Toner for developing electrostatic images
US10539894B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 2015 |
| Grant date | Jan 21, 2020 |
| Priority date | — |
| Expiry date | Aug 5, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09791
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention is to provide a toner for developing electrostatic images, which has an excellent balance between low-temperature fixability and heat-resistant shelf stability, which has good toner conveyance amount stability and printing durability, and which has less occurrence of fog in a high temperature and high humidity environment. Disclosed is a toner for developing electrostatic images, comprising colored resin particles containing a binder resin and a colorant, and an external additive, wherein the toner comprises, as the external additive, fine silica particles in an amount of 0.5 to 3.0 parts by mass with respect to 100 parts by mass of the colored resin particles, the fine silica particles having a hydrophobicity of 15 to 49% that is determined after a high-temperature and high-humidity incubation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.