Electrophotographic toner and image forming apparatus
US7435519B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2005 |
| Grant date | Oct 14, 2008 |
| Priority date | — |
| Expiry date | Jan 11, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrophotographic toner comprising at least a fixing resin, a coloring agent, a release agent and a charge control agent, wherein the release agent is carnauba wax, the charge control agent is a boron complex of a salicylic acid derivative, and the fixing resin contains two kinds of polyester resins in ratio represented by the following equation (1);wherein in the above equation, A(T1/2)−A(Tfb)<B(T1/2)−B(Tfb), A(T1/2) represents a softening point (° C.) of the polyester A, A(Tfb) a flow-out start point (° C.) of the polyester A, B(T1/2) a softening point (° C.) of the polyester B, B(Tfb) a flow-out start point (° C.) of the polyester B, C a weight rate of the polyester A in the fixing resin, and D a weight rate of the polyester B in the fixing resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.