Monofunctional amines as adjuvant for liquid electrostatic developers
US4935328A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Apr 7, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S524/901
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Electrostatic liquid developer having improved negative charging characteristics consisting essentially of PA1 (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, PA1 (B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m, PA1 (C) charge director compound, and PA1 (D) at least one soluble solid or liquid organic monofunctional amine compound of the formula: R.sub.n NH.sub.3-n wherein R is alkyl, cycloalkyl or alkylene, or substituted alkyl, the alkyl, cycloalkyl, alkylene or substituted alkyl group being of 1 to 50 carbon atoms, and n is an integer of 1 to 3. Optionally, a colorant, e.g., a pigment; metallic soap, adjuvant can be present. The electrostatic liquid developer is useful in copying, making proofs including digital color proofs, lithographic printing plates, and resists.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.