US 11,835,873 B2
Toner and two component developer
Takeshi Hashimoto, Ibaraki (JP); Kentaro Kamae, Kanagawa (JP); Ichiro Kanno, Chiba (JP); and Hayato Ida, Ibaraki (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Dec. 9, 2020, as Appl. No. 17/116,402.
Claims priority of application No. 2019-225482 (JP), filed on Dec. 13, 2019.
Prior Publication US 2021/0181647 A1, Jun. 17, 2021
Int. Cl. G03G 9/087 (2006.01); C08G 63/183 (2006.01); C08F 220/06 (2006.01); C08F 220/18 (2006.01); C08F 212/10 (2006.01); C08F 220/46 (2006.01); G03G 9/08 (2006.01)
CPC G03G 9/08711 (2013.01) [C08F 212/10 (2013.01); C08F 220/06 (2013.01); C08F 220/1818 (2020.02); C08F 220/46 (2013.01); C08G 63/183 (2013.01); G03G 9/0819 (2013.01); G03G 9/08755 (2013.01)] 14 Claims
 
1. A toner, comprising:
a toner particle containing a binder resin including a crystalline first resin and an amorphous second resin;
the crystalline first resin comprising a first monomer unit represented by formula (1), a second monomer unit, and a third monomer unit represented by formula (5)

OG Complex Work Unit Chemistry

OG Complex Work Unit Chemistry
when RZ1 denotes a hydrogen atom or a methyl group,
R denotes an alkyl group having 18 to 36 carbon atoms,
R5 denotes a hydrogen atom or a methyl group,
Ph denotes a phenyl group, and
the second monomer unit is a 2-hydroxypropyl methacrylate unit, wherein
a content ratio of the first monomer unit in the crystalline first resin is at least 30.0 mass %,
a content ratio of the third monomer unit in the crystalline first resin is 10.0 to 50.0 mass %,
21.00≤SP21 when SP21 is an SP value (J/cm3)0.5 of the second monomer unit,
the amorphous second resin contains at least one member selected from the group consisting of a vinyl-based resin and a hybrid resin in which a vinyl-based resin and a polyester resin are bound to each other,
an observed cross section of the toner particle has a domain-matrix structure formed of a matrix that includes the crystalline first resin and domains that include the amorphous second resin,
a number average diameter of the domains is 0.10 to 2.00 μm,
19.0≤SP1 and 0.3≤SP2−SP1≤1.3 when SP1 (J/cm3)0.5 is an SP value of the crystalline first resin and SP2 (J/cm3)0.5 is an SP value of the amorphous second resin, and
0.5≤OHVa≤30.0 and 0.5≤OHVi≤30.0 when OHVa (mg KOH/g) is a hydroxyl value of the crystalline first resin and OHVi (mg KOH/g) is a hydroxyl value of the amorphous second resin.