US 2006/0051695 A1 · Carrier for electrophotography

Abstract

The present invention is a carrier for electrophotography in which a surface of at least a core material is coated with a resin, in which the coating resin contains a fluorine modified silicone resin and an aminosilane coupling agent, and in which the carrier charges a toner negatively. Consequently, a carrier with a high durability and a long lifetime for electrophotography is provided, in which the charge amount does not decrease at high temperature or high humidity nor extremely increase at low temperature or low humidity, in which a deterioration of a developing agent caused by stripping of a coating layer is prevented, and in which a deterioration caused by formation of spent toner of a toner is not caused.

Claims11

Dependent claims

A carrier for electrophotography in which a surface of at least a core material is coated with a resin,

wherein the coating resin contains a fluorine modified silicone resin and an aminosilane coupling agent,
wherein the aminosilane coupling agent is included in a range of 5 to 40 weight parts with respect to 100 weight parts of the coating resin, and
wherein the carrier charges a toner negatively.

Dependencies are inferred from the claim text.

Facts

Application

10/529,536Filed 30 Sep 2003

Priority

JP 2002-2903082 Oct 2002

Published

9 Mar 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G03G 9/1136
Obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: containing silicon atoms
G03G 9/113
Characterised by carrier particles: having coatings applied thereto
G03G 9/1135
Macromolecular components of coatings: obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
G03G 9/1138
Having coatings applied thereto: non-macromolecular organic components of coatings

Carrier for electrophotography

Life of this patent

Carrier for electrophotography

Life of this patent

Abstract

Claims11