Patent ID: 6214912
Filing Date: 2001-04-10
Classification: C01B,C01P,C08K

Abstract:
A mechanically strong, vulcanized elastomeric matrix having a reinforcing filler material homogeneously dispersed and distributed therethrough, said reinforcing filler material comprising finely divided precipitated silica particulates and said precipitated silica particulates deriving from a powder having a CTAB specific surface ranging from 100 to 140 m.sup.2 /g, a median diameter .phi..sub.50, after ultrasonic disintegration, less than 2.8 .mu.m, exhibiting an ultrasonic disintegration factor F.sub.D greater than 3 ml, having a BET specific surface ranging from 100 to 200 m.sup.2 /g, having a mean particle size greater than 15 .mu.m, a packing density in the tamped state of at least 0.17, and a DOP oil uptake ranging from 150 to 400 ml/100 g.