NOVEL METHOD FOR PREPARING PRECIPITATED SILICAS, NOVEL PRECIPITATED SILICAS AND THEIR USES, IN PARTICULAR FOR STRENGTHENING POLYMERS.

摘要

The invention concerns a novel method for preparing a precipitated silica, wherein: a silicate is reacted with an acidifying agent so as to obtain a precipitated silica suspension; the precipitated silica suspension is filtered in order to obtain a filter cake; the filter cake is subjected to a disintegration operation involving the addition of an aluminium compound; following the disintegration operation, a drying step is carried out. The invention is characterized in that, during or after the disintegration operation, a mixture of polycarboxylic acids is added to the filter cake. The invention also concerns novel precipitated silicas and their uses.