US 6,010,810 A · Electrophotographic photoreceptor, process for the preparation thereof and image forming apparatus comprising the same

Abstract

An electrophotographic photoreceptor comprising an electrically-conductive substrate having thereon at least a photosensitive layer and a surface protective layer: wherein the surface protective layer has a network structure formed by the reaction of hydroxyl group-containing compounds with an isocyanate group-containing compound; and wherein at least one of the hydroxyl group-containing compounds is an electric charge-transporting material containing a hydroxyl group. Also disclosed are a preparation process of the electrophotographic photoreceptor and an image forming apparatus comprising the electrophotographic photoreceptor.

Claims22

Dependent claims

An electrophotographic photoreceptor comprising an electrically-conductive substrate having thereon at least a photosensitive layer and a surface protective layer:

wherein the surface protective layer has a network structure formed by the reaction of hydroxyl group-containing compounds with an isocyanate group-containing compound;
and
wherein at least one of the hydroxyl group-containing compounds is an electric charge-transporting material containing a hydroxyl group.

A preparation process of an electrophotographic photoreceptor comprising the steps of:

providing an electrically conductive substrate having thereon a photosensitive layer;
applying a coating solution containing a hydroxyl group-containing compound and an isocyanate group-containing compound to a photosensitive layer;
and then
heating the photosensitive layer to effect crosslinking polymerization, to thereby form a surface protective layer on the photosensitive layer.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

08/951,666Filed 16 Oct 1997

Priority

JP 8-27351316 Oct 1996

Granted

4 Jan 2000

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G03G 5/14769
Obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds: other polycondensates comprising nitrogen atoms with or…
G03G 5/047
Photoconductive layers characterised by having two or more layers or characterised by their composite structure: characterised by the…
G03G 5/0698
Characterised by the photoconductive material being organic: compounds of unspecified structure characterised by a substituent only
G03G 5/14791
Macromolecular material: macromolecular compounds characterised by their structure, e.g. block polymers, reticulated polymers, or by their…

Electrophotographic photoreceptor, process for the preparation thereof and image forming apparatus comprising the same

Life of this patent

Electrophotographic photoreceptor, process for the preparation thereof and image forming apparatus comprising the same

Life of this patent

Abstract

Claims22