NOVEL METHOD FOR PREPARING PRECIPITATED SILICA, PRECIPITATED SILICA HAVING PARTICULAR MORPHOLOGY, GRADING AND POROSITY, AND USE THEREOF PARTICULARLY FOR REINFORCING POLYMERS

摘要

The invention relates to a method for preparing precipitated silica, and to precipitated silica including clusters of large primary silica particles having at the surface thereof small primary silica particles, wherein said silica has: a specific surface area CTAB (SCTAB) of 60 to 400 m2/g; a cluster average size d50, as measured by XDC grading after ultrasound de-agglomeration, such that d50 (nm) > (6214 / SCTAB (m2/g)) + 23; a porous volume distribution such that V(d5 - d50) / V(d5 - d100) > 0.906 - (0,0013 x SCTAB (m2/g)); and a pore size distribution such that Mode (nm) > (4166 / SCTAB (m2/g)) - 9.2. The invention also relates to the use of the silica as reinforcing filler for polymers.