A microcapsule, its preparation method and application

By employing a three-level spherical microcapsule structure and a three-step interfacial polymerization method, the problem of co-loading and intelligent release of multipolar active substances was solved, achieving a four-in-one effect of antiviral, antibacterial, antifungal, and anti-mite properties, while improving the mechanical strength and service life of the microcapsules.

CN122298305APending Publication Date: 2026-06-30JIANGSU BAIYOU NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU BAIYOU NEW MATERIAL TECH CO LTD
Filing Date
2026-04-30
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing microcapsule technology has difficulty simultaneously and efficiently co-loading multipolar active substances and achieving intelligent time-sequential release, resulting in uneven functional distribution, poor stability, and mutual interference in release, making it impossible to achieve complete protection with four effects in one.

Method used

The microcapsule design employs a three-tiered spherical structure, including a core layer, a shell layer, and a satellite layer. The core layer contains hydrophobic active ingredients, the shell layer is formed by cross-linked polyurethane-polyurea, and the satellite layer is composed of nanoparticles or molecular clusters. The addition of components is precisely controlled through a three-step interfacial polymerization method, achieving efficient co-loading and cascade release of multipolar active substances.

Benefits of technology

It achieves the integration of four major functions: antiviral, antibacterial, antimildew, and antimite. The shell's mechanical strength is enhanced, the satellite layer has improved washability, the product has a long service life, the release process is intelligent, and the protection spectrum is complete.

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Abstract

This invention discloses a microcapsule, its preparation method, and its applications, belonging to the field of bioprotective materials. The microcapsule has a tertiary spherical or near-spherical particle structure, including a core layer, a shell layer covering the core layer, and satellite layers anchored to the outer surface of the shell layer. The core layer includes an active ingredient and a hydrophobic carrier medium. The shell layer is a cross-linked polyurethane-polyurea wall material formed by interfacial polymerization of polyisocyanate and polyols or polyamines containing hydrophilic segments. The satellite layers include active units and bridging and stabilizing units. The active units include benzalkonium chloride or benzyl chloride. The satellite layers exist in the form of nanoparticles or molecular clusters with a size of 10-150 nm. This invention, applied to bioprotective materials, solves the problem of efficient co-loading and intelligent sequential release of multipolar active substances in existing microcapsules. It possesses antiviral, antibacterial, antifungal, and anti-mite functions, a long service life, and features controllable and reproducible processes.
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Citation Information

Patent Citations

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