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High-heat-resistant high-smoke-inhibition flame retardant and preparation method thereof

A flame retardant, high heat resistance technology, applied in the field of halogen-free flame retardants, can solve the problems of less smoke, reduced polymer mechanical properties, low cost, etc., and achieves low preparation and use costs, excellent heat resistance. , easy to operate effect

Active Publication Date: 2014-02-05
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these inorganic flame retardants require a higher amount of addition to obtain good flame retardancy, which greatly reduces the mechanical properties of the polymer; 2) nitrogen-containing phosphorus-based halogen-free intumescent flame retardants, such flame retardants Halogen-free, when the high polymer containing this type of flame retardant is heated, a uniform foam layer can be formed on the surface, which can play the role of heat insulation, oxygen insulation, and smoke suppression, but the synthesis of halogen-free intumescent flame retardant The process is relatively complicated, and the preparation process will bring pollution to the environment; 3) layered silicate nano-flame retardant, this type of flame retardant is considered by foreign scholars to be a new type of revolutionary flame-retardant material; Silicate nano-flame retardants will not only improve the flame retardant performance of materials, but will not damage the mechanical properties of materials, and will not produce toxic gases during combustion, and the dosage is small, the cost is low, the flame retardant efficiency is high, and the amount of smoke is less. , environmental protection and other characteristics, so researchers try to use silicate nanocomposite polymers as flame retardant materials, but silicate flame retardants are not compatible with polymer materials (such as plastics, rubber, etc.) during use. Okay, so the researchers have made organic modification to the layered silicate, one of the methods is to intercalate the nitrogen-phosphorus-containing dendritic flame retardant into the layered silicate nano-flame retardant to obtain a mixed type Flame retardant, increase the compatibility of each component in the system through the nitrogen and phosphorus-containing dendritic flame retardant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 20g of inorganic montmorillonite into deionized water to prepare a suspension with a mass fraction of 5%; place the resulting suspension in a constant temperature water bath at 60°C, and add 30g of methacryloxyethyltrimethylammonium chloride Add to the suspension, after the addition, keep the reaction for 5 hours under vigorous stirring, filter, and wash the filter cake with deionized water until there is no Cl - Exist, dry at 80°C to obtain modified organic montmorillonite.

[0033] Into the flask, add 2.5 g of 20% G-1 generation amino-terminated polyamide-amine trimeric phosphazene dendrimer in methanol aqueous solution (the volume fraction of methanol is 40%), in N 2 Under protection, slowly add 10g of the modified organic montmorillonite at 50°C. After the addition, the reaction is kept for 7 hours under strong stirring, filtered and dried to obtain an off-white powder solid, which is the said high heat resistance and high smoke suppression Flame retardant.

[0034] ...

Embodiment 2

[0036] Add 20g of inorganic montmorillonite into deionized water to prepare a suspension with a mass fraction of 10%; place the resulting suspension in a constant temperature water bath at 70°C, and add 35g of methacryloxyethyltrimethylammonium chloride After adding to the suspension, after the addition, the reaction is kept for 6h under vigorous stirring, filtered, the filter cake is washed with deionized water until there is no Cl-, and dried at 80°C to obtain the modified organic montmorillonite.

[0037] Into the flask, add 2.5 g of 20% G-2 generation amino-terminated polyamide-amine trimeric phosphazene dendrimer in methanol (55% by volume), in N 2 Under protection, slowly add 15g of the modified organic montmorillonite at 55°C. After the addition, the reaction is kept for 8 hours under strong stirring, filtered and dried to obtain an off-white powder solid, which is the said high heat resistance and high smoke suppression Flame retardant.

[0038] Table 1 shows the test data ...

Embodiment 3

[0040] Add 20g of inorganic montmorillonite into deionized water to prepare a suspension with a mass fraction of 15%; place the resulting suspension in a constant temperature water bath at 80°C, and add 40g of methacryloxyethyltrimethylammonium chloride After adding to the suspension, after the addition, the reaction was kept for 7 hours under vigorous stirring, filtered, the filter cake was washed with deionized water until there was no Cl-, and dried at 80°C to obtain the modified organic montmorillonite.

[0041] Into the flask, add 2.5 g of 20% G-3 generation amino-terminated polyamide-amine trimeric phosphazene dendrimer in methanol aqueous solution (the volume fraction of methanol is 70%), in N 2 Under protection, slowly add 20g of the modified organic montmorillonite at 60°C. After the addition, the reaction is kept for 9h under strong stirring, filtered and dried to obtain an off-white powder solid, which is the said high heat resistance and high smoke suppression Flame re...

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PUM

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Abstract

The invention discloses a high-heat-resistant high-smoke-inhibition flame retardant and a preparation method thereof. The preparation method comprises the following steps: carrying out organization modification on inorganic montmorillonite by using quaternary ammonium salt, and carrying out terminal group modification on amino-terminated polyamide-amine triphosphazene dendriform macromolecules by using the modified organic montmorillonite. The flame retardant is a powdery solid of which the average particle size is 40-80nm; the thermal weight loss central temperature of the flame retardant can reach 400-600 DEG C, which indicates that the flame retardant has excellent heat resistance; the interlamellar spacing of the organic montmorillonite is up to 2.83-5.42nm, which indicates that the flame retardant has favorable compatibility with polymers and can be directly applied to a polymer working process without any complex solution or molten intercalation treatment. The flame retardant has the advantages of low preparation and use cost and the like, and is easy to operate.

Description

Technical field [0001] The invention relates to a flame retardant and a preparation method thereof, in particular to a flame retardant with high heat resistance and high smoke suppression and a preparation method thereof, and belongs to the technical field of halogen-free flame retardants. Background technique [0002] At present, in the field of chemical flame retardants, halogen-based flame retardants are widely used. Although these flame retardants have good flame retardant effects, they will generate a large amount of toxic gas during combustion, and their use has been restricted. [0003] Halogen-free flame retardants have attracted the attention of many researchers because of their safety, smoke suppression, non-toxicity, and low price. There are three main directions in the research of halogen-free flame retardants: 1) Inorganic flame retardants, mainly including metal hydroxides such as magnesium hydroxide and aluminum hydroxide. Because magnesium hydroxide and aluminum hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
Inventor 赵雯王锦成孙一博潘晨赵艺
Owner SHANGHAI UNIV OF ENG SCI