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Condensed tannin-sulfonate derivatives in cold-setting wood-laminating adhesives

Informally Refereed

Abstract

Extraction of southern pine bark with 4.0 percent sodium sulfite and 0.4-percent sodium carbonate(based on ovendry bark weight) gives epicatechin-(4β)-sulfonate and oligomeric procyanidin-4-sulfonatee that show great promise to replace about 50 percent of the phenol-resorcinol-formaldehyde resin in coldsetting wood-laminating adhesives. Bonds in Douglas-fir laminates exceed the minimal shear strength and wood failure requirements of the American Institute of Timber Construction Standards for dry shear (AITC-T107) and vacuum-pressure cold-water soak (AITC-T110) tests.

Citation

Kreibich, Roland E.; Hemingway, Richard W. 1987. Condensed tannin-sulfonate derivatives in cold-setting wood-laminating adhesives. Forest Products Journal 37(2):43-46
https://www.fs.usda.gov/research/treesearch/8167