The disposal of more than 1 x 109 pounds of excess dry whey permeate (deproteinized whey/lactose) from the cheese industry represents a serious economic and environmental problem in the United States. This paper explores the feasibility of preparing a formaldehyde-free whey-based resin that incorporates diamines and diisocyanates in resin formulations for use as plywood adhesives. Results indicate that such a formulation is feasible that yields high wet shear strengths in Southern Pine plywood. Up to 38% whey ingredients may be incorporated in the formulation, before significant loss in strength is observed.
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