Toner for developing electrostatic image
US6623901B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1997 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Feb 22, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/09733
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing an electrostatic image is constituted by a binder resin and a long-chain compound. The binder resin is a polyester resin or vinyl resin respectively having an acid value of preferably 25-70 mgKOH/g. The long-chain compound is a long-chain alkyl alcohol having an OH value of 10-120 mgKOH/g or a long-chain alkyl carboxylic acid having an acid value of 5-120 mgKOH/g and is contained so as to satisfy a condition of the following formula (1) or formula (2):Formula (1)acid value of binder resin +OH value of long-chain alkyl alcohol >(¼)×OH value of binder resin, orFormula (2)acid value of binder resin +acid value of long-chain alkyl carboxylic acid >(¼)×OH value of binder resin. The toner is characterized by a good balance between fixing performances and developing performances suitable for a variety of models of image forming apparatus and in wide ranges of environmental conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.