| Titre : |
Additives to prevent coating defects caused by film dewetting |
| Type de document : |
texte imprimé |
| Auteurs : |
Jim Reader, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 56-62 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Agents mouillants
Démouillage (chimie des surfaces)
Revêtements -- Additifs
Revêtements -- Défauts
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This paper will compare the advantages and disadvantages of different additive chemistries used to prevent defects caused by dewetting.
Many surface defects, such as fisheyes, edge pull, and retraction are caused when the liquid film dewets after application. Application of the coating by brush, roller, or spray may effectively force wetting and spread the film across the substrate, but defects may form soon after application. There is competition between the hydrodynamic inertia of the applied film and the interfacial tension forces that can cause the coating to dewet or retract.
Additives can be used to prevent these defects by reducing the interfacial forces that drive retraction. However, with many different additives to choose from, that may also cause unwanted side effects, the formulator can find additive selection difficult. This paper will compare the advantages and disadvantages of different additive chemistries used to prevent defects caused by dewetting. |
| Note de contenu : |
- Additives to prevent dewetting defects in coatings
- Table 1 : Comparison of wetting agents : Fundamental properties in water
- Table 2 : Comparison of wetting agents properties |
| En ligne : |
https://drive.google.com/file/d/1CG37ZiUAO2-8T79ZHDfaBNX4u-EEIvW8/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=41092 |
in COATINGS TECH > Vol. 21, N° 3 (05-06/2024) . - p. 56-62
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Additives to prevent coating defects caused by film dewetting in COATINGS TECH, Vol. 21, N° 3 (05-06/2024)
