Toner
AssigneeCanon Kabushiki Kaisha
InventorsKENJI AOKI, SHUHEI IWASAKI, YUKI MASUDA, KOKI INOUE
Life of this patent
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Abstract
A toner includes toner particles containing a resin component. The toner particles contain, as the resin component, a crystalline vinyl resin having a unit (a) represented by formula (1). The resin component contains the unit (a) in an amount of 15.0 mass % or more and 40.0 mass % or less based on the mass of the resin component. The content of the unit (a) in a component separated by gradient LC analysis of an acetonitrile/chloroform eluted component of chloroform soluble matter W of the toner particles and the storage elastic modulus at 100° C. have specific relationships.
Claims10
A toner comprising:
- toner particles containing a resin component,
- wherein the resin component contains a crystalline vinyl resin having a unit (a) represented by formula (1),
- the resin component contains the unit (a) in an amount of 15.0 mass % or more and 40.0 mass % or less based on a mass of the resin component,
- in formula (1), R1 represents a hydrogen atom or a methyl group, and n represents an integer of 15 to 35,
- when the toner particles are subjected to Soxhlet extraction using chloroform for 18 hours to obtain chloroform soluble matter, from which a component having a molecular weight of 2,000 or less is removed by recycling HPLC to obtain chloroform soluble matter W,
- for the chloroform soluble matter W, acetonitrile as a poor solvent and chloroform as a good solvent are used while a mobile phase is linearly changed from 100 vol % acetonitrile to 100 vol % chloroform, and an eluted component is subjected to gradient LC analysis,
- a plurality of local maximal values are present in a graph in which a horizontal axis represents a chloroform percentage (vol %) in the mobile phase, and a vertical axis represents a signal intensity (μA) of the eluted component detected using a charged particle detector,
- when, of a local maximal value with a highest intensity and a local maximal value with a second highest intensity among the plurality of local maximal values, a local maximal value at which the chloroform percentage in the mobile phase is smaller is a local maximal value PA, and a local maximal value at which the chloroform percentage in the mobile phase is larger is a local maximal value PB, a local minimum value with a lowest intensity present between the local maximal value PA and the local maximal value PB is a local minimum value BAB, a chloroform percentage at the local minimum value BAB is VAB vol % (20.0<VAB<95.0), a component whose chloroform percentage in the mobile phase is 20.0 vol % or more and less than VAB vol % is a component A, and a component whose chloroform percentage in the mobile phase is VAB vol % or more and 95.0 vol % or less is a component B,
- the resin component contains the component B in an amount of 40.0 mass % or more and 80.0 mass % or less based on the mass of the resin component,
- when a content of the unit (a) in the chloroform soluble matter W is WC mass %, and a content of the unit (a) in the component B is WB mass %,
- WC and WB satisfy formula (2),
- WB/WC≥0.70 (2), and
- when a storage elastic modulus of the toner particles at 100° C. is G′(T), and a storage elastic modulus of the component B at 100° C. is G′(B),
- G′(T) and G′(B) satisfy formulas (3) and (4),
- 5.
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Dependencies are inferred from the claim text.