Toner
US10768543B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 26, 2019 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Aug 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09708
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner having a toner particle, which contains a binder resin, and inorganic fine particles, the toner being characterized in that the binder resin contains a polyester resin, the polyester resin has, at a terminal, an alkyl group having an average number of carbon atoms of from 4 to 102, the number average particle diameter of primary particles of the inorganic fine particles is from 10 to 90 nm, the dielectric constant of the inorganic fine particles is from 55.0 to 100.0 pF/m, as measured at 25° C. and 1 MHz, and the inorganic fine particles are surface-treated with an alkylalkoxysilane represented by formula (1) below: CnH2n+1—SiOCmH2m+1)3 (1) in formula (1), n denotes an integer of from 4 to 20, and m denotes an integer of from 1 to 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.