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Polymers 2018, 10(1), 22; doi:10.3390/polym10010022

Melamine–Glyoxal–Glutaraldehyde Wood Panel Adhesives without Formaldehyde

LERMAB, University of Lorraine, 27 rue Philippe Seguin, 88000 Epinal, France
Author to whom correspondence should be addressed.
Received: 10 November 2017 / Revised: 10 December 2017 / Accepted: 21 December 2017 / Published: 24 December 2017
(This article belongs to the Collection Polymeric Adhesives)


(MGG’) resin adhesives for bonding wood panels were prepared by a single step procedure, namely reacting melamine with glyoxal and simultaneously with a much smaller proportion of glutaraldehyde. No formaldehyde was used. The inherent slow hardening of this resin was overcome by the addition of N-methyl-2-pyrrolidone hydrogen sulphate ionic liquid as the adhesive hardener in the glue mix. The plywood strength results obtained were comparable with those obtained with melamine–formaldehyde resins pressed under the same conditions. Matrix assisted laser desorption ionisation time of flight (MALDI ToF) and Fourier transform Infrared (FTIR) analysis allowed the identification of the main oligomer species obtained and of the different types of linkages formed, as well as to indicate the multifaceted role of the ionic liquid. These resins are proposed as a suitable substitute for equivalent formaldehyde-based resins. View Full-Text
Keywords: ionic liquids; melamine resins; wood adhesives; plywood; ionic liquids role; MALDI-ToF; FTIR ionic liquids; melamine resins; wood adhesives; plywood; ionic liquids role; MALDI-ToF; FTIR

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Xi, X.; Pizzi, A.; Amirou, S. Melamine–Glyoxal–Glutaraldehyde Wood Panel Adhesives without Formaldehyde. Polymers 2018, 10, 22.

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