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

摘要

The invention relates to a new process for the preparation of silicas, as well as highly structured silicas having the following characteristics: a specific CTAB surface (SCTAB) of between 40 and 525 m2 / g, a specific BET surface (SBET) of between 45 and 550 m2 / g, a width Ld ((d84 - d16) / d50) of size distribution of objects measured by particle size XDC after deagglomeration with ultrasound of at least 0.91 and a porous distribution such that 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 of polymers.