Abstract: In order to ensure the stability and optimize the bonding properties of ceramic tile adhesives, the preparation method with vacuum technology and properties of new material ceramic tile adhesive combined were studied. The concrete surface test blocks for tile bonding according to standard tile sizes were prepared, and waterproof materials were applied to them according to indoor decoration construction scenarios. Ceramic tile adhesive prepolymer was prepared by vacuum synthesis of potassium hydrogen phthalate and toluene diisocyanate. The adhesive prepolymer was modified through Michael addition reaction to reduce biological toxicity. A vacuum drying oven was used to dry the modified adhesive prepolymer, regulating the drying process to obtain the initial adhesive product. Vacuum drying oven and circulating water vacuum pump were used to eliminate water and air interference, ensuring that the adhesive can be prepared completely in the vacuum stable state. The experimental results indicate that the Fourier transform infrared spectrum of the adhesive contains a large number of azide groups and has low biological toxicity. The contact angle between the adhesive and the surface of ceramic tiles and concrete is less than 90°. When the strain is 8%-11%, the mechanical property of the adhesive is better. When the environment temperature is below 180 ℃, the thermal stability of the adhesive is better. The application of the newly prepared ceramic tile adhesive in the field of indoor decoration construction is relatively environmentally friendly. In a vacuum stable state, the interaction between the adhesive and ceramic tile molecules is less affected by air and water molecules, and the adhesion performance is better.

Key words: adhesive preparation, vacuum stable state, vacuum drying, indoor decoration construction, new material, ceramic tile adhesive