[article]
| Titre : |
Aqueous dispersions : high purity, easy-to-use coating additives |
| Type de document : |
texte imprimé |
| Auteurs : |
Alexandre Giardino Carmello, Auteur ; Brian Prevo, Auteur |
| Année de publication : |
2014 |
| Article en page(s) : |
p. 32-34-38 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Alumine
Latex
Matériaux -- Propriétés barrières
Oxydes métalliques
Polyacryliques
Poudres
Résistance à l'abrasion
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
Rhéologie
SiliceLa silice est la forme naturelle du dioxyde de silicium (SiO2) qui entre dans la composition de nombreux minéraux.
La silice existe à l'état libre sous différentes formes cristallines ou amorphes et à l'état combiné dans les silicates, les groupes SiO2 étant alors liés à d'autres atomes (Al : Aluminium, Fe : Fer, Mg : Magnésium, Ca : Calcium, Na : Sodium, K : Potassium...).
Les silicates sont les constituants principaux du manteau et de l'écorce terrestre. La silice libre est également très abondante dans la nature, sous forme de quartz, de calcédoine et de terre de diatomée. La silice représente 60,6 % de la masse de la croûte terrestre continentale.
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
The difficulty of handling, incorporating and dispersing some powder additives presents challenges to coating manufacturers employing such materials in their formulations. Furthermore, working with these powders can lead to some disadvantages including dirtiness and dust, contamination and possibly reduced performance.
Cab-O-Sperse fumed metal oxide dispersions can help balance or break some of the trade-offs between processing powder additives and the final performance of the coatings formulations in which those additives are used. Cab-0- Sperse dispersions use proprietary Cabot technology to produce highly stable fumed alumina or fumed silica dispersions in water, featuring uniform particle distributions with an average size of less than 0.2 pm, differing solid contents (12 to 40%), surface charges (anionic or cationic) and pH values (4 to 10.5). This results in several advantages compared to powder products, including ease of incorporation and mixing into liquid coatings, reduced dust in the environment, less waste and reduced risk of bubbling caused by trapped air. When used in coatings, the Cab-O-Sperse product line provides increased film hardness and abrasion resistance, improved corrosion resistance and barrier properties.
The Cab-O-Sperse dispersions line is presented below via comparative studies of formulations with no additives, formulations with rheological additives including dry fumed silica powder and formulations with added Cab-O-Sperse dispersions, in order to analyse their hardness, scratch resistance, transparency and rheological properties. |
| Note de contenu : |
- An overview of fumed silica and fumed silica dispersions in coatings
- Polymer latex reinforcement by CAB-O-SPERSE dispersions
- Performance studies of waterborne acrylic coating containing CAB-O-SPERSE dispersions |
| En ligne : |
https://drive.google.com/file/d/1_XDTYh0D0I8WBKm6IXAWx15os0WyOwJR/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20752 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 204, N° 4594 (03/2014) . - p. 32-34-38
[article]
|
Aller sur edunet
Accueil
Aqueous dispersions : high purity, easy-to-use coating additives in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 204, N° 4594 (03/2014)
