Polyurea reinforced epoxy resin anticorrosive and wear-resistant coating for high-speed train

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By introducing polyurea nanofibers into the epoxy resin coating, the problem of easy wear and corrosion of traditional coatings in harsh environments is solved, achieving efficient protection of the aluminum alloy substrate and improving the corrosion resistance and wear resistance of the coating.

CN116971050BActive Publication Date: 2026-04-21CRRC QINGDAO SIFANG CO LTD

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Patent Information

Application Number: CN202310862145.1
Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner
Filing Date: 2023-07-13
Publication Date: 2026-04-21
Estimated Expiration: 2043-07-13

Application Information

Patent Timeline

13 Jul 2023

Application

CN202310862145.1

21 Apr 2026

Publication

CN116971050B

IPC: D01F6/72; C09D163/00; C09D5/08; C09D7/65

CPC: D01F6/72; C09D163/00; C09D5/08; C09D7/65; C09D7/70; C08L75/02

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Application Domain

Monocomponent polyureas artificial filamentAnti-corrosive paints

Technology Topics

Epoxy Polymer science

Technical Efficacy Phrases

Good dispersion evenly distributed

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AI Technical Summary

Technical Problem

Traditional coatings are prone to wear and corrosion in harsh environments such as high-speed trains, and cannot effectively protect the aluminum alloy substrate, leading to surface defects and safety hazards.

Method used

A polyurea nanofiber-reinforced epoxy resin composite coating was developed. Polyurea nanofibers were prepared by addition polymerization and then mixed with an epoxy resin matrix to form a continuously reinforced interface to improve corrosion resistance and wear resistance.

Benefits of technology

It significantly enhances the coating's corrosion resistance and abrasion resistance, reduces wear rate, and provides long-lasting protection.

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Abstract

The present application relates to anticorrosive wear-resistant coating, and in particular to polyurea reinforced epoxy resin anticorrosive wear-resistant coating for high-speed train. The epoxy resin anticorrosive wear-resistant coating contains polyurea nanofiber, which is obtained by addition polymerization with diisocyanate and diamine as raw materials. The polyurea nanofiber has continuous reinforcing interface and high dispersibility, and can significantly enhance the corrosion resistance and wear resistance of traditional epoxy resin within a certain mass ratio range.

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