Toner for developing electrostatic images, and process for its production
US5571653A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1994 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Oct 19, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/08737
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A toner for developing an electrostatic image comprises toner particles containing a binder resin, a colorant and a wax. The toner contains polymerizable vinyl monomer or a mixture of organic solvent and polymerizable vinyl monomer in an amount of not more than 1,000 ppm. The toner particles are those obtained by mixing a mixture containing, at least, one or plural kinds of polymerizable vinyl monomer, a styrene-diene copolymer comprised of styrene or a styrene derivative and butadiene or isoprene in a copolymerization weight ratio of from 95:5 to 65:35, the colorant, the wax and a polymerization initiator to prepare a polymerizable monomer composition; dispersing the polymerizable monomer composition in an aqueous medium to carry out granulation; and polymerizing the polymerizable vinyl monomer in the aqueous medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.