US 11,698,594 B2
Toner
Toru Takahashi, Ibaraki (JP); Nobuyoshi Sugahara, Tokyo (JP); Hitoshi Sano, Chiba (JP); Kazunari Ooyama, Ibaraki (JP); Yuu Nishimura, Chiba (JP); Kohji Takenaka, Ibaraki (JP); and Koh Ishigami, Chiba (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Apr. 6, 2021, as Appl. No. 17/223,070.
Application 17/223,070 is a continuation of application No. PCT/JP2020/038024, filed on Oct. 7, 2020.
Claims priority of application No. 2019-184657 (JP), filed on Oct. 7, 2019.
Prior Publication US 2021/0223710 A1, Jul. 22, 2021
Int. Cl. G03G 9/087 (2006.01)
CPC G03G 9/08755 (2013.01) [G03G 9/08773 (2013.01)] 6 Claims
 
1. A toner, comprising:
a toner particle comprising a binder resin and a crystalline polyester, the binder resin comprising a polyester having a structure represented by formula (1)

OG Complex Work Unit Chemistry
where Rs independently represent hydrogen, a methyl group or a phenyl group;
A represents a polyester segment;
B represents a polyester segment or is selected from the group consisting of —R1OH, —R1COOH,

OG Complex Work Unit Chemistry
 and —R1NH2 wherein R1 represents a single bond or a C1-4 alkylene group; and
average repeat number n is 10 to 80, wherein
ΔH1 is 1.0 to 10.0 J/g and (ΔH2/ΔH1) is 0.50 to 1.00 when ΔH1 is the endothermic quantity originating with the crystalline polyester in a first heating-up step measured on the toner by differential scanning calorimetry, and ΔH2 is the endothermic quantity originating with the crystalline polyester in a second heating-up step measured on the toner by differential scanning calorimetry.