Method for preparing core-shell type flame retardant

Abstract

The invention relates to a method for preparing a core-shell type flame retardant. According to the method, the stability of thermal performance of a carbon microsphere is combined aiming at the defects of a flame-retardant property of magnesium hydroxide, and the carbon microsphere is coated by the magnesium hydroxide so as to form a core-shell structure. The method comprises the following steps: preparing a carbon microsphere in a high-pressure heating furnace reaction kettle, preparing an aqueous solution of a silane coupling agent, magnesium hydroxide slurry and a carbon microsphere and ethanol mixed solution, preparing a core-shell type magnesium hydroxide coated carbon microsphere in a water bath heating, stirring and water circulation condensation state in a three-necked flask, washing, filtering, performing vacuum drying and grinding to prepare a nanoscale final product. The preparation method is advanced in process and detailed and accurate in data, the product refers to grey powder particles, the diameter of the particles is less than or equal to 700 nm, the thickness of the coating layer is 15-50 nm, the purity reaches up to 98 percent, and the core-shell type flame retardant is good in flame-retardant effect and high in matching property and can be applied to serving as a flame-retardant material in textile manufacturing, printing and dyeing and high-additional value industries.

Description

technical field [0001] The invention relates to a preparation method of a core-shell flame retardant, belonging to the technical field of preparation and application of inorganic flame retardant materials. Background technique [0002] Fire, fire extinguishing, and flame retardant are difficult problems in the industry. Due to the occurrence of fire accidents, fire extinguishing materials and flame retardants have become indispensable chemical substances. With the development of dripping, nano flame retardants are getting more and more attention. [0003] Magnesium hydroxide in solid flame retardant materials is an excellent flame retardant material, and its powder particles are developing in the direction of miniaturization and nanometerization. As a flame retardant, magnesium hydroxide has the functions of filling, flame retardancy, and smoke suppression, and It is non-toxic and non-corrosive, but magnesium hydroxide is an inorganic substance with poor compatibility, poor...

AI Technical Summary

Problems solved by technology

[0003] Magnesium hydroxide in solid flame retardant materials is an excellent flame retardant material, and its powder particles are developing in the direction of miniaturization and nanometerization. As a flame retardant, magnesium hydroxide has the functions of filling, flame retardancy, and smoke suppression, and It is non-toxic and non-corrosive, but magnesium hydroxide is an inorganic substance with poor compatibility, poor fusion, large amount of addition, and low flame-retardant efficiency. It often occurs in the process of flame-retardant and fire-fighting, so magnesium hydroxide must be treated. Modification can better play its flame retardant performance

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