Xerox Corporation

Thomas R Hoffend

Robert D Bayley

Carol A Fox

Angelo J Barbetta

Scott M Silence

K Derek Henderson

Hadi K Mahabadi

Enno Eric Agur

Bernard Grushkin

John G VanDusen

Michael Steven Hawkins

Guerino G Sacripante

Stephan V Drappel

Maria N McDougall

Gerald R Allison

Clifford O Eddy

Robert A Nelson

James R Paxson

Thomas Edward Enright

Edward J Gutman

Donald A Seanor

Don B Jugle

Paula J MacLeod

Stephen Strella

Charles H Honeyman

Michelle M Bruzee

George R Imperial

Richard D Manca

Timothy J Fuller

Shadi L Malhotra

Chieh-Min Cheng

Kathleen M Carmichael

Edward F Grabowski

Joseph C Mammino

Paul Farrell Smith

Roger N Ciccarelli

Robert J Gruber

Vladislav Skorokhod

Timothy L Lincoln

Deepak R Maniar

Peter F Erhardt

Suresh K Ahuja

Raymond A Yourd, Iii

Anita P Lynch

Joseph R Weber

Emery G Tokoli

Moshe Levy

Edward J Radigan

John G Van Dusen

Mary L McStravick

Susan Robinette

Doretta Agostine

Raymond R Wells

Richard Phillip Nelson Veregin

A composition comprised of resin and colorant, and wherein the colorant is stabilized with an ultra-violet stabilizer.

Toner compositions

A process which comprises mixing a carrier core with a polymer core and polymer shell and wherein the polymer shell is present as a coating on said core and said polymer core, wherein said polymer core is generated by emulsification of and heating of monomer forming a seed latex; adding a portion of said seed latex to said emulsification mixture, followed by heating and adding another second portion of said seed latex; and wherein said shell is generated by emulsion polymerization of a monomer, followed by heating.

Coated Carriers

Micro-powder coating for xerographic carrier

A carrier comprised of a core and thereover a polymer generated from (1) a polymer containing amine groups, and (2) a second polymer containing sulfonic functional groups.

Coated carrier

A carrier comprised of a core and thereover a polymer generated from a blend of a polymer containing amine groups and a second polymer containing carboxylic acid functional groups.

A carrier comprised of a core and thereover a polymer generated from the reaction of a component containing amine groups and a component containing epoxy groups.

Coated carriers

A composition comprised of a core and thereover a polymer of (1) polystyrene/alkyl methacrylate/dialkylaminoethyl methacrylate, (2) polystyrene/alkyl methacrylate/alkyl hydrogen aminoethyl methacrylate, (3) polystyrene/alkyl acrylate/dialkylaminoethyl methacrylate, or (4) polystyrene/alkyl acrylate/alkyl hydrogen aminoethyl methacrylate.

A carrier comprised of a core and a polymer coating of (1) styrene/monoalkylaminoalkyl methacrylate or (2) styrene/dialkylaminoalkyl methacrylate.

A carrier comprised of a core and thereover a polymer of (1) methylmethacrylate and a monoalkyl aminoalkyl methacrylate, or (2) a polymer of methylmethacrylate and dialkylaminoalkyl methacrylate.

A carrier comprised of a core and thereover a polymer of styrene, an olefin and a dialkylaminoalkyl methacrylate.

A carrier comprised of a core and a polymer coating containing a quaternary ammonium salt functionality.

A toner composition comprised of a polyester resin with hydrophobic end groups, colorant, optional wax, optional charge additive, and optional surface additives.

Toner and developer compositions

A toner composition comprised of a polyester resin with hydrophobic end groups, pigment, optional wax, optional charge additive, and optional surface additives.

Unsaturated linear polymers have repeating units of a reaction product of a first monomer, a second monomer, a third monomer and optionally a fourth monomer. The linear polymers have a glass transition temperature ranging from about 52.degree. C. to about 61.degree. C. The first monomer should have a weight average molecular weight less than 200. The second monomer may be a dicarboxylic acid or diester which is different than the third monomer. A concentration of second residues of the polymer, derived from the second monomer, ranges from about 3 wt. % to about 15 wt. %, based on the total weight of the polymer. The third monomer is an aromatic dicarboxylic acid or an ester thereof. In the polymer, a concentration of third residues, derived from the third monomer, ranges from about 40 wt. % to about 55 wt. %, based on the total weight of the polymer. The fourth monomer is a diol having a higher molecular weight than the first monomer. In a process for preparing the inventive polymer, the first, second, third monomer (and optionally a fourth monomer) and/or a catalyst undergo transesterification to form the unsaturated, linear polymer.

Unsaturated polyesters

A solution polymerization process for producing an organic polymer from styrene and at least one other polymerizable monomer comprising providing a liquid reaction medium suitable for conducting said polymerization, wherein the reaction medium contains styrene and a polymerizable monomer other than styrene; and, anionically polymerizing styrene and monomer, thereby forming random copolymer chains, wherein the total quantity of said styrene used in said polymerization is at least 50% by weight based on the total weight of styrene and other polymerizable monomers used in the polymerization. A second embodiment comprises a copolymer made by the above-described method. A third embodiment comprises a process for forming a toner, wherein the process comprises providing a liquid reaction medium suitable for conducting a solution polymerization, the reaction medium containing at least two polymerizable monomers; anionically polymerizing the monomers, thereby forming random and nearly random copolymer chains; finely dividing the copolymer into particles; and, incorporating said particles into a composition for use as a toner. A fourth embodiment comprises a toner made by extrusion with pigment or colorant and change control additive to form small particles. A fifth embodiment comprises a solution polymerization process for producing an organic polymer wherein a difunctional initiator is used to initiate said polymerization.

Random copolymers made by anionic polymerization, toners incorporating

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Webster, NY, United States of America

Thomas R Hoffend