Base Material For Waterproof Wall And Floor And Preparation Method Therefor

A base material for a waterproof wall and floor, comprising:

• a base plate and melamine decorative paper, wherein the base plate and the melamine decorative paper are bonded by an adhesive, and the base plate is prepared by the following steps:
• step 1:
• pretreatment of a waste circuit board:
• taking an extracted glass fiber cloth and dried circuit board powder as raw materials;
• step 2:
• after mixing modified cardanol, polyether polyol, hydroxyl-terminated branched polysiloxane and a molecular sieve, dehydrating the mixture at a temperature of 110-120° C. under a vacuum condition until a moisture content is less than 1000 ppm to obtain a component A;
• mixing isocyanate, polyether polyol, polyester polyol and a chain extender, stirring and reacting at a temperature of 85-90° C., and controlling a content of NCO % to be 15-20% to obtain a component B;
• mixing the component A and the component B to obtain an adhesive;
• performing hot melting and wire drawing on the glass fiber cloth to prepare a fiber net;
• mixing the circuit board powder and a sizing agent, then paving the mixture layer by layer with the fiber net, prepressing the mixture, and then hot-pressing the mixture to form the base plate.