Back coating glue for high-temperature adhesion prevention coated paperboard and preparation method of back coating glue

The invention discloses a back coating adhesive for high-temperature adhesion prevention coated paperboard and a preparation method thereof.The back coating adhesive prepared through the method is formed by mixing a back coating adhesive A and a back coating adhesive B. The back coating adhesive A is composed of deionized water, polyvinyl alcohol, a defoaming agent, a neutralizing agent and wax emulsion; the B back coating adhesive is composed of deionized water, a hard monomer, a soft monomer, a functional monomer, a cross-linking monomer, an emulsifier, an initiator and a cross-linking agent, two kinds of back coating adhesives are prepared and mixed to form the product, and the product is good in film forming property, high in adhesive adaptability, free of adhesion at high temperature, good in adhesive performance and good in mechanical and moisturizing performance. The back coating adhesive provided by the invention can be widely applied to various occasions such as paper for cigarette cases, paper for m