Xerox Corporation

Gerald R Allison

Hadi K Mahabadi

Michael Steven Hawkins

Enno Eric Agur

Sheau V Kao

Bernard Grushkin

Stephan V Drappel

Paul Joseph Gerroir

Thomas R Hoffend

Hui Chang

Angelo J Barbetta

Maria N McDougall

T Brian McAneney

Joo T Chung

William H Hollenbaugh, Jr

J Stephen Kittelberger

Richard P Veregin

Gregory J Kovacs

Michael K Georges

John A Creatura

Che C Chow

Edward J Gutman

Robert M Jacobs

Nancy A Listigovers

Maria V McDougall

Nam S Ro

Robert A Downing

Frank P Lee

Geroge Liebermann

Gopalan Vijayakumar

A process for the preparation of microsynthetic carrier comprising the melting of a mixture of binder resin, magnetic component, colorant and optionally charge control additive, thereby forming a polymer melt, and mixing said mixture in a melt mixing device, cooling and pelletizing said mixture, and thereafter grinding and classifying said pellets.

Carrier pelletizing processes

A process for the preparation of carrier comprised of mixing in a high shear device a carrier core and a carrier coating.

Coated carrier

Processes for low melt crosslinked toner resins and toner

Low fix temperature toners are fabricated by a two step melt mixing and reactive melt mixing process wherein there is initially prepared, for example, using a melt mixing device, a composite of pigment and resin, followed by crosslinking of the resin component at high temperature and high shear to produce a partially crosslinked toner with substantially no unpigmented gel domains. The toners are particularly suitable for high speed fusing, show excellent offset resistance and wide fusing latitude, and superior vinyl offset properties.

Toner reactive melt mixing process

A low melt, high gloss toner resin with low minimum fix temperature, wide fusing latitude and wide gloss latitude contains a linear portion and 1 to 10 percent by weight of a crosslinked portion containing high density, crosslinked microgel particles, but substantially free of low density, crosslinked polymer. The resin is particularly suitable for high gloss applications, such as process color and color transparencies, and for high speed fusing, shows excellent offset resistance, wide fusing latitude, wide gloss latitude and superior vinyl offset properties. The resin may be formed by reactive melt mixing.

High gloss, low melt crosslinked resins and toners

A one step process for the preparation of toner compositions which comprises adding to an extruder a base resin, initiator, pigment, and optional charge enhancing additive; effecting crosslinking of the base resin in the extruder to provide a toner comprising a pigment, optional charge additive and crosslinked resin comprising linear portions and crosslinked portions; and wherein said crosslinked portions are comprised of densely crosslinked microgel particles.

Processes for preparing toner

Low fix temperature toner resins are fabricated by a reactive melt mixing process wherein polymer resins are cross-linked at high temperature and high shear. The resins are particularly suitable for high speed fusing, show excellent offset resistance and wide fusing latitude and superior vinyl offset properties.

Reactive melt mixing process for preparing cross-linked toner resins and

Reactive melt mixing process for preparing cross-linked toner resin

A toner composition comprised of resin particles, pigment particles, wax component particles, and a compatibilizer.

Toner and developer compositions with compatibilizer

Disclosed is a toner composition comprised of pigment particles and monovinyl aromatic terpene copolymer resin particles, and more specifically styrene terpene copolymer resins.

Toner compositions with styrene terpene resins

A low melt toner resin with low minimum fix temperature and wide fusing latitude contains a linear portion and a cross-linked portion containing high density cross-linked microgel particles, but substantially no low density cross-linked polymer. The resin may be formed by reactive melt mixing.

Toners having cross-linked toner resins

A method for making conductive toner particles includes (A) heat treating in fluidized bed processing equipment a mixture of non-conductive toner particles containing a thermoplastic resin and a colorant, and an effective amount of conductive powder blended with and coated on surfaces of the non-conductive toner particles, wherein the heat treatment is carried out at a temperature at or above the glass transition temperature of the resin for a period of time at least sufficient to fuse the conductive powder onto the surfaces of the non-conductive toner particles, and then (B) cooling the heated conductive toner particles to a temperature below the glass transition temperature of the resin. The final toner particles have a conductivity of at least about 10.sup.-8 ohm.sup.-1 -cm.sup.-1 and preferably from about 10.sup.-4 to about 10.sup.-8 ohm.sup.-1 -cm.sup.-1.

Preparation of conductive toners using fluidized bed processing equipment

Toner and developer compositions with block or graft copolymer

Cross-linked toner resins

Growing community of inventors

Oakville, Canada

Gerald R Allison