Patent ID: 8282991
Filing Date: 2012-10-09
Classification: B82Y,C01B,C01P,C08J,C08K,C09C,Y10T

Abstract:
1. A process for producing hydrophobized silicon oxide-coated metal oxide particles, which comprises: (a) adding a silicon oxide precursor to a dispersion of metal oxide particles to form a silicon oxide film on the surface of metal oxide particles thereby to obtain a dispersion of silicon oxide-coated metal oxide particles, (b) adding a compound represented by the following formula (1) or (2) and a silicon oxide precursor to the above dispersion of silicon oxide-coated metal oxide particles thereby to obtain a dispersion of primarily hydrophobized silicon oxide-coated metal oxide particles, in the above formulae (1) and (2), R (c) adding a silanol-protective agent to the above dispersion of primarily hydrophobized silicon oxide-coated metal oxide particles thereby to obtain a dispersion of secondarily hydrophobized silicon oxide-coated metal oxide particles, and (d) drying the above secondarily hydrophobized silicon oxide-coated metal oxide particles thereby to obtain the hydrophobized silicon oxide-coated metal oxide particles.