The influence of calcium and zirconium based secondary driers on drying solvent borne alkyd coatings
| Autor: | Ö. Gezici-Koç, F.L. Duivenvoorde, HP Henk Huinink, M.E.B. Michel, S.J.F. Erich, Olaf C. G. Adan, C.A.A.M. Thomas, L.G.J. van der Ven, J. Flapper |
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| Přispěvatelé: | Transport in Permeable Media, Physical Chemistry, Thermo-Chemical Materials Lab |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics Alkyd coating chemistry.chemical_element High Tech Systems & Materials 02 engineering and technology Manganese engineering.material 010402 general chemistry 01 natural sciences Catalysis Coating Materials Chemistry Composite material Materials Curing (chemistry) TS - Technical Sciences Zirconium Industrial Innovation Crosslinking Organic Chemistry Alkyd MAS - Materials Solutions 021001 nanoscience & nanotechnology 0104 chemical sciences Solvent chemistry Chemical engineering visual_art engineering visual_art.visual_art_medium Nano Technology Catalyst 0210 nano-technology Cobalt |
| Zdroj: | Polymer, 121, 262-273. Elsevier Polymer (United Kingdom), 121, 262-273 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2017.06.031 |
| Popis: | Cobalt based driers are the most commonly used primary catalysts in alkyd coatings as they promote fast drying and lead to hard coatings. However, several studies have suggested potential reclassification of cobalt-based alkyd driers. Therefore, cobalt based driers are being replaced by alternatives, e.g. based on iron or manganese. In practice primary driers (Co, Mn, or Fe) are used in combination with secondary driers (e.g. Ca, Zr) to enhance drying of the film. Coating formulators aim for a high drying speed and hardness development. However, each combination of primary and secondary driers leads to a different oxidative drying pattern resulting in variations in the crosslink density and hardness development. In this study we have systematically investigated the effect of two secondary driers, Calcium (Ca) and Zirconium (Zr), on curing behavior when added to different primary driers (Co, Mn, and Fe) using a high spatial resolution NMR set-up. As expected, we observed increased drying speed and higher crosslink densities when adding these secondary driers. While calcium showed to promote the front speed, zirconium showed to increase the measured crosslink density. The behavior seems to be generic as this was seen for all three the primary driers. © 2017 Elsevier Ltd |
| Databáze: | OpenAIRE |
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