Liquid developer compositions with block copolymers
US5441841A · kind A · utility
21Cited by
8References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 26, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | May 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/1355
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A liquid developer comprised of a liquid, thermoplastic resin particles, optional pigment, a nonpolar liquid soluble charge director comprised of an ionic or zwitterionic quaternary ammonium block copolymer, and wherein said charge director possesses a molecular weight distribution that is bimodal comprising a first AB diblock copolymer component with a number average molecular weight of from about 70,000 to about 200,000, and a second AB diblock copolymer component with a number average molecular weight of from about 2,200 to about 60,000.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.