Liquid developer
US9316939B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 2014 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Sep 9, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/125
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid developer is obtained by dispersing toner particles containing a core resin, a shell resin different from the core resin, and a coloring agent in an insulating liquid. The core resin contains a crystalline urethane-modified polyester resin. A solid content of the liquid developer corresponding to a portion of the liquid developer excluding the insulating liquid has a storage elastic modulus at 80° C., not lower than 1×104 Pa and not higher than 5×106 Pa. A lowest temperature at the time when an absolute value of an amount of change in a logarithmic value (log(G′)) of a storage elastic modulus (G′) of the solid content of the liquid developer with respect to a temperature T (° C.) (|Δ log(G′)/ΔT|) satisfies an Equation (1) below is not lower than 45° C.:|Δ log(G′)/ΔT|>0.1 Equation (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.