US 12,435,187 B2
Method for producing resin particle dispersion, method for producing toner for electrostatic image development, and toner for electrostatic image development
Takashi Inukai, Kanagawa (JP); and Keita Yamamoto, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Aug. 25, 2021, as Appl. No. 17/411,663.
Claims priority of application No. 2021-054287 (JP), filed on Mar. 26, 2021.
Prior Publication US 2022/0306815 A1, Sep. 29, 2022
Int. Cl. C08J 3/07 (2006.01); B01F 23/40 (2022.01); B01F 23/41 (2022.01); B01F 23/43 (2022.01); B82Y 40/00 (2011.01); G03G 9/08 (2006.01); G03G 9/12 (2006.01); G03G 9/125 (2006.01); G03G 9/13 (2006.01)
CPC C08J 3/07 (2013.01) [B01F 23/41 (2022.01); B01F 23/43 (2022.01); B01F 23/49 (2022.01); G03G 9/0823 (2013.01); G03G 9/125 (2013.01); G03G 9/132 (2013.01); B01F 23/4142 (2022.01); B01F 23/4146 (2022.01); B01F 23/48 (2022.01); B82Y 40/00 (2013.01); G03G 9/122 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for producing a resin particle dispersion, the method comprising:
obtaining a phase-inverted emulsion by adding a neutralizer to a resin solution prepared by dissolving a resin having an acid value in an organic solvent to thereby neutralize the resin and then adding an aqueous medium to the resulting resin solution to subject the resin to phase inversion emulsification; and
removing the organic solvent from the phase-inverted emulsion,
wherein, in the course of obtaining the phase-inverted emulsion, a maximum agitation power per unit mass (kg) of the resin when the resin solution containing the aqueous medium added thereto is agitated to perform the phase inversion emulsification is from 0.4 W to 20 W inclusive.