| Titre : |
Keeping on the white track : Optimising the efficiency of titanium dioxide in architectural paints |
| Type de document : |
texte imprimé |
| Auteurs : |
Johan J. Rommens, Auteur ; Steven de Backer, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 88-92 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Dioxyde de titane
Lumière -- Diffusion
Opacifiants
Pigments inorganiques
Réflectance
Revêtements en bâtiment:Peinture en bâtiment
|
| Index. décimale : |
667.2 Colorants et pigments |
| Résumé : |
Optimisation of the scattering efficiency of titanium dioxide can produce considerable cost savings. Ways to measure the efficiency of use of TiO, and to improve it are described. What is referred to as 'highly treated' TiO, can further improve opacity. This in turn can result in lower paint consumption, minimising environ-mental impacts.
One of the main functions of architectural paint is to hide a surface and improve its appearance. Hiding can be obtained either by scattering visible light or by absorbing it. For white paints, absorption is minimised, so that hiding in thin paint films can only be obtained by light scattering. Because of its high refractive index (RI), titanium dioxide (Ti02) is the most efficient pigment for scattering visible light and its lack of absorption in the visible light range makes it the best white pigment available.
Since light scattering is the key parameter controlling hiding in white pain) or whitening strength in tinted paints, more efficient use of Ti02 can lead to improved hiding.
This can reduce the number of paint layers needed for full coverage and hence speed up painting. Fewer paint layers saves costs and raw materials and hence reduces the environmental impact of the paint.
This paper describes how Ti02 efficiency can be assessed and how that knowledge can be used to prioritise hiding optimisation programmes. |
| Note de contenu : |
- Factors influencing hiding power in paints
- Determining the light scattering of paint
- Factors that limit pigment efficiency
- How pigment spacing affects opacity
- A pigment designed to maximise efficiency
- Optimising formulations for opacity |
| En ligne : |
https://drive.google.com/file/d/16RNQNfPO8i6tRMWroDEbaGDdopqwefmD/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23475 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3 (03/2015) . - p. 88-92
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Keeping on the white track in EUROPEAN COATINGS JOURNAL (ECJ), N° 3 (03/2015)
