Wax emulsion for emulsion aggregation toner
US7560505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2008 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Mar 24, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08704
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A wax emulsion comprised of polyethylene wax and one or more surfactants in an aqueous medium, wherein the polyethylene wax has a degree of crystallinity of from about 50% to about 80% by weight of the polyethylene wax, is provided. The wax emulsion is made by emulsifying the polyethylene wax, one or more surfactants and an aqueous medium in a vessel at a temperature at or above the melting point of the polyethylene wax to form an emulsified product, and subsequently cooling the emulsified product to ambient temperature at a cooling rate of at least 10° C. per minute. The wax emulsion is preferably incorporated into toner particles prepared by emulsion/aggregation/coalescing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.