| abstract |
PROBLEM TO BE SOLVED: To adjust desired hardness or softness and light elongation in accordance with the degree of feeling required for cosmetics to be blended. SOLUTION: The spherical composite particles can be obtained by spray-drying a dispersion in which inorganic fine particles and resin fine particles having a predetermined particle diameter are dispersed in water and / or an organic solvent. The obtained spherical composite particles may be further subjected to a heat treatment at a temperature equal to or higher than the glass transition point of the resin. To increase flexibility, resin fine particles made of a resin having rubber-like elasticity are used. As inorganic fine particles, silica, alumina, titanium oxide, Examples include oxide fine particles such as zirconia, zinc oxide, iron oxide, cerium oxide, and magnesium oxide, and fine particles of a composite oxide thereof. |