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Emissionsarme UV-Systeme für Holzoberflächen

 
: Salthammer, T.

Salthammer, T. ; Fraunhofer-Institut für Holzforschung, Wilhelm-Klauditz-Institut -WKI-, Braunschweig:
Strahlenhärtende Beschichtungssysteme für Holzoberflächen : Techniken, Neuentwicklungen, Restemissionen, Prüfung, Bewertung
Braunschweig, 1999 (WKI-Bericht 34)
pp.99-110
Fraunhofer-Institut für Holzforschung, Wilhelm-Klauditz-Institut (Seminar) <1999, Braunschweig>
German
Conference Paper
Fraunhofer WKI ()

Abstract
The application of UV-curing in furniture coating has significantly increased in recent years because this technology is based on a number of benefits. However, fragmentation processes of common photoinititators form a number of odorous products, which may reach considerable concentrations in indoor air. As a consequence, new photoinitiators of high reactivity but low volatility have been developed. Moreover, a wide variety of different acrylate binders and reactive diluents are used in UV-coatings. The usual binders are often too viscous for certain applications. Therefore monomers are needed to adjust the viscosity. These monomers are irritant and require certain safety precautions for handling. This can be overcome by using more modern binders like low-viscous polyether or polyester acrylates. VOC emissions from UV-cured furniture coatings were investigated in test chambers under standard living conditions. Solvent-based and waterbased systems as well as different application tech n iques and different substrates were taken into account. As expected, the main components detected in the chamber air were photoinitiator fragments and solvents. Chamber concentrations were found to be strongly dependent on the type of photoinitiator and on the test conditions. In comparison to other types of furniture coatings, the release of VOC from modern types of UV-cured coatings systems can be regarded as low.

: http://publica.fraunhofer.de/documents/PX-11956.html