MAGNETIC TONER Russian patent published in 2017 - IPC G03G9/83 

FIELD: chemistry.

SUBSTANCE: invention discloses a magnetic toner comprising magnetic toner particles containing binder resin and a magnetic component, and inorganic fine particles "a" and organic-inorganic composite fine particles, wherein the magnetic toner has (i) absolute specific gravity of 1.40 g/cm³ or more to 1.70 g/cm³ or less, and (ii) saturation magnetization at a magnetic field of 796 kA/m of 10 Am²/Kg or more to 20 Am²/Kg or less, the inorganic fine particles "a" is metal oxide with a volume resistivity of 1.0×10³ Ohm-cm or more to 1.0×10⁸ Ohm-cm or less, and organic-inorganic composite particles contain resin fine particles and inorganic fine particles "b", embedded in the resin particles, and the inorganic-organic composite fine particles have an absolute specific gravity of 1.50 g/cm³ or more to 1.75 g/cm³ or less.

EFFECT: obtaining of a magnetic toner with superior low-temperature fixing ability and excellent developability, fogging containment and transfer efficiency even in long-term application.

5 cl, 2 dwg, 7 tbl, 24 ex