| Titre : |
Pigment dispersion and stabilization |
| Type de document : |
texte imprimé |
| Auteurs : |
Amit S. Agrawal, Auteur ; Ajit K. Padhi, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 56-58 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Dispersions et suspensions -- Stabilité
Fragmentation
Mouillage (chimie des surfaces)
Pigments
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Pigments are inherent to paint formulations. They provide color strength, gloss and color intensity to the paint. To use powder pigments, formulators need to grind the pigments first. The particle size distribution of the mill base influences a lot the quality and more specifically the color strength of die final paint. Complete dispersion of pigment and extender in the liquid medium is essential for optimization properties such as process ability, shelf-life stability, color development, opacity and gloss. Moreover, the quality of the dry paint film is very much related to the uniformity of the distribution of the pigment. Separation and settling, inferior mechanical film properties and low film transparency are often related to insufficient pigment dispersion. In order to optimize the stage of dispersion, well controlled conditions for the dispersion process and dispersion stabilization need to be maintained. |
| Note de contenu : |
- DISPERSING PROCESS : Destroying of agglomerates (Acting of mechanical forces - Physical and chemical interactions - Wetting of pigment surfaces - Difference in surface tension between pigment and liquid media - Oil absorption of pigment - Stabilisation of a dispersion
- MECHANISMS OF DISPERSION : Electrostatical stabilization - Sterical stabilization
- EFFECT OF GRINDING TIME AND MEDIA ON DISPERSION
- COROLLARY OF PROPER DISPERSION
- SELECTION OF RAW MATERIALS FOR COATING FORMULATION |
| En ligne : |
https://drive.google.com/file/d/12eLHlRwC4XRTnfmEzxPbXwCDPLQmYLwv/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=24146 |
in PAINTINDIA > Vol. LXV, N° 3 (03/2015) . - p. 56-58
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