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Nitrogen and phosphorus-containing hydrotalcite-based flame retardant and preparation method thereof

A talc-based, flame retardant technology, applied in the field of flame retardants, can solve problems affecting the physical and mechanical properties and processing properties of polymers

Active Publication Date: 2021-05-18
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In flame retardant applications, in order to achieve excellent flame retardant effects, it is necessary to add a large amount of LDHs to the polymer, and such addition and agglomeration will seriously affect the physical and mechanical properties and processing properties of the polymer

Method used

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  • Nitrogen and phosphorus-containing hydrotalcite-based flame retardant and preparation method thereof
  • Nitrogen and phosphorus-containing hydrotalcite-based flame retardant and preparation method thereof
  • Nitrogen and phosphorus-containing hydrotalcite-based flame retardant and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] Nitrogen-containing phosphorus hydrotalcite-based flame retardant, including the following raw materials: magnesium aluminum hydrotalcite 0.3g, nitrogen-containing monomer melamine (MEL) 0.5g, sodium hydroxide 0.75g and phosphorus-containing monomer phytic acid (PA) 2mL; , the mass ratio of hydrotalcite, nitrogen-containing monomer, sodium hydroxide and phosphorus-containing monomer is 1:1.7:2.5:9.1;

[0039] Among them, the hydrotalcite is magnesium aluminum hydrotalcite, including the following raw materials: magnesium salt Mg(NO 3 ) 2 ·6H 2 O 13.2313g, aluminum salt Al(NO 3 ) 3 9H 2 O 9.5388g and urea 15.0859g; ie, Mg in magnesium salt 2+ Al with aluminum salt 3+ The molar ratio is 2:1, Mg in magnesium salt 2+ and Al in aluminum salt 3+The ratio of the sum of the moles of urea to the moles of urea is 1:3.3;

[0040] The preparation method of the above-mentioned nitrogen-containing phosphorus hydrotalcite-based flame retardant, the synthesis schematic diagram...

Embodiment 2

[0047] Nitrogen-containing phosphorus hydrotalcite-based flame retardant, including the following raw materials: magnesium aluminum hydrotalcite 0.3g, nitrogen-containing monomer melamine (MEL) 0.75g, sodium hydroxide 0.75g and phosphorus-containing monomer phytic acid (PA) 2mL; , the mass ratio of hydrotalcite, nitrogen-containing monomer, sodium hydroxide and phosphorus-containing monomer is 1:2.5:2.5:9.1;

[0048] Among them, the hydrotalcite is magnesium aluminum hydrotalcite, including the following raw materials: magnesium salt Mg(NO 3 ) 2 ·6H 2 O 13.2313g, aluminum salt Al(NO 3 ) 3 9H 2 O 9.5388g and urea 15.0859g; ie, Mg in magnesium salt 2+ Al with aluminum salt 3+ The molar ratio is 2:1, Mg in magnesium salt 2+ and Al in aluminum salt 3+ The ratio of the sum of the moles of urea to the moles of urea is 1:3.3;

[0049] The preparation method of the above-mentioned nitrogen-containing phosphorus hydrotalcite-based flame retardant, the synthesis schematic diagr...

Embodiment 3

[0056] Nitrogen-containing phosphorus hydrotalcite-based flame retardant, including the following raw materials: magnesium aluminum hydrotalcite 0.3g, nitrogen-containing monomer melamine (MEL) 0.75g, sodium hydroxide 1.2g and phosphorus-containing monomer phytic acid (PA) 2mL; , the mass ratio of hydrotalcite, nitrogen-containing monomer, sodium hydroxide and phosphorus-containing monomer is 1:2.5:4:9.1;

[0057] Among them, the hydrotalcite is magnesium aluminum hydrotalcite, including the following raw materials: magnesium salt Mg(NO 3 ) 2 ·6H 2 O 13.2313g, aluminum salt Al(NO 3 ) 3 9H 2 O 9.5388g and urea 15.0859g; ie, Mg in magnesium salt 2+ Al with aluminum salt 3+ The molar ratio is 2:1, Mg in magnesium salt 2+ and Al in aluminum salt 3+ The ratio of the sum of the moles of urea to the moles of urea is 1:3.3;

[0058] The preparation method of the above-mentioned nitrogen-containing phosphorus hydrotalcite-based flame retardant, the synthesis schematic diagram ...

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Abstract

The invention discloses a nitrogen and phosphorus-containing hydrotalcite-based flame retardant, which comprises the following raw materials: hydrotalcite, a nitrogen-containing monomer, sodium hydroxide and a phosphorus-containing monomer. The preparation method comprises the following steps: (1) weighing the raw materials; (2) ultrasonically dispersing hydrotalcite and a nitrogen-containing monomer in deionized water for later use; (3) ultrasonically dispersing sodium hydroxide and a phosphorus-containing monomer into deionized water; and (4) dropwise adding the phosphorus-containing monomer alkali liquor into the hydrotalcite suspension under the condition of magnetic stirring, and carrying out heating reaction, then performing filtration, vacuum drying and grinding to obtain the phosphorus-containing hydrotalcite. The phosphorus-containing monomer and the nitrogen-containing monomer are introduced into a hydrotalcite system, so that the advantages of biomass and hydrotalcite can be combined; therefore, the organic-inorganic hybridized flame retardant is obtained and is applied to a polymer matrix, wherein the defect that the adding amount of hydrotalcite is large is overcome, and the flame retardant has important significance on polymer flame retardance.

Description

technical field [0001] The invention relates to the technical field of flame retardants, in particular to a nitrogen-containing phosphorus hydrotalcite-based flame retardant and a preparation method thereof. Background technique [0002] Flame retardants refer to functional additives that impart flame retardancy to flammable polymers. They are mainly designed for the flame retardant of polymer materials. They are divided into additive flame retardants and reactive flame retardants according to the method of use. Among them, the additive flame retardant is added to the polymer by mechanical mixing to make it flame retardant, and has a wide range of applications. At present, the additive flame retardant mainly includes organic flame retardants and inorganic flame retardants. Flame retardants (organic chlorides and organic bromides) and non-halogenated flame retardants. [0003] Hydrotalcite (LDHs) is a cationic layered compound without a fixed chemical composition. The type a...

Claims

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Application Information

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IPC IPC(8): C08K9/10C08K9/04C08K3/26
CPCC08K9/10C08K9/08C08K3/26
Inventor 徐圣胡杰曾虹燕田贤曜吴昆颜文娟钟承志郭一卉马嘉欣王晗
Owner XIANGTAN UNIV
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