Quaternaryammonium hydroxide as adjuvant for liquid electrostatic developers
US4783388A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1987 |
| Grant date | Nov 8, 1988 |
| Priority date | — |
| Expiry date | Jun 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1355
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Negative-working electrostatic liquid developer having improved charging characteristics consisting essentially of PA0 (A) nonpolar liquid having a Kauri-butanol value of less than 30, present in a major amount, PA0 (B) thermoplastic resin particles having an average by area particle size of less than 10 .mu.m, PA0 (C) nonpolar liquid soluble ionic or zwitterionic compound, and PA0 (D) a quaternaryammonium hydroxide compound as defined, e.g., tetraethylammonium hydroxide, tetrabutylammonium hydroxide, etc., soluble in an amount of at least 0.5 part per million by weight in the nonpolar liquid. 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.