Waterproof building external wall coating

The invention discloses a waterproof building external wall coating. The waterproof building external wall coatingis prepared from the following components in parts by weight: pure acrylic emulsion, methacrylic acid emulsion, alkyd resin, silica sol, defoamer, titanium dioxide nanometer powder, 2-hydroxyl-4-n-octyloxy-benzophenone, cyclohexanone-oxime, modified kaolin clay, titanium dioxide, sepiolite, methylsilicone oil, methyl alkoxy silicone oil, octyltriethoxysilane, silane quaternary ammonium salt, surfactants, and mildew preventive. According to the waterproof external wall coating, a waterproof agent with good waterproof performance is introduced, so that the external wall coatingishigh in waterproof performance. 本发明公开了防水型建筑用外墙涂料，包括以下重量份数的组分：纯丙乳液、甲基丙烯酸乳液、醇酸树脂、硅溶胶、消泡剂、二氧化钛纳米粉、2-羟基-4-正辛氧基二苯甲酮、环己酮肟、改性高岭土、钛白粉、海泡石、甲基硅油、甲基烷氧基硅油、辛基三乙氧基硅烷、硅烷季铵盐、表面活性剂、防霉剂。本发明防水型建筑用外墙涂料引入了防水性能好的防水剂，使得外墙涂料具有强的防水性能。