Toner compositions and processes
US5763133A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1997 |
| Grant date | Jun 9, 1998 |
| Priority date | — |
| Expiry date | Mar 28, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08733
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for the preparation of toner comprising PA1 (i) blending (a) an aqueous pigment dispersion containing a first ionic surfactant and an optional charge control agent with (b) a latex blend comprised of linear polymer and crosslinked polymer particles, optional nonionic surfactant and a second ionic surfactant with a charge polarity opposite to that of said first ionic surfactant in said pigment dispersion; PA1 (ii) heating the resulting mixture at about below the glass transition temperature (Tg) of the linear latex polymer to form toner sized aggregates; and PA1 (iii) subsequently heating said aggregate suspension about above the Tg of the linear latex polymer to effect fusion or coalescence of said aggregates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.