Toner
AssigneeCanon Kabushiki Kaisha
InventorsMichihisa Magome, Tomohisa Sano, Kozue Uratani
Life of this patent
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Abstract
A toner has toner particles including a binder resin, a colorant, an ester wax and a hydrocarbon wax; and inorganic fine particles. The ester wax includes an ester compound having a structure represented by formula (1): R1—CO—O—(CH2)x—O—OC—R2; or formula (2): R3—O—OC—(CH2)x—CO—O—R4. The ester wax includes an ester compound having a highest abundance rate in an amount of 40% to 80% by mass with respect to a total amount of the ester wax in a composition distribution. The ester wax has, in differential scanning calorimetry, a peak top temperature of an endothermic peak of 65° C. to 80° C. In differential scanning calorimetry, the toner has only one endothermic peak derived from the waxes. A relationship: 3.0≦(Tw−Tt)≦8.0 is satisfied.
Claims6
A toner comprising:
- toner particles, each of which comprises a binder resin, a colorant, an ester wax and a hydrocarbon wax;
- and
- inorganic fine particles,
- wherein:
- the ester wax comprises an ester compound having a structure represented by the following formula (1) or (2):
- R1—CO—O—(CH2)x—O—OC—R2;
- Formula (1):
- or
- R3—O—OC—(CH2)x—CO—O—R4 Formula (2):
- wherein R1 to R4 are an alkyl group;
- and x is an integer of 8 to 10;
- the ester wax comprises, in a composition distribution, an ester compound having a highest abundance rate in an amount of 40% by mass or higher and 80% by mass or lower with respect to a total amount of the ester wax;
- when measuring the ester wax and the hydrocarbon wax solely with differential scanning calorimetry, each of the waxes has an endothermic peak respectively, the endothermic peak of the ester wax having a peak top temperature of 65° C. to 80° C., and
- when measuring the toner with differential scanning calorimetry, the toner has only one endothermic peak derived from the waxes, the only one endothermic peak having a peak top temperature Tt (° C.),
- wherein:
- when measuring the ester wax and the hydrocarbon wax solely with differential scanning calorimetry, among a peak top temperature of the endothermic peak of the ester wax and a peak top temperature of the endothermic peak of the hydrocarbon wax, the lower temperature is defined as Tw (° C.),
- Tt (° C.) and Tw (° C.) satisfy the following relationship:
- 3.0≦(Tw−Tt)≦8.0.
Dependencies are inferred from the claim text.