Back to results
US 7,678,520 B2Granted
Method for producing electrophotographic toner and electrophotographic toner
AssigneeKonica Minolta Holdings, Inc.
InventorsKoji Daifuku, Kaori Ono
Life of this patent
Estimating the term…
Abstract
A method for producing an electrophotographic toner comprising the steps of: (1) mixing a water-insoluble organic solvent, an oil-soluble dye capable of chelating with a metal, a metal compound and water to form an oil-soluble dye dispersion, (2) removing the organic solvent from the oil-soluble dye dispersion to form colored microscopic particles, and (3) adding an emulsion thermoplastic resin to the colored microscopic particles so as to associate the particles with slow coagulation.
Claims12
A method for producing an electrophotographic toner comprising the steps of:
- (1) mixing a water-insoluble organic solvent, an oil-soluble dye capable of chelating with a metal, a metal compound and water to form an oil-soluble dye dispersion,
- (2) removing the organic solvent from the oil-soluble dye dispersion to form colored microscopic particles, and
- (3) adding an emulsion of a thermoplastic resin to the colored microscopic particles so as to associate the particles with slow coagulation;
- wherein the oil-soluble dye dispersion further comprising a resin having different compositions from the thermoplastic resin in the step (1) and the colored microscopic particle containing the resin having different compositions from the thermoplastic resin is formed in the step (2).
1 more element
Dependencies are inferred from the claim text.