Patent ID: 6702888
Filing Date: 2004-03-09
Classification: C01B,C01P,C08K,C09C

Abstract:
A precipitated silica having:a CTAB specific surface of between 140 and 200 m2/g, a BET specific surface of between 140 and 200 m2/g, a DOP oil uptake lower than 300 ml/100 g, a median diameter (Ã˜50), after disintegration with ultrasound, smaller than 3 &mgr;m, an ultrasonic disintegration factor (FD) higher than 10 ml, an aluminum content of between 0.75 and 1.40% by weight, said silica being in a form selected from the group consisting of spherical beads with a mean size of at least 80 &mgr;m, a powder with a mean size of at least 15 &mgr;m, and granules having a length of at least 1 mm along the axis of their larger dimension.