Color toner for developing electrostatic image, comprising first linear polyester and second non-linear polyester as binder resin
US6506530B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2000 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | May 31, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08797
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provide a toner comprising:a coloring agent;a binder resin comprising a first binder resin and a second binder resin, the first binder resin being composed of a linear polyester resin having a number-average molecular weight (Mn) of from 2,800 to 7,000, a weight-average molecular weight (Mw) of from 8,900 to 21,000, and a Mw/Mn ratio of 2 to 4, the second binder resin being composed of a non-linear polyester resin having a number-average molecular weight (Mn) of from 3,500 to 8,000, a weight-average molecular weight (Mw) of from 40,000 to 120,000, and a Mw/Mn ratio of 10 to 20, and a ratio of the first binder resin to the second binder resin (the first binder resin:the second binder resin) being 60:40 to 95:5 by weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.