Polymer Bulletin

, Volume 74, Issue 4, pp 1061–1076 | Cite as

Synthesis and surface analysis of self-matt coating based on waterborne polyurethane resin and study on the matt mechanism

  • Qiwen Yong
  • Fuwei Nian
  • Bing Liao
  • Ying Guo
  • Liping Huang
  • Lu Wang
  • Hao Pang
Original Paper
First Online:
Received:
Revised:
Accepted:

Abstract

Self-matt coating of waterborne polyurethane (WBPU) was synthesized by combining prepolymer and self-emulsification methods. The emulsion was fabricated from both hydroxy carboxylic acid and aminosulfonic acid types of hydrophilic chain-extending agents, in which the 2-[(2-aminoethyl) amino] ethane sulphonate sodium (AAS salt) was produced in laboratory. This emulsion demonstrated an excellent matt performance without the addition of extra matting agents after filming. Four different kinds of surface properties were measured on the film: the specular gloss (60° gloss meter), the contact angle (CA), the surface roughness degree (3D Surface Profilometer), and the topography of the coatings surface (SEM). The results showed that tons of spherical particles with diameter in a few micrometers were aggregated on the film surface. The effect of the roughness parameters (R a and R q ) and the average particle size of the emulsions on the specular gloss degree were probed. The research indicated that the emulsion with average particle size in the range of 2.5–3.0 µm and, meanwhile, the film with roughness parameters R a and R q both greater than 1 µm could attain the best matt effect. The WBPU emulsions showed good physical and mechanical properties, and were introduced into wood varnish for matting purpose.

Keywords

Aminosulfonic acid Waterborne polyurethane Self-matt Surface roughness Specular gloss Matt mechanism 
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Notes

Acknowledgments

The project was funded by the State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, China.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Qiwen Yong
    • 1
    • 2
  • Fuwei Nian
    • 1
    • 4
  • Bing Liao
    • 3
  • Ying Guo
    • 1
    • 2
  • Liping Huang
    • 1
    • 2
  • Lu Wang
    • 1
    • 2
  • Hao Pang
    • 1
    • 4
  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
  4. 4.Guangzhou Green Building Materials Academy, Guangzhou Institute of Chemistry, Chinese Academy of SciencesGuangzhouChina

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