Developer compositions
US5679492A · kind A · utility
8Cited by
7References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1996 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | Aug 8, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/135
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A negatively charged liquid developer comprised of a nonpolar liquid, a mixture of a first and a second thermoplastic resin with dissimilar melt indexes, a pigment, charge director, optional charge adjuvent, a charge control agent comprised of a component of the alternative formulas ##STR1## wherein R.sub.1 is selected from the group consisting of hydrogen and alkyl, and n is 0 (zero), 1, 2, 3, or 4, and wherein the melt index of the first resin is from about 50 to about 800 grams, and the melt index of the second resin from about 850 to about 2,500 grams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.