[article]
| Titre : |
Extenders - Calcium carbonate |
| Type de document : |
texte imprimé |
| Auteurs : |
M. Veeramani, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 100-104 |
| Langues : |
Anglais (eng) |
| Catégories : |
Carbonate de calcium broyé
Carbonate de calcium précipité
Carbonate de calciumLe carbonate de calcium (CaCO3) est composé d'un ion carbonate (CO32-) et d'un ion calcium (Ca2+), sa masse molaire est de 100,1 g/mole.
C'est le composant principal du calcaire et de la craie, mais également du marbre. C'est aussi le principal constituant des coquilles d'animaux marins, du corail et des escargots.
Charges (matériaux)
Revêtements en phase aqueuse -- Additifs:Peinture en phase aqueuse -- Additifs
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
We now go to the next Extender viz : calcium carbonate in detail. Semi-gloss emulsion paints are formulated well below the CPVC. Under these conditions there is no "dry hiding effect" from the pigment and extenders, and relatively high levels of TiO2 pigment. In addition to the prime color pigments described above, decorative coatings and stains also contain filler or extender pigments, such as ground calcium carbonate (GCC), talc and kaolin. The key function of these minerals is to lower costs by either extending or maximizing the efficiency of the more costly color pigments, reducing the amounts needed to achieve the desired color, and filling up the volume in the paint, thus reducing the use of resins and/or solvents. In choosing a filler pigment, both the demands of the end use and the cost constraints (i.e. selling price) must be considered. The performance of a given filler in a coating depends on its basic chemical nature, as well as its particle size, particle shape, surface chemistry, color, and whiteness or brightness (both dry and wet). Most decorative coatings contain a combination of filler minerals of different types and sizes to achieve the targeted balance of application, appearance, durability, and cost properties. |
| Note de contenu : |
- Ultra fine ground calcium carbonate for high gloss paints
- How is precipitated calcium (PCC) made ?
- What is precipitated calcium carbonate (PCC) made from ?
- Why is all the processing done ?
- How does precipitated calcium carbonate differ from ground calcium carbonate (GCC) ? |
| En ligne : |
https://drive.google.com/file/d/1k-kPxXGFhiCaT6It9pRxEsy9iNrH5FFJ/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25270 |
in PAINTINDIA > Vol. LXV, N° 11 (11/2015) . - p. 100-104
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Extenders - Calcium carbonate in PAINTINDIA, Vol. LXV, N° 11 (11/2015)
