| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of forming an antifouling coating film that excels in contamination resistance and weatherability that can correspond to a long-term maintenance-free performance, is gentle in environmental point of view because of no use of an organic based solvent, and further includes an overcoat coating film in which an underlayer coating film that is brittle to an organic solvent might not cause the dissolving and the swelling or the like. <P>SOLUTION: The method of forming an antifouling coating film includes: a step in which a coating material for an underlayer coating film is applied on a building base material, and one or more layers of the underlayer coating film are formed; and a step in which a coating composition (A) is applied on the underlayer coating film to form the overcoat coating film whose contact angle to water is 1°-40°. The coating composition (A) includes. as principal ingredients of an overcoat coating material: 0.1-10.0 mass% (on solid content conversion basis) of water dispersion colloidal silica (a); 0.01-1.0 mass% (on solid content conversion basis) of one or more nonionic surfactants (b); and 89-99 mass% of water (c), but does not includes an organic solvent. <P>COPYRIGHT: (C)2013,JPO&INPIT |
