High-performance antibacterial polyurea coating and preparation method thereof

By combining modified nano zinc oxide and lignin-grafted polyetheramine with aliphatic isocyanate, the antibacterial and UV resistance problems of traditional polyurea coatings are solved, improving antibacterial, anti-yellowing and UV resistance properties, and enhancing the flexibility and adhesion of the coating.

CN122104020APending Publication Date: 2026-05-29ZHEJIANG CHANGSHAN JINFENG POLYESTER POLYMER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG CHANGSHAN JINFENG POLYESTER POLYMER CO LTD
Filing Date
2026-02-09
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Traditional polyurea coatings lack inherent antibacterial properties, are prone to microbial growth, and undergo oxidative degradation under ultraviolet irradiation, leading to yellowing and decreased gloss, thus failing to meet the requirements for high-performance antibacterial and UV-resistant coatings.

Method used

Quaternized ammonium modified nano zinc oxide and lignin-grafted polyetheramine combined with aliphatic isocyanate are used to improve the dispersibility and antibacterial strength of nano zinc oxide and introduce fluorine-containing segments to enhance antibacterial and UV resistance properties while maintaining mechanical stability.

Benefits of technology

It achieves highly effective antibacterial properties against Escherichia coli and Staphylococcus aureus, reduces yellowing and gloss loss, improves the flexibility and adhesion of the coating, and extends its service life.

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Abstract

The application provides a high-performance antibacterial polyurea coating and a preparation method thereof. The polyurea coating comprises the following components in parts by weight: 40-60 parts of isocyanate, 30-50 parts of polyether amine, 5-10 parts of lignin grafted polyether amine, 0.5-2 parts of dispersing agent, 10-20 parts of chain extender, 0.2-1 part of defoaming agent and 1-3 parts of modified nano zinc oxide. The polyurea coating prepared by the application has good antibacterial property to escherichia coli, staphylococcus aureus and the like, low yellowing value, low light loss rate, excellent anti-yellowing and anti-ultraviolet properties, no coating damage after high-impact test, and excellent mechanical stability.
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