Perfluorohexanone microcapsules under anhydrous conditions, and preparation method and application thereof

By preparing perfluorohexanone microcapsules under anhydrous conditions and employing oil-in-oil emulsion and interfacial polymerization techniques, the problem of hydrolysis of perfluorohexanone microcapsules at room temperature was solved, thereby improving fire extinguishing efficiency and thermal stability. This method is suitable for the preparation of various fire-resistant products.

CN118059430BActive Publication Date: 2026-07-21SHANGHAI INST OF TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI INST OF TECH
Filing Date
2024-02-22
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing technologies for preparing perfluorohexanone microcapsules are prone to hydrolysis at room temperature, leading to core material loss and reduced fire extinguishing efficiency. Furthermore, their poor thermal stability fails to meet the requirements for stable storage and efficient fire extinguishing.

Method used

Oil-in-oil (O/O) emulsions were prepared under anhydrous conditions, and polyurea wall materials were formed through interfacial polymerization to prepare perfluorohexanone microcapsules. The process included the following steps: mixing perfluorohexanone, aliphatic diisocyanate and methyl nonafluorobutyl ether, adding a compound emulsifier and ultrasonically homogenizing, adding a curing agent to carry out the polymerization reaction, filtering, washing and drying to obtain perfluorohexanone microcapsules.

Benefits of technology

It effectively reduces the hydrolysis problem of perfluorohexanone, reduces core material loss, improves fire extinguishing efficiency, and the core material rupture temperature reaches 250-300℃. It is suitable for the preparation of coatings, fire extinguishing discs and other products, and can be used in places such as computer rooms, transformer boxes and batteries.

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Abstract

The present application relates to a kind of perfluorohexanone microcapsule under anhydrous condition and its preparation method and application.By mixing perfluorohexanone, aliphatic diisocyanate and methyl nonafluorobutyl ether into oil phase mixture uniformly at room temperature, then adding compound emulsifier to prepare oil-in-oil (O / O) emulsion, then interface polymerization is formed polyurea wall material, finally, perfluorohexanone microcapsule is obtained by washing, filtering and drying, and anhydrous system is used in the preparation process.Compared with prior art, the present application prepares perfluorohexanone microcapsule under anhydrous condition, greatly reduces the hydrolysis problem of perfluorohexanone, reduces the loss of core material, and improves the fire extinguishing efficiency.All chemical reactions can occur at room temperature, and the operation is simple, with an embedding rate of 80% to 87%.The prepared microcapsule can be made into paint, fire extinguishing sheet and fire extinguishing blanket, etc.Products are applied to the scene of electrical fire, such as machine room, transformer box and battery.
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