Electrostatic latent image developing toner
US9958799B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2017 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Feb 8, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0914
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic latent image developing toner includes a plurality of toner particles each having: a sea-like domain substantially formed from a plurality of resins including at least a polyester resin containing an alcohol component having a carbon number of 2-6; and a plurality of island-like domains distributed in an island-like pattern in the sea-like domain. The island-like domains are substantially formed from a resin containing a nigrosine pigment. A dispersion diameter of the island-like domains is 0.1-1.0 μm. The polyester resin containing the alcohol component having a carbon number of 2-6 is contained in the sea-like domain in an amount of 5-50% by mass relative to a total amount of constituent resins (the plurality of resins). A ratio of an SP value of the resins forming the sea-like domain to an SP value of the resin forming the island-like domain is no greater than 0.98 or at least 1.20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.