Salts of acid-containing AB diblock copolymers as charge directors for positive-working electrostatic liquid developers
US5130221A · kind A · utility
9Cited by
2References
49Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1990 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Mar 7, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/133
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Positive-working electrostatic liquid developer consisting essentially of PA1 (A) nonpolar liquid having Kauri-butanol value less than 30, present in major amount, PA1 (B) thermoplastic resin particles having an average particle size by area of less than 10 .mu.m, and PA1 (C) an AB diblock copolymer charge director compound as defined. Optionally a colorant and charge adjuvant are present. The process of making the electrostatic liquid developer is described. 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.