| Titre : |
Role and mechanism of formic acid in stripping of paint comprising epoxy primer and polyurethane topcoat |
| Type de document : |
texte imprimé |
| Auteurs : |
Zhida Huang, Auteur ; Jianhao Zhou, Auteur ; Chuanfeng Hu, Auteur ; Huihui Fu, Auteur ; Xinhua Peng, Auteur |
| Année de publication : |
2018 |
| Article en page(s) : |
p. 385-394 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Chimie analytique
Epoxydes
Formique, Acide
Polyuréthanes
Primaire (revêtement)
Revêtements -- Décapage:Peinture -- Décapage
Vernis
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Previous practice indicates that formic acid can play a significant role in the process of paint stripping. The results of this work explain how formic acid promotes degradation of both the topcoat and primer, and how proper use of a solvent can accelerate this process. To understand the role of acidic components in the method and develop a neutral or mildly acidic remover, we investigated this process using qualitative research methods. The degradation mechanism of topcoat and primer by formic acid in various solvent systems was studied to promote development of neutral or mildly acidic paint remover for use in this field. Fourier transform infrared (FTIR) spectra indicated that the polyurethane topcoat was degraded to aliphatic alcohol while carbamate was rapidly degraded to carbon dioxide and primary amine. At the same time, the epoxy primer was degraded to phenolic substances and aldehydes. X-ray photoelectron spectroscopy (XPS) results confirmed the proposed mechanism of this process. |
| Note de contenu : |
- MATERIALS AND METHODS : Chemicals and coating sample preparation - Experimental - FTIR-ATR - X-ray photoelectron spectroscopy (XPS) - Scanning electron microscopy (SEM)
- RESULTS AND DISCUSSION : Polyurethane topcoat - Epoxy primer
- COMPLIANCE WITH ETHICAL STANDARDS : Conflict of interest
|
| DOI : |
10.1007/s11998-017-9993-7 |
| En ligne : |
https://link.springer.com/content/pdf/10.1007%2Fs11998-017-9993-7.pdf |
| Format de la ressource électronique : |
pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=30297 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 15, N° 2 (03/2018) . - p. 385-394
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