High opacity TiO2-free white coatings

  • One of the functions of a coating is to cover the substrate (such as masonry, plaster, wood or metal) on which it is applied so there is a need for good opacity in a coating 
  • White is the predominant color in current coatings so there is a need for routes to white coatings 
  • Currently these needs are met using pigmentary TiO2, but this material has a high carbon footprint which unacceptably impacts on the carbon footprint of the final coating 
  • Solutions to this problem need to be compatible with the polymer binders currently used in coatings such as acrylic, vinyl or styrene copolymers 
  • Solutions need to be hard wearing and durable in both inside and exterior environments 
  • Solutions could be through the traditional inorganic mineral-based materials or synthetic-based materials 
  • New ways to deliver opacity and/or white in coatings are also of interest

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