Toner
OwnerYuhei Terui, Kenji Aoki +3inventors
InventorsYUHEI TERUI, KENJI AOKI, SHINTARO NOJI, YU YOSHIDA, MARIKO YAMASHITA
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Abstract
A toner comprising a toner particle, the toner particle comprising a resin, wherein, where a chloroform-soluble component of the resin is analyzed by gradient LC analysis using acetonitrile as a poor solvent and chloroform as a good solvent for the chloroform-soluble component of the resin, a peak detected in a range of a ratio of chloroform in the mobile phase of 50.0 to 75.0% by volume and a peak detected in a range of a ratio of chloroform in the mobile phase of 75.0 to 95.0% by volume satisfy a specific relationship.
Claims13
A toner comprising a toner particle, the toner particle comprising a resin, wherein
- where
- a chloroform-soluble component of the resin extracted from the toner particle is a soluble portion obtained by extraction from the toner particle for 48 h in Soxhlet extraction using a chloroform solvent from which a component having a molecular weight of 2000 or less is removed by recycling HPLC, and
- the chloroform-soluble component of the resin is analyzed by gradient LC analysis using acetonitrile as a poor solvent and chloroform as a good solvent for the chloroform-soluble component of the resin, and changing linearly from a mobile composition of 100% by volume of acetonitrile to a mobile phase of 100% by volume of chloroform,
- when an area of a peak detected using a Corona charged particle detector in a range of a ratio of chloroform in the mobile phase of 50.0 to 75.0% by volume is defined as SA and a maximum value of the peak is defined as PA, an area of a peak detected using a Corona charged particle detector in a range of a ratio of chloroform in the mobile phase of 75.0 to 95.0% by volume is defined as SB and a maximum value of the peak is defined as PB, and a smallest minimum value exists between the PA and the PB is defined as VAB,
- the PA and the PB exist, and
- the SA, the SB, the PB, and the VAB satisfy formulas (1) and (2):
- 0.30≤SA/SB≤0.85 (1)
- 0.25≤VAB/PB≤0.55 (2).
Dependencies are inferred from the claim text.