Preparation method of shape memory type polyurethane dry adhesive

The invention relates to a preparation method of a shape memory type polyurethane dry adhesive. The preparation method comprises the following steps: 1) adding polyester polyol, an antioxidant, phosphoric acid and DMF into a reaction kettle, uniformly stirring and mixing, adding mono-ethanol amine, and continuing to stir for 30 minutes; 2) adding diphenyl methane diisocyanate, heating to 75-80 DEGC, and reacting until the viscosity of the system reaches 150,000-200,000 cps/DEG C; wherein DMF and a weak polar solvent are added, so that the solid content of the system is 50%; and 3) adding CH3OH to terminate the reactions, stirring for 1h, and discharging. Compared with a common dry adhesive, the shape memory type polyurethane dry adhesive has a better solvent resistant performance, in addition, the technology is simple, the recovery performance is good after dropwise adding the solvent, the application range is wide, and the market potential is huge. 本案涉及一种形状记忆型聚氨酯干法黏结剂的制备方法，包括以下步骤：1)将聚酯多元醇、抗氧剂、磷酸和DMF加入到反应釜中搅拌