PROCESS FOR THE PREPARATION OF FUNCTIONALIZED ZINC OXIDE NANOPARTICULATE POWDERS

摘要

The present invention relates to a process for the preparation of surface-modified zinc oxide particles comprising the steps of (i) providing a suspension of Zn(OH)2 particles in an alcoholic medium; (ii) reacting said suspension of Zn(OH)2 particles with an Si-containing surface modifier, whereby a mixture of surface-modified ZnO particles and surface-modified Zn(OH)2 particles suspended in an alcoholic medium is obtained; (iii) drying said mixture of (ii), wherein surface-modified Zn(OH)2 particles are converted to surface-modified ZnO particles during said drying; thereby obtaining dried surface-modified ZnO particles.