| Titre : |
Accelerated weathering of wood coatings - Development of a new test cycle |
| Type de document : |
texte imprimé |
| Auteurs : |
Marinus Hoeflaak, Auteur ; Wolfgang F. Gard, Auteur |
| Année de publication : |
1996 |
| Article en page(s) : |
p. 28-31 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
A new relatively wet test cycle for accelerated weathering of wood coatings is developed. The wet period is chosen in such a way that the maximum moisture content of test panels approaches the moisture content of test panels during outdoor exposure in the Netherlands. A long wet period during the test is essential for leaching of low molecular components from water borne paint systems. For twelve commercially available paint systems the results of the new accelerated test cycle are compared with results of outdoor exposure. This comparison is based on changes in water uptake of painted wooden test panels and on changes in visco-elastic behaviour of the paint films. The test results show clearly that the water barrier function and the visco-elastic behaviour of the paint systems can change considerably during weathering. The important role of leaching during the test is confirmed. The newly develop test cycle correlates well with outdoor exposure at Delft, the Netherlands. |
| Note de contenu : |
- Coating types and preparation of test panels
- Description of accelerated weathering test and outdoor exposure test - Basic requirements for a realistic accelerated test - Design of a wet test cycle for accelerated weathering - Outdoor exposure tests
- Characterization of functional properties before and after weathering - Determination of changes in water barrier functions - Determination of changes in visco-elastic behaviour
- Results, processing of data and calculation of correlations |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11277 |
in EUROPEAN COATINGS JOURNAL (ECJ) > N° 1-2/96 (01-02/1996) . - p. 28-31
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Accelerated weathering of wood coatings - Development of a new test cycle in EUROPEAN COATINGS JOURNAL (ECJ), N° 1-2/96 (01-02/1996)
