Crash cooling method to prepare toner
US10613450B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2019 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Apr 3, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G15/104
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present disclosure relates generally to a method to make a chemically prepared toner that employs a crash cooling process. In particular, the crash cooling process involves the addition of a toner slurry having a temperature between 70° C. and 90° C. to an equivalent amount of cold water having a temperature between 5° C. and 20° C. Polyester and styrene acrylic toners as well as polyester core shell toners having a borax coupling agent between the toner core and toner shell made from this cooling process results in an improvement to the amount of toner waste, thereby achieving a higher toner usage efficiency for an electrophotographic printing system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.