| Titre : |
Bright future for new iron-based alkyd drier : A photo-latent catalyst that eliminates anti-skinning agents and boosts hardness |
| Type de document : |
texte imprimé |
| Auteurs : |
Jitte Flapper, Auteur ; Johan Bootsma, Auteur ; Bas de Bruin, Auteur |
| Année de publication : |
2024 |
| Article en page(s) : |
p. 32-37 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Catalyseurs métalliques
Fer
Formulation (Génie chimique)
Polyalkydes
Revêtement -- Séchage
Revêtements organiques
SiccatifsUn siccatif est une substance qui joue un rôle de catalyseur en accélérant le séchage ou durcissement (polymérisation) d'un matériau tel une huile ou une peinture à base d'huile (pour le bâtiment ou les artistes).
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
This work describes the application of an iron complex in alkyd
drying. The active species is only formed after oxidation and irradiation with (visible) light. This means that no anti-skinning agent such as an oxime, is required. Drying times and hardness development arecomparable to commercial cobalt-based alkyd driers, while hardness development outperforms commercial cobalt-free driers. |
| Note de contenu : |
- Alkyd drying reactions
- Legislation creates need for new mechanism
- New iron-based alkyd drier
- Light-activated drying prevents skin formation
- unprecedented hardness for cobalt-free driers
- Research continues to ensure commercial feasiblity
- Table 1 : Composition for paint formulation
- Table 2 : König hardness values (# oscillations) for different loadings (as wt% Fe on solid binder) of 2 and commercial Co- and Mn-based driers in the novel formulation
- Fig. 1 : Schematic representation of an alkyd, consisting of poly-acids, polyols (red) and fatty acids
- Fig. 2 : Crosslinking mechanism of unsaturated bonds in the fatty acid tails of alkyds
- Fig. 3 : Beta-scission leading to formation of aldehyde
- Fig. 4 : Neutral complex 2, oxidation towards cationic 1 and light-activation to active species
- Fig. 5 : BK-drying times (end of Phase 3) for different loadings (as wt% Fe on solid binder) of 2 and commercial Co- and Mn-based driers in the formulation from Table 1 |
| En ligne : |
https://drive.google.com/file/d/1t7zCPN2syGp_9Gxq8m6602vJ5pw6vwUZ/view?usp=drive [...] |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40844 |
in EUROPEAN COATINGS JOURNAL (ECJ) > (04/2024) . - p. 32-37
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Bright future for new iron-based alkyd drier in EUROPEAN COATINGS JOURNAL (ECJ), (04/2024)
