Emulsion aggregation toners with improved particle size distribution
US9075329B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | May 17, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09392
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of making toner particles that includes forming a pre-shell aggregate mixture by adding to a reactor pre-shell aggregate ingredients, the includes a latex resin, the reactor having a mixing impeller and a heating jacket; performing pre-shell aggregation while homogenizing the pre-shell aggregate mixture with the impeller at an initial tip speed to form pre-shell aggregates; decreasing the tip speed to a second tip speed when the pre-shell aggregates reach a target intermediate average particle diameter; and then decreasing the tip speed at one or more intervals between when the pre-shell aggregates reach the target intermediate average particle diameter and when the pre-shell aggregates reach a target final average particle diameter so that the tip speed meets the following formula:tip speed=1644ft/min−204.9(ft/(min*μm))*average particle diameter(μm).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.