Toner and charge control agent using pyrazolone derivative or salt of derivative
US10474050B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2016 |
| Grant date | Nov 12, 2019 |
| Priority date | — |
| Expiry date | Sep 8, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08755
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The purpose of the present invention is to provide a charge control agent for polymerized toners and particularly for color toners, which has a large charge amount and environmentally stable charging characteristics.Since a charge control agent including a pyrazolone derivative represented by a general formula (1) or a salt of the derivative as an active ingredient has a large charge amount and excellent environmental stability of charging, it has an excellent charge-imparting effect for use in polymerized toners and particularly in color toners: in the formula, R1, R2, and R3 each independently represent a substituted or unsubstituted C1 to C20 linear or branched alkyl group, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.