| Titre : |
Drying of alkyd emulsion paints |
| Type de document : |
texte imprimé |
| Auteurs : |
P. K. Weissenborn, Auteur ; A. Motiejauskaite, Auteur |
| Année de publication : |
2000 |
| Article en page(s) : |
p. 65-74 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Agents dispersants (chimie)
Cobalt
Dioxyde de titane
Pigments inorganiques
Polyalkydes
Revêtements -- Additifs
Revêtements en phase aqueuse:Peinture en phase aqueuse
SiccatifsUn siccatif est une substance qui joue un rôle de catalyseur en accélérant le séchage ou durcissement (polymérisation) d'un matériau tel une huile ou une peinture à base d'huile (pour le bâtiment ou les artistes).
|
| Tags : |
'Matériau revêtement' 'Peinture eau' émulsion' 'Alkyde résine' 'Formation film' Séchage Siccatif 'Cobalt Composé' 'Pigment minéral' 'Titane Oxyde' Adjuvant Dispersant 'Etude expérimentale' |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The drying and film formation of long oil alkyd emulsions was investigated with emphasis on loss of dry upon storage. The main reason for loss of dry was adsorption of the cobalt (drier) on pigment surfaces as a precipitated hydroxide. Titanium dioxides with alumina surface treatment and organic pigments were most detrimental to drying. Acrylate- and phosphate-based dispersants also deactivated the cobalt, presumably due to complexation and precipitation of the cobalt. Emulsions prepared with an emulsifiable cobalt drier containing 2,2'-bipyridyl (complexing agent for cobalt) showed the best resistance to loss of dry. Atomic force microscopy of films formed from the emulsions showed that the emulsifier migrated to the film surface which, when washed with water, leaves holes or pits in the film. The pits were arranged in a hexagonal pattern characteristic of Bénard cells, which form due to surface tension and/or temperature gradients generated in the film during evaporation of water. |
| Note de contenu : |
- MATERIALS: Alkyd resins - Emulsifiers - Driers - Dispersants - Pigments - Other Reagents
- METHODS: Alkyd resin emulsification - Addition of dispersants to LO83 alkyd emulsions - Addition of pigments to LO83 Alkyd emulsions - Storage stability and loss of dry tests - BK drying tests - Emulsion characterization - Film formation studies
- DRYING PROPERTIES OF PURE ALKYD EMULSIONS: Effect of emulsion pH - Effect of cobalt form and location - Other variables
- DRYING PROPERTIES OF EMULSIONS CONTAINING PIGMENT DISPERSANTS
- DRYING PROPERTIES OF EMULSIONS CONTAINING PIGMENTS
- FILM FORMATION |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=17987 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 72, N° 906 (07/2000) . - p. 65-74
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Drying of alkyd emulsion paints in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 72, N° 906 (07/2000)
