| Titre : |
Air convective drying and curing of polyurethane-based paints on sheet molding compound surfaces |
| Type de document : |
texte imprimé |
| Auteurs : |
S. Vessot, Auteur ; J. Andrieu, Auteur ; Jocelyne Galy, Auteur ; J. F. Gérard, Auteur ; P. Laurent, Auteur |
| Année de publication : |
1998 |
| Article en page(s) : |
p. 67-76 |
| Note générale : |
Bibliogr. |
| Langues : |
Américain (ame) |
| Catégories : |
Cinétique chimique
Matériaux -- Imprégnation
Polymérisation
Polyuréthanes
Réticulation (polymérisation)
Revêtements
Revêtements bi-composant
|
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
In this study the kinetics and phase changes which occurred during the convective drying of a model car paint based on the polyurethane chemistry is described. The competition between the kinetics of the solvent removal and the phase changes, such as the gelation and/or the vitrification of the polyurethane, needs to be taken into account to avoid the defects in the resulting dried coating. The kinetics of polycondensation of a two-component polyurethane based on polyester triol and triisocyanate in a mixture of various solvents was studied as a 100 μm thick layer on sheet molding compound (SMC) and zinc plated steel plates. Differential scanning calorimetry (DSC) and Fourier-Transform infrared spectrometry (FTIR) and thermogravimetric analysis (TGA) during isothermal curings allowed us to determine the rate constants and the activation energies by using second and third order autocatalytic models. |
| Note de contenu : |
- EXPERIMENTAL : Reagents and substrates
- RESULTS AND DISCUSSION : Effect of temperature - Effect of the stoichiometric ratio - Effect of the substrate nature |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=18018 |
in JOURNAL OF COATINGS TECHNOLOGY (JCT) > Vol. 70, N° 882 (07/1998) . - p. 67-76
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