Process for preparation of liquid electrostatic developers
US4783389A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Mar 27, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Process for the preparation of toner particles for liquid electrostatic imaging comprising PA1 (A) mixing a thermoplastic resin and a nonpolar liquid at a temperature sufficient to plasticize and liquify the resin and below that at which the nonpolar liquid boils and the resin decomposes, PA1 (B) cooling the mixture to form resin particles in the nonpolar liquid, PA1 (C) reducing the size of the resin particles to below about 30 .mu.m by passing the product of step (B) through at least one liquid jet interaction chamber at a liquid pressure of at least 1000 p.s.i., e.g., a Microfluidizer.RTM.. The process produces liquid electrostatic developer quicker than other known processes, the developer being useful in copying, making proofs, including digital proofs, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.