| Titre : |
It takes effort to look this good : Towards best practice in a snail trail-free exterior architectural paint |
| Type de document : |
texte imprimé |
| Auteurs : |
Pierre Leger, Auteur ; Ashley Gong, Auteur ; Alan Piwowar, Auteur |
| Année de publication : |
2020 |
| Article en page(s) : |
p. 32-37 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Applications extérieures
Lixiviation
Revêtements -- Défauts:Peinture -- Défauts
Revêtements en bâtiment:Peinture en bâtiment
Surfactants
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Snail trail, also referred to as surfactant leaching, is a complicated matter for architectural paint formulators. These coatings demand a high-quality visual appearance but weather conditions and water-soluble ingredients can cause unexpected failuers. This article discusses the three main causes of snail trail and suggests ways to optimise paint formulations and improve drying speed and film formation to limit this issue. |
| Note de contenu : |
- What is snail trail ?
- Drying speed and paint composition influence surfactant leaching
- Three mechanisms determine change in appearance
- Crystal formation
- Pooling of materials
- Colour change
- Composition of exudate
- Importance of film formation
- Possible routes to limit snail trail
- Targeted strategies to reduce snailtrail
- Table 1 : Leachate i water analysis (HPLC-ELSD) and surfactant leaching ratings
- Fig. 1 : Factors influencing snail trail
- Fig. 2 : Optical image showing snail trails from a white paint onto a black substrate and scanning electron micrographs showing two different types of crystal formation
- Fig. 3 : Optical image of a paint surface after a drop of water evaporated, scanning electron micrograph of the optical impage highlighting a concentration of inorganic material (dark regions) near the edge of the droplet and 2D molecular representation of the droplet by ToF-SIMS showcasing an enrichment of exudate at the edge of the droplet |
| En ligne : |
https://drive.google.com/file/d/1jS-kOCfzuiVFp3v26Ych7pcqNVSvjYuz/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33896 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 3 (03/2020) . - p. 32-37
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