Antifouling nano exterior wall coating and preparation method thereof

The invention discloses an antifouling nano exterior wall coating and a preparation method thereof. The antifouling nano exterior wall coating is composed of the following components: 10-20% of water, 15-30% of rutile titanium dioxide, 0-15% of wollastonite powder, 0-5% of calcined kaolin, 30-60% of nano core-shell composite emulsion, 1-5% of coalescing agent, 0.5-2% of anti-freezing agent and 2.2-5.8% of small-dosage additive. The antifouling nano exterior wall coating and the preparation method thereof disclosed by the invention have the advantages that: 1. inorganic nano particles in the coating disclosed by the invention replace a part of polymers, thereby greatly reducing the use of organic oil resources, lowering the cost and improving the comprehensive performance of the coating; and 2. various performance indexes of the coating disclosed by the invention can meet the requirements of national standard GB/T9755-2001 superior products, the coating especially has excellent water resistance, alkali resistance, stain resistance and artificial aging resistance, and the wash resistance frequency of the coating is more than 10000.