Preparation method of aluminum oxide waterproof paper

The invention discloses a preparation method of aluminum oxide waterproof paper and belongs to the field of waterproof paper. The preparation method of the aluminum oxide waterproof paper comprises the following steps of mixing sodium p-styrene sulfonate, zirconium oxide, calcium oxide and magnesium oxide, adding the mixture into polylactic acid, increasing the temperature to 40-50 DEG C and uniformly mixing the mixture; then adding in calcium phosphate, p-tert-butylphenol, barium sulfate, titanium dioxide, aluminum oxide and water, continuing to increase the temperature to 60-70 DEG C, and unfirmly mixing the mixture; spraying the solution above onto the surface of paper, and drying the paper inside a drying oven to obtain the aluminum oxide waterproof paper. The preparation method of thealuminum oxide waterproof paper is large in contact angle, low in rolling angle and good in waterproofness. Due to the added p-tert-butylphenol, the waterproof performance of the aluminum oxide waterproof paper can be increa