Potassium-zirconium-carbonate cross-linking water-resistant agent and preparing method thereof

The invention discloses a potassium-zirconium-carbonate cross-linking water-resistant agent and a preparing method thereof. The preparing method includes the following steps that water is added into potassium carbonate, and a potassium carbonate solution is prepared; the potassium carbonate solution is heated to 20 DEG C to 70 DEG C; under the stirring effect, zirconium basic sulfate is added intothe potassium carbonate solution, and the mass ratio of the zirconium basic sulfate to the potassium carbonate is 1:(0.47-0.8); the mixture is reacted for 0.5 h to 8 h, then filtering is carried out,and the obtained filtrate is the potassium-zirconium-carbonate cross-linking water-resistant agent. Potassium zirconium carbonate has high chemical activity, solidification is easy when the potassiumzirconium carbonate serves as a water-resistant cross-linking agent of a paper coating, coating solidification is rapid, and paper products have good water resistance without long-term storage or multi-section drying after mac