US 12,386,279 B2
Toner
Takeshi Hashimoto, Ibaraki (JP); Hayato Ida, Ibaraki (JP); and Kazuki Murata, Tokyo (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jan. 14, 2022, as Appl. No. 17/576,014.
Claims priority of application No. 2021-006915 (JP), filed on Jan. 20, 2021; and application No. 2021-202485 (JP), filed on Dec. 14, 2021.
Prior Publication US 2022/0236653 A1, Jul. 28, 2022
Int. Cl. G03G 9/087 (2006.01); G03G 9/08 (2006.01); G03G 9/097 (2006.01)
CPC G03G 9/08728 (2013.01) [G03G 9/081 (2013.01); G03G 9/0825 (2013.01); G03G 9/08706 (2013.01); G03G 9/09725 (2013.01)] 7 Claims
 
1. A toner comprising:
a toner particle containing a binder resin including a first resin and a second resin,
wherein the first resin is a crystalline vinyl resin,
wherein the second resin is an amorphous resin which is vinyl-based resin,
wherein, in cross-sectional observation of the toner particle, the toner particle has a domain-matrix structure formed of:
a matrix containing the first resin in an amount of 80% by mass or more; and
domains each containing the second resin in an amount of 80% by mass or more;
wherein, in differential scanning calorimetry (DSC) of the toner, an endothermic quantity ΔH (J/g) derived from the first resin satisfies a relationship of ΔH≥3, and
wherein, in flow tester measurement using the toner as a sample, T1 and T10 satisfy the following relationships:
T10≥65;
T1−T10≤10
where the T1 (° C.) represents a temperature at which a melt viscosity V1 at an applied pressure of 0.9807 MPa becomes 1×105 Pa·s, and the T10 (° C.) represents a temperature at which a melt viscosity V10 at an applied pressure of 9.807 MPa becomes 1×105 Pa's, and
the first resin has a first monomer unit, a second monomer unit and a third monomer unit,
the first monomer unit is represented by formula (1);

OG Complex Work Unit Chemistry
in formula (1), RZ1 represents a hydrogen atom or a methyl group, and R represents an alkyl group having 18 to 36 carbon atoms,
the second monomer unit is represented by formula (3);

OG Complex Work Unit Chemistry
in the formula (3), X represents a single bond, R1 represents —C≡N or —COOR11, where R11 represents a hydrogen atom, and R2 represents a hydrogen atom or a methyl group, and
the third monomer unit is a styrene monomer unit, a methyl methacrylate monomer unit or a methyl acrylate monomer unit.