Polymer suspension method for producing toner particles
US5620826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1995 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Dec 12, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09392
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method is provided for producing dry toner particles comprising the steps of: PA1 (i) dissolving at least one organic polymer (toner resin) in a solvent therefor to form a solution, said solvent being immiscible with water, PA1 (ii) dispersing said solution in an aqueous phase to form a dispersion of small droplets, PA1 (iii) removing the solvent by evaporation from the dispersed droplets and PA1 (iv) separating solid polymeric particles from the water of the aqueous phase, characterized in that: PA2 I. the dispersion of said small droplets is stabilized by the presence in the aqueous phase of a dissolved water-soluble (co)polymer, comprising both hydrophobic and hydrophilic moieties and that PA2 II. after evaporation of said solvent said water-soluble (co)polymer is washed away.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.