US 12,291,609 B2
Method for producing resin particles and method for producing toner
Yuya Kato, Minamiashigara (JP); Takahiro Yamashita, Minamiashigara (JP); and Takahisa Tatekawa, Minamiashigara (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Apr. 21, 2023, as Appl. No. 18/304,909.
Claims priority of application No. 2022-185239 (JP), filed on Nov. 18, 2022.
Prior Publication US 2024/0174819 A1, May 30, 2024
Int. Cl. C08J 3/12 (2006.01); C08K 5/00 (2006.01); G03G 9/08 (2006.01); G03G 9/087 (2006.01); G03G 9/09 (2006.01)
CPC C08J 3/12 (2013.01) [C08K 5/0041 (2013.01); G03G 9/0804 (2013.01); G03G 9/0819 (2013.01); G03G 9/08755 (2013.01); G03G 9/0906 (2013.01); C08J 2367/00 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for producing resin particles, the method comprising:
a first step of mixing a binder resin and a dye at temperature T that satisfies formula (1) below to thereby obtain a mixture; and
a second step of emulsifying the mixture, a basic compound, a water-based solvent, and a surfactant to thereby obtain a resin base particle dispersion,
wherein the first step is performed before the second step:
the melting point T1 of the dye≤the temperature T≤the thermal decomposition temperature T2 of the binder resin.  Formula (1)