| Titre : |
The reengineering of wetting and dispersing |
| Type de document : |
texte imprimé |
| Auteurs : |
Edward W. Orr, Auteur |
| Année de publication : |
1996 |
| Article en page(s) : |
p. 828-835 |
| Langues : |
Anglais (eng) |
| Catégories : |
Formulation (Génie chimique)
Revêtements en phase aqueuse:Peinture en phase aqueuse
|
| Tags : |
'Peinture phase aqueuse' Formulation Pigment Mouillage Dispersion Floculation Défloculation 'Répulsion électrostatique' 'Encombrement stérique' |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Environmentally friendly coatings pose multiple technological and cost-containment challenges. As a result, new wetting and dispersing technologies which simultaneously enhance performance and reduce costs have gained in importance. An in-depth discussion of the above crucial issues will be presented. Key words are : wetting vs. dispersing, deflocculation, controlled flocculation, reengineering, pigment concentrates, usage levels, points of addition, formulation hints. New, multifunctional polymeric additives for resin-free pigment concentrates and new additive structures to enhance performance in aqueous and high solids systems will also be presented. |
| Note de contenu : |
- Wetting versus dispersing : What's the difference ? - The wetting phenomenon; distinctive features - The dispersing phenomenon : distinctive features - Electrostatic repulsion - Steric hindrance
- Deflocculation: how and why ?
- Controlled flocculation: how and why ? - Special considerations in aqueous systems - Pigment charge
- The reengineering of wetting and dispersing
- Less cost and more performance - Pigments - Grinding resins - Solvents - Additives
- Usage levels, points of addition, and practical formulaion hints - Determining the appropriate usage level : initial considerations - Point of addition/order of addition - Single grinds and co-grinds - Rheological additive combinations - The possible side-effects of wetting and dispersing additives |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11384 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 11/96 (11/1996) . - p. 828-835
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The reengineering of wetting and dispersing in EUROPEAN COATINGS JOURNAL (ECJ), N° 11/96 (11/1996)
