A benzotriazole polyurea microcapsule emulsion, a preparation method and applications thereof
By preparing benzotriazole-based polyurea microcapsule emulsions, the problems of easy migration and poor washability of benzotriazole-based UV absorbers in textile fabrics were solved, achieving high stability and long-lasting UV protection, and improving the washability and hand feel of the fabrics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGDONG HONGHAO CHEM CO LTD
- Filing Date
- 2026-04-08
- Publication Date
- 2026-07-17
AI Technical Summary
Among existing UV-resistant finishing agents for textile fabrics, benzotriazole UV absorbers are prone to migration and have poor wash resistance, resulting in a rapid decline in UV resistance. Furthermore, existing microencapsulation technology has insufficient mechanical strength and poor density, making it impossible to achieve long-term protection.
Benzotriazole compounds were used as the core material, and isoflurane diisocyanate and ethylenediamine were used as the wall material. Benzotriazole polyurea microcapsule emulsions were prepared by interfacial polymerization. PEG-400 was used as a dispersant to control the particle size to 1~5μm, forming highly dense and mechanically stable microcapsules. Waterborne polyurethane adhesives were then used for textile finishing.
The stability and washability of the microcapsule emulsion are improved, ensuring long-lasting UV protection. The microcapsules are evenly attached to the fabric surface, enhancing the fabric's UV protection durability and softness, avoiding the defects of stiffness and poor breathability in existing technologies.
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