Toner for developing electrostatic charge image, electrostatic charge image developer, toner cartridge, process cartridge, and image forming apparatus
US12298711B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2022 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Jan 9, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing an electrostatic charge image incorporates toner particles that contain binder resins including an amorphous polyester resin and a crystalline polyester resin, an ester-based release agent, and a polycondensate of a styrene-acrylic resin and a polyolefin resin. The polycondensate of styrene-acrylic and polyolefin resins has a storage modulus G′SP (70) at 70° C. of 1×104 Pa or more and 1×107 Pa or less and a storage modulus G′SP (90) at 90° C. of 1×103 Pa or more and 1×106 Pa or less in dynamic rheometry. The toner particles have a storage modulus G′T (70) at 70° C. of 1×104 Pa or more and 1×106 Pa or less and a storage modulus G′T (90) at 90° C. of 1×103 Pa or more and 1×105 Pa or less in dynamic rheometry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.