US 8,802,340 B2 · Electrophotographic toner, developer for electrophotography using the toner, process cartridge, and image forming apparatus using the same

Abstract

The invention provides an electrophotographic toner having at least: a binder resin, a coloring agent, and an alkali metal salt of polyethylene oxide. The invention further provides an electrophotographic developer having the electrophotographic toner, a process cartridge having a developer bearing body which accommodates the electrophotographic developer, and an image forming apparatus having a toner image forming member that forms a toner image on a recording medium by using the electrophotographic developer and a fixing member that fixes the toner image by heating and pressurizing or by photoirradiation. The processing speed in image formation using the image forming apparatus can be about 1,000 mm/sec or more.

Claims13

Dependent claims

An electrophotographic toner comprising:

a binder resin, a coloring agent, an alkali metal salt of oxidized polyethylene, and a polyethylene having a weight-average molecular weight in a range of about 12,000 to about 100,000, wherein the alkali metal salt of oxidized polyethylene includes a carboxyl group that forms a salt with an alkali metal ion.

Dependencies are inferred from the claim text.

Facts

Application

12/170,304Filed 9 Jul 2008

Priority

JP 2007-33296025 Dec 2007

Published

US 2009/0162771 A125 Jun 2009

Granted

12 Aug 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

G03G 9/08753
Comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: epoxyresins
G03G 9/0819
With toner particles: characterised by the dimensions of the particles
G03G 9/08704
Comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds: polyalkenes
G03G 9/08755
Comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: polyesters

Electrophotographic toner, developer for electrophotography using the toner, process cartridge, and image forming apparatus using the same

Life of this patent

Electrophotographic toner, developer for electrophotography using the toner, process cartridge, and image forming apparatus using the same

Life of this patent

Abstract

Claims13