Toner for electrophotography and developer for electrophotography using the same, process cartridge, apparatus for forming image, and method for forming image
US7252914B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2002 |
| Grant date | Aug 7, 2007 |
| Priority date | — |
| Expiry date | Oct 27, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09733
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for electrophotography fulfilling both the fixability and the void resistance at high level, and forms a high-quality image. The toner for electrophotography contains: a binder resin; and a wax component which contains: a first wax having an endothermic peak in a temperature region of 60 to 90° C., the endothermic peak occurring in the temperature-rising stage of a DSC curve determined by a differential scanning calorimeter, and having a molecular weight distribution (weight-average molecular weight (Mw)/number-average molecular weight (Mn)) of 1.5 or less, and substantially not containing a component having 500 Mw or less; and at least any of a second wax having an endothermic peak in a temperature region of 100 to 150° C. and the molecular weight distribution of 5 to 20; and a third wax having an endothermic peak in a temperature region of 150 to 170° C. and the molecular weight distribution of 1.1 or more.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.