Toner and toner manufacturing method
US10295922B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2017 |
| Grant date | May 21, 2019 |
| Priority date | — |
| Expiry date | Mar 13, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0926
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner containing a toner particle including a binder resin, a resin A having a pKa of 6.0-9.0, and a pigment having a pKb of 4.0-7.0, wherein the pKa is an acid dissociation constant measured by preparing a resin solution in which 1.0 part by mass of the resin A, 70.0 parts by mass of toluene and 30.0 parts by mass of ethanol are mixed, and carrying out neutralization titration with a potassium hydroxide ethanol solution of 0.1 mol/L, and the pKb is a basic dissociation constant measured by preparing a pigment dispersion in which 10.0 parts by mass of the pigment, 140.0 parts by mass of toluene and 60.0 parts by mass of ethanol are mixed, and carrying out neutralization titration with a hydrochloric acid ethanol solution of 0.1 mol/L.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.