Patent ID: 6287994
Filing Date: 2001-09-11
Classification: C04B,Y10S

Abstract:
A blend comprising a gelled colloid and a filler, which blend comprises between about 10 weight percent and about 40 weight percent of the filler and between about 60 weight percent and about 90 weight percent of the gelled colloid, which gelled colloid has a viscosity above about 5,000 centipoise and comprises a colloidal blend of an anionically stabilized colloidal silica and a cationically stabilized colloidal alumina, with the anionically stabilized colloidal silica comprising from about 20 weight percent to about 65 weight percent of the gelled colloid, and the cationically stabilized colloidal alumina comprising from about 35 weight percent to about 80 weight percent of the gelled colloid.