[article]
| Titre : |
Coal-derived, solid resins as economic raw materials for coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Stefan Holberg, Auteur ; Xinyan Wang, Auteur ; William C. Schaffers, Auteur ; David A. Bell, Auteur ; Jeramie J. Adams, Auteur ; Patrick A. Johnson, Auteur |
| Année de publication : |
2021 |
| Article en page(s) : |
p. 921-931 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Acier L'acier est un alliage métallique utilisé dans les domaines de la construction métallique et de la construction mécanique.
L'acier est constitué d'au moins deux éléments, le fer, très majoritaire, et le carbone, dans des proportions comprises entre 0,02 % et 2 % en masse1.
C'est essentiellement la teneur en carbone qui confère à l'alliage les propriétés du métal qu'on appelle "acier". Il existe d’autres métaux à base de fer qui ne sont pas des aciers comme les fontes et les ferronickels par exemple.
Anticorrosifs
Anticorrosion
Caractérisation
Charbon
Eau salée
Epoxydes
Extraction par solvant
Isocyanate de phénol
Métaux -- Revêtements protecteurs
Polyuréthanes
Revêtements organiques
Test d'immersion
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Solvent extraction of subbituminous coal at mild conditions (360°C) provides solid extracts that consist of numerous organic molecules that can be utilized in the synthesis of polymeric coatings. We describe the extraction process as well as the application of the resultant materials, which bear phenolic groups as the main reactive functionality, for the synthesis of polyurethane and epoxy coatings. The respective reactions of coal extract with isocyanates or epoxides were validated by 13C-NMR. By combining 50–67% coal extract with suitable, flexible co-reactants and co-resins, we formulated coatings with excellent wet adhesion to aluminum, flexibility, and corrosion protection with the same quality as reference coatings. The work is an advancement toward the goal of developing economic and resource-efficient routes from coal to polymers with attractive properties, where coal extracts can compete with petrochemically derived raw materials. |
| Note de contenu : |
- METHODS AND MATERIALS : Coal extraction - Coating raw materials - Coating preparation and application - Characterization
- RESULTS AND DISCUSSION : Coal extraction - Coal extract characterization - Coal extract solubility - Coatings applying tetralin insoluble coal extract TI - Coatings applying tetralin-soluble coal extract TS - Health and environmental hazards
- Table 1 : Elemental analysis of coal and coal extracts
- Table 2 : Hydroxy (OH) group analysis by derivatization and 31P-NMR24
- Table 3 : Model reactions with phenyl isocyanate
- Table 4 : Model reactions with butyl glycidyl ether (BuGlyEther) heated 1.5 h to 160°C in a pressure bomb
- Table 5 : PU coating based on TI coal extract
- Table 6 : Coal extract PU coatings with thermoplastic, tacky P
- Table 7 : Coal extract-based epoxy coatings with standard resins, all cured 1 h at 160°C
- Table 8 : Coal-extract-based epoxy coatings with flexible resins, all cured 1 h at 160°C
- Table 9 : Saltwater immersion of coated steel coupons (1 week at 20°C) with evaluation according to ASTM D714-02 (blistering) and ASTM D1654 (rust creepage) on two specimen per coating
- Table 10 : Coatings applying extract TS as filler. All coatings cured 5 days at ~ 20°C |
| DOI : |
https://doi.org/10.1007/s11998-020-00457-7 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-020-00457-7.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35940 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 3 (05/2021) . - p. 921-931
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Coal-derived, solid resins as economic raw materials for coatings in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)
