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<p>Due to the high frequency of utilization, visible accessories installed in high-speed EMUs sets may experience surface cracking, aging, and damage. Surface repair coatings are commonly used materials for repairing damaged high-speed EMUs interiors. However, traditional surface repair materials still have problems such as poor film-forming properties, insufficient anti-slip performance, and poor flame retardancy. This work synthesized modified waterborne acrylic resin with core-shell structure through grafting modification, and prepared high-performance modified surface repair materials. The adhesion level of the modified surface repair coating reaches level 1, with a friction coefficient of 0.7. In addition, it also exhibits good flame-retardant performance: the oxygen index test result is 31.8%, and the cigarette resistance level can reach level 4. The repair results of different interiors show that the material has a good repair effect and is universal.</p> Graphical abstract <p></p>

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Core-shell modified waterborne acrylic coatings for high-performance surface repair of high-speed EMU interiors

  • 期刊论文

  • 发表日期：

    2025年11月24日

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  • Xiaofei Xing,
  • Chenchen Mao,
  • Yingbin Zhuang,
  • Jingcun Zhao,
  • Yu Ding,
  • Lei Ji,
  • Chao Guo,
  • Kuixiong Niu,
  • Hao Li,
  • Chuanyi Gao,
  • Kuo He,
  • Zhijun Huang,
  • Rui Lan,
  • Yu Qi,
  • Dejun Ye,
  • Xin Wang

摘要

Due to the high frequency of utilization, visible accessories installed in high-speed EMUs sets may experience surface cracking, aging, and damage. Surface repair coatings are commonly used materials for repairing damaged high-speed EMUs interiors. However, traditional surface repair materials still have problems such as poor film-forming properties, insufficient anti-slip performance, and poor flame retardancy. This work synthesized modified waterborne acrylic resin with core-shell structure through grafting modification, and prepared high-performance modified surface repair materials. The adhesion level of the modified surface repair coating reaches level 1, with a friction coefficient of 0.7. In addition, it also exhibits good flame-retardant performance: the oxygen index test result is 31.8%, and the cigarette resistance level can reach level 4. The repair results of different interiors show that the material has a good repair effect and is universal.

Graphical abstract