| Titre : |
Optimising jetness : Achieving a 'piano black' appearance through dispersion and stabilisation |
| Type de document : |
texte imprimé |
| Auteurs : |
Angelica Sanchez, Auteur ; Lang Nguyen, Auteur ; Eugene Step, Auteur |
| Année de publication : |
2017 |
| Article en page(s) : |
p. 122-128 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Dispersions et suspensions
Formulation (Génie chimique)
Noir de carbone
Pigments inorganiques
Polyacryliques
Polyesters
Revêtement en phase solvant:Peinture en phase solvant
Revêtements en phase aqueuse:Peinture en phase aqueuse
Traîtements de surface
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Pigment manufacturers and coating formulators are often faced with a trade-off between colour performance and a stabilised dispersion. Novel technologies that maximise the benefits of accelerated dispersion and surface treatment offer of the carbon black pigment offer enhanced performance in formulations based on polar and non-polar fluids. |
| Note de contenu : |
- Pigment particle size morphology and chemistry key drivers of dispersability
- Good dispersion enhances jetness
- Surface treatment improves colour stability
- Outperforming untreated blacks in polar formulations
- Improved compatibility with non-polar formulations
- Accelerating dispersion to improve performance
- A solution for maximum jetness
- FIGURES : 1. Schematic representation of the carbon black dispersion process from reactor to final coating formulation. Dispersion (in red) illustrates a system thtat reaches colloidal stability, flocculation (in blue) illustrates a system that is not stable and flocculates into a 3D-network - 2. Carbon black morphology map in terms of oil absorption number (OAN) and particle externatl surface area based on statistical method (STSA) - 3. Schematic representation of the carbon black surface after it's formation in the carbon black reactor - 4. Dispersion of surface-modified carbon black in water-borne systems - 5. CIELab colour measurements for carbon black materials in water-borne acrylic formulations. L* is a measure of the lightness/darkness of the coating, lower values indicate darker colour or higher jetness ; b* is a measure of the blue/yellow undertone (lower number indicates bluer colour) - 6. Mc value for carbon black materials in water-borne acrylic formulations and milling time necessary to achieve the corresponding Mc value - 7. Mc for carbon black materials in water-borne acrylic formulations as function of dispersant concentration for oxidised and "Emperor" carbon blacks. The * indicates the optimal dispersant concentration needed to achieve the highest Mc value - 8. Evolution of colour for carbon blacks treated using oxidation and dispersion accelerator technology as measured by darkness L* in a solvent-borne polyester coating formulation |
| En ligne : |
https://drive.google.com/file/d/1b3jdP5Bc6OtFxHXHCvoQdrkWzOlQzs3n/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28276 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 4 (04/2017) . - p. 122-128
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