Soyabean protein adhesive for plywood and method for preparing same

The invention provides a soyabean protein adhesive for a plywood, prepared from the following raw materials according to parts by weight: 70-80 parts of dispersion medium, 20-35 parts of degreased soyabean protein powder, 0.5-3 parts of sodium carbonate, 1-2 parts of complexing agent and 1-5 parts of enhancer. The adhesive provided by the invention has the characteristics that all the components have excellent mutual synergistic effect, a material such as a metal salt is compounded with the soybean protein, and simultaneously, glutaraldehyde is taken as the enhancer so that the problem of poor water resistence of the common soybean protein adhesive is solved; therefore, the adhesive is capable of meeting the waterproof requirement of the adhesive for the plywood and guaranteeing the practical performance of the soybean protein adhesive; and the plywood prepared by using the adhesive provided by the invention is capable of meeting the international requirements of the class II plywood. Besides, the invention also provides a method for preparing the soyabean protein adhesive for the plywood; and the method is simple in process, convenient for operation and suitable for popularization and application.