Polyamidoamines (PAAs) utilized in this research were obtained by the reaction between N,N-methyl-bis-acrylamide (MBA) and Ethanolalmine (EtA) and/or aminopropytriethoxysilane (APTES). Different combinations between them were tested as wood preservatives against fungal decay. First, in situ impregnations of PAAs, with the reagents above described in different ratio, were performed and the effectiveness against C. puteana, through an accelerated mini-blocks test and EN 84 were determined. After the previous described screening test where the more promising formulations resulted those with the siloxames fragments, APTES and EtA were tested against three different fungi, C. puteana, T. versicolor and P. placenta through EN 113 and EN 84 tests. The EN 113 test showed that PAAs, functionalized with APTES alone, can be utilized as potential wood preservatives especially when the wood is not exposed directly to the leaching due to the rainfall.

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