Process for producing toner for electrophotography
AssigneeHitachi Chemical Company, Ltd.
InventorsRyoji Tan, Shigeyoshi Tanaka, Ken-ichi Kishi, Yasuyuki Iguchi, Takeo Kudo, Takashi Amano, Hideki Kohno
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Abstract
A toner for electrophotography produced by polymerizing a monomer dispersed by emulsification in the presence of a colorant and/or a magnetic powder, followed by coagulation is excellent in properties, particularly in cleaning properties, charge stability and caking resistance.
Claims15
A process for producing a toner for electrophotography which comprises polymerizing a polymerizable monomer dispersed by emulsification in the presence of a colorant and/or a magnetic powder to prepare a principal resin component, effecting the coagulation of the resulting polymerization liquid by adding a coagulating agent in such a way that the particles in the liquid after coagulation have diameters suitable as a toner, and then heating the resulting coagulated liquid at a temperature no lower than the glass transition point of the principal resin component after coagulation.
A process for producing a toner for electrophotography which comprises polymerizing a polymerizable monomer dispersed by emulsification in the presence of a colorant and/or a magnetic powder to prepare a principal resin component, effecting the coagulation of the resulting polymerization liquid by adding a coagulant in such a way that the particles in the liquid after coagulation have diameters suitable as a toner, and then heating the resulting coagulated liquid at a temperature not lower than the glass transition point of the principal resin component after coagulation.
Dependencies are inferred from the claim text.