| abstract |
A colloidal particle dispersion is disclosed, comprising mainly (1) a fumed silica or fumed aluminum silicate, (2) a colloidizing agent (aid) which is at least one compound selected from the group consisting of a phosphoric acid compound, a molybdic acid compound, a boric acid compound, and a silicic acid compound, and (3) water, and a method for preparing the same is disclosed. n Further, a water-based coating composition is disclosed, which comprises a water-based coating composition and incorporated therein a colloidal particle dispersion comprising mainly (1) fumed silica or fumed aluminum silicate, (2) a colloidizing agent (aid) which is at least one compound selected from the group consisting of a phosphoric acid compound, a molybdic acid compound, a boric acid compound, and a silicic acid compound, and (3) water, and a method for preparing the same is disclosed. n Furthermore, the coating method with which the above water-based coating composition on a metal substrate is disclosed. |