Abstract
Spruce and poplar samples were treated with different melamine formaldehyde resins. A long term artificial weathering experiment was performed in order to clarify the resistance to weathering regarding wood colour and surface hardness. The increase in hardness due to melamine treatment was well preserved after simulated long term weathering. The treated samples also showed advantages compared to untreated reference samples regarding discolouration and crack formation. Low molar mass and low degree of methylolation of the melamine resin used was found to be favourable for a successful treatment.
Zusammenfassung
Fichten- und Pappelproben wurden mit verschiedenen Melaminformaldehydharzen behandelt. Um die Widerstandsfähigkeit gegen Bewitterung hinsichtlich Holzfarbe und Oberflächenhärte zu klären, wurde ein Langzeit-Experiment mit künstlicher Bewitterung durchgeführt. Die Erhöhung der Härte auf Grund der Melaminbehandlung blieb auch nach der Langzeitbewitterung gut erhalten. Die behandelten Proben zeigten ausserdem Vorteile hinsichtlich Verfärbung und Rissbildung gegenüber unbehandelten Referenzproben. Geringe Molmasse und geringer Methylolierungsgrad des verwendeten Melaminharzes zeigten sich für eine erfolgreiche Behandlung von Vorteil.
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Hansmann, C., Deka, M., Wimmer, R. et al. Artificial weathering of wood surfaces modified by melamine formaldehyde resins. Holz Roh Werkst 64, 198–203 (2006). https://doi.org/10.1007/s00107-005-0047-y
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DOI: https://doi.org/10.1007/s00107-005-0047-y