Emulsion/aggregation process using coalescent aid agents
US7736831B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2006 |
| Grant date | Jun 15, 2010 |
| Priority date | — |
| Expiry date | Apr 15, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for preparing a toner includes mixing a polymeric resin emulsion, a colorant dispersion, and a wax to form a mixture; optionally adding a coagulant to the mixture; heating the mixture at a temperature below a glass transition temperature of the polymeric resin to aggregate the polymeric resin, colorant, and wax, to form aggregated particles; adding a coalescent agent to the aggregated particles; heating the aggregated particles and coalescent agent at a temperature above the glass transition temperature of the polymeric resin, to coalesce the aggregated particles to form toner particles, optionally cooling the mixture, and isolating the tone particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.