US 9,811,016 B2
Toner
Kenji Aoki, Mishima (JP); Tetsuya Kinumatsu, Mishima (JP); Yusuke Kosaki, Susono (JP); Shuntaro Watanabe, Hadano (JP); Noritaka Toyoizumi, Mishima (JP); Takaaki Kaya, Suntou-gun (JP); Atsushi Tani, Suntou-gun (JP); and Takashige Kasuya, Numazu (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Mar. 16, 2016, as Appl. No. 15/71,981.
Claims priority of application No. 2015-062986 (JP), filed on Mar. 25, 2015.
Prior Publication US 2016/0282740 A1, Sep. 29, 2016
Int. Cl. G03G 9/087 (2006.01); G03G 9/093 (2006.01); G03G 9/08 (2006.01)
CPC G03G 9/09371 (2013.01) [G03G 9/0821 (2013.01); G03G 9/08755 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A toner comprising a toner particle having a core-shell structure comprising a core and a shell phase on a surface of the core;
the core comprising a binder resin, comprising a crystalline resin A; and
the shell phase comprises a resin B comprising in one molecule a segment b1 originating from a crystalline resin B1 and a segment b2 originating from a crystalline resin B2, wherein
the toner satisfies formulae (1) and (2) when measured with a differential scanning (DSC)
50. 0≤Tt≤80.0   (1)
0. 00≤ΔHT′t−3/ΔH≤0.20  (2)
where Tt (° C.) represents a peak temperature of an endothermic peak P1 originating from the crystalline resin A during a first temperature ramp up process,ΔH (J/g) represents an endothermic quantity originating from the crystalline resin A from a temperature 20.0° C. lower than T′t to a temperature 10.0° C. higher than T′t when T′t (° C.) is a peak temperature of an endothermic peak P2 originating from the crystalline resin A during a second temperature ramp up process, and ΔHT′t−3(J/g) represents an endothermic quantity originating from the crystalline resin A from a temperature lower 20.0° C. than T′t to a temperature 3.0° C. lower than T′t , and
the binder resin, the crystalline resin B1. and the crystalline resin B2 satisfy formulae (4) and (5),
10.0≤TB2 −TA≤30.0  (4)
−5.0≤TA−TB1≤5.0  (5)
where TA (° C.) represents a peak temperature of an endothermic peak originating from the crystalline resin A during a first temperature ramp up process in measurement of the binder resin with a DSC, TB1(° C.) represents a peak temperature of an endothermic peak during a first temperature ramp up process in measurement of the crystalline resin B1 with a DSC, and TB2 (° C.) represents a peak temperature of an endothermic peak during a first temperature ramp up process in measurement of the crystalline resin B2 with a DSC).