Journal of Coatings Technology and Research

, Volume 15, Issue 5, pp 993–1002 | Cite as

Structure and surface properties of a novel bulk-matte waterborne polyurethane coating composite

  • Qiwen Yong
  • Bing Liao
  • Guo Ying
  • Liang Caizhen
  • Hao Huang
  • Hao PangEmail author


This paper reports on a novel self-matte or bulk-matte waterborne polyurethane coating composite with inherently extremely low gloss. The coating composite was comprised of a siloxane-containing waterborne polyurethane (SPU) resin and a crosslinked waterborne polyurethane (CPU) resin. The CPU resin was mainly responsible for fabricating the micro-rough surface of the film, which was achieved by a crosslinking reaction between the waterborne polyurethane and bisphenol A-type epoxy E-44 resin. The SPU resin was used to improve the comprehensive properties of the film, which was ascribed to the addition of silane coupling agent KH792. Compared with traditional matte coatings, this coating composite made it possible to avoid high loadings of matting agent and to arrive at highly flexible low-gloss finishes. Gloss levels of as low as a few tenths of a percent, even at high incidence angles, have been achieved with zero loading of extraneous dulling agent. The chemical structures of the SPU and CPU resins were characterized by FTIR-ATR and NMR spectra. The micro-rough topographies and surface rough degrees of the SPU, CPU and their 50%/50% composite films were measured by SEM and MSP, respectively. The particle sizes and particle morphologies of the SPU and CPU resins were imaged by TEM. Finally, the comprehensive properties of the SPU, CPU and their 50%/50% composite resins were evaluated, including the water contact angle, film transparency, tensile strength and storage stability.


Crosslinked waterborne polyurethane Epoxy resin Silane coupling agent Bulk-matte Low gloss Composite film 



This research was supported by Science and Technology Planning Project of Guangdong Province, China (Grant No. 2015A010105001).

Compliance with ethical standard

Conflict of interest

The authors declare no competing financial interest.


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Copyright information

© American Coatings Association 2018

Authors and Affiliations

  • Qiwen Yong
    • 1
    • 2
  • Bing Liao
    • 3
  • Guo Ying
    • 1
    • 2
  • Liang Caizhen
    • 1
    • 2
  • Hao Huang
    • 1
    • 2
  • Hao Pang
    • 1
    Email author
  1. 1.Key Laboratory of Cellulose and Lignocellulosics ChemistryGuangzhou Institute of Chemistry, Chinese Academy of SciencesGuangzhouChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.Guangdong Academy of SciencesGuangzhouChina

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