US 12,066,789 B2
Method for producing toner for developing electrostatic charge image, toner for developing electrostatic charge image, and electrostatic charge image developer
Daisuke Noguchi, Kanagawa (JP); Atsushi Sugawara, Kanagawa (JP); Yuji Isshiki, Kanagawa (JP); and Hiroshi Nakazawa, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Aug. 10, 2021, as Appl. No. 17/398,149.
Claims priority of application No. 2021-046473 (JP), filed on Mar. 19, 2021.
Prior Publication US 2022/0299895 A1, Sep. 22, 2022
Int. Cl. G03G 9/08 (2006.01)
CPC G03G 9/0804 (2013.01) [G03G 9/0815 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing a toner for developing an electrostatic charge image, the method comprising:
mixing at least one flocculant into a liquid dispersion containing binder-resin particles by adding the flocculant into the liquid dispersion containing binder-resin particles while circulating the liquid dispersion containing binder-resin particles between a stirring vessel and a disperser that applies a mechanical shear force;
forming aggregated particles by heating the liquid dispersion with the flocculant therein after reducing viscosity of the liquid dispersion; and
forming toner particles by heating the liquid dispersion containing the aggregated particles and thereby making the aggregated particles fuse and coalesce,
wherein the reducing the viscosity of the liquid dispersion comprises adding water and/or a surfactant to the liquid dispersion after mixing the flocculant.