Biological resistance of wood treated with waterbased resins and drying oils in a mini-block test

IRG/WP 98-40107

M Sailer, A O Rapp, R-D Peek

In recent years it was found that the resistance of wood against fungal degradation could be increased by impregnation with an etherificated melamine formaldehyde resin. Using this resin as a reference, a waterbased fatty acid modificated alkyd-resin and two drying-oils were assessed for their biological performance in a mini-block laboratory test. Although drying-oils, like linseed-oil, are often used as a binder in paints, little information is available about the resistance of wood impregnated with these oils against wood destroying basidiomycetes. The fungi used in this test were the brown rot fungi Coniophora puteana, Gloeophyllum trabeum and the white rot fungus Trametes versicolor. The results showed considerable less mass loss of the melamine resin and the drying oils treated wood compared to the untreated Scots pine (Pinus sylvestris) controls. The mass loss of the oil treated specimens, however, was obviously depending on the fungus and the applied treatment and the wood species.


Keywords: ETHERIFICATED MELAMIN FORMALDEHYDE RESIN; ALKYD-RESIN; LINSEED-OIL; HEMP-OIL; MINI-BLOCK TEST

Conference: 98-06-14/19 Maastricht, The Low Countries


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