Durability of Selected Transparent and Semi-Transparent Coatings on Siberian and European Larch during Artificial Weathering

Coatings

Kristýna Šimůnková¹  Irena Štěrbová¹  Miloš Pánek¹  Eliška Oberhofnerová¹  Milan Podlena¹  Ladislav Reinprecht² 

[1] Department of Wood Products and Wood Constructions, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Kamýcká 129, Prague 165 21, Czech Republic;Faculty of Wood Sciences and Technology, Technical University in Zvolen, Masarykova 24, Zvolen 960 53, Slovakia;

关键词: artificial weathering;    colour;    gloss;    larch wood;    moulds;    transparent and semi-transparent coatings;    wetting;   

DOI  :  10.3390/coatings9010039

来源: DOAJ

【 摘 要 】

This paper compares the resistance of 20 commercial transparent and semi-transparent coatings applied to European and Siberian larch during artificial weathering in Xenotest. The change in gloss, colour, contact angle of wetting, resistance to Aspergillus niger and Penicillium brevicompactum moulds was evaluated, and visual changes at the top surface of treated wood species were measured. Overall, the durability of coatings on European larch was higher than that on Siberian larch. The most durable of the tested coatings was a thin-film, i.e., semi-transparent oil-based film containing TiO2 pigment and propiconazole fungicide. Of the transparent coatings, the most stable was a thick acrylic coating. Conversely, penetrating transparent oil systems had low colour stability and overall lifespan. Artificial weathering of all of the coatings resulted in a marked decrease in their resistance to moulds.

【 授权许可】

Unknown