Abstract
Based on standard tannin adhesive formulations, tannin-resorcinol-glyoxal and tannin-resorcinol-glutaraldehyde cold-setting adhesives were prepared for wood glulam in this paper. Only less para-formaldehyde was added as hardener of adhesives. Both of them showed a rival tensile strength with tannin-resorcinol–formaldehyde adhesive. However they exhibited lower wood failure. The proportion of formaldehyde of the two are drastically decreased.
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References
NF EN 205 (1991) Test methods for wood adhesives for non-structural applications—determination of tensile shear strength of lap joints, pp 4–10
Pizzi A, Roux DG (1978) The chemistry and development of tannin-based weather- and boil-proof cold-setting and fast-setting adhesives for wood. J Appl Polymer Sci 22:1945–1954
Pizzi A, Orovan E, Cameron FA (1984) The development of weather- and boil-proof phenol-resorcinol-furfural cold-setting adhesives. Holz Roh Werkst 42:467–472
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Zhou, X., Pizzi, A. Tannin–resorcinol–aldehyde cold-set wood adhesives with only formaldehyde as hardener. Eur. J. Wood Prod. 71, 537–538 (2013). https://doi.org/10.1007/s00107-013-0701-8
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DOI: https://doi.org/10.1007/s00107-013-0701-8