| 摘要 |
PROBLEM TO BE SOLVED: To provide surface organic resin-coated hydrophobic spherical silica fine particles and a production method of the fine particles, in which dispersibility in a toner and falling property from a toner can be improved, and a toner external additive for electrostatic charge image development using the fine particles.SOLUTION: The surface organic resin-coated hydrophobic spherical silica fine particles have an average particle diameter of 0.01 to 5 μm in primary particles in terms of a volume-based median diameter, in which at least a part of the particle surface is coated with an organic resin coating having a glass transition temperature of 65 to 120°C. |
