A. Sauget1,*, X. Zhou1, A. Pizzi1,2
Journal of Renewable Materials, Vol.2, No.3, pp. 186-200, 2014, DOI:10.7569/JRM.2013.634138
Abstract Glyoxal and glutaraldehyde are two viable alternatives to formaldehyde for the preparation of tanninresorcinol-aldehyde adhesive but lead to less resistant glue joint. Tannin-resorcinol-glyoxal (TRG1) and
tannin-resorcinol-glutaraldehyde (TRG2) resins have been prepared and analyzed by matrix-assisted laser
desorption/ionization time of fl ight (MALDI-ToF) spectrometry to understand the chemical process behind
the pre-curing of these resins and possibly the causes of this lower resistance. The analysis showed that TRG
resins are not a simple mix of resorcinol-aldehydes oligomers and fl avonoids, but a much more complex
combination of various species including tannin-aldehydes and tannin-resorcinol oligomers. More >
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