Method for modifying isocyanate adhesive by using microwave-acidolysis starch

The invention discloses a method for modifying an isocyanate adhesive by using microwave-acidolysis starch, which comprises the following steps: mixing starch and deionized water to prepare a suspension, adding an inorganic acid solution, carrying out microwave radiation to strengthen the acidolysis effect of acid on the starch, centrifuging, washing, drying and crushing the product to obtain microwave-acidolysis treated starch; the starch subjected to microwave-acidolysis treatment is fully wetted, then isocyanate glue (MDI), talcum powder and paraffin emulsion are added, forced physical mixing is conducted through a high-speed homogenizer, and the starch modified formaldehyde-free type artificial board adhesive is obtained. The molecular weight of the starch is reduced through a microwave synergistic acidolysis means, series of starch with different molecular weights and high-reaction-activity hydroxyl groups can be obtained, a three-dimensional network structure is formed through chemical reaction of-NCO o