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Nano composite intumescent flame retardant and preparation method thereof

An intumescent flame retardant and nano-composite technology, which is applied in the field of flame retardants to improve mechanical properties, reduce production costs, and facilitate industrial implementation

Inactive Publication Date: 2012-01-18
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Throughout the prior art, there is no report on the preparation of a nanocomposite intumescent flame retardant by combining pentaerythritol phosphate melamine salt with magnesium aluminum hydrotalcite

Method used

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  • Nano composite intumescent flame retardant and preparation method thereof
  • Nano composite intumescent flame retardant and preparation method thereof
  • Nano composite intumescent flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0045] Example 2: Studying the Effect of Ultrasonic Conditions on the Particle Size of Nanocomposite Intumescent Flame Retardants

[0046] The preparation method is the same as in Example 1, and the reaction system without ultrasound is used as a parallel reference, and the comparison results are reflected by the XRD pattern, and the results are shown in Figure 5 (a), Figure 5 (b); according to Figure 5 (a), Figure 5 ( b) Calculate the LDH particle size with the Scherrer formula, and the calculation results are shown in Table 1 (a) and Table 1 (b):

[0047] Table 1(a)

[0048]

[0049] Table 1(b)

[0050]

Embodiment 3

[0051] Example 3: Studying the Effect of Different Solvents on the Particle Size of Nanocomposite Intumescent Flame Retardants

[0052] The preparation method is the same as in Example 1, and different solvents are used as the reaction solvent in step (1), and the reaction is carried out under ultrasonic conditions for 1 h. After the reaction, the ultrasonic is turned off, and the crystallization is carried out at 60° C. for 4 h. The results are shown in Figure 6(a) and Figure 6(b) respectively. According to Fig. 6 (a), Fig. 6 (b) calculate LDH particle size with Scherrer formula, calculation result table 2 (a), table 2 (b) as shown:

[0053] Table 2(a)

[0054]

[0055] Table 2(b)

[0056]

Embodiment 4

[0057] Example 4: Studying the effect of different reaction temperatures on the particle size of nanocomposite intumescent flame retardants

[0058] The preparation method was the same as that in Example 1, and different temperatures were used as the temperature for the ultrasonic reaction, and the reaction was kept under ultrasonic conditions for 1 hour. After the reaction was completed, the ultrasonic was turned off, and the crystallization was carried out at 60° C. for 4 hours. The results are shown in Figure 7(a), Figure 7(b), and Figure 7(c). According to Fig. 7 (a), Fig. 7 (b), Fig. 7 (c) use Scherrer formula to calculate LDH particle size, calculation result is shown in table 3 (a), table 3 (b), table 3 (c):

[0059] Table 3(a)

[0060]

[0061] Table 3(b)

[0062]

[0063] Table 3(c)

[0064]

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Abstract

The invention belongs to the field of flame retardants and discloses a method for preparing a nano composite intumescent flame retardant. The method comprises the following steps: (1) dissolving melamine salt of pentaerythritol phosphate, magnesium chloride and aluminum sulfate in an ethanol aqueous solution, and ultrasonically oscillating at the temperature of 50-70 DEG C until the reactants are completely dissolved to obtain a solution A; and (2) dissolving sodium hydroxide and potassium carbonate in deionized water to obtain a solution used as a precipitant B, slowly adding dropwise the precipitant B into the solution A so that white precipitates gradually emerge, after dropwise adding, reacting at the temperature of 50-70 DEG C under the ultrasonic and heat-insulation conditions for 1-2 hours, crystallizing at the temperature of 40-90 DEG C under the heat-insulation condition for 30-90 minutes, cooling, carrying out suction filtration, retaining the solid phase, washing and drying to obtain the nano composite intumescent flame retardant. In the invention, by compounding in-situ generated nano-scale magnesium-aluminum hydrotalcite with the intumescent flame retardant, a novel nano composite intumescent flame retardant is obtained, and the intumescent flame retardant with higher flame retardancy can be prepared, thus the use amount is reduced, and the mechanical performance of the flame-retardant material is improved.

Description

technical field [0001] The invention belongs to the field of flame retardants, in particular to a nano-composite expansion flame retardant containing nano-magnesium-aluminum hydrotalcite. Background technique [0002] With the increasing emphasis on environmental protection and human health, low toxicity and low smoke have become a new development direction for flame retardants. Halogen-free intumescent flame retardants are environmentally friendly flame retardants, but their practical application is limited due to their disadvantages such as large addition amount, poor thermal stability and water solubility. At present, there are mainly two ways to improve the thermal stability of intumescent flame retardants: one is to select acid sources and carbon sources with high thermal stability; the other is to add a small amount of synergist to improve thermal stability and promote char formation reaction , Reduce the amount of smoke and the amount of flame retardants. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/12
Inventor 董延茂刘鑫鲍治宇
Owner SUZHOU UNIV OF SCI & TECH
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