Toner for developing electrostatic images, and process for producing the same
US5679490A · kind A · utility
19Cited by
7References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1996 |
| Grant date | Oct 21, 1997 |
| Priority date | — |
| Expiry date | May 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08795
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner which comprises toner particles containing a binder resin, a colorant, a polar resin and a release agent, wherein the binder resin is a styrene polymer, a styrene copolymer, or a mixture of these, and has a weight average molecular weight Mw.sub.1 of from 10,000 to 1,000,000, the polar resin is a polyester resin containing a tetrahydrofuran-soluble matter of which weight average molecular weight Mw.sub.2 is from 7,000 to 50,000 and an ethyl alcohol-soluble matter of which weight average molecular weight Mw.sub.3 is from 1,000 to 7,000, where Mw.sub.2 /Mw.sub.3 is from 1.2 to 10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.