Patent ID: 8389617

Claim:
A silica comprising: a structurally modified silica comprising at least one of a dimethylsilyl group and a monomethylsilyl group on a surface of the structurally modified silica, wherein the structurally modified silica is obtained by a process comprising reacting a pyrogenic silica with a cyclic polysiloxane to form silanized silica, and carrying out a subsequent structural modification of the silanized silica, the cyclic polysiloxane is represented by a formula, —[O—Si(R 2 )] n —, where R is a C1 to C6 alkyl group and n is 3 to 9, and the cyclic polysiloxane is reacted with the pyrogenic silica at a temperature in the range of from 350° C. to 600° C., and the temperature is determined based on the ratio of an amount of the dimethylsilyl group to an amount of the monomethylsilyl group on the surface of the structurally modified silica.