Ultrahigh-viscosity and high-sunlight-reflection-ratio waterproof and heat insulation coating and preparation method thereof

The invention provides ultrahigh-viscosity and high-sunlight-reflection-ratio waterproof and heat insulation coating and a preparation method thereof and relates to a waterproof and heat insulation coating and a preparation method thereof. The ultrahigh-viscosity and high-sunlight-reflection-ratio waterproof and heat insulation coating is prepared from water, hollow ceramic microspheres, titaniumwhite powder, a dispersant, ultraviolet crosslinking acrylic emulsion, silicon resin, a film forming auxiliary agent, a mildew-proof auxiliary agent, a de-foaming agent, a pH (Potential of Hydrogen) regulator and a rheological modifier premix. The method comprises the following steps: adding raw materials into a reaction kettle and stirring the raw materials while adding to obtain a mixture; regulating the pH value and adding the rheological modifier premix; mixing a liquid phase at a low speed; decompressing and distilling to remove water, so as to obtain the coating. According to the ultrahigh-viscosity and high-sunlight-reflection-ratio waterproof and heat insulation coating provided by the invention, the coverage capability of the coating is greatly improved so that the minimum thickness for covering a substrate is reduced and reaches 0.5 to 0.8mm. The sunlight reflection ratio of the coating can reach 0.92 under the thickness. The preparation method is used for preparing the high-performance waterproof and heat insulation coating.