0571071 - ÚIACH 2024 RIV eng P - Patent Document
Palcer, J. - Pařil, P. - Baar, J. - Foret, František - Křenková, Jana
Method of staining wood and method of determination of phenolic compounds content in wood.
2023. Owner: Ústav analytické chemie AV ČR, v. v. i., Mendelova univerzita v Brně. Date of the patent acceptance: 29.03.2023. Patent Number: EP3710211B1. Territorial Protection: evropský patent s jednotným účinkem .
Institutional support: RVO:68081715
Keywords : phenolic compounds * colour change * UV resistance * tannin-containing wood * iron oxide nanoparticles
OECD category: Analytical chemistry
Result website:
https://register.epo.org/application?number=EP17809173&tab=main

The present invention provides a method of staining wood using iron nanoparticles, characterized in that it comprises the following steps: - iron oxide nanoparticles are prepared by precipitation of iron(II) and/or iron(III) ions in basic medium, wherein the base is a non-ammonium base, to form iron oxide nanoparticles having a Z-average particle size in the range of 1 to 500 nm, as measured by dynamic light scattering method (DLS), and - wood, preferably tannin-containing wood, is impregnated with a composition containing said iron oxide nanoparticles in concentration within the range of 0.1 g/l to 100 g/l. The method results in improved UV resistance properties of the stained wood. Furthermore, method of determination of phenolic compounds content is provided, using the staining method.
Published as EP3710211A1, EP3710211B1, WO2019096336A1.
Permanent Link: https://hdl.handle.net/11104/0342394