Electrostatic-image developing toner, electrostatic image developer, and toner cartridge
US10353310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 2017 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | Oct 4, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/0865
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic-image developing toner contains toner particles, each including a core particle and a shell layer disposed on at least a portion of a surface of the core particle. The core particle contains a first amorphous polyester resin containing structural units derived from a polycarboxylic acid and structural units derived from a polyol. About 5% by mass or less of the structural units derived from the polyol are structural units derived from a polyol containing a bisphenol-A backbone. The shell layer contains a second amorphous polyester resin containing structural units derived from a polycarboxylic acid and structural units derived from a polyol. About 50% by mass or more of the structural units derived from the polyol are structural units derived from a polyol containing a bisphenol-A backbone. The electrostatic-image developing toner has a water content of about 2.0% to about 5.0% by mass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.