Patent ID: 11914325
Assignee: CANON KABUSHIKI KAISHA
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 6:
7. A method for producing a toner, comprising the steps of:
a step of melt kneading raw materials comprising a binder resin and a wax; and
a step of pulverizing an obtained melt-kneaded product, wherein
the toner comprises a toner particle comprising the binder resin and the wax, the binder resin comprising an amorphous polyester resin and a polymer A,
a content of the amorphous polyester resin in the binder resin is at least mass %, and a content of polymer A in the binder resin is 0.10 to 10.00 mass %,
polymer A comprises a first monomer unit comprising a structure represented by formula (1) and a second monomer unit that is different from the first monomer unit, , where RZ1 denotes a hydrogen atom or a methyl group, and R denotes an alkyl group comprising 18 to 36 carbon atoms,
the second monomer unit being represented by formula (2), , where X denotes a single bond or an alkylene group comprising 1 to 6 carbon atoms, R1 is —COOR11 (R11 denotes a hydroxyalkyl group comprising 1 to 6 carbon atoms), and R2 denotes a hydrogen atom or a methyl group;
a content ratio of the first monomer unit in polymer A is 5.0 to 60.0 mol % relative to a total number of moles of all monomer units in polymer A,
a matrix-domain structure comprising a matrix comprising the amorphous polyester resin and domains is present in an observation of a cross section of the toner, the domains comprising a domain A comprising at least 80 mass % of the polymer A and a domain B comprising at least 80 mass % of the wax,
the number-average value of the circle-equivalent diameter of domain A is 0.1 to 0.8 μm, and the number-average value of the circle-equivalent diameter of domain B is 0.1 to 1.0 μm, and
Wa+Ww is 3.00 to 20.00 and Wa−Ww is not more than 5.00 when Wa (mass %) is a content of the polymer A in the toner particle and Ww (mass %) is a content of the wax in the toner particle.