G - Physics – 03 – G
Patent
G - Physics
03
G
96/56
G03G 9/08 (2006.01)
Patent
CA 2013199
ABSTRACT There is disclosed a method of producing 3 toner particles for use in eloctrophotography which comprises: suspending a radical polymerizable monomer which contains carbon black as a colorant and a charge controlling agent therein in an aqueous phase: suspension polymerizing She monomer to provide spherical polymer particles of 1-30 µm in diameter; treating the suspension containing the polymer particles with a continuous, wet type, agitation mill, to deform the polymer particles. A further method of producing toner particles is disclosed which comprises: producing spherical polymer particles by suspension polymerization of a monomer; making finely divided triboelectric or electroconductive particles or both onto the surface of the polymer particles; and then mechanically pressing the polymer particles to deform the polymer particles as well as to fix the particles on the surface of the polymer particles. A still further method of producing toner particles is disclosed which comprises: producing spherical polymer particles of 20-300 µ m in diameter by suspension polymeri- zation of a monomer: and then crushing and classifying the polymer particles into toners of 1-30 µ m in size preferably after deforming the polymer particles.
Miki Takashi
Nagami Harushi
Uchino Mitsuhiro
Yamashiro Jiro
Bando Chemical Industries Ltd.
Fetherstonhaugh & Co.
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