Patent ID: 11934146
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A method for producing a toner comprising the steps of:
(i) forming particles containing a polymerizable monomer and a wax in an aqueous medium;
(ii) polymerizing the polymerizable monomer in the particles to form toner particles;
(iii) holding a dispersion liquid in which the toner particles are dispersed in a temperature range of Ta+15 (° C.) to Ta+35 (° C.), wherein Ta is a crystallization peak temperature of the wax, and then cooling the dispersion liquid from a temperature in the range of Ta+15 (° C.) to Ta+35 (° C.) to a temperature in a range of Ta−35 (° C.) to Ta−20 (° C.), with a cooling rate of 40.0° C./min to 200.0° C./min;
(iv) annealing the dispersion liquid obtained in the step (iii) by holding the dispersion liquid in the temperature range of Ta−35 (° C.) to Ta−20 (° C.) for 30 minutes or more;
(v) removing the toner particles from the dispersion liquid resulting from the step (iv); and
(vi) externally adding inorganic fine particles to the toner particles in the temperature range of Ta−35 (° C.) to Ta−20 (° C.).