US 7,407,732 B2 · Electrophotographic toner

Abstract

An object of the invention is to provide a black toner that can satisfy further the requirement for low energy, high-speed and high performance, a color toner that can be used in an image forming apparatus provided with an oil-less fixation device, and a color toner including the black toner and the color toner. For the black toner, a polyester resin having an acid value of 7 to 20 mgKOH/g is used as the binding resin, and a carboxylic acid-modified paraffin wax having an acid value of 4 to 30 mgKOH/g is used as the wax. For the color toner, polyester resin having an acid value of 7 to 20 mgKOH/g is used as the binding resin, and a carboxylic acid-modified paraffin wax having an acid value of 6 to 25 mgKOH/g is used as the wax.

Claims7

Dependent claims

An electrophotographic black toner comprising:

a binding resin made of a polyester resin having an acid value of 20 mgKOH/g;
a wax made of a carboxylic acid-modified paraffin wax having an acid value of 30 mgKOH/g, wherein the DSC peak temperature of the wax is 92° C.;
and
a coloring agent.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

10/465,569Filed 20 Jun 2003

Priority

JP P2002-18202821 Jun 2002

Published

US 2003/0235772 A125 Dec 2003

Granted

5 Aug 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

G03G 9/08755
Comprising macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: polyesters
G03G 9/08782
Natural macromolecular compounds or derivatives thereof: waxes
G03G
Electrography

Electrophotographic toner

Life of this patent

Electrophotographic toner

Life of this patent

Abstract

Claims7