Journal of Coatings Technology and Research

, Volume 15, Issue 6, pp 1283–1292 | Cite as

Preparation and properties of waterborne polyurethane modified by stearyl acrylate for water repellents

  • Lixia Sheng
  • Xuetong Zhang
  • Zhen GeEmail author
  • Zhu Liang
  • Xiaoli Liu
  • Chunpeng Chai
  • Yunjun LuoEmail author


Double bond end-capped waterborne polyurethane (DWPU) was synthesized from toluene diisocyanate, hydroxypropyl polysiloxane, trimethylolpropane, N-methyldiethanolamine, and hydroxyethyl acrylate. Then water repellents with long-chain hydrophobic alkyl structure were obtained by radical copolymerization of stearyl acrylate (SA) and DWPU. The waterproofing performance and other properties of the water repellents were studied for different SA contents. The results showed that, for the water repellent with SA content of 50 wt%, the water absorption of the film reduced to 4.29% while the water contact angle of fabric coated by the water repellent rose to 141.5°. In addition, the optimum SA content of the water repellent was 40%, achieving the highest score of 85 points in the waterproof performance evaluation.


Stearyl acrylate Water repellent Waterborne polyurethane Preparation 


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Copyright information

© American Coatings Association 2018

Authors and Affiliations

  1. 1.School of Material Science and EngineeringBeijing Institute of TechnologyBeijingChina

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