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Preparation method and application of high-efficiency halogen-free flame retardant for polypropylene

A technology of flame retardant and polypropylene, which is applied in the field of flame retardants, can solve the problems of aluminum hypophosphite flame retardants being flammable, and achieve the effects of good matrix compatibility, increased flame retardant effect, and mild reaction conditions

Active Publication Date: 2022-06-24
JINAN TAIXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention uses sodium hypophosphite and aluminum hypophosphite synthesized by aluminum sulfate as the core material, magnesium hypophosphite and aluminum-magnesium sulfoxylate blends generated by the acid-base neutralization reaction of magnesium hydroxide as the capsule material, and the coated product prepared solves the problem of The aluminum hypophosphite flame retardant itself is flammable and achieves the effect of self-extinguishing in case of fire

Method used

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  • Preparation method and application of high-efficiency halogen-free flame retardant for polypropylene
  • Preparation method and application of high-efficiency halogen-free flame retardant for polypropylene

Examples

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Effect test

Embodiment 1

[0024] (1) 135 parts of sodium hypophosphite and 146 parts of aluminum sulfate were added to the reaction vessel that had been added to the water respectively, and the heating and stirring were turned on to be warmed up to 105 ° C, and a constant temperature was maintained until it was completely dissolved; then the sodium hypophosphite solution was slowly added In the aluminum sulfate solution, the reaction was stirred at 105 °C for 6 h to obtain aluminum hypophosphite slurry;

[0025] (2) Turn off the heating to cool down, add magnesium hydroxide water dispersion system when the aluminum hypophosphite slurry is cooled to 70 ℃ (add 8 parts of magnesium hydroxide to water and stir and disperse), and at a constant temperature of 70 ℃, magnesium hydroxide and hypophosphorous acid are added. The aluminum slurry is neutralized and washed with suction after 4 hours of reaction to obtain an aluminum hypophosphite product co-coated with magnesium hypophosphite and aluminum magnesium h...

Embodiment 2

[0028] (1) 142 parts of sodium hypophosphite and 154 parts of aluminum sulfate were added to the reaction vessel that had been added to the water respectively, and the heating and stirring were turned on to be warmed up to 115 ° C, and a constant temperature was maintained to be completely dissolved; then the sodium hypophosphite solution was slowly added In the aluminum sulfate solution, the reaction was stirred at 110 °C for 4 h to obtain aluminum hypophosphite slurry;

[0029] (2) Turn off the heating to cool down, add magnesium hydroxide water dispersion system (9.5 parts of magnesium hydroxide is added to water and stir and disperse) when the aluminum hypophosphite slurry is cooled to 80°C, and magnesium hydroxide and hypophosphorous acid are added at a constant temperature of 75°C. The aluminum slurry is neutralized and washed with suction after 3 hours of reaction to obtain an aluminum hypophosphite product co-coated with magnesium hypophosphite and aluminum magnesium hy...

Embodiment 3

[0032] (1) 126 parts of sodium hypophosphite and 138 parts of aluminum sulfate were added into the reaction vessel that had been added to water respectively, and the heating and stirring were turned on to be warmed up to 95 ℃, and the constant temperature was kept to be completely dissolved; then the sodium hypophosphite solution was slowly added In the aluminum sulfate solution, the reaction was stirred at 95 °C for 5 h to obtain aluminum hypophosphite slurry;

[0033] (2) turn off the heating to cool down, add magnesium hydroxide water dispersion system when the aluminum hypophosphite slurry is cooled to 70 ℃ (add 6 parts of magnesium hydroxide to the water and stir and disperse), and at a constant temperature of 80 ℃, magnesium hydroxide and hypophosphorous acid are added. The aluminum slurry is neutralized, and after 2.5 hours of reaction, suction filtration and washing are performed to obtain an aluminum hypophosphite product co-coated with magnesium hypophosphite and alum...

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Abstract

The invention discloses a preparation method and application of a high-efficiency halogen-free flame retardant for polypropylene. The invention uses sodium hypophosphite and aluminum hypophosphite synthesized by aluminum sulfate as the core material, magnesium hypophosphite and aluminum-magnesium sulfoxylate blends generated by the acid-base neutralization reaction of magnesium hydroxide as the capsule material, and the coated product prepared solves the problem of The aluminum hypophosphite flame retardant itself is flammable, and it achieves the effect of self-extinguishing in case of fire. The product is applied to the PP system and added with a synergistic compound. The hexaphenoxycyclotriphosphazene in the synergist is intercalated to improve the temperature resistance of the synergistic compound so that it will not occur under the processing temperature. Decomposition, it has good fluidity and matrix compatibility during processing, and achieves high-efficiency flame retardant effect with a small amount of addition, and has no obvious impact on the transparency and mechanical properties of the PP material itself. The product of the invention has the advantages of halogen-free environmental protection, high efficiency of flame retardancy, anti-migration and the like.

Description

technical field [0001] The invention belongs to the technical field of flame retardants, and particularly relates to a preparation method and application of a high-efficiency halogen-free flame retardant for polypropylene. Background technique [0002] Polypropylene (PP) is non-toxic and lightweight, has excellent mechanical properties, good electrical insulation, and is resistant to chemical corrosion. It is widely used in packaging, textiles, building materials, automobiles, electronics / electrical, office supplies and other fields. However, due to its own structure, the oxygen index of PP is only about 17.4%, and it is very easy to burn in case of fire, causing great harm to life and property. At present, the flame retardant of PP materials mainly relies on bromine-antimony halogen flame retardant, phosphorus-based flame retardant + char-forming agent flame retardant system, and phosphorus-based + low-halogen component flame retardant system, but bromine-antimony flame ret...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K3/32C08L23/12C08K13/06C08K5/5399C08K5/14C08K5/01
CPCC08K9/10C08K3/32C08K13/06C08K5/5399C08K5/14C08K5/01C08L2201/02C08L2201/22C08L23/12
Inventor 王鲁静徐亮肖学文索伟王艳辉段金凤刘婷徐有敏宋传君
Owner JINAN TAIXING FINE CHEM
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