METHOD OF PREPARING SILICAS, SILICAS WITH SPECIFIC PORE-SIZE AND/OR PARTICLE-SIZE DISTRIBUTION AND THE USE THEREOF, IN PARTICULAR FOR REINFORCING POLYMERS

摘要

The invention relates to a novel process for the preparation of silicas, as well as highly structured silicas having the following characteristics: a CTAB specific surface (SCTAB) of between 40 and 525 m2 / g, a BET specific surface (SBET) of between 45 and 550 m2 / g, a width Ld ((d84 -d16) / d50) of object size distribution measured by XDC particle size distribution after ultrasonic deagglomeration of at least 0.91 and a pore distribution such as the ratio V (d5-d50) / V (d5-d100) is at least 0.66. It also relates to the use of these silicas as reinforcing fillers for polymers.