Lexmark International, Inc.

David Glenn Black

Weimei Luo

Mark Thomas Bellino

Dat Quoc Nguyen

Ronald Harold Levin

James Alan Hartman

Tanya Yvonne Thames

Kasturi Rangan Srinivasan

Scott Daniel Reeves

Franklin Dilworth Zartman

Gregory Walter Haggquist

Rudolph Wayne Hrobsky

Laura Lee Kierstein

Vincent Wen-Hwa Ting

Garry Dale Hinch

Robert Max Lopez, Jr

Weimei Luo Gheleta

Bradford Lee Taylor

A charge transport molecule contains four radical polymerizable functional groups of the general structure exemplified below: where Rand Rcontain a spacer group and a radical polymerizable functional group, Rand Rare hydrogen atoms, and Rand Rcontain a spacer group and a radical polymerizable functional group wherein the spacer group of R, R, Rand Ris an ethyl group and the radical polymerizable functional group of R, R, Rand Ris an acrylate group.

Charge transport molecule having hydrogen for an overcoat of a photoconductor

An overcoat layer for an organic photoconductor drum includes a curable composition having about 20 to about 80 percent by weight of a charge transport molecule containing four radical polymerizable functional groups as exemplified below: where Rand Rcontain a spacer group and a radical polymerizable functional group, Rand Rare hydrogen atoms, and Rand Rcontain a spacer group and a radical polymerizable functional group. The curable composition may also include a non-radical polymerizable additive, such as a surfactant, and/or a curing agent.

Overcoat for a photoconductor with tetrafunctional radical polymerizable charge transport molecule having hydrogen

An improved overcoat layer for an organic photoconductor drum used in an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a charge transport molecule containing four radical polymerizable hydrophilic functional groups containing an oxygen atom of the general structure shown below: wherein Rand Rcontain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom, Rand Rare a non-radical polymerizable functional group, and Rand Rcontain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom. The curable composition may also contain at least one optional curing agent. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its service life.

Photoconductor overcoat having a charge transport molecule with four radical polymerizable hydrophilic functional groups containing an oxygen atom and method of making the same

A method to make an improved organic photoconductor drum of an electrophotographic image forming device is provided. The improved organic photoconductor drum is prepared using a curable composition including a charge transport molecule containing four radical polymerizable functional groups containing an oxygen atom of the general structure shown below: wherein Rand Rcontain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom, Rand Rare a non-radical polymerizable functional group, and Rand Rcontain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom. The curable composition may also contain at least one optional curing agent.

Photoconductor having protective overcoat layer with a charge transport molecule with four radical polymerizable hydrophilic functional groups containing an oxygen atom and method of making the same

An improved organic photoconductor drum used in an electrophotographic image forming device and method to make the same is provided. The organic photoconductor drum contains a protective overcoat. The protective overcoat is prepared from a curable composition including a charge transport molecule containing four radical polymerizable hydrophilic functional groups containing an oxygen atom of the general structure shown below: where Rand Rcontain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom, Rand Rare a non-radical polymerizable functional group, and Rand Rcontain a spacer group and a radical polymerizable hydrophilic functional group containing an oxygen atom. The curable composition may also contain at least one curing agent. This organic photoconductor drum has excellent wear resistance without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its service life.

A charge transport molecule containing four radical polymerizable functional groups used in an overcoat for an organic photoconductor drum of an electrophotographic image forming device is provided. The charge transport molecule containing four radical polymerizable functional groups of the general structure exemplified below: where Rand Rcontain a spacer group and a radical polymerizable functional group, Rand Rare selected from the group consisting of a radical polymerizable functional group, a non-radical polymerizable functional group, and one each of a radical polymerizable functional group and a non-radial polymerizable functional group, and Rand Rcontain a spacer group and a radical polymerizable functional group.

Method to make a photoconductor having an overcoat with tetrafunctional radical polymerizable charge transport molecule

A method to make an improved organic photoconductor drum of an electrophotographic image forming device is provided. The improved organic photoconductor drum is prepared using a curable composition including a charge transport molecule containing four radical polymerizable functional groups of the general structure exemplified below: where Rand Rcontain a spacer group and a radical polymerizable functional group, Rand Rare selected from the group consisting of a radical polymerizable functional group, a non-radical polymerizable functional group, and one each of a radical polymerizable functional group and a non-radial polymerizable functional group, and Rand Rcontain a spacer group and a radical polymerizable functional group.

