Process for producing toner particles
US6106990A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1999 |
| Grant date | Aug 22, 2000 |
| Priority date | — |
| Expiry date | Jul 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0804
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for producing toner particles is conducted by: PA1 preparing toner precursor particles containing at least binder resin and coloring agent; and PA1 spherizing the toner precursor particles to obtain toner particles; PA1 wherein spherizing steps include; PA2 (1) dispersing the toner precursor particles in an aqueous medium containing a dispersant, thereby preparing a disperse system (a); PA2 (2) dispersing oil droplet particles containing a softening agent into an aqueous medium, thereby preparing a disperse system (b); PA2 (3) preparing a mixed disperse system (c) by adding the disperse system (a) to the disperse system (b), and causing the softening agent to be absorbed by the toner precursor particles in the mixed disperse system (c); and PA2 (4) removing the softening agent from the toner precursor particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.