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    Author(s): Roland E. Kreibich; Richard W. Hemingway
    Date: 1987
    Source: Forest Products Journal 37(2):43-46
    Publication Series: Miscellaneous Publication
    PDF: Download Publication  (947 KB)


    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.

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    Kreibich, Roland E.; Hemingway, Richard W. 1987. Condensed tannin-sulfonate derivatives in cold-setting wood-laminating adhesives. Forest Products Journal 37(2):43-46

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