[article]
| Titre : |
Dispersing technology |
| Type de document : |
texte imprimé |
| Auteurs : |
Manoj Sathyan, Auteur |
| Année de publication : |
2008 |
| Article en page(s) : |
p. 95-128 |
| Langues : |
Anglais (eng) |
| Catégories : |
Agents dispersants (chimie)
Couleurs -- Stabilité
Dispersions et suspensions
Floculation
Noir de carbone
Pigments
Stabilisants (chimie)
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Coating is a complex subject if formulators want to formulate defects free and yet obtain the best stable performance coating. The most complex part of coating is the wetting and dispersing of stabilizing solid particles in the system. Thus, dispersion of solid in liquids involveds extensive colloid chemistry in order for us to understand how these particles can be wetted, dispersed and eventually stabilized. Stabilization of pigments is the most important factor in coating to ensure a well dispersed pigmented coating.
Below are the definitions for wetting, dispersing as well as stabilization in relation to coating. |
| Note de contenu : |
Wetting - Dispersing - Stabilization
- AGGLOMERATION, AGGREGATES AND FLOCCULATION : Flocculation forces
- WAYS TO DO STABILIZATION : Pigments pre-treatment - Dispersing resins - Resins in the system - Dispersant as additives
- BASIC DISPERSANT CRITERIA : Compatibility - Low surface tension - Pigment affinity group, anchoring group
- DISPERSANT ADDITIVES AND THEIR HISTORY : Conventional wetting and dispersing agent - High molecular weight dispersants
- TEST METHODS FOR OPTIMAL STABILITY BY DISPERSING AGENT : Rub out test - Pour out test
- PROBLEMS RELATED TO POOR STABILIZATION : Poor color strength/tinging strength - Color stability - Flooding and floating - Synaeresis - Poor gloss/loss of gloss - Transparency of organic pigment and carbon black - Leveling and flow - Influence of other factors toward the efficiency of dispersants - Compatibility - Amount of milling resins- Milling viscosity |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12102 |
in PAINTINDIA > Vol. LVIII, N° 1 (01/2008) . - p. 95-128
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Dispersing technology in PAINTINDIA, Vol. LVIII, N° 1 (01/2008)
