Patent ID: 8435474

Claim:
A particle composition comprising metal oxide particles surface-treated with at least one alkoxysilane compound, which surface-treated metal oxide particles are hydrophobic, non-aggregated, and have a tap density of about 110 g/l to about 420 g/l, and a BET surface area of about 200 m 2 /g or less, and wherein a solid-state Si nuclear magnetic resonance spectrum of the surface-treated metal oxide particles exhibits a ratio T3:T2 of about 2 or more, wherein T2 is the integrated intensity of a peak having a chemical shift in the CP/MAS 29 Si NMR spectrum centered within the range of −56 ppm to −59 ppm, and wherein T3 is the integrated intensity of a peak having a chemical shift in the CP/MAS 29 Si NMR spectrum centered within the range of −65 ppm to −69 ppm.