Organometallic compounds as mottle prevention additives in liquid electrostatic developers
US4994341A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Dec 20, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/105
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Electrostatic liquid developer consisting essentially of PA0 (A) nonpolar liquid, Kauri-butanol value less than 30, PA0 (B) particles of thermoplastic resin having free carboxyl groups (<30.mu.m ave particle size), PA0 (C) nonpolar liquid soluble oil-soluble petroleum sulfonate or anionic glyceride charge director, and PA0 (D) at least one organometallic compound as defined present in 0.01 to 0.15 part by weight metal based on the total weight of liquid developer. The process of preparation of the liquid developer is also disclosed. The developers demonstrate reduced mottle in a fused image. The developers are used in copying, color proofing, preparation of lithographic printing plates and resists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.