received by the International Bureau on 1 1 March 2014 (1 1.03.2014).

1. A process, and the product resulted therein, of silica-added rubber compounds / composites, at any content in the range from 5 to 200 prh, wet route, where a composition containing latex, alkaline silicate and additives, appropriately stabilized is fed simultaneously with acid in the reactor ("in situ" precipitation), under well defined pH (typically 9), temperature (typically 85°C) , time {typically 70 minutes) and vigorous stirring conditions, characterized by the fact that the precipitation of the silica occurs first with morphological properties controlled by these conditions and later coagulation of the resulting latex composition, where the silica becomes homogeneously distributed and totally incorporated in the rubber clots / lumps and whose prepared compounds present extremely elevated physical-chemical properties.