| abstract |
A novel method for preparing precipitated silica having a good dispersibility and highly satisfactory reinforcing properties is disclosed. Novel precipitated silicas in the form of a powder, substantially spherical beads or granules are also disclosed. Said silicas are characterised in that they have a CTAB specific surface area of 100-240 m2/g, a DOP oil absorption of less than 300 ml/100g, a pore distribution such that the pore volume consisting of pores with a diameter of 175-275 Å is less than 50 % of the pore volume consisting of pores with a diameter of at most 400 Å, a mean diameter after ultrasonic disintegration of less than 5 νm, and an aluminium content of at least 0.35 wt.% Furthermore, the use of said silicas as reinforcing fillers for elastomers is disclosed. |