The invention discloses a building external wall temperature-change-resistant anti-oxidative color
coating, which is prepared from the following raw materials in parts by weight: 20 to 25 parts of carboxylic waterborne
polyurethane, 19 to 24 parts of pure
silicon resin
emulsion, 11 to 16 parts of
cobalt blue, 10 to 15 parts of mill base, 8 to 12 parts of
bentonite, 7 to 11 parts of
mica powder, 6 to 10 parts of kaolin, 5 to 9 parts of talcum
powder, 12 to 14 parts of
sodium carbonate, 9 to 11 parts of
sodium tripolyphosphate, 10 to 12 parts of polyoxyethylene aliphatic ester, 8 to 10 parts of
sodium polyacrylate, 13 to 16 parts of sheet
zinc powder, 7 to 11 parts of aluminum
hydroxide, 5 to 8 parts of
silicon nitride, and 30 to 35 parts of deionized water. A preparation method comprises the following steps of S1, adding the carboxylic waterborne
polyurethane, the pure siliconresin
emulsion, the
cobalt blue, the mill base and the deionized water into a stirrer, and stirring with the stirring speed of 30 to 40rpm for 20 to 30min at the temperature of 40 to 50 DEG C; S2, adding the sheet
zinc powder, the aluminum
hydroxide and the
silicon nitride for stirring with the stirring speed of 100 to 150rpm for 5 to 10min. The building external wall temperature-change-resistant anti-oxidativecolor
coating provided by the invention has excellent temperature alternating resistance and
oxidation resistance, has high tensile strength and favorable flexibility, and is simple in preparation process, convenient to use, and low in cost.