| 摘要 |
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 140-200 m<2>/g, a BET specific surface area of 140-200 m<2>/g, a DOP oil absorption of less than 300 ml/100 g, a mean diameter after ultrasonic disintegration of less than 3 mu m, an ultrasonic disintegration factor of more than 10 ml, and an aluminium content of at least 0.35 wt %. Furthermore, the use of said silicas as reinforcing fillers for elastomers is disclosed.
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