Unsaturated siloxane group phosphate emulsion concrete curing agent and preparation method thereof

The invention relates to an unsaturated siloxane group phosphate emulsion concrete curing agent and a preparation method thereof. The curing agent comprises the following raw materials in percentage by mass: 10-55% of unsaturated siloxane group phosphate, 0-30% of unsaturated acid, 5-40% of unsaturated acid ester, 5-10% of an emulsifying agent, 0.1-0.5% of a catalyst, 0.1-0.5% of an initiating agent, 1-3% of a coalescing agent, 0.1-0.5% of a thickening agent, 1-3% of a leveling agent, 0.01-0.3% of a defoaming agent and the balance of water. The preparation method comprises the following steps: under the condition that the temperature is 60-90 DEG C, dropwise adding each of the unsaturated siloxane phosphate, the unsaturated acid, the unsaturated acid ester and the initiating agent into the water containing the emulsifying agent and the catalyst, and finishing the dropwise adding in 3 hours; and adding the coalescing agent, the thickening agent, the leveling agent and the defoaming agent into the synthesized polymer emulsion to obtain a curing agent finished product. The curing agent is moderate in hydrophobicity and good in water-retaining property, the preparation method of the curing agent is simple and convenient to operate, the condition is easy to control, the curing agent is stable in performance, and the industrial production of the curing agent can be easily realized.