Xerox Corporation

George Liebermann

Ah-Mee Hor

Sandra J Gardner

Roger E Gaynor

Thomas Edward Enright

James Daniel Mayo

Hadi K Mahabadi

Cheng-Kuo Hsiao

Dasarao K Murti

Marko D Saban

Richard A Burt

Barkev Keoshkerian

Cuong Vong

Scott M Silence

Tie Hwee Ng

Guerino G Sacripante

Rina Carlini

James McConnell Duff

Michael Steven Hawkins

Katsumi Daimon

H Bruce Goodbrand

Allan K Chen

Bernard A Kelly

Daniel M McNeil

William J Dale

Katsumi Nukada

Chieh-Min Cheng

Stephan V Drappel

Kathleen M Carmichael

William W Limburg

Jeffrey H Banning

Walter Mychajlowskij

Gordon K Hamer

Giuseppa Baranyi

Rafik O Loutfy

Michael F Cunningham

K Derek Henderson

Emily Louise Moore

Carol A Jennings

Sheau V Kao

Abdisamed Sheik-Qasim

Donald J Teney

Milan Maric

Arthur Helbrecht

Nam S Ro

Aron J Cogswell

Nan-Xing Hu

Naveen Chopra

Peter Michael Kazmaier

John F Yanus

Richard P N Veregin

Shadi L Malhotra

Satchidanand Mishra

Joseph C Mammino

Anthony M Horgan

Paul Farrell Smith

Francisco Eduardo Torres

Kent J Evans

Timothy P Bender

Shigang S Qiu

Daniel A Foucher

Richard L Post

Jaan Noolandi

Enno Eric Agur

Richard P Veregin

Yasuo Sakaguchi

Yvan Gagnon

Johann Junginger

Ryosaku Igarashi

Anthony J Paine

Patricia Ann Burns

Terry L Bluhm

Dennis J Prosser

Michael J Duggan

David R Kurceba

Christine E Bedford

Maria N McDougall

Edward A Domm

Anthony T Ward

Michael E Zak

Clifford H Griffiths

Marie-Eve Perron

John Abate

Paula J MacLeod

John L Haack

Emery G Tokoli

Charles G Allen

Michael M Shahin

Nathan Maurice Belliveau

Alan E Toth

Alan E J Toth

Eric Bain Wasmund

Sarah J P Robinson

Liqin Chen

Kenneth Derek Henderson

Alan John Toth

Thomas B McAneney

Evelyn Juandi

Allan Kwok-Wai Chen

Cheng-Kuo Hsaio

Processes for making photosensitive organic pigments for use in imaging members, specifically processes for making a photosensitive phthalocyanine pigments having a specific crystal form, comprising dissolving the pigment in a mixture of a haloacetic acid and alkylene halide to form a solution, precipitating the pigment by adding the solution to a non-solvent system, the solution comprised of one or more organic solvents and a small amount of water, wherein the amount of water controls the crystal form of the pigment, followed by a treatment with a halobenzene to obtain a highly photosensitive second crystal form of the pigment.

Process for making organic photosensitive pigment

Processes for making organic pigments useful in imaging members, specifically for pigments that after further polymorphic conversion may be used in a charge generating layer of an imaging member. More specifically, there are described processes for producing titanyl phthalocyanine (TiOPc) in high yields using tetrahydronaphthalene as reaction solvent, such as TiOPc Type I. This pigment can be successfully converted to a high sensitivity crystal form useful as charge generating pigment in an imaging member.

Process for making titanyl phthalocyanine

A process for preparing a curable polyester based emulsion is provided in embodiments, containing one or more unsaturated polyesters and one or more photoinitiators obtained by a phase inversion process, in which the particle size and particle size distribution is controlled by process parameters, such as solvent, solvent ratio, neutralization ratio of the resin and temperature.

Curable polyester latex made by phase inversion emulsification

An emulsion polymerization process comprising polymerizing monomer in an emulsion in a reaction vessel at a first temperature to form a resin; cooling the reaction vessel to a second temperature that is above the softening point of the resin yet below the temperature required for significant depolymerization reaction to occur; and adding water to the cooled reaction vessel in an amount sufficient to effect phase inversion with mixing for a sufficient time to form an aqueous latex emulsion in the absence of a surfactant.

