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Smart Polymer Nanoparticles for High-Performance Water-Based Coatings

  • José Paulo S. FarinhaEmail author
  • Susana Piçarra
  • Carlos Baleizão
  • J. M. G. Martinho
Chapter

Abstract

The increasing pressure to reduce the use of volatile organic compounds (VOCs) within the coatings industry has led to the development of waterborne systems. Water-dispersed polymer nanoparticles (i.e., latex) have been successfully used to this end, but the resulting films usually present less strength, hardness, and resistance to chemicals than solvent-borne coatings. A method to enhance the properties of these films is through chemical polymer chain cross-linking when the film is formed. This approach requires a careful balance of the cross-linking reaction rate and the polymer diffusion rate across the initial nanoparticle boundaries, and it has been extensively studied and used in industrial coatings. Herein, waterborne coatings based on reactive polymer nanoparticles and the first attempts to use “smart” polymer nanoparticles where the cross-linking is triggered by a stimulus which occurs after the desired extent of interdiffusion are reviewed. Different types of cross-linking that have the potential to be used in smart waterborne coatings, involving functional groups such as alkoxysilanes, carboxylic acids, carbodiimide, aziridine, isocyanates, and polyols, where the trigger can be a change in pH, temperature, or water content, are also discussed.

Keywords

Waterborne coatings Reactive latex Smart nanoparticles Polymer dispersions 

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Copyright information

© Springer International Publishing Switzerland 2016

Authors and Affiliations

  • José Paulo S. Farinha
    • 1
    Email author
  • Susana Piçarra
    • 2
  • Carlos Baleizão
    • 1
  • J. M. G. Martinho
    • 1
  1. 1.Centro de Química-Física MolecularIN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, University of LisbonLisboaPortugal
  2. 2.Escola Superior de Tecnologia de Setúbal, Instituto Politécnico de SetúbalSetúbalPortugal

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