An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a triphenylamine charge transport containing two ethyl acrylate functional groups and a urethane resin containing six radical polymerizable functional groups. The amount of the triphenylamine charge transport containing two ethyl acrylate functional groups in the curable composition is about 20 to about 80 percent by weight. The amount of the urethane resin containing six radical polymerizable functional groups in the curable composition is about 20 to about 80 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and ultimately providing a photoconductor with a longer useful life when compared to other organic photoconductors commercially available.

Photoconductor overcoat having a radical polymerizable charge transport molecule containing two ethyl acrylate functional groups and urethane acrylate resins containing six radical polymerizable functional groups

The present invention provides a simple, cost effective and time saving one step method for synthesizing triarylamines comprising two alkyl alcohol without the need for the protection and the deprotection steps. More particularly, the invention provides an improved method of producing triarylamine compounds having two alkyl alcohol groups by reaction of a primary arylamine (aniline) with a halogenated aryl alkyl alcohol. The reaction proceeds in one step, whereby a primary arylamine is reacted with two equivalents of a halogenated aryl alkyl alcohol in the presence of a catalytic amount of palladium, ligand, solvent and base.

Cost effective method of producing triarylamine compounds having two alkly alcohols

Photoconductor overcoat having radical polymerizable charge transport molecules containing two ethyl acrylate functional groups and urethane acrylate resins containing six radical polymerizable functional groups

An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a charge transport molecule containing four radical polymerizable functional groups of the general structure exemplified below: where Rand Rcontain a spacer group and a radical polymerizable functional group, Rand Rare selected from the group consisting of a radical polymerizable functional group, a non-radical polymerizable functional group, and one each of a radical polymerizable functional group and a non-radial polymerizable functional group, and Rand Rcontain a spacer group and a radical polymerizable functional group. The curable composition also contains at least one curing agent. The curing agent comprises a urethane resin containing six radical polymerizable functional groups. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its service life.

Photoconductor overcoat having tetrafunctional radical polymerizable charge transport molecule

A photoreceptor comprising a spectral marker and an electrophotographic printer using the same wherein the presence of the spectral marker is detected by the spectral marker detector, which enables photoreceptor authentication and thickness determinations, thereby permitting adjustment and optimization of component operating parameters within the electrophotographic printer.

Electrophotographic photoreceptor having a spectral marker and electrophotographic printer using the same

Embodiments of a photoconductor for use in a printer or printer cartridge comprise an electrically conductive substrate, a charge generation layer disposed over the electrically conductive substrate, and a charge transport layer disposed over the charge generation layer, wherein the charge transport layer comprises charge transport molecules with octyl/decyl glycidyl ether (OGE) or dodecyl/tetradecyl glycidyl ether (DGE), or combinations thereof, added to improve resistance to crazing, cracking and crystallization in the change transport layer.

Control of crazing, cracking or crystallization of a charge transport layer in a photoconductor

This invention provides an organic photoconductor which does not experience end-seal wear in normal use. This invention provides charge transport formulation that is easily prepared and coated by standard, dip-coating methods. This is realized by addition of a small amount of poly(methyl methacrylate-co-ethylene glycol dimethacrylate). Commercially available, 8&#x3bc; spherical particles are used. These microspheres are insoluble in common organic solvents, but are readily dispersed into polycarbonate-based charge transport formulations. A photoconductor roller is mounted in pressure engagement with two end seals, each on opposite side of the roller.

Additive for photoconductor end seal wear mitigation

A method for recycling photoconductors is disclosed. In this method, the charge transport layer is selectively removed from the photoconductor without adversely affecting the electrical properties of the charge generating layer. The recycled drum may then be recoated with a new charge transport layer and reused in an electrophotographic process. In this method, the photoconductor to be recycled is placed in a specifically selected solvent, such as a dibasic ester, and is subjected to ultrasonic energy, preferably for a period not to exceed about 15 minutes.

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Broomfield, CO, United States of America

David Glenn Black