▎ 摘　　要

NOVELTY - Preparation of aqueous nano thermal insulation coating comprises mixing emulsifier and deionized water to obtain emulsified aqueous solution, mixing emulsified aqueous solution, ammonium persulfate and comonomer to obtain solution A, mixing emulsified aqueous solution, ammonium persulfate, comonomer and sodium bicarbonate at 75-80degrees Celsius for 3-4 hours, adding solution A, heating at 85-88degrees Celsius for 1-1.2 hours, cooling to 45degrees Celsius, adjusting pH to 7 to obtain acrylate emulsion, mixing diisocyanate, polyester diol, dihydroxymethylpropionic acid and N, N-dimethylformamide at 65-70degrees Celsius for 8-10 hours to obtain polyurethane prepolymer, mixing polyurethane prepolymer and acrylate emulsion for 6-8h at 70-75degrees Celsius to obtain acrylic polyurethane emulsion, mixing acrylic polyurethane emulsion, dispersant, defoamer and wetting agent for 20-30 minutes, adding film-forming agent and pH regulator, mixing for 20-30 minutes, adding insulation filler and mixing for 30-50 minutes. USE - The method is used for preparation of aqueous nano thermal insulation coating. ADVANTAGE - The introduction of fluorine, silicon monomer, fluorine and silicon monomer into acrylate emulsion improve corrosion resistance of coatings and enhances hydrophobicity, chemical resistance, crosslinking sites between coatings, adhesion of coating to substrate and barrier performance of corrosive medium and increases density of cross linking of components. The method has reasonable process design and appropriate group distribution ratio. The coating has excellent thermal insulation effect, hydrophobic coating surface, excellent corrosion resistance and high practicability. DESCRIPTION OF DRAWING(S) - The drawing shows a coating actual coating effect schematic diagram of the embodiment 1.