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Composite intumescent flame retardant and preparation method thereof

An intumescent flame retardant and composite intumescent technology, which is applied in the field of flame retardant, can solve the problems of large addition amount, limited popularization and use, and deterioration of the mechanical properties of the polymer matrix, so as to increase the interlayer spacing, improve compatibility, and reduce environmental hazards. small effect

Inactive Publication Date: 2021-01-29
OECHSLER PLASTIC PROD TAICANG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, LDHs-type flame retardants generally have the disadvantages of adding a large amount and deteriorating the mechanical properties of the polymer matrix, which largely limits the popularization and use of this type of flame retardants.

Method used

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  • Composite intumescent flame retardant and preparation method thereof
  • Composite intumescent flame retardant and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The preparation method of the sodium oleate modified calcium magnesium aluminum hydrotalcite of dodecyl sulfate radical type is as follows:

[0032] (1) Using the co-precipitation method, take 0.06mol Ca (NO 3 ) 2 4H 2 O, 0.12molMg(NO 3 ) 2 ·6H 2 O and 0.06molAl(NO 3 ) 3 9H 2 Dissolve O in carbon dioxide-free water and mark it as solution A. Dissolve 1mol NaOH in carbon dioxide-free water and mark it as solution B. Add solutions A and B to the flask respectively, stir at room temperature, keep the pH at 9, and complete the dropwise addition Continue stirring for 1 hour, crystallize at 60°C for 13 hours, filter with suction, wash with carbon dioxide-free water until neutral, dry at 60°C, grind, pass through a 60-80 mesh sieve (177-250 μm), and record it as CaMgAl-LDHs .

[0033] (2) Using the ion exchange method, take 15g CaMgAl-LDHs and 16.2g sodium dodecyl sulfate (SDS) and dissolve them in decarbonated water, stir for 13 hours at room temperature, filter with...

Embodiment 2

[0038] The preparation method of the sodium oleate modified calcium magnesium aluminum hydrotalcite of dodecyl sulfate radical type is as follows:

[0039] (1) Using the co-precipitation method, take 0.06mol Ca (NO 3 ) 2 4H 2 O, 0.12molMg(NO 3 ) 2 ·6H 2 O and 0.06molAl(NO 3 ) 3 9H 2 Dissolve O in carbon dioxide-free water and mark it as solution A. Dissolve 1mol NaOH in carbon dioxide-free water and mark it as solution B. Add solutions A and B to the flask respectively, stir at room temperature, keep the pH at 9, and complete the dropwise addition Continue stirring for 1 hour, crystallize at 60°C for 13 hours, filter with suction, wash with carbon dioxide-free water until neutral, dry at 60°C, grind, pass through a 60-80 mesh sieve (177-250 μm), and record it as CaMgAl-LDHs .

[0040] (2) Using the ion exchange method, take 15g CaMgAl-LDHs and 16.2g sodium dodecyl sulfate (SDS) and dissolve them in decarbonated water, stir for 13 hours at room temperature, filter with...

Embodiment 3

[0045] The preparation method of the sodium oleate modified calcium magnesium aluminum hydrotalcite of dodecyl sulfate radical type is as follows:

[0046] (1) Using the co-precipitation method, take 0.06mol Ca (NO 3 ) 2 4H 2 O, 0.12molMg(NO 3 ) 2 ·6H 2 O and 0.06molAl(NO 3 ) 3 9H 2 Dissolve O in carbon dioxide-free water and mark it as solution A. Dissolve 1mol NaOH in carbon dioxide-free water and mark it as solution B. Add solutions A and B to the flask respectively, stir at room temperature, keep the pH at 9, and complete the dropwise addition Continue stirring for 1 hour, crystallize at 60°C for 13 hours, filter with suction, wash with carbon dioxide-free water until neutral, dry at 60°C, grind, pass through a 60-80 mesh sieve (177-250 μm), and record it as CaMgAl-LDHs .

[0047] (2) Using the ion exchange method, take 15g CaMgAl-LDHs and 16.2g sodium dodecyl sulfate (SDS) and dissolve them in decarbonated water, stir for 13 hours at room temperature, filter with...

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Abstract

The invention discloses a composite intumescent flame retardant and a preparation method thereof. The composite intumescent flame retardant is composed of 83.33-99.67 wt% of an intumescent flame retardant and 16.67-0.33 wt% of sodium oleate-modified lauryl sodium sulfate intercalated calcium magnesium aluminum hydrotalcite. According to the invention, Ca<2+>, Mg<2+>, Al<3+> and other cations are utilized to perform cation replacement modification on hydrotalcite, dodecyl sulfate and other anions are utilized to perform interlayer intercalation modification on hydrotalcite to expand interlayerspacing and improve the flame retardancy of the hydrotalcite flame retardant, and the hydrotalcite flame retardant is compounded with the intumescent flame retardant to form a synergistic flame-retardant system, so the flame retardancy of the composite flame retardant is improved, and the mechanical property of a polymer added with the flame retardant is also synergistically guaranteed.

Description

technical field [0001] The invention belongs to the field of flame retardant technology, and discloses a composite intumescent flame retardant and its preparation method. Intumescent flame retardants are compounded to form a synergistic flame retardant system. Background technique [0002] With the development of science and technology, the application range of polymer materials is becoming wider and wider, but the flammability of polymer materials has caused many safety accidents and economic losses. Therefore, improving the flame retardancy of polymer materials has become a major topic in the field of safety science and engineering. Traditional halogen-containing flame retardants have the advantages of good flame retardant effect, less added amount, and little impact on the mechanical properties of organic matter, and are widely used in flame retardant polymer materials. However, because most of the halogen-containing flame retardants are toxic and carcinogenic, and rele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K3/26C08K3/32C08K5/053C08K13/04C08L51/04
CPCC08K3/26C08K3/32C08K5/053C08K9/04C08K13/04C08K2003/323C08L2201/02C08L51/04
Inventor 吴唯胡焕波沈辉刘冬梅芮正国
Owner OECHSLER PLASTIC PROD TAICANG
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