Patent ID: 8703163

Claim:
A method for preparing water repellent fine particles comprising the steps of providing a dispersion of silicone elastomer spherical particles having a volume mean particle size of 0.1 to 100 μ in water using a surfactant, adding an organotrialkoxysilane to the dispersion and effecting hydrolytic condensation reaction thereof in the dispersion in the presence of an alkaline substance for coating the silicone elastomer particles with polyorganosilsesquioxane, adding a tetraalkoxysilane and at least one silylating agent selected from trimethylalkoxysilane, trimethylsilanol and hexamethyldisilazane to the dispersion and effecting hydrolytic condensation reaction thereof in the dispersion, and washing the coated particles with alcohol or a mixture of alcohol and water to remove the surfactant, thereby obtaining the water repellent fine particles being non-dispersible in water and floatable on water.