Toner process comprising synthesizing amphiphilic block copolymers via emulsion polymerization
US9958797B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2017 |
| Grant date | May 1, 2018 |
| Priority date | — |
| Expiry date | Feb 28, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09392
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner process comprising (a) providing at least one amphiphilic block copolymer prepared by surfactant-free emulsion polymerization comprising: dissolving a hydrophilic monomer in water; adding a hydrophobic monomer; adding a feed initiator to produce a colloidal dispersion of amphiphilic block copolymer; and optionally, discharging the amphiphilic block copolymer; (b) contacting one or more of a latex polymer, a wax; and a colorant with the colloidal dispersion of amphiphilic block copolymer to form a blend; or contacting the discharged amphiphilic block copolymer with one or more of a latex polymer, a wax dispersion, and a colorant dispersion, and forming a further dispersion; (c) heating the blend or further dispersion at a temperature below the glass transition temperature of the latex polymer to form aggregated toner particles; (d) adding a coalescing agent to the toner particles thereby coalescing the toner particles; and (e) recovering the toner particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.