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

A technology of polypropylene and flame retardants, which is applied in the field of flame retardants and can solve problems such as the flammability of aluminum hypophosphite flame retardants

Active Publication Date: 2021-08-20
JINAN TAIXING FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 135 parts of sodium hypophosphite and 146 parts of aluminum sulfate into the reaction vessel that has been added with water, turn on heating and stirring to raise the temperature to 105°C, keep the constant temperature until completely dissolved; then slowly add the sodium hypophosphite solution Stir and react in the aluminum sulfate solution at 105°C for 6 hours to obtain aluminum hypophosphite slurry;

[0025] (2) Turn off the heating and lower the temperature. When the aluminum hypophosphite slurry cools down to 70°C, add the magnesium hydroxide aqueous dispersion system (add 8 parts of magnesium hydroxide to the water to stir and disperse), and at a constant temperature of 70°C, the magnesium hydroxide and hypophosphorous acid The aluminum slurry is neutralized, and after 4 hours of reaction, it is suction filtered and washed to obtain an aluminum hypophosphite product coated with magnesium hypophosphite and aluminum-magnesium hypophosphite;

[0026] (3) 8 p...

Embodiment 2

[0028] (1) Add 142 parts of sodium hypophosphite and 154 parts of aluminum sulfate into the reaction vessel that has been added with water, turn on heating and stirring to raise the temperature to 115°C, keep the constant temperature until it is completely dissolved; then slowly add the sodium hypophosphite solution Stir and react in the aluminum sulfate solution at 110°C for 4 hours to obtain an aluminum hypophosphite slurry;

[0029] (2) Turn off the heating and lower the temperature. When the aluminum hypophosphite slurry cools down to 80°C, add the magnesium hydroxide water dispersion system (add 9.5 parts of magnesium hydroxide to the water to stir and disperse). The aluminum slurry is neutralized, and after 3 hours of reaction, it is filtered and washed to obtain an aluminum hypophosphite product coated with magnesium hypophosphite and aluminum-magnesium hypophosphite;

[0030] (3) 6.5 parts of coated products of gained, 93.5 parts of polypropylene, 0.02 part of synergis...

Embodiment 3

[0032] (1) Add 126 parts of sodium hypophosphite and 138 parts of aluminum sulfate into the reaction vessel that has been added with water, start heating and stirring to raise the temperature to 95°C, keep the constant temperature until completely dissolved; then slowly add the sodium hypophosphite solution Stir and react in the aluminum sulfate solution at 95°C for 5 hours to obtain an aluminum hypophosphite slurry;

[0033] (2) Turn off the heating and lower the temperature. When the aluminum hypophosphite slurry cools down to 70°C, add the magnesium hydroxide water dispersion system (add 6 parts of magnesium hydroxide to the water and stir to disperse). The aluminum slurry is neutralized, reacted for 2.5 hours, and then filtered and washed to obtain an aluminum hypophosphite product coated with magnesium hypophosphite and aluminum-magnesium hypophosphite;

[0034] (3) 7 parts of coated products of gained, 93 parts of polypropylene, 0.04 part of synergist compound (mass ratio ...

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Abstract

The invention discloses a preparation method and application of an efficient halogen-free flame retardant for polypropylene. According to the invention, aluminum hypophosphite synthesized by sodium hypophosphite and aluminum sulfate is taken as a core material, and a magnesium hypophosphite and magnesium aluminum hypophosphite blend generated by acid-base neutralization reaction of magnesium hydroxide is taken as a capsule material, so that the prepared coated product solves the problem that the aluminum hypophosphite flame retardant is inflammable, and achieves the effect of self-extinguishing when meeting fire. The product is applied to a PP system, a synergistic compound is added, hexaphenoxy cyclotriphosphazene in the synergist is subjected to intercalation treatment, the temperature resistance of the synergistic compound can be improved, the synergistic compound cannot be decomposed under the processing temperature condition, the fluidity is good in the processing process, the matrix compatibility is good, the efficient flame-retardant effect is achieved under the small addition amount, and the transparency and the mechanical property of the PP material are not obviously influenced. The product has the advantages of no halogen, environment friendliness, high flame retardance, high efficiency, migration resistance and the like.

Description

technical field [0001] The invention belongs to the technical field of flame retardants, and in particular 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 light, has excellent mechanical properties, good electrical insulation, and chemical corrosion resistance. 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 easy to burn in case of fire, causing great damage to life and property. At present, the flame retardant of PP materials mainly depends on the halogen flame retardant of bromine antimony, the flame retardant system of phosphorus flame retardant + char forming agent, and the flame retardant system of phosphorus + low halogen components, but bromine antimony flame retar...

Claims

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Application Information

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Patent Type & Authority Applications(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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