Cured silicone powder and process for the preparation thereof

摘要

There is disclosed a process comprising (I) preparing a water-based dispersion of (A) a cured silicone powder having an average particle diameter of 0.1 to 200 micrometers and (B) an amorphous silica micropowder that has an average particle diameter not exceeding 1 micrometer and a surface silanol group density of at least 2 silanol groups per 100 square angstroms; (II) heating said water-based dispersion; and (III) removing the water from said dispersion, thereby producing a cured silicone rubber composition wherein the silica micropowder is immobilized on the surface of the cured silicone powder.