Metal salts of beta-diketones as charging adjuvants for electrostatic liquid developers
US5028508A · kind A · utility
20Cited by
2References
58Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1989 |
| Grant date | Jul 2, 1991 |
| Priority date | — |
| Expiry date | Dec 20, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/12
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An electrostatic developer consisting essentially of (A) a nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount; (B) thermoplastic resin particles, less than 30 .mu.m average particle size, a nonpolar liquid soluble ionic or zwitterionic charge director compound (C), and (D) a metal salt of a .beta.-diketone as described. The process of preparation of the liquid electrostatic developer is also described. The liquid developers of the invention are useful in copying, color proofing, including digital color proofing, lithographic printing plates and resists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.