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    Author(s): J.M. Wescott; C.R. Frihart; A.E. Traska
    Date: 2006
    Source: Journal of adhesion science and technology. Vol. 20, no. 8 (2006): pages 859-873.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (1.1 MB)

    Description

    Water-resistant bonds are important in many wood products and have been hard to obtain with many bio-based adhesives. Using a three-step process, water-soluble soy flour has been converted into adhesives that cure into an insoluble material for water-durable adhesives. The process consists of denaturation of soy flour, followed by modification with formaldehyde and then conversion via co-polymerization with a suitable cross-linking agent into an insoluble material. Both formaldehyde and phenol-formaldehyde are used across-linking agents. The extent of conversion into the cross-linked copolymer was assessed with a 24-h water extraction procedure and via elemental analysis. Soy-based resins with 44–86% conversion of soluble soy flour have been successfully prepared with up to complete conversion of the protein component. These resins were also used to prepare strandboards of comparable performance to a control commercial phenol-formaldehyde resin. A direct relationship between the percentage of soy flour incorporated and the final board performance was obtained.

    Publication Notes

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Wescott, J.M.; Frihart, C.R.; Traska, A.E. 2006. High-soy-containing water-durable adhesives. Journal of adhesion science and technology. Vol. 20, no. 8 (2006): pages 859-873.

    Keywords

    Soy, soybeans, phenol, formaldehyde, wood adhesive, durable adhesive, phenolic resins, adhesives, water repellents, soybean glue, soy flour, phenolic resin glue, bonding

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