| Titre : |
Greener manufacturing process for chain stopped alkyd paint |
| Type de document : |
texte imprimé |
| Auteurs : |
Maryam Amra Jordaan, Auteur ; Thembeka Samkelisiwe Dlamini, Auteur ; Michael M. Shapi, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 16-24 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Argile
Automobiles -- Revêtements:Automobiles -- Peinture
Dispersions et suspensions
Essais (technologie)
Fourier, Spectroscopie infrarouge à transformée de
Polyalkydes
Réflexion totale atténuée
Rhéologie
Solubilité
Surfactants
|
| Index. décimale : |
667.6 Peintures |
| Résumé : |
The current process of CSAP manufacture is an environmentally hazardous process, which leads to toxic heavy metal accumulation in industrial effluent and increased VOC emissions. The research conducted modified this process by replacing both the HSF technology with HSD technology and substitution with a more compatible organoclay. The modified organoclay exhibited the intercalation of cationic surfactant between the clay layers and thus, changed the surface properties from highly hydrophilic to increasingly hydrophobic. In addition, modification of the swelling clay with cationic surfactant results in an increase in the basal or interlayer spacing of the layer and exposure of new sorption sites of clay. This modification allows a lower viscosity and better dispersion with the moderately polar solvent system used in the formulation. The viscosity vs time results additionally illustrated that although the HSD system produced FOG particles larger than those of the HSF system and used less solvant over time, the HSF system produced CSAP that was more viscous and the smaller FOG particle size caused electrostatic tension in the paint suspension ie syneresis. The larger FOG particle size from the HSD system essentially contributed to paint stability. The improved CSAP manufacturing process achieved a substantial lower volume of solvent, which can also be recycled. Further research includes the application of solid-state NMR to further analyse the complexity of these organoclays in determining solubility limitations. |
| Note de contenu : |
- EXPERIMENTAL : Materials - Procedure - Attenuated Total Reflectance FTIR (ATR-FTIR) - Mass data
- RESULTS AND DISCUSSION : FTIR data - Solubility in polar and non-polar solvents - Viscosity testing
- FIGURES : 1. HSF (Highest Speed Fluidar) schematic (supplied by the undisclosed paint company) - 2. HSD (Highest Speed Disperser) schematic (supplied by the undisclosed paint company) - 3. Chain stopped alkyd resin FTIR spectrum - 4. Polar organoclay FTIR spectrum - 5. Moderately non-polar organoclay FTIR spectrum - 6. Non-polar solvent FTIR spectrum - 7. Cream sample viscosity vs time graph, (40°C oven samples in fig. 7-16) - 8. Organic red sample - 9. Inorganic red sample - 10. Organic yellow sample - 11. Inorganic yellow sample - 12. Orange sample - 13. Green sample - 14. Blue sample - 15. Brown sample - 16. Grey sample - 17. Intercalation of alkyl ammonium cations in between montmorillonite clay silicate layers - 18. Steric stabilisation caused by the surfactants - 19. Electrostatic stabilisation - 20. Sag panel (ail sag) and HSF vs HSD panels (pass sag)
- TABLES : 1. Experimental procedure - 2. Average percentage yield for both HSD and HSF technology - 3. FTIR absorption data for the 3 different types of clays - 4. Spontaneous solubility results - 5. HSD and HSF particle size and CSAP performance data - 6. Viscosity stability table results |
| En ligne : |
https://drive.google.com/file/d/1QCOLd39kQBgGn7YUZAJdHMGfKpENvD9s/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30620 |
in POLYMERS PAINT COLOUR JOURNAL - PPCJ > Vol. 208, N° 4641 (05/2018) . - p. 16-24
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