Toner and production process thereof
US7018766B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2003 |
| Grant date | Mar 28, 2006 |
| Priority date | — |
| Expiry date | May 17, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/097
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention provides a toner comprising a binder resin, a colorant, and a charge control agent comprising a charge control substance supported by an inorganic porous material, and having been subjected to thermal fairing treatment. Also disclosed are a toner obtained by a process comprising the steps of: kneading a composition containing a binder resin, a colorant and a charge control agent comprising an ionic or neutral substance supported by an inorganic porous material; pulverizing the kneaded product; adding the pulverized product to a solvent immiscible with water; dispersing the mixture in an aqueous medium; and removing the solvent by at least one of heating and pressure reduction, and a toner comprising associated particles formed from: primary particles obtained from an emulsion of a binder resin; a colorant; and a charge control agent comprising a water soluble charge control substance incorporated in inorganic fine particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.