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 method of preparing silicas and to highly-structured silicas having the following characteristics: a specific surface area CTAB (SCTAB) of between 40 and 525 m2/g; a specific surface area BET (S¿BET?) of between 45 and 550 m?2¿/g; an object size distribution width Ld ((d84 - d16)/d50), which is measured by XDC particle size analysis after deagglomeration with ultrasound, of at least 0.91; and a pore-size distribution such that ratio V¿(d5-d50)/V(d5-d100)? is at least 0.66. The invention also relates to the use of said silicas as polymer reinforcing fillers.