| Titre : |
Evaluation of glass bubbles for solar heat reflection in waterborne acrylic elastomeric roof coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Kevin Rink, Auteur ; Andrea Charif Rodriguez, Auteur |
| Année de publication : |
2016 |
| Article en page(s) : |
p. 40-48 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Charges (matériaux)
Chlorure de polyvinyle
Economies d'énergie
Elastomères
Essais accélérés (technologie)
Formulation (Génie chimique)
Polyacryliques
Réflectivité thermique
Revêtements:Peinture
Sphères creuses
Verre
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In this study, all of the white paints generally exhibit industry acceptable initial solar reflectance index values,2 and thus offer varying degrees of potential savings over a black roof baseline. Paints made with glass bubbles offered the highest degree of potential energy savings based on the fillers studied in this experiment. This study does not take into account the other parameters that qualify an acceptable elastomeric roof coating such as elongation, water resistance, etc. Final formulations need to be tested for ail specified properties to determine final acceptante per customer specifications. New studies have suggested maintaining certain minimum SRI values after actual outdoor weathering intervals. These and other studies such as the impact of glass bubbles on the solar reflectance of colored paints may form the basis for future studies. The white elastomeric paints in this study target low sloped roofs such as those utilized in industrial applications. Higher sloped roofs using other colors for residential applications could potentially benefit from these same materials.
White elastomeric waterborne acrylic roof coatings made with glass bubbles can offer formulators an alternative to other conventional fillers used in these coatings. The smaller glass bubbles offer increased solar reflectance and thermal advantages, which in turn could result in energy savings. The smaller bubbles also offer higher strength which could be beneficial for higher pressure applications such as airless spraying. In addition, the smaller bubbles yield a smoother appearance and good dirt pick-up resistance. The magnitude of these benefits needs to be evaluated by each formulator for their particular application and formulation. |
| Note de contenu : |
- Opacity, gloss, and thickness
- Solar reflectance
- Thermal emittance test
- Infrared heat lamp test
- GB3 loading (PVC) study
- Accelerated weathering studies
- Additional experiment : using glass bubbles as a post-addition additive
- Energy savings |
| En ligne : |
https://drive.google.com/file/d/1wrJfZjtAQkhR7SxdqkAdAKT6xNW9AyET/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=27048 |
in COATINGS TECH > Vol. 13, N° 9 (09/2016) . - p. 40-48
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