Surface-treated metal oxide particles

Details Surface-treated metal oxide particles Surface-treated metal oxide particles

2007-08-31

2011-10-04

Johnson, Edward (Department: 1736)

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

C423S600000, C423S625000

Reexamination Certificate

active

08029761

ABSTRACT:
The invention provides surface-treated metal oxide particles. The surface-treated metal oxide particles have specific ratios of (1) the integrated area of the resonance signals with chemical shifts in the range from −4 ppm to −33 ppm to the integrated area of the resonance signals with chemical shifts in the range from −33 ppm to −76 ppm and (2) the integrated area of the resonance signals with chemical shifts in the range from −76 ppm to −130 ppm to the integrated area of the resonance signals with chemical shifts in the range from −33 ppm to −76 ppm in the CP/MAS29Si NMR spectrum. The invention further provides a toner composition for electrophotographic image formation comprising toner particles and surface-treated metal oxide particles.

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