Patent ID: 7972431
Filing Date: 2011-07-05
Classification: C01P,C09C

Abstract:
1. A surface-modified, potassium oxide-doped, fumed silica, comprising: 0.000001-40% by weight of potassium oxide; wherein a BET surface area is 25 to 400 m an average primary particle size is 5 to 50 nm, a carbon content is 0.1 to 10% by weight, and wherein the surface modified potassium oxide doped fumed silica is obtained by surface modification of a potassium oxide doped fumed silica having a pH of a 4% aqueous dispersion in water of less than 5, a DBP number of greater than 305 g/100 g, and a ratio of the DBP number to a BET surface area equal to or greater than 1.14.