| abstract |
[PROBLEMS] To provide long-term maintenance-free, excellent contamination resistance and weather resistance, and because it does not use organic solvents, it is environmentally friendly, and undercoating films that are fragile to organic solvents do not cause dissolution or swelling. A method for forming an antifouling coating film provided with an overcoat coating film is provided. A step of applying a base coating film on a building substrate to form one or more layers of the base coating film, and (a) a main component of the overcoat coating on the base coating film; ) Water-dispersed colloidal silica (in terms of solid content) 0.1 to 10.0% by mass, (b) one or more nonionic surfactants (in terms of solid content) 0.01 to 1.0% by mass, c) A step of forming an overcoat coating film containing 89 to 99% by mass of water and not containing an organic solvent (A) by applying a coating composition and having a contact angle with water of 1 ° to 40 °. A method for forming an antifouling coating film. [Selection figure] None |