PRECIPITATED SILICAS, PROCESS FOR PRODUCING SAME AND THEIR USE

摘要

A process for producing silicas having a cleaning, polishing and thickening effect and being intended for use as dentifrices. This process is characterized in that the silicas obtained in a conventional manner by precipitation and having varying particle sizes and particle densities are homogeneously mixed with each other in the suspension phase and that the mixtures are further treated in the usual manner by filtering, drying and grinding.