| Titre : |
Multifunctional superwetting agent for coating applications |
| Type de document : |
texte imprimé |
| Auteurs : |
Vimal Saini, Auteur ; Wolfgang Fuchs, Auteur ; Elke Piron, Auteur ; Carlos Feito, Auteur ; Udo Schonhoff, Auteur ; Frank Abschlag, Auteur |
| Année de publication : |
2019 |
| Article en page(s) : |
p. 15-20 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents mouillants
Angle de contact
Formulation (Génie chimique)
Polyacryliques
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Tension superficielle
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Wetting agents are added to waterborne coatings in order to increase the wetting of the substrate and to improve the compatibility with pigments and other components. Selection of the suitable wetting agent for desired formulation and application properties is critical. For example, anionic wetting agents can have excellent dynamic surface tension control but can often result in an increase in the foaminess of the grind that may appear as microfoam in the applied coating. Low foaming nonionic wetting agents have found value in industrial coatings, where microfoam cannot be tolerated however, they do not provide adequate surface tension control.
To overcome these limitations, a new low foaming, silicon and APEO free multifunctional wetting agent has been developed (SUPREAD® 2059). It provides antifoaming properties, as well as offering fast dynamic surface tension reduction for improved flow and levelling on difficult to wet surfaces like wood, plastics etc. The newly developed multifunctional wetting agent was tested in various coating formulations. The results of the study reveals its outstanding ability in surface wetting, antifoaming, pore filling on wood, block resistance and has shown no negative impact on gloss or rheology. |
| Note de contenu : |
- BASICS OF WETTING
- CHALLENGES IN WATERBORNE COATINGS : Sample examined - Surface tension - Contact angle - Foaming behaviour
- EVALUATION IN CLEAR COAT BASED ON ACRYLIC DISPERSION
- EVALUATION IN WHITE WOOD COATING BASED ON SELF6CROSSLINKING ACRYLIC DISPERSION : Improved surface wetting - Block resistance - Pore filing ability - Overall performance comparison - Substrate wettability in OPV ink and adhesive system
- Fig. 1 : Illustration of contact angles formed by sessile liquid drops on a smooth homogeneous surface
- Fig. 2 : Static surface tension comparison of aqueous solutions containing 0.3wt% wetting agent
- Fig. 3 : Evolution of advancing contact angle with 0.3% aqueous solutions of wetting agents a) in glass substrate and b) on untreated polypropylene plastic
- Fig. 4 : Foaming behaviour with the Skandex shaker
- Fig. 5 : Rheograms of the clear coat
- Fig. 6 : Brush applied clear coat on Lenata chart
- Fig. 7 : Wetting performance in white wood coating based on self-crosslinking acrylic dispersion Brush applied clear coat on Lenata chart
- Fig. 8 : Improved block resistance with Supread® 2059
- Fig. 9 : Pore filling ability via spray application (Scale in all samples -1mm (only except Reference 3-3mm)
- Fig. 10 : Surface wettability comparison with 0.3% Supread® 2059 al In OPV system on PVC wallpaper bl BOPP film
- Table 1 : Samples examined
- Table 2 : Application properties of clear coat based with different wetting agents
- Table 3 : Overall application performance comparison
- Table 4 : Transparent clear coat based on acrylic dispersion
- Table 5 : Based on self-crosslinking acrylic dispersion
- Table 6 : White window paint test formulation |
| En ligne : |
https://drive.google.com/file/d/16NX56HuRVYQUKgsuozi6IysnzQju6B6v/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33395 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 209, N° 4657 (12/2019) . - p. 15-20
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