METHOD FOR PRODUCING TONER PARTICLE

摘要

A method for producing a toner particle having high charging stability and durability under environments at high temperature and high humidity is provided.;A method for producing a toner particle including an step of adhering a resin particle to surface of a toner base particle containing a binder resin and a colorant in an aqueous medium, wherein the resin particle contain a resin having an ionic functional group and having an acid dissociation constant pKa of 6.0 or more and 9.0 or less, and the pH (hydrogen ion concentration) of the aqueous medium is equal to or greater than pKa of the resin particle−2.0.

主权项

1. A method for producing a toner particle, comprising a step of adhering a resin particle to a surface of a toner base particle in an aqueous medium, the toner base particle containing a binder resin and a colorant,
wherein the resin particle contains a resin A, the resin A (i) having an ionic functional group, and (ii) satisfying the following relationship
6.0≦pKa(A)≦9.0 where the acid dissociation constant of the resin A is defined as pKa(A), and wherein when a pH of the aqueous medium at the start of the step is defined as pH(W), the pKa(A) and the pH(W) satisfy a following formula:
pH(W)≧pKa(A)−2.0.