US 11,914,325 B2
Toner and method for producing toner
Takeshi Hashimoto, Ibaraki (JP); Kentaro Kamae, Kanagawa (JP); Takeshi Ohtsu, Ibaraki (JP); and Hayato Ida, Ibaraki (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 1, 2021, as Appl. No. 17/188,041.
Claims priority of application No. 2020-037683 (JP), filed on Mar. 5, 2020.
Prior Publication US 2021/0278774 A1, Sep. 9, 2021
Int. Cl. G03G 9/087 (2006.01); G03G 9/08 (2006.01)
CPC G03G 9/08755 (2013.01) [G03G 9/0804 (2013.01); G03G 9/08782 (2013.01)] 14 Claims
 
1. A toner, comprising:
a toner particle comprising a binder resin and a wax, the binder resin comprising an amorphous polyester resin and a polymer A;
a content of the amorphous polyester resin in the binder resin being at least 50.00 mass %, and a content of polymer A in the binder resin being 0.10 to 10.00 mass %;
polymer A comprising a first monomer unit comprising a structure represented by formula (1) and a second monomer unit that is different from the first monomer unit

OG Complex Work Unit Chemistry
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)

OG Complex Work Unit Chemistry
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 being 5.0 to 60.0 mol % relative to a total number of moles of all monomer units in polymer A, wherein
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 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.