Emulsion polymerization process

An imaging member includes a charge generating layer and a charge transport layer. The charge transport layer includes a first surface in contact with the charge generating layer and a second surface. The charge transport layer includes a film forming polymer binder and a charge transport component dispersed therein. The concentration of the charge transport component in the charge transport layer is at a peak in a region of the charge transport intermediate the first and second surfaces of the charge transport layer.

Imaging member

A composition comprised of a charge transport compound and a crosslinked polymer composition generated from the curing of a solution of a hydroxyl pendant polycarbonate, a hydroxylated charge transport compound, a curing agent and a solvent.

Imaging members with crosslinked polycarbonate in charge transport layer

A method of making a multichromal sphere includes the steps of preparing a composition of at least (1) a matrix material and (2) at least two sets of particles, each of the sets of particles having a color different from at least one of another of the sets of particles and a segregation (e.g., an electrical or magnetic) property different from at least one of another of the sets of particles, encapsulating the composition within a shell to form an encapsulated sphere, immobilizing the encapsulated sphere in a manner to restrict at least rotation of the encapsulated sphere, subjecting the immobilized encapsulated sphere to an external field associated with the segregation property different among the sets of particles, under conditions in which the sets of particles are able to migrate within the matrix material, thereby producing color segregation in the immobilized encapsulated sphere, and solidifying the matrix material while substantially maintaining the color segregation. In the multichromal spheres, each of the sets of particles is segregated within a separate segment of the solidified matrix material of the core on the basis of the different segregation property.

Preparation of micromultichromal spheres

A toner process comprising the aggregation and coalescence of a sulfonated polyester and a colorant, and wherein said polyester possesses a degree of sulfonation or a sulfonation percentage of from about 0.5 to about 3 mol percent.

Toner processes

Process for preparing substituted pyridone compounds

A process comprising forming chlorogallium phthalocyanine (ClGaPc) in N-methyl-2-pyrrolidinone (NMP) to provide a ClGaPc (NMP) Type I; separately dry milling and then wet treating the Type I product to form Type II ClGaPc (NMP); blending the ClGaPc Type II product with hydroxygallium phthalocyanine (HOGaPc) Type V and a resin to form a coating mixture; coating the resulting mixture to form a photoconductive charge generator layer.

Imaging members

Disclosed is a process which comprises (a) reacting allyl bromide with diethyl amine in a molar ratio of at least about 1 mole of allyl bromide per about 1.15 moles of diethyl amine and in a molar ratio of no more than about 1 mole of allyl bromide per about 2 moles of diethyl amine, thereby generating allyl diethyl amine in a monomer reaction mixture; (b) subsequently filtering the monomer reaction mixture to remove impurities; (c) subsequently reacting the allyl diethyl amine with allyl bromide, thereby generating solid diallyl diethyl ammonium bromide; (d) subsequently isolating the solid diallyl diethyl ammonium bromide; (e) subsequently dissolving the diallyl diethyl ammonium bromide in a solvent and adding thereto a polymerization initiator to form a polymerization reaction mixture; (f) subsequently heating the polymerization reaction mixture in a vessel equipped with a reflux condenser to a temperature of from about 90 to about 100&deg; C., thereby generating poly(diallyl diethyl ammonium bromide); and (g) subsequently optionally isolating the poly(diallyl diethyl ammonium bromide) from the polymerization reaction mixture.

Process for preparing waterfastness additive

Method for making dimeric azo pyridone colorants

Processes for preparing dianthranilate compounds and diazopyridone colorants

A process for the preparation of a latex polymer consistent with E/A (emulsion/aggregation/coalescence) toner manufacture. The process utilizes a standard (universal) latex composition and involves chain-transfer agent partitioning, emulsion polymerization that provides a latex polymer with a wide range of molecular properties. In particular, the process customizes a wide range M (weight average molecular weight) latex, without substantially varying the M (number average molecular weight) and hence, without substantially varying Tg (glass transition temperature) such that good toner performance is maintained. In a preferred process, a latex polymer is prepared by mixing a seed particle latex, generated by aqueous emulsion polymerization of a first portion of a monomer emulsion, with a second portion of the monomer emulsion and at least one chain-transfer agent. The mixing is done in the presence of a free-radical initiator and heated, and wherein the monomer emulsion comprises a mixture of polymerization reagents of at least one monomer, at least one chain-transfer agent, at least one surfactant, and water. This process may be applied to core-shell polymerization as well. These latex polymers are ideally suited in the manufacture of toner and developer for electrophotographic imaging and printing.

Latex processes

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Mississauga, Canada

George Liebermann