SILICON OXIDE POWDER AND PROCESS FOR THE PRODUCTION THEREOF, COSMETICS MADE BY USING THE SAME, MICELLE-RETAINING POWDER, AND PERFUME-RETAINING POWDER

摘要

A non-flaky silicon oxide powder produced by a process comprising the dissolution step wherein a silicate satisfying the relationship: 0 < SiO2/Y2O < 2 (wherein Y is alkali metal) is dissolved in the presence of a cationic surfactant in a concentration of 0.1 to 5.0 M at a pH of 11 or above, the condensation step wherein the pH is adjusted to 10.5 or below to form micelle bars from the cationic surfactant and the silicate is precipitated on the bars, and the removal step wherein the cationic surfactant is removed from the micelle-shaped precipitate having a shell made of the silicate. The powder is useful as the carrier for cosmetics, drugs and perfumes.