HYDROPHOBIC METAL OXIDE PARTICLE AND ITS PRODUCTION, AND TONER COMPOSITION FOR ELECTROPHOTOGRAPHY

摘要

PROBLEM TO BE SOLVED: To provide inexpensive metal oxide particles having sufficient hydrophobicity and controlled antistaticity, to provide a method for producing the same, and to provide an electrophotographic toner containing the hydrophobic metal oxide particles and having stable antistaticity and excellent flowability. SOLUTION: The hydrophobic metal oxide particles are obtained by treating the surfaces of metal oxide particles with an epoxy compound and an alkylsilazane. The rings of the epoxy groups on the surfaces of the produced hydrophobic metal oxide particles are thus opened with the decomposition product of the alkylsilazane to introduce amino groups and alkylsilyl groups. The toner composition for electrophotography contains the hydrophobic metal oxide particles.