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Title
Wood coating by UV powders
Authors
VANESSA MAURIN JULIA BESSIERES CELINE CROUTXE-BARGHORN XAVIER ALLONAS ANDRE MERLIN and ERIC MASSON
Published
Volume 46 Issue 7-8 September-October
Keywords
wood-based panels, UV powders, crosslinking density, Young’s modulus, flexibility, scratch and solvent
resistance
Abstract
Many wood-based panels are nowadays used in the furniture industry. Their coating is of high interest to ensure high
protection properties and decoration features. UV powders recently emerge among the current existing technologies as
an alternative to coat wood panels due to the following advantages: they are environmentally friendly, based on 100%
solid formulations, their curing process is fast and operated at relatively low temperature, which fully preserves wood
structure. Polymerization of UV powders is monitored by Real Time-FTIR under temperature control. The influence of
temperature on reactivity is highlighted. Characteristics of UV powder resins, particularly molecular weight and
viscosity in melted state, are related to reactivity parameters. The influence of additional multifunctional monomers
within the formulations is afterwards investigated. Finally, Dynamic Mechanical Analysis is performed to determine
glass transition temperature, crosslinking density and Young’s modulus of the final coatings. Resistance to scratch and
methyl ethyl ketone (MEK) is evaluated as well.
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