Abstract: Adhesives, methods of producing adhesives, and cellulosic products formed with the adhesive are provided. In an exemplary embodiment, an adhesive includes a protein, a first reactant that has a plurality of isocyanate moieties, and a second reactant with one or more of a chlorohydrin moiety, an azetidinium moiety, and an epoxy moiety. The protein is reacted with the first reactant to form a functionalized protein intermediate, and the functionalized protein intermediate is then reacted with the second reactant.

Abstract: A unitary mat includes a plurality of lignocellulosic particles and an adhesive chosen from an isocyanate, phenol formaldehyde, polyamino amido epichlorohydrin, and combinations thereof. The adhesive is present in an amount of from about 1 to about 10 percent by weight based on 100 parts by weight of dry lignocellulosic particles. The unitary mat also includes a proteinaceous powder having a protein dispersibility index of from about 1 to about 90 and present in an amount of from about 0.5 to about 10 percent by weight based on 100 parts by weight of dry lignocellulosic particles, and an aqueous diluent present in an amount of from about 0.5 to about 10 percent by weight based on 100 parts by weight of dry lignocellulosic particles. The unitary mat may also have a green strength tack test result of greater than 3 inches.

Abstract: Provided are adhesive materials for fire resistant applications, methods of using these adhesive materials on lignocellulosic and other like substrates, and composite materials including lignocellulosic substrates and these adhesive materials. In addition to being fire-resistant, the composites formed from the substrates and adhesive materials may be also durable to moisture. The adhesive materials may include at least one proteinaceous-containing material and at least one magnesium oxychloride material. Other materials may be present as well, in some embodiments. For example, an adhesive material may include a solvent or a vinyl polymer. In some embodiments, water may be used as a solvent and the adhesive material may be referred to as an aqueous adhesive material. Some examples of suitable vinyl polymers include but are not limited to polyvinyl alcohol (PVOH), polyvinyl acetate (PVAc) and vinyl acetate/ethylene (VAE).

Abstract: Provided are adhesive materials for fire resistant applications, methods of using these adhesive materials on lignocellulosic and other like substrates, and composite materials including lignocellulosic substrates and these adhesive materials. In addition to being fire-resistant, the composites formed from the substrates and adhesive materials may be also durable to moisture. The adhesive materials may include at least one proteinaceous-containing material and at least one magnesium oxychloride material. Other materials may be present as well, in some embodiments. For example, an adhesive material may include a solvent or a vinyl polymer. In some embodiments, water may be used as a solvent and the adhesive material may be referred to as an aqueous adhesive material. Some examples of suitable vinyl polymers include but are not limited to polyvinyl alcohol (PVOH), polyvinyl acetate (PVAc) and vinyl acetate/ethylene (VAE).

Abstract: The present invention provides an improved method of producing a stable acid denatured soy/urea adhesive having improved wet and dry strengths, with more efficient production and lower production costs. The method comprises combining urea with soy flour that has been acid treated until denatured and substantially free from urease activity. The soy flour is preferably lowered to a pH of 2.0 to 4.0 for at least 1 minute. Optionally, the method may also include adding a crosslinking agent, diluent or both to the soy flour/urea adhesive and/or adding an emulsified or dispersed polymer. Adhesives and dispersions prepared according to the methods of this invention offer increased stability and strength properties.

Abstract: The present invention provides an improved composition of soy with a non-urea diluent at a pH of less than 5.0, having improved viscosity stability with excellent wet and dry strengths, with more efficient production and lower production costs. Optionally, the composition may also include adding a crosslinking agent, additional diluent or both to the soy-non urea diluent adhesive and/or adding an emulsified or dispersed polymer.

Abstract: The present invention provides an improved method of producing a stable acid denatured soy/urea adhesive having improved wet and dry strengths, with more efficient production and lower production costs. The method comprises combining urea with soy flour that has been acid treated until denatured and substantially free from urease activity. The soy flour is preferably lowered to a pH of 2.0 to 4.0 for at least 1 minute. Optionally, the method may also include adding a crosslinking agent, diluent or both to the soy flour/urea adhesive and/or adding an emulsified or dispersed polymer. Adhesives and dispersions prepared according to the methods of this invention offer increased stability and strength properties.

Abstract: The present invention provides an improved method of producing a stable heat denatured soy/urea adhesive having improved wet and dry strengths, with more efficient production and lower production costs. The method comprises combining urea with soy flour that has been heated until denatured and substantially free from urease activity. The soy flour is preferably heated to a temperature of at least 81° C. up to 100° C. for at least 15 to 500 minutes. Optionally, the method may also include adding a crosslinking agent, diluent or both to the soy flour/urea adhesive and/or adding an emulsified or dispersed polymer. Adhesives and dispersions prepared according to the methods of this invention offer increased stability and strength properties.

Abstract: The present invention provides an improved method of producing a stable urea-denatured soy flour-based adhesive having improved wet and dry strengths, with more efficient production and lower production costs. The method comprises heating soy flour until denatured and then adding urea to the denatured soy flour. The soy flour may be heated up to 40° C. to 100° C. for at least 15 to 500 minutes. Optionally, the method may also include adding a cross-linking agent to the soy flour/urea mixture and/or adding an emulsified or dispersed polymer. Adhesives prepared according to this invention offer increased stability and strength properties.