuum-dried at 30 °C for 8 h to obtain dend...

Embodiment 2

[0034] Weigh 60g of inorganic montmorillonite and 36mL of dialkylimidazolium hexafluorophosphate into a three-necked flask, add 60mL of 50% ethanol aqueous solution, heat to about 78°C, stir for 3h, then separate solid from liquid, wash , and dried in vacuum at 80°C to obtain organic montmorillonite.

[0035] Weigh 50 g of organic montmorillonite, 1 mole of butanediamine, 2.5 moles of acrylonitrile and 0.3 moles of cobalt in a four-necked flask, stir at 80 ° C for 6 h under nitrogen protection, and then vacuumize to remove unreacted monomers, A dope containing grafted organomontmorillonite and ungrafted polymer was obtained. The product was washed with methanol, centrifuged and precipitated, and the precipitate was washed with ethanol and centrifuged again. The above steps were repeated until no unreacted substances and polymers were detected in the washing solution. The precipitate was vacuum-dried at 40 °C for 7 h to obtain dendritic organomontmorillonite.

[0036] Weigh 2...

Embodiment 3

[0038] Weigh 35g of inorganic montmorillonite and 49mL of 1-(2-hydroxyethyl)-3-methylimidazolium chloride and add it to a three-necked flask, and add 70 mL of 60% ethanol aqueous solution and heat to 80 ℃, stirring for 2 h, then solid-liquid separation, washing, and vacuum drying at 90 ℃ to obtain organic montmorillonite.

[0039] Weigh 60 g of organic montmorillonite, 1 mole of butanediamine, 3 moles of acrylonitrile and 0.4 mole of iron in a four-necked flask, stir at 90 ° C for 5 h under nitrogen protection, and then vacuumize to remove unreacted monomers, A dope containing grafted organomontmorillonite and ungrafted polymer was obtained. The product was washed with methanol, centrifuged and precipitated, and the precipitate was washed with isopropanol and centrifuged again. The above steps were repeated until no unreacted substances and polymers were detected in the washing solution. The precipitate was vacuum-dried at 50 °C for 6 h to obtain dendritic organomontmorilloni...

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Abstract

The invention discloses dendritic flame-retardant layered silicate and a preparation method thereof, and the preparation method comprises the following steps: (1) mixing inorganic montmorillonite and high heat-resistant organic intercalator, adding ethanol water solution, stirring for 2-4h at 75-80DEG C and collecting high heat-resistant organic montmorillonite; (2) stirring the high heat-resistant organic montmorillonite, putrescine, acrylonitrile and catalyst for 5-8h at 70-90DEG C, and then collecting dendritic organic montmorillonite from the product; and (3) stirring the dendritic organic montmorillonite and alpha-(diphenylphosphino) acetic acid for 1-2h at 60-80DEG C, then adding zinc borate, and stirring for 2-4h at 70-90DEG C, thus obtaining the dendritic flame-retardant layered silicate. The dendritic flame-retardant layered silicate is applicable to rubber industry and cable industry, which can not only replace the traditional environmental-unfriendly flame-retardant and reinforcing material of high price, but also improve the performance of rubber material, such as flame resistance, mechanical properties and the like.

Description

technical field [0001] The invention relates to a dendritic flame-retardant layered silicate and a preparation method thereof. Background technique [0002] The disasters that fire brings to human beings are disastrous, and the losses are huge. With the development of economy and urban construction, the fire loss is on the rise, so the prevention of fire is very important at home and abroad. One-third of the people who died in the fire were suffocated by inhaling the toxic gases released during the burning. Commonly used halogenated flame retardants decompose a large amount of toxic smoke during combustion, which can easily poison and suffocate people present and affect vision and escape. According to early reports, halogenated flame retardants also have carcinogenic effects, so many developed countries have banned their use . Hydroxide integrates the triple functions of flame retardant, smoke suppression and filling. It is non-toxic and non-corrosive substances produced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L51/10C08F292/00C08K3/38C08K5/51C08L21/00
Inventor 王锦成杨科郑晓昱
Owner SHANGHAI UNIV OF ENG SCI
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